340 files changed, 7781 insertions, 2663 deletions

diff --git a/Vagrantfile b/Vagrantfile
index adb93a3ce..8125b0589 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -6,7 +6,7 @@ Vagrant.configure(2) do |config|
   config.vm.define "qmk_firmware"
 
   # VMware/Virtualbox ( and also Hyperv/Parallels) 64 bit
-  config.vm.box = "generic/debian9"
+  config.vm.box = "generic/debian10"
   
   config.vm.synced_folder '.', '/vagrant'
 
diff --git a/build_json.mk b/build_json.mk
index 8822be6a1..28659f260 100644
--- a/build_json.mk
+++ b/build_json.mk
@@ -1,22 +1,22 @@
 # Look for a json keymap file
 ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_5)/keymap.json)","")
-    KEYMAP_C := $(KEYBOARD_OUTPUT)/src/keymap.c
+    KEYMAP_C := $(KEYMAP_OUTPUT)/keymap.c
     KEYMAP_JSON := $(MAIN_KEYMAP_PATH_5)/keymap.json
     KEYMAP_PATH := $(MAIN_KEYMAP_PATH_5)
 else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_4)/keymap.json)","")
-    KEYMAP_C := $(KEYBOARD_OUTPUT)/src/keymap.c
+    KEYMAP_C := $(KEYMAP_OUTPUT)/keymap.c
     KEYMAP_JSON := $(MAIN_KEYMAP_PATH_4)/keymap.json
     KEYMAP_PATH := $(MAIN_KEYMAP_PATH_4)
 else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_3)/keymap.json)","")
-    KEYMAP_C := $(KEYBOARD_OUTPUT)/src/keymap.c
+    KEYMAP_C := $(KEYMAP_OUTPUT)/keymap.c
     KEYMAP_JSON := $(MAIN_KEYMAP_PATH_3)/keymap.json
     KEYMAP_PATH := $(MAIN_KEYMAP_PATH_3)
 else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_2)/keymap.json)","")
-    KEYMAP_C := $(KEYBOARD_OUTPUT)/src/keymap.c
+    KEYMAP_C := $(KEYMAP_OUTPUT)/keymap.c
     KEYMAP_JSON := $(MAIN_KEYMAP_PATH_2)/keymap.json
     KEYMAP_PATH := $(MAIN_KEYMAP_PATH_2)
 else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_1)/keymap.json)","")
-    KEYMAP_C := $(KEYBOARD_OUTPUT)/src/keymap.c
+    KEYMAP_C := $(KEYMAP_OUTPUT)/keymap.c
     KEYMAP_JSON := $(MAIN_KEYMAP_PATH_1)/keymap.json
     KEYMAP_PATH := $(MAIN_KEYMAP_PATH_1)
 endif
@@ -27,5 +27,5 @@ ifneq ("$(wildcard $(KEYMAP_PATH))", "")
 endif
 
 # Generate the keymap.c
-$(KEYBOARD_OUTPUT)/src/keymap.c: $(KEYMAP_JSON)
+$(KEYMAP_C): $(KEYMAP_JSON)
         $(QMK_BIN) json2c --quiet --output $(KEYMAP_C) $(KEYMAP_JSON)
diff --git a/build_keyboard.mk b/build_keyboard.mk
index 91a6c23b7..4c4ff3b5f 100644
--- a/build_keyboard.mk
+++ b/build_keyboard.mk
@@ -103,6 +103,15 @@ MAIN_KEYMAP_PATH_5 := $(KEYBOARD_PATH_5)/keymaps/$(KEYMAP)
 INFO_RULES_MK = $(shell $(QMK_BIN) generate-rules-mk --quiet --escape --keyboard $(KEYBOARD) --output $(KEYBOARD_OUTPUT)/src/rules.mk)
 include $(INFO_RULES_MK)
 
+ifneq ($(FORCE_LAYOUT),)
+    TARGET := $(TARGET)_$(FORCE_LAYOUT)
+endif
+
+# Object files and generated keymap directory
+#     To put object files in current directory, use a dot (.), do NOT make
+#     this an empty or blank macro!
+KEYMAP_OUTPUT := $(BUILD_DIR)/obj_$(TARGET)
+
 # Check for keymap.json first, so we can regenerate keymap.c
 include build_json.mk
 
@@ -145,10 +154,6 @@ ifeq ($(strip $(CONVERT_TO_PROTON_C)), yes)
     include platforms/chibios/QMK_PROTON_C/convert_to_proton_c.mk
 endif
 
-ifneq ($(FORCE_LAYOUT),)
-    TARGET := $(TARGET)_$(FORCE_LAYOUT)
-endif
-
 include quantum/mcu_selection.mk
 
 # Find all the C source files to be compiled in subfolders.
@@ -327,11 +332,6 @@ endif
 # Disable features that a keyboard doesn't support
 -include disable_features.mk
 
-# Object files directory
-#     To put object files in current directory, use a dot (.), do NOT make
-#     this an empty or blank macro!
-KEYMAP_OUTPUT := $(BUILD_DIR)/obj_$(TARGET)
-
 ifneq ("$(wildcard $(KEYMAP_PATH)/config.h)","")
     CONFIG_H += $(KEYMAP_PATH)/config.h
 endif
diff --git a/build_test.mk b/build_test.mk
index 77c4265f9..5171c58c3 100644
--- a/build_test.mk
+++ b/build_test.mk
@@ -49,6 +49,7 @@ endif
 
 include common_features.mk
 include $(TMK_PATH)/common.mk
+include $(QUANTUM_PATH)/debounce/tests/rules.mk
 include $(QUANTUM_PATH)/sequencer/tests/rules.mk
 include $(QUANTUM_PATH)/serial_link/tests/rules.mk
 ifneq ($(filter $(FULL_TESTS),$(TEST)),)
diff --git a/common_features.mk b/common_features.mk
index 1a9fd46b5..a790b8432 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -230,9 +230,12 @@ ifneq (,$(filter $(MCU), atmega16u2 atmega32u2 at90usb162))
     # ATmegaxxU2 does not have hardware MUL instruction - lib8tion must be told to use software multiplication routines
     OPT_DEFS += -DLIB8_ATTINY
 endif
+    COMMON_VPATH += $(QUANTUM_DIR)/led_matrix
+    COMMON_VPATH += $(QUANTUM_DIR)/led_matrix/animations
+    COMMON_VPATH += $(QUANTUM_DIR)/led_matrix/animations/runners
     SRC += $(QUANTUM_DIR)/process_keycode/process_backlight.c
-    SRC += $(QUANTUM_DIR)/led_matrix.c
-    SRC += $(QUANTUM_DIR)/led_matrix_drivers.c
+    SRC += $(QUANTUM_DIR)/led_matrix/led_matrix.c
+    SRC += $(QUANTUM_DIR)/led_matrix/led_matrix_drivers.c
     CIE1931_CURVE := yes
 
     ifeq ($(strip $(LED_MATRIX_DRIVER)), IS31FL3731)
@@ -244,7 +247,7 @@ endif
 endif
 
 RGB_MATRIX_ENABLE ?= no
-VALID_RGB_MATRIX_TYPES := IS31FL3731 IS31FL3733 IS31FL3737 IS31FL3741 WS2812 custom
+VALID_RGB_MATRIX_TYPES := AW20216 IS31FL3731 IS31FL3733 IS31FL3737 IS31FL3741 WS2812 custom
 
 ifeq ($(strip $(RGB_MATRIX_ENABLE)), yes)
     ifeq ($(filter $(RGB_MATRIX_DRIVER),$(VALID_RGB_MATRIX_TYPES)),)
@@ -255,12 +258,22 @@ ifneq (,$(filter $(MCU), atmega16u2 atmega32u2 at90usb162))
     # ATmegaxxU2 does not have hardware MUL instruction - lib8tion must be told to use software multiplication routines
     OPT_DEFS += -DLIB8_ATTINY
 endif
+    COMMON_VPATH += $(QUANTUM_DIR)/rgb_matrix
+    COMMON_VPATH += $(QUANTUM_DIR)/rgb_matrix/animations
+    COMMON_VPATH += $(QUANTUM_DIR)/rgb_matrix/animations/runners
     SRC += $(QUANTUM_DIR)/color.c
-    SRC += $(QUANTUM_DIR)/rgb_matrix.c
-    SRC += $(QUANTUM_DIR)/rgb_matrix_drivers.c
+    SRC += $(QUANTUM_DIR)/rgb_matrix/rgb_matrix.c
+    SRC += $(QUANTUM_DIR)/rgb_matrix/rgb_matrix_drivers.c
     CIE1931_CURVE := yes
     RGB_KEYCODES_ENABLE := yes
 
+    ifeq ($(strip $(RGB_MATRIX_DRIVER)), AW20216)
+        OPT_DEFS += -DAW20216 -DSTM32_SPI -DHAL_USE_SPI=TRUE
+        COMMON_VPATH += $(DRIVER_PATH)/awinic
+        SRC += aw20216.c
+        QUANTUM_LIB_SRC += spi_master.c
+    endif
+
     ifeq ($(strip $(RGB_MATRIX_DRIVER)), IS31FL3731)
         OPT_DEFS += -DIS31FL3731 -DSTM32_I2C -DHAL_USE_I2C=TRUE
         COMMON_VPATH += $(DRIVER_PATH)/issi
@@ -529,7 +542,11 @@ ifeq ($(strip $(SPLIT_KEYBOARD)), yes)
 
     # Determine which (if any) transport files are required
     ifneq ($(strip $(SPLIT_TRANSPORT)), custom)
-        QUANTUM_LIB_SRC += $(QUANTUM_DIR)/split_common/transport.c
+        QUANTUM_SRC += $(QUANTUM_DIR)/split_common/transport.c \
+                       $(QUANTUM_DIR)/split_common/transactions.c
+
+        OPT_DEFS += -DSPLIT_COMMON_TRANSACTIONS
+
         # Functions added via QUANTUM_LIB_SRC are only included in the final binary if they're called.
         # Unused functions are pruned away, which is why we can add multiple drivers here without bloat.
         ifeq ($(PLATFORM),AVR)
@@ -550,6 +567,11 @@ ifeq ($(strip $(SPLIT_KEYBOARD)), yes)
     COMMON_VPATH += $(QUANTUM_PATH)/split_common
 endif
 
+ifeq ($(strip $(CRC_ENABLE)), yes)
+    OPT_DEFS += -DCRC_ENABLE
+    QUANTUM_LIB_SRC += crc.c
+endif
+
 HAPTIC_ENABLE ?= no
 ifneq ($(strip $(HAPTIC_ENABLE)),no)
     COMMON_VPATH += $(DRIVER_PATH)/haptic
@@ -580,6 +602,14 @@ ifeq ($(strip $(OLED_DRIVER_ENABLE)), yes)
     SRC += oled_driver.c
 endif
 
+ifeq ($(strip $(ST7565_ENABLE)), yes)
+    OPT_DEFS += -DST7565_ENABLE
+    COMMON_VPATH += $(DRIVER_PATH)/oled # For glcdfont.h
+    COMMON_VPATH += $(DRIVER_PATH)/lcd
+    QUANTUM_LIB_SRC += spi_master.c
+    SRC += st7565.c
+endif
+
 include $(DRIVER_PATH)/qwiic/qwiic.mk
 
 ifeq ($(strip $(UCIS_ENABLE)), yes)
diff --git a/data/schemas/api_keyboard.jsonschema b/data/schemas/api_keyboard.jsonschema
index d570ee999..d638658a1 100644
--- a/data/schemas/api_keyboard.jsonschema
+++ b/data/schemas/api_keyboard.jsonschema
@@ -1,34 +1,22 @@
 {
+    "$id": "qmk.api.keyboard.v1",
     "allOf": [
-        { "$ref": "qmk.keyboard.v1" },
+        {"$ref": "qmk.keyboard.v1"},
         {
-            "$id": "qmk.api.keyboard.v1",
-            "keymaps": {
-                "type": "string"
-            },
-            "parse_errors": {
-                "type": "array",
-                "items": {
-                    "type": "string"
-                }
-            },
-            "parse_warnings": {
-                "type": "array",
-                "items": {
-                    "type": "string"
-                }
-            },
-            "processor_type": {
-                "type": "string"
-            },
-            "protocol": {
-                "type": "string"
-            },
-            "keyboard_folder": {
-                "type": "string"
-            },
-            "platform": {
-                "type": "string"
+            "properties": {
+                "keymaps": {
+                    "type": "object",
+                    "properties": {
+                        "url": {"type": "string"}
+                    }
+
+                },
+                "parse_errors": {"$ref": "qmk.definitions.v1#/string_array"},
+                "parse_warnings": {"$ref": "qmk.definitions.v1#/string_array"},
+                "processor_type": {"type": "string"},
+                "protocol": {"type": "string"},
+                "keyboard_folder": {"type": "string"},
+                "platform": {"type": "string"}
             }
         }
     ]
diff --git a/data/schemas/definitions.jsonschema b/data/schemas/definitions.jsonschema
new file mode 100644
index 000000000..822f23707
--- /dev/null
+++ b/data/schemas/definitions.jsonschema
@@ -0,0 +1,107 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "$id": "qmk.definitions.v1",
+    "title": "Common definitions used across QMK's jsonschemas.",
+    "type": "object",
+    "boolean_array": {
+        "type": "object",
+        "additionalProperties": {"type": "boolean"}
+    },
+    "filename": {
+        "type": "string",
+        "minLength": 1,
+        "pattern": "^[0-9a-z_]*$"
+    },
+    "hex_number_2d": {
+        "type": "string",
+        "pattern": "^0x[0-9A-F]{2}$"
+    },
+    "hex_number_4d": {
+        "type": "string",
+        "pattern": "^0x[0-9A-F]{4}$"
+    },
+    "text_identifier": {
+        "type": "string",
+        "minLength": 1,
+        "maxLength": 250
+    },
+    "layout_macro": {
+        "oneOf": [
+            {
+                "type": "string",
+                "enum": ["LAYOUT", "LAYOUT_planck_1x2uC"]
+            },
+            {
+                "type": "string",
+                "pattern": "^LAYOUT_[0-9a-z_]*$"
+            }
+        ]
+    },
+    "key_unit": {
+        "type": "number",
+        "min": 0.25
+    },
+    "mcu_pin_array": {
+        "type": "array",
+        "items": {"$ref": "#/mcu_pin"}
+    },
+    "mcu_pin": {
+        "oneOf": [
+            {
+                "type": "string",
+                "pattern": "^[A-K]\\d{1,2}$"
+            },
+            {
+                "type": "string",
+                "pattern": "^LINE_PIN\\d{1,2}$"
+            },
+            {
+                "type": "number",
+                "multipleOf": 1
+            },
+            {
+                "type": "null"
+            }
+        ]
+    },
+    "signed_decimal": {
+        "type": "number"
+    },
+    "signed_int": {
+        "type": "number",
+        "multipleOf": 1
+    }
+    "signed_int_8": {
+        "type": "number",
+        "min": -127,
+        "max": 127,
+        "multipleOf": 1
+    }
+    "string_array": {
+        "type": "array",
+        "items": {
+            "type": "string"
+        }
+    },
+    "string_object": {
+        "type": "object",
+        "additionalProperties": {
+            "type": "string"
+        }
+    },
+    "unsigned_decimal": {
+        "type": "number",
+        "min": 0
+    },
+    "unsigned_int": {
+        "type": "number",
+        "min": 0,
+        "multipleOf": 1
+    }
+    "unsigned_int_8": {
+        "type": "number",
+        "min": 0,
+        "max": 255,
+        "multipleOf": 1
+    }
+}
diff --git a/data/schemas/keyboard.jsonschema b/data/schemas/keyboard.jsonschema
index c335f49d5..d6d33ce4e 100644
--- a/data/schemas/keyboard.jsonschema
+++ b/data/schemas/keyboard.jsonschema
@@ -1,24 +1,12 @@
 {
-    "$schema": "http://json-schema.org/schema#",
+    "$schema": "http://json-schema.org/draft-07/schema#",
     "$id": "qmk.keyboard.v1",
     "title": "Keyboard Information",
     "type": "object",
     "properties": {
-        "keyboard_name": {
-            "type": "string",
-            "minLength": 2,
-            "maxLength": 250
-        },
-        "maintainer": {
-            "type": "string",
-            "minLength": 2,
-            "maxLength": 250
-        },
-        "manufacturer": {
-            "type": "string",
-            "minLength": 2,
-            "maxLength": 250
-        },
+        "keyboard_name": {"$ref": "qmk.definitions.v1#/text_identifier"},
+        "maintainer": {"$ref": "qmk.definitions.v1#/text_identifier"},
+        "manufacturer": {"$ref": "qmk.definitions.v1#/text_identifier"},
         "url": {
             "type": "string",
             "format": "uri"
@@ -40,62 +28,25 @@
             "type": "string",
             "enum": ["COL2ROW", "ROW2COL"]
         },
-        "debounce": {
-            "type": "number",
-            "min": 0,
-            "multipleOf": 1
-        },
-        "height": {
-            "type": "number",
-            "min": 0.25
-        },
-        "width": {
-            "type": "number",
-            "min": 0.25
-        },
+        "debounce": {"$ref": "qmk.definitions.v1#/unsigned_int"},
+        "height": {"$ref": "qmk.definitions.v1#/key_unit"},
+        "width": {"$ref": "qmk.definitions.v1#/key_unit"},
         "community_layouts": {
             "type": "array",
-            "items": {
-                "type": "string",
-                "minLength": 2,
-                "pattern": "^[0-9a-z_]*$"
-            }
-        },
-        "features": {
-            "type": "object",
-            "additionalProperties": {"type": "boolean"}
+            "items": {"$ref": "qmk.definitions.v1#/filename"}
         },
+        "features": {"$ref": "qmk.definitions.v1#/boolean_array"},
         "indicators": {
             "type": "object",
             "properties": {
-                "caps_lock": {
-                    "type": "string",
-                    "pattern": "^[A-K]\\d{1,2}$"
-                },
-                "num_lock": {
-                    "type": "string",
-                    "pattern": "^[A-K]\\d{1,2}$"
-                },
-                "scroll_lock": {
-                    "type": "string",
-                    "pattern": "^[A-K]\\d{1,2}$"
-                }
+                "caps_lock": {"$ref": "qmk.definitions.v1#/mcu_pin"},
+                "num_lock": {"$ref": "qmk.definitions.v1#/mcu_pin"},
+                "scroll_lock": {"$ref": "qmk.definitions.v1#/mcu_pin"}
             }
         },
         "layout_aliases": {
             "type": "object",
-            "additionalProperties": {
-                "oneOf": [
-                    {
-                        "type": "string",
-                        "enum": ["LAYOUT", "LAYOUT_planck_1x2uC"]
-                    },
-                    {
-                        "type": "string",
-                        "pattern": "^LAYOUT_[0-9a-z_]*$"
-                    }
-                ]
-            }
+            "additionalProperties": {"$ref": "qmk.definitions.v1#/layout_macro"}
         },
         "layouts": {
             "type": "object",
@@ -109,11 +60,7 @@
                     "c_macro": {
                         "type": "boolean"
                     },
-                    "key_count": {
-                        "type": "number",
-                        "min": 0,
-                        "multipleOf": 1
-                    },
+                    "key_count": {"$ref": "qmk.definitions.v1#/key_unit"},
                     "layout": {
                         "type": "array",
                         "items": {
@@ -131,34 +78,14 @@
                                         "multipleOf": 1
                                     }
                                 },
-                                "h": {
-                                    "type": "number",
-                                    "min": 0.25
-                                },
-                                "r": {
-                                    "type": "number",
-                                    "min": 0
-                                },
-                                "rx": {
-                                    "type": "number",
-                                    "min": 0
-                                },
-                                "ry": {
-                                    "type": "number",
-                                    "min": 0
-                                },
-                                "w": {
-                                    "type": "number",
-                                    "min": 0.25
-                                },
-                                "x": {
-                                    "type": "number",
-                                    "min": 0
-                                },
-                                "y": {
-                                    "type": "number",
-                                    "min": 0
-                                }
+                                "key_count": {"$ref": "qmk.definitions.v1#/key_unit"},
+                                "r": {"$ref": "qmk.definitions.v1#/unsigned_decimal"},
+                                "rx": {"$ref": "qmk.definitions.v1#/unsigned_decimal"},
+                                "ry": {"$ref": "qmk.definitions.v1#/unsigned_decimal"},
+                                "h": {"$ref": "qmk.definitions.v1#/key_unit"},
+                                "w": {"$ref": "qmk.definitions.v1#/key_unit"},
+                                "x": {"$ref": "qmk.definitions.v1#/key_unit"},
+                                "y": {"$ref": "qmk.definitions.v1#/key_unit"}
                             }
                         }
                     }
@@ -171,61 +98,10 @@
             "properties": {
                 "direct": {
                     "type": "array",
-                    "items": {
-                        "type": "array",
-                        "items": {
-                            "oneOf": [
-                                {
-                                    "type": "string",
-                                    "pattern": "^[A-K]\\d{1,2}$"
-                                },
-                                {
-                                    "type": "number",
-                                    "multipleOf": 1
-                                },
-                                {
-                                    "type": "null"
-                                }
-                            ]
-                        }
-                    }
-                },
-                "cols": {
-                    "type": "array",
-                    "items": {
-                        "oneOf": [
-                            {
-                                "type": "string",
-                                "pattern": "^[A-K]\\d{1,2}$"
-                            },
-                            {
-                                "type": "number",
-                                "multipleOf": 1
-                            },
-                            {
-                                "type": "null"
-                            }
-                        ]
-                    }
+                    "items": {$ref": "qmk.definitions.v1#/mcu_pin_array"}
                 },
-                "rows": {
-                    "type": "array",
-                    "items": {
-                        "oneOf": [
-                            {
-                                "type": "string",
-                                "pattern": "^[A-K]\\d{1,2}$"
-                            },
-                            {
-                                "type": "number",
-                                "multipleOf": 1
-                            },
-                            {
-                                "type": "null"
-                            }
-                        ]
-                    }
-                }
+                "cols": {"$ref": "qmk.definitions.v1#/mcu_pin_array"},
+                "rows": {"$ref": "qmk.definitions.v1#/mcu_pin_array"}
             }
         },
         "rgblight": {
@@ -238,47 +114,19 @@
                         "type": "boolean"
                     }
                 },
-                "brightness_steps": {
-                    "type": "number",
-                    "min": 0,
-                    "multipleOf": 1
-                },
-                "hue_steps": {
-                    "type": "number",
-                    "min": 0,
-                    "multipleOf": 1
-                },
-                "led_count": {
-                    "type": "number",
-                    "min": 0,
-                    "multipleOf": 1
-                },
-                "max_brightness": {
-                    "type": "number",
-                    "min": 0,
-                    "max": 255,
-                    "multipleOf": 1
-                },
-                "pin": {
-                    "type": "string",
-                    "pattern": "^[A-K]\\d{1,2}$"
-                },
-                "saturation_steps": {
-                    "type": "number",
-                    "min": 0,
-                    "multipleOf": 1
-                },
+                "brightness_steps": {"$ref": "qmk.definitions.v1#/unsigned_int"},
+                "hue_steps": {"$ref": "qmk.definitions.v1#/unsigned_int"},
+                "led_count": {"$ref": "qmk.definitions.v1#/unsigned_int"},
+                "max_brightness": {"$ref": "qmk.definitions.v1#/unsigned_int_8"},
+                "pin": {"$ref": "qmk.definitions.v1#/mcu_pin"},
+                "saturation_steps": {"$ref": "qmk.definitions.v1#/unsigned_int"},
                 "sleep": {"type": "boolean"},
                 "split": {"type": "boolean"},
                 "split_count": {
                     "type": "array",
                     "minLength": 2,
                     "maxLength": 2,
-                    "items": {
-                        "type": "number",
-                        "min": 0,
-                        "multipleOf": 1
-                    }
+                    "items": {"$ref": "qmk.definitions.v1#/unsigned_int"}
                 }
             }
         },
@@ -286,40 +134,19 @@
             "type": "object",
             "additionalProperties": false,
             "properties": {
-                "device_ver": {
-                    "type": "string",
-                    "pattern": "^[0-9A-F]x[0-9A-F][0-9A-F][0-9A-F][0-9A-F]"
-                },
-                "pid": {
-                    "type": "string",
-                    "pattern": "^[0-9A-F]x[0-9A-F][0-9A-F][0-9A-F][0-9A-F]"
-                },
-                "vid": {
-                    "type": "string",
-                    "pattern": "^[0-9A-F]x[0-9A-F][0-9A-F][0-9A-F][0-9A-F]"
-                }
+                "device_ver": {"$ref": "qmk.definitions.v1#/hex_number_4d"},
+                "pid": {"$ref": "qmk.definitions.v1#/hex_number_4d"},
+                "vid": {"$ref": "qmk.definitions.v1#/hex_number_4d"}
             }
         },
         "qmk_lufa_bootloader": {
             "type": "object",
             "additionalProperties": false,
             "properties": {
-                "esc_output": {
-                    "type": "string",
-                    "pattern": "^[A-K]\\d{1,2}$"
-                },
-                "esc_input": {
-                    "type": "string",
-                    "pattern": "^[A-K]\\d{1,2}$"
-                },
-                "led": {
-                    "type": "string",
-                    "pattern": "^[A-K]\\d{1,2}$"
-                },
-                "speaker": {
-                    "type": "string",
-                    "pattern": "^[A-K]\\d{1,2}$"
-                }
+                "esc_output": {"$ref": "qmk.definitions.v1#/mcu_pin"},
+                "esc_input": {"$ref": "qmk.definitions.v1#/mcu_pin"},
+                "led": {"$ref": "qmk.definitions.v1#/mcu_pin"},
+                "speaker": {"$ref": "qmk.definitions.v1#/mcu_pin"}
             }
         }
     }
diff --git a/docs/_summary.md b/docs/_summary.md
index 9798ef512..4141e01e7 100644
--- a/docs/_summary.md
+++ b/docs/_summary.md
@@ -93,6 +93,7 @@
   * Hardware Features
     * Displays
       * [HD44780 LCD Controller](feature_hd44780.md)
+      * [ST7565 LCD Driver](feature_st7565.md)
       * [OLED Driver](feature_oled_driver.md)
     * Lighting
       * [Backlight](feature_backlight.md)
diff --git a/docs/breaking_changes.md b/docs/breaking_changes.md
index b0d56a81b..a1a56bd45 100644
--- a/docs/breaking_changes.md
+++ b/docs/breaking_changes.md
@@ -100,3 +100,7 @@ This happens immediately after the previous `develop` branch is merged.
     * [ ] `git pull --ff-only`
     * [ ] `git merge --no-ff develop`
     * [ ] `git push upstream master`
+
+## Post-merge operations
+
+* (Optional) [update ChibiOS + ChibiOS-Contrib on `develop`](chibios_upgrade_instructions.md)
diff --git a/docs/chibios_upgrade_instructions.md b/docs/chibios_upgrade_instructions.md
new file mode 100644
index 000000000..40c2faafc
--- /dev/null
+++ b/docs/chibios_upgrade_instructions.md
@@ -0,0 +1,56 @@
+# ChibiOS Upgrade Procedure
+
+ChibiOS and ChibiOS-Contrib need to be updated in tandem -- the latter has a branch tied to the ChibiOS version in use and should not be mixed with different versions.
+
+## Getting ChibiOS
+
+* `svn` Initialisation:
+    * Only needed to be done once
+    * You might need to separately install `git-svn` package in your OS's package manager
+    * `git svn init --stdlayout --prefix='svn/' http://svn.osdn.net/svnroot/chibios/`
+    * `git remote add qmk git@github.com:qmk/ChibiOS.git`
+* Updating:
+    * `git svn fetch`
+    * First time around this will take several hours
+    * Subsequent updates will be incremental only
+* Tagging example (work out which version first!):
+    * `git tag -a ver20.3.3 -m ver20.3.3 svn/tags/ver20.3.3`
+    * `git push qmk ver20.3.3`
+    * `git tag -a breaking_YYYY_qN -m breaking_YYYY_qN svn/tags/ver20.3.3`
+    * `git push qmk breaking_YYYY_qN`
+
+## Getting ChibiOS-Contrib
+
+* `git` Initialisation:
+    * `git clone git@github.com:qmk/ChibiOS-Contrib`
+    * `git remote add upstream https://github.com/ChibiOS/ChibiOS-Contrib`
+    * `git checkout -b chibios-20.3.x upstream/chibios-20.3.x`
+* Updating:
+    * `git fetch --all --tags --prune`
+    * `git checkout chibios-20.3.x`
+    * `git pull --ff-only`
+    * `git push origin chibios-20.3.x`
+    * `git tag -a breaking_YYYY_qN -m breaking_YYYY_qN chibios-20.3.x`
+    * `git push origin breaking_YYYY_qN`
+
+## Updating submodules
+
+* Update the submodules
+    * `cd $QMK_FIRMWARE`
+    * `git checkout develop`
+    * `git pull --ff-only`
+    * `git checkout -b chibios-version-bump`
+    * `cd lib/chibios`
+    * `git fetch --all --tags --prune`
+    * `git checkout breaking_YYYY_qN`
+    * `cd ../chibios-contrib`
+    * `git fetch --all --tags --prune`
+    * `git checkout breaking_YYYY_qN`
+* Build everything
+    * `cd $QMK_FIRMWARE`
+    * `qmk multibuild -j4`
+    * Make sure there are no errors
+* Push to the repo
+    * `git commit -am 'Update ChibiOS to XXXXXXXXX'`
+    * `git push --set-upstream origin chibios-version-bump`
+* Make a PR to qmk_firmware with the new branch
\ No newline at end of file
diff --git a/docs/config_options.md b/docs/config_options.md
index d0f0b316e..980195ac6 100644
--- a/docs/config_options.md
+++ b/docs/config_options.md
@@ -51,8 +51,10 @@ This is a C header file that is one of the first things included, and will persi
   * the number of columns in your keyboard's matrix
 * `#define MATRIX_ROW_PINS { D0, D5, B5, B6 }`
   * pins of the rows, from top to bottom
+  * may be omitted by the keyboard designer if matrix reads are handled in an alternate manner. See [low-level matrix overrides](custom_quantum_functions.md?id=low-level-matrix-overrides) for more information.
 * `#define MATRIX_COL_PINS { F1, F0, B0, C7, F4, F5, F6, F7, D4, D6, B4, D7 }`
   * pins of the columns, from left to right
+  * may be omitted by the keyboard designer if matrix reads are handled in an alternate manner. See [low-level matrix overrides](custom_quantum_functions.md?id=low-level-matrix-overrides) for more information.
 * `#define MATRIX_IO_DELAY 30`
   * the delay in microseconds when between changing matrix pin state and reading values
 * `#define UNUSED_PINS { D1, D2, D3, B1, B2, B3 }`
@@ -272,7 +274,7 @@ There are a few different ways to set handedness for split keyboards (listed in
 ### Other Options
 
 * `#define USE_I2C`
-  * For using I2C instead of Serial (defaults to serial)
+  * For using I2C instead of Serial (default is serial; serial transport is supported on ARM -- I2C is AVR-only)
 
 * `#define SOFT_SERIAL_PIN D0`
   * When using serial, define this. `D0` or `D1`,`D2`,`D3`,`E6`.
@@ -280,6 +282,7 @@ There are a few different ways to set handedness for split keyboards (listed in
 * `#define MATRIX_ROW_PINS_RIGHT { <row pins> }`
 * `#define MATRIX_COL_PINS_RIGHT { <col pins> }`
   * If you want to specify a different pinout for the right half than the left half, you can define `MATRIX_ROW_PINS_RIGHT`/`MATRIX_COL_PINS_RIGHT`. Currently, the size of `MATRIX_ROW_PINS` must be the same as `MATRIX_ROW_PINS_RIGHT` and likewise for the definition of columns.
+  * may be omitted by the keyboard designer if matrix reads are handled in an alternate manner. See [low-level matrix overrides](custom_quantum_functions.md?id=low-level-matrix-overrides) for more information.
 
 * `#define DIRECT_PINS_RIGHT { { F1, F0, B0, C7 }, { F4, F5, F6, F7 } }`
   * If you want to specify a different direct pinout for the right half than the left half, you can define `DIRECT_PINS_RIGHT`. Currently, the size of `DIRECT_PINS` must be the same as `DIRECT_PINS_RIGHT`.
@@ -300,7 +303,7 @@ There are a few different ways to set handedness for split keyboards (listed in
 * `#define SPLIT_USB_DETECT`
   * Detect (with timeout) USB connection when delegating master/slave
   * Default behavior for ARM
-  * Required for AVR Teensy
+  * Required for AVR Teensy (without hardware mods)
 
 * `#define SPLIT_USB_TIMEOUT 2000`
   * Maximum timeout when detecting master/slave when using `SPLIT_USB_DETECT`
@@ -308,6 +311,28 @@ There are a few different ways to set handedness for split keyboards (listed in
 * `#define SPLIT_USB_TIMEOUT_POLL 10`
   * Poll frequency when detecting master/slave when using `SPLIT_USB_DETECT`
 
+* `#define FORCED_SYNC_THROTTLE_MS 100`
+  * Deadline for synchronizing data from master to slave when using the QMK-provided split transport.
+
+* `#define SPLIT_TRANSPORT_MIRROR`
+  * Mirrors the master-side matrix on the slave when using the QMK-provided split transport.
+
+* `#define SPLIT_LAYER_STATE_ENABLE`
+  * Ensures the current layer state is available on the slave when using the QMK-provided split transport.
+
+* `#define SPLIT_LED_STATE_ENABLE`
+  * Ensures the current host indicator state (caps/num/scroll) is available on the slave when using the QMK-provided split transport.
+
+* `#define SPLIT_MODS_ENABLE`
+  * Ensures the current modifier state (normal, weak, and oneshot) is available on the slave when using the QMK-provided split transport.
+
+* `#define SPLIT_WPM_ENABLE`
+  * Ensures the current WPM is available on the slave when using the QMK-provided split transport.
+
+* `#define SPLIT_TRANSACTION_IDS_KB .....`
+* `#define SPLIT_TRANSACTION_IDS_USER .....`
+  * Allows for custom data sync with the slave when using the QMK-provided split transport. See [custom data sync between sides](feature_split_keyboard.md#custom-data-sync) for more information.
+
 # The `rules.mk` File
 
 This is a [make](https://www.gnu.org/software/make/manual/make.html) file that is included by the top-level `Makefile`. It is used to set some information about the MCU that we will be compiling for as well as enabling and disabling certain features.
diff --git a/docs/custom_quantum_functions.md b/docs/custom_quantum_functions.md
index 694b421e7..30c637bb4 100644
--- a/docs/custom_quantum_functions.md
+++ b/docs/custom_quantum_functions.md
@@ -144,6 +144,14 @@ This is useful for setting up stuff that you may need elsewhere, but isn't hardw
 * Keyboard/Revision: `void matrix_init_kb(void)`
 * Keymap: `void matrix_init_user(void)`
 
+### Low-level Matrix Overrides Function Documentation :id=low-level-matrix-overrides
+
+* GPIO pin initialisation: `void matrix_init_pins(void)`
+  * This needs to perform the low-level initialisation of all row and column pins. By default this will initialise the input/output state of each of the GPIO pins listed in `MATRIX_ROW_PINS` and `MATRIX_COL_PINS`, based on whether or not the keyboard is set up for `ROW2COL`, `COL2ROW`, or `DIRECT_PINS`. Should the keyboard designer override this function, no initialisation of pin state will occur within QMK itself, instead deferring to the keyboard's override.
+* `COL2ROW`-based row reads: `void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)`
+* `ROW2COL`-based column reads: `void matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)`
+* `DIRECT_PINS`-based reads: `void matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)`
+  * These three functions need to perform the low-level retrieval of matrix state of relevant input pins, based on the matrix type. Only one of the functions should be implemented, if needed. By default this will iterate through `MATRIX_ROW_PINS` and `MATRIX_COL_PINS`, configuring the inputs and outputs based on whether or not the keyboard is set up for `ROW2COL`, `COL2ROW`, or `DIRECT_PINS`. Should the keyboard designer override this function, no manipulation of matrix GPIO pin state will occur within QMK itself, instead deferring to the keyboard's override.
 
 ## Keyboard Post Initialization code
 
diff --git a/docs/eeprom_driver.md b/docs/eeprom_driver.md
index e2c262546..6dcf10c04 100644
--- a/docs/eeprom_driver.md
+++ b/docs/eeprom_driver.md
@@ -31,6 +31,9 @@ Currently QMK supports 24xx-series chips over I2C. As such, requires a working i
 `#define EXTERNAL_EEPROM_PAGE_SIZE`         | Page size of the EEPROM in bytes, as specified in the datasheet                     | 32
 `#define EXTERNAL_EEPROM_ADDRESS_SIZE`      | The number of bytes to transmit for the memory location within the EEPROM           | 2
 `#define EXTERNAL_EEPROM_WRITE_TIME`        | Write cycle time of the EEPROM, as specified in the datasheet                       | 5
+`#define EXTERNAL_EEPROM_WP_PIN`            | If defined the WP pin will be toggled appropriately when writing to the EEPROM.     | _none_
+
+Some I2C EEPROM manufacturers explicitly recommend against hardcoding the WP pin to ground. This is in order to protect the eeprom memory content during power-up/power-down/brown-out conditions at low voltage where the eeprom is still operational, but the i2c master output might be unpredictable. If a WP pin is configured, then having an external pull-up on the WP pin is recommended.
 
 Default values and extended descriptions can be found in `drivers/eeprom/eeprom_i2c.h`.
 
diff --git a/docs/feature_debounce_type.md b/docs/feature_debounce_type.md
index 3ad74224c..306185fe8 100644
--- a/docs/feature_debounce_type.md
+++ b/docs/feature_debounce_type.md
@@ -121,16 +121,16 @@ DEBOUNCE_TYPE = <name of algorithm>
 Where name of algorithm is one of:
 * ```sym_defer_g``` - debouncing per keyboard. On any state change, a global timer is set. When ```DEBOUNCE``` milliseconds of no changes has occurred, all input changes are pushed.
   * This is the current default algorithm. This is the highest performance algorithm with lowest memory usage, and it's also noise-resistant.
-* ```sym_eager_pr``` - debouncing per row. On any state change, response is immediate, followed by locking the row ```DEBOUNCE``` milliseconds of no further input for that row. 
+* ```sym_eager_pr``` - debouncing per row. On any state change, response is immediate, followed by locking the row ```DEBOUNCE``` milliseconds of no further input for that row.
 For use in keyboards where refreshing ```NUM_KEYS``` 8-bit counters is computationally expensive / low scan rate, and fingers usually only hit one row at a time. This could be
 appropriate for the ErgoDox models; the matrix is rotated 90°, and hence its "rows" are really columns, and each finger only hits a single "row" at a time in normal use.
 * ```sym_eager_pk``` - debouncing per key. On any state change, response is immediate, followed by ```DEBOUNCE``` milliseconds of no further input for that key
 * ```sym_defer_pk``` - debouncing per key. On any state change, a per-key timer is set. When ```DEBOUNCE``` milliseconds of no changes have occurred on that key, the key status change is pushed.
+* ```asym_eager_defer_pk``` - debouncing per key. On a key-down state change, response is immediate, followed by ```DEBOUNCE``` milliseconds of no further input for that key. On a key-up state change, a per-key timer is set. When ```DEBOUNCE``` milliseconds of no changes have occurred on that key, the key-up status change is pushed.
 
 ### A couple algorithms that could be implemented in the future:
 * ```sym_defer_pr```
 * ```sym_eager_g```
-* ```asym_eager_defer_pk```
 
 ### Use your own debouncing code
 You have the option to implement you own debouncing algorithm. To do this:
diff --git a/docs/feature_haptic_feedback.md b/docs/feature_haptic_feedback.md
index a092e784c..469c9c798 100644
--- a/docs/feature_haptic_feedback.md
+++ b/docs/feature_haptic_feedback.md
@@ -162,4 +162,28 @@ This will set what sequence HPT_RST will set as the active mode. If not defined,
 
 ### DRV2605L Continuous Haptic Mode
 
-This mode sets continuous haptic feedback with the option to increase or decrease strength. 
+This mode sets continuous haptic feedback with the option to increase or decrease strength.
+
+## Haptic Key Exclusion
+The Haptic Exclusion is implemented as `__attribute__((weak)) bool get_haptic_enabled_key(uint16_t keycode, keyrecord_t *record)` in haptic.c. This allows a re-definition at the required level with the specific requirement / exclusion.
+
+### NO_HAPTIC_MOD
+With the entry of `#define NO_HAPTIC_MOD` in config.h, modifiers from Left Control to Right GUI will not trigger a feedback. This also includes modifiers in a Mod Tap configuration.
+
+### NO_HAPTIC_FN
+With the entry of `#define NO_HAPTIC_FN` in config.h, layer keys will not rigger a feedback.
+
+### NO_HAPTIC_ALPHA
+With the entry of `#define NO_HAPTIC_ALPHA` in config.h, none of the alpha keys (A ... Z) will trigger a feedback.
+
+### NO_HAPTIC_PUNCTUATION
+With the entry of `#define NO_HAPTIC_PUNCTUATION` in config.h, none of the following keys will trigger a feedback: Enter, ESC, Backspace, Space, Minus, Equal, Left Bracket, Right Bracket, Backslash, Non-US Hash, Semicolon, Quote, Grave, Comma, Slash, Dot, Non-US Backslash.
+
+### NO_HAPTIC_LOCKKEYS
+With the entry of `#define NO_HAPTIC_LOCKKEYS` in config.h, none of the following keys will trigger a feedback: Caps Lock, Scroll Lock, Num Lock.
+
+### NO_HAPTIC_NAV
+With the entry of `#define NO_HAPTIC_NAV` in config.h, none of the following keys will trigger a feedback: Print Screen, Pause, Insert, Delete, Page Down, Page Up, Left Arrow, Up Arrow, Right Arrow, Down Arrow, End, Home.
+
+### NO_HAPTIC_NUMERIC
+With the entry of `#define NO_HAPTIC_NUMERIC` in config.h, none of the following keys between 0 and 9 (KC_1 ... KC_0) will trigger a feedback.
\ No newline at end of file
diff --git a/docs/feature_oled_driver.md b/docs/feature_oled_driver.md
index f3b659b1b..c90aabb9c 100644
--- a/docs/feature_oled_driver.md
+++ b/docs/feature_oled_driver.md
@@ -346,6 +346,10 @@ bool oled_scroll_left(void);
 // Returns true if the screen was not scrolling or stops scrolling
 bool oled_scroll_off(void);
 
+// Inverts the display
+// Returns true if the screen was or is inverted
+bool oled_invert(bool invert);
+
 // Returns the maximum number of characters that will fit on a line
 uint8_t oled_max_chars(void);
 
diff --git a/docs/feature_rgb_matrix.md b/docs/feature_rgb_matrix.md
index bfb3688b6..925c9de6e 100644
--- a/docs/feature_rgb_matrix.md
+++ b/docs/feature_rgb_matrix.md
@@ -228,6 +228,75 @@ Configure the hardware via your `config.h`:
 ```
 
 ---
+### AW20216 :id=aw20216
+There is basic support for addressable RGB matrix lighting with the SPI AW20216 RGB controller. To enable it, add this to your `rules.mk`:
+
+```makefile
+RGB_MATRIX_ENABLE = yes
+RGB_MATRIX_DRIVER = AW20216
+```
+
+You can use up to 2 AW20216 IC's. Do not specify `DRIVER_<N>_xxx` defines for IC's that are not present on your keyboard. You can define the following items in `config.h`:
+
+| Variable | Description | Default |
+|----------|-------------|---------|
+| `DRIVER_1_CS` | (Required) MCU pin connected to first RGB driver chip select line  | B13 |
+| `DRIVER_2_CS` | (Optional) MCU pin connected to second RGB driver chip select line  | |
+| `DRIVER_1_EN` | (Required) MCU pin connected to first RGB driver hardware enable line  | C13 |
+| `DRIVER_2_EN` | (Optional) MCU pin connected to second RGB driver hardware enable line  | |
+| `DRIVER_1_LED_TOTAL` | (Required) How many RGB lights are connected to first RGB driver  | |
+| `DRIVER_2_LED_TOTAL` | (Optional) How many RGB lights are connected to second RGB driver  | |
+| `DRIVER_COUNT` | (Required) How many RGB driver IC's are present | |
+| `DRIVER_LED_TOTAL` | (Required) How many RGB lights are present across all drivers | |
+| `AW_SCALING_MAX` | (Optional) LED current scaling value (0-255, higher values mean LED is brighter at full PWM) | 150 |
+| `AW_GLOBAL_CURRENT_MAX` | (Optional) Driver global current limit (0-255, higher values means the driver may consume more power) | 150 |
+| `AW_SPI_DIVISOR` | (Optional) Clock divisor for SPI communication (powers of 2, smaller numbers means faster communication, should not be less than 4) | 4 |
+
+Here is an example using 2 drivers.
+
+```c
+#define DRIVER_1_CS B13
+#define DRIVER_2_CS B14
+// Hardware enable lines may be connected to the same pin
+#define DRIVER_1_EN C13
+#define DRIVER_2_EN C13
+
+#define DRIVER_COUNT 2
+#define DRIVER_1_LED_TOTAL 66
+#define DRIVER_2_LED_TOTAL 32
+#define DRIVER_LED_TOTAL (DRIVER_1_LED_TOTAL + DRIVER_2_LED_TOTAL)
+```
+
+!> Note the parentheses, this is so when `DRIVER_LED_TOTAL` is used in code and expanded, the values are added together before any additional math is applied to them. As an example, `rand() % (DRIVER_1_LED_TOTAL + DRIVER_2_LED_TOTAL)` will give very different results than `rand() % DRIVER_1_LED_TOTAL + DRIVER_2_LED_TOTAL`.
+
+Define these arrays listing all the LEDs in your `<keyboard>.c`:
+
+```c
+const aw_led g_aw_leds[DRIVER_LED_TOTAL] = {
+/* Each AW20216 channel is controlled by a register at some offset between 0x00
+ * and 0xD7 inclusive.
+ * See drivers/awinic/aw20216.h for the mapping between register offsets and
+ * driver pin locations.
+ *    driver
+ *    |  R location
+ *    |  |        G location
+ *    |  |        |        B location
+ *    |  |        |        | */
+    { 0, CS1_SW1, CS2_SW1, CS3_SW1 },
+    { 0, CS4_SW1, CS5_SW1, CS6_SW1 },
+    { 0, CS7_SW1, CS8_SW1, CS9_SW1 },
+    { 0, CS10_SW1, CS11_SW1, CS12_SW1 },
+    { 0, CS13_SW1, CS14_SW1, CS15_SW1 },
+    ...
+    { 1, CS1_SW1, CS2_SW1, CS3_SW1 },
+    { 1, CS13_SW1, CS14_SW1, CS15_SW1 },
+    { 1, CS16_SW1, CS17_SW1, CS18_SW1 },
+    { 1, CS4_SW2, CS5_SW2, CS6_SW2 },
+    ...
+};
+```
+
+---
 
 ## Common Configuration :id=common-configuration
 
diff --git a/docs/feature_split_keyboard.md b/docs/feature_split_keyboard.md
index 4ebf585f5..603c387c2 100644
--- a/docs/feature_split_keyboard.md
+++ b/docs/feature_split_keyboard.md
@@ -8,8 +8,7 @@ QMK Firmware has a generic implementation that is usable by any board, as well a
 
 For this, we will mostly be talking about the generic implementation used by the Let's Split and other keyboards. 
 
-!> ARM is not yet fully supported for Split Keyboards and has many limitations. Progress is being made, but we have not yet reached 100% feature parity.
-
+!> ARM split supports most QMK subsystems when using the 'serial' and 'serial_usart' drivers. I2C slave is currently unsupported.
 
 ## Compatibility Overview
 
@@ -169,7 +168,7 @@ Because not every split keyboard is identical, there are a number of additional
 #define USE_I2C
 ```
 
-This enables I<sup>2</sup>C support for split keyboards. This isn't strictly for communication, but can be used for OLED or other I<sup>2</sup>C-based devices. 
+This configures the use of I<sup>2</sup>C support for split keyboard transport (AVR only).  
 
 ```c
 #define SOFT_SERIAL_PIN D0
@@ -193,20 +192,115 @@ If you're having issues with serial communication, you can change this value, as
 * **`5`**: about 20kbps
 
 ```c
-#define SPLIT_MODS_ENABLE
+#define FORCED_SYNC_THROTTLE_MS 100
 ```
 
-This enables transmitting modifier state (normal, weak and oneshot) to the non
-primary side of the split keyboard.  This adds a few bytes of data to the split
-communication protocol and may impact the matrix scan speed when enabled.
-The purpose of this feature is to support cosmetic use of modifer state (e.g.
-displaying status on an OLED screen).
+This sets the maximum number of milliseconds before forcing a synchronization of data from master to slave. Under normal circumstances this sync occurs whenever the data _changes_, for safety a data transfer occurs after this number of milliseconds if no change has been detected since the last sync. 
 
 ```c
 #define SPLIT_TRANSPORT_MIRROR
 ```
 
-This mirrors the master side matrix to the slave side for features that react or require knowledge of master side key presses on the slave side.  This adds a few bytes of data to the split communication protocol and may impact the matrix scan speed when enabled. The purpose of this feature is to support cosmetic use of key events (e.g. RGB reacting to Keypresses).
+This mirrors the master side matrix to the slave side for features that react or require knowledge of master side key presses on the slave side. The purpose of this feature is to support cosmetic use of key events (e.g. RGB reacting to keypresses). This adds overhead to the split communication protocol and may negatively impact the matrix scan speed when enabled. 
+
+```c
+#define SPLIT_LAYER_STATE_ENABLE
+```
+
+This enables syncing of the layer state between both halves of the split keyboard. The main purpose of this feature is to enable support for use of things like OLED display of the currently active layer. This adds overhead to the split communication protocol and may negatively impact the matrix scan speed when enabled. 
+
+```c
+#define SPLIT_LED_STATE_ENABLE
+```
+
+This enables syncing of the Host LED status (caps lock, num lock, etc) between both halves of the split keyboard. The main purpose of this feature is to enable support for use of things like OLED display of the Host LED status. This adds overhead to the split communication protocol and may negatively impact the matrix scan speed when enabled. 
+
+```c
+#define SPLIT_MODS_ENABLE
+```
+
+This enables transmitting modifier state (normal, weak and oneshot) to the non primary side of the split keyboard. The purpose of this feature is to support cosmetic use of modifer state (e.g. displaying status on an OLED screen). This adds overhead to the split communication protocol and may negatively impact the matrix scan speed when enabled. 
+
+```c
+#define SPLIT_WPM_ENABLE
+```
+
+This enables transmitting the current WPM to the slave side of the split keyboard. The purpose of this feature is to support cosmetic use of WPM (e.g. displaying the current value on an OLED screen). This adds overhead to the split communication protocol and may negatively impact the matrix scan speed when enabled. 
+
+### Custom data sync between sides :id=custom-data-sync
+
+QMK's split transport allows for arbitrary data transactions at both the keyboard and user levels. This is modelled on a remote procedure call, with the master invoking a function on the slave side, with the ability to send data from master to slave, process it slave side, and send data back from slave to master.
+
+To leverage this, a keyboard or user/keymap can define a comma-separated list of _transaction IDs_:
+
+```c
+// for keyboard-level data sync:
+#define SPLIT_TRANSACTION_IDS_KB KEYBOARD_SYNC_A, KEYBOARD_SYNC_B
+// or, for user:
+#define SPLIT_TRANSACTION_IDS_USER USER_SYNC_A, USER_SYNC_B, USER_SYNC_C
+```
+
+These _transaction IDs_ then need a slave-side handler function to be registered with the split transport, for example:
+
+```c
+typedef struct _master_to_slave_t {
+    int m2s_data;
+} master_to_slave_t;
+
+typedef struct _slave_to_master_t {
+    int s2m_data;
+} slave_to_master_t;
+
+void user_sync_a_slave_handler(uint8_t in_buflen, const void* in_data, uint8_t out_buflen, void* out_data) {
+    const master_to_slave_t *m2s = (const master_to_slave_t*)in_data;
+    slave_to_master_t *s2m = (slave_to_master_t*)out_data;
+    s2m->s2m_data = m2s->m2s_data + 5; // whatever comes in, add 5 so it can be sent back
+}
+
+void keyboard_post_init_user(void) {
+    transaction_register_rpc(USER_SYNC_A, user_sync_a_slave_handler);
+}
+```
+
+The master side can then invoke the slave-side handler - for normal keyboard functionality to be minimally affected, any keyboard- or user-level code attempting to sync data should be throttled:
+
+```c
+void housekeeping_task_user(void) {
+    if (is_keyboard_master()) {
+        // Interact with slave every 500ms
+        static uint32_t last_sync = 0;
+        if (timer_elapsed32(last_sync) > 500) {
+            master_to_slave_t m2s = {6};
+            slave_to_master_t s2m = {0};
+            if(transaction_rpc_exec(USER_SYNC_A, sizeof(m2s), &m2s, sizeof(s2m), &s2m)) {
+                last_sync = timer_read32();
+                dprintf("Slave value: %d\n", s2m.s2m_data); // this will now be 11, as the slave adds 5
+            } else {
+                dprint("Slave sync failed!\n");
+            }
+        }
+    }
+}
+```
+
+!> It is recommended that any data sync between halves happens during the master side's _housekeeping task_. This ensures timely retries should failures occur.
+
+If only one-way data transfer is needed, helper methods are provided:
+
+```c
+bool transaction_rpc_exec(int8_t transaction_id, uint8_t initiator2target_buffer_size, const void *initiator2target_buffer, uint8_t target2initiator_buffer_size, void *target2initiator_buffer);
+bool transaction_rpc_send(int8_t transaction_id, uint8_t initiator2target_buffer_size, const void *initiator2target_buffer);
+bool transaction_rpc_recv(int8_t transaction_id, uint8_t target2initiator_buffer_size, void *target2initiator_buffer);
+```
+
+By default, the inbound and outbound data is limited to a maximum of 32 bytes each. The sizes can be altered if required:
+
+```c
+// Master to slave:
+#define RPC_M2S_BUFFER_SIZE 48
+// Slave to master:
+#define RPC_S2M_BUFFER_SIZE 48
+```
 
 ###  Hardware Configuration Options
 
diff --git a/docs/feature_st7565.md b/docs/feature_st7565.md
new file mode 100644
index 000000000..de3e44d8e
--- /dev/null
+++ b/docs/feature_st7565.md
@@ -0,0 +1,274 @@
+# ST7565 LCD Driver
+
+## Supported Hardware
+
+LCD modules using ST7565 driver IC, communicating over SPI.
+
+|Module                        |IC     |Size  |Notes                                                     |
+|------------------------------|-------|------|----------------------------------------------------------|
+|Newhaven Display NHD-C12832A1Z|ST7565R|128x32|Used by Ergodox Infinity; primary consumer of this feature|
+|Zolentech ZLE12864B           |ST7565P|128x64|Requires contrast adjustment                              |
+
+## Usage
+
+To enable the feature, there are three steps. First, when compiling your keyboard, you'll need to add the following to your `rules.mk`:
+
+```make
+ST7565_ENABLE = yes
+```
+
+Then in your `keymap.c` file, implement the ST7565 task call. This example assumes your keymap has three layers named `_QWERTY`, `_FN` and `_ADJ`:
+
+```c
+#ifdef ST7565_ENABLE
+void st7565_task_user(void) {
+    // Host Keyboard Layer Status
+    st7565_write_P(PSTR("Layer: "), false);
+
+    switch (get_highest_layer(layer_state)) {
+        case _QWERTY:
+            st7565_write_P(PSTR("Default\n"), false);
+            break;
+        case _FN:
+            st7565_write_P(PSTR("FN\n"), false);
+            break;
+        case _ADJ:
+            st7565_write_P(PSTR("ADJ\n"), false);
+            break;
+        default:
+            // Or use the write_ln shortcut over adding '\n' to the end of your string
+            st7565_write_ln_P(PSTR("Undefined"), false);
+    }
+
+    // Host Keyboard LED Status
+    led_t led_state = host_keyboard_led_state();
+    st7565_write_P(led_state.num_lock ? PSTR("NUM ") : PSTR("    "), false);
+    st7565_write_P(led_state.caps_lock ? PSTR("CAP ") : PSTR("    "), false);
+    st7565_write_P(led_state.scroll_lock ? PSTR("SCR ") : PSTR("    "), false);
+}
+#endif
+```
+
+## Logo Example
+
+In the default font, certain ranges of characters are reserved for a QMK logo. To render this logo to the screen, use the following code example:
+
+```c
+static void render_logo(void) {
+    static const char PROGMEM qmk_logo[] = {
+        0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, 0x92, 0x93, 0x94,
+        0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, 0xB4,
+        0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0x00
+    };
+
+    st7565_write_P(qmk_logo, false);
+}
+```
+
+## Buffer Read Example
+For some purposes, you may need to read the current state of the display buffer. The `st7565_read_raw` function can be used to safely read bytes from the buffer.
+
+In this example, calling `fade_display` in the `st7565_task_user` function will slowly fade away whatever is on the screen by turning random pixels off over time.
+```c
+//Setup some mask which can be or'd with bytes to turn off pixels
+const uint8_t single_bit_masks[8] = {127, 191, 223, 239, 247, 251, 253, 254};
+
+static void fade_display(void) {
+    //Define the reader structure
+    display_buffer_reader_t reader;
+    uint8_t buff_char;
+    if (random() % 30 == 0) {
+        srand(timer_read());
+        // Fetch a pointer for the buffer byte at index 0. The return structure
+        // will have the pointer and the number of bytes remaining from this
+        // index position if we want to perform a sequential read by
+        // incrementing the buffer pointer
+        reader = st7565_read_raw(0);
+        //Loop over the remaining buffer and erase pixels as we go
+        for (uint16_t i = 0; i < reader.remaining_element_count; i++) {
+            //Get the actual byte in the buffer by dereferencing the pointer
+            buff_char = *reader.current_element;
+            if (buff_char != 0) {
+                st7565_write_raw_byte(buff_char & single_bit_masks[rand() % 8], i);
+            }
+            //increment the pointer to fetch a new byte during the next loop
+            reader.current_element++;
+        }
+    }
+}
+```
+
+## Other Examples
+
+In split keyboards, it is very common to have two displays that each render different content and are oriented or flipped differently. You can do this by switching which content to render by using the return value from `is_keyboard_master()` or `is_keyboard_left()` found in `split_util.h`, e.g:
+
+```c
+#ifdef ST7565_ENABLE
+display_rotation_t st7565_init_user(display_rotation_t rotation) {
+    if (!is_keyboard_master()) {
+        return DISPLAY_ROTATION_180;  // flips the display 180 degrees if offhand
+    }
+
+    return rotation;
+}
+
+void st7565_task_user(void) {
+    if (is_keyboard_master()) {
+        render_status();  // Renders the current keyboard state (layer, lock, caps, scroll, etc)
+    } else {
+        render_logo();  // Renders a static logo
+    }
+}
+#endif
+```
+
+## Basic Configuration
+
+|Define                  |Default       |Description                                                                                          |
+|------------------------|--------------|-----------------------------------------------------------------------------------------------------|
+|`ST7565_A0_PIN`         |*Not defined* |(Required) The GPIO connected to the display's A0 (data/command) pin                                 |
+|`ST7565_RST_PIN`        |*Not defined* |(Required) The GPIO connected to the display's reset pin                                             |
+|`ST7565_SS_PIN`         |*Not defined* |(Required) The GPIO connected to the display's slave select pin                                      |
+|`ST7565_SPI_CLK_DIVISOR`|`4`           |The SPI clock divisor to use                                                                         |
+|`ST7565_FONT_H`         |`"glcdfont.c"`|The font code file to use for custom fonts                                                           |
+|`ST7565_FONT_START`     |`0`           |The starting character index for custom fonts                                                        |
+|`ST7565_FONT_END`       |`223`         |The ending character index for custom fonts                                                          |
+|`ST7565_FONT_WIDTH`     |`6`           |The font width                                                                                       |
+|`ST7565_FONT_HEIGHT`    |`8`           |The font height (untested)                                                                           |
+|`ST7565_TIMEOUT`        |`60000`       |Turns off the screen after 60000ms of keyboard inactivity. Helps reduce burn-in. Set to 0 to disable.|
+|`ST7565_COLUMN_OFFSET`  |`0`           |Shift output to the right this many pixels.                                                          |
+|`ST7565_CONTRAST`       |`32`          |The default contrast level of the display, from 0 to 255.                                            |
+|`ST7565_UPDATE_INTERVAL`|`0`           |Set the time interval for updating the display in ms. This will improve the matrix scan rate.        |
+
+## Custom sized displays
+
+The default display size for this feature is 128x32 and all necessary defines are precalculated with that in mind.
+
+|Define                 |Default   |Description                                                                                                |
+|-----------------------|----------|-----------------------------------------------------------------------------------------------------------|
+|`ST7565_DISPLAY_WIDTH` |`128`     |The width of the display.                                                                                  |
+|`ST7565_DISPLAY_HEIGHT`|`32`      |The height of the display.                                                                                 |
+|`ST7565_MATRIX_SIZE`   |`512`     |The local buffer size to allocate.<br>`(ST7565_DISPLAY_HEIGHT / 8 * ST7565_DISPLAY_WIDTH)`.                |
+|`ST7565_BLOCK_TYPE`    |`uint16_t`|The unsigned integer type to use for dirty rendering.                                                      |
+|`ST7565_BLOCK_COUNT`   |`16`      |The number of blocks the display is divided into for dirty rendering.<br>`(sizeof(ST7565_BLOCK_TYPE) * 8)`.|
+|`ST7565_BLOCK_SIZE`    |`32`      |The size of each block for dirty rendering<br>`(ST7565_MATRIX_SIZE / ST7565_BLOCK_COUNT)`.                 |
+
+## API
+
+```c
+// Rotation enum values are flags
+typedef enum {
+    DISPLAY_ROTATION_0,
+    DISPLAY_ROTATION_180
+} display_rotation_t;
+
+// Initialize the display, rotating the rendered output based on the define passed in.
+// Returns true if the was initialized successfully
+bool st7565_init(display_rotation_t rotation);
+
+// Called at the start of st7565_init, weak function overridable by the user
+// rotation - the value passed into st7565_init
+// Return new display_rotation_t if you want to override default rotation
+display_rotation_t st7565_init_user(display_rotation_t rotation);
+
+// Clears the display buffer, resets cursor position to 0, and sets the buffer to dirty for rendering
+void st7565_clear(void);
+
+// Renders the dirty chunks of the buffer to display
+void st7565_render(void);
+
+// Moves cursor to character position indicated by column and line, wraps if out of bounds
+// Max column denoted by 'st7565_max_chars()' and max lines by 'st7565_max_lines()' functions
+void st7565_set_cursor(uint8_t col, uint8_t line);
+
+// Advances the cursor to the next page, writing ' ' if true
+// Wraps to the begining when out of bounds
+void st7565_advance_page(bool clearPageRemainder);
+
+// Moves the cursor forward 1 character length
+// Advance page if there is not enough room for the next character
+// Wraps to the begining when out of bounds
+void st7565_advance_char(void);
+
+// Writes a single character to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+// Main handler that writes character data to the display buffer
+void st7565_write_char(const char data, bool invert);
+
+// Writes a string to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+void st7565_write(const char *data, bool invert);
+
+// Writes a string to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+// Advances the cursor to the next page, wiring ' ' to the remainder of the current page
+void st7565_write_ln(const char *data, bool invert);
+
+// Pans the buffer to the right (or left by passing true) by moving contents of the buffer
+// Useful for moving the screen in preparation for new drawing
+void st7565_pan(bool left);
+
+// Returns a pointer to the requested start index in the buffer plus remaining
+// buffer length as struct
+display_buffer_reader_t st7565_read_raw(uint16_t start_index);
+
+// Writes a string to the buffer at current cursor position
+void st7565_write_raw(const char *data, uint16_t size);
+
+// Writes a single byte into the buffer at the specified index
+void st7565_write_raw_byte(const char data, uint16_t index);
+
+// Sets a specific pixel on or off
+// Coordinates start at top-left and go right and down for positive x and y
+void st7565_write_pixel(uint8_t x, uint8_t y, bool on);
+
+// Writes a PROGMEM string to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+// Remapped to call 'void st7565_write(const char *data, bool invert);' on ARM
+void st7565_write_P(const char *data, bool invert);
+
+// Writes a PROGMEM string to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+// Advances the cursor to the next page, wiring ' ' to the remainder of the current page
+// Remapped to call 'void st7565_write_ln(const char *data, bool invert);' on ARM
+void st7565_write_ln_P(const char *data, bool invert);
+
+// Writes a PROGMEM string to the buffer at current cursor position
+void st7565_write_raw_P(const char *data, uint16_t size);
+
+// Can be used to manually turn on the screen if it is off
+// Returns true if the screen was on or turns on
+bool st7565_on(void);
+
+// Called when st7565_on() turns on the screen, weak function overridable by the user
+// Not called if the screen is already on
+void st7565_on_user(void);
+
+// Can be used to manually turn off the screen if it is on
+// Returns true if the screen was off or turns off
+bool st7565_off(void);
+
+// Called when st7565_off() turns off the screen, weak function overridable by the user
+// Not called if the screen is already off
+void st7565_off_user(void);
+
+// Returns true if the screen is currently on, false if it is
+// not
+bool st7565_is_on(void);
+
+// Basically it's st7565_render, but with timeout management and st7565_task_user calling!
+void st7565_task(void);
+
+// Called at the start of st7565_task, weak function overridable by the user
+void st7565_task_user(void);
+
+// Inverts the display
+// Returns true if the screen was or is inverted
+bool st7565_invert(bool invert);
+
+// Returns the maximum number of characters that will fit on a line
+uint8_t st7565_max_chars(void);
+
+// Returns the maximum number of lines that will fit on the display
+uint8_t st7565_max_lines(void);
+```
diff --git a/drivers/avr/i2c_master.c b/drivers/avr/i2c_master.c
index b1e488529..2773e0077 100644
--- a/drivers/avr/i2c_master.c
+++ b/drivers/avr/i2c_master.c
@@ -28,8 +28,14 @@
 #    define F_SCL 400000UL  // SCL frequency
 #endif
 
+#ifndef I2C_START_RETRY_COUNT
+#    define I2C_START_RETRY_COUNT 20
+#endif  // I2C_START_RETRY_COUNT
+
 #define TWBR_val (((F_CPU / F_SCL) - 16) / 2)
 
+#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
+
 void i2c_init(void) {
     TWSR = 0; /* no prescaler */
     TWBR = (uint8_t)TWBR_val;
@@ -47,7 +53,7 @@ void i2c_init(void) {
 #endif
 }
 
-i2c_status_t i2c_start(uint8_t address, uint16_t timeout) {
+static i2c_status_t i2c_start_impl(uint8_t address, uint16_t timeout) {
     // reset TWI control register
     TWCR = 0;
     // transmit START condition
@@ -86,6 +92,17 @@ i2c_status_t i2c_start(uint8_t address, uint16_t timeout) {
     return I2C_STATUS_SUCCESS;
 }
 
+i2c_status_t i2c_start(uint8_t address, uint16_t timeout) {
+    // Retry i2c_start_impl a bunch times in case the remote side has interrupts disabled.
+    uint16_t     timeout_timer = timer_read();
+    uint16_t     time_slice    = MAX(1, (timeout == (I2C_TIMEOUT_INFINITE)) ? 5 : (timeout / (I2C_START_RETRY_COUNT)));  // if it's infinite, wait 1ms between attempts, otherwise split up the entire timeout into the number of retries
+    i2c_status_t status;
+    do {
+        status = i2c_start_impl(address, time_slice);
+    } while ((status < 0) && ((timeout == I2C_TIMEOUT_INFINITE) || (timer_elapsed(timeout_timer) < timeout)));
+    return status;
+}
+
 i2c_status_t i2c_write(uint8_t data, uint16_t timeout) {
     // load data into data register
     TWDR = data;
diff --git a/drivers/avr/i2c_slave.c b/drivers/avr/i2c_slave.c
index 62a378165..2907f164c 100644
--- a/drivers/avr/i2c_slave.c
+++ b/drivers/avr/i2c_slave.c
@@ -17,6 +17,7 @@
  * GitHub repository: https://github.com/g4lvanix/I2C-slave-lib
  */
 
+#include <stddef.h>
 #include <avr/io.h>
 #include <util/twi.h>
 #include <avr/interrupt.h>
@@ -24,6 +25,12 @@
 
 #include "i2c_slave.h"
 
+#if defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
+#    include "transactions.h"
+
+static volatile bool is_callback_executor = false;
+#endif  // defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
+
 volatile uint8_t i2c_slave_reg[I2C_SLAVE_REG_COUNT];
 
 static volatile uint8_t buffer_address;
@@ -48,11 +55,14 @@ ISR(TWI_vect) {
         case TW_SR_SLA_ACK:
             // The device is now a slave receiver
             slave_has_register_set = false;
+#if defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
+            is_callback_executor = false;
+#endif  // defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
             break;
 
         case TW_SR_DATA_ACK:
             // This device is a slave receiver and has received data
-            // First byte is the location then the bytes will be writen in buffer with auto-incriment
+            // First byte is the location then the bytes will be writen in buffer with auto-increment
             if (!slave_has_register_set) {
                 buffer_address = TWDR;
 
@@ -60,10 +70,25 @@ ISR(TWI_vect) {
                     ack            = 0;
                     buffer_address = 0;
                 }
-                slave_has_register_set = true;  // address has been receaved now fill in buffer
+                slave_has_register_set = true;  // address has been received now fill in buffer
+
+#if defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
+                // Work out if we're attempting to execute a callback
+                is_callback_executor = buffer_address == split_transaction_table[I2C_EXECUTE_CALLBACK].initiator2target_offset;
+#endif  // defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
             } else {
                 i2c_slave_reg[buffer_address] = TWDR;
                 buffer_address++;
+
+#if defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
+                // If we're intending to execute a transaction callback, do so, as we've just received the transaction ID
+                if (is_callback_executor) {
+                    split_transaction_desc_t *trans = &split_transaction_table[split_shmem->transaction_id];
+                    if (trans->slave_callback) {
+                        trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->target2initiator_buffer_size, split_trans_target2initiator_buffer(trans));
+                    }
+                }
+#endif  // defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
             }
             break;
 
diff --git a/drivers/avr/i2c_slave.h b/drivers/avr/i2c_slave.h
index 1cd0625ef..a8647c9da 100644
--- a/drivers/avr/i2c_slave.h
+++ b/drivers/avr/i2c_slave.h
@@ -22,7 +22,18 @@
 
 #pragma once
 
-#define I2C_SLAVE_REG_COUNT 30
+#ifndef I2C_SLAVE_REG_COUNT
+
+#    if defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
+#        include "transport.h"
+#        define I2C_SLAVE_REG_COUNT sizeof(split_shared_memory_t)
+#    else  // defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
+#        define I2C_SLAVE_REG_COUNT 30
+#    endif  // defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
+
+#endif  // I2C_SLAVE_REG_COUNT
+
+_Static_assert(I2C_SLAVE_REG_COUNT < 256, "I2C target registers must be single byte");
 
 extern volatile uint8_t i2c_slave_reg[I2C_SLAVE_REG_COUNT];
 
diff --git a/drivers/avr/serial.c b/drivers/avr/serial.c
index 3647bee0d..9a7345a53 100644
--- a/drivers/avr/serial.c
+++ b/drivers/avr/serial.c
@@ -224,15 +224,8 @@
 #    define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY / 2)
 
 #    define SLAVE_INT_WIDTH_US 1
-#    ifndef SERIAL_USE_MULTI_TRANSACTION
-#        define SLAVE_INT_RESPONSE_TIME SERIAL_DELAY
-#    else
-#        define SLAVE_INT_ACK_WIDTH_UNIT 2
-#        define SLAVE_INT_ACK_WIDTH 4
-#    endif
-
-static SSTD_t *Transaction_table      = NULL;
-static uint8_t Transaction_table_size = 0;
+#    define SLAVE_INT_ACK_WIDTH_UNIT 2
+#    define SLAVE_INT_ACK_WIDTH 4
 
 inline static void serial_delay(void) ALWAYS_INLINE;
 inline static void serial_delay(void) { _delay_us(SERIAL_DELAY); }
@@ -259,16 +252,12 @@ inline static void serial_low(void) { writePinLow(SOFT_SERIAL_PIN); }
 inline static void serial_high(void) ALWAYS_INLINE;
 inline static void serial_high(void) { writePinHigh(SOFT_SERIAL_PIN); }
 
-void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size) {
-    Transaction_table      = sstd_table;
-    Transaction_table_size = (uint8_t)sstd_table_size;
+void soft_serial_initiator_init(void) {
     serial_output();
     serial_high();
 }
 
-void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size) {
-    Transaction_table      = sstd_table;
-    Transaction_table_size = (uint8_t)sstd_table_size;
+void soft_serial_target_init(void) {
     serial_input_with_pullup();
 
     // Enable INT0-INT7
@@ -395,19 +384,14 @@ static inline uint8_t nibble_bits_count(uint8_t bits) {
 
 // interrupt handle to be used by the target device
 ISR(SERIAL_PIN_INTERRUPT) {
-#    ifndef SERIAL_USE_MULTI_TRANSACTION
-    serial_low();
-    serial_output();
-    SSTD_t *trans = Transaction_table;
-#    else
     // recive transaction table index
     uint8_t tid, bits;
     uint8_t pecount = 0;
     sync_recv();
-    bits = serial_read_chunk(&pecount, 7);
+    bits = serial_read_chunk(&pecount, 8);
     tid  = bits >> 3;
-    bits = (bits & 7) != nibble_bits_count(tid);
-    if (bits || pecount > 0 || tid > Transaction_table_size) {
+    bits = (bits & 7) != (nibble_bits_count(tid) & 7);
+    if (bits || pecount > 0 || tid > NUM_TOTAL_TRANSACTIONS) {
         return;
     }
     serial_delay_half1();
@@ -415,18 +399,22 @@ ISR(SERIAL_PIN_INTERRUPT) {
     serial_high();  // response step1 low->high
     serial_output();
     _delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT * SLAVE_INT_ACK_WIDTH);
-    SSTD_t *trans = &Transaction_table[tid];
+    split_transaction_desc_t *trans = &split_transaction_table[tid];
     serial_low();  // response step2 ack high->low
-#    endif
+
+    // If the transaction has a callback, we can execute it now
+    if (trans->slave_callback) {
+        trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->target2initiator_buffer_size, split_trans_target2initiator_buffer(trans));
+    }
 
     // target send phase
-    if (trans->target2initiator_buffer_size > 0) serial_send_packet((uint8_t *)trans->target2initiator_buffer, trans->target2initiator_buffer_size);
+    if (trans->target2initiator_buffer_size > 0) serial_send_packet((uint8_t *)split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size);
     // target switch to input
     change_sender2reciver();
 
     // target recive phase
     if (trans->initiator2target_buffer_size > 0) {
-        if (serial_recive_packet((uint8_t *)trans->initiator2target_buffer, trans->initiator2target_buffer_size)) {
+        if (serial_recive_packet((uint8_t *)split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size)) {
             *trans->status = TRANSACTION_ACCEPTED;
         } else {
             *trans->status = TRANSACTION_DATA_ERROR;
@@ -448,14 +436,12 @@ ISR(SERIAL_PIN_INTERRUPT) {
 //    TRANSACTION_NO_RESPONSE
 //    TRANSACTION_DATA_ERROR
 // this code is very time dependent, so we need to disable interrupts
-#    ifndef SERIAL_USE_MULTI_TRANSACTION
-int soft_serial_transaction(void) {
-    SSTD_t *trans = Transaction_table;
-#    else
 int soft_serial_transaction(int sstd_index) {
-    if (sstd_index > Transaction_table_size) return TRANSACTION_TYPE_ERROR;
-    SSTD_t *trans = &Transaction_table[sstd_index];
-#    endif
+    if (sstd_index > NUM_TOTAL_TRANSACTIONS) return TRANSACTION_TYPE_ERROR;
+    split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
+
+    if (!trans->status) return TRANSACTION_TYPE_ERROR;  // not registered
+
     cli();
 
     // signal to the target that we want to start a transaction
@@ -463,27 +449,11 @@ int soft_serial_transaction(int sstd_index) {
     serial_low();
     _delay_us(SLAVE_INT_WIDTH_US);
 
-#    ifndef SERIAL_USE_MULTI_TRANSACTION
-    // wait for the target response
-    serial_input_with_pullup();
-    _delay_us(SLAVE_INT_RESPONSE_TIME);
-
-    // check if the target is present
-    if (serial_read_pin()) {
-        // target failed to pull the line low, assume not present
-        serial_output();
-        serial_high();
-        *trans->status = TRANSACTION_NO_RESPONSE;
-        sei();
-        return TRANSACTION_NO_RESPONSE;
-    }
-
-#    else
     // send transaction table index
     int tid = (sstd_index << 3) | (7 & nibble_bits_count(sstd_index));
     sync_send();
     _delay_sub_us(TID_SEND_ADJUST);
-    serial_write_chunk(tid, 7);
+    serial_write_chunk(tid, 8);
     serial_delay_half1();
 
     // wait for the target response (step1 low->high)
@@ -504,12 +474,11 @@ int soft_serial_transaction(int sstd_index) {
         }
         _delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT);
     }
-#    endif
 
     // initiator recive phase
     // if the target is present syncronize with it
     if (trans->target2initiator_buffer_size > 0) {
-        if (!serial_recive_packet((uint8_t *)trans->target2initiator_buffer, trans->target2initiator_buffer_size)) {
+        if (!serial_recive_packet((uint8_t *)split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size)) {
             serial_output();
             serial_high();
             *trans->status = TRANSACTION_DATA_ERROR;
@@ -523,7 +492,7 @@ int soft_serial_transaction(int sstd_index) {
 
     // initiator send phase
     if (trans->initiator2target_buffer_size > 0) {
-        serial_send_packet((uint8_t *)trans->initiator2target_buffer, trans->initiator2target_buffer_size);
+        serial_send_packet((uint8_t *)split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size);
     }
 
     // always, release the line when not in use
@@ -534,9 +503,8 @@ int soft_serial_transaction(int sstd_index) {
     return TRANSACTION_END;
 }
 
-#    ifdef SERIAL_USE_MULTI_TRANSACTION
 int soft_serial_get_and_clean_status(int sstd_index) {
-    SSTD_t *trans = &Transaction_table[sstd_index];
+    split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
     cli();
     int retval     = *trans->status;
     *trans->status = 0;
@@ -544,8 +512,6 @@ int soft_serial_get_and_clean_status(int sstd_index) {
     sei();
     return retval;
 }
-#    endif
-
 #endif
 
 // Helix serial.c history
diff --git a/drivers/avr/serial.h b/drivers/avr/serial.h
deleted file mode 100644
index 53e66cf90..000000000
--- a/drivers/avr/serial.h
+++ /dev/null
@@ -1,62 +0,0 @@
-#pragma once
-
-#include <stdbool.h>
-
-// /////////////////////////////////////////////////////////////////
-// Need Soft Serial defines in config.h
-// /////////////////////////////////////////////////////////////////
-// ex.
-//  #define SOFT_SERIAL_PIN ??   // ?? = D0,D1,D2,D3,E6
-//  OPTIONAL: #define SELECT_SOFT_SERIAL_SPEED ? // ? = 1,2,3,4,5
-//                                               //  1: about 137kbps (default)
-//                                               //  2: about 75kbps
-//                                               //  3: about 39kbps
-//                                               //  4: about 26kbps
-//                                               //  5: about 20kbps
-//
-// //// USE simple API (using signle-type transaction function)
-//   /* nothing */
-// //// USE flexible API (using multi-type transaction function)
-//   #define SERIAL_USE_MULTI_TRANSACTION
-//
-// /////////////////////////////////////////////////////////////////
-
-// Soft Serial Transaction Descriptor
-typedef struct _SSTD_t {
-    uint8_t *status;
-    uint8_t  initiator2target_buffer_size;
-    uint8_t *initiator2target_buffer;
-    uint8_t  target2initiator_buffer_size;
-    uint8_t *target2initiator_buffer;
-} SSTD_t;
-#define TID_LIMIT(table) (sizeof(table) / sizeof(SSTD_t))
-
-// initiator is transaction start side
-void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size);
-// target is interrupt accept side
-void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size);
-
-// initiator resullt
-#define TRANSACTION_END 0
-#define TRANSACTION_NO_RESPONSE 0x1
-#define TRANSACTION_DATA_ERROR 0x2
-#define TRANSACTION_TYPE_ERROR 0x4
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-int soft_serial_transaction(void);
-#else
-int soft_serial_transaction(int sstd_index);
-#endif
-
-// target status
-// *SSTD_t.status has
-//   initiator:
-//       TRANSACTION_END
-//    or TRANSACTION_NO_RESPONSE
-//    or TRANSACTION_DATA_ERROR
-//   target:
-//       TRANSACTION_DATA_ERROR
-//    or TRANSACTION_ACCEPTED
-#define TRANSACTION_ACCEPTED 0x8
-#ifdef SERIAL_USE_MULTI_TRANSACTION
-int soft_serial_get_and_clean_status(int sstd_index);
-#endif
diff --git a/drivers/awinic/aw20216.c b/drivers/awinic/aw20216.c
new file mode 100644
index 000000000..269bb3a59
--- /dev/null
+++ b/drivers/awinic/aw20216.c
@@ -0,0 +1,170 @@
+/* Copyright 2021 Jasper Chan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "aw20216.h"
+#include "spi_master.h"
+
+/* The AW20216 appears to be somewhat similar to the IS31FL743, although quite
+ * a few things are different, such as the command byte format and page ordering.
+ * The LED addresses start from 0x00 instead of 0x01.
+ */
+#define AWINIC_ID 0b1010 << 4
+
+#define AW_PAGE_FUNCTION 0x00 << 1    // PG0, Function registers
+#define AW_PAGE_PWM 0x01 << 1         // PG1, LED PWM control
+#define AW_PAGE_SCALING 0x02 << 1     // PG2, LED current scaling control
+#define AW_PAGE_PATCHOICE 0x03 << 1   // PG3, Pattern choice?
+#define AW_PAGE_PWMSCALING 0x04 << 1  // PG4, LED PWM + Scaling control?
+
+#define AW_WRITE 0
+#define AW_READ 1
+
+#define AW_REG_CONFIGURATION 0x00  // PG0
+#define AW_REG_GLOBALCURRENT 0x01  // PG0
+
+// Default value of AW_REG_CONFIGURATION
+// D7:D4 = 1011, SWSEL (SW1~SW12 active)
+// D3 = 0?, reserved (apparently this should be 1 but it doesn't seem to matter)
+// D2:D1 = 00, OSDE (open/short detection enable)
+// D0 = 0, CHIPEN (write 1 to enable LEDs when hardware enable pulled high)
+#define AW_CONFIG_DEFAULT 0b10110000
+#define AW_CHIPEN 1
+
+#ifndef AW_SCALING_MAX
+#    define AW_SCALING_MAX 150
+#endif
+
+#ifndef AW_GLOBAL_CURRENT_MAX
+#    define AW_GLOBAL_CURRENT_MAX 150
+#endif
+
+#ifndef DRIVER_1_CS
+#    define DRIVER_1_CS B13
+#endif
+
+#ifndef DRIVER_1_EN
+#    define DRIVER_1_EN C13
+#endif
+
+#ifndef AW_SPI_DIVISOR
+#    define AW_SPI_DIVISOR 4
+#endif
+
+uint8_t g_spi_transfer_buffer[20] = {0};
+aw_led  g_pwm_buffer[DRIVER_LED_TOTAL];
+bool    g_pwm_buffer_update_required[DRIVER_LED_TOTAL];
+
+bool AW20216_write_register(pin_t slave_pin, uint8_t page, uint8_t reg, uint8_t data) {
+    // Do we need to call spi_stop() if this fails?
+    if (!spi_start(slave_pin, false, 0, AW_SPI_DIVISOR)) {
+        return false;
+    }
+
+    g_spi_transfer_buffer[0] = (AWINIC_ID | page | AW_WRITE);
+    g_spi_transfer_buffer[1] = reg;
+    g_spi_transfer_buffer[2] = data;
+
+    if (spi_transmit(g_spi_transfer_buffer, 3) != SPI_STATUS_SUCCESS) {
+        spi_stop();
+        return false;
+    }
+    spi_stop();
+    return true;
+}
+
+bool AW20216_init_scaling(void) {
+    // Set constant current to the max, control brightness with PWM
+    aw_led led;
+    for (uint8_t i = 0; i < DRIVER_LED_TOTAL; i++) {
+        led = g_aw_leds[i];
+        if (led.driver == 0) {
+            AW20216_write_register(DRIVER_1_CS, AW_PAGE_SCALING, led.r, AW_SCALING_MAX);
+            AW20216_write_register(DRIVER_1_CS, AW_PAGE_SCALING, led.g, AW_SCALING_MAX);
+            AW20216_write_register(DRIVER_1_CS, AW_PAGE_SCALING, led.b, AW_SCALING_MAX);
+        }
+#ifdef DRIVER_2_CS
+        else if (led.driver == 1) {
+            AW20216_write_register(DRIVER_2_CS, AW_PAGE_SCALING, led.r, AW_SCALING_MAX);
+            AW20216_write_register(DRIVER_2_CS, AW_PAGE_SCALING, led.g, AW_SCALING_MAX);
+            AW20216_write_register(DRIVER_2_CS, AW_PAGE_SCALING, led.b, AW_SCALING_MAX);
+        }
+#endif
+    }
+    return true;
+}
+
+bool AW20216_soft_enable(void) {
+    AW20216_write_register(DRIVER_1_CS, AW_PAGE_FUNCTION, AW_REG_CONFIGURATION, AW_CONFIG_DEFAULT | AW_CHIPEN);
+#ifdef DRIVER_2_CS
+    AW20216_write_register(DRIVER_2_CS, AW_PAGE_FUNCTION, AW_REG_CONFIGURATION, AW_CONFIG_DEFAULT | AW_CHIPEN);
+#endif
+    return true;
+}
+
+void AW20216_update_pwm(int index, uint8_t red, uint8_t green, uint8_t blue) {
+    aw_led led = g_aw_leds[index];
+    if (led.driver == 0) {
+        AW20216_write_register(DRIVER_1_CS, AW_PAGE_PWM, led.r, red);
+        AW20216_write_register(DRIVER_1_CS, AW_PAGE_PWM, led.g, green);
+        AW20216_write_register(DRIVER_1_CS, AW_PAGE_PWM, led.b, blue);
+    }
+#ifdef DRIVER_2_CS
+    else if (led.driver == 1) {
+        AW20216_write_register(DRIVER_2_CS, AW_PAGE_PWM, led.r, red);
+        AW20216_write_register(DRIVER_2_CS, AW_PAGE_PWM, led.g, green);
+        AW20216_write_register(DRIVER_2_CS, AW_PAGE_PWM, led.b, blue);
+    }
+#endif
+    return;
+}
+
+void AW20216_init(void) {
+    // All LEDs should start with all scaling and PWM registers as off
+    setPinOutput(DRIVER_1_EN);
+    writePinHigh(DRIVER_1_EN);
+    AW20216_write_register(DRIVER_1_CS, AW_PAGE_FUNCTION, AW_REG_GLOBALCURRENT, AW_GLOBAL_CURRENT_MAX);
+#ifdef DRIVER_2_EN
+    setPinOutput(DRIVER_2_EN);
+    writePinHigh(DRIVER_2_EN);
+    AW20216_write_register(DRIVER_2_CS, AW_PAGE_FUNCTION, AW_REG_GLOBALCURRENT, AW_GLOBAL_CURRENT_MAX);
+#endif
+    AW20216_init_scaling();
+    AW20216_soft_enable();
+    return;
+}
+
+void AW20216_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
+    g_pwm_buffer[index].r               = red;
+    g_pwm_buffer[index].g               = green;
+    g_pwm_buffer[index].b               = blue;
+    g_pwm_buffer_update_required[index] = true;
+    return;
+}
+void AW20216_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
+    for (uint8_t i = 0; i < DRIVER_LED_TOTAL; i++) {
+        AW20216_set_color(i, red, green, blue);
+    }
+    return;
+}
+void AW20216_update_pwm_buffers(void) {
+    for (uint8_t i = 0; i < DRIVER_LED_TOTAL; i++) {
+        if (g_pwm_buffer_update_required[i]) {
+            AW20216_update_pwm(i, g_pwm_buffer[i].r, g_pwm_buffer[i].g, g_pwm_buffer[i].b);
+            g_pwm_buffer_update_required[i] = false;
+        }
+    }
+    return;
+}
diff --git a/drivers/awinic/aw20216.h b/drivers/awinic/aw20216.h
new file mode 100644
index 000000000..9c6865cc8
--- /dev/null
+++ b/drivers/awinic/aw20216.h
@@ -0,0 +1,251 @@
+/* Copyright 2021 Jasper Chan (Gigahawk)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef struct aw_led {
+    uint8_t driver : 2;
+    uint8_t r;
+    uint8_t g;
+    uint8_t b;
+} aw_led;
+
+extern const aw_led g_aw_leds[DRIVER_LED_TOTAL];
+
+void AW20216_init(void);
+void AW20216_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
+void AW20216_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
+void AW20216_update_pwm_buffers(void);
+
+#define CS1_SW1 0x00
+#define CS2_SW1 0x01
+#define CS3_SW1 0x02
+#define CS4_SW1 0x03
+#define CS5_SW1 0x04
+#define CS6_SW1 0x05
+#define CS7_SW1 0x06
+#define CS8_SW1 0x07
+#define CS9_SW1 0x08
+#define CS10_SW1 0x09
+#define CS11_SW1 0x0A
+#define CS12_SW1 0x0B
+#define CS13_SW1 0x0C
+#define CS14_SW1 0x0D
+#define CS15_SW1 0x0E
+#define CS16_SW1 0x0F
+#define CS17_SW1 0x10
+#define CS18_SW1 0x11
+#define CS1_SW2 0x12
+#define CS2_SW2 0x13
+#define CS3_SW2 0x14
+#define CS4_SW2 0x15
+#define CS5_SW2 0x16
+#define CS6_SW2 0x17
+#define CS7_SW2 0x18
+#define CS8_SW2 0x19
+#define CS9_SW2 0x1A
+#define CS10_SW2 0x1B
+#define CS11_SW2 0x1C
+#define CS12_SW2 0x1D
+#define CS13_SW2 0x1E
+#define CS14_SW2 0x1F
+#define CS15_SW2 0x20
+#define CS16_SW2 0x21
+#define CS17_SW2 0x22
+#define CS18_SW2 0x23
+#define CS1_SW3 0x24
+#define CS2_SW3 0x25
+#define CS3_SW3 0x26
+#define CS4_SW3 0x27
+#define CS5_SW3 0x28
+#define CS6_SW3 0x29
+#define CS7_SW3 0x2A
+#define CS8_SW3 0x2B
+#define CS9_SW3 0x2C
+#define CS10_SW3 0x2D
+#define CS11_SW3 0x2E
+#define CS12_SW3 0x2F
+#define CS13_SW3 0x30
+#define CS14_SW3 0x31
+#define CS15_SW3 0x32
+#define CS16_SW3 0x33
+#define CS17_SW3 0x34
+#define CS18_SW3 0x35
+#define CS1_SW4 0x36
+#define CS2_SW4 0x37
+#define CS3_SW4 0x38
+#define CS4_SW4 0x39
+#define CS5_SW4 0x3A
+#define CS6_SW4 0x3B
+#define CS7_SW4 0x3C
+#define CS8_SW4 0x3D
+#define CS9_SW4 0x3E
+#define CS10_SW4 0x3F
+#define CS11_SW4 0x40
+#define CS12_SW4 0x41
+#define CS13_SW4 0x42
+#define CS14_SW4 0x43
+#define CS15_SW4 0x44
+#define CS16_SW4 0x45
+#define CS17_SW4 0x46
+#define CS18_SW4 0x47
+#define CS1_SW5 0x48
+#define CS2_SW5 0x49
+#define CS3_SW5 0x4A
+#define CS4_SW5 0x4B
+#define CS5_SW5 0x4C
+#define CS6_SW5 0x4D
+#define CS7_SW5 0x4E
+#define CS8_SW5 0x4F
+#define CS9_SW5 0x50
+#define CS10_SW5 0x51
+#define CS11_SW5 0x52
+#define CS12_SW5 0x53
+#define CS13_SW5 0x54
+#define CS14_SW5 0x55
+#define CS15_SW5 0x56
+#define CS16_SW5 0x57
+#define CS17_SW5 0x58
+#define CS18_SW5 0x59
+#define CS1_SW6 0x5A
+#define CS2_SW6 0x5B
+#define CS3_SW6 0x5C
+#define CS4_SW6 0x5D
+#define CS5_SW6 0x5E
+#define CS6_SW6 0x5F
+#define CS7_SW6 0x60
+#define CS8_SW6 0x61
+#define CS9_SW6 0x62
+#define CS10_SW6 0x63
+#define CS11_SW6 0x64
+#define CS12_SW6 0x65
+#define CS13_SW6 0x66
+#define CS14_SW6 0x67
+#define CS15_SW6 0x68
+#define CS16_SW6 0x69
+#define CS17_SW6 0x6A
+#define CS18_SW6 0x6B
+#define CS1_SW7 0x6C
+#define CS2_SW7 0x6D
+#define CS3_SW7 0x6E
+#define CS4_SW7 0x6F
+#define CS5_SW7 0x70
+#define CS6_SW7 0x71
+#define CS7_SW7 0x72
+#define CS8_SW7 0x73
+#define CS9_SW7 0x74
+#define CS10_SW7 0x75
+#define CS11_SW7 0x76
+#define CS12_SW7 0x77
+#define CS13_SW7 0x78
+#define CS14_SW7 0x79
+#define CS15_SW7 0x7A
+#define CS16_SW7 0x7B
+#define CS17_SW7 0x7C
+#define CS18_SW7 0x7D
+#define CS1_SW8 0x7E
+#define CS2_SW8 0x7F
+#define CS3_SW8 0x80
+#define CS4_SW8 0x81
+#define CS5_SW8 0x82
+#define CS6_SW8 0x83
+#define CS7_SW8 0x84
+#define CS8_SW8 0x85
+#define CS9_SW8 0x86
+#define CS10_SW8 0x87
+#define CS11_SW8 0x88
+#define CS12_SW8 0x89
+#define CS13_SW8 0x8A
+#define CS14_SW8 0x8B
+#define CS15_SW8 0x8C
+#define CS16_SW8 0x8D
+#define CS17_SW8 0x8E
+#define CS18_SW8 0x8F
+#define CS1_SW9 0x90
+#define CS2_SW9 0x91
+#define CS3_SW9 0x92
+#define CS4_SW9 0x93
+#define CS5_SW9 0x94
+#define CS6_SW9 0x95
+#define CS7_SW9 0x96
+#define CS8_SW9 0x97
+#define CS9_SW9 0x98
+#define CS10_SW9 0x99
+#define CS11_SW9 0x9A
+#define CS12_SW9 0x9B
+#define CS13_SW9 0x9C
+#define CS14_SW9 0x9D
+#define CS15_SW9 0x9E
+#define CS16_SW9 0x9F
+#define CS17_SW9 0xA0
+#define CS18_SW9 0xA1
+#define CS1_SW10 0xA2
+#define CS2_SW10 0xA3
+#define CS3_SW10 0xA4
+#define CS4_SW10 0xA5
+#define CS5_SW10 0xA6
+#define CS6_SW10 0xA7
+#define CS7_SW10 0xA8
+#define CS8_SW10 0xA9
+#define CS9_SW10 0xAA
+#define CS10_SW10 0xAB
+#define CS11_SW10 0xAC
+#define CS12_SW10 0xAD
+#define CS13_SW10 0xAE
+#define CS14_SW10 0xAF
+#define CS15_SW10 0xB0
+#define CS16_SW10 0xB1
+#define CS17_SW10 0xB2
+#define CS18_SW10 0xB3
+#define CS1_SW11 0xB4
+#define CS2_SW11 0xB5
+#define CS3_SW11 0xB6
+#define CS4_SW11 0xB7
+#define CS5_SW11 0xB8
+#define CS6_SW11 0xB9
+#define CS7_SW11 0xBA
+#define CS8_SW11 0xBB
+#define CS9_SW11 0xBC
+#define CS10_SW11 0xBD
+#define CS11_SW11 0xBE
+#define CS12_SW11 0xBF
+#define CS13_SW11 0xC0
+#define CS14_SW11 0xC1
+#define CS15_SW11 0xC2
+#define CS16_SW11 0xC3
+#define CS17_SW11 0xC4
+#define CS18_SW11 0xC5
+#define CS1_SW12 0xC6
+#define CS2_SW12 0xC7
+#define CS3_SW12 0xC8
+#define CS4_SW12 0xC9
+#define CS5_SW12 0xCA
+#define CS6_SW12 0xCB
+#define CS7_SW12 0xCC
+#define CS8_SW12 0xCD
+#define CS9_SW12 0xCE
+#define CS10_SW12 0xCF
+#define CS11_SW12 0xD0
+#define CS12_SW12 0xD1
+#define CS13_SW12 0xD2
+#define CS14_SW12 0xD3
+#define CS15_SW12 0xD4
+#define CS16_SW12 0xD5
+#define CS17_SW12 0xD6
+#define CS18_SW12 0xD7
diff --git a/drivers/chibios/serial.c b/drivers/chibios/serial.c
index 54f7e1321..f54fbcee4 100644
--- a/drivers/chibios/serial.c
+++ b/drivers/chibios/serial.c
@@ -74,21 +74,12 @@ static THD_FUNCTION(Thread1, arg) {
     }
 }
 
-static SSTD_t *Transaction_table      = NULL;
-static uint8_t Transaction_table_size = 0;
-
-void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size) {
-    Transaction_table      = sstd_table;
-    Transaction_table_size = (uint8_t)sstd_table_size;
-
+void soft_serial_initiator_init(void) {
     serial_output();
     serial_high();
 }
 
-void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size) {
-    Transaction_table      = sstd_table;
-    Transaction_table_size = (uint8_t)sstd_table_size;
-
+void soft_serial_target_init(void) {
     serial_input();
 
     palEnablePadEvent(PAL_PORT(SOFT_SERIAL_PIN), PAL_PAD(SOFT_SERIAL_PIN), PAL_EVENT_MODE_FALLING_EDGE);
@@ -154,16 +145,14 @@ void interrupt_handler(void *arg) {
     uint8_t checksum_computed = 0;
     int     sstd_index        = 0;
 
-#ifdef SERIAL_USE_MULTI_TRANSACTION
     sstd_index = serial_read_byte();
     sync_send();
-#endif
 
-    SSTD_t *trans = &Transaction_table[sstd_index];
+    split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
     for (int i = 0; i < trans->initiator2target_buffer_size; ++i) {
-        trans->initiator2target_buffer[i] = serial_read_byte();
+        split_trans_initiator2target_buffer(trans)[i] = serial_read_byte();
         sync_send();
-        checksum_computed += trans->initiator2target_buffer[i];
+        checksum_computed += split_trans_initiator2target_buffer(trans)[i];
     }
     checksum_computed ^= 7;
     uint8_t checksum_received = serial_read_byte();
@@ -172,12 +161,17 @@ void interrupt_handler(void *arg) {
     // wait for the sync to finish sending
     serial_delay();
 
+    // Allow any slave processing to occur
+    if (trans->slave_callback) {
+        trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->target2initiator_buffer_size, split_trans_target2initiator_buffer(trans));
+    }
+
     uint8_t checksum = 0;
     for (int i = 0; i < trans->target2initiator_buffer_size; ++i) {
-        serial_write_byte(trans->target2initiator_buffer[i]);
+        serial_write_byte(split_trans_target2initiator_buffer(trans)[i]);
         sync_send();
         serial_delay_half();
-        checksum += trans->target2initiator_buffer[i];
+        checksum += split_trans_target2initiator_buffer(trans)[i];
     }
     serial_write_byte(checksum ^ 7);
     sync_send();
@@ -206,15 +200,10 @@ void interrupt_handler(void *arg) {
 //    TRANSACTION_NO_RESPONSE
 //    TRANSACTION_DATA_ERROR
 // this code is very time dependent, so we need to disable interrupts
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-int soft_serial_transaction(void) {
-    int sstd_index = 0;
-#else
 int soft_serial_transaction(int sstd_index) {
-#endif
-
-    if (sstd_index > Transaction_table_size) return TRANSACTION_TYPE_ERROR;
-    SSTD_t *trans = &Transaction_table[sstd_index];
+    if (sstd_index > NUM_TOTAL_TRANSACTIONS) return TRANSACTION_TYPE_ERROR;
+    split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
+    if (!trans->status) return TRANSACTION_TYPE_ERROR;  // not registered
 
     // TODO: remove extra delay between transactions
     serial_delay();
@@ -244,14 +233,13 @@ int soft_serial_transaction(int sstd_index) {
 
     uint8_t checksum = 0;
     // send data to the slave
-#ifdef SERIAL_USE_MULTI_TRANSACTION
     serial_write_byte(sstd_index);  // first chunk is transaction id
     sync_recv();
-#endif
+
     for (int i = 0; i < trans->initiator2target_buffer_size; ++i) {
-        serial_write_byte(trans->initiator2target_buffer[i]);
+        serial_write_byte(split_trans_initiator2target_buffer(trans)[i]);
         sync_recv();
-        checksum += trans->initiator2target_buffer[i];
+        checksum += split_trans_initiator2target_buffer(trans)[i];
     }
     serial_write_byte(checksum ^ 7);
     sync_recv();
@@ -262,9 +250,9 @@ int soft_serial_transaction(int sstd_index) {
     // receive data from the slave
     uint8_t checksum_computed = 0;
     for (int i = 0; i < trans->target2initiator_buffer_size; ++i) {
-        trans->target2initiator_buffer[i] = serial_read_byte();
+        split_trans_target2initiator_buffer(trans)[i] = serial_read_byte();
         sync_recv();
-        checksum_computed += trans->target2initiator_buffer[i];
+        checksum_computed += split_trans_target2initiator_buffer(trans)[i];
     }
     checksum_computed ^= 7;
     uint8_t checksum_received = serial_read_byte();
diff --git a/drivers/chibios/serial.h b/drivers/chibios/serial.h
deleted file mode 100644
index 0c1857d52..000000000
--- a/drivers/chibios/serial.h
+++ /dev/null
@@ -1,62 +0,0 @@
-#pragma once
-
-#include <stdbool.h>
-
-// /////////////////////////////////////////////////////////////////
-// Need Soft Serial defines in config.h
-// /////////////////////////////////////////////////////////////////
-// ex.
-//  #define SOFT_SERIAL_PIN ??   // ?? = D0,D1,D2,D3,E6
-//  OPTIONAL: #define SELECT_SOFT_SERIAL_SPEED ? // ? = 1,2,3,4,5
-//                                               //  1: about 137kbps (default)
-//                                               //  2: about 75kbps
-//                                               //  3: about 39kbps
-//                                               //  4: about 26kbps
-//                                               //  5: about 20kbps
-//
-// //// USE simple API (using signle-type transaction function)
-//   /* nothing */
-// //// USE flexible API (using multi-type transaction function)
-//   #define SERIAL_USE_MULTI_TRANSACTION
-//
-// /////////////////////////////////////////////////////////////////
-
-// Soft Serial Transaction Descriptor
-typedef struct _SSTD_t {
-    uint8_t *status;
-    uint8_t  initiator2target_buffer_size;
-    uint8_t *initiator2target_buffer;
-    uint8_t  target2initiator_buffer_size;
-    uint8_t *target2initiator_buffer;
-} SSTD_t;
-#define TID_LIMIT(table) (sizeof(table) / sizeof(SSTD_t))
-
-// initiator is transaction start side
-void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size);
-// target is interrupt accept side
-void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size);
-
-// initiator result
-#define TRANSACTION_END 0
-#define TRANSACTION_NO_RESPONSE 0x1
-#define TRANSACTION_DATA_ERROR 0x2
-#define TRANSACTION_TYPE_ERROR 0x4
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-int soft_serial_transaction(void);
-#else
-int soft_serial_transaction(int sstd_index);
-#endif
-
-// target status
-// *SSTD_t.status has
-//   initiator:
-//       TRANSACTION_END
-//    or TRANSACTION_NO_RESPONSE
-//    or TRANSACTION_DATA_ERROR
-//   target:
-//       TRANSACTION_DATA_ERROR
-//    or TRANSACTION_ACCEPTED
-#define TRANSACTION_ACCEPTED 0x8
-#ifdef SERIAL_USE_MULTI_TRANSACTION
-int soft_serial_get_and_clean_status(int sstd_index);
-#endif
diff --git a/drivers/chibios/serial_usart.c b/drivers/chibios/serial_usart.c
index cae29388c..9f180d2d7 100644
--- a/drivers/chibios/serial_usart.c
+++ b/drivers/chibios/serial_usart.c
@@ -113,37 +113,29 @@ void usart_slave_init(void) {
     chThdCreateStatic(waSlaveThread, sizeof(waSlaveThread), HIGHPRIO, SlaveThread, NULL);
 }
 
-static SSTD_t* Transaction_table      = NULL;
-static uint8_t Transaction_table_size = 0;
+void soft_serial_initiator_init(void) { usart_master_init(); }
 
-void soft_serial_initiator_init(SSTD_t* sstd_table, int sstd_table_size) {
-    Transaction_table      = sstd_table;
-    Transaction_table_size = (uint8_t)sstd_table_size;
-
-    usart_master_init();
-}
-
-void soft_serial_target_init(SSTD_t* sstd_table, int sstd_table_size) {
-    Transaction_table      = sstd_table;
-    Transaction_table_size = (uint8_t)sstd_table_size;
-
-    usart_slave_init();
-}
+void soft_serial_target_init(void) { usart_slave_init(); }
 
 void handle_soft_serial_slave(void) {
-    uint8_t sstd_index = sdGet(&SERIAL_USART_DRIVER);  // first chunk is always transaction id
-    SSTD_t* trans      = &Transaction_table[sstd_index];
+    uint8_t                   sstd_index = sdGet(&SERIAL_USART_DRIVER);  // first chunk is always transaction id
+    split_transaction_desc_t* trans      = &split_transaction_table[sstd_index];
 
     // Always write back the sstd_index as part of a basic handshake
     sstd_index ^= HANDSHAKE_MAGIC;
     sdWrite(&SERIAL_USART_DRIVER, &sstd_index, sizeof(sstd_index));
 
     if (trans->initiator2target_buffer_size) {
-        sdRead(&SERIAL_USART_DRIVER, trans->initiator2target_buffer, trans->initiator2target_buffer_size);
+        sdRead(&SERIAL_USART_DRIVER, split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size);
+    }
+
+    // Allow any slave processing to occur
+    if (trans->slave_callback) {
+        trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->target2initiator_buffer_size, split_trans_target2initiator_buffer(trans));
     }
 
     if (trans->target2initiator_buffer_size) {
-        sdWrite(&SERIAL_USART_DRIVER, trans->target2initiator_buffer, trans->target2initiator_buffer_size);
+        sdWrite(&SERIAL_USART_DRIVER, split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size);
     }
 
     if (trans->status) {
@@ -160,17 +152,14 @@ void handle_soft_serial_slave(void) {
 //    TRANSACTION_END
 //    TRANSACTION_NO_RESPONSE
 //    TRANSACTION_DATA_ERROR
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-int soft_serial_transaction(void) {
-    uint8_t sstd_index = 0;
-#else
 int soft_serial_transaction(int index) {
     uint8_t sstd_index = index;
-#endif
 
-    if (sstd_index > Transaction_table_size) return TRANSACTION_TYPE_ERROR;
-    SSTD_t* trans = &Transaction_table[sstd_index];
-    msg_t   res   = 0;
+    if (sstd_index > NUM_TOTAL_TRANSACTIONS) return TRANSACTION_TYPE_ERROR;
+    split_transaction_desc_t* trans = &split_transaction_table[sstd_index];
+    msg_t                     res   = 0;
+
+    if (!trans->status) return TRANSACTION_TYPE_ERROR;  // not registered
 
     sdClear(&SERIAL_USART_DRIVER);
 
@@ -189,7 +178,7 @@ int soft_serial_transaction(int index) {
     }
 
     if (trans->initiator2target_buffer_size) {
-        res = sdWriteTimeout(&SERIAL_USART_DRIVER, trans->initiator2target_buffer, trans->initiator2target_buffer_size, TIME_MS2I(SERIAL_USART_TIMEOUT));
+        res = sdWriteTimeout(&SERIAL_USART_DRIVER, split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size, TIME_MS2I(SERIAL_USART_TIMEOUT));
         if (res < 0) {
             dprintf("serial::usart_transmit NO_RESPONSE\n");
             return TRANSACTION_NO_RESPONSE;
@@ -197,7 +186,7 @@ int soft_serial_transaction(int index) {
     }
 
     if (trans->target2initiator_buffer_size) {
-        res = sdReadTimeout(&SERIAL_USART_DRIVER, trans->target2initiator_buffer, trans->target2initiator_buffer_size, TIME_MS2I(SERIAL_USART_TIMEOUT));
+        res = sdReadTimeout(&SERIAL_USART_DRIVER, split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size, TIME_MS2I(SERIAL_USART_TIMEOUT));
         if (res < 0) {
             dprintf("serial::usart_receive NO_RESPONSE\n");
             return TRANSACTION_NO_RESPONSE;
diff --git a/drivers/chibios/spi_master.c b/drivers/chibios/spi_master.c
index 4852a6eba..28ddcbb2b 100644
--- a/drivers/chibios/spi_master.c
+++ b/drivers/chibios/spi_master.c
@@ -18,8 +18,13 @@
 
 #include "timer.h"
 
-static pin_t     currentSlavePin = NO_PIN;
-static SPIConfig spiConfig       = {false, NULL, 0, 0, 0, 0};
+static pin_t currentSlavePin = NO_PIN;
+
+#if defined(K20x) || defined(KL2x)
+static SPIConfig spiConfig = {NULL, 0, 0, 0};
+#else
+static SPIConfig spiConfig = {false, NULL, 0, 0, 0, 0};
+#endif
 
 __attribute__((weak)) void spi_init(void) {
     static bool is_initialised = false;
@@ -27,15 +32,15 @@ __attribute__((weak)) void spi_init(void) {
         is_initialised = true;
 
         // Try releasing special pins for a short time
-        palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), PAL_MODE_INPUT);
-        palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), PAL_MODE_INPUT);
-        palSetPadMode(PAL_PORT(SPI_MISO_PIN), PAL_PAD(SPI_MISO_PIN), PAL_MODE_INPUT);
+        setPinInput(SPI_SCK_PIN);
+        setPinInput(SPI_MOSI_PIN);
+        setPinInput(SPI_MISO_PIN);
 
         chThdSleepMilliseconds(10);
 #if defined(USE_GPIOV1)
-        palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), PAL_MODE_STM32_ALTERNATE_PUSHPULL);
-        palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), PAL_MODE_STM32_ALTERNATE_PUSHPULL);
-        palSetPadMode(PAL_PORT(SPI_MISO_PIN), PAL_PAD(SPI_MISO_PIN), PAL_MODE_STM32_ALTERNATE_PUSHPULL);
+        palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), SPI_SCK_PAL_MODE);
+        palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), SPI_MOSI_PAL_MODE);
+        palSetPadMode(PAL_PORT(SPI_MISO_PIN), PAL_PAD(SPI_MISO_PIN), SPI_MISO_PAL_MODE);
 #else
         palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), PAL_MODE_ALTERNATE(SPI_SCK_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
         palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), PAL_MODE_ALTERNATE(SPI_MOSI_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
@@ -58,6 +63,54 @@ bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) {
         return false;
     }
 
+#if defined(K20x) || defined(KL2x)
+    spiConfig.tar0 = SPIx_CTARn_FMSZ(7) | SPIx_CTARn_ASC(1);
+
+    if (lsbFirst) {
+        spiConfig.tar0 |= SPIx_CTARn_LSBFE;
+    }
+
+    switch (mode) {
+        case 0:
+            break;
+        case 1:
+            spiConfig.tar0 |= SPIx_CTARn_CPHA;
+            break;
+        case 2:
+            spiConfig.tar0 |= SPIx_CTARn_CPOL;
+            break;
+        case 3:
+            spiConfig.tar0 |= SPIx_CTARn_CPHA | SPIx_CTARn_CPOL;
+            break;
+    }
+
+    switch (roundedDivisor) {
+        case 2:
+            spiConfig.tar0 |= SPIx_CTARn_BR(0);
+            break;
+        case 4:
+            spiConfig.tar0 |= SPIx_CTARn_BR(1);
+            break;
+        case 8:
+            spiConfig.tar0 |= SPIx_CTARn_BR(3);
+            break;
+        case 16:
+            spiConfig.tar0 |= SPIx_CTARn_BR(4);
+            break;
+        case 32:
+            spiConfig.tar0 |= SPIx_CTARn_BR(5);
+            break;
+        case 64:
+            spiConfig.tar0 |= SPIx_CTARn_BR(6);
+            break;
+        case 128:
+            spiConfig.tar0 |= SPIx_CTARn_BR(7);
+            break;
+        case 256:
+            spiConfig.tar0 |= SPIx_CTARn_BR(8);
+            break;
+    }
+#else
     spiConfig.cr1 = 0;
 
     if (lsbFirst) {
@@ -103,6 +156,7 @@ bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) {
             spiConfig.cr1 |= SPI_CR1_BR_2 | SPI_CR1_BR_1 | SPI_CR1_BR_0;
             break;
     }
+#endif
 
     currentSlavePin  = slavePin;
     spiConfig.ssport = PAL_PORT(slavePin);
diff --git a/drivers/chibios/spi_master.h b/drivers/chibios/spi_master.h
index e93580e31..b5a6ef143 100644
--- a/drivers/chibios/spi_master.h
+++ b/drivers/chibios/spi_master.h
@@ -21,6 +21,7 @@
 #include <stdbool.h>
 
 #include "gpio.h"
+#include "chibios_config.h"
 
 #ifndef SPI_DRIVER
 #    define SPI_DRIVER SPID2
@@ -31,7 +32,11 @@
 #endif
 
 #ifndef SPI_SCK_PAL_MODE
-#    define SPI_SCK_PAL_MODE 5
+#    if defined(USE_GPIOV1)
+#        define SPI_SCK_PAL_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+#    else
+#        define SPI_SCK_PAL_MODE 5
+#    endif
 #endif
 
 #ifndef SPI_MOSI_PIN
@@ -39,7 +44,11 @@
 #endif
 
 #ifndef SPI_MOSI_PAL_MODE
-#    define SPI_MOSI_PAL_MODE 5
+#    if defined(USE_GPIOV1)
+#        define SPI_MOSI_PAL_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+#    else
+#        define SPI_MOSI_PAL_MODE 5
+#    endif
 #endif
 
 #ifndef SPI_MISO_PIN
@@ -47,7 +56,11 @@
 #endif
 
 #ifndef SPI_MISO_PAL_MODE
-#    define SPI_MISO_PAL_MODE 5
+#    if defined(USE_GPIOV1)
+#        define SPI_MISO_PAL_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+#    else
+#        define SPI_MISO_PAL_MODE 5
+#    endif
 #endif
 
 typedef int16_t spi_status_t;
diff --git a/drivers/eeprom/eeprom_i2c.c b/drivers/eeprom/eeprom_i2c.c
index 4210f06f9..8e80ff544 100644
--- a/drivers/eeprom/eeprom_i2c.c
+++ b/drivers/eeprom/eeprom_i2c.c
@@ -16,6 +16,9 @@
 
 #include <stdint.h>
 #include <string.h>
+#if defined(EXTERNAL_EEPROM_WP_PIN)
+#    include "gpio.h"
+#endif
 
 /*
     Note that the implementations of eeprom_XXXX_YYYY on AVR are normally
@@ -50,7 +53,14 @@ static inline void fill_target_address(uint8_t *buffer, const void *addr) {
     }
 }
 
-void eeprom_driver_init(void) { i2c_init(); }
+void eeprom_driver_init(void) {
+    i2c_init();
+#if defined(EXTERNAL_EEPROM_WP_PIN)
+    /* We are setting the WP pin to high in a way that requires at least two bit-flips to change back to 0 */
+    writePin(EXTERNAL_EEPROM_WP_PIN, 1);
+    setPinInputHigh(EXTERNAL_EEPROM_WP_PIN);
+#endif
+}
 
 void eeprom_driver_erase(void) {
 #if defined(CONSOLE_ENABLE) && defined(DEBUG_EEPROM_OUTPUT)
@@ -89,6 +99,11 @@ void eeprom_write_block(const void *buf, void *addr, size_t len) {
     uint8_t * read_buf    = (uint8_t *)buf;
     uintptr_t target_addr = (uintptr_t)addr;
 
+#if defined(EXTERNAL_EEPROM_WP_PIN)
+    setPinOutput(EXTERNAL_EEPROM_WP_PIN);
+    writePin(EXTERNAL_EEPROM_WP_PIN, 0);
+#endif
+
     while (len > 0) {
         uintptr_t page_offset  = target_addr % EXTERNAL_EEPROM_PAGE_SIZE;
         int       write_length = EXTERNAL_EEPROM_PAGE_SIZE - page_offset;
@@ -116,4 +131,10 @@ void eeprom_write_block(const void *buf, void *addr, size_t len) {
         target_addr += write_length;
         len -= write_length;
     }
+
+#if defined(EXTERNAL_EEPROM_WP_PIN)
+    /* We are setting the WP pin to high in a way that requires at least two bit-flips to change back to 0 */
+    writePin(EXTERNAL_EEPROM_WP_PIN, 1);
+    setPinInputHigh(EXTERNAL_EEPROM_WP_PIN);
+#endif
 }
diff --git a/drivers/haptic/haptic.c b/drivers/haptic/haptic.c
index de3f40052..3fab1be1a 100644
--- a/drivers/haptic/haptic.c
+++ b/drivers/haptic/haptic.c
@@ -291,6 +291,73 @@ void haptic_play(void) {
 #endif
 }
 
+__attribute__((weak)) bool get_haptic_enabled_key(uint16_t keycode, keyrecord_t *record) {
+    switch(keycode) {
+#    ifdef NO_HAPTIC_MOD
+        case QK_MOD_TAP ... QK_MOD_TAP_MAX:
+            if (record->tap.count == 0) return false;
+            break;
+        case QK_LAYER_TAP_TOGGLE ... QK_LAYER_TAP_TOGGLE_MAX:
+            if (record->tap.count != TAPPING_TOGGLE) return false;
+            break;
+        case QK_LAYER_TAP ... QK_LAYER_TAP_MAX:
+            if (record->tap.count == 0) return false;
+            break;
+        case KC_LCTRL ... KC_RGUI:
+        case QK_MOMENTARY ... QK_MOMENTARY_MAX:
+#    endif
+#    ifdef NO_HAPTIC_FN
+        case KC_FN0 ... KC_FN31:
+#    endif
+#    ifdef NO_HAPTIC_ALPHA
+        case KC_A ... KC_Z:
+#    endif
+#    ifdef NO_HAPTIC_PUNCTUATION
+        case KC_ENTER:
+        case KC_ESCAPE:
+        case KC_BSPACE:
+        case KC_SPACE:
+        case KC_MINUS:
+        case KC_EQUAL:
+        case KC_LBRACKET:
+        case KC_RBRACKET:
+        case KC_BSLASH:
+        case KC_NONUS_HASH:
+        case KC_SCOLON:
+        case KC_QUOTE:
+        case KC_GRAVE:
+        case KC_COMMA:
+        case KC_SLASH:
+        case KC_DOT:
+        case KC_NONUS_BSLASH:
+#    endif
+#    ifdef NO_HAPTIC_LOCKKEYS
+        case KC_CAPSLOCK:
+        case KC_SCROLLLOCK:
+        case KC_NUMLOCK:
+#    endif
+#    ifdef NO_HAPTIC_NAV
+        case KC_PSCREEN:
+        case KC_PAUSE:
+        case KC_INSERT:
+        case KC_DELETE:
+        case KC_PGDOWN:
+        case KC_PGUP:
+        case KC_LEFT:
+        case KC_UP:
+        case KC_RIGHT:
+        case KC_DOWN:
+        case KC_END:
+        case KC_HOME:
+#    endif
+#    ifdef NO_HAPTIC_NUMERIC
+        case KC_1 ... KC_0:
+#    endif
+         return false;
+    }
+    return true;
+}
+
 bool process_haptic(uint16_t keycode, keyrecord_t *record) {
     if (keycode == HPT_ON && record->event.pressed) {
         haptic_enable();
@@ -335,12 +402,12 @@ bool process_haptic(uint16_t keycode, keyrecord_t *record) {
     if (haptic_config.enable) {
         if (record->event.pressed) {
             // keypress
-            if (haptic_config.feedback < 2) {
+            if (haptic_config.feedback < 2 && get_haptic_enabled_key(keycode, record)) {
                 haptic_play();
             }
         } else {
             // keyrelease
-            if (haptic_config.feedback > 0) {
+            if (haptic_config.feedback > 0 && get_haptic_enabled_key(keycode, record)) {
                 haptic_play();
             }
         }
diff --git a/drivers/lcd/st7565.c b/drivers/lcd/st7565.c
new file mode 100644
index 000000000..49b13c00f
--- /dev/null
+++ b/drivers/lcd/st7565.c
@@ -0,0 +1,496 @@
+/*
+Copyright 2021
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "st7565.h"
+
+#include <string.h>
+
+#include "keyboard.h"
+#include "progmem.h"
+#include "timer.h"
+#include "wait.h"
+
+#include ST7565_FONT_H
+
+// Fundamental Commands
+#define CONTRAST 0x81
+#define DISPLAY_ALL_ON 0xA5
+#define DISPLAY_ALL_ON_RESUME 0xA4
+#define NORMAL_DISPLAY 0xA6
+#define INVERT_DISPLAY 0xA7
+#define DISPLAY_ON 0xAF
+#define DISPLAY_OFF 0xAE
+#define NOP 0xE3
+
+// Addressing Setting Commands
+#define PAM_SETCOLUMN_LSB 0x00
+#define PAM_SETCOLUMN_MSB 0x10
+#define PAM_PAGE_ADDR 0xB0  // 0xb0 -- 0xb7
+
+// Hardware Configuration Commands
+#define DISPLAY_START_LINE 0x40
+#define SEGMENT_REMAP 0xA0
+#define SEGMENT_REMAP_INV 0xA1
+#define COM_SCAN_INC 0xC0
+#define COM_SCAN_DEC 0xC8
+#define LCD_BIAS_7 0xA3
+#define LCD_BIAS_9 0xA2
+#define RESISTOR_RATIO 0x20
+#define POWER_CONTROL 0x28
+
+// Misc defines
+#ifndef ST7565_BLOCK_COUNT
+#    define ST7565_BLOCK_COUNT (sizeof(ST7565_BLOCK_TYPE) * 8)
+#endif
+#ifndef ST7565_BLOCK_SIZE
+#    define ST7565_BLOCK_SIZE (ST7565_MATRIX_SIZE / ST7565_BLOCK_COUNT)
+#endif
+
+#define ST7565_ALL_BLOCKS_MASK (((((ST7565_BLOCK_TYPE)1 << (ST7565_BLOCK_COUNT - 1)) - 1) << 1) | 1)
+
+#define HAS_FLAGS(bits, flags) ((bits & flags) == flags)
+
+// Display buffer's is the same as the display memory layout
+// this is so we don't end up with rounding errors with
+// parts of the display unusable or don't get cleared correctly
+// and also allows for drawing & inverting
+uint8_t            st7565_buffer[ST7565_MATRIX_SIZE];
+uint8_t *          st7565_cursor;
+ST7565_BLOCK_TYPE  st7565_dirty       = 0;
+bool               st7565_initialized = false;
+bool               st7565_active      = false;
+bool               st7565_inverted    = false;
+display_rotation_t st7565_rotation    = DISPLAY_ROTATION_0;
+#if ST7565_TIMEOUT > 0
+uint32_t st7565_timeout;
+#endif
+#if ST7565_UPDATE_INTERVAL > 0
+uint16_t st7565_update_timeout;
+#endif
+
+// Flips the rendering bits for a character at the current cursor position
+static void InvertCharacter(uint8_t *cursor) {
+    const uint8_t *end = cursor + ST7565_FONT_WIDTH;
+    while (cursor < end) {
+        *cursor = ~(*cursor);
+        cursor++;
+    }
+}
+
+bool st7565_init(display_rotation_t rotation) {
+    setPinOutput(ST7565_A0_PIN);
+    writePinHigh(ST7565_A0_PIN);
+    setPinOutput(ST7565_RST_PIN);
+    writePinHigh(ST7565_RST_PIN);
+
+    st7565_rotation = st7565_init_user(rotation);
+
+    spi_init();
+    spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
+
+    st7565_reset();
+
+    st7565_send_cmd(LCD_BIAS_7);
+    if (!HAS_FLAGS(st7565_rotation, DISPLAY_ROTATION_180)) {
+        st7565_send_cmd(SEGMENT_REMAP);
+        st7565_send_cmd(COM_SCAN_DEC);
+    } else {
+        st7565_send_cmd(SEGMENT_REMAP_INV);
+        st7565_send_cmd(COM_SCAN_INC);
+    }
+    st7565_send_cmd(DISPLAY_START_LINE | 0x00);
+    st7565_send_cmd(CONTRAST);
+    st7565_send_cmd(ST7565_CONTRAST);
+    st7565_send_cmd(RESISTOR_RATIO | 0x01);
+    st7565_send_cmd(POWER_CONTROL | 0x04);
+    wait_ms(50);
+    st7565_send_cmd(POWER_CONTROL | 0x06);
+    wait_ms(50);
+    st7565_send_cmd(POWER_CONTROL | 0x07);
+    wait_ms(10);
+    st7565_send_cmd(DISPLAY_ON);
+    st7565_send_cmd(DISPLAY_ALL_ON_RESUME);
+    st7565_send_cmd(NORMAL_DISPLAY);
+
+    spi_stop();
+
+#if ST7565_TIMEOUT > 0
+    st7565_timeout = timer_read32() + ST7565_TIMEOUT;
+#endif
+
+    st7565_clear();
+    st7565_initialized = true;
+    st7565_active      = true;
+    return true;
+}
+
+__attribute__((weak)) display_rotation_t st7565_init_user(display_rotation_t rotation) { return rotation; }
+
+void st7565_clear(void) {
+    memset(st7565_buffer, 0, sizeof(st7565_buffer));
+    st7565_cursor = &st7565_buffer[0];
+    st7565_dirty  = ST7565_ALL_BLOCKS_MASK;
+}
+
+uint8_t crot(uint8_t a, int8_t n) {
+    const uint8_t mask = 0x7;
+    n &= mask;
+    return a << n | a >> (-n & mask);
+}
+
+void st7565_render(void) {
+    if (!st7565_initialized) {
+        return;
+    }
+
+    // Do we have work to do?
+    st7565_dirty &= ST7565_ALL_BLOCKS_MASK;
+    if (!st7565_dirty) {
+        return;
+    }
+
+    // Find first dirty block
+    uint8_t update_start = 0;
+    while (!(st7565_dirty & ((ST7565_BLOCK_TYPE)1 << update_start))) {
+        ++update_start;
+    }
+
+    // Calculate commands to set memory addressing bounds.
+    uint8_t start_page   = ST7565_BLOCK_SIZE * update_start / ST7565_DISPLAY_WIDTH;
+    uint8_t start_column = ST7565_BLOCK_SIZE * update_start % ST7565_DISPLAY_WIDTH;
+    // IC has 132 segment drivers, for panels with less width we need to offset the starting column
+    if (HAS_FLAGS(st7565_rotation, DISPLAY_ROTATION_180)) {
+        start_column += (132 - ST7565_DISPLAY_WIDTH);
+    }
+
+    spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
+
+    st7565_send_cmd(PAM_PAGE_ADDR | start_page);
+    st7565_send_cmd(PAM_SETCOLUMN_LSB | ((ST7565_COLUMN_OFFSET + start_column) & 0x0f));
+    st7565_send_cmd(PAM_SETCOLUMN_MSB | ((ST7565_COLUMN_OFFSET + start_column) >> 4 & 0x0f));
+
+    st7565_send_data(&st7565_buffer[ST7565_BLOCK_SIZE * update_start], ST7565_BLOCK_SIZE);
+
+    // Turn on display if it is off
+    st7565_on();
+
+    // Clear dirty flag
+    st7565_dirty &= ~((ST7565_BLOCK_TYPE)1 << update_start);
+}
+
+void st7565_set_cursor(uint8_t col, uint8_t line) {
+    uint16_t index = line * ST7565_DISPLAY_WIDTH + col * ST7565_FONT_WIDTH;
+
+    // Out of bounds?
+    if (index >= ST7565_MATRIX_SIZE) {
+        index = 0;
+    }
+
+    st7565_cursor = &st7565_buffer[index];
+}
+
+void st7565_advance_page(bool clearPageRemainder) {
+    uint16_t index     = st7565_cursor - &st7565_buffer[0];
+    uint8_t  remaining = ST7565_DISPLAY_WIDTH - (index % ST7565_DISPLAY_WIDTH);
+
+    if (clearPageRemainder) {
+        // Remaining Char count
+        remaining = remaining / ST7565_FONT_WIDTH;
+
+        // Write empty character until next line
+        while (remaining--) st7565_write_char(' ', false);
+    } else {
+        // Next page index out of bounds?
+        if (index + remaining >= ST7565_MATRIX_SIZE) {
+            index     = 0;
+            remaining = 0;
+        }
+
+        st7565_cursor = &st7565_buffer[index + remaining];
+    }
+}
+
+void st7565_advance_char(void) {
+    uint16_t nextIndex      = st7565_cursor - &st7565_buffer[0] + ST7565_FONT_WIDTH;
+    uint8_t  remainingSpace = ST7565_DISPLAY_WIDTH - (nextIndex % ST7565_DISPLAY_WIDTH);
+
+    // Do we have enough space on the current line for the next character
+    if (remainingSpace < ST7565_FONT_WIDTH) {
+        nextIndex += remainingSpace;
+    }
+
+    // Did we go out of bounds
+    if (nextIndex >= ST7565_MATRIX_SIZE) {
+        nextIndex = 0;
+    }
+
+    // Update cursor position
+    st7565_cursor = &st7565_buffer[nextIndex];
+}
+
+// Main handler that writes character data to the display buffer
+void st7565_write_char(const char data, bool invert) {
+    // Advance to the next line if newline
+    if (data == '\n') {
+        // Old source wrote ' ' until end of line...
+        st7565_advance_page(true);
+        return;
+    }
+
+    if (data == '\r') {
+        st7565_advance_page(false);
+        return;
+    }
+
+    // copy the current render buffer to check for dirty after
+    static uint8_t st7565_temp_buffer[ST7565_FONT_WIDTH];
+    memcpy(&st7565_temp_buffer, st7565_cursor, ST7565_FONT_WIDTH);
+
+    _Static_assert(sizeof(font) >= ((ST7565_FONT_END + 1 - ST7565_FONT_START) * ST7565_FONT_WIDTH), "ST7565_FONT_END references outside array");
+
+    // set the reder buffer data
+    uint8_t cast_data = (uint8_t)data;  // font based on unsigned type for index
+    if (cast_data < ST7565_FONT_START || cast_data > ST7565_FONT_END) {
+        memset(st7565_cursor, 0x00, ST7565_FONT_WIDTH);
+    } else {
+        const uint8_t *glyph = &font[(cast_data - ST7565_FONT_START) * ST7565_FONT_WIDTH];
+        memcpy_P(st7565_cursor, glyph, ST7565_FONT_WIDTH);
+    }
+
+    // Invert if needed
+    if (invert) {
+        InvertCharacter(st7565_cursor);
+    }
+
+    // Dirty check
+    if (memcmp(&st7565_temp_buffer, st7565_cursor, ST7565_FONT_WIDTH)) {
+        uint16_t index = st7565_cursor - &st7565_buffer[0];
+        st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (index / ST7565_BLOCK_SIZE));
+        // Edgecase check if the written data spans the 2 chunks
+        st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << ((index + ST7565_FONT_WIDTH - 1) / ST7565_BLOCK_SIZE));
+    }
+
+    // Finally move to the next char
+    st7565_advance_char();
+}
+
+void st7565_write(const char *data, bool invert) {
+    const char *end = data + strlen(data);
+    while (data < end) {
+        st7565_write_char(*data, invert);
+        data++;
+    }
+}
+
+void st7565_write_ln(const char *data, bool invert) {
+    st7565_write(data, invert);
+    st7565_advance_page(true);
+}
+
+void st7565_pan(bool left) {
+    uint16_t i = 0;
+    for (uint16_t y = 0; y < ST7565_DISPLAY_HEIGHT / 8; y++) {
+        if (left) {
+            for (uint16_t x = 0; x < ST7565_DISPLAY_WIDTH - 1; x++) {
+                i                = y * ST7565_DISPLAY_WIDTH + x;
+                st7565_buffer[i] = st7565_buffer[i + 1];
+            }
+        } else {
+            for (uint16_t x = ST7565_DISPLAY_WIDTH - 1; x > 0; x--) {
+                i                = y * ST7565_DISPLAY_WIDTH + x;
+                st7565_buffer[i] = st7565_buffer[i - 1];
+            }
+        }
+    }
+    st7565_dirty = ST7565_ALL_BLOCKS_MASK;
+}
+
+display_buffer_reader_t st7565_read_raw(uint16_t start_index) {
+    if (start_index > ST7565_MATRIX_SIZE) start_index = ST7565_MATRIX_SIZE;
+    display_buffer_reader_t ret_reader;
+    ret_reader.current_element         = &st7565_buffer[start_index];
+    ret_reader.remaining_element_count = ST7565_MATRIX_SIZE - start_index;
+    return ret_reader;
+}
+
+void st7565_write_raw_byte(const char data, uint16_t index) {
+    if (index > ST7565_MATRIX_SIZE) index = ST7565_MATRIX_SIZE;
+    if (st7565_buffer[index] == data) return;
+    st7565_buffer[index] = data;
+    st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (index / ST7565_BLOCK_SIZE));
+}
+
+void st7565_write_raw(const char *data, uint16_t size) {
+    uint16_t cursor_start_index = st7565_cursor - &st7565_buffer[0];
+    if ((size + cursor_start_index) > ST7565_MATRIX_SIZE) size = ST7565_MATRIX_SIZE - cursor_start_index;
+    for (uint16_t i = cursor_start_index; i < cursor_start_index + size; i++) {
+        uint8_t c = *data++;
+        if (st7565_buffer[i] == c) continue;
+        st7565_buffer[i] = c;
+        st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (i / ST7565_BLOCK_SIZE));
+    }
+}
+
+void st7565_write_pixel(uint8_t x, uint8_t y, bool on) {
+    if (x >= ST7565_DISPLAY_WIDTH) {
+        return;
+    }
+    uint16_t index = x + (y / 8) * ST7565_DISPLAY_WIDTH;
+    if (index >= ST7565_MATRIX_SIZE) {
+        return;
+    }
+    uint8_t data = st7565_buffer[index];
+    if (on) {
+        data |= (1 << (y % 8));
+    } else {
+        data &= ~(1 << (y % 8));
+    }
+    if (st7565_buffer[index] != data) {
+        st7565_buffer[index] = data;
+        st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (index / ST7565_BLOCK_SIZE));
+    }
+}
+
+#if defined(__AVR__)
+void st7565_write_P(const char *data, bool invert) {
+    uint8_t c = pgm_read_byte(data);
+    while (c != 0) {
+        st7565_write_char(c, invert);
+        c = pgm_read_byte(++data);
+    }
+}
+
+void st7565_write_ln_P(const char *data, bool invert) {
+    st7565_write_P(data, invert);
+    st7565_advance_page(true);
+}
+
+void st7565_write_raw_P(const char *data, uint16_t size) {
+    uint16_t cursor_start_index = st7565_cursor - &st7565_buffer[0];
+    if ((size + cursor_start_index) > ST7565_MATRIX_SIZE) size = ST7565_MATRIX_SIZE - cursor_start_index;
+    for (uint16_t i = cursor_start_index; i < cursor_start_index + size; i++) {
+        uint8_t c = pgm_read_byte(data++);
+        if (st7565_buffer[i] == c) continue;
+        st7565_buffer[i] = c;
+        st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (i / ST7565_BLOCK_SIZE));
+    }
+}
+#endif  // defined(__AVR__)
+
+bool st7565_on(void) {
+    if (!st7565_initialized) {
+        return st7565_active;
+    }
+
+#if ST7565_TIMEOUT > 0
+    st7565_timeout = timer_read32() + ST7565_TIMEOUT;
+#endif
+
+    if (!st7565_active) {
+        spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
+        st7565_send_cmd(DISPLAY_ON);
+        spi_stop();
+        st7565_active = true;
+        st7565_on_user();
+    }
+    return st7565_active;
+}
+
+__attribute__((weak)) void st7565_on_user(void) {}
+
+bool st7565_off(void) {
+    if (!st7565_initialized) {
+        return !st7565_active;
+    }
+
+    if (st7565_active) {
+        spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
+        st7565_send_cmd(DISPLAY_OFF);
+        spi_stop();
+        st7565_active = false;
+        st7565_off_user();
+    }
+    return !st7565_active;
+}
+
+__attribute__((weak)) void st7565_off_user(void) {}
+
+bool st7565_is_on(void) { return st7565_active; }
+
+bool st7565_invert(bool invert) {
+    if (!st7565_initialized) {
+        return st7565_inverted;
+    }
+
+    if (invert != st7565_inverted) {
+        spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
+        st7565_send_cmd(invert ? INVERT_DISPLAY : NORMAL_DISPLAY);
+        spi_stop();
+        st7565_inverted = invert;
+    }
+    return st7565_inverted;
+}
+
+uint8_t st7565_max_chars(void) { return ST7565_DISPLAY_WIDTH / ST7565_FONT_WIDTH; }
+
+uint8_t st7565_max_lines(void) { return ST7565_DISPLAY_HEIGHT / ST7565_FONT_HEIGHT; }
+
+void st7565_task(void) {
+    if (!st7565_initialized) {
+        return;
+    }
+
+#if ST7565_UPDATE_INTERVAL > 0
+    if (timer_elapsed(st7565_update_timeout) >= ST7565_UPDATE_INTERVAL) {
+        st7565_update_timeout = timer_read();
+        st7565_set_cursor(0, 0);
+        st7565_task_user();
+    }
+#else
+    st7565_set_cursor(0, 0);
+    st7565_task_user();
+#endif
+
+    // Smart render system, no need to check for dirty
+    st7565_render();
+
+    // Display timeout check
+#if ST7565_TIMEOUT > 0
+    if (st7565_active && timer_expired32(timer_read32(), st7565_timeout)) {
+        st7565_off();
+    }
+#endif
+}
+
+__attribute__((weak)) void st7565_task_user(void) {}
+
+void st7565_reset(void) {
+    writePinLow(ST7565_RST_PIN);
+    wait_ms(20);
+    writePinHigh(ST7565_RST_PIN);
+    wait_ms(20);
+}
+
+spi_status_t st7565_send_cmd(uint8_t cmd) {
+    writePinLow(ST7565_A0_PIN);
+    return spi_write(cmd);
+}
+
+spi_status_t st7565_send_data(uint8_t *data, uint16_t length) {
+    writePinHigh(ST7565_A0_PIN);
+    return spi_transmit(data, length);
+}
diff --git a/drivers/lcd/st7565.h b/drivers/lcd/st7565.h
new file mode 100644
index 000000000..d453dbe6d
--- /dev/null
+++ b/drivers/lcd/st7565.h
@@ -0,0 +1,219 @@
+/*
+Copyright 2021
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "spi_master.h"
+
+#ifndef ST7565_DISPLAY_WIDTH
+#    define ST7565_DISPLAY_WIDTH 128
+#endif
+#ifndef ST7565_DISPLAY_HEIGHT
+#    define ST7565_DISPLAY_HEIGHT 32
+#endif
+#ifndef ST7565_MATRIX_SIZE
+#    define ST7565_MATRIX_SIZE (ST7565_DISPLAY_HEIGHT / 8 * ST7565_DISPLAY_WIDTH)  // 1024 (compile time mathed)
+#endif
+#ifndef ST7565_BLOCK_TYPE
+#    define ST7565_BLOCK_TYPE uint16_t
+#endif
+#ifndef ST7565_BLOCK_COUNT
+#    define ST7565_BLOCK_COUNT (sizeof(ST7565_BLOCK_TYPE) * 8)  // 32 (compile time mathed)
+#endif
+#ifndef ST7565_BLOCK_SIZE
+#    define ST7565_BLOCK_SIZE (ST7565_MATRIX_SIZE / ST7565_BLOCK_COUNT)  // 32 (compile time mathed)
+#endif
+
+// the column address corresponding to the first column in the display hardware
+#if !defined(ST7565_COLUMN_OFFSET)
+#    define ST7565_COLUMN_OFFSET 0
+#endif
+
+// spi clock divisor
+#if !defined(ST7565_SPI_CLK_DIVISOR)
+#    define ST7565_SPI_CLK_DIVISOR 4
+#endif
+
+// Custom font file to use
+#if !defined(ST7565_FONT_H)
+#    define ST7565_FONT_H "glcdfont.c"
+#endif
+// unsigned char value of the first character in the font file
+#if !defined(ST7565_FONT_START)
+#    define ST7565_FONT_START 0
+#endif
+// unsigned char value of the last character in the font file
+#if !defined(ST7565_FONT_END)
+#    define ST7565_FONT_END 223
+#endif
+// Font render width
+#if !defined(ST7565_FONT_WIDTH)
+#    define ST7565_FONT_WIDTH 6
+#endif
+// Font render height
+#if !defined(ST7565_FONT_HEIGHT)
+#    define ST7565_FONT_HEIGHT 8
+#endif
+// Default contrast level
+#if !defined(ST7565_CONTRAST)
+#    define ST7565_CONTRAST 32
+#endif
+
+#if !defined(ST7565_TIMEOUT)
+#    if defined(ST7565_DISABLE_TIMEOUT)
+#        define ST7565_TIMEOUT 0
+#    else
+#        define ST7565_TIMEOUT 60000
+#    endif
+#endif
+
+#if !defined(ST7565_UPDATE_INTERVAL) && defined(SPLIT_KEYBOARD)
+#    define ST7565_UPDATE_INTERVAL 50
+#endif
+
+typedef struct __attribute__((__packed__)) {
+    uint8_t *current_element;
+    uint16_t remaining_element_count;
+} display_buffer_reader_t;
+
+// Rotation enum values are flags
+typedef enum { DISPLAY_ROTATION_0, DISPLAY_ROTATION_180 } display_rotation_t;
+
+// Initialize the display, rotating the rendered output based on the define passed in.
+// Returns true if the display was initialized successfully
+bool st7565_init(display_rotation_t rotation);
+
+// Called at the start of st7565_init, weak function overridable by the user
+// rotation - the value passed into st7565_init
+// Return new display_rotation_t if you want to override default rotation
+display_rotation_t st7565_init_user(display_rotation_t rotation);
+
+// Clears the display buffer, resets cursor position to 0, and sets the buffer to dirty for rendering
+void st7565_clear(void);
+
+// Renders the dirty chunks of the buffer to display
+void st7565_render(void);
+
+// Moves cursor to character position indicated by column and line, wraps if out of bounds
+// Max column denoted by 'st7565_max_chars()' and max lines by 'st7565_max_lines()' functions
+void st7565_set_cursor(uint8_t col, uint8_t line);
+
+// Advances the cursor to the next page, writing ' ' if true
+// Wraps to the begining when out of bounds
+void st7565_advance_page(bool clearPageRemainder);
+
+// Moves the cursor forward 1 character length
+// Advance page if there is not enough room for the next character
+// Wraps to the begining when out of bounds
+void st7565_advance_char(void);
+
+// Writes a single character to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+// Main handler that writes character data to the display buffer
+void st7565_write_char(const char data, bool invert);
+
+// Writes a string to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+void st7565_write(const char *data, bool invert);
+
+// Writes a string to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+// Advances the cursor to the next page, wiring ' ' to the remainder of the current page
+void st7565_write_ln(const char *data, bool invert);
+
+// Pans the buffer to the right (or left by passing true) by moving contents of the buffer
+// Useful for moving the screen in preparation for new drawing
+void st7565_pan(bool left);
+
+// Returns a pointer to the requested start index in the buffer plus remaining
+// buffer length as struct
+display_buffer_reader_t st7565_read_raw(uint16_t start_index);
+
+// Writes a string to the buffer at current cursor position
+void st7565_write_raw(const char *data, uint16_t size);
+
+// Writes a single byte into the buffer at the specified index
+void st7565_write_raw_byte(const char data, uint16_t index);
+
+// Sets a specific pixel on or off
+// Coordinates start at top-left and go right and down for positive x and y
+void st7565_write_pixel(uint8_t x, uint8_t y, bool on);
+
+#if defined(__AVR__)
+// Writes a PROGMEM string to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+// Remapped to call 'void st7565_write(const char *data, bool invert);' on ARM
+void st7565_write_P(const char *data, bool invert);
+
+// Writes a PROGMEM string to the buffer at current cursor position
+// Advances the cursor while writing, inverts the pixels if true
+// Advances the cursor to the next page, wiring ' ' to the remainder of the current page
+// Remapped to call 'void st7565_write_ln(const char *data, bool invert);' on ARM
+void st7565_write_ln_P(const char *data, bool invert);
+
+// Writes a PROGMEM string to the buffer at current cursor position
+void st7565_write_raw_P(const char *data, uint16_t size);
+#else
+#    define st7565_write_P(data, invert) st7565_write(data, invert)
+#    define st7565_write_ln_P(data, invert) st7565_write_ln(data, invert)
+#    define st7565_write_raw_P(data, size) st7565_write_raw(data, size)
+#endif  // defined(__AVR__)
+
+// Can be used to manually turn on the screen if it is off
+// Returns true if the screen was on or turns on
+bool st7565_on(void);
+
+// Called when st7565_on() turns on the screen, weak function overridable by the user
+// Not called if the screen is already on
+void st7565_on_user(void);
+
+// Can be used to manually turn off the screen if it is on
+// Returns true if the screen was off or turns off
+bool st7565_off(void);
+
+// Called when st7565_off() turns off the screen, weak function overridable by the user
+// Not called if the screen is already off
+void st7565_off_user(void);
+
+// Returns true if the screen is currently on, false if it is
+// not
+bool st7565_is_on(void);
+
+// Basically it's st7565_render, but with timeout management and st7565_task_user calling!
+void st7565_task(void);
+
+// Called at the start of st7565_task, weak function overridable by the user
+void st7565_task_user(void);
+
+// Inverts the display
+// Returns true if the screen was or is inverted
+bool st7565_invert(bool invert);
+
+// Returns the maximum number of characters that will fit on a line
+uint8_t st7565_max_chars(void);
+
+// Returns the maximum number of lines that will fit on the display
+uint8_t st7565_max_lines(void);
+
+void st7565_reset(void);
+
+spi_status_t st7565_send_cmd(uint8_t cmd);
+
+spi_status_t st7565_send_data(uint8_t *data, uint16_t length);
diff --git a/drivers/oled/oled_driver.c b/drivers/oled/oled_driver.c
index 8e5ed5f07..7d4197890 100644
--- a/drivers/oled/oled_driver.c
+++ b/drivers/oled/oled_driver.c
@@ -34,6 +34,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DISPLAY_ALL_ON 0xA5
 #define DISPLAY_ALL_ON_RESUME 0xA4
 #define NORMAL_DISPLAY 0xA6
+#define INVERT_DISPLAY 0xA7
 #define DISPLAY_ON 0xAF
 #define DISPLAY_OFF 0xAE
 #define NOP 0xE3
@@ -114,6 +115,7 @@ OLED_BLOCK_TYPE oled_dirty          = 0;
 bool            oled_initialized    = false;
 bool            oled_active         = false;
 bool            oled_scrolling      = false;
+bool            oled_inverted       = false;
 uint8_t         oled_brightness     = OLED_BRIGHTNESS;
 oled_rotation_t oled_rotation       = 0;
 uint8_t         oled_rotation_width = 0;
@@ -690,6 +692,30 @@ bool oled_scroll_off(void) {
     return !oled_scrolling;
 }
 
+bool oled_invert(bool invert) {
+    if (!oled_initialized) {
+        return oled_inverted;
+    }
+
+    if (invert && !oled_inverted) {
+        static const uint8_t PROGMEM display_inverted[] = {I2C_CMD, INVERT_DISPLAY};
+        if (I2C_TRANSMIT_P(display_inverted) != I2C_STATUS_SUCCESS) {
+            print("oled_invert cmd failed\n");
+            return oled_inverted;
+        }
+        oled_inverted = true;
+    } else if (!invert && oled_inverted) {
+        static const uint8_t PROGMEM display_normal[] = {I2C_CMD, NORMAL_DISPLAY};
+        if (I2C_TRANSMIT_P(display_normal) != I2C_STATUS_SUCCESS) {
+            print("oled_invert cmd failed\n");
+            return oled_inverted;
+        }
+        oled_inverted = false;
+    }
+
+    return oled_inverted;
+}
+
 uint8_t oled_max_chars(void) {
     if (!HAS_FLAGS(oled_rotation, OLED_ROTATION_90)) {
         return OLED_DISPLAY_WIDTH / OLED_FONT_WIDTH;
diff --git a/drivers/oled/oled_driver.h b/drivers/oled/oled_driver.h
index a6b85f37e..fc68f0ec9 100644
--- a/drivers/oled/oled_driver.h
+++ b/drivers/oled/oled_driver.h
@@ -313,6 +313,10 @@ bool oled_scroll_left(void);
 // Returns true if the screen was not scrolling or stops scrolling
 bool oled_scroll_off(void);
 
+// Inverts the display
+// Returns true if the screen was or is inverted
+bool oled_invert(bool invert);
+
 // Returns the maximum number of characters that will fit on a line
 uint8_t oled_max_chars(void);
 
diff --git a/keyboards/ploopyco/adns5050.c b/drivers/sensors/adns5050.c
index e12e56f20..e7273977d 100644
--- a/keyboards/ploopyco/adns5050.c
+++ b/drivers/sensors/adns5050.c
@@ -19,20 +19,16 @@
 
 
 #include "adns5050.h"
-#include "quantum.h"
 #include "wait.h"
-
-#ifdef CONSOLE_ENABLE
-#    include "print.h"
-#endif
+#include "debug.h"
+#include "print.h"
+#include "gpio.h"
 
 #ifndef OPTIC_ROTATED
 #    define OPTIC_ROTATED false
 #endif
 
 // Definitions for the ADNS serial line.
-// These really ought to be defined in your config.h, but defaults are
-// here if you're really lazy.
 #ifndef ADNS_SCLK_PIN
 #    define ADNS_SCLK_PIN B7
 #endif
diff --git a/keyboards/ploopyco/adns5050.h b/drivers/sensors/adns5050.h
index ff8e8f78e..ff8e8f78e 100644
--- a/keyboards/ploopyco/adns5050.h
+++ b/drivers/sensors/adns5050.h
diff --git a/keyboards/oddball/adns/adns.c b/drivers/sensors/adns9800.c
index 9338808ff..36213179f 100644
--- a/keyboards/oddball/adns/adns.c
+++ b/drivers/sensors/adns9800.c
@@ -17,7 +17,7 @@
 #include "spi_master.h"
 #include "quantum.h"
 #include "adns9800_srom_A6.h"
-#include "adns.h"
+#include "adns9800.h"
 
 // registers
 #define REG_Product_ID                           0x00
diff --git a/keyboards/oddball/adns/adns.h b/drivers/sensors/adns9800.h
index 2f50b8f1b..2f50b8f1b 100644
--- a/keyboards/oddball/adns/adns.h
+++ b/drivers/sensors/adns9800.h
diff --git a/keyboards/oddball/adns/adns9800_srom_A6.h b/drivers/sensors/adns9800_srom_A6.h
index f5b3abeb6..f5b3abeb6 100644
--- a/keyboards/oddball/adns/adns9800_srom_A6.h
+++ b/drivers/sensors/adns9800_srom_A6.h
diff --git a/keyboards/draculad/keymaps/pimoroni/pimoroni_trackball.c b/drivers/sensors/pimoroni_trackball.c
index c4f4a0441..c0ac644f7 100644
--- a/keyboards/draculad/keymaps/pimoroni/pimoroni_trackball.c
+++ b/drivers/sensors/pimoroni_trackball.c
@@ -26,8 +26,8 @@ static float   precisionSpeed = 1;
 
 static uint16_t i2c_timeout_timer;
 
-#ifndef I2C_TIMEOUT
-#    define I2C_TIMEOUT 100
+#ifndef PIMORONI_I2C_TIMEOUT
+#    define PIMORONI_I2C_TIMEOUT 100
 #endif
 #ifndef I2C_WAITCHECK
 #    define I2C_WAITCHECK 1000
@@ -38,7 +38,7 @@ static uint16_t i2c_timeout_timer;
 
 void trackball_set_rgbw(uint8_t red, uint8_t green, uint8_t blue, uint8_t white) {
     uint8_t data[] = {0x00, red, green, blue, white};
-    i2c_transmit(TRACKBALL_WRITE, data, sizeof(data), I2C_TIMEOUT);
+    i2c_transmit(TRACKBALL_WRITE, data, sizeof(data), PIMORONI_I2C_TIMEOUT);
 }
 
 int16_t mouse_offset(uint8_t positive, uint8_t negative, int16_t scale) {
@@ -68,59 +68,19 @@ __attribute__((weak)) void trackball_check_click(bool pressed, report_mouse_t* m
     }
 }
 
-bool process_record_kb(uint16_t keycode, keyrecord_t* record) {
-    if (true) {
-        xprintf("KL: kc: %u, col: %u, row: %u, pressed: %u\n", keycode, record->event.key.col, record->event.key.row, record->event.pressed);
-    }
-
-
-    if (!process_record_user(keycode, record)) { return false; }
-
-/* If Mousekeys is disabled, then use handle the mouse button
- * keycodes.  This makes things simpler, and allows usage of
- * the keycodes in a consistent manner.  But only do this if
- * Mousekeys is not enable, so it's not handled twice.
- */
-#ifndef MOUSEKEY_ENABLE
-    if (IS_MOUSEKEY_BUTTON(keycode)) {
-        report_mouse_t currentReport = pointing_device_get_report();
-        if (record->event.pressed) {
-            currentReport.buttons |= 1 << (keycode - KC_MS_BTN1);
-        } else {
-            currentReport.buttons &= ~(1 << (keycode - KC_MS_BTN1));
-        }
-        pointing_device_set_report(currentReport);
-        pointing_device_send();
-    }
-#endif
-
-    return true;
-}
-
-void trackball_register_button(bool pressed, enum mouse_buttons button) {
-    report_mouse_t currentReport = pointing_device_get_report();
-    if (pressed) {
-        currentReport.buttons |= button;
-    } else {
-        currentReport.buttons &= ~button;
-    }
-    pointing_device_set_report(currentReport);
-}
-
 float trackball_get_precision(void) { return precisionSpeed; }
 void  trackball_set_precision(float precision) { precisionSpeed = precision; }
 bool  trackball_is_scrolling(void) { return scrolling; }
 void  trackball_set_scrolling(bool scroll) { scrolling = scroll; }
 
-
-__attribute__((weak)) void pointing_device_init(void) { trackball_set_rgbw(0x80, 0x00, 0x00, 0x00); }
+__attribute__((weak)) void pointing_device_init(void) { i2c_init(); trackball_set_rgbw(0x00, 0x00, 0x00, 0x00); }
 
 void pointing_device_task(void) {
     static bool     debounce;
     static uint16_t debounce_timer;
     uint8_t         state[5] = {};
     if (timer_elapsed(i2c_timeout_timer) > I2C_WAITCHECK) {
-        if (i2c_readReg(TRACKBALL_WRITE, 0x04, state, 5, I2C_TIMEOUT) == I2C_STATUS_SUCCESS) {
+        if (i2c_readReg(TRACKBALL_READ, 0x04, state, 5, PIMORONI_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) {
             if (!state[4] && !debounce) {
                 if (scrolling) {
 #ifdef PIMORONI_TRACKBALL_INVERT_X
@@ -159,7 +119,10 @@ void pointing_device_task(void) {
     if (timer_elapsed(debounce_timer) > MOUSE_DEBOUNCE) debounce = false;
 
     report_mouse_t mouse = pointing_device_get_report();
-    // trackball_check_click(state[4] & (1 << 7), &mouse);
+
+#ifdef PIMORONI_TRACKBALL_CLICK
+    trackball_check_click(state[4] & (1 << 7), &mouse);
+#endif
 
 #ifndef PIMORONI_TRACKBALL_ROTATE
     update_member(&mouse.x, &x_offset);
diff --git a/users/drashna/pimoroni_trackball.h b/drivers/sensors/pimoroni_trackball.h
index a30fb0bb8..a30fb0bb8 100644
--- a/users/drashna/pimoroni_trackball.h
+++ b/drivers/sensors/pimoroni_trackball.h
diff --git a/keyboards/handwired/dactyl_manuform/5x6_right_trackball/pmw3360.c b/drivers/sensors/pmw3360.c
index 59e349512..91ee87b95 100644
--- a/keyboards/handwired/dactyl_manuform/5x6_right_trackball/pmw3360.c
+++ b/drivers/sensors/pmw3360.c
@@ -16,8 +16,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifdef POINTING_DEVICE_ENABLE
-
 #include "wait.h"
 #include "debug.h"
 #include "print.h"
@@ -29,17 +27,26 @@ bool _inBurst = false;
 #ifndef PMW_CPI
 #    define PMW_CPI 1600
 #endif
+#ifndef PMW_CLOCK_SPEED
+#    define PMW_CLOCK_SPEED 70000000
+#endif
+#ifndef SPI_MODE
+#    define SPI_MODE 3
+#endif
 #ifndef SPI_DIVISOR
-#    define SPI_DIVISOR 2
+#    define SPI_DIVISOR (F_CPU / PMW_CLOCK_SPEED)
 #endif
 #ifndef ROTATIONAL_TRANSFORM_ANGLE
 #    define ROTATIONAL_TRANSFORM_ANGLE 0x00
 #endif
+#ifndef PMW_CS_PIN
+#    define PMW_CS_PIN SPI_SS_PIN
+#endif
 
 void print_byte(uint8_t byte) { dprintf("%c%c%c%c%c%c%c%c|", (byte & 0x80 ? '1' : '0'), (byte & 0x40 ? '1' : '0'), (byte & 0x20 ? '1' : '0'), (byte & 0x10 ? '1' : '0'), (byte & 0x08 ? '1' : '0'), (byte & 0x04 ? '1' : '0'), (byte & 0x02 ? '1' : '0'), (byte & 0x01 ? '1' : '0')); }
 
 bool spi_start_adv(void) {
-    bool status = spi_start(SPI_SS_PIN, false, 3, SPI_DIVISOR);
+    bool status = spi_start(PMW_CS_PIN, false, SPI_MODE, SPI_DIVISOR);
     wait_us(1);
     return status;
 }
@@ -57,7 +64,7 @@ spi_status_t spi_write_adv(uint8_t reg_addr, uint8_t data) {
     spi_start_adv();
     // send address of the register, with MSBit = 1 to indicate it's a write
     spi_status_t status = spi_write(reg_addr | 0x80);
-    status = spi_write(data);
+    status              = spi_write(data);
 
     // tSCLK-NCS for write operation
     wait_us(20);
@@ -86,14 +93,21 @@ uint8_t spi_read_adv(uint8_t reg_addr) {
 }
 
 void pmw_set_cpi(uint16_t cpi) {
-    int cpival = constrain((cpi / 100) - 1, 0, 0x77);  // limits to 0--119
+    uint8_t cpival = constrain((cpi / 100) - 1, 0, 0x77);  // limits to 0--119
 
     spi_start_adv();
     spi_write_adv(REG_Config1, cpival);
     spi_stop();
 }
 
+uint16_t pmw_get_cpi(void) {
+    uint8_t cpival = spi_read_adv(REG_Config1);
+    return (uint16_t)(cpival & 0xFF) * 100;
+}
+
 bool pmw_spi_init(void) {
+    setPinOutput(PMW_CS_PIN);
+
     spi_init();
     _inBurst = false;
 
@@ -101,7 +115,7 @@ bool pmw_spi_init(void) {
     spi_start_adv();
     spi_stop();
 
-    spi_write_adv(REG_Shutdown, 0xb6); // Shutdown first
+    spi_write_adv(REG_Shutdown, 0xb6);  // Shutdown first
     wait_ms(300);
 
     spi_start_adv();
@@ -127,14 +141,18 @@ bool pmw_spi_init(void) {
 
     wait_ms(1);
 
-    return pmw_check_signature();
-}
-
-void pmw_upload_firmware(void) {
     spi_write_adv(REG_Config2, 0x00);
 
     spi_write_adv(REG_Angle_Tune, constrain(ROTATIONAL_TRANSFORM_ANGLE, -30, 30));
 
+    bool init_success = pmw_check_signature();
+
+    writePinLow(PMW_CS_PIN);
+
+    return init_success;
+}
+
+void pmw_upload_firmware(void) {
     spi_write_adv(REG_SROM_Enable, 0x1d);
 
     wait_ms(10);
@@ -217,5 +235,3 @@ report_pmw_t pmw_read_burst(void) {
 
     return data;
 }
-
-#endif
diff --git a/keyboards/handwired/dactyl_manuform/5x6_right_trackball/pmw3360.h b/drivers/sensors/pmw3360.h
index c1d5e3bad..d5b174179 100644
--- a/keyboards/handwired/dactyl_manuform/5x6_right_trackball/pmw3360.h
+++ b/drivers/sensors/pmw3360.h
@@ -93,6 +93,7 @@ spi_status_t spi_write_adv(uint8_t reg_addr, uint8_t data);
 uint8_t spi_read_adv(uint8_t reg_addr);
 bool pmw_spi_init(void);
 void pmw_set_cpi(uint16_t cpi);
+uint16_t pmw_get_cpi(void);
 void pmw_upload_firmware(void);
 bool pmw_check_signature(void);
 report_pmw_t pmw_read_burst(void);
diff --git a/keyboards/handwired/dactyl_manuform/5x6_right_trackball/pmw3360_firmware.h b/drivers/sensors/pmw3360_firmware.h
index cca5a6a4d..cca5a6a4d 100644
--- a/keyboards/handwired/dactyl_manuform/5x6_right_trackball/pmw3360_firmware.h
+++ b/drivers/sensors/pmw3360_firmware.h
diff --git a/drivers/serial.h b/drivers/serial.h
new file mode 100644
index 000000000..d9c2a69e9
--- /dev/null
+++ b/drivers/serial.h
@@ -0,0 +1,46 @@
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <transactions.h>
+
+// initiator is transaction start side
+void soft_serial_initiator_init(void);
+// target is interrupt accept side
+void soft_serial_target_init(void);
+
+// initiator result
+#define TRANSACTION_END 0
+#define TRANSACTION_NO_RESPONSE 0x1
+#define TRANSACTION_DATA_ERROR 0x2
+#define TRANSACTION_TYPE_ERROR 0x4
+int soft_serial_transaction(int sstd_index);
+
+// target status
+// *SSTD_t.status has
+//   initiator:
+//       TRANSACTION_END
+//    or TRANSACTION_NO_RESPONSE
+//    or TRANSACTION_DATA_ERROR
+//   target:
+//       TRANSACTION_DATA_ERROR
+//    or TRANSACTION_ACCEPTED
+#define TRANSACTION_ACCEPTED 0x8
+int soft_serial_get_and_clean_status(int sstd_index);
diff --git a/keyboards/anavi/macropad8/keymaps/default/config.h b/keyboards/anavi/macropad8/keymaps/default/config.h
new file mode 100644
index 000000000..dd687cad5
--- /dev/null
+++ b/keyboards/anavi/macropad8/keymaps/default/config.h
@@ -0,0 +1,19 @@
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#define LAYER_STATE_8BIT
diff --git a/keyboards/basekeys/trifecta/config.h b/keyboards/basekeys/trifecta/config.h
index 8a9529126..28c9c18fb 100644
--- a/keyboards/basekeys/trifecta/config.h
+++ b/keyboards/basekeys/trifecta/config.h
@@ -80,11 +80,11 @@
 #   define RGB_MATRIX_KEYPRESSES // reacts to keypresses
 // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-//#   define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+//#   define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #   define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #   define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 #   define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
-#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150 // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash. 
+#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150 // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash.
 #    define RGB_MATRIX_HUE_STEP 8
 #    define RGB_MATRIX_SAT_STEP 8
 #    define RGB_MATRIX_VAL_STEP 8
diff --git a/keyboards/bm40hsrgb/config.h b/keyboards/bm40hsrgb/config.h
index 167a5667a..8ef9a78c7 100755
--- a/keyboards/bm40hsrgb/config.h
+++ b/keyboards/bm40hsrgb/config.h
@@ -50,6 +50,6 @@
 #ifdef RGB_DI_PIN
     #define RGB_MATRIX_KEYPRESSES // reacts to keypresses
 #endif
-#ifndef RGB_DISABLE_WHEN_USB_SUSPENDED
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#ifdef RGB_MATRIX_ENABLE
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #endif
diff --git a/keyboards/bm68rgb/keymaps/peepeetee/config.h b/keyboards/bm68rgb/keymaps/peepeetee/config.h
index 53eebce7f..aada255cd 100644
--- a/keyboards/bm68rgb/keymaps/peepeetee/config.h
+++ b/keyboards/bm68rgb/keymaps/peepeetee/config.h
@@ -64,7 +64,7 @@
 // #define RGBLIGHT_SAT_STEP 25        // Units to step when in/decreasing saturation
 // #define RGBLIGHT_VAL_STEP 12        // Units to step when in/decreasing value (brightness)
 // #define RGB_DISABLE_AFTER_TIMEOUT 0   // number of ticks to wait until disabling effects
-// #define RGB_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
+// #define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 // #define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 // #define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 // #define RGBLIGHT_ANIMATIONS             // Run RGB animations
diff --git a/keyboards/boardsource/the_mark/config.h b/keyboards/boardsource/the_mark/config.h
index 5888452ce..9ca598b40 100644
--- a/keyboards/boardsource/the_mark/config.h
+++ b/keyboards/boardsource/the_mark/config.h
@@ -59,7 +59,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DRIVER_LED_TOTAL 24 // Number of LEDs
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 200
 #    ifndef RGB_DISABLE_WHEN_USB_SUSPENDED
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    endif
 #endif
 
diff --git a/keyboards/checkerboards/nop60/info.json b/keyboards/checkerboards/nop60/info.json
index 82ff7229f..66e770634 100644
--- a/keyboards/checkerboards/nop60/info.json
+++ b/keyboards/checkerboards/nop60/info.json
@@ -1,15 +1,143 @@
 {
     "keyboard_name": "nop60",
-    "url": "",
     "maintainer": "nasp",
-    "width": 15,
     "height": 5,
+    "width": 15,
+    "url": "",
     "layouts": {
         "LAYOUT": {
-            "2x3u": [{"label":"Esc", "x":0, "y":0}, {"label":"!", "x":1, "y":0}, {"label":"@", "x":2, "y":0}, {"label":"#", "x":3, "y":0}, {"label":"$", "x":4, "y":0}, {"label":"%", "x":5, "y":0}, {"label":"^", "x":6, "y":0}, {"label":"&", "x":7, "y":0}, {"label":"*", "x":8, "y":0}, {"label":"(", "x":9, "y":0}, {"label":")", "x":10, "y":0}, {"label":"_", "x":11, "y":0}, {"label":"+", "x":12, "y":0}, {"label":"~", "x":13, "y":0}, {"label":"Bksp", "x":14, "y":0}, {"label":"Tab", "x":0, "y":1, "w":1.5}, {"label":"Q", "x":1.5, "y":1}, {"label":"W", "x":2.5, "y":1}, {"label":"E", "x":3.5, "y":1}, {"label":"R", "x":4.5, "y":1}, {"label":"T", "x":5.5, "y":1}, {"label":"Y", "x":6.5, "y":1}, {"label":"U", "x":7.5, "y":1}, {"label":"I", "x":8.5, "y":1}, {"label":"O", "x":9.5, "y":1}, {"label":"P", "x":10.5, "y":1}, {"label":"{", "x":11.5, "y":1}, {"label":"}", "x":12.5, "y":1}, {"label":"|", "x":13.5, "y":1, "w":1.5}, {"label":"Caps Lock", "x":0, "y":2, "w":1.75}, {"label":"A", "x":1.75, "y":2}, {"label":"S", "x":2.75, "y":2}, {"label":"D", "x":3.75, "y":2}, {"label":"F", "x":4.75, "y":2}, {"label":"G", "x":5.75, "y":2}, {"label":"H", "x":6.75, "y":2}, {"label":"J", "x":7.75, "y":2}, {"label":"K", "x":8.75, "y":2}, {"label":"L", "x":9.75, "y":2}, {"label":":", "x":10.75, "y":2}, {"label":"\"", "x":11.75, "y":2}, {"label":"Enter", "x":12.75, "y":2, "w":2.25}, {"label":"Shift", "x":0, "y":3, "w":2.25}, {"label":"Z", "x":2.25, "y":3}, {"label":"X", "x":3.25, "y":3}, {"label":"C", "x":4.25, "y":3}, {"label":"V", "x":5.25, "y":3}, {"label":"B", "x":6.25, "y":3}, {"label":"N", "x":7.25, "y":3}, {"label":"M", "x":8.25, "y":3}, {"label":"<", "x":9.25, "y":3}, {"label":">", "x":10.25, "y":3}, {"label":"?", "x":11.25, "y":3}, {"label":"Shift", "x":12.25, "y":3, "w":1.75}, {"label":"Fn", "x":14, "y":3}, {"label":"Ctrl", "x":0, "y":4, "w":1.5}, {"label":"Win", "x":1.5, "y":4}, {"label":"Alt", "x":2.5, "y":4, "w":1.5}, {"x":4, "y":4, "w":3}, {"x":7, "y":4}, {"x":8, "y":4, "w":3}, {"label":"Alt", "x":11, "y":4, "w":1.5}, {"label":"Win", "x":12.5, "y":4}, {"label":"Ctrl", "x":13.5, "y":4, "w":1.5}]
+            "layout": [
+                { "label": "Esc", "x": 0, "y": 0 },
+                { "label": "!", "x": 1, "y": 0 },
+                { "label": "@", "x": 2, "y": 0 },
+                { "label": "#", "x": 3, "y": 0 },
+                { "label": "$", "x": 4, "y": 0 },
+                { "label": "%", "x": 5, "y": 0 },
+                { "label": "^", "x": 6, "y": 0 },
+                { "label": "&", "x": 7, "y": 0 },
+                { "label": "*", "x": 8, "y": 0 },
+                { "label": "(", "x": 9, "y": 0 },
+                { "label": ")", "x": 10, "y": 0 },
+                { "label": "_", "x": 11, "y": 0 },
+                { "label": "+", "x": 12, "y": 0 },
+                { "label": "~", "x": 13, "y": 0 },
+                { "label": "Bksp", "x": 14, "y": 0 },
+                { "label": "Tab", "w": 1.5, "x": 0, "y": 1 },
+                { "label": "Q", "x": 1.5, "y": 1 },
+                { "label": "W", "x": 2.5, "y": 1 },
+                { "label": "E", "x": 3.5, "y": 1 },
+                { "label": "R", "x": 4.5, "y": 1 },
+                { "label": "T", "x": 5.5, "y": 1 },
+                { "label": "Y", "x": 6.5, "y": 1 },
+                { "label": "U", "x": 7.5, "y": 1 },
+                { "label": "I", "x": 8.5, "y": 1 },
+                { "label": "O", "x": 9.5, "y": 1 },
+                { "label": "P", "x": 10.5, "y": 1 },
+                { "label": "{", "x": 11.5, "y": 1 },
+                { "label": "}", "x": 12.5, "y": 1 },
+                { "label": "|", "w": 1.5, "x": 13.5, "y": 1 },
+                { "label": "Caps Lock", "w": 1.75, "x": 0, "y": 2 },
+                { "label": "A", "x": 1.75, "y": 2 },
+                { "label": "S", "x": 2.75, "y": 2 },
+                { "label": "D", "x": 3.75, "y": 2 },
+                { "label": "F", "x": 4.75, "y": 2 },
+                { "label": "G", "x": 5.75, "y": 2 },
+                { "label": "H", "x": 6.75, "y": 2 },
+                { "label": "J", "x": 7.75, "y": 2 },
+                { "label": "K", "x": 8.75, "y": 2 },
+                { "label": "L", "x": 9.75, "y": 2 },
+                { "label": ":", "x": 10.75, "y": 2 },
+                { "label": "\"", "x": 11.75, "y": 2 },
+                { "label": "Enter", "w": 2.25, "x": 12.75, "y": 2 },
+                { "label": "Shift", "w": 2.25, "x": 0, "y": 3 },
+                { "label": "Z", "x": 2.25, "y": 3 },
+                { "label": "X", "x": 3.25, "y": 3 },
+                { "label": "C", "x": 4.25, "y": 3 },
+                { "label": "V", "x": 5.25, "y": 3 },
+                { "label": "B", "x": 6.25, "y": 3 },
+                { "label": "N", "x": 7.25, "y": 3 },
+                { "label": "M", "x": 8.25, "y": 3 },
+                { "label": "<", "x": 9.25, "y": 3 },
+                { "label": ">", "x": 10.25, "y": 3 },
+                { "label": "?", "x": 11.25, "y": 3 },
+                { "label": "Shift", "w": 1.75, "x": 12.25, "y": 3 },
+                { "label": "Fn", "x": 14, "y": 3 },
+                { "label": "Ctrl", "w": 1.5, "x": 0, "y": 4 },
+                { "label": "Win", "x": 1.5, "y": 4 },
+                { "label": "Alt", "w": 1.5, "x": 2.5, "y": 4 },
+                { "w": 7, "x": 4, "y": 4 },
+                { "label": "Alt", "w": 1.5, "x": 11, "y": 4 },
+                { "label": "Win", "x": 12.5, "y": 4 },
+                { "label": "Ctrl", "w": 1.5, "x": 13.5, "y": 4 }
+            ]
         },
-            "LAYOUT": {
-            "7u": [{"label":"Esc", "x":0, "y":0}, {"label":"!", "x":1, "y":0}, {"label":"@", "x":2, "y":0}, {"label":"#", "x":3, "y":0}, {"label":"$", "x":4, "y":0}, {"label":"%", "x":5, "y":0}, {"label":"^", "x":6, "y":0}, {"label":"&", "x":7, "y":0}, {"label":"*", "x":8, "y":0}, {"label":"(", "x":9, "y":0}, {"label":")", "x":10, "y":0}, {"label":"_", "x":11, "y":0}, {"label":"+", "x":12, "y":0}, {"label":"~", "x":13, "y":0}, {"label":"Bksp", "x":14, "y":0}, {"label":"Tab", "x":0, "y":1, "w":1.5}, {"label":"Q", "x":1.5, "y":1}, {"label":"W", "x":2.5, "y":1}, {"label":"E", "x":3.5, "y":1}, {"label":"R", "x":4.5, "y":1}, {"label":"T", "x":5.5, "y":1}, {"label":"Y", "x":6.5, "y":1}, {"label":"U", "x":7.5, "y":1}, {"label":"I", "x":8.5, "y":1}, {"label":"O", "x":9.5, "y":1}, {"label":"P", "x":10.5, "y":1}, {"label":"{", "x":11.5, "y":1}, {"label":"}", "x":12.5, "y":1}, {"label":"|", "x":13.5, "y":1, "w":1.5}, {"label":"Caps Lock", "x":0, "y":2, "w":1.75}, {"label":"A", "x":1.75, "y":2}, {"label":"S", "x":2.75, "y":2}, {"label":"D", "x":3.75, "y":2}, {"label":"F", "x":4.75, "y":2}, {"label":"G", "x":5.75, "y":2}, {"label":"H", "x":6.75, "y":2}, {"label":"J", "x":7.75, "y":2}, {"label":"K", "x":8.75, "y":2}, {"label":"L", "x":9.75, "y":2}, {"label":":", "x":10.75, "y":2}, {"label":"\"", "x":11.75, "y":2}, {"label":"Enter", "x":12.75, "y":2, "w":2.25}, {"label":"Shift", "x":0, "y":3, "w":2.25}, {"label":"Z", "x":2.25, "y":3}, {"label":"X", "x":3.25, "y":3}, {"label":"C", "x":4.25, "y":3}, {"label":"V", "x":5.25, "y":3}, {"label":"B", "x":6.25, "y":3}, {"label":"N", "x":7.25, "y":3}, {"label":"M", "x":8.25, "y":3}, {"label":"<", "x":9.25, "y":3}, {"label":">", "x":10.25, "y":3}, {"label":"?", "x":11.25, "y":3}, {"label":"Shift", "x":12.25, "y":3, "w":1.75}, {"label":"Fn", "x":14, "y":3}, {"label":"Ctrl", "x":0, "y":4, "w":1.5}, {"label":"Win", "x":1.5, "y":4}, {"label":"Alt", "x":2.5, "y":4, "w":1.5}, {"x":4, "y":4, "w":7}, {"label":"Alt", "x":11, "y":4, "w":1.5}, {"label":"Win", "x":12.5, "y":4}, {"label":"Ctrl", "x":13.5, "y":4, "w":1.5}]
+        "LAYOUT_2x3u": {
+            "layout": [
+                { "label": "Esc", "x": 0, "y": 0 },
+                { "label": "!", "x": 1, "y": 0 },
+                { "label": "@", "x": 2, "y": 0 },
+                { "label": "#", "x": 3, "y": 0 },
+                { "label": "$", "x": 4, "y": 0 },
+                { "label": "%", "x": 5, "y": 0 },
+                { "label": "^", "x": 6, "y": 0 },
+                { "label": "&", "x": 7, "y": 0 },
+                { "label": "*", "x": 8, "y": 0 },
+                { "label": "(", "x": 9, "y": 0 },
+                { "label": ")", "x": 10, "y": 0 },
+                { "label": "_", "x": 11, "y": 0 },
+                { "label": "+", "x": 12, "y": 0 },
+                { "label": "~", "x": 13, "y": 0 },
+                { "label": "Bksp", "x": 14, "y": 0 },
+                { "label": "Tab", "w": 1.5, "x": 0, "y": 1 },
+                { "label": "Q", "x": 1.5, "y": 1 },
+                { "label": "W", "x": 2.5, "y": 1 },
+                { "label": "E", "x": 3.5, "y": 1 },
+                { "label": "R", "x": 4.5, "y": 1 },
+                { "label": "T", "x": 5.5, "y": 1 },
+                { "label": "Y", "x": 6.5, "y": 1 },
+                { "label": "U", "x": 7.5, "y": 1 },
+                { "label": "I", "x": 8.5, "y": 1 },
+                { "label": "O", "x": 9.5, "y": 1 },
+                { "label": "P", "x": 10.5, "y": 1 },
+                { "label": "{", "x": 11.5, "y": 1 },
+                { "label": "}", "x": 12.5, "y": 1 },
+                { "label": "|", "w": 1.5, "x": 13.5, "y": 1 },
+                { "label": "Caps Lock", "w": 1.75, "x": 0, "y": 2 },
+                { "label": "A", "x": 1.75, "y": 2 },
+                { "label": "S", "x": 2.75, "y": 2 },
+                { "label": "D", "x": 3.75, "y": 2 },
+                { "label": "F", "x": 4.75, "y": 2 },
+                { "label": "G", "x": 5.75, "y": 2 },
+                { "label": "H", "x": 6.75, "y": 2 },
+                { "label": "J", "x": 7.75, "y": 2 },
+                { "label": "K", "x": 8.75, "y": 2 },
+                { "label": "L", "x": 9.75, "y": 2 },
+                { "label": ":", "x": 10.75, "y": 2 },
+                { "label": "\"", "x": 11.75, "y": 2 },
+                { "label": "Enter", "w": 2.25, "x": 12.75, "y": 2 },
+                { "label": "Shift", "w": 2.25, "x": 0, "y": 3 },
+                { "label": "Z", "x": 2.25, "y": 3 },
+                { "label": "X", "x": 3.25, "y": 3 },
+                { "label": "C", "x": 4.25, "y": 3 },
+                { "label": "V", "x": 5.25, "y": 3 },
+                { "label": "B", "x": 6.25, "y": 3 },
+                { "label": "N", "x": 7.25, "y": 3 },
+                { "label": "M", "x": 8.25, "y": 3 },
+                { "label": "<", "x": 9.25, "y": 3 },
+                { "label": ">", "x": 10.25, "y": 3 },
+                { "label": "?", "x": 11.25, "y": 3 },
+                { "label": "Shift", "w": 1.75, "x": 12.25, "y": 3 },
+                { "label": "Fn", "x": 14, "y": 3 },
+                { "label": "Ctrl", "w": 1.5, "x": 0, "y": 4 },
+                { "label": "Win", "x": 1.5, "y": 4 },
+                { "label": "Alt", "w": 1.5, "x": 2.5, "y": 4 },
+                { "w": 3, "x": 4, "y": 4 },
+                { "x": 7, "y": 4 },
+                { "w": 3, "x": 8, "y": 4 },
+                { "label": "Alt", "w": 1.5, "x": 11, "y": 4 },
+                { "label": "Win", "x": 12.5, "y": 4 },
+                { "label": "Ctrl", "w": 1.5, "x": 13.5, "y": 4 }
+            ]
         }
     }
 }
diff --git a/keyboards/crkbd/keymaps/devdev/config.h b/keyboards/crkbd/keymaps/devdev/config.h
index 793c7b020..c858f8f2d 100644
--- a/keyboards/crkbd/keymaps/devdev/config.h
+++ b/keyboards/crkbd/keymaps/devdev/config.h
@@ -32,7 +32,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define CUSTOM_FONT
 
-#define CUSTOM_LAYER_READ //if you remove this it causes issues - needs better guarding 
+#define CUSTOM_LAYER_READ //if you remove this it causes issues - needs better guarding
 
 #define TAPPING_FORCE_HOLD
 #define TAPPING_TERM 200
@@ -43,7 +43,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #ifdef RGBLIGHT_ENABLE
     #undef RGBLED_NUM
-        
+
     //#define RGBLIGHT_ANIMATIONS
         #define RGBLIGHT_EFFECT_BREATHING
         #define RGBLIGHT_EFFECT_RAINBOW_MOOD
@@ -55,11 +55,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
         //#define RGBLIGHT_EFFECT_RGB_TEST
         //#define RGBLIGHT_EFFECT_ALTERNATING
         //#define RGBLIGHT_EFFECT_TWINKLE
-        
+
     //#define RGBLED_NUM 54
         //#define RGBLED_SPLIT 27
-        //#define RGBLED_SPLIT { 27, 27 } // haven't figured out how to use this yet 
-        
+        //#define RGBLED_SPLIT { 27, 27 } // haven't figured out how to use this yet
+
         #define RGBLED_NUM 27
     #define RGBLIGHT_LIMIT_VAL 120
     #define RGBLIGHT_HUE_STEP 10
@@ -71,11 +71,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #   define RGB_MATRIX_KEYPRESSES // reacts to keypresses
 // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#   define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#   define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #   define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 // #   define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 // #   define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
-#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150 // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash. 
+#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150 // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash.
 
 #define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_GRADIENT_LEFT_RIGHT
 
diff --git a/keyboards/crkbd/keymaps/gotham/config.h b/keyboards/crkbd/keymaps/gotham/config.h
index dd58a0fe0..05b04e0aa 100644
--- a/keyboards/crkbd/keymaps/gotham/config.h
+++ b/keyboards/crkbd/keymaps/gotham/config.h
@@ -39,7 +39,7 @@
 
 #ifdef RGB_MATRIX_ENABLE
 #    define RGB_MATRIX_KEYPRESSES                // reacts to keypresses
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true  // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED  // turn off effects when suspended
 #    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150    // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash.
 #    define RGB_MATRIX_HUE_STEP 32
 #    define RGB_MATRIX_SAT_STEP 64
diff --git a/keyboards/crkbd/keymaps/kidbrazil/config.h b/keyboards/crkbd/keymaps/kidbrazil/config.h
index be1777e57..752ea862e 100644
--- a/keyboards/crkbd/keymaps/kidbrazil/config.h
+++ b/keyboards/crkbd/keymaps/kidbrazil/config.h
@@ -56,7 +56,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
     //#   define RGB_MATRIX_KEYPRESSES // reacts to keypresses
     // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
     // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-    #define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+    #define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
     #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
     // #   define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
     // #   define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
diff --git a/keyboards/crkbd/keymaps/rpbaptist/config.h b/keyboards/crkbd/keymaps/rpbaptist/config.h
index 6bd16725f..9e5f75c36 100644
--- a/keyboards/crkbd/keymaps/rpbaptist/config.h
+++ b/keyboards/crkbd/keymaps/rpbaptist/config.h
@@ -42,7 +42,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define NO_ACTION_ONESHOT
 
 #ifdef RGB_MATRIX_ENABLE
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true  // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED  // turn off effects when suspended
 #    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150
 
 #    define RGB_MATRIX_HUE_STEP 8
diff --git a/keyboards/crkbd/keymaps/soundmonster/config.h b/keyboards/crkbd/keymaps/soundmonster/config.h
index 1e58af3ab..8235b4869 100644
--- a/keyboards/crkbd/keymaps/soundmonster/config.h
+++ b/keyboards/crkbd/keymaps/soundmonster/config.h
@@ -59,11 +59,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #   define RGB_MATRIX_KEYPRESSES // reacts to keypresses
 // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#   define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#   define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #   define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #   define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 #   define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
-#   define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150 // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash. 
+#   define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150 // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash.
 #   define RGB_MATRIX_HUE_STEP 8
 #   define RGB_MATRIX_SAT_STEP 8
 #   define RGB_MATRIX_VAL_STEP 8
diff --git a/keyboards/crkbd/readme.md b/keyboards/crkbd/readme.md
index 1e5bfb39a..f0b5672cf 100644
--- a/keyboards/crkbd/readme.md
+++ b/keyboards/crkbd/readme.md
@@ -38,7 +38,7 @@ And in your `config.h` file, add the following:
 #   define RGB_MATRIX_KEYPRESSES // reacts to keypresses
 // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#   define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#   define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #   define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 // #   define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 // #   define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
diff --git a/keyboards/draculad/config.h b/keyboards/draculad/config.h
index 8a27fdea4..d8a9fbd37 100644
--- a/keyboards/draculad/config.h
+++ b/keyboards/draculad/config.h
@@ -65,3 +65,5 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define UNUSED_PINS
 
 #define EE_HANDS
+
+#define LAYER_STATE_8BIT
\ No newline at end of file
diff --git a/keyboards/draculad/keymaps/pimoroni/keymap.c b/keyboards/draculad/keymaps/pimoroni/keymap.c
index 87cbe3cd3..762ae26c7 100644
--- a/keyboards/draculad/keymaps/pimoroni/keymap.c
+++ b/keyboards/draculad/keymaps/pimoroni/keymap.c
@@ -16,7 +16,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include QMK_KEYBOARD_H
-#include "pimoroni_trackball.h"
+#include "drivers/sensors/pimoroni_trackball.h"
 #include "pointing_device.h"
 
 
diff --git a/keyboards/draculad/keymaps/pimoroni/pimoroni_trackball.h b/keyboards/draculad/keymaps/pimoroni/pimoroni_trackball.h
deleted file mode 100644
index cfcd5a47a..000000000
--- a/keyboards/draculad/keymaps/pimoroni/pimoroni_trackball.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/* Copyright 2020 Christopher Courtney, aka Drashna Jael're  (@drashna) <drashna@live.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include "quantum.h"
-#include "pointing_device.h"
-
-#ifndef TRACKBALL_ADDRESS
-#    define TRACKBALL_ADDRESS 0x0A
-#endif
-#define TRACKBALL_WRITE ((TRACKBALL_ADDRESS << 1) | I2C_WRITE)
-#define TRACKBALL_READ  ((TRACKBALL_ADDRESS << 1) | I2C_READ)
-
-void trackball_set_rgbw(uint8_t red, uint8_t green, uint8_t blue, uint8_t white);
-void trackball_check_click(bool pressed, report_mouse_t *mouse);
-void trackball_register_button(bool pressed, enum mouse_buttons button);
-
-float trackball_get_precision(void);
-void    trackball_set_precision(float precision);
-bool    trackball_is_scrolling(void);
-void    trackball_set_scrolling(bool scroll);
\ No newline at end of file
diff --git a/keyboards/draculad/keymaps/pimoroni/rules.mk b/keyboards/draculad/keymaps/pimoroni/rules.mk
index 547a02f26..d8dc92fbf 100644
--- a/keyboards/draculad/keymaps/pimoroni/rules.mk
+++ b/keyboards/draculad/keymaps/pimoroni/rules.mk
@@ -1,6 +1,6 @@
 # only uncomment on the side you have your trackball on
 POINTING_DEVICE_ENABLE = yes
-SRC += pimoroni_trackball.c
+SRC += drivers/sensors/pimoroni_trackball.c
 QUANTUM_LIB_SRC += i2c_master.c
 OLED_DRIVER_ENABLE = yes
 MOUSEKEY_ENABLE = no
diff --git a/keyboards/dztech/dz60rgb/v1/config.h b/keyboards/dztech/dz60rgb/v1/config.h
index 6e5b3da6f..f6ee7c4e2 100644
--- a/keyboards/dztech/dz60rgb/v1/config.h
+++ b/keyboards/dztech/dz60rgb/v1/config.h
@@ -37,7 +37,7 @@
 
 #ifdef RGB_MATRIX_ENABLE
 #    define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    define RGB_MATRIX_KEYPRESSES
 #    define RGB_MATRIX_LED_PROCESS_LIMIT 4
 #    define RGB_MATRIX_LED_FLUSH_LIMIT 26
diff --git a/keyboards/dztech/dz60rgb/v2/config.h b/keyboards/dztech/dz60rgb/v2/config.h
index df84fff59..6108e9903 100644
--- a/keyboards/dztech/dz60rgb/v2/config.h
+++ b/keyboards/dztech/dz60rgb/v2/config.h
@@ -37,7 +37,7 @@
 
 #ifdef RGB_MATRIX_ENABLE
 #    define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    define RGB_MATRIX_KEYPRESSES
 #    define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #    define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
diff --git a/keyboards/dztech/dz60rgb_ansi/v1/config.h b/keyboards/dztech/dz60rgb_ansi/v1/config.h
index 8710f8d07..dc2a6f4bc 100644
--- a/keyboards/dztech/dz60rgb_ansi/v1/config.h
+++ b/keyboards/dztech/dz60rgb_ansi/v1/config.h
@@ -37,7 +37,7 @@
 
 #ifdef RGB_MATRIX_ENABLE
 #    define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    define RGB_MATRIX_KEYPRESSES
 #    define RGB_MATRIX_LED_PROCESS_LIMIT 4
 #    define RGB_MATRIX_LED_FLUSH_LIMIT 26
diff --git a/keyboards/dztech/dz60rgb_ansi/v2/config.h b/keyboards/dztech/dz60rgb_ansi/v2/config.h
index f3c9b73fb..6c1e00682 100644
--- a/keyboards/dztech/dz60rgb_ansi/v2/config.h
+++ b/keyboards/dztech/dz60rgb_ansi/v2/config.h
@@ -37,7 +37,7 @@
 
 #ifdef RGB_MATRIX_ENABLE
 #    define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    define RGB_MATRIX_KEYPRESSES
 #    define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #    define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
diff --git a/keyboards/dztech/dz60rgb_wkl/v1/config.h b/keyboards/dztech/dz60rgb_wkl/v1/config.h
index 9c630c75b..12317c2d3 100644
--- a/keyboards/dztech/dz60rgb_wkl/v1/config.h
+++ b/keyboards/dztech/dz60rgb_wkl/v1/config.h
@@ -37,7 +37,7 @@
 
 #ifdef RGB_MATRIX_ENABLE
 #    define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    define RGB_MATRIX_KEYPRESSES
 #    define RGB_MATRIX_LED_PROCESS_LIMIT 4
 #    define RGB_MATRIX_LED_FLUSH_LIMIT 26
diff --git a/keyboards/dztech/dz60rgb_wkl/v2/config.h b/keyboards/dztech/dz60rgb_wkl/v2/config.h
index a6145c274..945b591ce 100644
--- a/keyboards/dztech/dz60rgb_wkl/v2/config.h
+++ b/keyboards/dztech/dz60rgb_wkl/v2/config.h
@@ -37,7 +37,7 @@
 
 #ifdef RGB_MATRIX_ENABLE
 #    define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    define RGB_MATRIX_KEYPRESSES
 #    define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #    define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
diff --git a/keyboards/dztech/dz65rgb/v1/config.h b/keyboards/dztech/dz65rgb/v1/config.h
index adfa934b0..1ecd9002c 100644
--- a/keyboards/dztech/dz65rgb/v1/config.h
+++ b/keyboards/dztech/dz65rgb/v1/config.h
@@ -51,9 +51,9 @@
 #    define RGB_MATRIX_LED_FLUSH_LIMIT 26
 #    define DEBOUNCE 3
 #    define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    define RGB_MATRIX_KEYPRESSES
-#    define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN 
+#    define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
 #    define DISABLE_RGB_MATRIX_BAND_SAT
 #    define DISABLE_RGB_MATRIX_BAND_PINWHEEL_SAT
 #    define DISABLE_RGB_MATRIX_BAND_SPIRAL_SAT
diff --git a/keyboards/dztech/dz65rgb/v2/config.h b/keyboards/dztech/dz65rgb/v2/config.h
index f86d65cd0..1e1e21f5e 100644
--- a/keyboards/dztech/dz65rgb/v2/config.h
+++ b/keyboards/dztech/dz65rgb/v2/config.h
@@ -51,7 +51,7 @@
 #    define RGB_MATRIX_LED_FLUSH_LIMIT 26
 #    define DEBOUNCE 3
 #    define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    define RGB_MATRIX_KEYPRESSES
 #    define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
 #    define DISABLE_RGB_MATRIX_BAND_SAT
diff --git a/keyboards/ergodox_ez/config.h b/keyboards/ergodox_ez/config.h
index bc63f6108..9dcfc341e 100644
--- a/keyboards/ergodox_ez/config.h
+++ b/keyboards/ergodox_ez/config.h
@@ -129,7 +129,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGB_MATRIX_LED_PROCESS_LIMIT 5
 #define RGB_MATRIX_LED_FLUSH_LIMIT 26
 
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
 
 // #define RGBLIGHT_COLOR_LAYER_0 0x00, 0x00, 0xFF
 /* #define RGBLIGHT_COLOR_LAYER_1 0x00, 0x00, 0xFF */
diff --git a/keyboards/ergodox_ez/keymaps/hacker_dvorak/config.h b/keyboards/ergodox_ez/keymaps/hacker_dvorak/config.h
index a0ba655ed..da2082078 100644
--- a/keyboards/ergodox_ez/keymaps/hacker_dvorak/config.h
+++ b/keyboards/ergodox_ez/keymaps/hacker_dvorak/config.h
@@ -14,7 +14,7 @@
 #undef  IGNORE_MOD_TAP_INTERRUPT
 #define IGNORE_MOD_TAP_INTERRUPT
 
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
 
 #undef  FORCE_NKRO
 #define FORCE_NKRO
diff --git a/keyboards/ergodox_infinity/config.h b/keyboards/ergodox_infinity/config.h
index a64f3f4a1..a00c593ee 100644
--- a/keyboards/ergodox_infinity/config.h
+++ b/keyboards/ergodox_infinity/config.h
@@ -62,6 +62,21 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define LED_BRIGHTNESS_LO       100
 #define LED_BRIGHTNESS_HI       255
 
+/* LED matrix driver */
+#define LED_DRIVER_ADDR_1 0x74
+#define LED_DRIVER_COUNT 1
+#define DRIVER_LED_TOTAL 76
+#define LED_MATRIX_SPLIT { 38, 38 }
+#define LED_DISABLE_WHEN_USB_SUSPENDED
+
+/* i2c (for LED matrix) */
+#define I2C1_CLOCK_SPEED 400000
+#define I2C1_SCL_PAL_MODE PAL_MODE_ALTERNATIVE_2
+#define I2C1_SDA_PAL_MODE PAL_MODE_ALTERNATIVE_2
+#define I2C1_BANK GPIOB
+#define I2C1_SCL 0
+#define I2C1_SDA 1
+
 /* define if matrix has ghost */
 //#define MATRIX_HAS_GHOST
 
diff --git a/keyboards/ergodox_infinity/ergodox_infinity.c b/keyboards/ergodox_infinity/ergodox_infinity.c
index 97b628470..da8ea311a 100644
--- a/keyboards/ergodox_infinity/ergodox_infinity.c
+++ b/keyboards/ergodox_infinity/ergodox_infinity.c
@@ -1,20 +1,45 @@
 #include QMK_KEYBOARD_H
 #include <ch.h>
 #include <hal.h>
+#include <string.h>
+#include "eeconfig.h"
 #include "serial_link/system/serial_link.h"
 #ifdef VISUALIZER_ENABLE
-#include "lcd_backlight.h"
+#    include "lcd_backlight.h"
 #endif
 
-#ifdef WPM_ENABLE
-#   include "serial_link/protocol/transport.h"
-#   include "wpm.h"
+#if (defined(LED_MATRIX_ENABLE) || defined(WPM_ENABLE))
+#    include "serial_link/protocol/transport.h"
+
+#    ifdef LED_MATRIX_ENABLE
+MASTER_TO_ALL_SLAVES_OBJECT(led_matrix, led_eeconfig_t);
+MASTER_TO_ALL_SLAVES_OBJECT(led_suspend_state, bool);
+static led_eeconfig_t last_sent_led_matrix;
+static uint16_t       led_matrix_sent_timer = 0;
+
+void send_led_suspend_state(void) {
+    if (is_serial_link_master()) {
+        *begin_write_led_suspend_state() = led_matrix_get_suspend_state();
+        end_write_led_suspend_state();
+    }
+}
+#    endif
 
+#    ifdef WPM_ENABLE
+#        include "wpm.h"
 MASTER_TO_ALL_SLAVES_OBJECT(current_wpm, uint8_t);
-static remote_object_t* remote_objects[] = {
+static uint8_t last_sent_wpm = 0;
+#    endif
+
+static remote_object_t *remote_objects[] = {
+#    ifdef LED_MATRIX_ENABLE
+    REMOTE_OBJECT(led_matrix),
+    REMOTE_OBJECT(led_suspend_state),
+#    endif
+#    ifdef WPM_ENABLE
     REMOTE_OBJECT(current_wpm),
+#    endif
 };
-static uint8_t last_sent_wpm = 0;
 #endif
 
 void init_serial_link_hal(void) {
@@ -52,7 +77,7 @@ void init_serial_link_hal(void) {
 void lcd_backlight_hal_init(void) {
     // Setup Backlight
     SIM->SCGC6 |= SIM_SCGC6_FTM0;
-    FTM0->CNT = 0; // Reset counter
+    FTM0->CNT = 0;  // Reset counter
 
     // PWM Period
     // 16-bit maximum
@@ -60,25 +85,25 @@ void lcd_backlight_hal_init(void) {
 
     // Set FTM to PWM output - Edge Aligned, Low-true pulses
 #define CNSC_MODE FTM_SC_CPWMS | FTM_SC_PS(4) | FTM_SC_CLKS(0)
-    CHANNEL_RED.CnSC = CNSC_MODE;
+    CHANNEL_RED.CnSC   = CNSC_MODE;
     CHANNEL_GREEN.CnSC = CNSC_MODE;
-    CHANNEL_BLUE.CnSC = CNSC_MODE;
+    CHANNEL_BLUE.CnSC  = CNSC_MODE;
 
     // System clock, /w prescalar setting
     FTM0->SC = FTM_SC_CLKS(1) | FTM_SC_PS(PRESCALAR_DEFINE);
 
-    CHANNEL_RED.CnV = 0;
+    CHANNEL_RED.CnV   = 0;
     CHANNEL_GREEN.CnV = 0;
-    CHANNEL_BLUE.CnV = 0;
+    CHANNEL_BLUE.CnV  = 0;
 
     RGB_PORT_GPIO->PDDR |= (1 << RED_PIN);
     RGB_PORT_GPIO->PDDR |= (1 << GREEN_PIN);
     RGB_PORT_GPIO->PDDR |= (1 << BLUE_PIN);
 
 #define RGB_MODE PORTx_PCRn_SRE | PORTx_PCRn_DSE | PORTx_PCRn_MUX(4)
-    RGB_PORT->PCR[RED_PIN] = RGB_MODE;
+    RGB_PORT->PCR[RED_PIN]   = RGB_MODE;
     RGB_PORT->PCR[GREEN_PIN] = RGB_MODE;
-    RGB_PORT->PCR[BLUE_PIN] = RGB_MODE;
+    RGB_PORT->PCR[BLUE_PIN]  = RGB_MODE;
 }
 
 static uint16_t cie_lightness(uint16_t v) {
@@ -89,12 +114,11 @@ static uint16_t cie_lightness(uint16_t v) {
     // Y = (L* / 902.3)           if L* <= 8
     // Y = ((L* + 16) / 116)^3    if L* > 8
 
-    float l =  100.0f * (v / 65535.0f);
+    float l = 100.0f * (v / 65535.0f);
     float y = 0.0f;
     if (l <= 8.0f) {
-       y = l / 902.3;
-    }
-    else {
+        y = l / 902.3;
+    } else {
         y = ((l + 16.0f) / 116.0f);
         y = y * y * y;
         if (y > 1.0f) {
@@ -105,31 +129,48 @@ static uint16_t cie_lightness(uint16_t v) {
 }
 
 void lcd_backlight_hal_color(uint16_t r, uint16_t g, uint16_t b) {
-    CHANNEL_RED.CnV = cie_lightness(r);
+    CHANNEL_RED.CnV   = cie_lightness(r);
     CHANNEL_GREEN.CnV = cie_lightness(g);
-    CHANNEL_BLUE.CnV = cie_lightness(b);
+    CHANNEL_BLUE.CnV  = cie_lightness(b);
 }
 
-__attribute__ ((weak))
-void matrix_init_user(void) {
-}
+__attribute__ ((weak)) void matrix_init_user(void) {}
+
+__attribute__ ((weak)) void matrix_scan_user(void) {}
 
-__attribute__ ((weak))
-void matrix_scan_user(void) {
-}
 
+void keyboard_pre_init_kb() {
+#ifdef LED_MATRIX_ENABLE
+    // Turn on LED controller
+    setPinOutput(B16);
+    writePinHigh(B16);
+#endif
+    keyboard_pre_init_user();
+}
 
 void matrix_init_kb(void) {
     // put your keyboard start-up code here
     // runs once when the firmware starts up
 
+#ifdef LED_MATRIX_ENABLE
+    /*
+     * Since K20x is stuck with a 32 byte EEPROM (see tmk_core/common/chibios/eeprom_teensy.c),
+     * and neither led_matrix_eeconfig.speed or .flags fit in this boundary, just force their values to default on boot.
+     */
+#    if !defined(LED_MATRIX_STARTUP_SPD)
+#        define LED_MATRIX_STARTUP_SPD UINT8_MAX / 2
+#    endif
+    led_matrix_set_speed(LED_MATRIX_STARTUP_SPD);
+    led_matrix_set_flags(LED_FLAG_ALL);
+#endif
+
     matrix_init_user();
     // The backlight always has to be initialized, otherwise it will stay lit
 #ifndef VISUALIZER_ENABLE
     lcd_backlight_hal_init();
 #endif
-#ifdef WPM_ENABLE
-    add_remote_objects(remote_objects, sizeof(remote_objects) / sizeof(remote_object_t*));
+#if (defined(LED_MATRIX_ENABLE) || defined(WPM_ENABLE))
+    add_remote_objects(remote_objects, sizeof(remote_objects) / sizeof(remote_object_t *));
 #endif
 }
 
@@ -137,6 +178,30 @@ void matrix_scan_kb(void) {
     // put your looping keyboard code here
     // runs every cycle (a lot)
 
+#ifdef LED_MATRIX_ENABLE
+    if (is_serial_link_master()) {
+        if (!led_matrix_get_suspend_state()) {
+            if (timer_elapsed(led_matrix_sent_timer) >= 5000 || memcmp((void *)&last_sent_led_matrix, (void *)&led_matrix_eeconfig, sizeof(last_sent_led_matrix))) {
+                led_matrix_sent_timer = timer_read();
+                memcpy((void *)&last_sent_led_matrix, (void *)&led_matrix_eeconfig, sizeof(last_sent_led_matrix));
+                *begin_write_led_matrix() = last_sent_led_matrix;
+                end_write_led_matrix();
+            }
+        }
+    } else if (is_serial_link_connected()) {
+        bool *new_led_suspend_state = read_led_suspend_state();
+        if (new_led_suspend_state) {
+            led_matrix_set_suspend_state(*new_led_suspend_state);
+        }
+        if (!led_matrix_get_suspend_state()) {
+            led_eeconfig_t *new_led_matrix = read_led_matrix();
+            if (new_led_matrix) {
+                memcpy((void *)&led_matrix_eeconfig, (void *)new_led_matrix, sizeof(last_sent_led_matrix));
+            }
+        }
+    }
+#endif
+
 #ifdef WPM_ENABLE
     if (is_serial_link_master()) {
         uint8_t current_wpm = get_current_wpm();
@@ -146,67 +211,68 @@ void matrix_scan_kb(void) {
             last_sent_wpm = current_wpm;
         }
     } else if (is_serial_link_connected()) {
-        uint8_t* new_wpm = read_current_wpm();
+        uint8_t *new_wpm = read_current_wpm();
         if (new_wpm) {
             set_current_wpm(*new_wpm);
         }
     }
 #endif
+
     matrix_scan_user();
 }
 
-bool is_keyboard_master(void) {
-    return is_serial_link_master();
-}
+bool is_keyboard_master(void) { return is_serial_link_master(); }
 
-__attribute__ ((weak))
-void ergodox_board_led_on(void){
+bool is_keyboard_left(void) {
+#if defined(EE_HANDS)
+    return eeconfig_read_handedness();
+#elif defined(MASTER_IS_ON_RIGHT)
+    return !is_keyboard_master();
+#else
+    return is_keyboard_master();
+#endif
 }
 
-__attribute__ ((weak))
-void ergodox_right_led_1_on(void){
-}
+__attribute__ ((weak)) void ergodox_board_led_on(void) {}
 
-__attribute__ ((weak))
-void ergodox_right_led_2_on(void){
-}
+__attribute__ ((weak)) void ergodox_right_led_1_on(void) {}
 
-__attribute__ ((weak))
-void ergodox_right_led_3_on(void){
-}
+__attribute__ ((weak)) void ergodox_right_led_2_on(void) {}
 
-__attribute__ ((weak))
-void ergodox_board_led_off(void){
-}
+__attribute__ ((weak)) void ergodox_right_led_3_on(void) {}
 
-__attribute__ ((weak))
-void ergodox_right_led_1_off(void){
-}
+__attribute__ ((weak)) void ergodox_board_led_off(void) {}
 
-__attribute__ ((weak))
-void ergodox_right_led_2_off(void){
-}
+__attribute__ ((weak)) void ergodox_right_led_1_off(void) {}
 
-__attribute__ ((weak))
-void ergodox_right_led_3_off(void){
-}
+__attribute__ ((weak)) void ergodox_right_led_2_off(void) {}
 
-__attribute__ ((weak))
-void ergodox_right_led_1_set(uint8_t n) {
-}
+__attribute__ ((weak)) void ergodox_right_led_3_off(void) {}
 
-__attribute__ ((weak))
-void ergodox_right_led_2_set(uint8_t n) {
+__attribute__ ((weak)) void ergodox_right_led_1_set(uint8_t n) {}
+
+__attribute__ ((weak)) void ergodox_right_led_2_set(uint8_t n) {}
+
+__attribute__ ((weak)) void ergodox_right_led_3_set(uint8_t n) {}
+
+void suspend_power_down_kb(void) {
+#ifdef LED_MATRIX_ENABLE
+    send_led_suspend_state();
+#endif
+    suspend_power_down_user();
 }
 
-__attribute__ ((weak))
-void ergodox_right_led_3_set(uint8_t n) {
+void suspend_wakeup_init_kb(void) {
+#ifdef LED_MATRIX_ENABLE
+    send_led_suspend_state();
+#endif
+    suspend_wakeup_init_user();
 }
 
 #ifdef SWAP_HANDS_ENABLE
 __attribute__ ((weak))
 const keypos_t PROGMEM hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
-    {{0, 9}, {1, 9}, {2, 9}, {3, 9}, {4, 9}},
+    {{0,  9}, {1,  9}, {2,  9}, {3,  9}, {4,  9}},
     {{0, 10}, {1, 10}, {2, 10}, {3, 10}, {4, 10}},
     {{0, 11}, {1, 11}, {2, 11}, {3, 11}, {4, 11}},
     {{0, 12}, {1, 12}, {2, 12}, {3, 12}, {4, 12}},
@@ -226,3 +292,115 @@ const keypos_t PROGMEM hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
     {{0, 8}, {1, 8}, {2, 8}, {3, 8}, {4, 8}},
 };
 #endif
+
+#ifdef LED_MATRIX_ENABLE
+const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
+// The numbers in the comments are the led numbers DXX on the PCB
+/* Refer to IS31 manual for these locations
+ *  driver
+ *  |   LED address
+ *  |   | */
+// Left half
+//      45           44           43           42           41           40           39
+   { 0, C2_2 }, { 0, C1_2 }, { 0, C5_1 }, { 0, C4_1 }, { 0, C3_1 }, { 0, C2_1 }, { 0, C1_1 },
+//      52           51           50           49           48           47           46
+   { 0, C4_3 }, { 0, C3_3 }, { 0, C2_3 }, { 0, C1_3 }, { 0, C5_2 }, { 0, C4_2 }, { 0, C3_2 },
+//      58           57           56           55           54           53
+   { 0, C5_4 }, { 0, C4_4 }, { 0, C3_4 }, { 0, C2_4 }, { 0, C1_4 }, { 0, C5_3 },
+//      67           66           65           64           63           62           61
+   { 0, C4_6 }, { 0, C3_6 }, { 0, C2_6 }, { 0, C1_6 }, { 0, C5_5 }, { 0, C4_5 }, { 0, C3_5 },
+//      76           75           74           73           72
+   { 0, C4_8 }, { 0, C3_8 }, { 0, C2_8 }, { 0, C1_8 }, { 0, C4_7 },
+//                                                                                    60           59
+                                                                                 { 0, C2_5 }, { 0, C1_5 },
+//                                                                                                 68
+                                                                                              { 0, C5_6 },
+//                                                                       71           70           69
+                                                                    { 0, C3_7 }, { 0, C2_7 }, { 0, C1_7 },
+// Right half (mirrored)
+// Due to how LED_MATRIX_SPLIT is implemented, only the first half of g_is31_leds is actually used.
+// Luckily, the right half has the same LED pinouts, just mirrored.
+//      45           44           43           42           41           40           39
+   { 0, C2_2 }, { 0, C1_2 }, { 0, C5_1 }, { 0, C4_1 }, { 0, C3_1 }, { 0, C2_1 }, { 0, C1_1 },
+//      52           51           50           49           48           47           46
+   { 0, C4_3 }, { 0, C3_3 }, { 0, C2_3 }, { 0, C1_3 }, { 0, C5_2 }, { 0, C4_2 }, { 0, C3_2 },
+//      58           57           56           55           54           53
+   { 0, C5_4 }, { 0, C4_4 }, { 0, C3_4 }, { 0, C2_4 }, { 0, C1_4 }, { 0, C5_3 },
+//      67           66           65           64           63           62           61
+   { 0, C4_6 }, { 0, C3_6 }, { 0, C2_6 }, { 0, C1_6 }, { 0, C5_5 }, { 0, C4_5 }, { 0, C3_5 },
+//      76           75           74           73           72
+   { 0, C4_8 }, { 0, C3_8 }, { 0, C2_8 }, { 0, C1_8 }, { 0, C4_7 },
+//                                                                                    60           59
+                                                                                 { 0, C2_5 }, { 0, C1_5 },
+//                                                                                                 68
+                                                                                              { 0, C5_6 },
+//                                                                       71           70           69
+                                                                    { 0, C3_7 }, { 0, C2_7 }, { 0, C1_7 },
+};
+
+led_config_t g_led_config = {
+    {
+        // Key Matrix to LED Index
+        // Left half
+        { NO_LED, NO_LED, NO_LED,     33,     34 },
+        { NO_LED, NO_LED, NO_LED,     32,     37 },
+        {      6,     13, NO_LED,     26,     36 },
+        {      5,     12,     19,     25,     35 },
+        {      4,     11,     18,     24,     31 },
+        {      3,     10,     17,     23,     30 },
+        {      2,      9,     16,     22,     29 },
+        {      1,      8,     15,     21,     28 },
+        {      0,      7,     14,     20,     27 },
+        // Right half
+        { NO_LED, NO_LED, NO_LED,     71,     72 },
+        { NO_LED, NO_LED, NO_LED,     70,     75 },
+        {     44,     51, NO_LED,     64,     74 },
+        {     43,     50,     57,     63,     73 },
+        {     42,     49,     56,     62,     69 },
+        {     41,     48,     55,     61,     68 },
+        {     40,     47,     54,     60,     67 },
+        {     39,     46,     53,     59,     66 },
+        {     38,     45,     52,     58,     65 },
+    }, {
+        // LED Index to Physical Position (assumes a reasonable gap between halves)
+        // Left half
+        {   0,  3 }, {  15,  3 }, {  27,  1 }, {  39,  0 }, {  51,  1 }, {  63,  2 }, {  75,  2 },
+        {   0, 13 }, {  15, 13 }, {  27, 11 }, {  39, 10 }, {  51, 11 }, {  63, 12 }, {  78, 17 },
+        {   0, 23 }, {  15, 23 }, {  27, 21 }, {  39, 20 }, {  51, 21 }, {  63, 22 },
+        {   0, 33 }, {  15, 33 }, {  27, 31 }, {  39, 30 }, {  51, 31 }, {  63, 32 }, {  78, 32 },
+        {   4, 43 }, {  15, 43 }, {  27, 41 }, {  39, 40 }, {  51, 41 },
+                                                                                      {  89, 41 }, { 100, 46 },
+                                                                                                   {  95, 55 },
+                                                                         {  72, 54 }, {  83, 59 }, {  90, 64 },
+        // Right half (mirrored)
+        { 224,  3 }, { 209,  3 }, { 197,  1 }, { 185,  0 }, { 173,  1 }, { 161,  2 }, { 149,  2 },
+        { 224, 13 }, { 209, 13 }, { 197, 11 }, { 185, 10 }, { 173, 11 }, { 161, 12 }, { 146, 17 },
+        { 224, 23 }, { 209, 23 }, { 197, 21 }, { 185, 20 }, { 173, 21 }, { 161, 22 },
+        { 224, 33 }, { 209, 33 }, { 197, 31 }, { 185, 30 }, { 173, 31 }, { 161, 32 }, { 146, 32 },
+        { 220, 43 }, { 209, 43 }, { 197, 41 }, { 185, 40 }, { 173, 41 },
+                                                                                      { 135, 41 }, { 124, 46 },
+                                                                                                   { 129, 55 },
+                                                                         { 152, 54 }, { 141, 59 }, { 134, 64 },
+    }, {
+        // LED Index to Flag
+        // Left half
+        1, 4, 4, 4, 4, 4, 1,
+        1, 4, 4, 4, 4, 4, 1,
+        1, 4, 4, 4, 4, 4,
+        1, 4, 4, 4, 4, 4, 1,
+        1, 1, 1, 1, 1,
+                          1, 1,
+                             1,
+                       1, 1, 1,
+        // Right half (mirrored)
+        1, 4, 4, 4, 4, 4, 1,
+        1, 4, 4, 4, 4, 4, 1,
+        1, 4, 4, 4, 4, 4,
+        1, 4, 4, 4, 4, 4, 1,
+        1, 1, 1, 1, 1,
+                          1, 1,
+                             1,
+                       1, 1, 1,
+    }
+};
+#endif
diff --git a/keyboards/ergodox_infinity/matrix.c b/keyboards/ergodox_infinity/matrix.c
index 7baacd24d..0fca56a97 100644
--- a/keyboards/ergodox_infinity/matrix.c
+++ b/keyboards/ergodox_infinity/matrix.c
@@ -24,7 +24,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "print.h"
 #include "debug.h"
 #include "matrix.h"
-#include "eeconfig.h"
+#include "keyboard.h"
 #include "serial_link/system/serial_link.h"
 
 
@@ -119,15 +119,9 @@ uint8_t matrix_scan(void)
     }
 
     uint8_t offset = 0;
-#if (defined(EE_HANDS) || defined(MASTER_IS_ON_RIGHT))
-#ifdef EE_HANDS
-    if (is_serial_link_master() && !eeconfig_read_handedness()) {
-#else
-    if (is_serial_link_master()) {
-#endif
+    if (is_serial_link_master() && !is_keyboard_left()) {
         offset = MATRIX_ROWS - LOCAL_MATRIX_ROWS;
     }
-#endif
 
     if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
         for (int row = 0; row < LOCAL_MATRIX_ROWS; row++) {
@@ -167,17 +161,11 @@ void matrix_print(void)
 
 void matrix_set_remote(matrix_row_t* rows, uint8_t index) {
     uint8_t offset = 0;
-#ifdef EE_HANDS
-    if (eeconfig_read_handedness()) {
+    if (is_keyboard_left()) {
         offset = LOCAL_MATRIX_ROWS * (index + 1);
     } else {
         offset = MATRIX_ROWS - LOCAL_MATRIX_ROWS * (index + 2);
     }
-#elif defined(MASTER_IS_ON_RIGHT)
-    offset = MATRIX_ROWS - LOCAL_MATRIX_ROWS * (index + 2);
-#else
-    offset = LOCAL_MATRIX_ROWS * (index + 1);
-#endif
     for (int row = 0; row < LOCAL_MATRIX_ROWS; row++) {
         matrix[offset + row] = rows[row];
     }
diff --git a/keyboards/ergodox_infinity/rules.mk b/keyboards/ergodox_infinity/rules.mk
index b9ead9e87..70bcabe80 100644
--- a/keyboards/ergodox_infinity/rules.mk
+++ b/keyboards/ergodox_infinity/rules.mk
@@ -22,8 +22,6 @@ CUSTOM_MATRIX = yes # Custom matrix file
 SERIAL_LINK_ENABLE = yes
 VISUALIZER_ENABLE = yes
 LCD_ENABLE = yes
-BACKLIGHT_ENABLE = yes
-BACKLIGHT_DRIVER = custom
 LCD_BACKLIGHT_ENABLE = yes
 MIDI_ENABLE = no
 RGBLIGHT_ENABLE = no
@@ -32,9 +30,8 @@ LCD_DRIVER = st7565
 LCD_WIDTH = 128
 LCD_HEIGHT = 32
 
-LED_DRIVER = is31fl3731c
-LED_WIDTH = 7
-LED_HEIGHT = 7
+LED_MATRIX_ENABLE = yes
+LED_MATRIX_DRIVER = IS31FL3731
 
 # project specific files
 SRC = matrix.c \
diff --git a/keyboards/geekboards/macropad_v2/config.h b/keyboards/geekboards/macropad_v2/config.h
index 5f11cdddb..d0e208f9b 100644
--- a/keyboards/geekboards/macropad_v2/config.h
+++ b/keyboards/geekboards/macropad_v2/config.h
@@ -41,7 +41,7 @@
 #define WS2812_DMA_CHANNEL 3
 
 #ifdef RGB_MATRIX_ENABLE
-#define RGB_MATRIX_KEYPRESSES 
+#define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #define DISABLE_RGB_MATRIX_ALPHAS_MODS
 #define DISABLE_RGB_MATRIX_BAND_SAT
@@ -67,7 +67,7 @@
 #define RGB_MATRIX_STARTUP_SPD 30
 #endif //RGB_MATRIX_ENABLE
 
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
 #define WAIT_FOR_USB
 
 /* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
diff --git a/keyboards/geekboards/tester/config.h b/keyboards/geekboards/tester/config.h
index 4f072c0ee..3e3daccd5 100644
--- a/keyboards/geekboards/tester/config.h
+++ b/keyboards/geekboards/tester/config.h
@@ -24,7 +24,7 @@
 #define DEBOUNCE 3
 #ifdef RGB_MATRIX_ENABLE
 #define RGB_DISABLE_AFTER_TIMEOUT 0
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
 #define RGB_MATRIX_KEYPRESSES
 #define DISABLE_RGB_MATRIX_SPLASH
 #define DISABLE_RGB_MATRIX_MULTISPLASH
@@ -36,4 +36,4 @@
 #define DRIVER_1_LED_TOTAL 8
 #define DRIVER_2_LED_TOTAL 0
 #define DRIVER_LED_TOTAL (DRIVER_1_LED_TOTAL + DRIVER_2_LED_TOTAL)
-#endif
\ No newline at end of file
+#endif
diff --git a/keyboards/gmmk/pro/config.h b/keyboards/gmmk/pro/config.h
index ab3c7a7a2..64062bece 100644
--- a/keyboards/gmmk/pro/config.h
+++ b/keyboards/gmmk/pro/config.h
@@ -46,3 +46,20 @@
 #define LOCKING_SUPPORT_ENABLE
 /* Locking resynchronize hack */
 #define LOCKING_RESYNC_ENABLE
+
+/* SPI Config for LED Driver */
+#define SPI_DRIVER SPID1
+#define SPI_SCK_PIN A5
+#define SPI_MOSI_PIN A6
+#define SPI_MISO_PIN A7
+
+#define DRIVER_1_CS B13
+#define DRIVER_2_CS B14
+#define DRIVER_1_EN C13
+#define DRIVER_2_EN C13
+
+#define DRIVER_COUNT 2
+#define DRIVER_1_LED_TOTAL 66
+#define DRIVER_2_LED_TOTAL 32
+#define DRIVER_LED_TOTAL (DRIVER_1_LED_TOTAL + DRIVER_2_LED_TOTAL)
+
diff --git a/keyboards/gmmk/pro/halconf.h b/keyboards/gmmk/pro/halconf.h
new file mode 100644
index 000000000..23ecb202a
--- /dev/null
+++ b/keyboards/gmmk/pro/halconf.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#define HAL_USE_SPI TRUE
+#define SPI_USE_WAIT TRUE
+#define SPI_SELECT_MODE SPI_SELECT_MODE_PAD
+
+#include_next <halconf.h>
diff --git a/keyboards/gmmk/pro/mcuconf.h b/keyboards/gmmk/pro/mcuconf.h
new file mode 100644
index 000000000..bb1c0acde
--- /dev/null
+++ b/keyboards/gmmk/pro/mcuconf.h
@@ -0,0 +1,6 @@
+#pragma once
+
+#include_next <mcuconf.h>
+
+#undef STM32_SPI_USE_SPI1
+#define STM32_SPI_USE_SPI1 TRUE
diff --git a/keyboards/gmmk/pro/pro.c b/keyboards/gmmk/pro/pro.c
index 816d089a5..9ed7ac886 100644
--- a/keyboards/gmmk/pro/pro.c
+++ b/keyboards/gmmk/pro/pro.c
@@ -14,3 +14,225 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include "pro.h"
+
+#ifdef RGB_MATRIX_ENABLE
+led_config_t g_led_config = { {
+    { 4,      NO_LED, NO_LED, 95,     65,     79, 5,      28 },
+    { 8,      2,      9,      0,      10,     75, 1,      7  },
+    { 14,     3,      15,     NO_LED, 16,     86, 6,      13 },
+    { 20,     18,     21,     23,     22,     94, 12,     19 },
+    { 25,     30,     26,     31,     27,     32, 29,     24 },
+    { 41,     36,     42,     37,     43,     38, 35,     40 },
+    { 46,     89,     47,     34,     48,     72, 78,     45 },
+    { 52,     39,     53,     97,     54,     82, 44,     51 },
+    { 58,     63,     59,     64,     NO_LED, 60, 62,     57 },
+    { 11,     90,     55,     17,     33,     49, NO_LED, 69 },
+    { NO_LED, 85,     93,     61,     96,     66, 50,     56 }
+}, {
+    { 0, 0 }, // 0, ESC, k13
+    { 0, 15 }, // 1, ~, k16
+    { 4, 26 }, // 2, Tab, k11
+    { 5, 38 }, // 3, Caps, k21
+    { 9, 49 }, // 4, Sh_L, k00
+    { 2, 61 }, // 5, Ct_L, k06
+    { 18, 0 }, // 6, F1, k26
+    { 14, 15 }, // 7, 1, k17
+    { 22, 26 }, // 8, Q, k10
+    { 25, 38 }, // 9, A, k12
+    { 33, 49 }, // 10, Z, k14
+    { 20, 61 }, // 11, Win_L, k90
+    { 33, 0 }, // 12, F2, k36
+    { 29, 15 }, // 13, 2, k27
+    { 36, 26 }, // 14, W, k20
+    { 40, 38 }, // 15, S, k22
+    { 47, 49 }, // 16, X, k24
+    { 38, 61 }, // 17, Alt_L, k93
+    { 47, 0 }, // 18, F3, k31
+    { 43, 15 }, // 19, 3, k37
+    { 51, 26 }, // 20, E, k30
+    { 54, 38 }, // 21, D, k32
+    { 61, 49 }, // 22, C, k34
+    { 61, 0 }, // 23, F4, k33
+    { 58, 15 }, // 24, 4, k47
+    { 65, 26 }, // 25, R, k40
+    { 69, 38 }, // 26, F, k42
+    { 76, 49 }, // 27, V, k44
+    { 79, 0 }, // 28, F5, k07
+    { 72, 15 }, // 29, 5, k46
+    { 79, 26 }, // 30, T, k41
+    { 83, 38 }, // 31, G, k43
+    { 90, 49 }, // 32, B, k45
+    { 92, 61 }, // 33, SPACE, k94
+    { 94, 0 }, // 34, F6, k63
+    { 87, 15 }, // 35, 6, k56
+    { 94, 26 }, // 36, Y, k51
+    { 98, 38 }, // 37, H, k53
+    { 105, 49 }, // 38, N, k55
+    { 108, 0 }, // 39, F7, k71
+    { 101, 15 }, // 40, 7, k57
+    { 108, 26 }, // 41, U, k50
+    { 112, 38 }, // 42, J, k52
+    { 119, 49 }, // 43, M, k54
+    { 123, 0 }, // 44, F8, k76
+    { 116, 15 }, // 45, 8, k67
+    { 123, 26 }, // 46, I, k60
+    { 126, 38 }, // 47, K, k62
+    { 134, 49 }, // 48, ,, k64
+    { 145, 61 }, // 49, Alt_R, k95
+    { 141, 0 }, // 50, F9, ka6
+    { 130, 15 }, // 51, 9, k77
+    { 137, 26 }, // 52, O, k70
+    { 141, 38 }, // 53, L, k72
+    { 148, 49 }, // 54, ., k74
+    { 159, 61 }, // 55, FN, k92
+    { 155, 0 }, // 56, F10, ka7
+    { 145, 15 }, // 57, 0, k87
+    { 152, 26 }, // 58, P, k80
+    { 155, 38 }, // 59, ;, k82
+    { 163, 49 }, // 60, ?, k85
+    { 170, 0 }, // 61, F11, ka3
+    { 159, 15 }, // 62, -, k86
+    { 166, 26 }, // 63, [, k81
+    { 170, 38 }, // 64, ", k83
+    { 173, 61 }, // 65, Ct_R, k04
+    { 184, 0 }, // 66, F12, ka5
+    { 0, 8 }, // 67, LED, l01
+    { 224, 8 }, // 68, LED, l11
+    { 202, 0 }, // 69, Prt, k97
+    { 0, 15 }, // 70, LED, l02
+    { 224, 15 }, // 71, LED, l12
+    { 224, 15 }, // 72, Del, k65
+    { 0, 21 }, // 73, LED, l03
+    { 224, 21 }, // 74, LED, l13
+    { 224, 26 }, // 75, PgUp, k15
+    { 0, 28 }, // 76, LED, l04
+    { 224, 28 }, // 77, LED, l14
+    { 173, 15 }, // 78, =, k66
+    { 220, 64 }, // 79, Right, k05
+    { 0, 35 }, // 80, LED, l05
+    { 224, 35 }, // 81, LED, l15
+    { 224, 49 }, // 82, End, k75
+    { 0, 42 }, // 83, LED, l06
+    { 224, 42 }, // 84, LED, l16
+    { 195, 15 }, // 85, BSpc, ka1
+    { 224, 38 }, // 86, PgDn, k25
+    { 0, 48 }, // 87, LED, l07
+    { 224, 48 }, // 88, LED, l17
+    { 181, 26 }, // 89, ], k61
+    { 182, 49 }, // 90, Sh_R, k91
+    { 0, 55 }, // 91, LED, l08
+    { 224, 55 }, // 92, LED, l18
+    { 199, 26 }, // 93, \, ka2
+    { 206, 52 }, // 94, Up, k35
+    { 191, 64 }, // 95, Left, k03
+    { 193, 38 }, // 96, Enter, ka4
+    { 206, 64 } // 97, Down, k73
+}, {
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 4, 2, 2, 4, 2, 2,
+    4, 2, 2, 4, 4, 2, 2, 4, 2, 2, 4, 4, 2, 2, 4, 4, 2, 2, 4, 4, 4, 4, 4
+} };
+
+const aw_led g_aw_leds[DRIVER_LED_TOTAL] = {
+    { 0, CS1_SW1, CS2_SW1, CS3_SW1 },  //  0, ESC, k13
+    { 0, CS4_SW1, CS5_SW1, CS6_SW1 },  //  1, ~, k16
+    { 0, CS7_SW1, CS8_SW1, CS9_SW1 },  //  2, Tab, k11
+    { 0, CS10_SW1, CS11_SW1, CS12_SW1 },  //  3, Caps, k21
+    { 0, CS13_SW1, CS14_SW1, CS15_SW1 },  //  4, Sh_L, k00
+    { 0, CS16_SW1, CS17_SW1, CS18_SW1 },  //  5, Ct_L, k06
+    { 0, CS1_SW2, CS2_SW2, CS3_SW2 },  //  6, F1, k26
+    { 0, CS4_SW2, CS5_SW2, CS6_SW2 },  //  7, 1, k17
+    { 0, CS7_SW2, CS8_SW2, CS9_SW2 },  //  8, Q, k10
+    { 0, CS10_SW2, CS11_SW2, CS12_SW2 },  //  9, A, k12
+    { 0, CS13_SW2, CS14_SW2, CS15_SW2 },  //  10, Z, k14
+    { 0, CS16_SW2, CS17_SW2, CS18_SW2 },  //  11, Win_L, k90
+    { 0, CS1_SW3, CS2_SW3, CS3_SW3 },  //  12, F2, k36
+    { 0, CS4_SW3, CS5_SW3, CS6_SW3 },  //  13, 2, k27
+    { 0, CS7_SW3, CS8_SW3, CS9_SW3 },  //  14, W, k20
+    { 0, CS10_SW3, CS11_SW3, CS12_SW3 },  //  15, S, k22
+    { 0, CS13_SW3, CS14_SW3, CS15_SW3 },  //  16, X, k24
+    { 0, CS16_SW3, CS17_SW3, CS18_SW3 },  //  17, Alt_L, k93
+    { 0, CS1_SW4, CS2_SW4, CS3_SW4 },  //  18, F3, k31
+    { 0, CS4_SW4, CS5_SW4, CS6_SW4 },  //  19, 3, k37
+    { 0, CS7_SW4, CS8_SW4, CS9_SW4 },  //  20, E, k30
+    { 0, CS10_SW4, CS11_SW4, CS12_SW4 },  //  21, D, k32
+    { 0, CS13_SW4, CS14_SW4, CS15_SW4 },  //  22, C, k34
+    { 0, CS1_SW5, CS2_SW5, CS3_SW5 },  //  23, F4, k33
+    { 0, CS4_SW5, CS5_SW5, CS6_SW5 },  //  24, 4, k47
+    { 0, CS7_SW5, CS8_SW5, CS9_SW5 },  //  25, R, k40
+    { 0, CS10_SW5, CS11_SW5, CS12_SW5 },  //  26, F, k42
+    { 0, CS13_SW5, CS14_SW5, CS15_SW5 },  //  27, V, k44
+    { 0, CS1_SW6, CS2_SW6, CS3_SW6 },  //  28, F5, k07
+    { 0, CS4_SW6, CS5_SW6, CS6_SW6 },  //  29, 5, k46
+    { 0, CS7_SW6, CS8_SW6, CS9_SW6 },  //  30, T, k41
+    { 0, CS10_SW6, CS11_SW6, CS12_SW6 },  //  31, G, k43
+    { 0, CS13_SW6, CS14_SW6, CS15_SW6 },  //  32, B, k45
+    { 0, CS16_SW6, CS17_SW6, CS18_SW6 },  //  33, SPACE, k94
+    { 0, CS1_SW7, CS2_SW7, CS3_SW7 },  //  34, F6, k63
+    { 0, CS4_SW7, CS5_SW7, CS6_SW7 },  //  35, 6, k56
+    { 0, CS7_SW7, CS8_SW7, CS9_SW7 },  //  36, Y, k51
+    { 0, CS10_SW7, CS11_SW7, CS12_SW7 },  //  37, H, k53
+    { 0, CS13_SW7, CS14_SW7, CS15_SW7 },  //  38, N, k55
+    { 0, CS1_SW8, CS2_SW8, CS3_SW8 },  //  39, F7, k71
+    { 0, CS4_SW8, CS5_SW8, CS6_SW8 },  //  40, 7, k57
+    { 0, CS7_SW8, CS8_SW8, CS9_SW8 },  //  41, U, k50
+    { 0, CS10_SW8, CS11_SW8, CS12_SW8 },  //  42, J, k52
+    { 0, CS13_SW8, CS14_SW8, CS15_SW8 },  //  43, M, k54
+    { 0, CS1_SW9, CS2_SW9, CS3_SW9 },  //  44, F8, k76
+    { 0, CS4_SW9, CS5_SW9, CS6_SW9 },  //  45, 8, k67
+    { 0, CS7_SW9, CS8_SW9, CS9_SW9 },  //  46, I, k60
+    { 0, CS10_SW9, CS11_SW9, CS12_SW9 },  //  47, K, k62
+    { 0, CS13_SW9, CS14_SW9, CS15_SW9 },  //  48, ,, k64
+    { 0, CS16_SW9, CS17_SW9, CS18_SW9 },  //  49, Alt_R, k95
+    { 0, CS1_SW10, CS2_SW10, CS3_SW10 },  //  50, F9, ka6
+    { 0, CS4_SW10, CS5_SW10, CS6_SW10 },  //  51, 9, k77
+    { 0, CS7_SW10, CS8_SW10, CS9_SW10 },  //  52, O, k70
+    { 0, CS10_SW10, CS11_SW10, CS12_SW10 },  //  53, L, k72
+    { 0, CS13_SW10, CS14_SW10, CS15_SW10 },  //  54, ., k74
+    { 0, CS16_SW10, CS17_SW10, CS18_SW10 },  //  55, FN, k92
+    { 0, CS1_SW11, CS2_SW11, CS3_SW11 },  //  56, F10, ka7
+    { 0, CS4_SW11, CS5_SW11, CS6_SW11 },  //  57, 0, k87
+    { 0, CS7_SW11, CS8_SW11, CS9_SW11 },  //  58, P, k80
+    { 0, CS10_SW11, CS11_SW11, CS12_SW11 },  //  59, ;, k82
+    { 0, CS13_SW11, CS14_SW11, CS15_SW11 },  //  60, ?, k85
+    { 0, CS1_SW12, CS2_SW12, CS3_SW12 },  //  61, F11, ka3
+    { 0, CS4_SW12, CS5_SW12, CS6_SW12 },  //  62, -, k86
+    { 0, CS7_SW12, CS8_SW12, CS9_SW12 },  //  63, [, k81
+    { 0, CS10_SW12, CS11_SW12, CS12_SW12 },  //  64, ", k83
+    { 0, CS16_SW12, CS17_SW12, CS18_SW12 },  //  65, Ct_R, k04
+
+    { 1, CS1_SW1, CS2_SW1, CS3_SW1 },  //  66, F12, ka5
+    { 1, CS13_SW1, CS14_SW1, CS15_SW1 },  //  67, LED, l01
+    { 1, CS16_SW1, CS17_SW1, CS18_SW1 },  //  68, LED, l11
+    { 1, CS4_SW2, CS5_SW2, CS6_SW2 },  //  69, Prt, k97
+    { 1, CS13_SW2, CS14_SW2, CS15_SW2 },  //  70, LED, l02
+    { 1, CS16_SW2, CS17_SW2, CS18_SW2 },  //  71, LED, l12
+    { 1, CS4_SW3, CS5_SW3, CS6_SW3 },  //  72, Del, k65
+    { 1, CS13_SW3, CS14_SW3, CS15_SW3 },  //  73, LED, l03
+    { 1, CS16_SW3, CS17_SW3, CS18_SW3 },  //  74, LED, l13
+    { 1, CS4_SW4, CS5_SW4, CS6_SW4 },  //  75, PgUp, k15
+    { 1, CS13_SW4, CS14_SW4, CS15_SW4 },  //  76, LED, l04
+    { 1, CS16_SW4, CS17_SW4, CS18_SW4 },  //  77, LED, l14
+    { 1, CS1_SW5, CS2_SW5, CS3_SW5 },  //  78, =, k66
+    { 1, CS10_SW5, CS11_SW5, CS12_SW5 },  //  79, Right, k05
+    { 1, CS13_SW5, CS14_SW5, CS15_SW5 },  //  80, LED, l05
+    { 1, CS16_SW5, CS17_SW5, CS18_SW5 },  //  81, LED, l15
+    { 1, CS4_SW6, CS5_SW6, CS6_SW6 },  //  82, End, k75
+    { 1, CS13_SW6, CS14_SW6, CS15_SW6 },  //  83, LED, l06
+    { 1, CS16_SW6, CS17_SW6, CS18_SW6 },  //  84, LED, l16
+    { 1, CS1_SW7, CS2_SW7, CS3_SW7 },  //  85, BSpc, ka1
+    { 1, CS4_SW7, CS5_SW7, CS6_SW7 },  //  86, PgDn, k25
+    { 1, CS13_SW7, CS14_SW7, CS15_SW7 },  //  87, LED, l07
+    { 1, CS16_SW7, CS17_SW7, CS18_SW7 },  //  88, LED, l17
+    { 1, CS1_SW8, CS2_SW8, CS3_SW8 },  //  89, ], k61
+    { 1, CS4_SW8, CS5_SW8, CS6_SW8 },  //  90, Sh_R, k91
+    { 1, CS13_SW8, CS14_SW8, CS15_SW8 },  //  91, LED, l08
+    { 1, CS16_SW8, CS17_SW8, CS18_SW8 },  //  92, LED, l18
+    { 1, CS1_SW9, CS2_SW9, CS3_SW9 },  //  93, \, ka2
+    { 1, CS4_SW9, CS5_SW9, CS6_SW9 },  //  94, Up, k35
+    { 1, CS4_SW10, CS5_SW10, CS6_SW10 },  //  95, Left, k03
+    { 1, CS1_SW11, CS2_SW11, CS3_SW11 },  //  96, Enter, ka4
+    { 1, CS4_SW11, CS5_SW11, CS6_SW11 },  //  97, Down, k73
+};
+#endif
diff --git a/keyboards/gmmk/pro/rules.mk b/keyboards/gmmk/pro/rules.mk
index b12d055a3..6221d6408 100644
--- a/keyboards/gmmk/pro/rules.mk
+++ b/keyboards/gmmk/pro/rules.mk
@@ -21,3 +21,5 @@ RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
 BLUETOOTH_ENABLE = no       # Enable Bluetooth
 AUDIO_ENABLE = no           # Audio output
 ENCODER_ENABLE = yes
+RGB_MATRIX_ENABLE = yes
+RGB_MATRIX_DRIVER = AW20216
diff --git a/keyboards/handwired/colorlice/config.h b/keyboards/handwired/colorlice/config.h
index 206a4004e..0148817f3 100644
--- a/keyboards/handwired/colorlice/config.h
+++ b/keyboards/handwired/colorlice/config.h
@@ -49,7 +49,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* RGB LEDs */
 #define RGB_DI_PIN B1
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #define RGB_MATRIX_LED_PROCESS_LIMIT 4
diff --git a/keyboards/handwired/dactyl_manuform/5x6_right_trackball/5x6_right_trackball.h b/keyboards/handwired/dactyl_manuform/5x6_right_trackball/5x6_right_trackball.h
index c8650f73d..ed408563f 100644
--- a/keyboards/handwired/dactyl_manuform/5x6_right_trackball/5x6_right_trackball.h
+++ b/keyboards/handwired/dactyl_manuform/5x6_right_trackball/5x6_right_trackball.h
@@ -19,7 +19,7 @@
 #include "dactyl_manuform.h"
 #include "quantum.h"
 #include "spi_master.h"
-#include "pmw3360.h"
+#include "drivers/sensors/pmw3360.h"
 #include "pointing_device.h"
 
 
diff --git a/keyboards/handwired/dactyl_manuform/5x6_right_trackball/rules.mk b/keyboards/handwired/dactyl_manuform/5x6_right_trackball/rules.mk
index 3fb9ab2a8..9f4a5ea02 100644
--- a/keyboards/handwired/dactyl_manuform/5x6_right_trackball/rules.mk
+++ b/keyboards/handwired/dactyl_manuform/5x6_right_trackball/rules.mk
@@ -27,5 +27,5 @@ MOUSE_SHARED_EP = no
 SPLIT_KEYBOARD = yes
 SPLIT_TRANSPORT = custom
 
-SRC += pmw3360.c
+SRC += drivers/sensors/pmw3360.c
 QUANTUM_LIB_SRC += pointer_transport.c serial.c i2c_master.c i2c_slave.c spi_master.c
diff --git a/keyboards/handwired/frankie_macropad/keymaps/default/config.h b/keyboards/handwired/frankie_macropad/keymaps/default/config.h
new file mode 100644
index 000000000..dd687cad5
--- /dev/null
+++ b/keyboards/handwired/frankie_macropad/keymaps/default/config.h
@@ -0,0 +1,19 @@
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#define LAYER_STATE_8BIT
diff --git a/keyboards/handwired/freoduo/rules.mk b/keyboards/handwired/freoduo/rules.mk
index e3da3753e..d8923557d 100644
--- a/keyboards/handwired/freoduo/rules.mk
+++ b/keyboards/handwired/freoduo/rules.mk
@@ -11,7 +11,7 @@ BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration
 MOUSEKEY_ENABLE = yes       # Mouse keys
 EXTRAKEY_ENABLE = yes       # Audio control and System control
 CONSOLE_ENABLE = no         # Console for debug
-COMMAND_ENABLE = yes        # Commands for debug and configuration
+COMMAND_ENABLE = no         # Commands for debug and configuration
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
 SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
 # if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
@@ -21,4 +21,4 @@ RGBLIGHT_ENABLE = yes       # Enable keyboard RGB underglow
 BLUETOOTH_ENABLE = no       # Enable Bluetooth
 AUDIO_ENABLE = no           # Audio output
 VELOCIKEY_ENABLE = yes
-SPLIT_KEYBOARD = yes
\ No newline at end of file
+SPLIT_KEYBOARD = yes
diff --git a/keyboards/handwired/hnah40rgb/config.h b/keyboards/handwired/hnah40rgb/config.h
index e6271738c..3d558f97f 100644
--- a/keyboards/handwired/hnah40rgb/config.h
+++ b/keyboards/handwired/hnah40rgb/config.h
@@ -60,7 +60,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
+// #define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 200 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
 #define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_PINWHEEL // Sets the default mode, if none has been set
diff --git a/keyboards/handwired/p65rgb/config.h b/keyboards/handwired/p65rgb/config.h
index c50fc2826..142d3c03e 100644
--- a/keyboards/handwired/p65rgb/config.h
+++ b/keyboards/handwired/p65rgb/config.h
@@ -40,7 +40,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define RGB_DI_PIN B4
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #define RGB_MATRIX_LED_PROCESS_LIMIT 4
diff --git a/keyboards/helix/rev2/keymaps/default/rules.mk b/keyboards/helix/rev2/keymaps/default/rules.mk
index 206e836ec..c16f3e2b8 100644
--- a/keyboards/helix/rev2/keymaps/default/rules.mk
+++ b/keyboards/helix/rev2/keymaps/default/rules.mk
@@ -5,7 +5,7 @@
 #   See TOP/keyboards/helix/rules.mk for a list of options that can be set.
 #   See TOP/docs/config_options.md for more information.
 #
-LTO_ENABLE = no  # if firmware size over limit, try this option
+LTO_ENABLE = yes  # if firmware size over limit, try this option
 
 # Helix Spacific Build Options
 # you can uncomment and edit follows 7 Variables
diff --git a/keyboards/helix/rev3_4rows/config.h b/keyboards/helix/rev3_4rows/config.h
index 9102104bf..95eb8bf0c 100644
--- a/keyboards/helix/rev3_4rows/config.h
+++ b/keyboards/helix/rev3_4rows/config.h
@@ -68,7 +68,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #   define RGB_MATRIX_KEYPRESSES // reacts to keypresses
 // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#   define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#   define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #   define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 // #   define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 // #   define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
diff --git a/keyboards/helix/rev3_5rows/config.h b/keyboards/helix/rev3_5rows/config.h
index 4dda76206..a373de7d1 100644
--- a/keyboards/helix/rev3_5rows/config.h
+++ b/keyboards/helix/rev3_5rows/config.h
@@ -68,7 +68,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #   define RGB_MATRIX_KEYPRESSES // reacts to keypresses
 // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#   define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#   define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #   define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 // #   define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 // #   define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
diff --git a/keyboards/hs60/v1/config.h b/keyboards/hs60/v1/config.h
index 68c75b2af..41246b6ee 100644
--- a/keyboards/hs60/v1/config.h
+++ b/keyboards/hs60/v1/config.h
@@ -118,7 +118,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //#define RGB_MATRIX_KEYPRESSES // reacts to keypresses (will slow down matrix scan by a lot)
 
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
+// #define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 215
 
 #define DRIVER_ADDR_1 0b1110100
diff --git a/keyboards/kbdfans/bella/rgb/config.h b/keyboards/kbdfans/bella/rgb/config.h
index f56049690..07594a34a 100644
--- a/keyboards/kbdfans/bella/rgb/config.h
+++ b/keyboards/kbdfans/bella/rgb/config.h
@@ -37,7 +37,7 @@
 /* disable these deprecated features by default */
 #ifdef RGB_MATRIX_ENABLE
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #define RGB_MATRIX_LED_PROCESS_LIMIT 4
diff --git a/keyboards/kbdfans/bella/rgb_iso/config.h b/keyboards/kbdfans/bella/rgb_iso/config.h
index fc7a9d7c0..4fda99867 100644
--- a/keyboards/kbdfans/bella/rgb_iso/config.h
+++ b/keyboards/kbdfans/bella/rgb_iso/config.h
@@ -37,7 +37,7 @@
 /* disable these deprecated features by default */
 #ifdef RGB_MATRIX_ENABLE
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #define RGB_MATRIX_LED_PROCESS_LIMIT 4
diff --git a/keyboards/kbdfans/kbd67/mkiirgb/v1/config.h b/keyboards/kbdfans/kbd67/mkiirgb/v1/config.h
index a832110d3..b0b7e1dad 100644
--- a/keyboards/kbdfans/kbd67/mkiirgb/v1/config.h
+++ b/keyboards/kbdfans/kbd67/mkiirgb/v1/config.h
@@ -16,9 +16,9 @@
 #define RGB_MATRIX_LED_FLUSH_LIMIT 26
 #define DEBOUNCE 3
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
-#define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN     
+#define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
 #define DISABLE_RGB_MATRIX_BAND_SAT
 #define DISABLE_RGB_MATRIX_BAND_PINWHEEL_SAT
 #define DISABLE_RGB_MATRIX_BAND_SPIRAL_SAT
diff --git a/keyboards/kbdfans/kbd67/mkiirgb/v2/config.h b/keyboards/kbdfans/kbd67/mkiirgb/v2/config.h
index 1ac9c770d..51e732f10 100644
--- a/keyboards/kbdfans/kbd67/mkiirgb/v2/config.h
+++ b/keyboards/kbdfans/kbd67/mkiirgb/v2/config.h
@@ -16,10 +16,10 @@
 #define RGB_MATRIX_LED_FLUSH_LIMIT 26
 #define DEBOUNCE 3
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_ALL
-#define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN     
+#define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
 #define DISABLE_RGB_MATRIX_BAND_SAT
 #define DISABLE_RGB_MATRIX_BAND_PINWHEEL_SAT
 #define DISABLE_RGB_MATRIX_BAND_SPIRAL_SAT
diff --git a/keyboards/kbdfans/kbd67/rev1/keymaps/default/config.h b/keyboards/kbdfans/kbd67/rev1/keymaps/default/config.h
index a3ed4f762..90fb10ebb 100644
--- a/keyboards/kbdfans/kbd67/rev1/keymaps/default/config.h
+++ b/keyboards/kbdfans/kbd67/rev1/keymaps/default/config.h
@@ -16,4 +16,4 @@
 
 #pragma once
 
-// place overrides here
+#define LAYER_STATE_8BIT
diff --git a/keyboards/kbdfans/kbdmini/config.h b/keyboards/kbdfans/kbdmini/config.h
index 5a36e983d..fc65f4341 100644
--- a/keyboards/kbdfans/kbdmini/config.h
+++ b/keyboards/kbdfans/kbdmini/config.h
@@ -35,7 +35,7 @@
 
 #ifdef RGB_MATRIX_ENABLE
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
diff --git a/keyboards/kbdfans/maja/config.h b/keyboards/kbdfans/maja/config.h
index d8553766b..3722c8381 100755
--- a/keyboards/kbdfans/maja/config.h
+++ b/keyboards/kbdfans/maja/config.h
@@ -18,9 +18,9 @@
 #define RGB_MATRIX_LED_FLUSH_LIMIT 26
 #define DEBOUNCE 3
 #define RGB_DISABLE_AFTER_TIMEOUT 0
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
 #define RGB_MATRIX_KEYPRESSES
-#define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN     
+#define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
 #define DISABLE_RGB_MATRIX_BAND_SAT
 #define DISABLE_RGB_MATRIX_BAND_PINWHEEL_SAT
 #define DISABLE_RGB_MATRIX_BAND_SPIRAL_SAT
diff --git a/keyboards/keebio/iris/rev2/rules.mk b/keyboards/keebio/iris/rev2/rules.mk
index 765fa7f07..197bad476 100644
--- a/keyboards/keebio/iris/rev2/rules.mk
+++ b/keyboards/keebio/iris/rev2/rules.mk
@@ -32,3 +32,5 @@ RGBLIGHT_ENABLE = yes       # Enable WS2812 RGB underlight.
 SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
 SPLIT_KEYBOARD = yes
+
+LTO_ENABLE = yes
\ No newline at end of file
diff --git a/keyboards/keebio/iris/rev3/rules.mk b/keyboards/keebio/iris/rev3/rules.mk
index ea92bc98f..b64eab5a4 100644
--- a/keyboards/keebio/iris/rev3/rules.mk
+++ b/keyboards/keebio/iris/rev3/rules.mk
@@ -33,3 +33,4 @@ SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
 SPLIT_KEYBOARD = yes
 ENCODER_ENABLE = yes
+LTO_ENABLE = yes
\ No newline at end of file
diff --git a/keyboards/keebio/iris/rev4/rules.mk b/keyboards/keebio/iris/rev4/rules.mk
index ea92bc98f..9bf5688da 100644
--- a/keyboards/keebio/iris/rev4/rules.mk
+++ b/keyboards/keebio/iris/rev4/rules.mk
@@ -33,3 +33,5 @@ SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
 SPLIT_KEYBOARD = yes
 ENCODER_ENABLE = yes
+
+LTO_ENABLE = yes
\ No newline at end of file
diff --git a/keyboards/keebio/quefrency/rules.mk b/keyboards/keebio/quefrency/rules.mk
index 2c5ad0c36..c674e1016 100644
--- a/keyboards/keebio/quefrency/rules.mk
+++ b/keyboards/keebio/quefrency/rules.mk
@@ -19,3 +19,4 @@ SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 SPLIT_KEYBOARD = yes
 
 DEFAULT_FOLDER = keebio/quefrency/rev1
+LTO_ENABLE = yes
diff --git a/keyboards/keebio/viterbi/rev2/rules.mk b/keyboards/keebio/viterbi/rev2/rules.mk
index f95e7ae6a..829d6a56e 100644
--- a/keyboards/keebio/viterbi/rev2/rules.mk
+++ b/keyboards/keebio/viterbi/rev2/rules.mk
@@ -1,3 +1,5 @@
 BACKLIGHT_ENABLE = yes
 
 LAYOUTS = ortho_5x14
+
+LTO_ENABLE = yes
\ No newline at end of file
diff --git a/keyboards/keebio/viterbi/rules.mk b/keyboards/keebio/viterbi/rules.mk
index 0b746d172..92576d33e 100644
--- a/keyboards/keebio/viterbi/rules.mk
+++ b/keyboards/keebio/viterbi/rules.mk
@@ -19,16 +19,16 @@ BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration
 MOUSEKEY_ENABLE = yes       # Mouse keys
 EXTRAKEY_ENABLE = yes       # Audio control and System control
 CONSOLE_ENABLE = no         # Console for debug
-COMMAND_ENABLE = yes        # Commands for debug and configuration
+COMMAND_ENABLE = no         # Commands for debug and configuration
 NKRO_ENABLE = no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
-BACKLIGHT_ENABLE = no      # Enable keyboard backlight functionality
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
 MIDI_ENABLE = no            # MIDI controls
 AUDIO_ENABLE = no           # Audio output on port C6
 UNICODE_ENABLE = no         # Unicode
 BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
-RGBLIGHT_ENABLE = no       # Enable WS2812 RGB underlight.
+RGBLIGHT_ENABLE = no        # Enable WS2812 RGB underlight.
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
-SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
 
 SPLIT_KEYBOARD = yes
 
diff --git a/keyboards/kinesis/kint36/config.h b/keyboards/kinesis/kint36/config.h
index be5752603..8b46b3fc1 100644
--- a/keyboards/kinesis/kint36/config.h
+++ b/keyboards/kinesis/kint36/config.h
@@ -64,3 +64,5 @@
 #define LED_CAPS_LOCK_PIN C7
 #define LED_SCROLL_LOCK_PIN A5
 #define LED_COMPOSE_PIN E26
+
+#define EEPROM_SIZE 4096
diff --git a/keyboards/latin17rgb/config.h b/keyboards/latin17rgb/config.h
index 013899f60..6a7ea8e78 100644
--- a/keyboards/latin17rgb/config.h
+++ b/keyboards/latin17rgb/config.h
@@ -1,18 +1,18 @@
  /* Copyright 2021 18438880
-  * 
-  * This program is free software: you can redistribute it and/or modify 
-  * it under the terms of the GNU General Public License as published by 
-  * the Free Software Foundation, either version 2 of the License, or 
-  * (at your option) any later version. 
-  * 
-  * This program is distributed in the hope that it will be useful, 
-  * but WITHOUT ANY WARRANTY; without even the implied warranty of 
-  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
-  * GNU General Public License for more details. 
-  * 
-  * You should have received a copy of the GNU General Public License 
-  * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
-  */ 
+  *
+  * This program is free software: you can redistribute it and/or modify
+  * it under the terms of the GNU General Public License as published by
+  * the Free Software Foundation, either version 2 of the License, or
+  * (at your option) any later version.
+  *
+  * This program is distributed in the hope that it will be useful,
+  * but WITHOUT ANY WARRANTY; without even the implied warranty of
+  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  * GNU General Public License for more details.
+  *
+  * You should have received a copy of the GNU General Public License
+  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  */
 
 #pragma once
 
@@ -56,7 +56,7 @@
 
 #ifdef RGB_MATRIX_ENABLE
 #    define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    define RGB_MATRIX_KEYPRESSES
 #    define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #    define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
@@ -100,5 +100,3 @@
 #define RGBLIGHT_VAL_STEP 5
 #define RGBLIGHT_SLEEP
 #endif
-
-
diff --git a/keyboards/latin60rgb/config.h b/keyboards/latin60rgb/config.h
index bbe502054..97b481291 100644
--- a/keyboards/latin60rgb/config.h
+++ b/keyboards/latin60rgb/config.h
@@ -1,18 +1,18 @@
  /* Copyright 2021 latincompass
-  * 
-  * This program is free software: you can redistribute it and/or modify 
-  * it under the terms of the GNU General Public License as published by 
-  * the Free Software Foundation, either version 2 of the License, or 
-  * (at your option) any later version. 
-  * 
-  * This program is distributed in the hope that it will be useful, 
-  * but WITHOUT ANY WARRANTY; without even the implied warranty of 
-  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
-  * GNU General Public License for more details. 
-  * 
-  * You should have received a copy of the GNU General Public License 
-  * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
-  */ 
+  *
+  * This program is free software: you can redistribute it and/or modify
+  * it under the terms of the GNU General Public License as published by
+  * the Free Software Foundation, either version 2 of the License, or
+  * (at your option) any later version.
+  *
+  * This program is distributed in the hope that it will be useful,
+  * but WITHOUT ANY WARRANTY; without even the implied warranty of
+  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  * GNU General Public License for more details.
+  *
+  * You should have received a copy of the GNU General Public License
+  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  */
 #pragma once
 
 /* USB Device descriptor parameter */
@@ -53,7 +53,7 @@
 
 #ifdef RGB_MATRIX_ENABLE
 #    define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    define RGB_MATRIX_KEYPRESSES
 #    define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #    define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
@@ -77,4 +77,3 @@
 #    define DRIVER_1_LED_TOTAL 60
 #    define DRIVER_LED_TOTAL DRIVER_1_LED_TOTAL
 #endif
-
diff --git a/keyboards/le_chiffre/config.h b/keyboards/le_chiffre/config.h
index e14b4665f..af4d1e49c 100644
--- a/keyboards/le_chiffre/config.h
+++ b/keyboards/le_chiffre/config.h
@@ -69,7 +69,7 @@
 
 #ifdef RGB_MATRIX_ENABLE
 #define RGB_MATRIX_KEYPRESSES // reacts to keypresses
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150 // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash.
 #define RGB_MATRIX_HUE_STEP 8
diff --git a/keyboards/marksard/rhymestone/rev1/config.h b/keyboards/marksard/rhymestone/rev1/config.h
index 9a1bf0a1d..983392511 100644
--- a/keyboards/marksard/rhymestone/rev1/config.h
+++ b/keyboards/marksard/rhymestone/rev1/config.h
@@ -93,7 +93,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
   #define RGB_MATRIX_KEYPRESSES  // reacts to keypresses
   // #define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
   // #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-  #define RGB_DISABLE_WHEN_USB_SUSPENDED true  // turn off effects when suspended
+  #define RGB_DISABLE_WHEN_USB_SUSPENDED  // turn off effects when suspended
   // #define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
   // #define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
   #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150  // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
diff --git a/keyboards/massdrop/alt/keymaps/pregame/config.h b/keyboards/massdrop/alt/keymaps/pregame/config.h
index acd041ce1..32dee56d3 100644
--- a/keyboards/massdrop/alt/keymaps/pregame/config.h
+++ b/keyboards/massdrop/alt/keymaps/pregame/config.h
@@ -89,7 +89,7 @@
 // #define RGBLIGHT_SAT_STEP 25                                                 // Units to step when in/decreasing saturation
 // #define RGBLIGHT_VAL_STEP 12                                                 // Units to step when in/decreasing value (brightness)
 // #define RGB_DISABLE_AFTER_TIMEOUT 0                                          // number of ticks to wait until disabling effects
-// #define RGB_DISABLE_WHEN_USB_SUSPENDED false                         // turn off effects when suspended
+// #define RGB_DISABLE_WHEN_USB_SUSPENDED                       // turn off effects when suspended
 // #define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 // #define RGB_MATRIX_LED_FLUSH_LIMIT 16                                        // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 #define RGBLIGHT_ANIMATIONS                                                     // Run RGB animations
@@ -103,7 +103,7 @@
 // #define RGBLIGHT_EFFECT_RGB_TEST                                             // Enable RGB test animation mode.
 // #define RGBLIGHT_EFFECT_SNAKE                                                // Enable snake animation mode.
 // #define RGBLIGHT_EFFECT_STATIC_GRADIENT                                      // Enable static gradient mode.
-        
+
 // #define RGBLIGHT_EFFECT_BREATHE_CENTER                       // If defined, used to calculate the curve for the breathing animation. Valid values are 1.0 to 2.7
 // #define RGBLIGHT_EFFECT_BREATHE_MAX 255                      // The maximum brightness for the breathing mode. Valid values are 1 to 255
 // #define RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL 1000              // How long to wait between light changes for the "Christmas" animation, in milliseconds
diff --git a/keyboards/massdrop/alt/keymaps/urbanvanilla/config.h b/keyboards/massdrop/alt/keymaps/urbanvanilla/config.h
index 0f2740013..f2a7e5038 100644
--- a/keyboards/massdrop/alt/keymaps/urbanvanilla/config.h
+++ b/keyboards/massdrop/alt/keymaps/urbanvanilla/config.h
@@ -24,4 +24,4 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGB_MATRIX_LED_PROCESS_LIMIT 15
 #define RGB_MATRIX_LED_FLUSH_LIMIT 10
 
-#define RGB_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
+// #define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
diff --git a/keyboards/massdrop/ctrl/keymaps/endgame/config.h b/keyboards/massdrop/ctrl/keymaps/endgame/config.h
index 0ef485591..ad738347a 100644
--- a/keyboards/massdrop/ctrl/keymaps/endgame/config.h
+++ b/keyboards/massdrop/ctrl/keymaps/endgame/config.h
@@ -49,7 +49,7 @@
 // #define RGBLIGHT_SAT_STEP 25        // Units to step when in/decreasing saturation
 // #define RGBLIGHT_VAL_STEP 12        // Units to step when in/decreasing value (brightness)
 // #define RGB_DISABLE_AFTER_TIMEOUT 0   // number of ticks to wait until disabling effects
-// #define RGB_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
+// #define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 // #define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 // #define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 // #define RGBLIGHT_ANIMATIONS             // Run RGB animations
diff --git a/keyboards/massdrop/ctrl/keymaps/matthewrobo/config.h b/keyboards/massdrop/ctrl/keymaps/matthewrobo/config.h
index 6e16c3a5f..89c129c58 100644
--- a/keyboards/massdrop/ctrl/keymaps/matthewrobo/config.h
+++ b/keyboards/massdrop/ctrl/keymaps/matthewrobo/config.h
@@ -67,7 +67,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 // #define RGBLIGHT_SAT_STEP 25        // Units to step when in/decreasing saturation
 // #define RGBLIGHT_VAL_STEP 12        // Units to step when in/decreasing value (brightness)
 // #define RGB_DISABLE_AFTER_TIMEOUT 0   // number of ticks to wait until disabling effects
-// #define RGB_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
+// #define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 // #define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 // #define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 // #define RGBLIGHT_ANIMATIONS             // Run RGB animations
diff --git a/keyboards/mechlovin/adelais/rgb_led/rev1/config.h b/keyboards/mechlovin/adelais/rgb_led/rev1/config.h
index 1ba7d27df..d75cbd3f2 100644
--- a/keyboards/mechlovin/adelais/rgb_led/rev1/config.h
+++ b/keyboards/mechlovin/adelais/rgb_led/rev1/config.h
@@ -13,7 +13,7 @@
 #define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
+// #define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 220 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
-#define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_PINWHEEL // Sets the default mode, if none has been set
\ No newline at end of file
+#define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_PINWHEEL // Sets the default mode, if none has been set
diff --git a/keyboards/mechlovin/adelais/rgb_led/rev2/config.h b/keyboards/mechlovin/adelais/rgb_led/rev2/config.h
index 38ffdd40a..c830edce2 100644
--- a/keyboards/mechlovin/adelais/rgb_led/rev2/config.h
+++ b/keyboards/mechlovin/adelais/rgb_led/rev2/config.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #define PRODUCT_ID   0xAEC2
-#define PRODUCT      Adelais En Ciel Rev2  
+#define PRODUCT      Adelais En Ciel Rev2
 
 #define MATRIX_ROW_PINS { B1, A0, C13, A1, A2}
 #define MATRIX_COL_PINS { A10, A9, A8, B15, B14, B13, B12, B11, B10, B8, B4, B5, B3, C14, A7 }
@@ -31,7 +31,7 @@
 #define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
+// #define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 255 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
 #define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_PINWHEEL // Sets the default mode, if none has been set
@@ -42,4 +42,4 @@
 #define ENCODERS_PAD_B { A3 }
 #define ENCODER_RESOLUTION 4
 
-#define TAP_CODE_DELAY 10
\ No newline at end of file
+#define TAP_CODE_DELAY 10
diff --git a/keyboards/mechlovin/delphine/rgb_led/config.h b/keyboards/mechlovin/delphine/rgb_led/config.h
index 4d5c853d0..9a653d759 100644
--- a/keyboards/mechlovin/delphine/rgb_led/config.h
+++ b/keyboards/mechlovin/delphine/rgb_led/config.h
@@ -24,7 +24,7 @@
 //     #define RGBLIGHT_EFFECT_RGB_TEST
 //     #define RGBLIGHT_EFFECT_ALTERNATING
 #endif
- 
+
 //rgb matrix setting// This is a 7-bit address, that gets left-shifted and bit 0
 // set to 0 for write, 1 for read (as per I2C protocol)
 // The address will vary depending on your wiring:
@@ -41,7 +41,7 @@
 #define RGB_MATRIX_KEYPRESSES // reacts to keypresses
 #define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
+// #define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 255 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
 #define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_PINWHEEL // Sets the default mode, if none has been set
diff --git a/keyboards/mechlovin/hannah60rgb/rev1/config.h b/keyboards/mechlovin/hannah60rgb/rev1/config.h
index 20873e716..fd45ecca6 100644
--- a/keyboards/mechlovin/hannah60rgb/rev1/config.h
+++ b/keyboards/mechlovin/hannah60rgb/rev1/config.h
@@ -11,8 +11,8 @@
 #    define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 #    define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #    define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
+// #    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 #    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 255 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
 #    define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_PINWHEEL // Sets the default mode, if none has been set
-#endif
\ No newline at end of file
+#endif
diff --git a/keyboards/mechlovin/hannah60rgb/rev2/config.h b/keyboards/mechlovin/hannah60rgb/rev2/config.h
index 2bcffbc85..5e57f985d 100644
--- a/keyboards/mechlovin/hannah60rgb/rev2/config.h
+++ b/keyboards/mechlovin/hannah60rgb/rev2/config.h
@@ -30,11 +30,11 @@
 #define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
+// #define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 255 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
 #define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_PINWHEEL // Sets the default mode, if none has been set
 
 #if defined(RGBLIGHT_ENABLE) && defined(RGB_MATRIX_ENABLE)
 #    define RGB_MATRIX_DISABLE_KEYCODES
-#endif
\ No newline at end of file
+#endif
diff --git a/keyboards/mechlovin/infinity87/rgb_rev1/config.h b/keyboards/mechlovin/infinity87/rgb_rev1/config.h
index 0c16c684c..76c6e0db7 100644
--- a/keyboards/mechlovin/infinity87/rgb_rev1/config.h
+++ b/keyboards/mechlovin/infinity87/rgb_rev1/config.h
@@ -35,7 +35,7 @@
 // 0b0110001 AD <-> SCL
 // 0b0110010 AD <-> SDA
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define DISABLE_RGB_MATRIX_SPLASH
 #define DISABLE_RGB_MATRIX_MULTISPLASH
diff --git a/keyboards/melgeek/mj61/config.h b/keyboards/melgeek/mj61/config.h
index 164c04fb5..6ba19dd75 100644
--- a/keyboards/melgeek/mj61/config.h
+++ b/keyboards/melgeek/mj61/config.h
@@ -37,7 +37,7 @@
 #define NO_ACTION_FUNCTION
 
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_LED_PROCESS_LIMIT 4
 #define RGB_MATRIX_LED_FLUSH_LIMIT 26
diff --git a/keyboards/melgeek/mj63/config.h b/keyboards/melgeek/mj63/config.h
index 47ad2f96c..46d3b0fb7 100644
--- a/keyboards/melgeek/mj63/config.h
+++ b/keyboards/melgeek/mj63/config.h
@@ -37,7 +37,7 @@
 #define NO_ACTION_FUNCTION
 
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_LED_PROCESS_LIMIT 4
 #define RGB_MATRIX_LED_FLUSH_LIMIT 26
diff --git a/keyboards/melgeek/mj64/config.h b/keyboards/melgeek/mj64/config.h
index 29cb95f17..920d34acd 100644
--- a/keyboards/melgeek/mj64/config.h
+++ b/keyboards/melgeek/mj64/config.h
@@ -37,7 +37,7 @@
 #define NO_ACTION_FUNCTION
 
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_LED_PROCESS_LIMIT 4
 #define RGB_MATRIX_LED_FLUSH_LIMIT 26
diff --git a/keyboards/melgeek/mj65/config.h b/keyboards/melgeek/mj65/config.h
index 12a7c7ce1..399c243ac 100644
--- a/keyboards/melgeek/mj65/config.h
+++ b/keyboards/melgeek/mj65/config.h
@@ -37,7 +37,7 @@
 #define NO_ACTION_FUNCTION
 
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_LED_PROCESS_LIMIT 4
 #define RGB_MATRIX_LED_FLUSH_LIMIT 26
diff --git a/keyboards/melgeek/mojo75/config.h b/keyboards/melgeek/mojo75/config.h
index c1a8083f1..d5bb4b454 100644
--- a/keyboards/melgeek/mojo75/config.h
+++ b/keyboards/melgeek/mojo75/config.h
@@ -37,7 +37,7 @@
 #define NO_ACTION_FUNCTION
 
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_LED_PROCESS_LIMIT 4
 #define RGB_MATRIX_LED_FLUSH_LIMIT 26
diff --git a/keyboards/melgeek/z70ultra/config.h b/keyboards/melgeek/z70ultra/config.h
index d5a9d0a89..e4530e2ea 100644
--- a/keyboards/melgeek/z70ultra/config.h
+++ b/keyboards/melgeek/z70ultra/config.h
@@ -36,7 +36,7 @@
 #define NO_ACTION_FUNCTION
 
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_LED_PROCESS_LIMIT 4
 #define RGB_MATRIX_LED_FLUSH_LIMIT 26
diff --git a/keyboards/miller/gm862/config.h b/keyboards/miller/gm862/config.h
index 2b084efc2..e6e1b4c1d 100644
--- a/keyboards/miller/gm862/config.h
+++ b/keyboards/miller/gm862/config.h
@@ -36,10 +36,10 @@
 #define DEBOUNCE 3
 #ifdef RGB_MATRIX_ENABLE
 #    define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    define RGB_MATRIX_KEYPRESSES
 #    define RGB_MATRIX_FRAMEBUFFER_EFFECTS
-#    define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN 
+#    define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
 #    define DISABLE_RGB_MATRIX_BAND_SAT
 #    define DISABLE_RGB_MATRIX_BAND_PINWHEEL_SAT
 #    define DISABLE_RGB_MATRIX_BAND_SPIRAL_SAT
diff --git a/keyboards/monstargear/xo87/rgb/config.h b/keyboards/monstargear/xo87/rgb/config.h
index 83eee8349..5ed0ed445 100644
--- a/keyboards/monstargear/xo87/rgb/config.h
+++ b/keyboards/monstargear/xo87/rgb/config.h
@@ -36,7 +36,7 @@
 #define DIODE_DIRECTION ROW2COL
 #define RGB_DI_PIN D7
 #define DRIVER_LED_TOTAL 110
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
 
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 100 // limits maximum brightness of LEDs to 100 out of 255.
 #define RGBLIGHT_LIMIT_VAL 100 // limits maximum brightness of LEDs to 100 out of 255.
diff --git a/keyboards/moonlander/config.h b/keyboards/moonlander/config.h
index c88feea3d..c1a139dc7 100644
--- a/keyboards/moonlander/config.h
+++ b/keyboards/moonlander/config.h
@@ -91,7 +91,7 @@
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 175
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 #define RGB_MATRIX_KEYPRESSES
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
 
 #define MUSIC_MAP
 
diff --git a/keyboards/mt84/keymaps/default/config.h b/keyboards/mt84/keymaps/default/config.h
new file mode 100644
index 000000000..dd687cad5
--- /dev/null
+++ b/keyboards/mt84/keymaps/default/config.h
@@ -0,0 +1,19 @@
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#define LAYER_STATE_8BIT
diff --git a/keyboards/naked48/keymaps/salicylic/config.h b/keyboards/naked48/keymaps/salicylic/config.h
index b6372db3b..71a43e208 100644
--- a/keyboards/naked48/keymaps/salicylic/config.h
+++ b/keyboards/naked48/keymaps/salicylic/config.h
@@ -31,7 +31,7 @@
 #    define RGB_MATRIX_KEYPRESSES  // reacts to keypresses
 // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true  // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED  // turn off effects when suspended
 // #   define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 // #   define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 // #   define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150  // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
@@ -41,4 +41,3 @@
 #    define RGB_MATRIX_VAL_STEP 5
 #    define RGB_MATRIX_SPD_STEP 10
 #endif
-
diff --git a/keyboards/oddball/optical_sensor/optical_sensor.h b/keyboards/oddball/optical_sensor/optical_sensor.h
index a152d02cf..00955209e 100644
--- a/keyboards/oddball/optical_sensor/optical_sensor.h
+++ b/keyboards/oddball/optical_sensor/optical_sensor.h
@@ -17,7 +17,7 @@
 /* common interface for opitcal sensors */
 
 #if defined ADNS_9800
-    #include "../adns/adns.h"
+    #include "drivers/sensors/adns9800.h"
     #define config_optical_sensor_t config_adns_t
     #define report_optical_sensor_t report_adns_t
     #define optical_sensor_init adns_init
diff --git a/keyboards/oddball/rules.mk b/keyboards/oddball/rules.mk
index e9e540c3c..8fc86b570 100644
--- a/keyboards/oddball/rules.mk
+++ b/keyboards/oddball/rules.mk
@@ -25,5 +25,5 @@ POINTING_DEVICE_ENABLE = yes
 DEFAULT_FOLDER = oddball/v1
 
 SRC += spi_master.c
-SRC += adns/adns.c
+SRC += drivers/sensors/adns9800.c
 SRC += pmw/pmw.c
diff --git a/keyboards/opendeck/32/rev1/config.h b/keyboards/opendeck/32/rev1/config.h
index 9f8ed7427..8b25ab256 100644
--- a/keyboards/opendeck/32/rev1/config.h
+++ b/keyboards/opendeck/32/rev1/config.h
@@ -38,7 +38,7 @@
 #define DRIVER_COUNT 1
 #define DRIVER_1_LED_TOTAL (4 * 8 * 3)
 #define DRIVER_LED_TOTAL (DRIVER_1_LED_TOTAL)
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
 #define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_SPIRAL
 #define RGB_MATRIX_DISABLE_KEYCODES
 
diff --git a/keyboards/percent/canoe_gen2/config.h b/keyboards/percent/canoe_gen2/config.h
index bac5ebb3f..6409371d4 100644
--- a/keyboards/percent/canoe_gen2/config.h
+++ b/keyboards/percent/canoe_gen2/config.h
@@ -64,4 +64,4 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGB_MATRIX_STARTUP_SAT 255
 #define RGB_MATRIX_STARTUP_VAL RGB_MATRIX_MAXIMUM_BRIGHTNESS
 #define RGB_MATRIX_STARTUP_SPD 127
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
diff --git a/keyboards/phase_studio/titan65/config.h b/keyboards/phase_studio/titan65/config.h
index 4104c2ec2..66ae4f20b 100644
--- a/keyboards/phase_studio/titan65/config.h
+++ b/keyboards/phase_studio/titan65/config.h
@@ -47,5 +47,5 @@
 #define RGB_DI_PIN E6
 #define DRIVER_LED_TOTAL 67
 #define RGB_MATRIX_KEYPRESSES // reacts to keypresses
-#define RGB_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
+// #define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
diff --git a/keyboards/planck/ez/config.h b/keyboards/planck/ez/config.h
index 7f8876496..5317a5156 100644
--- a/keyboards/planck/ez/config.h
+++ b/keyboards/planck/ez/config.h
@@ -147,7 +147,7 @@
 
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
 
 #define RGB_MATRIX_LED_PROCESS_LIMIT 5
 #define RGB_MATRIX_LED_FLUSH_LIMIT 26
diff --git a/keyboards/planck/rev6/config.h b/keyboards/planck/rev6/config.h
index 4bc8a509f..18bb74096 100644
--- a/keyboards/planck/rev6/config.h
+++ b/keyboards/planck/rev6/config.h
@@ -141,7 +141,7 @@
 #define WS2812_DMA_CHANNEL 2
 
 #ifndef RGB_DISABLE_WHEN_USB_SUSPENDED
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED
 #endif
 
 #endif
diff --git a/keyboards/ploopyco/mouse/mouse.h b/keyboards/ploopyco/mouse/mouse.h
index 5d49d2f2d..d11aa5e9a 100644
--- a/keyboards/ploopyco/mouse/mouse.h
+++ b/keyboards/ploopyco/mouse/mouse.h
@@ -20,7 +20,7 @@
 
 #include "quantum.h"
 #include "spi_master.h"
-#include "pmw3360.h"
+#include "drivers/sensors/pmw3360.h"
 #include "analog.h"
 #include "opt_encoder.h"
 #include "pointing_device.h"
diff --git a/keyboards/ploopyco/mouse/rules.mk b/keyboards/ploopyco/mouse/rules.mk
index f998672f1..17aac9801 100644
--- a/keyboards/ploopyco/mouse/rules.mk
+++ b/keyboards/ploopyco/mouse/rules.mk
@@ -27,4 +27,4 @@ POINTING_DEVICE_ENABLE = yes
 MOUSEKEY_ENABLE = yes       # Mouse keys
 
 QUANTUM_LIB_SRC += analog.c spi_master.c
-SRC += pmw3360.c opt_encoder.c
+SRC += drivers/sensors/pmw3360.c opt_encoder.c
diff --git a/keyboards/ploopyco/pmw3360.c b/keyboards/ploopyco/pmw3360.c
deleted file mode 100644
index 5f9f72a9e..000000000
--- a/keyboards/ploopyco/pmw3360.c
+++ /dev/null
@@ -1,218 +0,0 @@
-/* Copyright 2020 Christopher Courtney, aka Drashna Jael're  (@drashna) <drashna@live.com>
- * Copyright 2019 Sunjun Kim
- * Copyright 2020 Ploopy Corporation
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "wait.h"
-#include "debug.h"
-#include "print.h"
-#include "pmw3360.h"
-#include "pmw3360_firmware.h"
-
-bool _inBurst = false;
-
-#ifndef PMW_CPI
-#    define PMW_CPI 1600
-#endif
-#ifndef SPI_DIVISOR
-#    define SPI_DIVISOR 2
-#endif
-#ifndef ROTATIONAL_TRANSFORM_ANGLE
-#    define ROTATIONAL_TRANSFORM_ANGLE 0x00
-#endif
-
-void print_byte(uint8_t byte) { dprintf("%c%c%c%c%c%c%c%c|", (byte & 0x80 ? '1' : '0'), (byte & 0x40 ? '1' : '0'), (byte & 0x20 ? '1' : '0'), (byte & 0x10 ? '1' : '0'), (byte & 0x08 ? '1' : '0'), (byte & 0x04 ? '1' : '0'), (byte & 0x02 ? '1' : '0'), (byte & 0x01 ? '1' : '0')); }
-
-
-bool spi_start_adv(void) {
-    bool status = spi_start(SPI_SS_PIN, false, 3, SPI_DIVISOR);
-    wait_us(1);
-    return status;
-}
-
-void spi_stop_adv(void) {
-    wait_us(1);
-    spi_stop();
-}
-
-spi_status_t spi_write_adv(uint8_t reg_addr, uint8_t data) {
-    if (reg_addr != REG_Motion_Burst) {
-        _inBurst = false;
-    }
-
-    spi_start_adv();
-    // send address of the register, with MSBit = 1 to indicate it's a write
-    spi_status_t status = spi_write(reg_addr | 0x80);
-    status = spi_write(data);
-
-    // tSCLK-NCS for write operation
-    wait_us(20);
-
-    // tSWW/tSWR (=120us) minus tSCLK-NCS. Could be shortened, but is looks like a safe lower bound
-    wait_us(100);
-    spi_stop();
-    return status;
-}
-
-uint8_t spi_read_adv(uint8_t reg_addr) {
-    spi_start_adv();
-    // send adress of the register, with MSBit = 0 to indicate it's a read
-    spi_write(reg_addr & 0x7f);
-
-    uint8_t data = spi_read();
-
-    // tSCLK-NCS for read operation is 120ns
-    wait_us(1);
-
-    //  tSRW/tSRR (=20us) minus tSCLK-NCS
-    wait_us(19);
-
-    spi_stop();
-    return data;
-}
-
-void pmw_set_cpi(uint16_t cpi) {
-    int cpival = constrain((cpi / 100) - 1, 0, 0x77);  // limits to 0--119
-
-    spi_start_adv();
-    spi_write_adv(REG_Config1, cpival);
-    spi_stop();
-}
-
-bool pmw_spi_init(void) {
-    spi_init();
-    _inBurst = false;
-
-    spi_stop();
-    spi_start_adv();
-    spi_stop();
-
-    spi_write_adv(REG_Shutdown, 0xb6); // Shutdown first
-    wait_ms(300);
-
-    spi_start_adv();
-    wait_us(40);
-    spi_stop_adv();
-    wait_us(40);
-
-    spi_write_adv(REG_Power_Up_Reset, 0x5a);
-    wait_ms(50);
-
-    spi_read_adv(REG_Motion);
-    spi_read_adv(REG_Delta_X_L);
-    spi_read_adv(REG_Delta_X_H);
-    spi_read_adv(REG_Delta_Y_L);
-    spi_read_adv(REG_Delta_Y_H);
-
-    pmw_upload_firmware();
-
-    spi_stop_adv();
-
-    wait_ms(10);
-    pmw_set_cpi(PMW_CPI);
-
-    wait_ms(1);
-
-    return pmw_check_signature();
-}
-
-void pmw_upload_firmware(void) {
-    spi_write_adv(REG_Config2, 0x00);
-
-    spi_write_adv(REG_Angle_Tune, constrain(ROTATIONAL_TRANSFORM_ANGLE, -30, 30));
-
-    spi_write_adv(REG_SROM_Enable, 0x1d);
-
-    wait_ms(10);
-
-    spi_write_adv(REG_SROM_Enable, 0x18);
-
-    spi_start_adv();
-    spi_write(REG_SROM_Load_Burst | 0x80);
-    wait_us(15);
-
-    unsigned char c;
-    for (int i = 0; i < firmware_length; i++) {
-        c = (unsigned char)pgm_read_byte(firmware_data + i);
-        spi_write(c);
-        wait_us(15);
-    }
-    wait_us(200);
-
-    spi_read_adv(REG_SROM_ID);
-
-    spi_write_adv(REG_Config2, 0x00);
-
-    spi_stop();
-    wait_ms(10);
-}
-
-bool pmw_check_signature(void) {
-    uint8_t pid      = spi_read_adv(REG_Product_ID);
-    uint8_t iv_pid   = spi_read_adv(REG_Inverse_Product_ID);
-    uint8_t SROM_ver = spi_read_adv(REG_SROM_ID);
-    return (pid == 0x42 && iv_pid == 0xBD && SROM_ver == 0x04);  // signature for SROM 0x04
-}
-
-report_pmw_t pmw_read_burst(void) {
-    if (!_inBurst) {
-        dprintf("burst on");
-        spi_write_adv(REG_Motion_Burst, 0x00);
-        _inBurst = true;
-    }
-
-    spi_start_adv();
-    spi_write(REG_Motion_Burst);
-    wait_us(35);  // waits for tSRAD
-
-    report_pmw_t data;
-    data.motion = 0;
-    data.dx     = 0;
-    data.mdx    = 0;
-    data.dy     = 0;
-    data.mdx    = 0;
-
-    data.motion = spi_read();
-    spi_write(0x00);  // skip Observation
-    data.dx  = spi_read();
-    data.mdx = spi_read();
-    data.dy  = spi_read();
-    data.mdy = spi_read();
-
-    spi_stop();
-
-    print_byte(data.motion);
-    print_byte(data.dx);
-    print_byte(data.mdx);
-    print_byte(data.dy);
-    print_byte(data.mdy);
-    dprintf("\n");
-
-    data.isMotion    = (data.motion & 0x80) != 0;
-    data.isOnSurface = (data.motion & 0x08) == 0;
-    data.dx |= (data.mdx << 8);
-    data.dx = data.dx * -1;
-    data.dy |= (data.mdy << 8);
-    data.dy = data.dy * -1;
-
-    spi_stop();
-
-    if (data.motion & 0b111) {  // panic recovery, sometimes burst mode works weird.
-        _inBurst = false;
-    }
-
-    return data;
-}
diff --git a/keyboards/ploopyco/pmw3360.h b/keyboards/ploopyco/pmw3360.h
deleted file mode 100644
index c1d5e3bad..000000000
--- a/keyboards/ploopyco/pmw3360.h
+++ /dev/null
@@ -1,103 +0,0 @@
-/* Copyright 2020 Christopher Courtney, aka Drashna Jael're  (@drashna) <drashna@live.com>
- * Copyright 2019 Sunjun Kim
- * Copyright 2020 Ploopy Corporation
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include "spi_master.h"
-
-// Registers
-#define REG_Product_ID  0x00
-#define REG_Revision_ID 0x01
-#define REG_Motion  0x02
-#define REG_Delta_X_L 0x03
-#define REG_Delta_X_H 0x04
-#define REG_Delta_Y_L 0x05
-#define REG_Delta_Y_H 0x06
-#define REG_SQUAL 0x07
-#define REG_Raw_Data_Sum  0x08
-#define REG_Maximum_Raw_data  0x09
-#define REG_Minimum_Raw_data  0x0A
-#define REG_Shutter_Lower 0x0B
-#define REG_Shutter_Upper 0x0C
-#define REG_Control 0x0D
-#define REG_Config1 0x0F
-#define REG_Config2 0x10
-#define REG_Angle_Tune  0x11
-#define REG_Frame_Capture 0x12
-#define REG_SROM_Enable 0x13
-#define REG_Run_Downshift 0x14
-#define REG_Rest1_Rate_Lower  0x15
-#define REG_Rest1_Rate_Upper  0x16
-#define REG_Rest1_Downshift 0x17
-#define REG_Rest2_Rate_Lower  0x18
-#define REG_Rest2_Rate_Upper  0x19
-#define REG_Rest2_Downshift 0x1A
-#define REG_Rest3_Rate_Lower  0x1B
-#define REG_Rest3_Rate_Upper  0x1C
-#define REG_Observation 0x24
-#define REG_Data_Out_Lower  0x25
-#define REG_Data_Out_Upper  0x26
-#define REG_Raw_Data_Dump 0x29
-#define REG_SROM_ID 0x2A
-#define REG_Min_SQ_Run  0x2B
-#define REG_Raw_Data_Threshold  0x2C
-#define REG_Config5 0x2F
-#define REG_Power_Up_Reset  0x3A
-#define REG_Shutdown  0x3B
-#define REG_Inverse_Product_ID  0x3F
-#define REG_LiftCutoff_Tune3  0x41
-#define REG_Angle_Snap  0x42
-#define REG_LiftCutoff_Tune1  0x4A
-#define REG_Motion_Burst  0x50
-#define REG_LiftCutoff_Tune_Timeout 0x58
-#define REG_LiftCutoff_Tune_Min_Length  0x5A
-#define REG_SROM_Load_Burst 0x62
-#define REG_Lift_Config 0x63
-#define REG_Raw_Data_Burst  0x64
-#define REG_LiftCutoff_Tune2  0x65
-
-#ifdef CONSOLE_ENABLE
-void print_byte(uint8_t byte);
-#endif
-
-typedef struct {
-    int8_t  motion;
-    bool    isMotion;     // True if a motion is detected.
-    bool    isOnSurface;  // True when a chip is on a surface
-    int16_t dx;           // displacement on x directions. Unit: Count. (CPI * Count = Inch value)
-    int8_t  mdx;
-    int16_t dy;  // displacement on y directions.
-    int8_t  mdy;
-} report_pmw_t;
-
-
-
-bool spi_start_adv(void);
-void spi_stop_adv(void);
-spi_status_t spi_write_adv(uint8_t reg_addr, uint8_t data);
-uint8_t spi_read_adv(uint8_t reg_addr);
-bool pmw_spi_init(void);
-void pmw_set_cpi(uint16_t cpi);
-void pmw_upload_firmware(void);
-bool pmw_check_signature(void);
-report_pmw_t pmw_read_burst(void);
-
-
-#define degToRad(angleInDegrees) ((angleInDegrees)*M_PI / 180.0)
-#define radToDeg(angleInRadians) ((angleInRadians)*180.0 / M_PI)
-#define constrain(amt, low, high) ((amt) < (low) ? (low) : ((amt) > (high) ? (high) : (amt)))
diff --git a/keyboards/ploopyco/pmw3360_firmware.h b/keyboards/ploopyco/pmw3360_firmware.h
deleted file mode 100644
index cca5a6a4d..000000000
--- a/keyboards/ploopyco/pmw3360_firmware.h
+++ /dev/null
@@ -1,300 +0,0 @@
-/* Copyright 2020 Christopher Courtney, aka Drashna Jael're  (@drashna) <drashna@live.com>
- * Copyright 2019 Sunjun Kim
- * Copyright 2020 Ploopy Corporation
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-// clang-format off
-// Firmware Blob foor PMW3360
-const uint16_t firmware_length = 4094;
-// clang-format off
-const uint8_t firmware_data[] PROGMEM = {    // SROM 0x04
-0x01, 0x04, 0x8e, 0x96, 0x6e, 0x77, 0x3e, 0xfe, 0x7e, 0x5f, 0x1d, 0xb8, 0xf2, 0x66, 0x4e,
-0xff, 0x5d, 0x19, 0xb0, 0xc2, 0x04, 0x69, 0x54, 0x2a, 0xd6, 0x2e, 0xbf, 0xdd, 0x19, 0xb0,
-0xc3, 0xe5, 0x29, 0xb1, 0xe0, 0x23, 0xa5, 0xa9, 0xb1, 0xc1, 0x00, 0x82, 0x67, 0x4c, 0x1a,
-0x97, 0x8d, 0x79, 0x51, 0x20, 0xc7, 0x06, 0x8e, 0x7c, 0x7c, 0x7a, 0x76, 0x4f, 0xfd, 0x59,
-0x30, 0xe2, 0x46, 0x0e, 0x9e, 0xbe, 0xdf, 0x1d, 0x99, 0x91, 0xa0, 0xa5, 0xa1, 0xa9, 0xd0,
-0x22, 0xc6, 0xef, 0x5c, 0x1b, 0x95, 0x89, 0x90, 0xa2, 0xa7, 0xcc, 0xfb, 0x55, 0x28, 0xb3,
-0xe4, 0x4a, 0xf7, 0x6c, 0x3b, 0xf4, 0x6a, 0x56, 0x2e, 0xde, 0x1f, 0x9d, 0xb8, 0xd3, 0x05,
-0x88, 0x92, 0xa6, 0xce, 0x1e, 0xbe, 0xdf, 0x1d, 0x99, 0xb0, 0xe2, 0x46, 0xef, 0x5c, 0x07,
-0x11, 0x5d, 0x98, 0x0b, 0x9d, 0x94, 0x97, 0xee, 0x4e, 0x45, 0x33, 0x6b, 0x44, 0xc7, 0x29,
-0x56, 0x27, 0x30, 0xc6, 0xa7, 0xd5, 0xf2, 0x56, 0xdf, 0xb4, 0x38, 0x62, 0xcb, 0xa0, 0xb6,
-0xe3, 0x0f, 0x84, 0x06, 0x24, 0x05, 0x65, 0x6f, 0x76, 0x89, 0xb5, 0x77, 0x41, 0x27, 0x82,
-0x66, 0x65, 0x82, 0xcc, 0xd5, 0xe6, 0x20, 0xd5, 0x27, 0x17, 0xc5, 0xf8, 0x03, 0x23, 0x7c,
-0x5f, 0x64, 0xa5, 0x1d, 0xc1, 0xd6, 0x36, 0xcb, 0x4c, 0xd4, 0xdb, 0x66, 0xd7, 0x8b, 0xb1,
-0x99, 0x7e, 0x6f, 0x4c, 0x36, 0x40, 0x06, 0xd6, 0xeb, 0xd7, 0xa2, 0xe4, 0xf4, 0x95, 0x51,
-0x5a, 0x54, 0x96, 0xd5, 0x53, 0x44, 0xd7, 0x8c, 0xe0, 0xb9, 0x40, 0x68, 0xd2, 0x18, 0xe9,
-0xdd, 0x9a, 0x23, 0x92, 0x48, 0xee, 0x7f, 0x43, 0xaf, 0xea, 0x77, 0x38, 0x84, 0x8c, 0x0a,
-0x72, 0xaf, 0x69, 0xf8, 0xdd, 0xf1, 0x24, 0x83, 0xa3, 0xf8, 0x4a, 0xbf, 0xf5, 0x94, 0x13,
-0xdb, 0xbb, 0xd8, 0xb4, 0xb3, 0xa0, 0xfb, 0x45, 0x50, 0x60, 0x30, 0x59, 0x12, 0x31, 0x71,
-0xa2, 0xd3, 0x13, 0xe7, 0xfa, 0xe7, 0xce, 0x0f, 0x63, 0x15, 0x0b, 0x6b, 0x94, 0xbb, 0x37,
-0x83, 0x26, 0x05, 0x9d, 0xfb, 0x46, 0x92, 0xfc, 0x0a, 0x15, 0xd1, 0x0d, 0x73, 0x92, 0xd6,
-0x8c, 0x1b, 0x8c, 0xb8, 0x55, 0x8a, 0xce, 0xbd, 0xfe, 0x8e, 0xfc, 0xed, 0x09, 0x12, 0x83,
-0x91, 0x82, 0x51, 0x31, 0x23, 0xfb, 0xb4, 0x0c, 0x76, 0xad, 0x7c, 0xd9, 0xb4, 0x4b, 0xb2,
-0x67, 0x14, 0x09, 0x9c, 0x7f, 0x0c, 0x18, 0xba, 0x3b, 0xd6, 0x8e, 0x14, 0x2a, 0xe4, 0x1b,
-0x52, 0x9f, 0x2b, 0x7d, 0xe1, 0xfb, 0x6a, 0x33, 0x02, 0xfa, 0xac, 0x5a, 0xf2, 0x3e, 0x88,
-0x7e, 0xae, 0xd1, 0xf3, 0x78, 0xe8, 0x05, 0xd1, 0xe3, 0xdc, 0x21, 0xf6, 0xe1, 0x9a, 0xbd,
-0x17, 0x0e, 0xd9, 0x46, 0x9b, 0x88, 0x03, 0xea, 0xf6, 0x66, 0xbe, 0x0e, 0x1b, 0x50, 0x49,
-0x96, 0x40, 0x97, 0xf1, 0xf1, 0xe4, 0x80, 0xa6, 0x6e, 0xe8, 0x77, 0x34, 0xbf, 0x29, 0x40,
-0x44, 0xc2, 0xff, 0x4e, 0x98, 0xd3, 0x9c, 0xa3, 0x32, 0x2b, 0x76, 0x51, 0x04, 0x09, 0xe7,
-0xa9, 0xd1, 0xa6, 0x32, 0xb1, 0x23, 0x53, 0xe2, 0x47, 0xab, 0xd6, 0xf5, 0x69, 0x5c, 0x3e,
-0x5f, 0xfa, 0xae, 0x45, 0x20, 0xe5, 0xd2, 0x44, 0xff, 0x39, 0x32, 0x6d, 0xfd, 0x27, 0x57,
-0x5c, 0xfd, 0xf0, 0xde, 0xc1, 0xb5, 0x99, 0xe5, 0xf5, 0x1c, 0x77, 0x01, 0x75, 0xc5, 0x6d,
-0x58, 0x92, 0xf2, 0xb2, 0x47, 0x00, 0x01, 0x26, 0x96, 0x7a, 0x30, 0xff, 0xb7, 0xf0, 0xef,
-0x77, 0xc1, 0x8a, 0x5d, 0xdc, 0xc0, 0xd1, 0x29, 0x30, 0x1e, 0x77, 0x38, 0x7a, 0x94, 0xf1,
-0xb8, 0x7a, 0x7e, 0xef, 0xa4, 0xd1, 0xac, 0x31, 0x4a, 0xf2, 0x5d, 0x64, 0x3d, 0xb2, 0xe2,
-0xf0, 0x08, 0x99, 0xfc, 0x70, 0xee, 0x24, 0xa7, 0x7e, 0xee, 0x1e, 0x20, 0x69, 0x7d, 0x44,
-0xbf, 0x87, 0x42, 0xdf, 0x88, 0x3b, 0x0c, 0xda, 0x42, 0xc9, 0x04, 0xf9, 0x45, 0x50, 0xfc,
-0x83, 0x8f, 0x11, 0x6a, 0x72, 0xbc, 0x99, 0x95, 0xf0, 0xac, 0x3d, 0xa7, 0x3b, 0xcd, 0x1c,
-0xe2, 0x88, 0x79, 0x37, 0x11, 0x5f, 0x39, 0x89, 0x95, 0x0a, 0x16, 0x84, 0x7a, 0xf6, 0x8a,
-0xa4, 0x28, 0xe4, 0xed, 0x83, 0x80, 0x3b, 0xb1, 0x23, 0xa5, 0x03, 0x10, 0xf4, 0x66, 0xea,
-0xbb, 0x0c, 0x0f, 0xc5, 0xec, 0x6c, 0x69, 0xc5, 0xd3, 0x24, 0xab, 0xd4, 0x2a, 0xb7, 0x99,
-0x88, 0x76, 0x08, 0xa0, 0xa8, 0x95, 0x7c, 0xd8, 0x38, 0x6d, 0xcd, 0x59, 0x02, 0x51, 0x4b,
-0xf1, 0xb5, 0x2b, 0x50, 0xe3, 0xb6, 0xbd, 0xd0, 0x72, 0xcf, 0x9e, 0xfd, 0x6e, 0xbb, 0x44,
-0xc8, 0x24, 0x8a, 0x77, 0x18, 0x8a, 0x13, 0x06, 0xef, 0x97, 0x7d, 0xfa, 0x81, 0xf0, 0x31,
-0xe6, 0xfa, 0x77, 0xed, 0x31, 0x06, 0x31, 0x5b, 0x54, 0x8a, 0x9f, 0x30, 0x68, 0xdb, 0xe2,
-0x40, 0xf8, 0x4e, 0x73, 0xfa, 0xab, 0x74, 0x8b, 0x10, 0x58, 0x13, 0xdc, 0xd2, 0xe6, 0x78,
-0xd1, 0x32, 0x2e, 0x8a, 0x9f, 0x2c, 0x58, 0x06, 0x48, 0x27, 0xc5, 0xa9, 0x5e, 0x81, 0x47,
-0x89, 0x46, 0x21, 0x91, 0x03, 0x70, 0xa4, 0x3e, 0x88, 0x9c, 0xda, 0x33, 0x0a, 0xce, 0xbc,
-0x8b, 0x8e, 0xcf, 0x9f, 0xd3, 0x71, 0x80, 0x43, 0xcf, 0x6b, 0xa9, 0x51, 0x83, 0x76, 0x30,
-0x82, 0xc5, 0x6a, 0x85, 0x39, 0x11, 0x50, 0x1a, 0x82, 0xdc, 0x1e, 0x1c, 0xd5, 0x7d, 0xa9,
-0x71, 0x99, 0x33, 0x47, 0x19, 0x97, 0xb3, 0x5a, 0xb1, 0xdf, 0xed, 0xa4, 0xf2, 0xe6, 0x26,
-0x84, 0xa2, 0x28, 0x9a, 0x9e, 0xdf, 0xa6, 0x6a, 0xf4, 0xd6, 0xfc, 0x2e, 0x5b, 0x9d, 0x1a,
-0x2a, 0x27, 0x68, 0xfb, 0xc1, 0x83, 0x21, 0x4b, 0x90, 0xe0, 0x36, 0xdd, 0x5b, 0x31, 0x42,
-0x55, 0xa0, 0x13, 0xf7, 0xd0, 0x89, 0x53, 0x71, 0x99, 0x57, 0x09, 0x29, 0xc5, 0xf3, 0x21,
-0xf8, 0x37, 0x2f, 0x40, 0xf3, 0xd4, 0xaf, 0x16, 0x08, 0x36, 0x02, 0xfc, 0x77, 0xc5, 0x8b,
-0x04, 0x90, 0x56, 0xb9, 0xc9, 0x67, 0x9a, 0x99, 0xe8, 0x00, 0xd3, 0x86, 0xff, 0x97, 0x2d,
-0x08, 0xe9, 0xb7, 0xb3, 0x91, 0xbc, 0xdf, 0x45, 0xc6, 0xed, 0x0f, 0x8c, 0x4c, 0x1e, 0xe6,
-0x5b, 0x6e, 0x38, 0x30, 0xe4, 0xaa, 0xe3, 0x95, 0xde, 0xb9, 0xe4, 0x9a, 0xf5, 0xb2, 0x55,
-0x9a, 0x87, 0x9b, 0xf6, 0x6a, 0xb2, 0xf2, 0x77, 0x9a, 0x31, 0xf4, 0x7a, 0x31, 0xd1, 0x1d,
-0x04, 0xc0, 0x7c, 0x32, 0xa2, 0x9e, 0x9a, 0xf5, 0x62, 0xf8, 0x27, 0x8d, 0xbf, 0x51, 0xff,
-0xd3, 0xdf, 0x64, 0x37, 0x3f, 0x2a, 0x6f, 0x76, 0x3a, 0x7d, 0x77, 0x06, 0x9e, 0x77, 0x7f,
-0x5e, 0xeb, 0x32, 0x51, 0xf9, 0x16, 0x66, 0x9a, 0x09, 0xf3, 0xb0, 0x08, 0xa4, 0x70, 0x96,
-0x46, 0x30, 0xff, 0xda, 0x4f, 0xe9, 0x1b, 0xed, 0x8d, 0xf8, 0x74, 0x1f, 0x31, 0x92, 0xb3,
-0x73, 0x17, 0x36, 0xdb, 0x91, 0x30, 0xd6, 0x88, 0x55, 0x6b, 0x34, 0x77, 0x87, 0x7a, 0xe7,
-0xee, 0x06, 0xc6, 0x1c, 0x8c, 0x19, 0x0c, 0x48, 0x46, 0x23, 0x5e, 0x9c, 0x07, 0x5c, 0xbf,
-0xb4, 0x7e, 0xd6, 0x4f, 0x74, 0x9c, 0xe2, 0xc5, 0x50, 0x8b, 0xc5, 0x8b, 0x15, 0x90, 0x60,
-0x62, 0x57, 0x29, 0xd0, 0x13, 0x43, 0xa1, 0x80, 0x88, 0x91, 0x00, 0x44, 0xc7, 0x4d, 0x19,
-0x86, 0xcc, 0x2f, 0x2a, 0x75, 0x5a, 0xfc, 0xeb, 0x97, 0x2a, 0x70, 0xe3, 0x78, 0xd8, 0x91,
-0xb0, 0x4f, 0x99, 0x07, 0xa3, 0x95, 0xea, 0x24, 0x21, 0xd5, 0xde, 0x51, 0x20, 0x93, 0x27,
-0x0a, 0x30, 0x73, 0xa8, 0xff, 0x8a, 0x97, 0xe9, 0xa7, 0x6a, 0x8e, 0x0d, 0xe8, 0xf0, 0xdf,
-0xec, 0xea, 0xb4, 0x6c, 0x1d, 0x39, 0x2a, 0x62, 0x2d, 0x3d, 0x5a, 0x8b, 0x65, 0xf8, 0x90,
-0x05, 0x2e, 0x7e, 0x91, 0x2c, 0x78, 0xef, 0x8e, 0x7a, 0xc1, 0x2f, 0xac, 0x78, 0xee, 0xaf,
-0x28, 0x45, 0x06, 0x4c, 0x26, 0xaf, 0x3b, 0xa2, 0xdb, 0xa3, 0x93, 0x06, 0xb5, 0x3c, 0xa5,
-0xd8, 0xee, 0x8f, 0xaf, 0x25, 0xcc, 0x3f, 0x85, 0x68, 0x48, 0xa9, 0x62, 0xcc, 0x97, 0x8f,
-0x7f, 0x2a, 0xea, 0xe0, 0x15, 0x0a, 0xad, 0x62, 0x07, 0xbd, 0x45, 0xf8, 0x41, 0xd8, 0x36,
-0xcb, 0x4c, 0xdb, 0x6e, 0xe6, 0x3a, 0xe7, 0xda, 0x15, 0xe9, 0x29, 0x1e, 0x12, 0x10, 0xa0,
-0x14, 0x2c, 0x0e, 0x3d, 0xf4, 0xbf, 0x39, 0x41, 0x92, 0x75, 0x0b, 0x25, 0x7b, 0xa3, 0xce,
-0x39, 0x9c, 0x15, 0x64, 0xc8, 0xfa, 0x3d, 0xef, 0x73, 0x27, 0xfe, 0x26, 0x2e, 0xce, 0xda,
-0x6e, 0xfd, 0x71, 0x8e, 0xdd, 0xfe, 0x76, 0xee, 0xdc, 0x12, 0x5c, 0x02, 0xc5, 0x3a, 0x4e,
-0x4e, 0x4f, 0xbf, 0xca, 0x40, 0x15, 0xc7, 0x6e, 0x8d, 0x41, 0xf1, 0x10, 0xe0, 0x4f, 0x7e,
-0x97, 0x7f, 0x1c, 0xae, 0x47, 0x8e, 0x6b, 0xb1, 0x25, 0x31, 0xb0, 0x73, 0xc7, 0x1b, 0x97,
-0x79, 0xf9, 0x80, 0xd3, 0x66, 0x22, 0x30, 0x07, 0x74, 0x1e, 0xe4, 0xd0, 0x80, 0x21, 0xd6,
-0xee, 0x6b, 0x6c, 0x4f, 0xbf, 0xf5, 0xb7, 0xd9, 0x09, 0x87, 0x2f, 0xa9, 0x14, 0xbe, 0x27,
-0xd9, 0x72, 0x50, 0x01, 0xd4, 0x13, 0x73, 0xa6, 0xa7, 0x51, 0x02, 0x75, 0x25, 0xe1, 0xb3,
-0x45, 0x34, 0x7d, 0xa8, 0x8e, 0xeb, 0xf3, 0x16, 0x49, 0xcb, 0x4f, 0x8c, 0xa1, 0xb9, 0x36,
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-0xb4, 0xcb, 0x14, 0xaa, 0xb7, 0xcd, 0xf9, 0x51, 0x20, 0xa3, 0xc4, 0xeb, 0x35, 0xc9, 0xf1,
-0x60, 0x42, 0x06, 0x8e, 0x7f, 0x7c, 0x7a, 0x76, 0x6e, 0x3f, 0xfc, 0x7a, 0x76, 0x6e, 0x5e,
-0x3e, 0xfe, 0x7e, 0x5f, 0x3c, 0xdb, 0x15, 0x89, 0x71, 0x41, 0xe1, 0x21, 0xc0, 0xe3, 0x44,
-0xeb, 0x54, 0x2a, 0xb7, 0xcd, 0xf9, 0x70, 0x62, 0x27, 0xad, 0xd8, 0x32, 0xc7, 0x0c, 0x7b,
-0x74, 0x4b, 0x14, 0xaa, 0xb7, 0xec, 0x3b, 0xd5, 0x28, 0xd2, 0x07, 0x6d, 0x39, 0xd1, 0x20,
-0xc2, 0xe7, 0x4c, 0x1a, 0x97, 0x8d, 0x98, 0xb2, 0xc7, 0x0c, 0x59, 0x28, 0xf3, 0x9b };
-
-// clang-format off
diff --git a/keyboards/ploopyco/trackball/rules.mk b/keyboards/ploopyco/trackball/rules.mk
index e1eb998fe..4ac92ebf6 100644
--- a/keyboards/ploopyco/trackball/rules.mk
+++ b/keyboards/ploopyco/trackball/rules.mk
@@ -24,6 +24,6 @@ POINTING_DEVICE_ENABLE = yes
 MOUSEKEY_ENABLE = yes       # Mouse keys
 
 QUANTUM_LIB_SRC += analog.c spi_master.c
-SRC += pmw3360.c opt_encoder.c
+SRC += drivers/sensors/pmw3360.c opt_encoder.c
 
 DEFAULT_FOLDER = ploopyco/trackball/rev1_005
diff --git a/keyboards/ploopyco/trackball/trackball.h b/keyboards/ploopyco/trackball/trackball.h
index fd2bf465a..70f5d83b1 100644
--- a/keyboards/ploopyco/trackball/trackball.h
+++ b/keyboards/ploopyco/trackball/trackball.h
@@ -20,7 +20,7 @@
 
 #include "quantum.h"
 #include "spi_master.h"
-#include "pmw3360.h"
+#include "drivers/sensors/pmw3360.h"
 #include "analog.h"
 #include "opt_encoder.h"
 #include "pointing_device.h"
diff --git a/keyboards/ploopyco/trackball_mini/rules.mk b/keyboards/ploopyco/trackball_mini/rules.mk
index 58fad239f..22c5e3c06 100644
--- a/keyboards/ploopyco/trackball_mini/rules.mk
+++ b/keyboards/ploopyco/trackball_mini/rules.mk
@@ -27,6 +27,6 @@ POINTING_DEVICE_ENABLE = yes
 MOUSEKEY_ENABLE = no        # Mouse keys
 
 QUANTUM_LIB_SRC += analog.c
-SRC += adns5050.c opt_encoder.c
+SRC += drivers/sensors/adns5050.c opt_encoder.c
 
 DEFAULT_FOLDER = ploopyco/trackball_mini/rev1_001
diff --git a/keyboards/ploopyco/trackball_mini/trackball_mini.h b/keyboards/ploopyco/trackball_mini/trackball_mini.h
index a12d12a0c..7bcb02a94 100644
--- a/keyboards/ploopyco/trackball_mini/trackball_mini.h
+++ b/keyboards/ploopyco/trackball_mini/trackball_mini.h
@@ -20,7 +20,7 @@
 #pragma once
 
 #include "quantum.h"
-#include "adns5050.h"
+#include "drivers/sensors/adns5050.h"
 #include "analog.h"
 #include "opt_encoder.h"
 #include "pointing_device.h"
diff --git a/keyboards/ploopyco/trackball_nano/rules.mk b/keyboards/ploopyco/trackball_nano/rules.mk
index 0286194b9..f47c31615 100644
--- a/keyboards/ploopyco/trackball_nano/rules.mk
+++ b/keyboards/ploopyco/trackball_nano/rules.mk
@@ -27,6 +27,6 @@ POINTING_DEVICE_ENABLE = yes
 MOUSEKEY_ENABLE = no        # Mouse keys
 
 QUANTUM_LIB_SRC += analog.c
-SRC += adns5050.c opt_encoder.c
+SRC += drivers/sensors/adns5050.c opt_encoder.c
 
 DEFAULT_FOLDER = ploopyco/trackball_nano/rev1_001
diff --git a/keyboards/ploopyco/trackball_nano/trackball_nano.h b/keyboards/ploopyco/trackball_nano/trackball_nano.h
index 5692383b1..6c8ecace7 100644
--- a/keyboards/ploopyco/trackball_nano/trackball_nano.h
+++ b/keyboards/ploopyco/trackball_nano/trackball_nano.h
@@ -20,7 +20,7 @@
 #pragma once
 
 #include "quantum.h"
-#include "adns5050.h"
+#include "drivers/sensors/adns5050.h"
 #include "analog.h"
 #include "opt_encoder.h"
 #include "pointing_device.h"
diff --git a/keyboards/ramonimbao/chevron/info.json b/keyboards/ramonimbao/chevron/info.json
index 11ed02e53..2a88fedb1 100644
--- a/keyboards/ramonimbao/chevron/info.json
+++ b/keyboards/ramonimbao/chevron/info.json
@@ -1,7 +1,5 @@
 {
     "keyboard_name": "Chevron",
-    "url": "",
-    "maintainer": "",
     "width": 14.5,
     "height": 5,
     "layouts": {
diff --git a/keyboards/sendyyeah/75pixels/info.json b/keyboards/sendyyeah/75pixels/info.json
index 20d158cf7..d952cac13 100644
--- a/keyboards/sendyyeah/75pixels/info.json
+++ b/keyboards/sendyyeah/75pixels/info.json
@@ -7,7 +7,7 @@
     "layouts": {
         "LAYOUT_ortho_5x15": {
             "layout": [
-                {"label": "Esc", "X": 0, "y": 0},
+                {"label": "Esc", "x": 0, "y": 0},
                 {"label": "1", "x": 1, "y": 0},
                 {"label": "2", "x": 2, "y": 0},
                 {"label": "3", "x": 3, "y": 0},
@@ -22,21 +22,21 @@
                 {"label": "NumLock", "x": 12, "y": 0},
                 {"label": "/", "x": 13, "y": 0},
                 {"label": "*", "x": 14, "y": 0},
-                {"label": "Tab", "X": 0, "y": 1},
-                {"label": "Q", "X": 1, "y": 1},
-                {"label": "W", "X": 2, "y": 1},
-                {"label": "E", "X": 3, "y": 1},
-                {"label": "R", "X": 4, "y": 1},
-                {"label": "T", "X": 5, "y": 1},
-                {"label": "Y", "X": 6, "y": 1},
-                {"label": "U", "X": 7, "y": 1},
-                {"label": "I", "X": 8, "y": 1},
-                {"label": "O", "X": 9, "y": 1},
-                {"label": "P", "X": 10, "y": 1},
-                {"label": "|\n\\", "X": 11, "y": 1},
-                {"label": "7\nHome", "X": 12, "y": 1},
-                {"label": "8\nUp", "X": 13, "y": 1},
-                {"label": "9\nPgUp", "X": 14, "y": 1},
+                {"label": "Tab", "x": 0, "y": 1},
+                {"label": "Q", "x": 1, "y": 1},
+                {"label": "W", "x": 2, "y": 1},
+                {"label": "E", "x": 3, "y": 1},
+                {"label": "R", "x": 4, "y": 1},
+                {"label": "T", "x": 5, "y": 1},
+                {"label": "Y", "x": 6, "y": 1},
+                {"label": "U", "x": 7, "y": 1},
+                {"label": "I", "x": 8, "y": 1},
+                {"label": "O", "x": 9, "y": 1},
+                {"label": "P", "x": 10, "y": 1},
+                {"label": "|\n\\", "x": 11, "y": 1},
+                {"label": "7\nHome", "x": 12, "y": 1},
+                {"label": "8\nUp", "x": 13, "y": 1},
+                {"label": "9\nPgUp", "x": 14, "y": 1},
                 {"label": "Caps", "x": 0, "y": 2},
                 {"label": "A", "x": 1, "y": 2},
                 {"label": "S", "x": 2, "y": 2},
@@ -67,21 +67,21 @@
                 {"label": "1\nEnd", "x": 12, "y": 3},
                 {"label": "2\nDown", "x": 13, "y": 3},
                 {"label": "3\nPgDn", "x": 14, "y": 3},
-                {"label": "Ctrl", "X": 0, "y": 4},
-                {"label": "Win", "X": 1, "y": 4},
-                {"label": "Alt", "X": 2, "y": 4},
-                {"label": "Fn", "X": 3, "y": 4},
-                {"label": "Lower", "X": 4, "y": 4},
-                {"label": "Space", "X": 5, "y": 4},
-                {"label": "Space", "X": 6, "y": 4},
-                {"label": "Raise", "X": 7, "y": 4},
-                {"label": "Alt", "X": 8, "y": 4},
-                {"label": "Win", "X": 9, "y": 4},
-                {"label": "Menu", "X": 10, "y": 4},
-                {"label": "Ctrl", "X": 11, "y": 4},
-                {"label": "0\nIns", "X": 12, "y": 4},
-                {"label": ".\nDel", "X": 13, "y": 4},
-                {"label": "Enter", "X": 14, "y": 4}
+                {"label": "Ctrl", "x": 0, "y": 4},
+                {"label": "Win", "x": 1, "y": 4},
+                {"label": "Alt", "x": 2, "y": 4},
+                {"label": "Fn", "x": 3, "y": 4},
+                {"label": "Lower", "x": 4, "y": 4},
+                {"label": "Space", "x": 5, "y": 4},
+                {"label": "Space", "x": 6, "y": 4},
+                {"label": "Raise", "x": 7, "y": 4},
+                {"label": "Alt", "x": 8, "y": 4},
+                {"label": "Win", "x": 9, "y": 4},
+                {"label": "Menu", "x": 10, "y": 4},
+                {"label": "Ctrl", "x": 11, "y": 4},
+                {"label": "0\nIns", "x": 12, "y": 4},
+                {"label": ".\nDel", "x": 13, "y": 4},
+                {"label": "Enter", "x": 14, "y": 4}
             ]
         }
     }
diff --git a/keyboards/setta21/keymaps/salicylic/config.h b/keyboards/setta21/keymaps/salicylic/config.h
index 44b34aa2f..06e23ba7a 100644
--- a/keyboards/setta21/keymaps/salicylic/config.h
+++ b/keyboards/setta21/keymaps/salicylic/config.h
@@ -27,7 +27,7 @@
 #    define RGB_MATRIX_KEYPRESSES  // reacts to keypresses
 // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true  // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED  // turn off effects when suspended
 // #   define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 // #   define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 // #   define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150  // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
@@ -37,4 +37,3 @@
 #    define RGB_MATRIX_VAL_STEP 5
 #    define RGB_MATRIX_SPD_STEP 10
 #endif
-
diff --git a/keyboards/sofle/keymaps/devdev/config.h b/keyboards/sofle/keymaps/devdev/config.h
index 7d597d991..32d071735 100644
--- a/keyboards/sofle/keymaps/devdev/config.h
+++ b/keyboards/sofle/keymaps/devdev/config.h
@@ -1,18 +1,18 @@
  /* Copyright 2021 Dane Evans
-  * 
-  * This program is free software: you can redistribute it and/or modify 
-  * it under the terms of the GNU General Public License as published by 
-  * the Free Software Foundation, either version 2 of the License, or 
-  * (at your option) any later version. 
-  * 
-  * This program is distributed in the hope that it will be useful, 
-  * but WITHOUT ANY WARRANTY; without even the implied warranty of 
-  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
-  * GNU General Public License for more details. 
-  * 
-  * You should have received a copy of the GNU General Public License 
-  * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
-*/  
+  *
+  * This program is free software: you can redistribute it and/or modify
+  * it under the terms of the GNU General Public License as published by
+  * the Free Software Foundation, either version 2 of the License, or
+  * (at your option) any later version.
+  *
+  * This program is distributed in the hope that it will be useful,
+  * but WITHOUT ANY WARRANTY; without even the implied warranty of
+  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  * GNU General Public License for more details.
+  *
+  * You should have received a copy of the GNU General Public License
+  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
   #pragma once
 
 
@@ -29,7 +29,7 @@
 
 #define CUSTOM_FONT
 
-#define CUSTOM_LAYER_READ //if you remove this it causes issues - needs better guarding 
+#define CUSTOM_LAYER_READ //if you remove this it causes issues - needs better guarding
 
 
 #define TAPPING_FORCE_HOLD
@@ -56,7 +56,7 @@
 
 #ifdef RGBLIGHT_ENABLE
     #undef RGBLED_NUM
-        
+
     //#define RGBLIGHT_ANIMATIONS
         //#define RGBLIGHT_EFFECT_BREATHING
         #define RGBLIGHT_EFFECT_RAINBOW_MOOD
@@ -68,11 +68,11 @@
         //#define RGBLIGHT_EFFECT_RGB_TEST
         //#define RGBLIGHT_EFFECT_ALTERNATING
         //#define RGBLIGHT_EFFECT_TWINKLE
-        
+
     #define RGBLED_NUM 70
         //#define RGBLED_SPLIT
-        #define RGBLED_SPLIT { 35, 35 } // haven't figured out how to use this yet 
-        
+        #define RGBLED_SPLIT { 35, 35 } // haven't figured out how to use this yet
+
         //#define RGBLED_NUM 30
     #define RGBLIGHT_LIMIT_VAL 120
     #define RGBLIGHT_HUE_STEP 10
@@ -84,11 +84,11 @@
 #   define RGB_MATRIX_KEYPRESSES // reacts to keypresses
 // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#   define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#   define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #   define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 // #   define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 // #   define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
-#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150 // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash. 
+#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150 // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash.
 
 #define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_GRADIENT_LEFT_RIGHT
 
@@ -127,4 +127,4 @@
 // #   define DISABLE_RGB_MATRIX_MULTISPLASH
 // #   define DISABLE_RGB_MATRIX_SOLID_SPLASH
 // #   define DISABLE_RGB_MATRIX_SOLID_MULTISPLASH
-#endif
\ No newline at end of file
+#endif
diff --git a/keyboards/sofle/keymaps/killmaster/config.h b/keyboards/sofle/keymaps/killmaster/config.h
new file mode 100644
index 000000000..2e6abe84e
--- /dev/null
+++ b/keyboards/sofle/keymaps/killmaster/config.h
@@ -0,0 +1,64 @@
+/* Copyright 2021 Carlos Martins
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+/* The way how "handedness" is decided (which half is which),
+see https://docs.qmk.fm/#/feature_split_keyboard?id=setting-handedness
+for more options.
+*/
+
+#define RGB_DI_PIN D3
+
+#ifdef RGB_MATRIX_ENABLE
+
+#define RGBLED_NUM 72
+#define DRIVER_LED_TOTAL RGBLED_NUM
+#define RGB_MATRIX_MAXIMUM_BRIGHTNESS 120 // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash.
+#define RGB_MATRIX_HUE_STEP 8
+#define RGB_MATRIX_SAT_STEP 8
+#define RGB_MATRIX_VAL_STEP 8
+#define RGB_MATRIX_SPD_STEP 10
+#define RGB_MATRIX_KEYPRESSES
+#define RGB_MATRIX_FRAMEBUFFER_EFFECTS
+#define RGB_MATRIX_SPLIT {36,36}
+#define SPLIT_TRANSPORT_MIRROR
+
+#endif
+
+#ifdef RGBLIGHT_ENABLE
+#define RGBLIGHT_SPLIT
+#define RGBLED_NUM 70
+#define RGB_SPLIT {36,36}
+#define RGBLIGHT_LIMIT_VAL 120
+//   #define RGBLIGHT_SLEEP  /* If defined, the RGB lighting will be switched off when the host goes to sleep */
+// /*== all animations enable ==*/
+//   #define RGBLIGHT_ANIMATIONS
+// /*== or choose animations ==*/
+//   #define RGBLIGHT_EFFECT_BREATHING
+   //#define RGBLIGHT_EFFECT_RAINBOW_MOOD
+   //#define RGBLIGHT_EFFECT_RAINBOW_SWIRL
+//   #define RGBLIGHT_EFFECT_SNAKE
+//   #define RGBLIGHT_EFFECT_KNIGHT
+//   #define RGBLIGHT_EFFECT_CHRISTMAS
+   #define RGBLIGHT_EFFECT_STATIC_GRADIENT
+   #define RGBLIGHT_EFFECT_RGB_TEST
+//   #define RGBLIGHT_EFFECT_ALTERNATING
+#endif
+
+#define MEDIA_KEY_DELAY 2
+
+#define USB_POLLING_INTERVAL_MS 1
+#define QMK_KEYS_PER_SCAN 12
diff --git a/keyboards/sofle/keymaps/killmaster/keymap.c b/keyboards/sofle/keymaps/killmaster/keymap.c
new file mode 100644
index 000000000..950dee36b
--- /dev/null
+++ b/keyboards/sofle/keymaps/killmaster/keymap.c
@@ -0,0 +1,403 @@
+/* Copyright 2021 Carlos Martins
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include QMK_KEYBOARD_H
+#include <stdio.h>
+
+enum sofle_layers {
+    /* _M_XYZ = Mac Os, _W_XYZ = Win/Linux */
+    _QWERTY,
+    _LOWER,
+    _RAISE,
+    _ADJUST,
+};
+
+enum custom_keycodes {
+    KC_QWERTY = SAFE_RANGE,
+    KC_LOWER,
+    KC_RAISE,
+    KC_ADJUST,
+    KC_PRVWD,
+    KC_NXTWD,
+    KC_LSTRT,
+    KC_LEND,
+    KC_DLINE
+};
+
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+/*
+ * QWERTY
+ * ,-----------------------------------------.                    ,-----------------------------------------.
+ * |  `   |   1  |   2  |   3  |   4  |   5  |                    |   6  |   7  |   8  |   9  |   0  |  `   |
+ * |------+------+------+------+------+------|                    |------+------+------+------+------+------|
+ * | ESC  |   Q  |   W  |   E  |   R  |   T  |                    |   Y  |   U  |   I  |   O  |   P  | Bspc |
+ * |------+------+------+------+------+------|                    |------+------+------+------+------+------|
+ * | Tab  |   A  |   S  |   D  |   F  |   G  |-------.    ,-------|   H  |   J  |   K  |   L  |   ;  |  '   |
+ * |------+------+------+------+------+------|       |    |       |------+------+------+------+------+------|
+ * |LShift|   Z  |   X  |   C  |   V  |   B  |-------|    |-------|   N  |   M  |   ,  |   .  |   /  |RShift|
+ * `-----------------------------------------/       /     \      \-----------------------------------------'
+ *            | LGUI | LAlt | LCTR |LOWER | /Space  /       \Enter \  |RAISE | RCTR | RAlt | RGUI |
+ *            |      |      |      |      |/       /         \      \ |      |      |      |      |
+ *            `----------------------------------'           '------''---------------------------'
+ */
+
+[_QWERTY] = LAYOUT(
+  KC_GRV,   KC_1,   KC_2,    KC_3,    KC_4,    KC_5,                     KC_6,    KC_7,    KC_8,    KC_9,    KC_0,  KC_MINS,
+  KC_ESC,   KC_Q,   KC_W,    KC_E,    KC_R,    KC_T,                     KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,  KC_BSPC,
+  KC_TAB,   KC_A,   KC_S,    KC_D,    KC_F,    KC_G,                     KC_H,    KC_J,    KC_K,    KC_L, KC_SCLN,  KC_QUOT,
+  KC_LSPO,  KC_Z,   KC_X,    KC_C,    KC_V,    KC_B, KC_MUTE,     KC_MPLY,KC_N,    KC_M, KC_COMM,  KC_DOT, KC_SLSH,  KC_RSPC,
+                 KC_LGUI,KC_LALT,KC_LCTRL, KC_LOWER, KC_SPC,      KC_ENT,  KC_RAISE, KC_RCTRL, KC_RALT, KC_RGUI
+),
+/* LOWER
+ * ,-----------------------------------------.                    ,-----------------------------------------.
+ * |      |  F1  |  F2  |  F3  |  F4  |  F5  |                    |  F6  |  F7  |  F8  |  F9  | F10  | F11  |
+ * |------+------+------+------+------+------|                    |------+------+------+------+------+------|
+ * |  `   |   1  |   2  |   3  |   4  |   5  |                    |   6  |   7  |   8  |   9  |   0  | F12  |
+ * |------+------+------+------+------+------|                    |------+------+------+------+------+------|
+ * | Tab  |   !  |   @  |   #  |   $  |   %  |-------.    ,-------|   ^  |   &  |   *  |   (  |   )  |   |  |
+ * |------+------+------+------+------+------|  MUTE |    |       |------+------+------+------+------+------|
+ * | Shift|  =   |  -   |  +   |   {  |   }  |-------|    |-------|   [  |   ]  |   ;  |   :  |   \  | Shift|
+ * `-----------------------------------------/       /     \      \-----------------------------------------'
+ *            | LGUI | LAlt | LCTR |LOWER | /Enter  /       \Space \  |RAISE | RCTR | RAlt | RGUI |
+ *            |      |      |      |      |/       /         \      \ |      |      |      |      |
+ *            `----------------------------------'           '------''---------------------------'
+ */
+[_LOWER] = LAYOUT(
+  _______,   KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,                       KC_F6,   KC_F7,   KC_F8,   KC_F9,  KC_F10,  KC_F11,
+  KC_GRV,    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,                       KC_6,    KC_7,    KC_8,    KC_9,    KC_0,  KC_F12,
+  _______, KC_EXLM,   KC_AT, KC_HASH,  KC_DLR, KC_PERC,                       KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_PIPE,
+  _______,  KC_EQL, KC_MINS, KC_PLUS, KC_LCBR, KC_RCBR, _______,       _______, KC_LBRC, KC_RBRC, KC_SCLN, KC_COLN, KC_BSLS, _______,
+                       _______, _______, _______, _______, _______,       _______, _______, _______, _______, _______
+),
+/* RAISE
+ * ,----------------------------------------.                    ,-----------------------------------------.
+ * |      |      |      |      |      |      |                    |      |      |      |      |      |      |
+ * |------+------+------+------+------+------|                    |------+------+------+------+------+------|
+ * | Esc  | Ins  | Pscr | Menu |      |RGBTog|                    |      | PWrd |  Up  | NWrd | DLine| Bspc |
+ * |------+------+------+------+------+------|                    |------+------+------+------+------+------|
+ * | Tab  | LAt  | LCtl |LShift|      | Caps |-------.    ,-------|      | Left | Down | Rigth|  Del | Bspc |
+ * |------+------+------+------+------+------|  MUTE  |    |       |------+------+------+------+------+------|
+ * |Shift | Undo |  Cut | Copy | Paste|      |-------|    |-------|      | LStr |      | LEnd |      | Shift|
+ * `-----------------------------------------/       /     \      \-----------------------------------------'
+ *            | LGUI | LAlt | LCTR |LOWER | /Enter  /       \Space \  |RAISE | RCTR | RAlt | RGUI |
+ *            |      |      |      |      |/       /         \      \ |      |      |      |      |
+ *            `----------------------------------'           '------''---------------------------'
+ */
+[_RAISE] = LAYOUT(
+  _______, _______ , _______ , _______ , RGB_RMOD , RGB_MOD,                           _______,  _______  , _______,  _______ ,  _______ ,_______,
+  _______,  KC_INS,  KC_PSCR,   KC_APP,  XXXXXXX, RGB_TOG,                        KC_PGUP, KC_PRVWD,   KC_UP, KC_NXTWD,KC_DLINE, KC_BSPC,
+  _______, KC_LALT,  KC_LCTL,  KC_LSFT,  XXXXXXX, KC_CAPS,                       KC_PGDN,  KC_LEFT, KC_DOWN, KC_RGHT,  KC_DEL, KC_BSPC,
+  _______,XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,  _______,       _______,  XXXXXXX, KC_LSTRT, XXXXXXX, KC_LEND,   XXXXXXX, _______,
+                         _______, _______, _______, _______, _______,       _______, _______, _______, _______, _______
+),
+/* ADJUST
+ * ,-----------------------------------------.                    ,-----------------------------------------.
+ * |      |      |      |      |      |      |                    |      |      |      |      |      |      |
+ * |------+------+------+------+------+------|                    |------+------+------+------+------+------|
+ * | RESET|      |QWERTY|COLEMAK|      |      |                    |      |      |      |      |      |      |
+ * |------+------+------+------+------+------|                    |------+------+------+------+------+------|
+ * |      |      |MACWIN|      |      |      |-------.    ,-------|      | VOLDO| MUTE | VOLUP|      |      |
+ * |------+------+------+------+------+------|  MUTE |    |       |------+------+------+------+------+------|
+ * |      |      |      |      |      |      |-------|    |-------|      | PREV | PLAY | NEXT |      |      |
+ * `-----------------------------------------/       /     \      \-----------------------------------------'
+ *            | LGUI | LAlt | LCTR |LOWER | /Enter  /       \Space \  |RAISE | RCTR | RAlt | RGUI |
+ *            |      |      |      |      |/       /         \      \ |      |      |      |      |
+ *            `----------------------------------'           '------''---------------------------'
+ */
+  [_ADJUST] = LAYOUT(
+  XXXXXXX , XXXXXXX,  XXXXXXX ,  XXXXXXX , XXXXXXX, XXXXXXX,                     XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+  RESET  , XXXXXXX, KC_QWERTY,  XXXXXXX , CG_TOGG,XXXXXXX,                     XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+  XXXXXXX , XXXXXXX,CG_TOGG, XXXXXXX,    XXXXXXX,  XXXXXXX,                     XXXXXXX, KC_VOLD, KC_MUTE, KC_VOLU, XXXXXXX, XXXXXXX,
+  XXXXXXX , XXXXXXX, XXXXXXX, XXXXXXX,    XXXXXXX,  XXXXXXX, XXXXXXX,     XXXXXXX, XXXXXXX, KC_MPRV, KC_MPLY, KC_MNXT, XXXXXXX, XXXXXXX,
+                   _______, _______, _______, _______, _______,     _______, _______, _______, _______, _______
+  )
+};
+
+#ifdef OLED_DRIVER_ENABLE
+
+static void render_logo(void) {
+    static const char PROGMEM bananas_logo[] = {
+        // 'killmaster_bananas', 128x32px
+        0x00, 0x00, 0x80, 0x80, 0xc0, 0xc0, 0xc0, 0xe0, 0x02, 0x0e, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8,
+        0x00, 0x00, 0x80, 0xc0, 0x40, 0x00, 0x00, 0x00, 0x40, 0x40, 0xd8, 0xc8, 0x00, 0x00, 0x00, 0x00,
+        0x08, 0x08, 0xf8, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x08, 0xf8, 0xf8, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0xc0, 0x40, 0x40, 0xc0, 0x80, 0x40, 0xc0, 0x00, 0x00, 0x00, 0x40, 0x40, 0x40, 0x40,
+        0x80, 0x00, 0x00, 0x00, 0x00, 0x80, 0x40, 0x40, 0x40, 0xc0, 0x40, 0x00, 0x00, 0x40, 0x40, 0xf0,
+        0x40, 0x40, 0x40, 0x00, 0x00, 0x00, 0x00, 0x80, 0x40, 0x40, 0x40, 0xc0, 0x80, 0x00, 0x00, 0x00,
+        0x40, 0xc0, 0x80, 0x40, 0x40, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x01, 0x0f, 0x3f, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xfc, 0xf8, 0xf0, 0xf0,
+        0xe0, 0xc0, 0xc0, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f,
+        0x02, 0x07, 0x0d, 0x10, 0x20, 0x20, 0x00, 0x00, 0x20, 0x20, 0x3f, 0x3f, 0x20, 0x20, 0x00, 0x00,
+        0x00, 0x00, 0x1f, 0x3f, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x3f, 0x20, 0x20, 0x20,
+        0x00, 0x00, 0x3f, 0x00, 0x00, 0x3f, 0x00, 0x00, 0x3f, 0x00, 0x00, 0x1c, 0x36, 0x22, 0x22, 0x22,
+        0x1f, 0x20, 0x00, 0x00, 0x10, 0x23, 0x22, 0x22, 0x26, 0x3c, 0x18, 0x00, 0x00, 0x00, 0x00, 0x1f,
+        0x30, 0x20, 0x20, 0x20, 0x00, 0x00, 0x0f, 0x1f, 0x32, 0x22, 0x22, 0x32, 0x23, 0x00, 0x00, 0x00,
+        0x20, 0x3f, 0x21, 0x20, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0x07, 0x07, 0x0f, 0x0f, 0x0f, 0x1f, 0x1f,
+        0x1f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3e, 0x3e, 0x1c, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+        };
+    oled_write_raw_P(bananas_logo, sizeof(bananas_logo));
+}
+
+static void print_status_narrow(void) {
+    // Print current mode
+    oled_write_P(PSTR("Sofle"), false);
+    oled_write_P(PSTR("\n\n\n"), false);
+    switch (get_highest_layer(default_layer_state)) {
+        case _QWERTY:
+            oled_write_ln_P(PSTR("QWERT"), false);
+            break;
+        default:
+            oled_write_P(PSTR("Undef"), false);
+    }
+    oled_write_P(PSTR("\n\n"), false);
+    // Print current layer
+    oled_write_ln_P(PSTR("Layer"), false);
+    switch (get_highest_layer(layer_state)) {
+        case _QWERTY:
+            oled_write_P(PSTR("Base\n"), false);
+            break;
+        case _RAISE:
+            oled_write_P(PSTR("Raise"), false);
+            break;
+        case _LOWER:
+            oled_write_P(PSTR("Lower"), false);
+            break;
+        case _ADJUST:
+            oled_write_P(PSTR("Adj\n"), false);
+            break;
+        default:
+            oled_write_ln_P(PSTR("Undef"), false);
+    }
+    oled_write_P(PSTR("\n\n"), false);
+}
+
+oled_rotation_t oled_init_user(oled_rotation_t rotation) {
+    if (is_keyboard_master()) {
+        return OLED_ROTATION_270;
+    }
+    else {
+        return OLED_ROTATION_180;
+    }
+    return rotation;
+}
+
+void oled_task_user(void) {
+    if (is_keyboard_master()) {
+        print_status_narrow();
+    } else {
+        render_logo();
+    }
+}
+
+
+
+#endif // OLED_DRIVER_ENABLE
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+    switch (keycode) {
+        case KC_QWERTY:
+            if (record->event.pressed) {
+                set_single_persistent_default_layer(_QWERTY);
+            }
+            return false;
+        case KC_LOWER:
+            if (record->event.pressed) {
+                layer_on(_LOWER);
+                update_tri_layer(_LOWER, _RAISE, _ADJUST);
+            } else {
+                layer_off(_LOWER);
+                update_tri_layer(_LOWER, _RAISE, _ADJUST);
+            }
+            return false;
+        case KC_RAISE:
+            if (record->event.pressed) {
+                layer_on(_RAISE);
+                update_tri_layer(_LOWER, _RAISE, _ADJUST);
+            } else {
+                layer_off(_RAISE);
+                update_tri_layer(_LOWER, _RAISE, _ADJUST);
+            }
+            return false;
+        case KC_ADJUST:
+            if (record->event.pressed) {
+                layer_on(_ADJUST);
+            } else {
+                layer_off(_ADJUST);
+            }
+            return false;
+        case KC_PRVWD:
+            if (record->event.pressed) {
+                if (keymap_config.swap_lctl_lgui) {
+                    register_mods(mod_config(MOD_LALT));
+                    register_code(KC_LEFT);
+                } else {
+                    register_mods(mod_config(MOD_LCTL));
+                    register_code(KC_LEFT);
+                }
+            } else {
+                if (keymap_config.swap_lctl_lgui) {
+                    unregister_mods(mod_config(MOD_LALT));
+                    unregister_code(KC_LEFT);
+                } else {
+                    unregister_mods(mod_config(MOD_LCTL));
+                    unregister_code(KC_LEFT);
+                }
+            }
+            break;
+        case KC_NXTWD:
+             if (record->event.pressed) {
+                if (keymap_config.swap_lctl_lgui) {
+                    register_mods(mod_config(MOD_LALT));
+                    register_code(KC_RIGHT);
+                } else {
+                    register_mods(mod_config(MOD_LCTL));
+                    register_code(KC_RIGHT);
+                }
+            } else {
+                if (keymap_config.swap_lctl_lgui) {
+                    unregister_mods(mod_config(MOD_LALT));
+                    unregister_code(KC_RIGHT);
+                } else {
+                    unregister_mods(mod_config(MOD_LCTL));
+                    unregister_code(KC_RIGHT);
+                }
+            }
+            break;
+        case KC_LSTRT:
+            if (record->event.pressed) {
+                if (keymap_config.swap_lctl_lgui) {
+                     //CMD-arrow on Mac, but we have CTL and GUI swapped
+                    register_mods(mod_config(MOD_LCTL));
+                    register_code(KC_LEFT);
+                } else {
+                    register_code(KC_HOME);
+                }
+            } else {
+                if (keymap_config.swap_lctl_lgui) {
+                    unregister_mods(mod_config(MOD_LCTL));
+                    unregister_code(KC_LEFT);
+                } else {
+                    unregister_code(KC_HOME);
+                }
+            }
+            break;
+        case KC_LEND:
+            if (record->event.pressed) {
+                if (keymap_config.swap_lctl_lgui) {
+                    //CMD-arrow on Mac, but we have CTL and GUI swapped
+                    register_mods(mod_config(MOD_LCTL));
+                    register_code(KC_RIGHT);
+                } else {
+                    register_code(KC_END);
+                }
+            } else {
+                if (keymap_config.swap_lctl_lgui) {
+                    unregister_mods(mod_config(MOD_LCTL));
+                    unregister_code(KC_RIGHT);
+                } else {
+                    unregister_code(KC_END);
+                }
+            }
+            break;
+        case KC_DLINE:
+            if (record->event.pressed) {
+                register_mods(mod_config(MOD_LCTL));
+                register_code(KC_BSPC);
+            } else {
+                unregister_mods(mod_config(MOD_LCTL));
+                unregister_code(KC_BSPC);
+            }
+            break;
+    }
+    return true;
+}
+
+#ifdef ENCODER_ENABLE
+
+bool encoder_update_user(uint8_t index, bool clockwise) {
+    uint8_t temp_mod = get_mods();
+    uint8_t temp_osm = get_oneshot_mods();
+    bool    is_ctrl  = (temp_mod | temp_osm) & MOD_MASK_CTRL;
+    bool    is_shift = (temp_mod | temp_osm) & MOD_MASK_SHIFT;
+
+    if (is_shift) {
+        if (index == 0) { /* First encoder */
+            if (clockwise) {
+                rgb_matrix_increase_hue();
+            } else {
+                rgb_matrix_decrease_hue();
+            }
+        } else if (index == 1) { /* Second encoder */
+            if (clockwise) {
+                rgb_matrix_decrease_sat();
+            } else {
+                rgb_matrix_increase_sat();
+            }
+        }
+    } else if (is_ctrl) {
+        if (index == 0) { /* First encoder */
+            if (clockwise) {
+                rgb_matrix_increase_val();
+            } else {
+                rgb_matrix_decrease_val();
+            }
+        } else if (index == 1) { /* Second encoder */
+            if (clockwise) {
+                rgb_matrix_increase_speed();
+            } else {
+                rgb_matrix_decrease_speed();
+            }
+        }
+    } else {
+        if (index == 1) { /* First encoder */
+            if (clockwise) {
+                tap_code(KC_PGUP);
+                // tap_code(KC_MS_WH_UP);
+            } else {
+                tap_code(KC_PGDOWN);
+                // tap_code(KC_MS_WH_DOWN);
+            }
+        } else if (index == 0) { /* Second encoder */
+            uint16_t mapped_code        = 0;
+            if (clockwise) {
+                mapped_code = KC_VOLD;
+            } else {
+                mapped_code = KC_VOLU;
+            }
+            tap_code_delay(mapped_code, MEDIA_KEY_DELAY);
+        }
+    }
+    return true;
+}
+
+#endif
diff --git a/keyboards/sofle/keymaps/killmaster/readme.md b/keyboards/sofle/keymaps/killmaster/readme.md
new file mode 100644
index 000000000..6d6dea228
--- /dev/null
+++ b/keyboards/sofle/keymaps/killmaster/readme.md
@@ -0,0 +1,19 @@
+![SofleKeyboard default keymap](https://github.com/josefadamcik/SofleKeyboard/raw/master/Images/soflekeyboard.png)
+![SofleKeyboard adjust layer](https://github.com/josefadamcik/SofleKeyboard/raw/master/Images/soflekeyboard_layout_adjust.png)
+
+
+# Default keymap for Sofle Keyboard
+
+Layout in [Keyboard Layout Editor](http://www.keyboard-layout-editor.com/#/gists/76efb423a46cbbea75465cb468eef7ff) and [adjust layer](http://www.keyboard-layout-editor.com/#/gists/4bcf66f922cfd54da20ba04905d56bd4)
+
+
+Features:
+
+- Symmetric modifiers (CMD/Super, Alt/Opt, Ctrl, Shift)
+- Various modes, can be switched (using Adjust layer and the selected one is stored in EEPROM.
+- Modes for Qwerty and Colemak support
+- Modes for Mac vs Linux/Win support -> different order of modifiers and different action shortcuts on the "UPPER" layer (the red one in the image). Designed to simplify transtions when switching between operating systems often.
+- The OLED on master half shows selected mode and caps lock state and is rotated.
+- Left encoder controls volume up/down/mute. Right encoder PGUP/PGDOWN.
+
+
diff --git a/keyboards/sofle/keymaps/killmaster/rules.mk b/keyboards/sofle/keymaps/killmaster/rules.mk
new file mode 100644
index 000000000..38d611450
--- /dev/null
+++ b/keyboards/sofle/keymaps/killmaster/rules.mk
@@ -0,0 +1,4 @@
+EXTRAKEY_ENABLE = yes
+LTO_ENABLE = yes
+RGB_MATRIX_ENABLE = yes
+RGB_MATRIX_DRIVER = WS2812
diff --git a/keyboards/sofle/keymaps/rgb_default/config.h b/keyboards/sofle/keymaps/rgb_default/config.h
index 7d597d991..32d071735 100644
--- a/keyboards/sofle/keymaps/rgb_default/config.h
+++ b/keyboards/sofle/keymaps/rgb_default/config.h
@@ -1,18 +1,18 @@
  /* Copyright 2021 Dane Evans
-  * 
-  * This program is free software: you can redistribute it and/or modify 
-  * it under the terms of the GNU General Public License as published by 
-  * the Free Software Foundation, either version 2 of the License, or 
-  * (at your option) any later version. 
-  * 
-  * This program is distributed in the hope that it will be useful, 
-  * but WITHOUT ANY WARRANTY; without even the implied warranty of 
-  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
-  * GNU General Public License for more details. 
-  * 
-  * You should have received a copy of the GNU General Public License 
-  * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
-*/  
+  *
+  * This program is free software: you can redistribute it and/or modify
+  * it under the terms of the GNU General Public License as published by
+  * the Free Software Foundation, either version 2 of the License, or
+  * (at your option) any later version.
+  *
+  * This program is distributed in the hope that it will be useful,
+  * but WITHOUT ANY WARRANTY; without even the implied warranty of
+  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  * GNU General Public License for more details.
+  *
+  * You should have received a copy of the GNU General Public License
+  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
   #pragma once
 
 
@@ -29,7 +29,7 @@
 
 #define CUSTOM_FONT
 
-#define CUSTOM_LAYER_READ //if you remove this it causes issues - needs better guarding 
+#define CUSTOM_LAYER_READ //if you remove this it causes issues - needs better guarding
 
 
 #define TAPPING_FORCE_HOLD
@@ -56,7 +56,7 @@
 
 #ifdef RGBLIGHT_ENABLE
     #undef RGBLED_NUM
-        
+
     //#define RGBLIGHT_ANIMATIONS
         //#define RGBLIGHT_EFFECT_BREATHING
         #define RGBLIGHT_EFFECT_RAINBOW_MOOD
@@ -68,11 +68,11 @@
         //#define RGBLIGHT_EFFECT_RGB_TEST
         //#define RGBLIGHT_EFFECT_ALTERNATING
         //#define RGBLIGHT_EFFECT_TWINKLE
-        
+
     #define RGBLED_NUM 70
         //#define RGBLED_SPLIT
-        #define RGBLED_SPLIT { 35, 35 } // haven't figured out how to use this yet 
-        
+        #define RGBLED_SPLIT { 35, 35 } // haven't figured out how to use this yet
+
         //#define RGBLED_NUM 30
     #define RGBLIGHT_LIMIT_VAL 120
     #define RGBLIGHT_HUE_STEP 10
@@ -84,11 +84,11 @@
 #   define RGB_MATRIX_KEYPRESSES // reacts to keypresses
 // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#   define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#   define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #   define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 // #   define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 // #   define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
-#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150 // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash. 
+#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150 // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash.
 
 #define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_GRADIENT_LEFT_RIGHT
 
@@ -127,4 +127,4 @@
 // #   define DISABLE_RGB_MATRIX_MULTISPLASH
 // #   define DISABLE_RGB_MATRIX_SOLID_SPLASH
 // #   define DISABLE_RGB_MATRIX_SOLID_MULTISPLASH
-#endif
\ No newline at end of file
+#endif
diff --git a/keyboards/sofle/rev1/readme.md b/keyboards/sofle/rev1/readme.md
new file mode 100644
index 000000000..629d568e6
--- /dev/null
+++ b/keyboards/sofle/rev1/readme.md
@@ -0,0 +1,27 @@
+# Sofle Keyboard
+
+![SofleKeyboard version 1](https://raw.githubusercontent.com/josefadamcik/SofleKeyboard/master/Images/IMG_20200126_114622.jpg)
+
+Sofle is 6×4+5 keys column-staggered split keyboard. Based on Lily58, Corne and Helix keyboards.
+
+More details about the keyboard on my blog: [Let me introduce you SofleKeyboard - a split keyboard based on Lily58 and Crkbd](https://josef-adamcik.cz/electronics/let-me-introduce-you-sofle-keyboard-split-keyboard-based-on-lily58.html)
+
+The current (temporary) build guide and a build log is available here: [SofleKeyboard build log/guide](https://josef-adamcik.cz/electronics/soflekeyboard-build-log-and-build-guide.html)
+
+* Keyboard Maintainer: [Josef Adamcik](https://josef-adamcik.cz) [Twitter:@josefadamcik](https://twitter.com/josefadamcik)  
+* Hardware Supported: SofleKeyboard PCB, ProMicro  
+* Hardware Availability: [PCB & Case Data](https://github.com/josefadamcik/SofleKeyboard)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make sofle:default
+
+Flashing example for this keyboard:
+
+    make sofle:default:flash
+
+Press reset button on he keyboard when asked.
+
+Disconnect the first half, connect the second one and repeat the process.
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
diff --git a/keyboards/sofle/rev1/rev1.c b/keyboards/sofle/rev1/rev1.c
index bbb014c4d..88a28e6a4 100644
--- a/keyboards/sofle/rev1/rev1.c
+++ b/keyboards/sofle/rev1/rev1.c
@@ -1 +1,87 @@
+/* Copyright 2021 Carlos Martins
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include "sofle.h"
+
+#ifdef RGB_MATRIX_ENABLE
+  // Physical Layout
+  // Columns
+  // 0  1  2  3  4  5  6  7  8  9  10 11 12 13
+  //                                           ROWS
+  // 12 13 22 23 32 33       33 32 23 22 13 12  0
+  //    02    03    04       04    03    02
+  // 11 14 21 24 31 34       34 31 24 21 14 11  1
+  //                01       01
+  // 10 15 20 25 30 35       35 30 25 20 15 10  2
+  //
+  // 09 16 19 26 29 36       36 29 26 19 16 09  3
+  //
+  //     08 17 18 27 28     28 27 18 17 08      4
+  //    07    06    05       05    06    07
+
+led_config_t g_led_config = {
+    {
+        {  11,  12,  21,  22,  31,  32 },
+        {  10,  13,  20,  23,  30,  33 },
+        {  9,   14,  19,  24,  29,  34},
+        {  8,   15,  18,  25,  28,  35},
+        {  7,   16,  17,  26,  27,  NO_LED },
+        {  47,  48,  57,  58,  67,  68},
+        {  46,  49,  56,  59,  66,  69},
+        {  45,  50,  55,  60,  65,  70},
+        {  44,  51,  54,  61,  64,  71},
+        {  43,  52,  53,  62,  63,  NO_LED }
+    },
+    {
+       // Left side underglow
+        {96, 40}, {16, 20}, {48, 10}, {80, 18}, {88, 60}, {56, 57}, {24,60},
+        // Left side Matrix
+        {32, 57}, { 0, 48}, { 0, 36}, { 0, 24}, { 0, 12},
+        {16, 12}, {16, 24}, {16, 36}, {16, 48}, {48, 55},
+        {64, 57}, {32, 45}, {32, 33}, {32, 21}, {32,  9},
+        {48,  7}, {48, 19}, {48, 31}, {48, 43}, {80, 59},
+        {96, 64}, {64, 45}, {64, 33}, {64, 21}, {64,  9},
+        {80, 10}, {80, 22}, {80, 34}, {80, 47},
+
+
+        // Right side underglow
+        {128, 40}, {208, 20}, {176, 10}, {144, 18}, {136, 60}, {168, 57}, {200,60},
+        // Right side Matrix
+        {192, 57}, {224, 48}, {224, 36}, {224, 24}, {224, 12},
+        {208, 12}, {208, 24}, {208, 36}, {208, 48}, {176, 55},
+        {160, 57}, {192, 45}, {192, 33}, {192, 21}, {192,  9},
+        {176,  7}, {176, 19}, {176, 31}, {176, 43}, {144, 59},
+        {128, 64}, {160, 45}, {160, 33}, {160, 21}, {160,  9},
+        {144, 10}, {144, 22}, {144, 34}, {144, 47},
+    },
+    {
+        LED_FLAG_NONE, LED_FLAG_UNDERGLOW, LED_FLAG_UNDERGLOW, LED_FLAG_UNDERGLOW, LED_FLAG_UNDERGLOW, LED_FLAG_UNDERGLOW, LED_FLAG_UNDERGLOW,
+        LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+        LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+        LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+        LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+        LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+        LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+        LED_FLAG_NONE, LED_FLAG_UNDERGLOW, LED_FLAG_UNDERGLOW, LED_FLAG_UNDERGLOW, LED_FLAG_UNDERGLOW, LED_FLAG_UNDERGLOW, LED_FLAG_UNDERGLOW,
+        LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+        LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+        LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+        LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+        LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+        LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT
+    }
+};
+#endif
diff --git a/keyboards/terrazzo/config.h b/keyboards/terrazzo/config.h
index 985110d16..907c94ff5 100644
--- a/keyboards/terrazzo/config.h
+++ b/keyboards/terrazzo/config.h
@@ -83,13 +83,13 @@ so there is only one configuration. */
 
 #ifdef LED_MATRIX_ENABLE
 
-#define LED_DRIVER_ADDR_1 0x74 
+#define LED_DRIVER_ADDR_1 0x74
 #define LED_DRIVER_COUNT 1
 #define DRIVER_LED_TOTAL 105
 #define LED_MATRIX_ROWS 15
 #define LED_MATRIX_COLS 7
 #define LED_MATRIX_MAXIMUM_BRIGHTNESS 20
-#define LED_DISABLE_WHEN_USB_SUSPENDED true
+#define LED_DISABLE_WHEN_USB_SUSPENDED
 
 #define DISABLE_LED_MATRIX_ALPHAS_MODS
 #define DISABLE_LED_MATRIX_BREATHING
diff --git a/keyboards/tkc/portico/config.h b/keyboards/tkc/portico/config.h
index 4a7da833f..ef6e46658 100644
--- a/keyboards/tkc/portico/config.h
+++ b/keyboards/tkc/portico/config.h
@@ -45,7 +45,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #    define RGB_MATRIX_LED_FLUSH_LIMIT 26
 #    define DEBOUNCE 3
 #    define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #    define RGB_MATRIX_KEYPRESSES
 #    define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
 #    define DISABLE_RGB_MATRIX_BAND_SAT
diff --git a/keyboards/tokyo60/config.h b/keyboards/tokyokeyboard/tokyo60/config.h
index 03dee74e9..03dee74e9 100644
--- a/keyboards/tokyo60/config.h
+++ b/keyboards/tokyokeyboard/tokyo60/config.h
diff --git a/keyboards/tokyo60/info.json b/keyboards/tokyokeyboard/tokyo60/info.json
index 10d1bf093..10d1bf093 100644
--- a/keyboards/tokyo60/info.json
+++ b/keyboards/tokyokeyboard/tokyo60/info.json
diff --git a/keyboards/tokyo60/keymaps/default/config.h b/keyboards/tokyokeyboard/tokyo60/keymaps/default/config.h
index 271f48d00..271f48d00 100644
--- a/keyboards/tokyo60/keymaps/default/config.h
+++ b/keyboards/tokyokeyboard/tokyo60/keymaps/default/config.h
diff --git a/keyboards/tokyo60/keymaps/default/keymap.c b/keyboards/tokyokeyboard/tokyo60/keymaps/default/keymap.c
index 9139d15bc..9139d15bc 100644
--- a/keyboards/tokyo60/keymaps/default/keymap.c
+++ b/keyboards/tokyokeyboard/tokyo60/keymaps/default/keymap.c
diff --git a/keyboards/tokyo60/keymaps/swappedBottomRow/config.h b/keyboards/tokyokeyboard/tokyo60/keymaps/swappedBottomRow/config.h
index 271f48d00..271f48d00 100644
--- a/keyboards/tokyo60/keymaps/swappedBottomRow/config.h
+++ b/keyboards/tokyokeyboard/tokyo60/keymaps/swappedBottomRow/config.h
diff --git a/keyboards/tokyo60/keymaps/swappedBottomRow/keymap.c b/keyboards/tokyokeyboard/tokyo60/keymaps/swappedBottomRow/keymap.c
index 54b68f582..54b68f582 100644
--- a/keyboards/tokyo60/keymaps/swappedBottomRow/keymap.c
+++ b/keyboards/tokyokeyboard/tokyo60/keymaps/swappedBottomRow/keymap.c
diff --git a/keyboards/tokyo60/keymaps/via/keymap.c b/keyboards/tokyokeyboard/tokyo60/keymaps/via/keymap.c
index ffef9af79..ffef9af79 100644
--- a/keyboards/tokyo60/keymaps/via/keymap.c
+++ b/keyboards/tokyokeyboard/tokyo60/keymaps/via/keymap.c
diff --git a/keyboards/tokyo60/keymaps/via/rules.mk b/keyboards/tokyokeyboard/tokyo60/keymaps/via/rules.mk
index 1e5b99807..1e5b99807 100644
--- a/keyboards/tokyo60/keymaps/via/rules.mk
+++ b/keyboards/tokyokeyboard/tokyo60/keymaps/via/rules.mk
diff --git a/keyboards/tokyo60/readme.md b/keyboards/tokyokeyboard/tokyo60/readme.md
index 11d4d353c..4d4f53ef0 100644
--- a/keyboards/tokyo60/readme.md
+++ b/keyboards/tokyokeyboard/tokyo60/readme.md
@@ -1,15 +1,15 @@
 # Tokyo60
 
-![Tokyo60](http://tokyokeyboard.com/wp-content/uploads/2018/02/AI7B4543_copy_page_20180215141449-1200x800.jpg)
+![Tokyo60](https://i2.wp.com/tokyokeyboard.com/wp-content/uploads/2018/02/AI7B4543_copy_page_20180215141449-1200x800.jpg)
 
 Minimal hacker style mechanical keyboard designed in Tokyo. Full aluminum hi-pro construction with integrated top-plate. Cherry MX compatible. More Info at [Tokyo Keyboard](http://tokyokeyboard.com).
 
-* Keyboard Maintainer: [Tokyo Keyboard](http://tokyokeyboard.com)
-* Hardware Supported: Tokyo60 Rev.1
+* Keyboard Maintainer: [Tokyo Keyboard](https://tokyokeyboard.com)
+* Hardware Supported: Tokyo60 Rev.1 - 4
 * Hardware Availability: [Drop](https://drop.com/buy/massdrop-x-tokyo-keyboard-tokyo60-keyboard-kit?mode=guest_open)
 
 Make example for this keyboard (after setting up your build environment):
 
-    make tokyo60:default
+    make tokyokeyboard/tokyo60:default
 
 See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
diff --git a/keyboards/tokyo60/rules.mk b/keyboards/tokyokeyboard/tokyo60/rules.mk
index fa639b1ca..fa639b1ca 100644
--- a/keyboards/tokyo60/rules.mk
+++ b/keyboards/tokyokeyboard/tokyo60/rules.mk
diff --git a/keyboards/tokyo60/tokyo60.c b/keyboards/tokyokeyboard/tokyo60/tokyo60.c
index 2126bb612..2126bb612 100644
--- a/keyboards/tokyo60/tokyo60.c
+++ b/keyboards/tokyokeyboard/tokyo60/tokyo60.c
diff --git a/keyboards/tokyo60/tokyo60.h b/keyboards/tokyokeyboard/tokyo60/tokyo60.h
index 9eb5f3e62..9eb5f3e62 100644
--- a/keyboards/tokyo60/tokyo60.h
+++ b/keyboards/tokyokeyboard/tokyo60/tokyo60.h
diff --git a/keyboards/whitefox/config.h b/keyboards/whitefox/config.h
index 4d7a460d2..1cdac01d0 100644
--- a/keyboards/whitefox/config.h
+++ b/keyboards/whitefox/config.h
@@ -62,6 +62,20 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define LED_BRIGHTNESS_LO 100
 #define LED_BRIGHTNESS_HI 255
 
+/* LED matrix driver */
+#define LED_DRIVER_ADDR_1 0x74
+#define LED_DRIVER_COUNT 1
+#define DRIVER_LED_TOTAL 71
+#define LED_DISABLE_WHEN_USB_SUSPENDED
+
+/* i2c (for LED matrix) */
+#define I2C1_CLOCK_SPEED 400000
+#define I2C1_SCL_PAL_MODE PAL_MODE_ALTERNATIVE_2
+#define I2C1_SDA_PAL_MODE PAL_MODE_ALTERNATIVE_2
+#define I2C1_BANK GPIOB
+#define I2C1_SCL 0
+#define I2C1_SDA 1
+
 /* If defined, GRAVE_ESC will always act as ESC when CTRL is held.
  * This is useful for the Windows task manager shortcut (ctrl+shift+esc).
  */
diff --git a/keyboards/whitefox/rules.mk b/keyboards/whitefox/rules.mk
index 771804369..7c1d0c3de 100644
--- a/keyboards/whitefox/rules.mk
+++ b/keyboards/whitefox/rules.mk
@@ -25,16 +25,12 @@ COMMAND_ENABLE = yes        # Commands for debug and configuration
 SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
 # if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 NKRO_ENABLE = yes           # USB Nkey Rollover
-BACKLIGHT_ENABLE = yes      # Enable keyboard backlight functionality
 RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
 BLUETOOTH_ENABLE = no       # Enable Bluetooth
 AUDIO_ENABLE = no           # Audio output
-BACKLIGHT_DRIVER = custom
-VISUALIZER_ENABLE = yes
 
-LED_DRIVER = is31fl3731c
-LED_WIDTH = 16
-LED_HEIGHT = 5
+LED_MATRIX_ENABLE = yes
+LED_MATRIX_DRIVER = IS31FL3731
 
 LAYOUTS = 65_ansi 65_ansi_blocker 65_ansi_blocker_split_bs 65_iso 65_iso_blocker 65_iso_blocker_split_bs
 
diff --git a/keyboards/whitefox/whitefox.c b/keyboards/whitefox/whitefox.c
index ea083c6e0..f10f0fd5c 100644
--- a/keyboards/whitefox/whitefox.c
+++ b/keyboards/whitefox/whitefox.c
@@ -16,3 +16,79 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "whitefox.h"
+
+#ifdef LED_MATRIX_ENABLE
+const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
+// The numbers in the comments are the led numbers DXX on the PCB
+/* Refer to IS31 manual for these locations
+ *  driver
+ *  |   LED address
+ *  |   | */
+//     1            2            3            4            5            6            7            8            9            10           11           12           13           14           15           16
+  { 0, C1_1 }, { 0, C1_2 }, { 0, C1_3 }, { 0, C1_4 }, { 0, C1_5 }, { 0, C1_6 }, { 0, C1_7 }, { 0, C1_8 }, { 0, C2_1 }, { 0, C2_2 }, { 0, C2_3 }, { 0, C2_4 }, { 0, C2_5 }, { 0, C2_6 }, { 0, C2_7 }, { 0, C2_8 },
+//     17           18           19           20           21           22           23           24           25           26           27           28           29           30           31
+  { 0, C3_1 }, { 0, C3_2 }, { 0, C3_3 }, { 0, C3_4 }, { 0, C3_5 }, { 0, C3_6 }, { 0, C3_7 }, { 0, C3_8 }, { 0, C4_1 }, { 0, C4_2 }, { 0, C4_3 }, { 0, C4_4 }, { 0, C4_5 }, { 0, C4_6 }, { 0, C4_7 },
+//     32           33           34           35           36           37           38           39           40           41           42           43           44           45           46
+  { 0, C4_8 }, { 0, C5_1 }, { 0, C5_2 }, { 0, C5_3 }, { 0, C5_4 }, { 0, C5_5 }, { 0, C5_6 }, { 0, C5_7 }, { 0, C5_8 }, { 0, C6_1 }, { 0, C6_2 }, { 0, C6_3 }, { 0, C6_4 }, { 0, C6_5 }, { 0, C6_6 },
+//     47           48           49           50           51           52           53           54           55           56           57           58           59           60           61
+  { 0, C6_7 }, { 0, C6_8 }, { 0, C7_1 }, { 0, C7_2 }, { 0, C7_3 }, { 0, C7_4 }, { 0, C7_5 }, { 0, C7_6 }, { 0, C7_7 }, { 0, C7_8 }, { 0, C8_1 }, { 0, C8_2 }, { 0, C8_3 }, { 0, C8_4 }, { 0, C8_5 },
+//     62           63           64                                                  65                                     66           67           68           69           70           71
+  { 0, C8_6 }, { 0, C8_7 }, { 0, C8_8 },                                        { 0, C9_1 },                           { 0, C9_2 }, { 0, C9_3 }, { 0, C9_4 }, { 0, C9_5 }, { 0, C9_6 }, { 0, C9_7 },
+};
+
+led_config_t g_led_config = {
+    {
+      // Key Matrix to LED Index
+      {      0,      1,      2,      3,      4,      5,      6,      7,      8 },
+      {      9,     10,     11,     12,     13,     14,     15,     16,     17 },
+      {     18,     19,     20,     21,     22,     23,     24,     25,     26 },
+      {     27,     28,     29,     30,     31,     32,     33,     34,     35 },
+      {     36,     37,     38,     39,     40,     41,     42,     43,     44 },
+      {     45,     46,     47,     48,     49,     50,     51,     52,     53 },
+      {     54,     55,     56,     57,     58,     59,     60,     61,     62 },
+      {     63,     64,     65,     66,     67,     68,     69,     70, NO_LED },
+    }, {
+      // LED Index to Physical Position
+      {   0,  0 }, {  15,  0 }, {  30,  0 }, {  45,  0 }, {  60,  0 }, {  75,  0 }, {  90,  0 }, { 105,  0 }, { 119,  0 }, { 134,  0 }, { 149,  0 }, { 164,  0 }, { 179,  0 }, { 194,  0 }, { 209,  0 }, { 224,  0 },
+      {   4, 16 }, {  22, 16 }, {  37, 16 }, {  52, 16 }, {  67, 16 }, {  82, 16 }, {  97, 16 }, { 112, 16 }, { 127, 16 }, { 142, 16 }, { 157, 16 }, { 172, 16 }, { 187, 16 }, { 205, 16 }, { 224, 16 },
+      {   6, 32 }, {  26, 32 }, {  41, 32 }, {  56, 32 }, {  71, 32 }, {  86, 32 }, { 101, 32 }, { 116, 32 }, { 131, 32 }, { 146, 32 }, { 161, 32 }, { 175, 32 }, { 190, 32 }, { 207, 32 }, { 224, 32 },
+      {   2, 48 }, {  19, 48 }, {  34, 48 }, {  49, 48 }, {  63, 48 }, {  78, 48 }, {  93, 48 }, { 108, 48 }, { 123, 48 }, { 138, 48 }, { 153, 48 }, { 168, 48 }, { 189, 48 }, { 209, 48 }, { 224, 48 },
+      {   2, 64 }, {  21, 64 }, {  39, 64 },                                        {  95, 64 },                           { 149, 64 }, { 164, 64 }, { 179, 64 }, { 194, 64 }, { 209, 64 }, { 224, 64 }
+    }, {
+      // LED Index to Flag
+      1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1,
+      1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1,
+      1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1,
+      1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1,
+      1, 1, 1,          1,       1, 1, 1, 1, 1, 1,
+    }
+};
+#endif
+
+void keyboard_pre_init_kb(void) {
+#ifdef LED_MATRIX_ENABLE
+    // Turn on LED controller
+    setPinOutput(B16);
+    writePinHigh(B16);
+#endif
+    keyboard_pre_init_user();
+}
+
+void matrix_init_kb(void) {
+    // put your keyboard start-up code here
+    // runs once when the firmware starts up
+
+#ifdef LED_MATRIX_ENABLE
+    /*
+     * Since K20x is stuck with a 32 byte EEPROM (see tmk_core/common/chibios/eeprom_teensy.c),
+     * and neither led_matrix_eeconfig.speed or .flags fit in this boundary, just force their values to default on boot.
+     */
+#    if !defined(LED_MATRIX_STARTUP_SPD)
+#        define LED_MATRIX_STARTUP_SPD UINT8_MAX / 2
+#    endif
+    led_matrix_set_speed(LED_MATRIX_STARTUP_SPD),
+    led_matrix_set_flags(LED_FLAG_ALL);
+#endif
+
+    matrix_init_user();
+}
diff --git a/keyboards/xbows/nature/config.h b/keyboards/xbows/nature/config.h
index c1ff79335..e321f7ee1 100644
--- a/keyboards/xbows/nature/config.h
+++ b/keyboards/xbows/nature/config.h
@@ -35,7 +35,7 @@
 #    define RGB_MATRIX_LED_PROCESS_LIMIT 18
 #    define RGB_MATRIX_LED_FLUSH_LIMIT 16
 #    define RGB_DISABLE_AFTER_TIMEOUT 0          // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true  // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED  // turn off effects when suspended
 #    define RGB_MATRIX_KEYPRESSES
 #    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 200
 #    define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
diff --git a/keyboards/xbows/woody/config.h b/keyboards/xbows/woody/config.h
index 7f396d000..ea27508da 100644
--- a/keyboards/xbows/woody/config.h
+++ b/keyboards/xbows/woody/config.h
@@ -16,10 +16,10 @@
 #define RGB_MATRIX_LED_FLUSH_LIMIT 26
 #define DEBOUNCE 3
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+#define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
 #define RGB_MATRIX_KEYPRESSES
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 200
-#define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN     
+#define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
 #define DISABLE_RGB_MATRIX_BAND_SAT
 #define DISABLE_RGB_MATRIX_BAND_PINWHEEL_SAT
 #define DISABLE_RGB_MATRIX_BAND_SPIRAL_SAT
@@ -40,4 +40,4 @@
 #define DRIVER_1_LED_TOTAL 35
 #define DRIVER_2_LED_TOTAL 32
 #define DRIVER_LED_TOTAL (DRIVER_1_LED_TOTAL + DRIVER_2_LED_TOTAL)
-#endif
\ No newline at end of file
+#endif
diff --git a/keyboards/yncognito/batpad/config.h b/keyboards/yncognito/batpad/config.h
index 02c84a514..7ca4072e0 100644
--- a/keyboards/yncognito/batpad/config.h
+++ b/keyboards/yncognito/batpad/config.h
@@ -47,13 +47,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define RGB_DI_PIN B5
 #define DRIVER_LED_TOTAL 8
-#define RGB_MATRIX_KEYPRESSES 
-#define RGB_MATRIX_KEYRELEASES 
+#define RGB_MATRIX_KEYPRESSES
+#define RGB_MATRIX_KEYRELEASES
 #define RGB_MATRIX_FRAMEBUFFER_EFFECTS
-#define RGB_DISABLE_AFTER_TIMEOUT 0 
-#define RGB_DISABLE_WHEN_USB_SUSPENDED false 
-#define RGB_MATRIX_LED_FLUSH_LIMIT 16 
-#define RGB_MATRIX_MAXIMUM_BRIGHTNESS 255 
+#define RGB_DISABLE_AFTER_TIMEOUT 0
+// #define RGB_DISABLE_WHEN_USB_SUSPENDED
+#define RGB_MATRIX_LED_FLUSH_LIMIT 16
+#define RGB_MATRIX_MAXIMUM_BRIGHTNESS 255
 #define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_ALL
-
-        
diff --git a/layouts/community/ergodox/drashna/config.h b/layouts/community/ergodox/drashna/config.h
index 4ccba8f04..f9daf277f 100644
--- a/layouts/community/ergodox/drashna/config.h
+++ b/layouts/community/ergodox/drashna/config.h
@@ -47,3 +47,4 @@
 
 #define PIMORONI_TRACKBALL_INVERT_X
 #define PIMORONI_TRACKBALL_INVERT_Y
+#define PIMORONI_TRACKBALL_CLICK
diff --git a/layouts/community/ortho_4x12/bocaj/config.h b/layouts/community/ortho_4x12/bocaj/config.h
index 9a65684f3..c9d297f92 100644
--- a/layouts/community/ortho_4x12/bocaj/config.h
+++ b/layouts/community/ortho_4x12/bocaj/config.h
@@ -24,7 +24,7 @@
 #    define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 // #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
 // #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 200 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true  // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED  // turn off effects when suspended
 #    undef RGB_MATRIX_LED_PROCESS_LIMIT
 #    undef RGB_MATRIX_LED_FLUSH_LIMIT
 #endif
diff --git a/layouts/community/ortho_4x12/drashna/config.h b/layouts/community/ortho_4x12/drashna/config.h
index f4abd64f5..43143c3a3 100644
--- a/layouts/community/ortho_4x12/drashna/config.h
+++ b/layouts/community/ortho_4x12/drashna/config.h
@@ -37,7 +37,7 @@
 #    define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 // #define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
 // #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 200 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true  // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED  // turn off effects when suspended
 #    undef RGB_MATRIX_LED_PROCESS_LIMIT
 #    undef RGB_MATRIX_LED_FLUSH_LIMIT
 #    ifdef KEYBOARD_planck_rev6
diff --git a/layouts/community/split_3x6_3/drashna/config.h b/layouts/community/split_3x6_3/drashna/config.h
index dd950ce7b..cc53d4c36 100644
--- a/layouts/community/split_3x6_3/drashna/config.h
+++ b/layouts/community/split_3x6_3/drashna/config.h
@@ -47,7 +47,7 @@
 #    define RGB_MATRIX_KEYPRESSES  // reacts to keypresses
 // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true  // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED  // turn off effects when suspended
 // #   define RGB_MATRIX_LED_PROCESS_LIMIT (DRIVER_LED_TOTAL + 4) / 5 // limits the number of LEDs to process in an animation per task run (increases keyboard responsiveness)
 // #   define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 #    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 120  // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
diff --git a/lib/chibios b/lib/chibios
-Subproject ffe54d63cb10a355add318f8e922e39f1c3d4bf
+Subproject 413e39c5681d181720440f2a8b7391f581788d7
diff --git a/lib/chibios-contrib b/lib/chibios-contrib
-Subproject 61baa6b036138c155f7cfc5646d833d9423f324
+Subproject 9c2bfa6aeba993345f5425d82807c101f8e25e6
diff --git a/lib/python/qmk/cli/doctor/__init__.py b/lib/python/qmk/cli/doctor/__init__.py
new file mode 100755
index 000000000..272e04202
--- /dev/null
+++ b/lib/python/qmk/cli/doctor/__init__.py
@@ -0,0 +1,5 @@
+"""QMK Doctor
+
+Check out the user's QMK environment and make sure it's ready to compile.
+"""
+from .main import doctor
diff --git a/lib/python/qmk/os_helpers/__init__.py b/lib/python/qmk/cli/doctor/check.py
index 3e98db3c3..a0bbb2816 100644
--- a/lib/python/qmk/os_helpers/__init__.py
+++ b/lib/python/qmk/cli/doctor/check.py
@@ -1,4 +1,4 @@
-"""OS-agnostic helper functions
+"""Check for specific programs.
 """
 from enum import Enum
 import re
@@ -30,7 +30,7 @@ ESSENTIAL_BINARIES = {
 }
 
 
-def parse_gcc_version(version):
+def _parse_gcc_version(version):
     m = re.match(r"(\d+)(?:\.(\d+))?(?:\.(\d+))?", version)
 
     return {
@@ -40,7 +40,7 @@ def parse_gcc_version(version):
     }
 
 
-def check_arm_gcc_version():
+def _check_arm_gcc_version():
     """Returns True if the arm-none-eabi-gcc version is not known to cause problems.
     """
     if 'output' in ESSENTIAL_BINARIES['arm-none-eabi-gcc']:
@@ -50,7 +50,7 @@ def check_arm_gcc_version():
     return CheckStatus.OK  # Right now all known arm versions are ok
 
 
-def check_avr_gcc_version():
+def _check_avr_gcc_version():
     """Returns True if the avr-gcc version is not known to cause problems.
     """
     rc = CheckStatus.ERROR
@@ -60,7 +60,7 @@ def check_avr_gcc_version():
         cli.log.info('Found avr-gcc version %s', version_number)
         rc = CheckStatus.OK
 
-        parsed_version = parse_gcc_version(version_number)
+        parsed_version = _parse_gcc_version(version_number)
         if parsed_version['major'] > 8:
             cli.log.warning('{fg_yellow}We do not recommend avr-gcc newer than 8. Downgrading to 8.x is recommended.')
             rc = CheckStatus.WARNING
@@ -68,7 +68,7 @@ def check_avr_gcc_version():
     return rc
 
 
-def check_avrdude_version():
+def _check_avrdude_version():
     if 'output' in ESSENTIAL_BINARIES['avrdude']:
         last_line = ESSENTIAL_BINARIES['avrdude']['output'].split('\n')[-2]
         version_number = last_line.split()[2][:-1]
@@ -77,7 +77,7 @@ def check_avrdude_version():
     return CheckStatus.OK
 
 
-def check_dfu_util_version():
+def _check_dfu_util_version():
     if 'output' in ESSENTIAL_BINARIES['dfu-util']:
         first_line = ESSENTIAL_BINARIES['dfu-util']['output'].split('\n')[0]
         version_number = first_line.split()[1]
@@ -86,7 +86,7 @@ def check_dfu_util_version():
     return CheckStatus.OK
 
 
-def check_dfu_programmer_version():
+def _check_dfu_programmer_version():
     if 'output' in ESSENTIAL_BINARIES['dfu-programmer']:
         first_line = ESSENTIAL_BINARIES['dfu-programmer']['output'].split('\n')[0]
         version_number = first_line.split()[1]
@@ -111,7 +111,7 @@ def check_binary_versions():
     """Check the versions of ESSENTIAL_BINARIES
     """
     versions = []
-    for check in (check_arm_gcc_version, check_avr_gcc_version, check_avrdude_version, check_dfu_util_version, check_dfu_programmer_version):
+    for check in (_check_arm_gcc_version, _check_avr_gcc_version, _check_avrdude_version, _check_dfu_util_version, _check_dfu_programmer_version):
         versions.append(check())
     return versions
 
diff --git a/lib/python/qmk/os_helpers/linux/__init__.py b/lib/python/qmk/cli/doctor/linux.py
index 008654ab0..c0b77216a 100644
--- a/lib/python/qmk/os_helpers/linux/__init__.py
+++ b/lib/python/qmk/cli/doctor/linux.py
@@ -1,11 +1,13 @@
 """OS-specific functions for: Linux
 """
-from pathlib import Path
+import platform
 import shutil
+from pathlib import Path
 
 from milc import cli
+
 from qmk.constants import QMK_FIRMWARE
-from qmk.os_helpers import CheckStatus
+from .check import CheckStatus
 
 
 def _udev_rule(vid, pid=None, *args):
@@ -138,3 +140,23 @@ def check_modem_manager():
         """(TODO): Add check for non-systemd systems
         """
     return False
+
+
+def os_test_linux():
+    """Run the Linux specific tests.
+    """
+    # Don't bother with udev on WSL, for now
+    if 'microsoft' in platform.uname().release.lower():
+        cli.log.info("Detected {fg_cyan}Linux (WSL){fg_reset}.")
+
+        # https://github.com/microsoft/WSL/issues/4197
+        if QMK_FIRMWARE.as_posix().startswith("/mnt"):
+            cli.log.warning("I/O performance on /mnt may be extremely slow.")
+            return CheckStatus.WARNING
+
+        return CheckStatus.OK
+    else:
+        cli.log.info("Detected {fg_cyan}Linux{fg_reset}.")
+        from .linux import check_udev_rules
+
+        return check_udev_rules()
diff --git a/lib/python/qmk/cli/doctor/macos.py b/lib/python/qmk/cli/doctor/macos.py
new file mode 100644
index 000000000..00fb27285
--- /dev/null
+++ b/lib/python/qmk/cli/doctor/macos.py
@@ -0,0 +1,13 @@
+import platform
+
+from milc import cli
+
+from .check import CheckStatus
+
+
+def os_test_macos():
+    """Run the Mac specific tests.
+    """
+    cli.log.info("Detected {fg_cyan}macOS %s{fg_reset}.", platform.mac_ver()[0])
+
+    return CheckStatus.OK
diff --git a/lib/python/qmk/cli/doctor.py b/lib/python/qmk/cli/doctor/main.py
index 9e1057062..45b0203b6 100755
--- a/lib/python/qmk/cli/doctor.py
+++ b/lib/python/qmk/cli/doctor/main.py
@@ -7,9 +7,10 @@ from subprocess import DEVNULL
 
 from milc import cli
 from milc.questions import yesno
+
 from qmk import submodules
 from qmk.constants import QMK_FIRMWARE
-from qmk.os_helpers import CheckStatus, check_binaries, check_binary_versions, check_submodules, check_git_repo
+from .check import CheckStatus, check_binaries, check_binary_versions, check_submodules, check_git_repo
 
 
 def os_tests():
@@ -18,53 +19,19 @@ def os_tests():
     platform_id = platform.platform().lower()
 
     if 'darwin' in platform_id or 'macos' in platform_id:
+        from .macos import os_test_macos
         return os_test_macos()
     elif 'linux' in platform_id:
+        from .linux import os_test_linux
         return os_test_linux()
     elif 'windows' in platform_id:
+        from .windows import os_test_windows
         return os_test_windows()
     else:
         cli.log.warning('Unsupported OS detected: %s', platform_id)
         return CheckStatus.WARNING
 
 
-def os_test_linux():
-    """Run the Linux specific tests.
-    """
-    # Don't bother with udev on WSL, for now
-    if 'microsoft' in platform.uname().release.lower():
-        cli.log.info("Detected {fg_cyan}Linux (WSL){fg_reset}.")
-
-        # https://github.com/microsoft/WSL/issues/4197
-        if QMK_FIRMWARE.as_posix().startswith("/mnt"):
-            cli.log.warning("I/O performance on /mnt may be extremely slow.")
-            return CheckStatus.WARNING
-
-        return CheckStatus.OK
-    else:
-        cli.log.info("Detected {fg_cyan}Linux{fg_reset}.")
-        from qmk.os_helpers.linux import check_udev_rules
-
-        return check_udev_rules()
-
-
-def os_test_macos():
-    """Run the Mac specific tests.
-    """
-    cli.log.info("Detected {fg_cyan}macOS %s{fg_reset}.", platform.mac_ver()[0])
-
-    return CheckStatus.OK
-
-
-def os_test_windows():
-    """Run the Windows specific tests.
-    """
-    win32_ver = platform.win32_ver()
-    cli.log.info("Detected {fg_cyan}Windows %s (%s){fg_reset}.", win32_ver[0], win32_ver[1])
-
-    return CheckStatus.OK
-
-
 @cli.argument('-y', '--yes', action='store_true', arg_only=True, help='Answer yes to all questions.')
 @cli.argument('-n', '--no', action='store_true', arg_only=True, help='Answer no to all questions.')
 @cli.subcommand('Basic QMK environment checks')
diff --git a/lib/python/qmk/cli/doctor/windows.py b/lib/python/qmk/cli/doctor/windows.py
new file mode 100644
index 000000000..381ab36fd
--- /dev/null
+++ b/lib/python/qmk/cli/doctor/windows.py
@@ -0,0 +1,14 @@
+import platform
+
+from milc import cli
+
+from .check import CheckStatus
+
+
+def os_test_windows():
+    """Run the Windows specific tests.
+    """
+    win32_ver = platform.win32_ver()
+    cli.log.info("Detected {fg_cyan}Windows %s (%s){fg_reset}.", win32_ver[0], win32_ver[1])
+
+    return CheckStatus.OK
diff --git a/lib/python/qmk/cli/format/json.py b/lib/python/qmk/cli/format/json.py
index 1358c70e7..19d504491 100755
--- a/lib/python/qmk/cli/format/json.py
+++ b/lib/python/qmk/cli/format/json.py
@@ -8,7 +8,7 @@ from jsonschema import ValidationError
 from milc import cli
 
 from qmk.info import info_json
-from qmk.json_schema import json_load, keyboard_validate
+from qmk.json_schema import json_load, validate
 from qmk.json_encoders import InfoJSONEncoder, KeymapJSONEncoder
 from qmk.path import normpath
 
@@ -23,14 +23,13 @@ def format_json(cli):
 
     if cli.args.format == 'auto':
         try:
-            keyboard_validate(json_file)
+            validate(json_file, 'qmk.keyboard.v1')
             json_encoder = InfoJSONEncoder
 
         except ValidationError as e:
             cli.log.warning('File %s did not validate as a keyboard:\n\t%s', cli.args.json_file, e)
             cli.log.info('Treating %s as a keymap file.', cli.args.json_file)
             json_encoder = KeymapJSONEncoder
-
     elif cli.args.format == 'keyboard':
         json_encoder = InfoJSONEncoder
     elif cli.args.format == 'keymap':
diff --git a/lib/python/qmk/info.py b/lib/python/qmk/info.py
index 47c8bff7a..5525f0fe6 100644
--- a/lib/python/qmk/info.py
+++ b/lib/python/qmk/info.py
@@ -9,7 +9,7 @@ from milc import cli
 
 from qmk.constants import CHIBIOS_PROCESSORS, LUFA_PROCESSORS, VUSB_PROCESSORS
 from qmk.c_parse import find_layouts
-from qmk.json_schema import deep_update, json_load, keyboard_validate, keyboard_api_validate
+from qmk.json_schema import deep_update, json_load, validate
 from qmk.keyboard import config_h, rules_mk
 from qmk.keymap import list_keymaps
 from qmk.makefile import parse_rules_mk_file
@@ -66,7 +66,7 @@ def info_json(keyboard):
 
     # Validate against the jsonschema
     try:
-        keyboard_api_validate(info_data)
+        validate(info_data, 'qmk.api.keyboard.v1')
 
     except jsonschema.ValidationError as e:
         json_path = '.'.join([str(p) for p in e.absolute_path])
@@ -143,10 +143,7 @@ def _pin_name(pin):
     elif pin == 'NO_PIN':
         return None
 
-    elif pin[0] in 'ABCDEFGHIJK' and pin[1].isdigit():
-        return pin
-
-    raise ValueError(f'Invalid pin: {pin}')
+    return pin
 
 
 def _extract_pins(pins):
@@ -493,7 +490,7 @@ def merge_info_jsons(keyboard, info_data):
             continue
 
         try:
-            keyboard_validate(new_info_data)
+            validate(new_info_data, 'qmk.keyboard.v1')
         except jsonschema.ValidationError as e:
             json_path = '.'.join([str(p) for p in e.absolute_path])
             cli.log.error('Not including data from file: %s', info_file)
diff --git a/lib/python/qmk/json_schema.py b/lib/python/qmk/json_schema.py
index 077dfcaa9..3e5663a29 100644
--- a/lib/python/qmk/json_schema.py
+++ b/lib/python/qmk/json_schema.py
@@ -24,9 +24,10 @@ def json_load(json_file):
 
 def load_jsonschema(schema_name):
     """Read a jsonschema file from disk.
-
-    FIXME(skullydazed/anyone): Refactor to make this a public function.
     """
+    if Path(schema_name).exists():
+        return json_load(schema_name)
+
     schema_path = Path(f'data/schemas/{schema_name}.jsonschema')
 
     if not schema_path.exists():
@@ -35,28 +36,33 @@ def load_jsonschema(schema_name):
     return json_load(schema_path)
 
 
-def keyboard_validate(data):
-    """Validates data against the keyboard jsonschema.
+def create_validator(schema):
+    """Creates a validator for the given schema id.
     """
-    schema = load_jsonschema('keyboard')
-    validator = jsonschema.Draft7Validator(schema).validate
+    schema_store = {}
 
-    return validator(data)
+    for schema_file in Path('data/schemas').glob('*.jsonschema'):
+        schema_data = load_jsonschema(schema_file)
+        if not isinstance(schema_data, dict):
+            cli.log.debug('Skipping schema file %s', schema_file)
+            continue
+        schema_store[schema_data['$id']] = schema_data
+
+    resolver = jsonschema.RefResolver.from_schema(schema_store['qmk.keyboard.v1'], store=schema_store)
+
+    return jsonschema.Draft7Validator(schema_store[schema], resolver=resolver).validate
 
 
-def keyboard_api_validate(data):
-    """Validates data against the api_keyboard jsonschema.
+def validate(data, schema):
+    """Validates data against a schema.
     """
-    base = load_jsonschema('keyboard')
-    relative = load_jsonschema('api_keyboard')
-    resolver = jsonschema.RefResolver.from_schema(base)
-    validator = jsonschema.Draft7Validator(relative, resolver=resolver).validate
+    validator = create_validator(schema)
 
     return validator(data)
 
 
 def deep_update(origdict, newdict):
-    """Update a dictionary in place, recursing to do a deep copy.
+    """Update a dictionary in place, recursing to do a depth-first deep copy.
     """
     for key, value in newdict.items():
         if isinstance(value, Mapping):
diff --git a/platforms/chibios/IC_TEENSY_4_1/board/board.mk b/platforms/chibios/IC_TEENSY_4_1/board/board.mk
new file mode 100644
index 000000000..bc242ac3c
--- /dev/null
+++ b/platforms/chibios/IC_TEENSY_4_1/board/board.mk
@@ -0,0 +1 @@
+include $(CHIBIOS_CONTRIB)/os/hal/boards/PJRC_TEENSY_4_1/board.mk
diff --git a/platforms/chibios/IC_TEENSY_4_1/rules.mk b/platforms/chibios/IC_TEENSY_4_1/rules.mk
new file mode 100644
index 000000000..0c62d209c
--- /dev/null
+++ b/platforms/chibios/IC_TEENSY_4_1/rules.mk
@@ -0,0 +1 @@
+TEENSY_LOADER_CLI_MCU = imxrt1062
diff --git a/quantum/crc.c b/quantum/crc.c
new file mode 100644
index 000000000..0d8b9d601
--- /dev/null
+++ b/quantum/crc.c
@@ -0,0 +1,59 @@
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "crc.h"
+
+__attribute__((weak)) void crc_init(void){
+    /* Software implementation nothing todo here. */
+};
+
+#if defined(CRC8_USE_TABLE)
+/**
+ * Static table used for the table_driven implementation.
+ */
+static const crc_t crc_table[256] = {0x00, 0x07, 0x0e, 0x09, 0x1c, 0x1b, 0x12, 0x15, 0x38, 0x3f, 0x36, 0x31, 0x24, 0x23, 0x2a, 0x2d, 0x70, 0x77, 0x7e, 0x79, 0x6c, 0x6b, 0x62, 0x65, 0x48, 0x4f, 0x46, 0x41, 0x54, 0x53, 0x5a, 0x5d, 0xe0, 0xe7, 0xee, 0xe9, 0xfc, 0xfb, 0xf2, 0xf5, 0xd8, 0xdf, 0xd6, 0xd1, 0xc4, 0xc3, 0xca, 0xcd, 0x90, 0x97, 0x9e, 0x99, 0x8c, 0x8b, 0x82, 0x85, 0xa8, 0xaf, 0xa6, 0xa1, 0xb4, 0xb3, 0xba, 0xbd, 0xc7, 0xc0, 0xc9, 0xce, 0xdb, 0xdc, 0xd5, 0xd2, 0xff, 0xf8, 0xf1, 0xf6, 0xe3, 0xe4, 0xed, 0xea, 0xb7, 0xb0, 0xb9, 0xbe, 0xab, 0xac, 0xa5, 0xa2, 0x8f, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9d, 0x9a, 0x27, 0x20, 0x29, 0x2e, 0x3b, 0x3c, 0x35, 0x32, 0x1f, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0d, 0x0a, 0x57, 0x50, 0x59, 0x5e, 0x4b, 0x4c, 0x45, 0x42, 0x6f, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7d, 0x7a,
+                                     0x89, 0x8e, 0x87, 0x80, 0x95, 0x92, 0x9b, 0x9c, 0xb1, 0xb6, 0xbf, 0xb8, 0xad, 0xaa, 0xa3, 0xa4, 0xf9, 0xfe, 0xf7, 0xf0, 0xe5, 0xe2, 0xeb, 0xec, 0xc1, 0xc6, 0xcf, 0xc8, 0xdd, 0xda, 0xd3, 0xd4, 0x69, 0x6e, 0x67, 0x60, 0x75, 0x72, 0x7b, 0x7c, 0x51, 0x56, 0x5f, 0x58, 0x4d, 0x4a, 0x43, 0x44, 0x19, 0x1e, 0x17, 0x10, 0x05, 0x02, 0x0b, 0x0c, 0x21, 0x26, 0x2f, 0x28, 0x3d, 0x3a, 0x33, 0x34, 0x4e, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5c, 0x5b, 0x76, 0x71, 0x78, 0x7f, 0x6a, 0x6d, 0x64, 0x63, 0x3e, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2c, 0x2b, 0x06, 0x01, 0x08, 0x0f, 0x1a, 0x1d, 0x14, 0x13, 0xae, 0xa9, 0xa0, 0xa7, 0xb2, 0xb5, 0xbc, 0xbb, 0x96, 0x91, 0x98, 0x9f, 0x8a, 0x8d, 0x84, 0x83, 0xde, 0xd9, 0xd0, 0xd7, 0xc2, 0xc5, 0xcc, 0xcb, 0xe6, 0xe1, 0xe8, 0xef, 0xfa, 0xfd, 0xf4, 0xf3};
+
+__attribute__((weak)) uint8_t crc8(const void *data, size_t data_len) {
+    const uint8_t *d   = (const uint8_t *)data;
+    crc_t          crc = 0xff;
+    size_t         tbl_idx;
+
+    while (data_len--) {
+        tbl_idx = crc ^ *d;
+        crc     = crc_table[tbl_idx] & 0xff;
+        d++;
+    }
+    return crc & 0xff;
+}
+#else
+__attribute__((weak)) uint8_t crc8(const void *data, size_t data_len) {
+    const uint8_t *d   = (const uint8_t *)data;
+    crc_t          crc = 0xff;
+    size_t         i, j;
+
+    for (i = 0; i < data_len; i++) {
+        crc ^= d[i];
+        for (j = 0; j < 8; j++) {
+            if ((crc & 0x80) != 0)
+                crc = (crc_t)((crc << 1) ^ 0x31);
+            else
+                crc <<= 1;
+        }
+    }
+    return crc;
+}
+#endif
\ No newline at end of file
diff --git a/quantum/rgb.h b/quantum/crc.h
index 2602fc0b2..c17f5888e 100644
--- a/quantum/rgb.h
+++ b/quantum/crc.h
@@ -1,4 +1,4 @@
-/* Copyright 2017 Jack Humbert
+/* Copyright 2021 QMK
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,24 +16,29 @@
 
 #pragma once
 
-__attribute__((weak)) void rgblight_toggle(void){};
+#include "quantum.h"
 
-__attribute__((weak)) void rgblight_step(void){};
-
-__attribute__((weak)) void rgblight_step_reverse(void){};
-
-__attribute__((weak)) void rgblight_increase_hue(void){};
-
-__attribute__((weak)) void rgblight_decrease_hue(void){};
-
-__attribute__((weak)) void rgblight_increase_sat(void){};
-
-__attribute__((weak)) void rgblight_decrease_sat(void){};
-
-__attribute__((weak)) void rgblight_increase_val(void){};
-
-__attribute__((weak)) void rgblight_decrease_val(void){};
-
-__attribute__((weak)) void rgblight_increase_speed(void){};
+/**
+ * The type of the CRC values.
+ *
+ * This type must be big enough to contain at least 8 bits.
+ */
+#if defined(CRC8_OPTIMIZE_SPEED)
+typedef uint_fast8_t crc_t;
+#else
+typedef uint_least8_t crc_t;
+#endif
+
+/**
+ * Initialize crc subsystem.
+ */
+__attribute__((weak)) void crc_init(void);
 
-__attribute__((weak)) void rgblight_decrease_speed(void){};
+/**
+ * Generate CRC8 value from given data.
+ *
+ * \param[in] data     Pointer to a buffer of \a data_len bytes.
+ * \param[in] data_len Number of bytes in the \a data buffer.
+ * \return             The calculated crc value.
+ */
+__attribute__((weak)) uint8_t crc8(const void *data, size_t data_len);
\ No newline at end of file
diff --git a/quantum/debounce.h b/quantum/debounce.h
index 9ca05c682..504386828 100644
--- a/quantum/debounce.h
+++ b/quantum/debounce.h
@@ -9,3 +9,5 @@ void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool
 bool debounce_active(void);
 
 void debounce_init(uint8_t num_rows);
+
+void debounce_free(void);
diff --git a/quantum/debounce/asym_eager_defer_pk.c b/quantum/debounce/asym_eager_defer_pk.c
new file mode 100644
index 000000000..24380dc5e
--- /dev/null
+++ b/quantum/debounce/asym_eager_defer_pk.c
@@ -0,0 +1,171 @@
+/*
+ * Copyright 2017 Alex Ong <the.onga@gmail.com>
+ * Copyright 2020 Andrei Purdea <andrei@purdea.ro>
+ * Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+Basic symmetric per-key algorithm. Uses an 8-bit counter per key.
+When no state changes have occured for DEBOUNCE milliseconds, we push the state.
+*/
+
+#include "matrix.h"
+#include "timer.h"
+#include "quantum.h"
+#include <stdlib.h>
+
+#ifdef PROTOCOL_CHIBIOS
+#    if CH_CFG_USE_MEMCORE == FALSE
+#        error ChibiOS is configured without a memory allocator. Your keyboard may have set `#define CH_CFG_USE_MEMCORE FALSE`, which is incompatible with this debounce algorithm.
+#    endif
+#endif
+
+#ifndef DEBOUNCE
+#    define DEBOUNCE 5
+#endif
+
+// Maximum debounce: 127ms
+#if DEBOUNCE > 127
+#    undef DEBOUNCE
+#    define DEBOUNCE 127
+#endif
+
+#define ROW_SHIFTER ((matrix_row_t)1)
+
+typedef struct {
+    bool pressed : 1;
+    uint8_t time : 7;
+} debounce_counter_t;
+
+#if DEBOUNCE > 0
+static debounce_counter_t *debounce_counters;
+static fast_timer_t last_time;
+static bool counters_need_update;
+static bool matrix_need_update;
+
+#define DEBOUNCE_ELAPSED 0
+
+static void update_debounce_counters_and_transfer_if_expired(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t elapsed_time);
+static void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows);
+
+// we use num_rows rather than MATRIX_ROWS to support split keyboards
+void debounce_init(uint8_t num_rows) {
+    debounce_counters = malloc(num_rows * MATRIX_COLS * sizeof(debounce_counter_t));
+    int i = 0;
+    for (uint8_t r = 0; r < num_rows; r++) {
+        for (uint8_t c = 0; c < MATRIX_COLS; c++) {
+            debounce_counters[i++].time = DEBOUNCE_ELAPSED;
+        }
+    }
+}
+
+void debounce_free(void) {
+    free(debounce_counters);
+    debounce_counters = NULL;
+}
+
+void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
+    bool updated_last = false;
+
+    if (counters_need_update) {
+        fast_timer_t now = timer_read_fast();
+        fast_timer_t elapsed_time = TIMER_DIFF_FAST(now, last_time);
+
+        last_time = now;
+        updated_last = true;
+        if (elapsed_time > UINT8_MAX) {
+            elapsed_time = UINT8_MAX;
+        }
+
+        if (elapsed_time > 0) {
+            update_debounce_counters_and_transfer_if_expired(raw, cooked, num_rows, elapsed_time);
+        }
+    }
+
+    if (changed || matrix_need_update) {
+        if (!updated_last) {
+            last_time = timer_read_fast();
+        }
+
+        transfer_matrix_values(raw, cooked, num_rows);
+    }
+}
+
+static void update_debounce_counters_and_transfer_if_expired(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t elapsed_time) {
+    debounce_counter_t *debounce_pointer = debounce_counters;
+
+    counters_need_update = false;
+    matrix_need_update = false;
+
+    for (uint8_t row = 0; row < num_rows; row++) {
+        for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+            matrix_row_t col_mask = (ROW_SHIFTER << col);
+
+            if (debounce_pointer->time != DEBOUNCE_ELAPSED) {
+                if (debounce_pointer->time <= elapsed_time) {
+                    debounce_pointer->time = DEBOUNCE_ELAPSED;
+
+                    if (debounce_pointer->pressed) {
+                        // key-down: eager
+                        matrix_need_update = true;
+                    } else {
+                        // key-up: defer
+                        cooked[row] = (cooked[row] & ~col_mask) | (raw[row] & col_mask);
+                    }
+                } else {
+                    debounce_pointer->time -= elapsed_time;
+                    counters_need_update = true;
+                }
+            }
+            debounce_pointer++;
+        }
+    }
+}
+
+static void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows) {
+    debounce_counter_t *debounce_pointer = debounce_counters;
+
+    for (uint8_t row = 0; row < num_rows; row++) {
+        matrix_row_t delta = raw[row] ^ cooked[row];
+        for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+            matrix_row_t col_mask = (ROW_SHIFTER << col);
+
+            if (delta & col_mask) {
+                if (debounce_pointer->time == DEBOUNCE_ELAPSED) {
+                    debounce_pointer->pressed = (raw[row] & col_mask);
+                    debounce_pointer->time = DEBOUNCE;
+                    counters_need_update = true;
+
+                    if (debounce_pointer->pressed) {
+                        // key-down: eager
+                        cooked[row] ^= col_mask;
+                    }
+                }
+            } else if (debounce_pointer->time != DEBOUNCE_ELAPSED) {
+                if (!debounce_pointer->pressed) {
+                    // key-up: defer
+                    debounce_pointer->time = DEBOUNCE_ELAPSED;
+                }
+            }
+            debounce_pointer++;
+        }
+    }
+}
+
+bool debounce_active(void) { return true; }
+#else
+#    include "none.c"
+#endif
diff --git a/quantum/debounce/none.c b/quantum/debounce/none.c
new file mode 100644
index 000000000..b03892bc5
--- /dev/null
+++ b/quantum/debounce/none.c
@@ -0,0 +1,31 @@
+/* Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "matrix.h"
+#include "quantum.h"
+#include <stdlib.h>
+
+void debounce_init(uint8_t num_rows) {}
+
+void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
+    for (int i = 0; i < num_rows; i++) {
+        cooked[i] = raw[i];
+    }
+}
+
+bool debounce_active(void) { return false; }
+
+void debounce_free(void) {}
diff --git a/quantum/debounce/sym_defer_g.c b/quantum/debounce/sym_defer_g.c
index 3ed9055d2..fbefd55ed 100644
--- a/quantum/debounce/sym_defer_g.c
+++ b/quantum/debounce/sym_defer_g.c
@@ -1,5 +1,6 @@
 /*
 Copyright 2017 Alex Ong<the.onga@gmail.com>
+Copyright 2021 Simon Arlott
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 2 of the License, or
@@ -23,30 +24,29 @@ When no state changes have occured for DEBOUNCE milliseconds, we push the state.
 #    define DEBOUNCE 5
 #endif
 
-void        debounce_init(uint8_t num_rows) {}
+#if DEBOUNCE > 0
 static bool debouncing = false;
+static fast_timer_t debouncing_time;
 
-#if DEBOUNCE > 0
-static uint16_t debouncing_time;
-void            debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
+void debounce_init(uint8_t num_rows) {}
+
+void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
     if (changed) {
         debouncing      = true;
-        debouncing_time = timer_read();
+        debouncing_time = timer_read_fast();
     }
 
-    if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
+    if (debouncing && timer_elapsed_fast(debouncing_time) >= DEBOUNCE) {
         for (int i = 0; i < num_rows; i++) {
             cooked[i] = raw[i];
         }
         debouncing = false;
     }
 }
-#else  // no debouncing.
-void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
-    for (int i = 0; i < num_rows; i++) {
-        cooked[i] = raw[i];
-    }
-}
-#endif
 
 bool debounce_active(void) { return debouncing; }
+
+void debounce_free(void) {}
+#else  // no debouncing.
+#    include "none.c"
+#endif
diff --git a/quantum/debounce/sym_defer_pk.c b/quantum/debounce/sym_defer_pk.c
index 60513f98e..626a9be84 100644
--- a/quantum/debounce/sym_defer_pk.c
+++ b/quantum/debounce/sym_defer_pk.c
@@ -1,6 +1,7 @@
 /*
 Copyright 2017 Alex Ong<the.onga@gmail.com>
 Copyright 2020 Andrei Purdea<andrei@purdea.ro>
+Copyright 2021 Simon Arlott
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 2 of the License, or
@@ -33,28 +34,25 @@ When no state changes have occured for DEBOUNCE milliseconds, we push the state.
 #    define DEBOUNCE 5
 #endif
 
+// Maximum debounce: 255ms
+#if DEBOUNCE > UINT8_MAX
+#    undef DEBOUNCE
+#    define DEBOUNCE UINT8_MAX
+#endif
+
 #define ROW_SHIFTER ((matrix_row_t)1)
 
-#define debounce_counter_t uint8_t
+typedef uint8_t debounce_counter_t;
 
+#if DEBOUNCE > 0
 static debounce_counter_t *debounce_counters;
+static fast_timer_t        last_time;
 static bool                counters_need_update;
 
-#define DEBOUNCE_ELAPSED 251
-#define MAX_DEBOUNCE (DEBOUNCE_ELAPSED - 1)
-
-static uint8_t wrapping_timer_read(void) {
-    static uint16_t time        = 0;
-    static uint8_t  last_result = 0;
-    uint16_t        new_time    = timer_read();
-    uint16_t        diff        = new_time - time;
-    time                        = new_time;
-    last_result                 = (last_result + diff) % (MAX_DEBOUNCE + 1);
-    return last_result;
-}
+#define DEBOUNCE_ELAPSED 0
 
-void update_debounce_counters_and_transfer_if_expired(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time);
-void start_debounce_counters(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time);
+static void update_debounce_counters_and_transfer_if_expired(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t elapsed_time);
+static void start_debounce_counters(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows);
 
 // we use num_rows rather than MATRIX_ROWS to support split keyboards
 void debounce_init(uint8_t num_rows) {
@@ -67,27 +65,49 @@ void debounce_init(uint8_t num_rows) {
     }
 }
 
+void debounce_free(void) {
+    free(debounce_counters);
+    debounce_counters = NULL;
+}
+
 void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
-    uint8_t current_time = wrapping_timer_read();
+    bool updated_last = false;
+
     if (counters_need_update) {
-        update_debounce_counters_and_transfer_if_expired(raw, cooked, num_rows, current_time);
+        fast_timer_t now = timer_read_fast();
+        fast_timer_t elapsed_time = TIMER_DIFF_FAST(now, last_time);
+
+        last_time = now;
+        updated_last = true;
+        if (elapsed_time > UINT8_MAX) {
+            elapsed_time = UINT8_MAX;
+        }
+
+        if (elapsed_time > 0) {
+            update_debounce_counters_and_transfer_if_expired(raw, cooked, num_rows, elapsed_time);
+        }
     }
 
     if (changed) {
-        start_debounce_counters(raw, cooked, num_rows, current_time);
+        if (!updated_last) {
+            last_time = timer_read_fast();
+        }
+
+        start_debounce_counters(raw, cooked, num_rows);
     }
 }
 
-void update_debounce_counters_and_transfer_if_expired(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time) {
+static void update_debounce_counters_and_transfer_if_expired(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t elapsed_time) {
     counters_need_update                 = false;
     debounce_counter_t *debounce_pointer = debounce_counters;
     for (uint8_t row = 0; row < num_rows; row++) {
         for (uint8_t col = 0; col < MATRIX_COLS; col++) {
             if (*debounce_pointer != DEBOUNCE_ELAPSED) {
-                if (TIMER_DIFF(current_time, *debounce_pointer, MAX_DEBOUNCE) >= DEBOUNCE) {
+                if (*debounce_pointer <= elapsed_time) {
                     *debounce_pointer = DEBOUNCE_ELAPSED;
                     cooked[row]       = (cooked[row] & ~(ROW_SHIFTER << col)) | (raw[row] & (ROW_SHIFTER << col));
                 } else {
+                    *debounce_pointer -= elapsed_time;
                     counters_need_update = true;
                 }
             }
@@ -96,14 +116,14 @@ void update_debounce_counters_and_transfer_if_expired(matrix_row_t raw[], matrix
     }
 }
 
-void start_debounce_counters(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time) {
+static void start_debounce_counters(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows) {
     debounce_counter_t *debounce_pointer = debounce_counters;
     for (uint8_t row = 0; row < num_rows; row++) {
         matrix_row_t delta = raw[row] ^ cooked[row];
         for (uint8_t col = 0; col < MATRIX_COLS; col++) {
             if (delta & (ROW_SHIFTER << col)) {
                 if (*debounce_pointer == DEBOUNCE_ELAPSED) {
-                    *debounce_pointer    = current_time;
+                    *debounce_pointer    = DEBOUNCE;
                     counters_need_update = true;
                 }
             } else {
@@ -115,3 +135,6 @@ void start_debounce_counters(matrix_row_t raw[], matrix_row_t cooked[], uint8_t
 }
 
 bool debounce_active(void) { return true; }
+#else
+#    include "none.c"
+#endif
diff --git a/quantum/debounce/sym_eager_pk.c b/quantum/debounce/sym_eager_pk.c
index e66cf92d7..15a3242e6 100644
--- a/quantum/debounce/sym_eager_pk.c
+++ b/quantum/debounce/sym_eager_pk.c
@@ -1,5 +1,6 @@
 /*
 Copyright 2017 Alex Ong<the.onga@gmail.com>
+Copyright 2021 Simon Arlott
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 2 of the License, or
@@ -33,29 +34,26 @@ No further inputs are accepted until DEBOUNCE milliseconds have occurred.
 #    define DEBOUNCE 5
 #endif
 
+// Maximum debounce: 255ms
+#if DEBOUNCE > UINT8_MAX
+#    undef DEBOUNCE
+#    define DEBOUNCE UINT8_MAX
+#endif
+
 #define ROW_SHIFTER ((matrix_row_t)1)
 
-#define debounce_counter_t uint8_t
+typedef uint8_t debounce_counter_t;
 
+#if DEBOUNCE > 0
 static debounce_counter_t *debounce_counters;
+static fast_timer_t        last_time;
 static bool                counters_need_update;
 static bool                matrix_need_update;
 
-#define DEBOUNCE_ELAPSED 251
-#define MAX_DEBOUNCE (DEBOUNCE_ELAPSED - 1)
-
-static uint8_t wrapping_timer_read(void) {
-    static uint16_t time        = 0;
-    static uint8_t  last_result = 0;
-    uint16_t        new_time    = timer_read();
-    uint16_t        diff        = new_time - time;
-    time                        = new_time;
-    last_result                 = (last_result + diff) % (MAX_DEBOUNCE + 1);
-    return last_result;
-}
+#define DEBOUNCE_ELAPSED 0
 
-void update_debounce_counters(uint8_t num_rows, uint8_t current_time);
-void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time);
+static void update_debounce_counters(uint8_t num_rows, uint8_t elapsed_time);
+static void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows);
 
 // we use num_rows rather than MATRIX_ROWS to support split keyboards
 void debounce_init(uint8_t num_rows) {
@@ -68,27 +66,51 @@ void debounce_init(uint8_t num_rows) {
     }
 }
 
+void debounce_free(void) {
+    free(debounce_counters);
+    debounce_counters = NULL;
+}
+
 void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
-    uint8_t current_time = wrapping_timer_read();
+    bool updated_last = false;
+
     if (counters_need_update) {
-        update_debounce_counters(num_rows, current_time);
+        fast_timer_t now = timer_read_fast();
+        fast_timer_t elapsed_time = TIMER_DIFF_FAST(now, last_time);
+
+        last_time = now;
+        updated_last = true;
+        if (elapsed_time > UINT8_MAX) {
+            elapsed_time = UINT8_MAX;
+        }
+
+        if (elapsed_time > 0) {
+            update_debounce_counters(num_rows, elapsed_time);
+        }
     }
 
     if (changed || matrix_need_update) {
-        transfer_matrix_values(raw, cooked, num_rows, current_time);
+        if (!updated_last) {
+            last_time = timer_read_fast();
+        }
+
+        transfer_matrix_values(raw, cooked, num_rows);
     }
 }
 
 // If the current time is > debounce counter, set the counter to enable input.
-void update_debounce_counters(uint8_t num_rows, uint8_t current_time) {
+static void update_debounce_counters(uint8_t num_rows, uint8_t elapsed_time) {
     counters_need_update                 = false;
+    matrix_need_update                   = false;
     debounce_counter_t *debounce_pointer = debounce_counters;
     for (uint8_t row = 0; row < num_rows; row++) {
         for (uint8_t col = 0; col < MATRIX_COLS; col++) {
             if (*debounce_pointer != DEBOUNCE_ELAPSED) {
-                if (TIMER_DIFF(current_time, *debounce_pointer, MAX_DEBOUNCE) >= DEBOUNCE) {
+                if (*debounce_pointer <= elapsed_time) {
                     *debounce_pointer = DEBOUNCE_ELAPSED;
+                    matrix_need_update = true;
                 } else {
+                    *debounce_pointer -= elapsed_time;
                     counters_need_update = true;
                 }
             }
@@ -98,8 +120,7 @@ void update_debounce_counters(uint8_t num_rows, uint8_t current_time) {
 }
 
 // upload from raw_matrix to final matrix;
-void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time) {
-    matrix_need_update                   = false;
+static void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows) {
     debounce_counter_t *debounce_pointer = debounce_counters;
     for (uint8_t row = 0; row < num_rows; row++) {
         matrix_row_t delta        = raw[row] ^ cooked[row];
@@ -108,11 +129,9 @@ void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t n
             matrix_row_t col_mask = (ROW_SHIFTER << col);
             if (delta & col_mask) {
                 if (*debounce_pointer == DEBOUNCE_ELAPSED) {
-                    *debounce_pointer    = current_time;
+                    *debounce_pointer    = DEBOUNCE;
                     counters_need_update = true;
                     existing_row ^= col_mask;  // flip the bit.
-                } else {
-                    matrix_need_update = true;
                 }
             }
             debounce_pointer++;
@@ -122,3 +141,6 @@ void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t n
 }
 
 bool debounce_active(void) { return true; }
+#else
+#    include "none.c"
+#endif
diff --git a/quantum/debounce/sym_eager_pr.c b/quantum/debounce/sym_eager_pr.c
index 20ccb46f1..2ad592c5a 100644
--- a/quantum/debounce/sym_eager_pr.c
+++ b/quantum/debounce/sym_eager_pr.c
@@ -1,5 +1,6 @@
 /*
 Copyright 2019 Alex Ong<the.onga@gmail.com>
+Copyright 2021 Simon Arlott
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 2 of the License, or
@@ -33,27 +34,25 @@ No further inputs are accepted until DEBOUNCE milliseconds have occurred.
 #    define DEBOUNCE 5
 #endif
 
-#define debounce_counter_t uint8_t
+// Maximum debounce: 255ms
+#if DEBOUNCE > UINT8_MAX
+#    undef DEBOUNCE
+#    define DEBOUNCE UINT8_MAX
+#endif
+
+typedef uint8_t debounce_counter_t;
+
+#if DEBOUNCE > 0
 static bool matrix_need_update;
 
 static debounce_counter_t *debounce_counters;
+static fast_timer_t        last_time;
 static bool                counters_need_update;
 
-#define DEBOUNCE_ELAPSED 251
-#define MAX_DEBOUNCE (DEBOUNCE_ELAPSED - 1)
-
-static uint8_t wrapping_timer_read(void) {
-    static uint16_t time        = 0;
-    static uint8_t  last_result = 0;
-    uint16_t        new_time    = timer_read();
-    uint16_t        diff        = new_time - time;
-    time                        = new_time;
-    last_result                 = (last_result + diff) % (MAX_DEBOUNCE + 1);
-    return last_result;
-}
+#define DEBOUNCE_ELAPSED 0
 
-void update_debounce_counters(uint8_t num_rows, uint8_t current_time);
-void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time);
+static void update_debounce_counters(uint8_t num_rows, uint8_t elapsed_time);
+static void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows);
 
 // we use num_rows rather than MATRIX_ROWS to support split keyboards
 void debounce_init(uint8_t num_rows) {
@@ -63,27 +62,50 @@ void debounce_init(uint8_t num_rows) {
     }
 }
 
+void debounce_free(void) {
+    free(debounce_counters);
+    debounce_counters = NULL;
+}
+
 void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
-    uint8_t current_time  = wrapping_timer_read();
-    bool    needed_update = counters_need_update;
+    bool updated_last = false;
+
     if (counters_need_update) {
-        update_debounce_counters(num_rows, current_time);
+        fast_timer_t now = timer_read_fast();
+        fast_timer_t elapsed_time = TIMER_DIFF_FAST(now, last_time);
+
+        last_time = now;
+        updated_last = true;
+        if (elapsed_time > UINT8_MAX) {
+            elapsed_time = UINT8_MAX;
+        }
+
+        if (elapsed_time > 0) {
+            update_debounce_counters(num_rows, elapsed_time);
+        }
     }
 
-    if (changed || (needed_update && !counters_need_update) || matrix_need_update) {
-        transfer_matrix_values(raw, cooked, num_rows, current_time);
+    if (changed || matrix_need_update) {
+        if (!updated_last) {
+            last_time = timer_read_fast();
+        }
+
+        transfer_matrix_values(raw, cooked, num_rows);
     }
 }
 
 // If the current time is > debounce counter, set the counter to enable input.
-void update_debounce_counters(uint8_t num_rows, uint8_t current_time) {
+static void update_debounce_counters(uint8_t num_rows, uint8_t elapsed_time) {
     counters_need_update                 = false;
+    matrix_need_update                   = false;
     debounce_counter_t *debounce_pointer = debounce_counters;
     for (uint8_t row = 0; row < num_rows; row++) {
         if (*debounce_pointer != DEBOUNCE_ELAPSED) {
-            if (TIMER_DIFF(current_time, *debounce_pointer, MAX_DEBOUNCE) >= DEBOUNCE) {
+            if (*debounce_pointer <= elapsed_time) {
                 *debounce_pointer = DEBOUNCE_ELAPSED;
+                matrix_need_update = true;
             } else {
+                *debounce_pointer -= elapsed_time;
                 counters_need_update = true;
             }
         }
@@ -92,8 +114,7 @@ void update_debounce_counters(uint8_t num_rows, uint8_t current_time) {
 }
 
 // upload from raw_matrix to final matrix;
-void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time) {
-    matrix_need_update                   = false;
+static void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows) {
     debounce_counter_t *debounce_pointer = debounce_counters;
     for (uint8_t row = 0; row < num_rows; row++) {
         matrix_row_t existing_row = cooked[row];
@@ -102,11 +123,9 @@ void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t n
         // determine new value basd on debounce pointer + raw value
         if (existing_row != raw_row) {
             if (*debounce_pointer == DEBOUNCE_ELAPSED) {
-                *debounce_pointer    = current_time;
+                *debounce_pointer    = DEBOUNCE;
                 cooked[row]          = raw_row;
                 counters_need_update = true;
-            } else {
-                matrix_need_update = true;
             }
         }
         debounce_pointer++;
@@ -114,3 +133,6 @@ void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t n
 }
 
 bool debounce_active(void) { return true; }
+#else
+#    include "none.c"
+#endif
diff --git a/quantum/debounce/tests/asym_eager_defer_pk_tests.cpp b/quantum/debounce/tests/asym_eager_defer_pk_tests.cpp
new file mode 100644
index 000000000..fe374c3df
--- /dev/null
+++ b/quantum/debounce/tests/asym_eager_defer_pk_tests.cpp
@@ -0,0 +1,374 @@
+/* Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "gtest/gtest.h"
+
+#include "debounce_test_common.h"
+
+TEST_F(DebounceTest, OneKeyShort1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        /* Release key after 1ms delay */
+        {1, {{0, 1, UP}}, {}},
+
+        /*
+         * Until the eager timer on DOWN is observed to finish, the defer timer
+         * on UP can't start. There's no workaround for this because it's not
+         * possible to debounce an event that isn't being tracked.
+         *
+         * sym_defer_pk has the same problem but the test has to track that the
+         * key changed state so the DOWN timer is always allowed to finish
+         * before starting the UP timer.
+         */
+        {5, {}, {}},
+
+        {10, {}, {{0, 1, UP}}}, /* 5ms+5ms after DOWN at time 0 */
+        /* Press key again after 1ms delay */
+        {11, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        /* Release key after 2ms delay */
+        {2, {{0, 1, UP}}, {}},
+
+        {5, {}, {}}, /* See OneKeyShort1 */
+
+        {10, {}, {{0, 1, UP}}}, /* 5ms+5ms after DOWN at time 0 */
+        /* Press key again after 1ms delay */
+        {11, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort3) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        /* Release key after 3ms delay */
+        {3, {{0, 1, UP}}, {}},
+
+        {5, {}, {}}, /* See OneKeyShort1 */
+
+        {10, {}, {{0, 1, UP}}}, /* 5ms+5ms after DOWN at time 0 */
+        /* Press key again after 1ms delay */
+        {11, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort4) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        /* Release key after 4ms delay */
+        {4, {{0, 1, UP}}, {}},
+
+        {5, {}, {}}, /* See OneKeyShort1 */
+
+        {10, {}, {{0, 1, UP}}}, /* 5ms+5ms after DOWN at time 0 */
+        /* Press key again after 1ms delay */
+        {11, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort5) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Release key after 5ms delay */
+        {5, {{0, 1, UP}}, {}},
+
+        {10, {}, {{0, 1, UP}}}, /* 5ms+5ms after DOWN at time 0 */
+        /* Press key again after 1ms delay */
+        {11, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort6) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Release key after 6ms delay */
+        {6, {{0, 1, UP}}, {}},
+
+        {11, {}, {{0, 1, UP}}}, /* 5ms after UP at time 6 */
+        /* Press key again after 1ms delay */
+        {12, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort7) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Release key after 7ms delay */
+        {7, {{0, 1, UP}}, {}},
+
+        {12, {}, {{0, 1, UP}}}, /* 5ms after UP at time 7 */
+        /* Press key again after 1ms delay */
+        {13, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort8) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        /* Release key after 1ms delay */
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {}}, /* See OneKeyShort1 */
+
+        {10, {}, {{0, 1, UP}}}, /* 5ms after UP at time 7 */
+        /* Press key again after 0ms delay (scan 2) */
+        {10, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort9) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        /* Release key after 1ms delay */
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {}}, /* See OneKeyShort1 */
+
+        /* Press key again after 0ms delay (same scan) before debounce finishes */
+        {10, {{0, 1, DOWN}}, {}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyBouncing1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+        {2, {{0, 1, DOWN}}, {}},
+        {3, {{0, 1, UP}}, {}},
+        {4, {{0, 1, DOWN}}, {}},
+        {5, {{0, 1, UP}}, {}},
+        {6, {{0, 1, DOWN}}, {}},
+        {7, {{0, 1, UP}}, {}},
+        {8, {{0, 1, DOWN}}, {}},
+        {9, {{0, 1, UP}}, {}},
+        {10, {{0, 1, DOWN}}, {}},
+        {11, {{0, 1, UP}}, {}},
+        {12, {{0, 1, DOWN}}, {}},
+        {13, {{0, 1, UP}}, {}},
+        {14, {{0, 1, DOWN}}, {}},
+        {15, {{0, 1, UP}}, {}},
+
+        {20, {}, {{0, 1, UP}}},
+        /* Press key again after 1ms delay */
+        {21, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyBouncing2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        /* Change twice in the same time period */
+        {1, {{0, 1, UP}}, {}},
+        {1, {{0, 1, DOWN}}, {}},
+        /* Change three times in the same time period */
+        {2, {{0, 1, UP}}, {}},
+        {2, {{0, 1, DOWN}}, {}},
+        {2, {{0, 1, UP}}, {}},
+        /* Change twice in the same time period */
+        {6, {{0, 1, DOWN}}, {}},
+        {6, {{0, 1, UP}}, {}},
+        /* Change three times in the same time period */
+        {7, {{0, 1, DOWN}}, {}},
+        {7, {{0, 1, UP}}, {}},
+        {7, {{0, 1, DOWN}}, {}},
+        /* Change twice in the same time period */
+        {8, {{0, 1, UP}}, {}},
+        {8, {{0, 1, DOWN}}, {}},
+        /* Change three times in the same time period */
+        {9, {{0, 1, UP}}, {}},
+        {9, {{0, 1, DOWN}}, {}},
+        {9, {{0, 1, UP}}, {}},
+
+        {14, {}, {{0, 1, UP}}},
+        /* Press key again after 1ms delay */
+        {15, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyLong) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        {25, {{0, 1, UP}}, {}},
+
+        {30, {}, {{0, 1, UP}}},
+
+        {50, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        {75, {{0, 1, UP}}, {}},
+
+        {80, {}, {{0, 1, UP}}},
+
+        {100, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysShort) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 2, DOWN}}, {{0, 2, DOWN}}},
+        /* Release key after 2ms delay */
+        {2, {{0, 1, UP}}, {}},
+        {3, {{0, 2, UP}}, {}},
+
+        {5, {}, {}}, /* See OneKeyShort1 */
+        {6, {}, {}}, /* See OneKeyShort1 */
+
+        {10, {}, {{0, 1, UP}}}, /* 5ms+5ms after DOWN at time 0 */
+        /* Press key again after 1ms delay */
+        {11, {{0, 1, DOWN}}, {{0, 1, DOWN}, {0, 2, UP}}}, /* 5ms+5ms after DOWN at time 0 */
+        {12, {{0, 2, DOWN}}, {{0, 2, DOWN}}}, /* 5ms+5ms after DOWN at time 0 */
+    });
+    runEvents();
+}
+
+
+TEST_F(DebounceTest, OneKeyDelayedScan1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late, immediately release key */
+        {300, {{0, 1, UP}}, {}},
+
+        {305, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late, immediately release key */
+        {300, {{0, 1, UP}}, {}},
+
+        /* Processing is very late again */
+        {600, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan3) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late */
+        {300, {}, {}},
+        /* Release key after 1ms */
+        {301, {{0, 1, UP}}, {}},
+
+        {306, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan4) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late */
+        {300, {}, {}},
+        /* Release key after 1ms */
+        {301, {{0, 1, UP}}, {}},
+
+        /* Processing is very late again */
+        {600, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan5) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        {5, {{0, 1, UP}}, {}},
+
+        /* Processing is very late */
+        {300, {}, {{0, 1, UP}}},
+        /* Immediately press key again */
+        {300, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan6) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        {5, {{0, 1, UP}}, {}},
+
+        /* Processing is very late */
+        {300, {}, {{0, 1, UP}}},
+
+        /* Press key again after 1ms */
+        {301, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan7) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        {5, {{0, 1, UP}}, {}},
+
+        /* Press key again before debounce expires */
+        {300, {{0, 1, DOWN}}, {}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan8) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is a bit late */
+        {50, {}, {}},
+        /* Release key after 1ms */
+        {51, {{0, 1, UP}}, {}},
+
+        /* Processing is a bit late again */
+        {100, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
diff --git a/quantum/debounce/tests/debounce_test_common.cpp b/quantum/debounce/tests/debounce_test_common.cpp
new file mode 100644
index 000000000..1c5e7c9f4
--- /dev/null
+++ b/quantum/debounce/tests/debounce_test_common.cpp
@@ -0,0 +1,229 @@
+/* Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "gtest/gtest.h"
+
+#include "debounce_test_common.h"
+
+#include <algorithm>
+#include <iomanip>
+#include <sstream>
+
+extern "C" {
+#include "quantum.h"
+#include "timer.h"
+#include "debounce.h"
+
+void set_time(uint32_t t);
+void advance_time(uint32_t ms);
+}
+
+void DebounceTest::addEvents(std::initializer_list<DebounceTestEvent> events) {
+    events_.insert(events_.end(), events.begin(), events.end());
+}
+
+void DebounceTest::runEvents() {
+    /* Run the test multiple times, from 1kHz to 10kHz scan rate */
+    for (extra_iterations_ = 0; extra_iterations_ < 10; extra_iterations_++) {
+        if (time_jumps_) {
+            /* Don't advance time smoothly, jump to the next event (some tests require this) */
+            auto_advance_time_ = false;
+            runEventsInternal();
+        } else {
+            /* Run the test with both smooth and irregular time; it must produce the same result */
+            auto_advance_time_ = true;
+            runEventsInternal();
+            auto_advance_time_ = false;
+            runEventsInternal();
+        }
+    }
+}
+
+void DebounceTest::runEventsInternal() {
+    fast_timer_t previous = 0;
+    bool first = true;
+
+    /* Initialise keyboard with start time (offset to avoid testing at 0) and all keys UP */
+    debounce_init(MATRIX_ROWS);
+    set_time(time_offset_);
+    std::fill(std::begin(input_matrix_), std::end(input_matrix_), 0);
+    std::fill(std::begin(output_matrix_), std::end(output_matrix_), 0);
+
+    for (auto &event : events_) {
+        if (!auto_advance_time_) {
+            /* Jump to the next event */
+            set_time(time_offset_ + event.time_);
+        } else if (!first && event.time_ == previous + 1) {
+            /* This event immediately follows the previous one, don't make extra debounce() calls */
+            advance_time(1);
+        } else {
+            /* Fast forward to the time for this event, calling debounce() with no changes */
+            ASSERT_LT((time_offset_ + event.time_) - timer_read_fast(), 60000) << "Test tries to advance more than 1 minute of time";
+
+            while (timer_read_fast() != time_offset_ + event.time_) {
+                runDebounce(false);
+                checkCookedMatrix(false, "debounce() modified cooked matrix");
+                advance_time(1);
+            }
+        }
+
+        first = false;
+        previous = event.time_;
+
+        /* Prepare input matrix */
+        for (auto &input : event.inputs_) {
+            matrixUpdate(input_matrix_, "input", input);
+        }
+
+        /* Call debounce */
+        runDebounce(!event.inputs_.empty());
+
+        /* Prepare output matrix */
+        for (auto &output : event.outputs_) {
+            matrixUpdate(output_matrix_, "output", output);
+        }
+
+        /* Check output matrix has expected change events */
+        for (auto &output : event.outputs_) {
+            EXPECT_EQ(!!(cooked_matrix_[output.row_] & (1U << output.col_)), directionValue(output.direction_))
+                    << "Missing event at " << strTime()
+                    << " expected key " << output.row_ << "," << output.col_ << " " << directionLabel(output.direction_)
+                    << "\ninput_matrix: changed=" << !event.inputs_.empty() << "\n" << strMatrix(input_matrix_)
+                    << "\nexpected_matrix:\n" << strMatrix(output_matrix_)
+                    << "\nactual_matrix:\n" << strMatrix(cooked_matrix_);
+        }
+
+        /* Check output matrix has no other changes */
+        checkCookedMatrix(!event.inputs_.empty(), "debounce() cooked matrix does not match expected output matrix");
+
+        /* Perform some extra iterations of the matrix scan with no changes */
+        for (int i = 0; i < extra_iterations_; i++) {
+            runDebounce(false);
+            checkCookedMatrix(false, "debounce() modified cooked matrix");
+        }
+    }
+
+    /* Check that no further changes happen for 1 minute */
+    for (int i = 0; i < 60000; i++) {
+        runDebounce(false);
+        checkCookedMatrix(false, "debounce() modified cooked matrix");
+        advance_time(1);
+    }
+
+    debounce_free();
+}
+
+void DebounceTest::runDebounce(bool changed) {
+    std::copy(std::begin(input_matrix_), std::end(input_matrix_), std::begin(raw_matrix_));
+    std::copy(std::begin(output_matrix_), std::end(output_matrix_), std::begin(cooked_matrix_));
+
+    debounce(raw_matrix_, cooked_matrix_, MATRIX_ROWS, changed);
+
+    if (!std::equal(std::begin(input_matrix_), std::end(input_matrix_), std::begin(raw_matrix_))) {
+        FAIL() << "Fatal error: debounce() modified raw matrix at " << strTime()
+            << "\ninput_matrix: changed=" << changed << "\n" << strMatrix(input_matrix_)
+            << "\nraw_matrix:\n" << strMatrix(raw_matrix_);
+    }
+}
+
+void DebounceTest::checkCookedMatrix(bool changed, const std::string &error_message) {
+    if (!std::equal(std::begin(output_matrix_), std::end(output_matrix_), std::begin(cooked_matrix_))) {
+        FAIL() << "Unexpected event: " << error_message << " at " << strTime()
+            << "\ninput_matrix: changed=" << changed << "\n" << strMatrix(input_matrix_)
+            << "\nexpected_matrix:\n" << strMatrix(output_matrix_)
+            << "\nactual_matrix:\n" << strMatrix(cooked_matrix_);
+    }
+}
+
+std::string DebounceTest::strTime() {
+    std::stringstream text;
+
+    text << "time " << (timer_read_fast() - time_offset_)
+        << " (extra_iterations=" << extra_iterations_
+        << ", auto_advance_time=" << auto_advance_time_ << ")";
+
+    return text.str();
+}
+
+std::string DebounceTest::strMatrix(matrix_row_t matrix[]) {
+    std::stringstream text;
+
+    text << "\t" << std::setw(3) << "";
+    for (int col = 0; col < MATRIX_COLS; col++) {
+        text << " " << std::setw(2) << col;
+    }
+    text << "\n";
+
+    for (int row = 0; row < MATRIX_ROWS; row++) {
+        text << "\t" << std::setw(2) << row << ":";
+        for (int col = 0; col < MATRIX_COLS; col++) {
+            text << ((matrix[row] & (1U << col)) ? " XX" : " __");
+        }
+
+        text << "\n";
+    }
+
+    return text.str();
+}
+
+bool DebounceTest::directionValue(Direction direction) {
+    switch (direction) {
+    case DOWN:
+        return true;
+
+    case UP:
+        return false;
+    }
+}
+
+std::string DebounceTest::directionLabel(Direction direction) {
+    switch (direction) {
+    case DOWN:
+        return "DOWN";
+
+    case UP:
+        return "UP";
+    }
+}
+
+/* Modify a matrix and verify that events always specify a change */
+void DebounceTest::matrixUpdate(matrix_row_t matrix[], const std::string &name, const MatrixTestEvent &event) {
+    ASSERT_NE(!!(matrix[event.row_] & (1U << event.col_)), directionValue(event.direction_))
+        << "Test " << name << " at " << strTime()
+        << " sets key " << event.row_ << "," << event.col_ << " " << directionLabel(event.direction_)
+        << " but it is already " << directionLabel(event.direction_)
+        << "\n" << name << "_matrix:\n" << strMatrix(matrix);
+
+    switch (event.direction_) {
+    case DOWN:
+        matrix[event.row_] |= (1U << event.col_);
+        break;
+
+    case UP:
+        matrix[event.row_] &= ~(1U << event.col_);
+        break;
+    }
+}
+
+DebounceTestEvent::DebounceTestEvent(fast_timer_t time,
+        std::initializer_list<MatrixTestEvent> inputs,
+        std::initializer_list<MatrixTestEvent> outputs)
+        : time_(time), inputs_(inputs), outputs_(outputs) {
+}
+
+MatrixTestEvent::MatrixTestEvent(int row, int col, Direction direction)
+        : row_(row), col_(col), direction_(direction) {
+}
diff --git a/quantum/debounce/tests/debounce_test_common.h b/quantum/debounce/tests/debounce_test_common.h
new file mode 100644
index 000000000..d87e31059
--- /dev/null
+++ b/quantum/debounce/tests/debounce_test_common.h
@@ -0,0 +1,83 @@
+/* Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "gtest/gtest.h"
+
+#include <initializer_list>
+#include <list>
+#include <string>
+
+extern "C" {
+#include "quantum.h"
+#include "timer.h"
+}
+
+enum Direction {
+    DOWN,
+    UP,
+};
+
+class MatrixTestEvent {
+public:
+    MatrixTestEvent(int row, int col, Direction direction);
+
+    const int row_;
+    const int col_;
+    const Direction direction_;
+};
+
+class DebounceTestEvent {
+public:
+    // 0, {{0, 1, DOWN}}, {{0, 1, DOWN}})
+    DebounceTestEvent(fast_timer_t time,
+        std::initializer_list<MatrixTestEvent> inputs,
+        std::initializer_list<MatrixTestEvent> outputs);
+
+    const fast_timer_t time_;
+    const std::list<MatrixTestEvent> inputs_;
+    const std::list<MatrixTestEvent> outputs_;
+};
+
+class DebounceTest : public ::testing::Test {
+protected:
+    void addEvents(std::initializer_list<DebounceTestEvent> events);
+    void runEvents();
+
+    fast_timer_t time_offset_ = 7777;
+    bool time_jumps_ = false;
+
+private:
+    static bool directionValue(Direction direction);
+    static std::string directionLabel(Direction direction);
+
+    void runEventsInternal();
+    void runDebounce(bool changed);
+    void checkCookedMatrix(bool changed, const std::string &error_message);
+    void matrixUpdate(matrix_row_t matrix[], const std::string &name, const MatrixTestEvent &event);
+
+    std::string strTime();
+    std::string strMatrix(matrix_row_t matrix[]);
+
+    std::list<DebounceTestEvent> events_;
+
+    matrix_row_t input_matrix_[MATRIX_ROWS];
+    matrix_row_t raw_matrix_[MATRIX_ROWS];
+    matrix_row_t cooked_matrix_[MATRIX_ROWS];
+    matrix_row_t output_matrix_[MATRIX_ROWS];
+
+    int extra_iterations_;
+    bool auto_advance_time_;
+};
diff --git a/quantum/debounce/tests/rules.mk b/quantum/debounce/tests/rules.mk
new file mode 100644
index 000000000..66928d7eb
--- /dev/null
+++ b/quantum/debounce/tests/rules.mk
@@ -0,0 +1,44 @@
+# Copyright 2021 Simon Arlott
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+DEBOUNCE_COMMON_DEFS := -DMATRIX_ROWS=4 -DMATRIX_COLS=10 -DDEBOUNCE=5
+
+DEBOUNCE_COMMON_SRC := $(QUANTUM_PATH)/debounce/tests/debounce_test_common.cpp \
+        $(TMK_PATH)/common/test/timer.c
+
+debounce_sym_defer_g_DEFS := $(DEBOUNCE_COMMON_DEFS)
+debounce_sym_defer_g_SRC := $(DEBOUNCE_COMMON_SRC) \
+        $(QUANTUM_PATH)/debounce/sym_defer_g.c \
+        $(QUANTUM_PATH)/debounce/tests/sym_defer_g_tests.cpp
+
+debounce_sym_defer_pk_DEFS := $(DEBOUNCE_COMMON_DEFS)
+debounce_sym_defer_pk_SRC := $(DEBOUNCE_COMMON_SRC) \
+        $(QUANTUM_PATH)/debounce/sym_defer_pk.c \
+        $(QUANTUM_PATH)/debounce/tests/sym_defer_pk_tests.cpp
+
+debounce_sym_eager_pk_DEFS := $(DEBOUNCE_COMMON_DEFS)
+debounce_sym_eager_pk_SRC := $(DEBOUNCE_COMMON_SRC) \
+        $(QUANTUM_PATH)/debounce/sym_eager_pk.c \
+        $(QUANTUM_PATH)/debounce/tests/sym_eager_pk_tests.cpp
+
+debounce_sym_eager_pr_DEFS := $(DEBOUNCE_COMMON_DEFS)
+debounce_sym_eager_pr_SRC := $(DEBOUNCE_COMMON_SRC) \
+        $(QUANTUM_PATH)/debounce/sym_eager_pr.c \
+        $(QUANTUM_PATH)/debounce/tests/sym_eager_pr_tests.cpp
+
+debounce_asym_eager_defer_pk_DEFS := $(DEBOUNCE_COMMON_DEFS)
+debounce_asym_eager_defer_pk_SRC := $(DEBOUNCE_COMMON_SRC) \
+        $(QUANTUM_PATH)/debounce/asym_eager_defer_pk.c \
+        $(QUANTUM_PATH)/debounce/tests/asym_eager_defer_pk_tests.cpp
diff --git a/quantum/debounce/tests/sym_defer_g_tests.cpp b/quantum/debounce/tests/sym_defer_g_tests.cpp
new file mode 100644
index 000000000..a56aecd8f
--- /dev/null
+++ b/quantum/debounce/tests/sym_defer_g_tests.cpp
@@ -0,0 +1,223 @@
+/* Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "gtest/gtest.h"
+
+#include "debounce_test_common.h"
+
+TEST_F(DebounceTest, OneKeyShort1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        /* 0ms delay (fast scan rate) */
+        {5, {{0, 1, UP}}, {}},
+
+        {10, {}, {{0, 1, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        /* 1ms delay */
+        {6, {{0, 1, UP}}, {}},
+
+        {11, {}, {{0, 1, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort3) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        /* 2ms delay */
+        {7, {{0, 1, UP}}, {}},
+
+        {12, {}, {{0, 1, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyTooQuick1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        /* Release key exactly on the debounce time */
+        {5, {{0, 1, UP}}, {}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyTooQuick2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        {6, {{0, 1, UP}}, {}},
+
+        /* Press key exactly on the debounce time */
+        {11, {{0, 1, DOWN}}, {}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyBouncing1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        {1, {{0, 1, UP}}, {}},
+        {2, {{0, 1, DOWN}}, {}},
+        {3, {{0, 1, UP}}, {}},
+        {4, {{0, 1, DOWN}}, {}},
+        {5, {{0, 1, UP}}, {}},
+        {6, {{0, 1, DOWN}}, {}},
+        {11, {}, {{0, 1, DOWN}}}, /* 5ms after DOWN at time 7 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyBouncing2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        {5, {}, {{0, 1, DOWN}}},
+        {6, {{0, 1, UP}}, {}},
+        {7, {{0, 1, DOWN}}, {}},
+        {8, {{0, 1, UP}}, {}},
+        {9, {{0, 1, DOWN}}, {}},
+        {10, {{0, 1, UP}}, {}},
+        {15, {}, {{0, 1, UP}}}, /* 5ms after UP at time 10 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyLong) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+
+        {25, {{0, 1, UP}}, {}},
+
+        {30, {}, {{0, 1, UP}}},
+
+        {50, {{0, 1, DOWN}}, {}},
+
+        {55, {}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysShort) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        {1, {{0, 2, DOWN}}, {}},
+
+        {6, {}, {{0, 1, DOWN}, {0, 2, DOWN}}},
+
+        {7, {{0, 1, UP}}, {}},
+        {8, {{0, 2, UP}}, {}},
+
+        {13, {}, {{0, 1, UP}, {0, 2, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysSimultaneous1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}, {0, 2, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}, {0, 2, DOWN}}},
+        {6, {{0, 1, UP}, {0, 2, UP}}, {}},
+
+        {11, {}, {{0, 1, UP}, {0, 2, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysSimultaneous2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        {1, {{0, 2, DOWN}}, {}},
+
+        {5, {}, {}},
+        {6, {}, {{0, 1, DOWN}, {0, 2, DOWN}}},
+        {7, {{0, 1, UP}}, {}},
+        {8, {{0, 2, UP}}, {}},
+
+        {13, {}, {{0, 1, UP}, {0, 2, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        /* Processing is very late */
+        {300, {}, {{0, 1, DOWN}}},
+        /* Immediately release key */
+        {300, {{0, 1, UP}}, {}},
+
+        {305, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        /* Processing is very late */
+        {300, {}, {{0, 1, DOWN}}},
+        /* Release key after 1ms */
+        {301, {{0, 1, UP}}, {}},
+
+        {306, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan3) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        /* Release key before debounce expires */
+        {300, {{0, 1, UP}}, {}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan4) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        /* Processing is a bit late */
+        {50, {}, {{0, 1, DOWN}}},
+        /* Release key after 1ms */
+        {51, {{0, 1, UP}}, {}},
+
+        {56, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
diff --git a/quantum/debounce/tests/sym_defer_pk_tests.cpp b/quantum/debounce/tests/sym_defer_pk_tests.cpp
new file mode 100644
index 000000000..1f3061e59
--- /dev/null
+++ b/quantum/debounce/tests/sym_defer_pk_tests.cpp
@@ -0,0 +1,225 @@
+/* Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "gtest/gtest.h"
+
+#include "debounce_test_common.h"
+
+TEST_F(DebounceTest, OneKeyShort1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        /* 0ms delay (fast scan rate) */
+        {5, {{0, 1, UP}}, {}},
+
+        {10, {}, {{0, 1, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        /* 1ms delay */
+        {6, {{0, 1, UP}}, {}},
+
+        {11, {}, {{0, 1, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort3) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        /* 2ms delay */
+        {7, {{0, 1, UP}}, {}},
+
+        {12, {}, {{0, 1, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyTooQuick1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        /* Release key exactly on the debounce time */
+        {5, {{0, 1, UP}}, {}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyTooQuick2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        {6, {{0, 1, UP}}, {}},
+
+        /* Press key exactly on the debounce time */
+        {11, {{0, 1, DOWN}}, {}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyBouncing1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        {1, {{0, 1, UP}}, {}},
+        {2, {{0, 1, DOWN}}, {}},
+        {3, {{0, 1, UP}}, {}},
+        {4, {{0, 1, DOWN}}, {}},
+        {5, {{0, 1, UP}}, {}},
+        {6, {{0, 1, DOWN}}, {}},
+        {11, {}, {{0, 1, DOWN}}}, /* 5ms after DOWN at time 7 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyBouncing2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        {5, {}, {{0, 1, DOWN}}},
+        {6, {{0, 1, UP}}, {}},
+        {7, {{0, 1, DOWN}}, {}},
+        {8, {{0, 1, UP}}, {}},
+        {9, {{0, 1, DOWN}}, {}},
+        {10, {{0, 1, UP}}, {}},
+        {15, {}, {{0, 1, UP}}}, /* 5ms after UP at time 10 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyLong) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+
+        {25, {{0, 1, UP}}, {}},
+
+        {30, {}, {{0, 1, UP}}},
+
+        {50, {{0, 1, DOWN}}, {}},
+
+        {55, {}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysShort) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        {1, {{0, 2, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        {6, {}, {{0, 2, DOWN}}},
+
+        {7, {{0, 1, UP}}, {}},
+        {8, {{0, 2, UP}}, {}},
+
+        {12, {}, {{0, 1, UP}}},
+        {13, {}, {{0, 2, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysSimultaneous1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}, {0, 2, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}, {0, 2, DOWN}}},
+        {6, {{0, 1, UP}, {0, 2, UP}}, {}},
+
+        {11, {}, {{0, 1, UP}, {0, 2, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysSimultaneous2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        {1, {{0, 2, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        {6, {{0, 1, UP}}, {{0, 2, DOWN}}},
+        {7, {{0, 2, UP}}, {}},
+
+        {11, {}, {{0, 1, UP}}},
+        {12, {}, {{0, 2, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        /* Processing is very late */
+        {300, {}, {{0, 1, DOWN}}},
+        /* Immediately release key */
+        {300, {{0, 1, UP}}, {}},
+
+        {305, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        /* Processing is very late */
+        {300, {}, {{0, 1, DOWN}}},
+        /* Release key after 1ms */
+        {301, {{0, 1, UP}}, {}},
+
+        {306, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan3) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        /* Release key before debounce expires */
+        {300, {{0, 1, UP}}, {}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan4) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        /* Processing is a bit late */
+        {50, {}, {{0, 1, DOWN}}},
+        /* Release key after 1ms */
+        {51, {{0, 1, UP}}, {}},
+
+        {56, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
diff --git a/quantum/debounce/tests/sym_eager_pk_tests.cpp b/quantum/debounce/tests/sym_eager_pk_tests.cpp
new file mode 100644
index 000000000..e0fc205e3
--- /dev/null
+++ b/quantum/debounce/tests/sym_eager_pk_tests.cpp
@@ -0,0 +1,237 @@
+/* Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "gtest/gtest.h"
+
+#include "debounce_test_common.h"
+
+TEST_F(DebounceTest, OneKeyShort1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key again after 1ms delay (debounce has not yet finished) */
+        {6, {{0, 1, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key again after 2ms delay (debounce has not yet finished) */
+        {7, {{0, 1, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort3) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key again after 3ms delay (debounce has not yet finished) */
+        {8, {{0, 1, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort4) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key again after 4ms delay (debounce has not yet finished) */
+        {9, {{0, 1, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort5) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key again after 5ms delay (debounce has finished) */
+        {10, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort6) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key after after 6ms delay (debounce has finished) */
+        {11, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyBouncing1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+        {2, {{0, 1, DOWN}}, {}},
+        {3, {{0, 1, UP}}, {}},
+        {4, {{0, 1, DOWN}}, {}},
+        {5, {{0, 1, UP}}, {{0, 1, UP}}},
+        /* Press key again after 1ms delay (debounce has not yet finished) */
+        {6, {{0, 1, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyBouncing2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        /* Change twice in the same time period */
+        {1, {{0, 1, UP}}, {}},
+        {1, {{0, 1, DOWN}}, {}},
+        /* Change three times in the same time period */
+        {2, {{0, 1, UP}}, {}},
+        {2, {{0, 1, DOWN}}, {}},
+        {2, {{0, 1, UP}}, {}},
+        /* Change three times in the same time period */
+        {3, {{0, 1, DOWN}}, {}},
+        {3, {{0, 1, UP}}, {}},
+        {3, {{0, 1, DOWN}}, {}},
+        /* Change twice in the same time period */
+        {4, {{0, 1, UP}}, {}},
+        {4, {{0, 1, DOWN}}, {}},
+        {5, {{0, 1, UP}}, {{0, 1, UP}}},
+        /* Press key again after 1ms delay (debounce has not yet finished) */
+        {6, {{0, 1, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyLong) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        {25, {{0, 1, UP}}, {{0, 1, UP}}},
+
+        {50, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysShort) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+        {2, {{0, 2, DOWN}}, {{0, 2, DOWN}}},
+        {3, {{0, 2, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key again after 1ms delay (debounce has not yet finished) */
+        {6, {{0, 1, DOWN}}, {}},
+        {7, {}, {{0, 2, UP}}},
+
+        /* Press key again after 1ms delay (debounce has not yet finished) */
+        {9, {{0, 2, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+
+        {12, {}, {{0, 2, DOWN}}}, /* 5ms after UP at time 7 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late but the change will now be accepted */
+        {300, {{0, 1, UP}}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late but the change will now be accepted even with a 1 scan delay */
+        {300, {}, {}},
+        {300, {{0, 1, UP}}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan3) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late but the change will now be accepted even with a 1ms delay */
+        {300, {}, {}},
+        {301, {{0, 1, UP}}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan4) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is a bit late but the change will now be accepted */
+        {50, {{0, 1, UP}}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan5) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late but the change will now be accepted even with a 1 scan delay */
+        {50, {}, {}},
+        {50, {{0, 1, UP}}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan6) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late but the change will now be accepted even with a 1ms delay */
+        {50, {}, {}},
+        {51, {{0, 1, UP}}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
diff --git a/quantum/debounce/tests/sym_eager_pr_tests.cpp b/quantum/debounce/tests/sym_eager_pr_tests.cpp
new file mode 100644
index 000000000..2c4bca127
--- /dev/null
+++ b/quantum/debounce/tests/sym_eager_pr_tests.cpp
@@ -0,0 +1,280 @@
+/* Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "gtest/gtest.h"
+
+#include "debounce_test_common.h"
+
+TEST_F(DebounceTest, OneKeyShort1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key again after 1ms delay (debounce has not yet finished) */
+        {6, {{0, 1, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key again after 2ms delay (debounce has not yet finished) */
+        {7, {{0, 1, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort3) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key again after 3ms delay (debounce has not yet finished) */
+        {8, {{0, 1, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort4) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key again after 4ms delay (debounce has not yet finished) */
+        {9, {{0, 1, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort5) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key again after 5ms delay (debounce has finished) */
+        {10, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort6) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key after after 6ms delay (debounce has finished) */
+        {11, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyBouncing1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+        {2, {{0, 1, DOWN}}, {}},
+        {3, {{0, 1, UP}}, {}},
+        {4, {{0, 1, DOWN}}, {}},
+        {5, {{0, 1, UP}}, {{0, 1, UP}}},
+        /* Press key again after 1ms delay (debounce has not yet finished) */
+        {6, {{0, 1, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyBouncing2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        /* Change twice in the same time period */
+        {1, {{0, 1, UP}}, {}},
+        {1, {{0, 1, DOWN}}, {}},
+        /* Change three times in the same time period */
+        {2, {{0, 1, UP}}, {}},
+        {2, {{0, 1, DOWN}}, {}},
+        {2, {{0, 1, UP}}, {}},
+        /* Change three times in the same time period */
+        {3, {{0, 1, DOWN}}, {}},
+        {3, {{0, 1, UP}}, {}},
+        {3, {{0, 1, DOWN}}, {}},
+        /* Change twice in the same time period */
+        {4, {{0, 1, UP}}, {}},
+        {4, {{0, 1, DOWN}}, {}},
+        {5, {{0, 1, UP}}, {{0, 1, UP}}},
+        /* Press key again after 1ms delay (debounce has not yet finished) */
+        {6, {{0, 1, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyLong) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        {25, {{0, 1, UP}}, {{0, 1, UP}}},
+
+        {50, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoRowsShort) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+        {2, {{2, 0, DOWN}}, {{2, 0, DOWN}}},
+        {3, {{2, 0, UP}}, {}},
+
+        {5, {}, {{0, 1, UP}}},
+        /* Press key again after 1ms delay (debounce has not yet finished) */
+        {6, {{0, 1, DOWN}}, {}},
+        {7, {}, {{2, 0, UP}}},
+
+        /* Press key again after 1ms delay (debounce has not yet finished) */
+        {9, {{2, 0, DOWN}}, {}},
+        {10, {}, {{0, 1, DOWN}}}, /* 5ms after UP at time 5 */
+
+        {12, {}, {{2, 0, DOWN}}}, /* 5ms after UP at time 7 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysOverlap) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+        {1, {{0, 1, UP}}, {}},
+        /* Press a second key during the first debounce */
+        {2, {{0, 2, DOWN}}, {}},
+
+        /* Key registers as soon as debounce finishes, 5ms after time 0 */
+        {5, {}, {{0, 1, UP}, {0, 2, DOWN}}},
+        {6, {{0, 1, DOWN}}, {}},
+
+        /* Key registers as soon as debounce finishes, 5ms after time 5 */
+        {10, {}, {{0, 1, DOWN}}},
+        /* Release both keys */
+        {11, {{0, 1, UP}}, {}},
+        {12, {{0, 2, UP}}, {}},
+
+        /* Keys register as soon as debounce finishes, 5ms after time 10 */
+        {15, {}, {{0, 1, UP}, {0, 2, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysSimultaneous1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}, {0, 2, DOWN}}, {{0, 1, DOWN}, {0, 2, DOWN}}},
+        {20, {{0, 1, UP}}, {{0, 1, UP}}},
+        {21, {{0, 2, UP}}, {}},
+
+        /* Key registers as soon as debounce finishes, 5ms after time 20 */
+        {25, {}, {{0, 2, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysSimultaneous2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}, {0, 2, DOWN}}, {{0, 1, DOWN}, {0, 2, DOWN}}},
+        {20, {{0, 1, UP}, {0, 2, UP}}, {{0, 1, UP}, {0, 2, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late but the change will now be accepted */
+        {300, {{0, 1, UP}}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late but the change will now be accepted even with a 1 scan delay */
+        {300, {}, {}},
+        {300, {{0, 1, UP}}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan3) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late but the change will now be accepted even with a 1ms delay */
+        {300, {}, {}},
+        {301, {{0, 1, UP}}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan4) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is a bit late but the change will now be accepted */
+        {50, {{0, 1, UP}}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan5) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late but the change will now be accepted even with a 1 scan delay */
+        {50, {}, {}},
+        {50, {{0, 1, UP}}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan6) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {{0, 1, DOWN}}},
+
+        /* Processing is very late but the change will now be accepted even with a 1ms delay */
+        {50, {}, {}},
+        {51, {{0, 1, UP}}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
diff --git a/quantum/debounce/tests/testlist.mk b/quantum/debounce/tests/testlist.mk
new file mode 100644
index 000000000..c54c45aa6
--- /dev/null
+++ b/quantum/debounce/tests/testlist.mk
@@ -0,0 +1,6 @@
+TEST_LIST += \
+        debounce_sym_defer_g \
+        debounce_sym_defer_pk \
+        debounce_sym_eager_pk \
+        debounce_sym_eager_pr \
+        debounce_asym_eager_defer_pk
diff --git a/quantum/led_matrix_animations/alpha_mods_anim.h b/quantum/led_matrix/animations/alpha_mods_anim.h
index 6f69f6892..a4638fde6 100644
--- a/quantum/led_matrix_animations/alpha_mods_anim.h
+++ b/quantum/led_matrix/animations/alpha_mods_anim.h
@@ -21,4 +21,4 @@ bool ALPHAS_MODS(effect_params_t* params) {
 }
 
 #    endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#endif  // DISABLE_LED_MATRIX_ALPHAS_MODS
+#endif      // DISABLE_LED_MATRIX_ALPHAS_MODS
diff --git a/quantum/led_matrix_animations/band_anim.h b/quantum/led_matrix/animations/band_anim.h
index 523dba1b7..f9cb85dc4 100644
--- a/quantum/led_matrix_animations/band_anim.h
+++ b/quantum/led_matrix/animations/band_anim.h
@@ -10,4 +10,4 @@ static uint8_t BAND_math(uint8_t val, uint8_t i, uint8_t time) {
 bool BAND(effect_params_t* params) { return effect_runner_i(params, &BAND_math); }
 
 #    endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#endif  // DISABLE_LED_MATRIX_BAND
+#endif      // DISABLE_LED_MATRIX_BAND
diff --git a/quantum/led_matrix_animations/band_pinwheel_anim.h b/quantum/led_matrix/animations/band_pinwheel_anim.h
index fb3b835ca..d3144bffb 100644
--- a/quantum/led_matrix_animations/band_pinwheel_anim.h
+++ b/quantum/led_matrix/animations/band_pinwheel_anim.h
@@ -7,4 +7,4 @@ static uint8_t BAND_PINWHEEL_math(uint8_t val, int16_t dx, int16_t dy, uint8_t t
 bool BAND_PINWHEEL(effect_params_t* params) { return effect_runner_dx_dy(params, &BAND_PINWHEEL_math); }
 
 #    endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#endif  // DISABLE_LED_MATRIX_BAND_PINWHEEL
+#endif      // DISABLE_LED_MATRIX_BAND_PINWHEEL
diff --git a/quantum/led_matrix_animations/band_spiral_anim.h b/quantum/led_matrix/animations/band_spiral_anim.h
index fca22aad9..defbe6967 100644
--- a/quantum/led_matrix_animations/band_spiral_anim.h
+++ b/quantum/led_matrix/animations/band_spiral_anim.h
@@ -7,4 +7,4 @@ static uint8_t BAND_SPIRAL_math(uint8_t val, int16_t dx, int16_t dy, uint8_t dis
 bool BAND_SPIRAL(effect_params_t* params) { return effect_runner_dx_dy_dist(params, &BAND_SPIRAL_math); }
 
 #    endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#endif  // DISABLE_LED_MATRIX_BAND_SPIRAL
+#endif      // DISABLE_LED_MATRIX_BAND_SPIRAL
diff --git a/quantum/led_matrix_animations/breathing_anim.h b/quantum/led_matrix/animations/breathing_anim.h
index 00310e3f6..4f49f5069 100644
--- a/quantum/led_matrix_animations/breathing_anim.h
+++ b/quantum/led_matrix/animations/breathing_anim.h
@@ -16,4 +16,4 @@ bool BREATHING(effect_params_t* params) {
 }
 
 #    endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#endif  // DISABLE_LED_MATRIX_BREATHING
+#endif      // DISABLE_LED_MATRIX_BREATHING
diff --git a/quantum/led_matrix_animations/cycle_left_right_anim.h b/quantum/led_matrix/animations/cycle_left_right_anim.h
index 51e81d57c..c426d02fd 100644
--- a/quantum/led_matrix_animations/cycle_left_right_anim.h
+++ b/quantum/led_matrix/animations/cycle_left_right_anim.h
@@ -7,4 +7,4 @@ static uint8_t CYCLE_LEFT_RIGHT_math(uint8_t val, uint8_t i, uint8_t time) { ret
 bool CYCLE_LEFT_RIGHT(effect_params_t* params) { return effect_runner_i(params, &CYCLE_LEFT_RIGHT_math); }
 
 #    endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#endif  // DISABLE_LED_MATRIX_CYCLE_LEFT_RIGHT
+#endif      // DISABLE_LED_MATRIX_CYCLE_LEFT_RIGHT
diff --git a/quantum/led_matrix_animations/cycle_out_in_anim.h b/quantum/led_matrix/animations/cycle_out_in_anim.h
index f62061552..55527556f 100644
--- a/quantum/led_matrix_animations/cycle_out_in_anim.h
+++ b/quantum/led_matrix/animations/cycle_out_in_anim.h
@@ -7,4 +7,4 @@ static uint8_t CYCLE_OUT_IN_math(uint8_t val, int16_t dx, int16_t dy, uint8_t di
 bool CYCLE_OUT_IN(effect_params_t* params) { return effect_runner_dx_dy_dist(params, &CYCLE_OUT_IN_math); }
 
 #    endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#endif  // DISABLE_LED_MATRIX_CYCLE_OUT_IN
+#endif      // DISABLE_LED_MATRIX_CYCLE_OUT_IN
diff --git a/quantum/led_matrix_animations/cycle_up_down_anim.h b/quantum/led_matrix/animations/cycle_up_down_anim.h
index bd1d12567..d97de0d1e 100644
--- a/quantum/led_matrix_animations/cycle_up_down_anim.h
+++ b/quantum/led_matrix/animations/cycle_up_down_anim.h
@@ -7,4 +7,4 @@ static uint8_t CYCLE_UP_DOWN_math(uint8_t val, uint8_t i, uint8_t time) { return
 bool CYCLE_UP_DOWN(effect_params_t* params) { return effect_runner_i(params, &CYCLE_UP_DOWN_math); }
 
 #    endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#endif  // DISABLE_LED_MATRIX_CYCLE_UP_DOWN
+#endif      // DISABLE_LED_MATRIX_CYCLE_UP_DOWN
diff --git a/quantum/led_matrix_animations/dual_beacon_anim.h b/quantum/led_matrix/animations/dual_beacon_anim.h
index 9b8a7877c..e1bc5ae46 100644
--- a/quantum/led_matrix_animations/dual_beacon_anim.h
+++ b/quantum/led_matrix/animations/dual_beacon_anim.h
@@ -7,4 +7,4 @@ static uint8_t DUAL_BEACON_math(uint8_t val, int8_t sin, int8_t cos, uint8_t i,
 bool DUAL_BEACON(effect_params_t* params) { return effect_runner_sin_cos_i(params, &DUAL_BEACON_math); }
 
 #    endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#endif  // DISABLE_LED_MATRIX_DUAL_BEACON
+#endif      // DISABLE_LED_MATRIX_DUAL_BEACON
diff --git a/quantum/led_matrix/animations/led_matrix_effects.inc b/quantum/led_matrix/animations/led_matrix_effects.inc
new file mode 100644
index 000000000..ad1f46b24
--- /dev/null
+++ b/quantum/led_matrix/animations/led_matrix_effects.inc
@@ -0,0 +1,18 @@
+// Add your new core led matrix effect here, order determines enum order
+#include "solid_anim.h"
+#include "alpha_mods_anim.h"
+#include "breathing_anim.h"
+#include "band_anim.h"
+#include "band_pinwheel_anim.h"
+#include "band_spiral_anim.h"
+#include "cycle_left_right_anim.h"
+#include "cycle_up_down_anim.h"
+#include "cycle_out_in_anim.h"
+#include "dual_beacon_anim.h"
+#include "solid_reactive_simple_anim.h"
+#include "solid_reactive_wide.h"
+#include "solid_reactive_cross.h"
+#include "solid_reactive_nexus.h"
+#include "solid_splash_anim.h"
+#include "wave_left_right_anim.h"
+#include "wave_up_down_anim.h"
diff --git a/quantum/led_matrix_runners/effect_runner_dx_dy.h b/quantum/led_matrix/animations/runners/effect_runner_dx_dy.h
index ef97631b9..ef97631b9 100644
--- a/quantum/led_matrix_runners/effect_runner_dx_dy.h
+++ b/quantum/led_matrix/animations/runners/effect_runner_dx_dy.h
diff --git a/quantum/led_matrix_runners/effect_runner_dx_dy_dist.h b/quantum/led_matrix/animations/runners/effect_runner_dx_dy_dist.h
index 5ef5938be..5ef5938be 100644
--- a/quantum/led_matrix_runners/effect_runner_dx_dy_dist.h
+++ b/quantum/led_matrix/animations/runners/effect_runner_dx_dy_dist.h
diff --git a/quantum/led_matrix_runners/effect_runner_i.h b/quantum/led_matrix/animations/runners/effect_runner_i.h
index b3015759b..b3015759b 100644
--- a/quantum/led_matrix_runners/effect_runner_i.h
+++ b/quantum/led_matrix/animations/runners/effect_runner_i.h
diff --git a/quantum/led_matrix_runners/effect_runner_reactive.h b/quantum/led_matrix/animations/runners/effect_runner_reactive.h
index 4369ea8c4..4369ea8c4 100644
--- a/quantum/led_matrix_runners/effect_runner_reactive.h
+++ b/quantum/led_matrix/animations/runners/effect_runner_reactive.h
diff --git a/quantum/led_matrix_runners/effect_runner_reactive_splash.h b/quantum/led_matrix/animations/runners/effect_runner_reactive_splash.h
index d6eb9731e..d6eb9731e 100644
--- a/quantum/led_matrix_runners/effect_runner_reactive_splash.h
+++ b/quantum/led_matrix/animations/runners/effect_runner_reactive_splash.h
diff --git a/quantum/led_matrix_runners/effect_runner_sin_cos_i.h b/quantum/led_matrix/animations/runners/effect_runner_sin_cos_i.h
index 4a5219abd..4a5219abd 100644
--- a/quantum/led_matrix_runners/effect_runner_sin_cos_i.h
+++ b/quantum/led_matrix/animations/runners/effect_runner_sin_cos_i.h
diff --git a/quantum/led_matrix/animations/runners/led_matrix_runners.inc b/quantum/led_matrix/animations/runners/led_matrix_runners.inc
new file mode 100644
index 000000000..c09022bb0
--- /dev/null
+++ b/quantum/led_matrix/animations/runners/led_matrix_runners.inc
@@ -0,0 +1,6 @@
+#include "effect_runner_dx_dy_dist.h"
+#include "effect_runner_dx_dy.h"
+#include "effect_runner_i.h"
+#include "effect_runner_sin_cos_i.h"
+#include "effect_runner_reactive.h"
+#include "effect_runner_reactive_splash.h"
diff --git a/quantum/led_matrix_animations/solid_anim.h b/quantum/led_matrix/animations/solid_anim.h
index 4c9e43c58..4c9e43c58 100644
--- a/quantum/led_matrix_animations/solid_anim.h
+++ b/quantum/led_matrix/animations/solid_anim.h
diff --git a/quantum/led_matrix_animations/solid_reactive_cross.h b/quantum/led_matrix/animations/solid_reactive_cross.h
index f402d99b3..94425c959 100644
--- a/quantum/led_matrix_animations/solid_reactive_cross.h
+++ b/quantum/led_matrix/animations/solid_reactive_cross.h
@@ -31,5 +31,5 @@ bool SOLID_REACTIVE_MULTICROSS(effect_params_t* params) { return effect_runner_r
 #            endif
 
 #        endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#    endif  // !defined(DISABLE_LED_MATRIX_SOLID_REACTIVE_CROSS) || !defined(DISABLE_LED_MATRIX_SOLID_REACTIVE_MULTICROSS)
-#endif  // LED_MATRIX_KEYREACTIVE_ENABLED
+#    endif      // !defined(DISABLE_LED_MATRIX_SOLID_REACTIVE_CROSS) || !defined(DISABLE_LED_MATRIX_SOLID_REACTIVE_MULTICROSS)
+#endif          // LED_MATRIX_KEYREACTIVE_ENABLED
diff --git a/quantum/led_matrix_animations/solid_reactive_nexus.h b/quantum/led_matrix/animations/solid_reactive_nexus.h
index 4d0d25226..504b1104f 100644
--- a/quantum/led_matrix_animations/solid_reactive_nexus.h
+++ b/quantum/led_matrix/animations/solid_reactive_nexus.h
@@ -28,5 +28,5 @@ bool SOLID_REACTIVE_MULTINEXUS(effect_params_t* params) { return effect_runner_r
 #            endif
 
 #        endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#    endif  // !defined(DISABLE_LED_MATRIX_SOLID_REACTIVE_NEXUS) || !defined(DISABLE_LED_MATRIX_SOLID_REACTIVE_MULTINEXUS)
-#endif  // LED_MATRIX_KEYREACTIVE_ENABLED
+#    endif      // !defined(DISABLE_LED_MATRIX_SOLID_REACTIVE_NEXUS) || !defined(DISABLE_LED_MATRIX_SOLID_REACTIVE_MULTINEXUS)
+#endif          // LED_MATRIX_KEYREACTIVE_ENABLED
diff --git a/quantum/led_matrix_animations/solid_reactive_simple_anim.h b/quantum/led_matrix/animations/solid_reactive_simple_anim.h
index 30e2527f6..4752a8416 100644
--- a/quantum/led_matrix_animations/solid_reactive_simple_anim.h
+++ b/quantum/led_matrix/animations/solid_reactive_simple_anim.h
@@ -8,5 +8,5 @@ static uint8_t SOLID_REACTIVE_SIMPLE_math(uint8_t val, uint16_t offset) { return
 bool SOLID_REACTIVE_SIMPLE(effect_params_t* params) { return effect_runner_reactive(params, &SOLID_REACTIVE_SIMPLE_math); }
 
 #        endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#    endif  // DISABLE_LED_MATRIX_SOLID_REACTIVE_SIMPLE
-#endif  // LED_MATRIX_KEYREACTIVE_ENABLED
+#    endif      // DISABLE_LED_MATRIX_SOLID_REACTIVE_SIMPLE
+#endif          // LED_MATRIX_KEYREACTIVE_ENABLED
diff --git a/quantum/led_matrix_animations/solid_reactive_wide.h b/quantum/led_matrix/animations/solid_reactive_wide.h
index 34a230c25..922e32fe5 100644
--- a/quantum/led_matrix_animations/solid_reactive_wide.h
+++ b/quantum/led_matrix/animations/solid_reactive_wide.h
@@ -26,5 +26,5 @@ bool SOLID_REACTIVE_MULTIWIDE(effect_params_t* params) { return effect_runner_re
 #            endif
 
 #        endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#    endif  // !defined(DISABLE_LED_MATRIX_SOLID_REACTIVE_WIDE) || !defined(DISABLE_LED_MATRIX_SOLID_REACTIVE_MULTIWIDE)
-#endif  // LED_MATRIX_KEYREACTIVE_ENABLED
+#    endif      // !defined(DISABLE_LED_MATRIX_SOLID_REACTIVE_WIDE) || !defined(DISABLE_LED_MATRIX_SOLID_REACTIVE_MULTIWIDE)
+#endif          // LED_MATRIX_KEYREACTIVE_ENABLED
diff --git a/quantum/led_matrix_animations/solid_splash_anim.h b/quantum/led_matrix/animations/solid_splash_anim.h
index 4f6ba3d34..d95889b81 100644
--- a/quantum/led_matrix_animations/solid_splash_anim.h
+++ b/quantum/led_matrix/animations/solid_splash_anim.h
@@ -26,5 +26,5 @@ bool SOLID_MULTISPLASH(effect_params_t* params) { return effect_runner_reactive_
 #            endif
 
 #        endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#    endif  // !defined(DISABLE_LED_MATRIX_SPLASH) && !defined(DISABLE_LED_MATRIX_MULTISPLASH)
-#endif  // LED_MATRIX_KEYREACTIVE_ENABLED
+#    endif      // !defined(DISABLE_LED_MATRIX_SPLASH) && !defined(DISABLE_LED_MATRIX_MULTISPLASH)
+#endif          // LED_MATRIX_KEYREACTIVE_ENABLED
diff --git a/quantum/led_matrix_animations/wave_left_right_anim.h b/quantum/led_matrix/animations/wave_left_right_anim.h
index 736f22ddc..8579f1b45 100644
--- a/quantum/led_matrix_animations/wave_left_right_anim.h
+++ b/quantum/led_matrix/animations/wave_left_right_anim.h
@@ -7,4 +7,4 @@ static uint8_t WAVE_LEFT_RIGHT_math(uint8_t val, uint8_t i, uint8_t time) { retu
 bool WAVE_LEFT_RIGHT(effect_params_t* params) { return effect_runner_i(params, &WAVE_LEFT_RIGHT_math); }
 
 #    endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#endif  // DISABLE_LED_MATRIX_WAVE_LEFT_RIGHT
+#endif      // DISABLE_LED_MATRIX_WAVE_LEFT_RIGHT
diff --git a/quantum/led_matrix_animations/wave_up_down_anim.h b/quantum/led_matrix/animations/wave_up_down_anim.h
index 3cab0597d..635c60841 100644
--- a/quantum/led_matrix_animations/wave_up_down_anim.h
+++ b/quantum/led_matrix/animations/wave_up_down_anim.h
@@ -7,4 +7,4 @@ static uint8_t WAVE_UP_DOWN_math(uint8_t val, uint8_t i, uint8_t time) { return
 bool WAVE_UP_DOWN(effect_params_t* params) { return effect_runner_i(params, &WAVE_UP_DOWN_math); }
 
 #    endif  // LED_MATRIX_CUSTOM_EFFECT_IMPLS
-#endif  // DISABLE_LED_MATRIX_WAVE_UP_DOWN
+#endif      // DISABLE_LED_MATRIX_WAVE_UP_DOWN
diff --git a/quantum/led_matrix.c b/quantum/led_matrix/led_matrix.c
index 7e0fdf896..32788866c 100644
--- a/quantum/led_matrix.c
+++ b/quantum/led_matrix/led_matrix.c
@@ -33,20 +33,23 @@ const led_point_t k_led_matrix_center = {112, 32};
 const led_point_t k_led_matrix_center = LED_MATRIX_CENTER;
 #endif
 
+// clang-format off
+#ifndef LED_MATRIX_IMMEDIATE_EEPROM
+#    define led_eeconfig_update(v) led_update_eeprom |= v
+#else
+#    define led_eeconfig_update(v) if (v) eeconfig_update_led_matrix()
+#endif
+// clang-format on
+
 // Generic effect runners
-#include "led_matrix_runners/effect_runner_dx_dy_dist.h"
-#include "led_matrix_runners/effect_runner_dx_dy.h"
-#include "led_matrix_runners/effect_runner_i.h"
-#include "led_matrix_runners/effect_runner_sin_cos_i.h"
-#include "led_matrix_runners/effect_runner_reactive.h"
-#include "led_matrix_runners/effect_runner_reactive_splash.h"
+#include "led_matrix_runners.inc"
 
 // ------------------------------------------
 // -----Begin led effect includes macros-----
 #define LED_MATRIX_EFFECT(name)
 #define LED_MATRIX_CUSTOM_EFFECT_IMPLS
 
-#include "led_matrix_animations/led_matrix_effects.inc"
+#include "led_matrix_effects.inc"
 #ifdef LED_MATRIX_CUSTOM_KB
 #    include "led_matrix_kb.inc"
 #endif
@@ -67,10 +70,6 @@ const led_point_t k_led_matrix_center = LED_MATRIX_CENTER;
 #    define LED_DISABLE_TIMEOUT 0
 #endif
 
-#if LED_DISABLE_WHEN_USB_SUSPENDED != 1
-#    undef LED_DISABLE_WHEN_USB_SUSPENDED
-#endif
-
 #if !defined(LED_MATRIX_MAXIMUM_BRIGHTNESS) || LED_MATRIX_MAXIMUM_BRIGHTNESS > UINT8_MAX
 #    undef LED_MATRIX_MAXIMUM_BRIGHTNESS
 #    define LED_MATRIX_MAXIMUM_BRIGHTNESS UINT8_MAX
@@ -108,6 +107,7 @@ last_hit_t g_last_hit_tracker;
 
 // internals
 static bool            suspend_state     = false;
+static bool            led_update_eeprom = false;
 static uint8_t         led_last_enable   = UINT8_MAX;
 static uint8_t         led_last_effect   = UINT8_MAX;
 static effect_params_t led_effect_params = {0, LED_FLAG_ALL, false};
@@ -280,6 +280,8 @@ static void led_task_timers(void) {
 
 static void led_task_sync(void) {
     // next task
+    if (led_update_eeprom) eeconfig_update_led_matrix();
+    led_update_eeprom = false;
     if (sync_timer_elapsed32(g_led_timer) >= LED_MATRIX_LED_FLUSH_LIMIT) led_task_state = STARTING;
 }
 
@@ -318,7 +320,7 @@ static void led_task_render(uint8_t effect) {
     case LED_MATRIX_##name:                   \
         rendering = name(&led_effect_params); \
         break;
-#include "led_matrix_animations/led_matrix_effects.inc"
+#include "led_matrix_effects.inc"
 #undef LED_MATRIX_EFFECT
 
 #if defined(LED_MATRIX_CUSTOM_KB) || defined(LED_MATRIX_CUSTOM_USER)
@@ -469,9 +471,7 @@ bool led_matrix_get_suspend_state(void) { return suspend_state; }
 void led_matrix_toggle_eeprom_helper(bool write_to_eeprom) {
     led_matrix_eeconfig.enable ^= 1;
     led_task_state = STARTING;
-    if (write_to_eeprom) {
-        eeconfig_update_led_matrix();
-    }
+    led_eeconfig_update(write_to_eeprom);
     dprintf("led matrix toggle [%s]: led_matrix_eeconfig.enable = %u\n", (write_to_eeprom) ? "EEPROM" : "NOEEPROM", led_matrix_eeconfig.enable);
 }
 void led_matrix_toggle_noeeprom(void) { led_matrix_toggle_eeprom_helper(false); }
@@ -479,7 +479,7 @@ void led_matrix_toggle(void) { led_matrix_toggle_eeprom_helper(true); }
 
 void led_matrix_enable(void) {
     led_matrix_enable_noeeprom();
-    eeconfig_update_led_matrix();
+    led_eeconfig_update(true);
 }
 
 void led_matrix_enable_noeeprom(void) {
@@ -489,7 +489,7 @@ void led_matrix_enable_noeeprom(void) {
 
 void led_matrix_disable(void) {
     led_matrix_disable_noeeprom();
-    eeconfig_update_led_matrix();
+    led_eeconfig_update(true);
 }
 
 void led_matrix_disable_noeeprom(void) {
@@ -511,9 +511,7 @@ void led_matrix_mode_eeprom_helper(uint8_t mode, bool write_to_eeprom) {
         led_matrix_eeconfig.mode = mode;
     }
     led_task_state = STARTING;
-    if (write_to_eeprom) {
-        eeconfig_update_led_matrix();
-    }
+    led_eeconfig_update(write_to_eeprom);
     dprintf("led matrix mode [%s]: %u\n", (write_to_eeprom) ? "EEPROM" : "NOEEPROM", led_matrix_eeconfig.mode);
 }
 void led_matrix_mode_noeeprom(uint8_t mode) { led_matrix_mode_eeprom_helper(mode, false); }
@@ -540,9 +538,7 @@ void led_matrix_set_val_eeprom_helper(uint8_t val, bool write_to_eeprom) {
         return;
     }
     led_matrix_eeconfig.val = (val > LED_MATRIX_MAXIMUM_BRIGHTNESS) ? LED_MATRIX_MAXIMUM_BRIGHTNESS : val;
-    if (write_to_eeprom) {
-        eeconfig_update_led_matrix();
-    }
+    led_eeconfig_update(write_to_eeprom);
     dprintf("led matrix set val [%s]: %u\n", (write_to_eeprom) ? "EEPROM" : "NOEEPROM", led_matrix_eeconfig.val);
 }
 void led_matrix_set_val_noeeprom(uint8_t val) { led_matrix_set_val_eeprom_helper(val, false); }
@@ -560,9 +556,7 @@ void led_matrix_decrease_val(void) { led_matrix_decrease_val_helper(true); }
 
 void led_matrix_set_speed_eeprom_helper(uint8_t speed, bool write_to_eeprom) {
     led_matrix_eeconfig.speed = speed;
-    if (write_to_eeprom) {
-        eeconfig_update_led_matrix();
-    }
+    led_eeconfig_update(write_to_eeprom);
     dprintf("led matrix set speed [%s]: %u\n", (write_to_eeprom) ? "EEPROM" : "NOEEPROM", led_matrix_eeconfig.speed);
 }
 void led_matrix_set_speed_noeeprom(uint8_t speed) { led_matrix_set_speed_eeprom_helper(speed, false); }
diff --git a/quantum/led_matrix.h b/quantum/led_matrix/led_matrix.h
index 0984de73b..6f85854fb 100644
--- a/quantum/led_matrix.h
+++ b/quantum/led_matrix/led_matrix.h
@@ -56,7 +56,7 @@ enum led_matrix_effects {
 // --------------------------------------
 // -----Begin led effect enum macros-----
 #define LED_MATRIX_EFFECT(name, ...) LED_MATRIX_##name,
-#include "led_matrix_animations/led_matrix_effects.inc"
+#include "led_matrix_effects.inc"
 #undef LED_MATRIX_EFFECT
 
 #if defined(LED_MATRIX_CUSTOM_KB) || defined(LED_MATRIX_CUSTOM_USER)
diff --git a/quantum/led_matrix_drivers.c b/quantum/led_matrix/led_matrix_drivers.c
index 1d46b2c50..1d46b2c50 100644
--- a/quantum/led_matrix_drivers.c
+++ b/quantum/led_matrix/led_matrix_drivers.c
diff --git a/quantum/led_matrix_types.h b/quantum/led_matrix/led_matrix_types.h
index 61cdbd9b8..61cdbd9b8 100644
--- a/quantum/led_matrix_types.h
+++ b/quantum/led_matrix/led_matrix_types.h
diff --git a/quantum/led_matrix_animations/led_matrix_effects.inc b/quantum/led_matrix_animations/led_matrix_effects.inc
deleted file mode 100644
index 67237c568..000000000
--- a/quantum/led_matrix_animations/led_matrix_effects.inc
+++ /dev/null
@@ -1,18 +0,0 @@
-// Add your new core led matrix effect here, order determins enum order, requires "led_matrix_animations/ directory
-#include "led_matrix_animations/solid_anim.h"
-#include "led_matrix_animations/alpha_mods_anim.h"
-#include "led_matrix_animations/breathing_anim.h"
-#include "led_matrix_animations/band_anim.h"
-#include "led_matrix_animations/band_pinwheel_anim.h"
-#include "led_matrix_animations/band_spiral_anim.h"
-#include "led_matrix_animations/cycle_left_right_anim.h"
-#include "led_matrix_animations/cycle_up_down_anim.h"
-#include "led_matrix_animations/cycle_out_in_anim.h"
-#include "led_matrix_animations/dual_beacon_anim.h"
-#include "led_matrix_animations/solid_reactive_simple_anim.h"
-#include "led_matrix_animations/solid_reactive_wide.h"
-#include "led_matrix_animations/solid_reactive_cross.h"
-#include "led_matrix_animations/solid_reactive_nexus.h"
-#include "led_matrix_animations/solid_splash_anim.h"
-#include "led_matrix_animations/wave_left_right_anim.h"
-#include "led_matrix_animations/wave_up_down_anim.h"
diff --git a/quantum/matrix.c b/quantum/matrix.c
index 34d6af2e6..71ef27089 100644
--- a/quantum/matrix.c
+++ b/quantum/matrix.c
@@ -16,6 +16,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 #include <stdint.h>
 #include <stdbool.h>
+#include <string.h>
 #include "util.h"
 #include "matrix.h"
 #include "debounce.h"
@@ -24,14 +25,23 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifdef DIRECT_PINS
 static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
 #elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
+#    ifdef MATRIX_ROW_PINS
 static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
+#    endif  // MATRIX_ROW_PINS
+#    ifdef MATRIX_COL_PINS
 static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
+#    endif  // MATRIX_COL_PINS
 #endif
 
 /* matrix state(1:on, 0:off) */
 extern matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
 extern matrix_row_t matrix[MATRIX_ROWS];      // debounced values
 
+// user-defined overridable functions
+__attribute__((weak)) void matrix_init_pins(void);
+__attribute__((weak)) void matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
+__attribute__((weak)) void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
+
 static inline void setPinOutput_writeLow(pin_t pin) {
     ATOMIC_BLOCK_FORCEON {
         setPinOutput(pin);
@@ -47,7 +57,7 @@ static inline void setPinInputHigh_atomic(pin_t pin) {
 
 #ifdef DIRECT_PINS
 
-static void init_pins(void) {
+__attribute__((weak)) void matrix_init_pins(void) {
     for (int row = 0; row < MATRIX_ROWS; row++) {
         for (int col = 0; col < MATRIX_COLS; col++) {
             pin_t pin = direct_pins[row][col];
@@ -58,7 +68,7 @@ static void init_pins(void) {
     }
 }
 
-static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
+__attribute__((weak)) void matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
     // Start with a clear matrix row
     matrix_row_t current_row_value = 0;
 
@@ -69,16 +79,13 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
         }
     }
 
-    // If the row has changed, store the row and return the changed flag.
-    if (current_matrix[current_row] != current_row_value) {
-        current_matrix[current_row] = current_row_value;
-        return true;
-    }
-    return false;
+    // Update the matrix
+    current_matrix[current_row] = current_row_value;
 }
 
 #elif defined(DIODE_DIRECTION)
-#    if (DIODE_DIRECTION == COL2ROW)
+#    if defined(MATRIX_ROW_PINS) && defined(MATRIX_COL_PINS)
+#        if (DIODE_DIRECTION == COL2ROW)
 
 static void select_row(uint8_t row) { setPinOutput_writeLow(row_pins[row]); }
 
@@ -90,14 +97,14 @@ static void unselect_rows(void) {
     }
 }
 
-static void init_pins(void) {
+__attribute__((weak)) void matrix_init_pins(void) {
     unselect_rows();
     for (uint8_t x = 0; x < MATRIX_COLS; x++) {
         setPinInputHigh_atomic(col_pins[x]);
     }
 }
 
-static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
+__attribute__((weak)) void matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
     // Start with a clear matrix row
     matrix_row_t current_row_value = 0;
 
@@ -118,15 +125,11 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
     unselect_row(current_row);
     matrix_output_unselect_delay();  // wait for all Col signals to go HIGH
 
-    // If the row has changed, store the row and return the changed flag.
-    if (current_matrix[current_row] != current_row_value) {
-        current_matrix[current_row] = current_row_value;
-        return true;
-    }
-    return false;
+    // Update the matrix
+    current_matrix[current_row] = current_row_value;
 }
 
-#    elif (DIODE_DIRECTION == ROW2COL)
+#        elif (DIODE_DIRECTION == ROW2COL)
 
 static void select_col(uint8_t col) { setPinOutput_writeLow(col_pins[col]); }
 
@@ -138,59 +141,46 @@ static void unselect_cols(void) {
     }
 }
 
-static void init_pins(void) {
+__attribute__((weak)) void matrix_init_pins(void) {
     unselect_cols();
     for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
         setPinInputHigh_atomic(row_pins[x]);
     }
 }
 
-static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
-    bool matrix_changed = false;
-
+__attribute__((weak)) void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
     // Select col
     select_col(current_col);
     matrix_output_select_delay();
 
     // For each row...
     for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
-        // Store last value of row prior to reading
-        matrix_row_t last_row_value    = current_matrix[row_index];
-        matrix_row_t current_row_value = last_row_value;
-
         // Check row pin state
         if (readPin(row_pins[row_index]) == 0) {
             // Pin LO, set col bit
-            current_row_value |= (MATRIX_ROW_SHIFTER << current_col);
+            current_matrix[row_index] |= (MATRIX_ROW_SHIFTER << current_col);
         } else {
             // Pin HI, clear col bit
-            current_row_value &= ~(MATRIX_ROW_SHIFTER << current_col);
-        }
-
-        // Determine if the matrix changed state
-        if ((last_row_value != current_row_value)) {
-            matrix_changed |= true;
-            current_matrix[row_index] = current_row_value;
+            current_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << current_col);
         }
     }
 
     // Unselect col
     unselect_col(current_col);
     matrix_output_unselect_delay();  // wait for all Row signals to go HIGH
-
-    return matrix_changed;
 }
 
-#    else
-#        error DIODE_DIRECTION must be one of COL2ROW or ROW2COL!
-#    endif
+#        else
+#            error DIODE_DIRECTION must be one of COL2ROW or ROW2COL!
+#        endif
+#    endif  // defined(MATRIX_ROW_PINS) && defined(MATRIX_COL_PINS)
 #else
 #    error DIODE_DIRECTION is not defined!
 #endif
 
 void matrix_init(void) {
     // initialize key pins
-    init_pins();
+    matrix_init_pins();
 
     // initialize matrix state: all keys off
     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
@@ -204,20 +194,23 @@ void matrix_init(void) {
 }
 
 uint8_t matrix_scan(void) {
-    bool changed = false;
+    matrix_row_t curr_matrix[MATRIX_ROWS] = {0};
 
 #if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
     // Set row, read cols
     for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
-        changed |= read_cols_on_row(raw_matrix, current_row);
+        matrix_read_cols_on_row(curr_matrix, current_row);
     }
 #elif (DIODE_DIRECTION == ROW2COL)
     // Set col, read rows
     for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
-        changed |= read_rows_on_col(raw_matrix, current_col);
+        matrix_read_rows_on_col(curr_matrix, current_col);
     }
 #endif
 
+    bool changed = memcmp(raw_matrix, curr_matrix, sizeof(curr_matrix)) != 0;
+    if (changed) memcpy(raw_matrix, curr_matrix, sizeof(curr_matrix));
+
     debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
 
     matrix_scan_quantum();
diff --git a/quantum/mcu_selection.mk b/quantum/mcu_selection.mk
index 9268c4522..f8def7f67 100644
--- a/quantum/mcu_selection.mk
+++ b/quantum/mcu_selection.mk
@@ -136,10 +136,6 @@ ifneq ($(findstring STM32F042, $(MCU)),)
 
   USE_FPU ?= no
 
-  # Options to pass to dfu-util when flashing
-  DFU_ARGS ?= -d 0483:DF11 -a 0 -s 0x08000000:leave
-  DFU_SUFFIX_ARGS ?= -v 0483 -p DF11
-
   # UF2 settings
   UF2_FAMILY ?= STM32F0
 endif
@@ -172,10 +168,6 @@ ifneq ($(findstring STM32F072, $(MCU)),)
 
   USE_FPU ?= no
 
-  # Options to pass to dfu-util when flashing
-  DFU_ARGS ?= -d 0483:DF11 -a 0 -s 0x08000000:leave
-  DFU_SUFFIX_ARGS ?= -v 0483 -p DF11
-
   # UF2 settings
   UF2_FAMILY ?= STM32F0
 endif
@@ -208,10 +200,6 @@ ifneq ($(findstring STM32F103, $(MCU)),)
 
   USE_FPU ?= no
 
-  # Options to pass to dfu-util when flashing
-  DFU_ARGS ?= -d 0483:DF11 -a 0 -s 0x08000000:leave
-  DFU_SUFFIX_ARGS ?= -v 0483 -p DF11
-
   # UF2 settings
   UF2_FAMILY ?= STM32F1
 endif
@@ -244,10 +232,6 @@ ifneq ($(findstring STM32F303, $(MCU)),)
 
   USE_FPU ?= yes
 
-  # Options to pass to dfu-util when flashing
-  DFU_ARGS ?= -d 0483:DF11 -a 0 -s 0x08000000:leave
-  DFU_SUFFIX_ARGS ?= -v 0483 -p DF11
-
   # UF2 settings
   UF2_FAMILY ?= STM32F3
 endif
@@ -280,10 +264,6 @@ ifneq ($(findstring STM32F401, $(MCU)),)
 
   USE_FPU ?= yes
 
-  # Options to pass to dfu-util when flashing
-  DFU_ARGS ?= -d 0483:DF11 -a 0 -s 0x08000000:leave
-  DFU_SUFFIX_ARGS ?= -v 0483 -p DF11
-
   # UF2 settings
   UF2_FAMILY ?= STM32F4
 endif
@@ -321,10 +301,6 @@ ifneq ($(findstring STM32F411, $(MCU)),)
 
   USE_FPU ?= yes
 
-  # Options to pass to dfu-util when flashing
-  DFU_ARGS ?= -d 0483:DF11 -a 0 -s 0x08000000:leave
-  DFU_SUFFIX_ARGS ?= -v 0483 -p DF11
-
   # UF2 settings
   UF2_FAMILY ?= STM32F4
 endif
@@ -357,10 +333,6 @@ ifneq ($(findstring STM32F446, $(MCU)),)
   BOARD ?= GENERIC_STM32_F446XE
 
   USE_FPU ?= yes
-
-  # Options to pass to dfu-util when flashing
-  DFU_ARGS ?= -d 0483:DF11 -a 0 -s 0x08000000:leave
-  DFU_SUFFIX_ARGS ?= -v 0483 -p DF11
 endif
 
 ifneq ($(findstring STM32G431, $(MCU)),)
@@ -391,10 +363,6 @@ ifneq ($(findstring STM32G431, $(MCU)),)
 
   USE_FPU ?= yes
 
-  # Options to pass to dfu-util when flashing
-  DFU_ARGS ?= -d 0483:DF11 -a 0 -s 0x08000000:leave
-  DFU_SUFFIX_ARGS ?= -v 0483 -p DF11
-
   # UF2 settings
   UF2_FAMILY ?= STM32G4
 endif
@@ -427,10 +395,6 @@ ifneq ($(findstring STM32G474, $(MCU)),)
 
   USE_FPU ?= yes
 
-  # Options to pass to dfu-util when flashing
-  DFU_ARGS ?= -d 0483:DF11 -a 0 -s 0x08000000:leave
-  DFU_SUFFIX_ARGS ?= -v 0483 -p DF11
-
   # UF2 settings
   UF2_FAMILY ?= STM32G4
 endif
@@ -465,10 +429,6 @@ ifneq (,$(filter $(MCU),STM32L433 STM32L443))
 
   USE_FPU ?= yes
 
-  # Options to pass to dfu-util when flashing
-  DFU_ARGS ?= -d 0483:DF11 -a 0 -s 0x08000000:leave
-  DFU_SUFFIX_ARGS ?= -v 0483 -p DF11
-
   # UF2 settings
   UF2_FAMILY ?= STM32L4
 endif
diff --git a/quantum/process_keycode/process_rgb.c b/quantum/process_keycode/process_rgb.c
index 167c0c03c..b9fee1ca5 100644
--- a/quantum/process_keycode/process_rgb.c
+++ b/quantum/process_keycode/process_rgb.c
@@ -14,7 +14,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include "process_rgb.h"
-#include "rgb.h"
 
 typedef void (*rgb_func_pointer)(void);
 
diff --git a/quantum/quantum.h b/quantum/quantum.h
index e4a7c5723..66ba96fde 100644
--- a/quantum/quantum.h
+++ b/quantum/quantum.h
@@ -176,6 +176,10 @@ extern layer_state_t layer_state;
 #    include "oled_driver.h"
 #endif
 
+#ifdef ST7565_ENABLE
+#    include "st7565.h"
+#endif
+
 #ifdef DIP_SWITCH_ENABLE
 #    include "dip_switch.h"
 #endif
diff --git a/quantum/rgb_matrix_animations/alpha_mods_anim.h b/quantum/rgb_matrix/animations/alpha_mods_anim.h
index 426d88ef3..426d88ef3 100644
--- a/quantum/rgb_matrix_animations/alpha_mods_anim.h
+++ b/quantum/rgb_matrix/animations/alpha_mods_anim.h
diff --git a/quantum/rgb_matrix_animations/breathing_anim.h b/quantum/rgb_matrix/animations/breathing_anim.h
index 340bd93e5..340bd93e5 100644
--- a/quantum/rgb_matrix_animations/breathing_anim.h
+++ b/quantum/rgb_matrix/animations/breathing_anim.h
diff --git a/quantum/rgb_matrix_animations/colorband_pinwheel_sat_anim.h b/quantum/rgb_matrix/animations/colorband_pinwheel_sat_anim.h
index 3df3cfda7..3df3cfda7 100644
--- a/quantum/rgb_matrix_animations/colorband_pinwheel_sat_anim.h
+++ b/quantum/rgb_matrix/animations/colorband_pinwheel_sat_anim.h
diff --git a/quantum/rgb_matrix_animations/colorband_pinwheel_val_anim.h b/quantum/rgb_matrix/animations/colorband_pinwheel_val_anim.h
index 7d80074fd..7d80074fd 100644
--- a/quantum/rgb_matrix_animations/colorband_pinwheel_val_anim.h
+++ b/quantum/rgb_matrix/animations/colorband_pinwheel_val_anim.h
diff --git a/quantum/rgb_matrix_animations/colorband_sat_anim.h b/quantum/rgb_matrix/animations/colorband_sat_anim.h
index 35b830af6..35b830af6 100644
--- a/quantum/rgb_matrix_animations/colorband_sat_anim.h
+++ b/quantum/rgb_matrix/animations/colorband_sat_anim.h
diff --git a/quantum/rgb_matrix_animations/colorband_spiral_sat_anim.h b/quantum/rgb_matrix/animations/colorband_spiral_sat_anim.h
index 048157aa1..048157aa1 100644
--- a/quantum/rgb_matrix_animations/colorband_spiral_sat_anim.h
+++ b/quantum/rgb_matrix/animations/colorband_spiral_sat_anim.h
diff --git a/quantum/rgb_matrix_animations/colorband_spiral_val_anim.h b/quantum/rgb_matrix/animations/colorband_spiral_val_anim.h
index bff2da161..bff2da161 100644
--- a/quantum/rgb_matrix_animations/colorband_spiral_val_anim.h
+++ b/quantum/rgb_matrix/animations/colorband_spiral_val_anim.h
diff --git a/quantum/rgb_matrix_animations/colorband_val_anim.h b/quantum/rgb_matrix/animations/colorband_val_anim.h
index f1aaf1d06..f1aaf1d06 100644
--- a/quantum/rgb_matrix_animations/colorband_val_anim.h
+++ b/quantum/rgb_matrix/animations/colorband_val_anim.h
diff --git a/quantum/rgb_matrix_animations/cycle_all_anim.h b/quantum/rgb_matrix/animations/cycle_all_anim.h
index faf8598a3..faf8598a3 100644
--- a/quantum/rgb_matrix_animations/cycle_all_anim.h
+++ b/quantum/rgb_matrix/animations/cycle_all_anim.h
diff --git a/quantum/rgb_matrix_animations/cycle_left_right_anim.h b/quantum/rgb_matrix/animations/cycle_left_right_anim.h
index cf911eb93..cf911eb93 100644
--- a/quantum/rgb_matrix_animations/cycle_left_right_anim.h
+++ b/quantum/rgb_matrix/animations/cycle_left_right_anim.h
diff --git a/quantum/rgb_matrix_animations/cycle_out_in_anim.h b/quantum/rgb_matrix/animations/cycle_out_in_anim.h
index d66acd4b2..d66acd4b2 100644
--- a/quantum/rgb_matrix_animations/cycle_out_in_anim.h
+++ b/quantum/rgb_matrix/animations/cycle_out_in_anim.h
diff --git a/quantum/rgb_matrix_animations/cycle_out_in_dual_anim.h b/quantum/rgb_matrix/animations/cycle_out_in_dual_anim.h
index fe8396140..fe8396140 100644
--- a/quantum/rgb_matrix_animations/cycle_out_in_dual_anim.h
+++ b/quantum/rgb_matrix/animations/cycle_out_in_dual_anim.h
diff --git a/quantum/rgb_matrix_animations/cycle_pinwheel_anim.h b/quantum/rgb_matrix/animations/cycle_pinwheel_anim.h
index 779988709..779988709 100644
--- a/quantum/rgb_matrix_animations/cycle_pinwheel_anim.h
+++ b/quantum/rgb_matrix/animations/cycle_pinwheel_anim.h
diff --git a/quantum/rgb_matrix_animations/cycle_spiral_anim.h b/quantum/rgb_matrix/animations/cycle_spiral_anim.h
index 80cfb0dbc..80cfb0dbc 100644
--- a/quantum/rgb_matrix_animations/cycle_spiral_anim.h
+++ b/quantum/rgb_matrix/animations/cycle_spiral_anim.h
diff --git a/quantum/rgb_matrix_animations/cycle_up_down_anim.h b/quantum/rgb_matrix/animations/cycle_up_down_anim.h
index 5016f739d..5016f739d 100644
--- a/quantum/rgb_matrix_animations/cycle_up_down_anim.h
+++ b/quantum/rgb_matrix/animations/cycle_up_down_anim.h
diff --git a/quantum/rgb_matrix_animations/digital_rain_anim.h b/quantum/rgb_matrix/animations/digital_rain_anim.h
index 1de45f8e8..1de45f8e8 100644
--- a/quantum/rgb_matrix_animations/digital_rain_anim.h
+++ b/quantum/rgb_matrix/animations/digital_rain_anim.h
diff --git a/quantum/rgb_matrix_animations/dual_beacon_anim.h b/quantum/rgb_matrix/animations/dual_beacon_anim.h
index ce9487168..ce9487168 100644
--- a/quantum/rgb_matrix_animations/dual_beacon_anim.h
+++ b/quantum/rgb_matrix/animations/dual_beacon_anim.h
diff --git a/quantum/rgb_matrix_animations/gradient_left_right_anim.h b/quantum/rgb_matrix/animations/gradient_left_right_anim.h
index 53dfd04e2..53dfd04e2 100644
--- a/quantum/rgb_matrix_animations/gradient_left_right_anim.h
+++ b/quantum/rgb_matrix/animations/gradient_left_right_anim.h
diff --git a/quantum/rgb_matrix_animations/gradient_up_down_anim.h b/quantum/rgb_matrix/animations/gradient_up_down_anim.h
index 7e0d2898c..7e0d2898c 100644
--- a/quantum/rgb_matrix_animations/gradient_up_down_anim.h
+++ b/quantum/rgb_matrix/animations/gradient_up_down_anim.h
diff --git a/quantum/rgb_matrix_animations/hue_breathing_anim.h b/quantum/rgb_matrix/animations/hue_breathing_anim.h
index 54dea958a..54dea958a 100644
--- a/quantum/rgb_matrix_animations/hue_breathing_anim.h
+++ b/quantum/rgb_matrix/animations/hue_breathing_anim.h
diff --git a/quantum/rgb_matrix_animations/hue_pendulum_anim.h b/quantum/rgb_matrix/animations/hue_pendulum_anim.h
index 2d8d36174..2d8d36174 100644
--- a/quantum/rgb_matrix_animations/hue_pendulum_anim.h
+++ b/quantum/rgb_matrix/animations/hue_pendulum_anim.h
diff --git a/quantum/rgb_matrix_animations/hue_wave_anim.h b/quantum/rgb_matrix/animations/hue_wave_anim.h
index fd9026fc9..fd9026fc9 100644
--- a/quantum/rgb_matrix_animations/hue_wave_anim.h
+++ b/quantum/rgb_matrix/animations/hue_wave_anim.h
diff --git a/quantum/rgb_matrix_animations/jellybean_raindrops_anim.h b/quantum/rgb_matrix/animations/jellybean_raindrops_anim.h
index 9493b3850..a17e954b1 100644
--- a/quantum/rgb_matrix_animations/jellybean_raindrops_anim.h
+++ b/quantum/rgb_matrix/animations/jellybean_raindrops_anim.h
@@ -4,7 +4,7 @@ RGB_MATRIX_EFFECT(JELLYBEAN_RAINDROPS)
 
 static void jellybean_raindrops_set_color(int i, effect_params_t* params) {
     if (!HAS_ANY_FLAGS(g_led_config.flags[i], params->flags)) return;
-    HSV hsv = {rand() & 0xFF, rand() & 0xFF, rgb_matrix_config.hsv.v};
+    HSV hsv = {rand() & 0xFF, qadd8(rand() & 0x7F, 0x80), rgb_matrix_config.hsv.v};
     RGB rgb = rgb_matrix_hsv_to_rgb(hsv);
     rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
 }
diff --git a/quantum/rgb_matrix_animations/rainbow_beacon_anim.h b/quantum/rgb_matrix/animations/rainbow_beacon_anim.h
index 977261182..977261182 100644
--- a/quantum/rgb_matrix_animations/rainbow_beacon_anim.h
+++ b/quantum/rgb_matrix/animations/rainbow_beacon_anim.h
diff --git a/quantum/rgb_matrix_animations/rainbow_moving_chevron_anim.h b/quantum/rgb_matrix/animations/rainbow_moving_chevron_anim.h
index e51e7b251..e51e7b251 100644
--- a/quantum/rgb_matrix_animations/rainbow_moving_chevron_anim.h
+++ b/quantum/rgb_matrix/animations/rainbow_moving_chevron_anim.h
diff --git a/quantum/rgb_matrix_animations/rainbow_pinwheels_anim.h b/quantum/rgb_matrix/animations/rainbow_pinwheels_anim.h
index 1cd4ed2ac..1cd4ed2ac 100644
--- a/quantum/rgb_matrix_animations/rainbow_pinwheels_anim.h
+++ b/quantum/rgb_matrix/animations/rainbow_pinwheels_anim.h
diff --git a/quantum/rgb_matrix_animations/raindrops_anim.h b/quantum/rgb_matrix/animations/raindrops_anim.h
index 38359cdca..38359cdca 100644
--- a/quantum/rgb_matrix_animations/raindrops_anim.h
+++ b/quantum/rgb_matrix/animations/raindrops_anim.h
diff --git a/quantum/rgb_matrix/animations/rgb_matrix_effects.inc b/quantum/rgb_matrix/animations/rgb_matrix_effects.inc
new file mode 100644
index 000000000..302ad79c0
--- /dev/null
+++ b/quantum/rgb_matrix/animations/rgb_matrix_effects.inc
@@ -0,0 +1,37 @@
+// Add your new core rgb matrix effect here, order determines enum order
+#include "solid_color_anim.h"
+#include "alpha_mods_anim.h"
+#include "gradient_up_down_anim.h"
+#include "gradient_left_right_anim.h"
+#include "breathing_anim.h"
+#include "colorband_sat_anim.h"
+#include "colorband_val_anim.h"
+#include "colorband_pinwheel_sat_anim.h"
+#include "colorband_pinwheel_val_anim.h"
+#include "colorband_spiral_sat_anim.h"
+#include "colorband_spiral_val_anim.h"
+#include "cycle_all_anim.h"
+#include "cycle_left_right_anim.h"
+#include "cycle_up_down_anim.h"
+#include "rainbow_moving_chevron_anim.h"
+#include "cycle_out_in_anim.h"
+#include "cycle_out_in_dual_anim.h"
+#include "cycle_pinwheel_anim.h"
+#include "cycle_spiral_anim.h"
+#include "dual_beacon_anim.h"
+#include "rainbow_beacon_anim.h"
+#include "rainbow_pinwheels_anim.h"
+#include "raindrops_anim.h"
+#include "jellybean_raindrops_anim.h"
+#include "hue_breathing_anim.h"
+#include "hue_pendulum_anim.h"
+#include "hue_wave_anim.h"
+#include "typing_heatmap_anim.h"
+#include "digital_rain_anim.h"
+#include "solid_reactive_simple_anim.h"
+#include "solid_reactive_anim.h"
+#include "solid_reactive_wide.h"
+#include "solid_reactive_cross.h"
+#include "solid_reactive_nexus.h"
+#include "splash_anim.h"
+#include "solid_splash_anim.h"
diff --git a/quantum/rgb_matrix_runners/effect_runner_dx_dy.h b/quantum/rgb_matrix/animations/runners/effect_runner_dx_dy.h
index 4867609c8..4867609c8 100644
--- a/quantum/rgb_matrix_runners/effect_runner_dx_dy.h
+++ b/quantum/rgb_matrix/animations/runners/effect_runner_dx_dy.h
diff --git a/quantum/rgb_matrix_runners/effect_runner_dx_dy_dist.h b/quantum/rgb_matrix/animations/runners/effect_runner_dx_dy_dist.h
index 9545b418d..9545b418d 100644
--- a/quantum/rgb_matrix_runners/effect_runner_dx_dy_dist.h
+++ b/quantum/rgb_matrix/animations/runners/effect_runner_dx_dy_dist.h
diff --git a/quantum/rgb_matrix_runners/effect_runner_i.h b/quantum/rgb_matrix/animations/runners/effect_runner_i.h
index 1881cd6c6..1881cd6c6 100644
--- a/quantum/rgb_matrix_runners/effect_runner_i.h
+++ b/quantum/rgb_matrix/animations/runners/effect_runner_i.h
diff --git a/quantum/rgb_matrix_runners/effect_runner_reactive.h b/quantum/rgb_matrix/animations/runners/effect_runner_reactive.h
index 75b7c0df4..75b7c0df4 100644
--- a/quantum/rgb_matrix_runners/effect_runner_reactive.h
+++ b/quantum/rgb_matrix/animations/runners/effect_runner_reactive.h
diff --git a/quantum/rgb_matrix_runners/effect_runner_reactive_splash.h b/quantum/rgb_matrix/animations/runners/effect_runner_reactive_splash.h
index 2e46ffb35..2e46ffb35 100644
--- a/quantum/rgb_matrix_runners/effect_runner_reactive_splash.h
+++ b/quantum/rgb_matrix/animations/runners/effect_runner_reactive_splash.h
diff --git a/quantum/rgb_matrix_runners/effect_runner_sin_cos_i.h b/quantum/rgb_matrix/animations/runners/effect_runner_sin_cos_i.h
index 02351de51..02351de51 100644
--- a/quantum/rgb_matrix_runners/effect_runner_sin_cos_i.h
+++ b/quantum/rgb_matrix/animations/runners/effect_runner_sin_cos_i.h
diff --git a/quantum/rgb_matrix/animations/runners/rgb_matrix_runners.inc b/quantum/rgb_matrix/animations/runners/rgb_matrix_runners.inc
new file mode 100644
index 000000000..c09022bb0
--- /dev/null
+++ b/quantum/rgb_matrix/animations/runners/rgb_matrix_runners.inc
@@ -0,0 +1,6 @@
+#include "effect_runner_dx_dy_dist.h"
+#include "effect_runner_dx_dy.h"
+#include "effect_runner_i.h"
+#include "effect_runner_sin_cos_i.h"
+#include "effect_runner_reactive.h"
+#include "effect_runner_reactive_splash.h"
diff --git a/quantum/rgb_matrix_animations/solid_color_anim.h b/quantum/rgb_matrix/animations/solid_color_anim.h
index 79d63cf13..79d63cf13 100644
--- a/quantum/rgb_matrix_animations/solid_color_anim.h
+++ b/quantum/rgb_matrix/animations/solid_color_anim.h
diff --git a/quantum/rgb_matrix_animations/solid_reactive_anim.h b/quantum/rgb_matrix/animations/solid_reactive_anim.h
index d45bb961b..d45bb961b 100644
--- a/quantum/rgb_matrix_animations/solid_reactive_anim.h
+++ b/quantum/rgb_matrix/animations/solid_reactive_anim.h
diff --git a/quantum/rgb_matrix_animations/solid_reactive_cross.h b/quantum/rgb_matrix/animations/solid_reactive_cross.h
index f76c68e8c..f76c68e8c 100644
--- a/quantum/rgb_matrix_animations/solid_reactive_cross.h
+++ b/quantum/rgb_matrix/animations/solid_reactive_cross.h
diff --git a/quantum/rgb_matrix_animations/solid_reactive_nexus.h b/quantum/rgb_matrix/animations/solid_reactive_nexus.h
index 17f94e3c1..17f94e3c1 100644
--- a/quantum/rgb_matrix_animations/solid_reactive_nexus.h
+++ b/quantum/rgb_matrix/animations/solid_reactive_nexus.h
diff --git a/quantum/rgb_matrix_animations/solid_reactive_simple_anim.h b/quantum/rgb_matrix/animations/solid_reactive_simple_anim.h
index 12eb248cc..12eb248cc 100644
--- a/quantum/rgb_matrix_animations/solid_reactive_simple_anim.h
+++ b/quantum/rgb_matrix/animations/solid_reactive_simple_anim.h
diff --git a/quantum/rgb_matrix_animations/solid_reactive_wide.h b/quantum/rgb_matrix/animations/solid_reactive_wide.h
index 1cc4dca72..1cc4dca72 100644
--- a/quantum/rgb_matrix_animations/solid_reactive_wide.h
+++ b/quantum/rgb_matrix/animations/solid_reactive_wide.h
diff --git a/quantum/rgb_matrix_animations/solid_splash_anim.h b/quantum/rgb_matrix/animations/solid_splash_anim.h
index 99efb4996..99efb4996 100644
--- a/quantum/rgb_matrix_animations/solid_splash_anim.h
+++ b/quantum/rgb_matrix/animations/solid_splash_anim.h
diff --git a/quantum/rgb_matrix_animations/splash_anim.h b/quantum/rgb_matrix/animations/splash_anim.h
index 1415bcc0f..1415bcc0f 100644
--- a/quantum/rgb_matrix_animations/splash_anim.h
+++ b/quantum/rgb_matrix/animations/splash_anim.h
diff --git a/quantum/rgb_matrix_animations/typing_heatmap_anim.h b/quantum/rgb_matrix/animations/typing_heatmap_anim.h
index e7dda11a2..e7dda11a2 100644
--- a/quantum/rgb_matrix_animations/typing_heatmap_anim.h
+++ b/quantum/rgb_matrix/animations/typing_heatmap_anim.h
diff --git a/quantum/rgb_matrix.c b/quantum/rgb_matrix/rgb_matrix.c
index ab8dbd849..789cd2860 100644
--- a/quantum/rgb_matrix.c
+++ b/quantum/rgb_matrix/rgb_matrix.c
@@ -31,22 +31,25 @@ const led_point_t k_rgb_matrix_center = {112, 32};
 const led_point_t k_rgb_matrix_center = RGB_MATRIX_CENTER;
 #endif
 
+// clang-format off
+#ifndef RGB_MATRIX_IMMEDIATE_EEPROM
+#    define rgb_eeconfig_update(v) rgb_update_eeprom |= v
+#else
+#    define rgb_eeconfig_update(v) if (v) eeconfig_update_rgb_matrix()
+#endif
+// clang-format on
+
 __attribute__((weak)) RGB rgb_matrix_hsv_to_rgb(HSV hsv) { return hsv_to_rgb(hsv); }
 
 // Generic effect runners
-#include "rgb_matrix_runners/effect_runner_dx_dy_dist.h"
-#include "rgb_matrix_runners/effect_runner_dx_dy.h"
-#include "rgb_matrix_runners/effect_runner_i.h"
-#include "rgb_matrix_runners/effect_runner_sin_cos_i.h"
-#include "rgb_matrix_runners/effect_runner_reactive.h"
-#include "rgb_matrix_runners/effect_runner_reactive_splash.h"
+#include "rgb_matrix_runners.inc"
 
 // ------------------------------------------
 // -----Begin rgb effect includes macros-----
 #define RGB_MATRIX_EFFECT(name)
 #define RGB_MATRIX_CUSTOM_EFFECT_IMPLS
 
-#include "rgb_matrix_animations/rgb_matrix_effects.inc"
+#include "rgb_matrix_effects.inc"
 #ifdef RGB_MATRIX_CUSTOM_KB
 #    include "rgb_matrix_kb.inc"
 #endif
@@ -67,10 +70,6 @@ __attribute__((weak)) RGB rgb_matrix_hsv_to_rgb(HSV hsv) { return hsv_to_rgb(hsv
 #    define RGB_DISABLE_TIMEOUT 0
 #endif
 
-#if RGB_DISABLE_WHEN_USB_SUSPENDED != 1
-#    undef RGB_DISABLE_WHEN_USB_SUSPENDED
-#endif
-
 #if !defined(RGB_MATRIX_MAXIMUM_BRIGHTNESS) || RGB_MATRIX_MAXIMUM_BRIGHTNESS > UINT8_MAX
 #    undef RGB_MATRIX_MAXIMUM_BRIGHTNESS
 #    define RGB_MATRIX_MAXIMUM_BRIGHTNESS UINT8_MAX
@@ -129,6 +128,7 @@ last_hit_t g_last_hit_tracker;
 
 // internals
 static bool            suspend_state     = false;
+static bool            rgb_update_eeprom = false;
 static uint8_t         rgb_last_enable   = UINT8_MAX;
 static uint8_t         rgb_last_effect   = UINT8_MAX;
 static effect_params_t rgb_effect_params = {0, LED_FLAG_ALL, false};
@@ -315,6 +315,8 @@ static void rgb_task_timers(void) {
 
 static void rgb_task_sync(void) {
     // next task
+    if (rgb_update_eeprom) eeconfig_update_rgb_matrix();
+    rgb_update_eeprom = false;
     if (sync_timer_elapsed32(g_rgb_timer) >= RGB_MATRIX_LED_FLUSH_LIMIT) rgb_task_state = STARTING;
 }
 
@@ -353,7 +355,7 @@ static void rgb_task_render(uint8_t effect) {
     case RGB_MATRIX_##name:                   \
         rendering = name(&rgb_effect_params); \
         break;
-#include "rgb_matrix_animations/rgb_matrix_effects.inc"
+#include "rgb_matrix_effects.inc"
 #undef RGB_MATRIX_EFFECT
 
 #if defined(RGB_MATRIX_CUSTOM_KB) || defined(RGB_MATRIX_CUSTOM_USER)
@@ -511,9 +513,7 @@ bool rgb_matrix_get_suspend_state(void) { return suspend_state; }
 void rgb_matrix_toggle_eeprom_helper(bool write_to_eeprom) {
     rgb_matrix_config.enable ^= 1;
     rgb_task_state = STARTING;
-    if (write_to_eeprom) {
-        eeconfig_update_rgb_matrix();
-    }
+    rgb_eeconfig_update(write_to_eeprom);
     dprintf("rgb matrix toggle [%s]: rgb_matrix_config.enable = %u\n", (write_to_eeprom) ? "EEPROM" : "NOEEPROM", rgb_matrix_config.enable);
 }
 void rgb_matrix_toggle_noeeprom(void) { rgb_matrix_toggle_eeprom_helper(false); }
@@ -521,7 +521,7 @@ void rgb_matrix_toggle(void) { rgb_matrix_toggle_eeprom_helper(true); }
 
 void rgb_matrix_enable(void) {
     rgb_matrix_enable_noeeprom();
-    eeconfig_update_rgb_matrix();
+    rgb_eeconfig_update(true);
 }
 
 void rgb_matrix_enable_noeeprom(void) {
@@ -531,7 +531,7 @@ void rgb_matrix_enable_noeeprom(void) {
 
 void rgb_matrix_disable(void) {
     rgb_matrix_disable_noeeprom();
-    eeconfig_update_rgb_matrix();
+    rgb_eeconfig_update(true);
 }
 
 void rgb_matrix_disable_noeeprom(void) {
@@ -553,9 +553,7 @@ void rgb_matrix_mode_eeprom_helper(uint8_t mode, bool write_to_eeprom) {
         rgb_matrix_config.mode = mode;
     }
     rgb_task_state = STARTING;
-    if (write_to_eeprom) {
-        eeconfig_update_rgb_matrix();
-    }
+    rgb_eeconfig_update(write_to_eeprom);
     dprintf("rgb matrix mode [%s]: %u\n", (write_to_eeprom) ? "EEPROM" : "NOEEPROM", rgb_matrix_config.mode);
 }
 void rgb_matrix_mode_noeeprom(uint8_t mode) { rgb_matrix_mode_eeprom_helper(mode, false); }
@@ -584,9 +582,7 @@ void rgb_matrix_sethsv_eeprom_helper(uint16_t hue, uint8_t sat, uint8_t val, boo
     rgb_matrix_config.hsv.h = hue;
     rgb_matrix_config.hsv.s = sat;
     rgb_matrix_config.hsv.v = (val > RGB_MATRIX_MAXIMUM_BRIGHTNESS) ? RGB_MATRIX_MAXIMUM_BRIGHTNESS : val;
-    if (write_to_eeprom) {
-        eeconfig_update_rgb_matrix();
-    }
+    rgb_eeconfig_update(write_to_eeprom);
     dprintf("rgb matrix set hsv [%s]: %u,%u,%u\n", (write_to_eeprom) ? "EEPROM" : "NOEEPROM", rgb_matrix_config.hsv.h, rgb_matrix_config.hsv.s, rgb_matrix_config.hsv.v);
 }
 void rgb_matrix_sethsv_noeeprom(uint16_t hue, uint8_t sat, uint8_t val) { rgb_matrix_sethsv_eeprom_helper(hue, sat, val, false); }
@@ -623,9 +619,7 @@ void rgb_matrix_decrease_val(void) { rgb_matrix_decrease_val_helper(true); }
 
 void rgb_matrix_set_speed_eeprom_helper(uint8_t speed, bool write_to_eeprom) {
     rgb_matrix_config.speed = speed;
-    if (write_to_eeprom) {
-        eeconfig_update_rgb_matrix();
-    }
+    rgb_eeconfig_update(write_to_eeprom);
     dprintf("rgb matrix set speed [%s]: %u\n", (write_to_eeprom) ? "EEPROM" : "NOEEPROM", rgb_matrix_config.speed);
 }
 void rgb_matrix_set_speed_noeeprom(uint8_t speed) { rgb_matrix_set_speed_eeprom_helper(speed, false); }
diff --git a/quantum/rgb_matrix.h b/quantum/rgb_matrix/rgb_matrix.h
index a615b8422..28f07c84d 100644
--- a/quantum/rgb_matrix.h
+++ b/quantum/rgb_matrix/rgb_matrix.h
@@ -33,6 +33,8 @@
 #    include "is31fl3737.h"
 #elif defined(IS31FL3741)
 #    include "is31fl3741.h"
+#elif defined(AW20216)
+#    include "aw20216.h"
 #elif defined(WS2812)
 #    include "ws2812.h"
 #endif
@@ -70,7 +72,7 @@ enum rgb_matrix_effects {
 // --------------------------------------
 // -----Begin rgb effect enum macros-----
 #define RGB_MATRIX_EFFECT(name, ...) RGB_MATRIX_##name,
-#include "rgb_matrix_animations/rgb_matrix_effects.inc"
+#include "rgb_matrix_effects.inc"
 #undef RGB_MATRIX_EFFECT
 
 #if defined(RGB_MATRIX_CUSTOM_KB) || defined(RGB_MATRIX_CUSTOM_USER)
diff --git a/quantum/rgb_matrix_drivers.c b/quantum/rgb_matrix/rgb_matrix_drivers.c
index 896fa6d0e..6a11d4791 100644
--- a/quantum/rgb_matrix_drivers.c
+++ b/quantum/rgb_matrix/rgb_matrix_drivers.c
@@ -171,6 +171,22 @@ const rgb_matrix_driver_t rgb_matrix_driver = {
 };
 #    endif
 
+#elif defined(AW20216)
+#    include "spi_master.h"
+static void init(void) {
+    spi_init();
+    AW20216_init();
+}
+
+static void flush(void) { AW20216_update_pwm_buffers(); }
+
+const rgb_matrix_driver_t rgb_matrix_driver = {
+    .init          = init,
+    .flush         = flush,
+    .set_color     = AW20216_set_color,
+    .set_color_all = AW20216_set_color_all,
+};
+
 #elif defined(WS2812)
 #    if defined(RGBLIGHT_ENABLE) && !defined(RGBLIGHT_CUSTOM_DRIVER)
 #        pragma message "Cannot use RGBLIGHT and RGB Matrix using WS2812 at the same time."
diff --git a/quantum/rgb_matrix_types.h b/quantum/rgb_matrix/rgb_matrix_types.h
index df575d657..df575d657 100644
--- a/quantum/rgb_matrix_types.h
+++ b/quantum/rgb_matrix/rgb_matrix_types.h
diff --git a/quantum/rgb_matrix_animations/rgb_matrix_effects.inc b/quantum/rgb_matrix_animations/rgb_matrix_effects.inc
deleted file mode 100644
index 053d44150..000000000
--- a/quantum/rgb_matrix_animations/rgb_matrix_effects.inc
+++ /dev/null
@@ -1,37 +0,0 @@
-// Add your new core rgb matrix effect here, order determins enum order, requires "rgb_matrix_animations/ directory
-#include "rgb_matrix_animations/solid_color_anim.h"
-#include "rgb_matrix_animations/alpha_mods_anim.h"
-#include "rgb_matrix_animations/gradient_up_down_anim.h"
-#include "rgb_matrix_animations/gradient_left_right_anim.h"
-#include "rgb_matrix_animations/breathing_anim.h"
-#include "rgb_matrix_animations/colorband_sat_anim.h"
-#include "rgb_matrix_animations/colorband_val_anim.h"
-#include "rgb_matrix_animations/colorband_pinwheel_sat_anim.h"
-#include "rgb_matrix_animations/colorband_pinwheel_val_anim.h"
-#include "rgb_matrix_animations/colorband_spiral_sat_anim.h"
-#include "rgb_matrix_animations/colorband_spiral_val_anim.h"
-#include "rgb_matrix_animations/cycle_all_anim.h"
-#include "rgb_matrix_animations/cycle_left_right_anim.h"
-#include "rgb_matrix_animations/cycle_up_down_anim.h"
-#include "rgb_matrix_animations/rainbow_moving_chevron_anim.h"
-#include "rgb_matrix_animations/cycle_out_in_anim.h"
-#include "rgb_matrix_animations/cycle_out_in_dual_anim.h"
-#include "rgb_matrix_animations/cycle_pinwheel_anim.h"
-#include "rgb_matrix_animations/cycle_spiral_anim.h"
-#include "rgb_matrix_animations/dual_beacon_anim.h"
-#include "rgb_matrix_animations/rainbow_beacon_anim.h"
-#include "rgb_matrix_animations/rainbow_pinwheels_anim.h"
-#include "rgb_matrix_animations/raindrops_anim.h"
-#include "rgb_matrix_animations/jellybean_raindrops_anim.h"
-#include "rgb_matrix_animations/hue_breathing_anim.h"
-#include "rgb_matrix_animations/hue_pendulum_anim.h"
-#include "rgb_matrix_animations/hue_wave_anim.h"
-#include "rgb_matrix_animations/typing_heatmap_anim.h"
-#include "rgb_matrix_animations/digital_rain_anim.h"
-#include "rgb_matrix_animations/solid_reactive_simple_anim.h"
-#include "rgb_matrix_animations/solid_reactive_anim.h"
-#include "rgb_matrix_animations/solid_reactive_wide.h"
-#include "rgb_matrix_animations/solid_reactive_cross.h"
-#include "rgb_matrix_animations/solid_reactive_nexus.h"
-#include "rgb_matrix_animations/splash_anim.h"
-#include "rgb_matrix_animations/solid_splash_anim.h"
diff --git a/quantum/serial_link/system/serial_link.c b/quantum/serial_link/system/serial_link.c
index f77483ad8..6363f8ff3 100644
--- a/quantum/serial_link/system/serial_link.c
+++ b/quantum/serial_link/system/serial_link.c
@@ -29,10 +29,13 @@ SOFTWARE.
 #include "serial_link/protocol/transport.h"
 #include "serial_link/protocol/frame_router.h"
 #include "matrix.h"
+#include "sync_timer.h"
 #include <stdbool.h>
 #include "print.h"
 #include "config.h"
 
+#define SYNC_TIMER_OFFSET 2
+
 static event_source_t new_data_event;
 static bool           serial_link_connected;
 static bool           is_master = false;
@@ -159,10 +162,16 @@ static matrix_object_t last_matrix = {};
 
 SLAVE_TO_MASTER_OBJECT(keyboard_matrix, matrix_object_t);
 MASTER_TO_ALL_SLAVES_OBJECT(serial_link_connected, bool);
+#ifndef DISABLE_SYNC_TIMER
+MASTER_TO_ALL_SLAVES_OBJECT(sync_timer, uint32_t);
+#endif
 
 static remote_object_t* remote_objects[] = {
     REMOTE_OBJECT(serial_link_connected),
     REMOTE_OBJECT(keyboard_matrix),
+#ifndef DISABLE_SYNC_TIMER
+    REMOTE_OBJECT(sync_timer),
+#endif
 };
 
 void init_serial_link(void) {
@@ -200,14 +209,27 @@ void serial_link_update(void) {
             m->rows[i] = matrix.rows[i];
         }
         end_write_keyboard_matrix();
+
         *begin_write_serial_link_connected() = true;
         end_write_serial_link_connected();
+
+#ifndef DISABLE_SYNC_TIMER
+        *begin_write_sync_timer() = sync_timer_read32() + SYNC_TIMER_OFFSET;
+        end_write_sync_timer();
+#endif
     }
 
     matrix_object_t* m = read_keyboard_matrix(0);
     if (m) {
         matrix_set_remote(m->rows, 0);
     }
+
+#ifndef DISABLE_SYNC_TIMER
+    uint32_t* t = read_sync_timer();
+    if (t) {
+        sync_timer_update(*t);
+    }
+#endif
 }
 
 void signal_data_written(void) { chEvtBroadcast(&new_data_event); }
diff --git a/quantum/split_common/matrix.c b/quantum/split_common/matrix.c
index 039e7d977..56d91b07f 100644
--- a/quantum/split_common/matrix.c
+++ b/quantum/split_common/matrix.c
@@ -16,23 +16,30 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 #include <stdint.h>
 #include <stdbool.h>
+#include <string.h>
 #include "util.h"
 #include "matrix.h"
 #include "debounce.h"
 #include "quantum.h"
 #include "split_util.h"
 #include "config.h"
-#include "transport.h"
+#include "transactions.h"
 
-#define ERROR_DISCONNECT_COUNT 5
+#ifndef ERROR_DISCONNECT_COUNT
+#    define ERROR_DISCONNECT_COUNT 5
+#endif  // ERROR_DISCONNECT_COUNT
 
 #define ROWS_PER_HAND (MATRIX_ROWS / 2)
 
 #ifdef DIRECT_PINS
 static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
 #elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
+#    ifdef MATRIX_ROW_PINS
 static pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
+#    endif  // MATRIX_ROW_PINS
+#    ifdef MATRIX_COL_PINS
 static pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
+#    endif  // MATRIX_COL_PINS
 #endif
 
 /* matrix state(1:on, 0:off) */
@@ -45,6 +52,9 @@ uint8_t thisHand, thatHand;
 // user-defined overridable functions
 __attribute__((weak)) void matrix_slave_scan_kb(void) { matrix_slave_scan_user(); }
 __attribute__((weak)) void matrix_slave_scan_user(void) {}
+__attribute__((weak)) void matrix_init_pins(void);
+__attribute__((weak)) void matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
+__attribute__((weak)) void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
 
 static inline void setPinOutput_writeLow(pin_t pin) {
     ATOMIC_BLOCK_FORCEON {
@@ -61,7 +71,7 @@ static inline void setPinInputHigh_atomic(pin_t pin) {
 
 #ifdef DIRECT_PINS
 
-static void init_pins(void) {
+__attribute__((weak)) void matrix_init_pins(void) {
     for (int row = 0; row < MATRIX_ROWS; row++) {
         for (int col = 0; col < MATRIX_COLS; col++) {
             pin_t pin = direct_pins[row][col];
@@ -72,7 +82,7 @@ static void init_pins(void) {
     }
 }
 
-static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
+__attribute__((weak)) void matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
     // Start with a clear matrix row
     matrix_row_t current_row_value = 0;
 
@@ -83,16 +93,13 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
         }
     }
 
-    // If the row has changed, store the row and return the changed flag.
-    if (current_matrix[current_row] != current_row_value) {
-        current_matrix[current_row] = current_row_value;
-        return true;
-    }
-    return false;
+    // Update the matrix
+    current_matrix[current_row] = current_row_value;
 }
 
 #elif defined(DIODE_DIRECTION)
-#    if (DIODE_DIRECTION == COL2ROW)
+#    if defined(MATRIX_ROW_PINS) && defined(MATRIX_COL_PINS)
+#        if (DIODE_DIRECTION == COL2ROW)
 
 static void select_row(uint8_t row) { setPinOutput_writeLow(row_pins[row]); }
 
@@ -104,14 +111,14 @@ static void unselect_rows(void) {
     }
 }
 
-static void init_pins(void) {
+__attribute__((weak)) void matrix_init_pins(void) {
     unselect_rows();
     for (uint8_t x = 0; x < MATRIX_COLS; x++) {
         setPinInputHigh_atomic(col_pins[x]);
     }
 }
 
-static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
+__attribute__((weak)) void matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
     // Start with a clear matrix row
     matrix_row_t current_row_value = 0;
 
@@ -132,15 +139,11 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
     unselect_row(current_row);
     matrix_output_unselect_delay();  // wait for all Col signals to go HIGH
 
-    // If the row has changed, store the row and return the changed flag.
-    if (current_matrix[current_row] != current_row_value) {
-        current_matrix[current_row] = current_row_value;
-        return true;
-    }
-    return false;
+    // Update the matrix
+    current_matrix[current_row] = current_row_value;
 }
 
-#    elif (DIODE_DIRECTION == ROW2COL)
+#        elif (DIODE_DIRECTION == ROW2COL)
 
 static void select_col(uint8_t col) { setPinOutput_writeLow(col_pins[col]); }
 
@@ -152,52 +155,39 @@ static void unselect_cols(void) {
     }
 }
 
-static void init_pins(void) {
+__attribute__((weak)) void matrix_init_pins(void) {
     unselect_cols();
     for (uint8_t x = 0; x < ROWS_PER_HAND; x++) {
         setPinInputHigh_atomic(row_pins[x]);
     }
 }
 
-static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
-    bool matrix_changed = false;
-
+__attribute__((weak)) void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
     // Select col
     select_col(current_col);
     matrix_output_select_delay();
 
     // For each row...
     for (uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++) {
-        // Store last value of row prior to reading
-        matrix_row_t last_row_value    = current_matrix[row_index];
-        matrix_row_t current_row_value = last_row_value;
-
         // Check row pin state
         if (readPin(row_pins[row_index]) == 0) {
             // Pin LO, set col bit
-            current_row_value |= (MATRIX_ROW_SHIFTER << current_col);
+            current_matrix[row_index] |= (MATRIX_ROW_SHIFTER << current_col);
         } else {
             // Pin HI, clear col bit
-            current_row_value &= ~(MATRIX_ROW_SHIFTER << current_col);
-        }
-
-        // Determine if the matrix changed state
-        if ((last_row_value != current_row_value)) {
-            matrix_changed |= true;
-            current_matrix[row_index] = current_row_value;
+            current_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << current_col);
         }
     }
 
     // Unselect col
     unselect_col(current_col);
     matrix_output_unselect_delay();  // wait for all Row signals to go HIGH
-
-    return matrix_changed;
 }
 
-#    else
-#        error DIODE_DIRECTION must be one of COL2ROW or ROW2COL!
-#    endif
+#        else
+#            error DIODE_DIRECTION must be one of COL2ROW or ROW2COL!
+#        endif
+#    endif  // defined(MATRIX_ROW_PINS) && defined(MATRIX_COL_PINS)
 #else
 #    error DIODE_DIRECTION is not defined!
 #endif
@@ -233,7 +223,7 @@ void matrix_init(void) {
     thatHand = ROWS_PER_HAND - thisHand;
 
     // initialize key pins
-    init_pins();
+    matrix_init_pins();
 
     // initialize matrix state: all keys off
     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
@@ -288,20 +278,23 @@ bool matrix_post_scan(void) {
 }
 
 uint8_t matrix_scan(void) {
-    bool local_changed = false;
+    matrix_row_t curr_matrix[MATRIX_ROWS] = {0};
 
 #if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
     // Set row, read cols
     for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
-        local_changed |= read_cols_on_row(raw_matrix, current_row);
+        matrix_read_cols_on_row(curr_matrix, current_row);
     }
 #elif (DIODE_DIRECTION == ROW2COL)
     // Set col, read rows
     for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
-        local_changed |= read_rows_on_col(raw_matrix, current_col);
+        matrix_read_rows_on_col(curr_matrix, current_col);
     }
 #endif
 
+    bool local_changed = memcmp(raw_matrix, curr_matrix, sizeof(curr_matrix)) != 0;
+    if (local_changed) memcpy(raw_matrix, curr_matrix, sizeof(curr_matrix));
+
     debounce(raw_matrix, matrix + thisHand, ROWS_PER_HAND, local_changed);
 
     bool remote_changed = matrix_post_scan();
diff --git a/quantum/split_common/post_config.h b/quantum/split_common/post_config.h
index 4ae1d5273..a4c0a1956 100644
--- a/quantum/split_common/post_config.h
+++ b/quantum/split_common/post_config.h
@@ -7,13 +7,4 @@
 #    ifndef F_SCL
 #        define F_SCL 100000UL  // SCL frequency
 #    endif
-
-#else  // use serial
-// When using serial, the user must define RGBLIGHT_SPLIT explicitly
-//  in config.h as needed.
-//      see quantum/rgblight_post_config.h
-#    if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
-// When using serial and RGBLIGHT_SPLIT need separate transaction
-#        define SERIAL_USE_MULTI_TRANSACTION
-#    endif
 #endif
diff --git a/quantum/split_common/transaction_id_define.h b/quantum/split_common/transaction_id_define.h
new file mode 100644
index 000000000..464c73478
--- /dev/null
+++ b/quantum/split_common/transaction_id_define.h
@@ -0,0 +1,94 @@
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+enum serial_transaction_id {
+#ifdef USE_I2C
+    I2C_EXECUTE_CALLBACK,
+#endif  // USE_I2C
+
+    GET_SLAVE_MATRIX_CHECKSUM,
+    GET_SLAVE_MATRIX_DATA,
+
+#ifdef SPLIT_TRANSPORT_MIRROR
+    PUT_MASTER_MATRIX,
+#endif  // SPLIT_TRANSPORT_MIRROR
+
+#ifdef ENCODER_ENABLE
+    GET_ENCODERS_CHECKSUM,
+    GET_ENCODERS_DATA,
+#endif  // ENCODER_ENABLE
+
+#ifndef DISABLE_SYNC_TIMER
+    PUT_SYNC_TIMER,
+#endif  // DISABLE_SYNC_TIMER
+
+#if !defined(NO_ACTION_LAYER) && defined(SPLIT_LAYER_STATE_ENABLE)
+    PUT_LAYER_STATE,
+    PUT_DEFAULT_LAYER_STATE,
+#endif  // !defined(NO_ACTION_LAYER) && defined(SPLIT_LAYER_STATE_ENABLE)
+
+#ifdef SPLIT_LED_STATE_ENABLE
+    PUT_LED_STATE,
+#endif  // SPLIT_LED_STATE_ENABLE
+
+#ifdef SPLIT_MODS_ENABLE
+    PUT_MODS,
+#endif  // SPLIT_MODS_ENABLE
+
+#ifdef BACKLIGHT_ENABLE
+    PUT_BACKLIGHT,
+#endif  // BACKLIGHT_ENABLE
+
+#if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
+    PUT_RGBLIGHT,
+#endif  // defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
+
+#if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+    PUT_LED_MATRIX,
+#endif  // defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+
+#if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
+    PUT_RGB_MATRIX,
+#endif  // defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
+
+#if defined(WPM_ENABLE) && defined(SPLIT_WPM_ENABLE)
+    PUT_WPM,
+#endif  // defined(WPM_ENABLE) && defined(SPLIT_WPM_ENABLE)
+
+#if defined(SPLIT_TRANSACTION_IDS_KB) || defined(SPLIT_TRANSACTION_IDS_USER)
+    PUT_RPC_INFO,
+    PUT_RPC_REQ_DATA,
+    EXECUTE_RPC,
+    GET_RPC_RESP_DATA,
+#endif  // defined(SPLIT_TRANSACTION_IDS_KB) || defined(SPLIT_TRANSACTION_IDS_USER)
+
+// keyboard-specific
+#ifdef SPLIT_TRANSACTION_IDS_KB
+    SPLIT_TRANSACTION_IDS_KB,
+#endif  // SPLIT_TRANSACTION_IDS_KB
+
+// user/keymap-specific
+#ifdef SPLIT_TRANSACTION_IDS_USER
+    SPLIT_TRANSACTION_IDS_USER,
+#endif  // SPLIT_TRANSACTION_IDS_USER
+
+    NUM_TOTAL_TRANSACTIONS
+};
+
+// Ensure we only use 5 bits for transaction
+_Static_assert(NUM_TOTAL_TRANSACTIONS <= (1 << 5), "Max number of usable transactions exceeded");
diff --git a/quantum/split_common/transactions.c b/quantum/split_common/transactions.c
new file mode 100644
index 000000000..99a8623b3
--- /dev/null
+++ b/quantum/split_common/transactions.c
@@ -0,0 +1,670 @@
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <stddef.h>
+
+#include "debug.h"
+#include "matrix.h"
+#include "quantum.h"
+#include "transactions.h"
+#include "transport.h"
+#include "transaction_id_define.h"
+
+#define SYNC_TIMER_OFFSET 2
+
+#ifndef FORCED_SYNC_THROTTLE_MS
+#    define FORCED_SYNC_THROTTLE_MS 100
+#endif  // FORCED_SYNC_THROTTLE_MS
+
+#define sizeof_member(type, member) sizeof(((type *)NULL)->member)
+
+#define trans_initiator2target_initializer_cb(member, cb) \
+    { &dummy, sizeof_member(split_shared_memory_t, member), offsetof(split_shared_memory_t, member), 0, 0, cb }
+#define trans_initiator2target_initializer(member) trans_initiator2target_initializer_cb(member, NULL)
+
+#define trans_target2initiator_initializer_cb(member, cb) \
+    { &dummy, 0, 0, sizeof_member(split_shared_memory_t, member), offsetof(split_shared_memory_t, member), cb }
+#define trans_target2initiator_initializer(member) trans_target2initiator_initializer_cb(member, NULL)
+
+#define transport_write(id, data, length) transport_execute_transaction(id, data, length, NULL, 0)
+#define transport_read(id, data, length) transport_execute_transaction(id, NULL, 0, data, length)
+
+static uint8_t crc8(const void *data, size_t len) {
+    const uint8_t *p   = (const uint8_t *)data;
+    uint8_t        crc = 0xff;
+    size_t         i, j;
+    for (i = 0; i < len; i++) {
+        crc ^= p[i];
+        for (j = 0; j < 8; j++) {
+            if ((crc & 0x80) != 0)
+                crc = (uint8_t)((crc << 1) ^ 0x31);
+            else
+                crc <<= 1;
+        }
+    }
+    return crc;
+}
+
+#if defined(SPLIT_TRANSACTION_IDS_KB) || defined(SPLIT_TRANSACTION_IDS_USER)
+// Forward-declare the RPC callback handlers
+void slave_rpc_info_callback(uint8_t initiator2target_buffer_size, const void *initiator2target_buffer, uint8_t target2initiator_buffer_size, void *target2initiator_buffer);
+void slave_rpc_exec_callback(uint8_t initiator2target_buffer_size, const void *initiator2target_buffer, uint8_t target2initiator_buffer_size, void *target2initiator_buffer);
+#endif  // defined(SPLIT_TRANSACTION_IDS_KB) || defined(SPLIT_TRANSACTION_IDS_USER)
+
+////////////////////////////////////////////////////
+// Helpers
+
+bool transaction_handler_master(bool okay, matrix_row_t master_matrix[], matrix_row_t slave_matrix[], const char *prefix, bool (*handler)(matrix_row_t master_matrix[], matrix_row_t slave_matrix[])) {
+    if (okay) {
+        bool this_okay = true;
+        for (int iter = 1; iter <= 10; ++iter) {
+            if (!this_okay) {
+                for (int i = 0; i < iter * iter; ++i) {
+                    wait_us(10);
+                }
+            }
+            ATOMIC_BLOCK_FORCEON { this_okay = handler(master_matrix, slave_matrix); };
+            if (this_okay) break;
+        }
+        okay &= this_okay;
+        if (!okay) {
+            dprintf("Failed to execute %s\n", prefix);
+        }
+    }
+    return okay;
+}
+
+#define TRANSACTION_HANDLER_MASTER(prefix)                                                                \
+    do {                                                                                                  \
+        okay &= transaction_handler_master(okay, master_matrix, slave_matrix, #prefix, &prefix##_master); \
+    } while (0)
+
+#define TRANSACTION_HANDLER_SLAVE(prefix)                                      \
+    do {                                                                       \
+        ATOMIC_BLOCK_FORCEON { prefix##_slave(master_matrix, slave_matrix); }; \
+    } while (0)
+
+inline static bool read_if_checksum_mismatch(int8_t trans_id_checksum, int8_t trans_id_retrieve, uint32_t *last_update, void *destination, const void *equiv_shmem, size_t length) {
+    uint8_t curr_checksum;
+    bool    okay = transport_read(trans_id_checksum, &curr_checksum, sizeof(curr_checksum));
+    if (okay && (timer_elapsed32(*last_update) >= FORCED_SYNC_THROTTLE_MS || curr_checksum != crc8(equiv_shmem, length))) {
+        okay &= transport_read(trans_id_retrieve, destination, length);
+        okay &= curr_checksum == crc8(equiv_shmem, length);
+        if (okay) {
+            *last_update = timer_read32();
+        }
+    } else {
+        memcpy(destination, equiv_shmem, length);
+    }
+    return okay;
+}
+
+inline static bool send_if_condition(int8_t trans_id, uint32_t *last_update, bool condition, void *source, size_t length) {
+    bool okay = true;
+    if (timer_elapsed32(*last_update) >= FORCED_SYNC_THROTTLE_MS || condition) {
+        okay &= transport_write(trans_id, source, length);
+        if (okay) {
+            *last_update = timer_read32();
+        }
+    }
+    return okay;
+}
+
+inline static bool send_if_data_mismatch(int8_t trans_id, uint32_t *last_update, void *source, const void *equiv_shmem, size_t length) {
+    // Just run a memcmp to compare the source and equivalent shmem location
+    return send_if_condition(trans_id, last_update, (memcmp(source, equiv_shmem, length) != 0), source, length);
+}
+
+////////////////////////////////////////////////////
+// Slave matrix
+
+static bool slave_matrix_handlers_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    static uint32_t     last_update                    = 0;
+    static matrix_row_t last_matrix[(MATRIX_ROWS) / 2] = {0};  // last successfully-read matrix, so we can replicate if there are checksum errors
+    matrix_row_t        temp_matrix[(MATRIX_ROWS) / 2];        // holding area while we test whether or not checksum is correct
+
+    bool okay = read_if_checksum_mismatch(GET_SLAVE_MATRIX_CHECKSUM, GET_SLAVE_MATRIX_DATA, &last_update, temp_matrix, split_shmem->smatrix.matrix, sizeof(split_shmem->smatrix.matrix));
+    if (okay) {
+        // Checksum matches the received data, save as the last matrix state
+        memcpy(last_matrix, temp_matrix, sizeof(temp_matrix));
+    }
+    // Copy out the last-known-good matrix state to the slave matrix
+    memcpy(slave_matrix, last_matrix, sizeof(last_matrix));
+    return okay;
+}
+
+static void slave_matrix_handlers_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    memcpy(split_shmem->smatrix.matrix, slave_matrix, sizeof(split_shmem->smatrix.matrix));
+    split_shmem->smatrix.checksum = crc8(split_shmem->smatrix.matrix, sizeof(split_shmem->smatrix.matrix));
+}
+
+// clang-format off
+#define TRANSACTIONS_SLAVE_MATRIX_MASTER() TRANSACTION_HANDLER_MASTER(slave_matrix_handlers)
+#define TRANSACTIONS_SLAVE_MATRIX_SLAVE() TRANSACTION_HANDLER_SLAVE(slave_matrix_handlers)
+#define TRANSACTIONS_SLAVE_MATRIX_REGISTRATIONS \
+    [GET_SLAVE_MATRIX_CHECKSUM] = trans_target2initiator_initializer(smatrix.checksum), \
+    [GET_SLAVE_MATRIX_DATA]     = trans_target2initiator_initializer(smatrix.matrix),
+// clang-format on
+
+////////////////////////////////////////////////////
+// Master matrix
+
+#ifdef SPLIT_TRANSPORT_MIRROR
+
+static bool master_matrix_handlers_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    static uint32_t last_update = 0;
+    return send_if_data_mismatch(PUT_MASTER_MATRIX, &last_update, master_matrix, split_shmem->mmatrix.matrix, sizeof(split_shmem->mmatrix.matrix));
+}
+
+static void master_matrix_handlers_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    // Always copy to the master matrix
+    memcpy(master_matrix, split_shmem->mmatrix.matrix, sizeof(split_shmem->mmatrix.matrix));
+}
+
+#    define TRANSACTIONS_MASTER_MATRIX_MASTER() TRANSACTION_HANDLER_MASTER(master_matrix_handlers)
+#    define TRANSACTIONS_MASTER_MATRIX_SLAVE() TRANSACTION_HANDLER_SLAVE(master_matrix_handlers)
+#    define TRANSACTIONS_MASTER_MATRIX_REGISTRATIONS [PUT_MASTER_MATRIX] = trans_initiator2target_initializer(mmatrix.matrix),
+
+#else  // SPLIT_TRANSPORT_MIRROR
+
+#    define TRANSACTIONS_MASTER_MATRIX_MASTER()
+#    define TRANSACTIONS_MASTER_MATRIX_SLAVE()
+#    define TRANSACTIONS_MASTER_MATRIX_REGISTRATIONS
+
+#endif  // SPLIT_TRANSPORT_MIRROR
+
+////////////////////////////////////////////////////
+// Encoders
+
+#ifdef ENCODER_ENABLE
+
+static bool encoder_handlers_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    static uint32_t last_update = 0;
+    uint8_t         temp_state[NUMBER_OF_ENCODERS];
+
+    bool okay = read_if_checksum_mismatch(GET_ENCODERS_CHECKSUM, GET_ENCODERS_DATA, &last_update, temp_state, split_shmem->encoders.state, sizeof(temp_state));
+    if (okay) encoder_update_raw(temp_state);
+    return okay;
+}
+
+static void encoder_handlers_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    uint8_t encoder_state[NUMBER_OF_ENCODERS];
+    encoder_state_raw(encoder_state);
+    // Always prepare the encoder state for read.
+    memcpy(split_shmem->encoders.state, encoder_state, sizeof(encoder_state));
+    // Now update the checksum given that the encoders has been written to
+    split_shmem->encoders.checksum = crc8(encoder_state, sizeof(encoder_state));
+}
+
+// clang-format off
+#    define TRANSACTIONS_ENCODERS_MASTER() TRANSACTION_HANDLER_MASTER(encoder_handlers)
+#    define TRANSACTIONS_ENCODERS_SLAVE() TRANSACTION_HANDLER_SLAVE(encoder_handlers)
+#    define TRANSACTIONS_ENCODERS_REGISTRATIONS \
+    [GET_ENCODERS_CHECKSUM] = trans_target2initiator_initializer(encoders.checksum), \
+    [GET_ENCODERS_DATA]     = trans_target2initiator_initializer(encoders.state),
+// clang-format on
+
+#else  // ENCODER_ENABLE
+
+#    define TRANSACTIONS_ENCODERS_MASTER()
+#    define TRANSACTIONS_ENCODERS_SLAVE()
+#    define TRANSACTIONS_ENCODERS_REGISTRATIONS
+
+#endif  // ENCODER_ENABLE
+
+////////////////////////////////////////////////////
+// Sync timer
+
+#ifndef DISABLE_SYNC_TIMER
+
+static bool sync_timer_handlers_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    static uint32_t last_update = 0;
+
+    bool okay = true;
+    if (timer_elapsed32(last_update) >= FORCED_SYNC_THROTTLE_MS) {
+        uint32_t sync_timer = sync_timer_read32() + SYNC_TIMER_OFFSET;
+        okay &= transport_write(PUT_SYNC_TIMER, &sync_timer, sizeof(sync_timer));
+        if (okay) {
+            last_update = timer_read32();
+        }
+    }
+    return okay;
+}
+
+static void sync_timer_handlers_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    static uint32_t last_sync_timer = 0;
+    if (last_sync_timer != split_shmem->sync_timer) {
+        last_sync_timer = split_shmem->sync_timer;
+        sync_timer_update(last_sync_timer);
+    }
+}
+
+#    define TRANSACTIONS_SYNC_TIMER_MASTER() TRANSACTION_HANDLER_MASTER(sync_timer_handlers)
+#    define TRANSACTIONS_SYNC_TIMER_SLAVE() TRANSACTION_HANDLER_SLAVE(sync_timer_handlers)
+#    define TRANSACTIONS_SYNC_TIMER_REGISTRATIONS [PUT_SYNC_TIMER] = trans_initiator2target_initializer(sync_timer),
+
+#else  // DISABLE_SYNC_TIMER
+
+#    define TRANSACTIONS_SYNC_TIMER_MASTER()
+#    define TRANSACTIONS_SYNC_TIMER_SLAVE()
+#    define TRANSACTIONS_SYNC_TIMER_REGISTRATIONS
+
+#endif  // DISABLE_SYNC_TIMER
+
+////////////////////////////////////////////////////
+// Layer state
+
+#if !defined(NO_ACTION_LAYER) && defined(SPLIT_LAYER_STATE_ENABLE)
+
+static bool layer_state_handlers_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    static uint32_t last_layer_state_update         = 0;
+    static uint32_t last_default_layer_state_update = 0;
+
+    bool okay = send_if_condition(PUT_LAYER_STATE, &last_layer_state_update, (layer_state != split_shmem->layers.layer_state), &layer_state, sizeof(layer_state));
+    if (okay) {
+        okay &= send_if_condition(PUT_DEFAULT_LAYER_STATE, &last_default_layer_state_update, (default_layer_state != split_shmem->layers.default_layer_state), &default_layer_state, sizeof(default_layer_state));
+    }
+    return okay;
+}
+
+static void layer_state_handlers_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    layer_state         = split_shmem->layers.layer_state;
+    default_layer_state = split_shmem->layers.default_layer_state;
+}
+
+// clang-format off
+#    define TRANSACTIONS_LAYER_STATE_MASTER() TRANSACTION_HANDLER_MASTER(layer_state_handlers)
+#    define TRANSACTIONS_LAYER_STATE_SLAVE() TRANSACTION_HANDLER_SLAVE(layer_state_handlers)
+#    define TRANSACTIONS_LAYER_STATE_REGISTRATIONS \
+    [PUT_LAYER_STATE]         = trans_initiator2target_initializer(layers.layer_state), \
+    [PUT_DEFAULT_LAYER_STATE] = trans_initiator2target_initializer(layers.default_layer_state),
+// clang-format on
+
+#else  // !defined(NO_ACTION_LAYER) && defined(SPLIT_LAYER_STATE_ENABLE)
+
+#    define TRANSACTIONS_LAYER_STATE_MASTER()
+#    define TRANSACTIONS_LAYER_STATE_SLAVE()
+#    define TRANSACTIONS_LAYER_STATE_REGISTRATIONS
+
+#endif  // !defined(NO_ACTION_LAYER) && defined(SPLIT_LAYER_STATE_ENABLE)
+
+////////////////////////////////////////////////////
+// LED state
+
+#ifdef SPLIT_LED_STATE_ENABLE
+
+static bool led_state_handlers_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    static uint32_t last_update = 0;
+    uint8_t         led_state   = host_keyboard_leds();
+    return send_if_data_mismatch(PUT_LED_STATE, &last_update, &led_state, &split_shmem->led_state, sizeof(led_state));
+}
+
+static void led_state_handlers_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    void set_split_host_keyboard_leds(uint8_t led_state);
+    set_split_host_keyboard_leds(split_shmem->led_state);
+}
+
+#    define TRANSACTIONS_LED_STATE_MASTER() TRANSACTION_HANDLER_MASTER(led_state_handlers)
+#    define TRANSACTIONS_LED_STATE_SLAVE() TRANSACTION_HANDLER_SLAVE(led_state_handlers)
+#    define TRANSACTIONS_LED_STATE_REGISTRATIONS [PUT_LED_STATE] = trans_initiator2target_initializer(led_state),
+
+#else  // SPLIT_LED_STATE_ENABLE
+
+#    define TRANSACTIONS_LED_STATE_MASTER()
+#    define TRANSACTIONS_LED_STATE_SLAVE()
+#    define TRANSACTIONS_LED_STATE_REGISTRATIONS
+
+#endif  // SPLIT_LED_STATE_ENABLE
+
+////////////////////////////////////////////////////
+// Mods
+
+#ifdef SPLIT_MODS_ENABLE
+
+static bool mods_handlers_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    static uint32_t   last_update    = 0;
+    bool              mods_need_sync = timer_elapsed32(last_update) >= FORCED_SYNC_THROTTLE_MS;
+    split_mods_sync_t new_mods;
+    new_mods.real_mods = get_mods();
+    if (!mods_need_sync && new_mods.real_mods != split_shmem->mods.real_mods) {
+        mods_need_sync = true;
+    }
+
+    new_mods.weak_mods = get_weak_mods();
+    if (!mods_need_sync && new_mods.weak_mods != split_shmem->mods.weak_mods) {
+        mods_need_sync = true;
+    }
+
+#    ifndef NO_ACTION_ONESHOT
+    new_mods.oneshot_mods = get_oneshot_mods();
+    if (!mods_need_sync && new_mods.oneshot_mods != split_shmem->mods.oneshot_mods) {
+        mods_need_sync = true;
+    }
+#    endif  // NO_ACTION_ONESHOT
+
+    bool okay = true;
+    if (mods_need_sync) {
+        okay &= transport_write(PUT_MODS, &new_mods, sizeof(new_mods));
+        if (okay) {
+            last_update = timer_read32();
+        }
+    }
+
+    return okay;
+}
+
+static void mods_handlers_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    set_mods(split_shmem->mods.real_mods);
+    set_weak_mods(split_shmem->mods.weak_mods);
+#    ifndef NO_ACTION_ONESHOT
+    set_oneshot_mods(split_shmem->mods.oneshot_mods);
+#    endif
+}
+
+#    define TRANSACTIONS_MODS_MASTER() TRANSACTION_HANDLER_MASTER(mods_handlers)
+#    define TRANSACTIONS_MODS_SLAVE() TRANSACTION_HANDLER_SLAVE(mods_handlers)
+#    define TRANSACTIONS_MODS_REGISTRATIONS [PUT_MODS] = trans_initiator2target_initializer(mods),
+
+#else  // SPLIT_MODS_ENABLE
+
+#    define TRANSACTIONS_MODS_MASTER()
+#    define TRANSACTIONS_MODS_SLAVE()
+#    define TRANSACTIONS_MODS_REGISTRATIONS
+
+#endif  // SPLIT_MODS_ENABLE
+
+////////////////////////////////////////////////////
+// Backlight
+
+#ifdef BACKLIGHT_ENABLE
+
+static bool backlight_handlers_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    static uint32_t last_update = 0;
+    uint8_t         level       = is_backlight_enabled() ? get_backlight_level() : 0;
+    return send_if_condition(PUT_BACKLIGHT, &last_update, (level != split_shmem->backlight_level), &level, sizeof(level));
+}
+
+static void backlight_handlers_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) { backlight_set(split_shmem->backlight_level); }
+
+#    define TRANSACTIONS_BACKLIGHT_MASTER() TRANSACTION_HANDLER_MASTER(backlight_handlers)
+#    define TRANSACTIONS_BACKLIGHT_SLAVE() TRANSACTION_HANDLER_SLAVE(backlight_handlers)
+#    define TRANSACTIONS_BACKLIGHT_REGISTRATIONS [PUT_BACKLIGHT] = trans_initiator2target_initializer(backlight_level),
+
+#else  // BACKLIGHT_ENABLE
+
+#    define TRANSACTIONS_BACKLIGHT_MASTER()
+#    define TRANSACTIONS_BACKLIGHT_SLAVE()
+#    define TRANSACTIONS_BACKLIGHT_REGISTRATIONS
+
+#endif  // BACKLIGHT_ENABLE
+
+////////////////////////////////////////////////////
+// RGBLIGHT
+
+#if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
+
+static bool rgblight_handlers_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    static uint32_t     last_update = 0;
+    rgblight_syncinfo_t rgblight_sync;
+    rgblight_get_syncinfo(&rgblight_sync);
+    if (send_if_condition(PUT_RGBLIGHT, &last_update, (rgblight_sync.status.change_flags != 0), &rgblight_sync, sizeof(rgblight_sync))) {
+        rgblight_clear_change_flags();
+    } else {
+        return false;
+    }
+    return true;
+}
+
+static void rgblight_handlers_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    // Update the RGB with the new data
+    if (split_shmem->rgblight_sync.status.change_flags != 0) {
+        rgblight_update_sync(&split_shmem->rgblight_sync, false);
+        split_shmem->rgblight_sync.status.change_flags = 0;
+    }
+}
+
+#    define TRANSACTIONS_RGBLIGHT_MASTER() TRANSACTION_HANDLER_MASTER(rgblight_handlers)
+#    define TRANSACTIONS_RGBLIGHT_SLAVE() TRANSACTION_HANDLER_SLAVE(rgblight_handlers)
+#    define TRANSACTIONS_RGBLIGHT_REGISTRATIONS [PUT_RGBLIGHT] = trans_initiator2target_initializer(rgblight_sync),
+
+#else  // defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
+
+#    define TRANSACTIONS_RGBLIGHT_MASTER()
+#    define TRANSACTIONS_RGBLIGHT_SLAVE()
+#    define TRANSACTIONS_RGBLIGHT_REGISTRATIONS
+
+#endif  // defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
+
+////////////////////////////////////////////////////
+// LED Matrix
+
+#if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+
+static bool led_matrix_handlers_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    static uint32_t   last_update = 0;
+    led_matrix_sync_t led_matrix_sync;
+    memcpy(&led_matrix_sync.led_matrix, &led_matrix_eeconfig, sizeof(led_eeconfig_t));
+    led_matrix_sync.led_suspend_state = led_matrix_get_suspend_state();
+    return send_if_data_mismatch(PUT_LED_MATRIX, &last_update, &led_matrix_sync, &split_shmem->led_matrix_sync, sizeof(led_matrix_sync));
+}
+
+static void led_matrix_handlers_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    memcpy(&led_matrix_eeconfig, &split_shmem->led_matrix_sync.led_matrix, sizeof(led_eeconfig_t));
+    led_matrix_set_suspend_state(split_shmem->led_matrix_sync.led_suspend_state);
+}
+
+#    define TRANSACTIONS_LED_MATRIX_MASTER() TRANSACTION_HANDLER_MASTER(led_matrix_handlers)
+#    define TRANSACTIONS_LED_MATRIX_SLAVE() TRANSACTION_HANDLER_SLAVE(led_matrix_handlers)
+#    define TRANSACTIONS_LED_MATRIX_REGISTRATIONS [PUT_LED_MATRIX] = trans_initiator2target_initializer(led_matrix_sync),
+
+#else  // defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+
+#    define TRANSACTIONS_LED_MATRIX_MASTER()
+#    define TRANSACTIONS_LED_MATRIX_SLAVE()
+#    define TRANSACTIONS_LED_MATRIX_REGISTRATIONS
+
+#endif  // defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+
+////////////////////////////////////////////////////
+// RGB Matrix
+
+#if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
+
+static bool rgb_matrix_handlers_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    static uint32_t   last_update = 0;
+    rgb_matrix_sync_t rgb_matrix_sync;
+    memcpy(&rgb_matrix_sync.rgb_matrix, &rgb_matrix_config, sizeof(rgb_config_t));
+    rgb_matrix_sync.rgb_suspend_state = rgb_matrix_get_suspend_state();
+    return send_if_data_mismatch(PUT_RGB_MATRIX, &last_update, &rgb_matrix_sync, &split_shmem->rgb_matrix_sync, sizeof(rgb_matrix_sync));
+}
+
+static void rgb_matrix_handlers_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    memcpy(&rgb_matrix_config, &split_shmem->rgb_matrix_sync.rgb_matrix, sizeof(rgb_config_t));
+    rgb_matrix_set_suspend_state(split_shmem->rgb_matrix_sync.rgb_suspend_state);
+}
+
+#    define TRANSACTIONS_RGB_MATRIX_MASTER() TRANSACTION_HANDLER_MASTER(rgb_matrix_handlers)
+#    define TRANSACTIONS_RGB_MATRIX_SLAVE() TRANSACTION_HANDLER_SLAVE(rgb_matrix_handlers)
+#    define TRANSACTIONS_RGB_MATRIX_REGISTRATIONS [PUT_RGB_MATRIX] = trans_initiator2target_initializer(rgb_matrix_sync),
+
+#else  // defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
+
+#    define TRANSACTIONS_RGB_MATRIX_MASTER()
+#    define TRANSACTIONS_RGB_MATRIX_SLAVE()
+#    define TRANSACTIONS_RGB_MATRIX_REGISTRATIONS
+
+#endif  // defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
+
+////////////////////////////////////////////////////
+// WPM
+
+#if defined(WPM_ENABLE) && defined(SPLIT_WPM_ENABLE)
+
+static bool wpm_handlers_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    static uint32_t last_update = 0;
+    uint8_t         current_wpm = get_current_wpm();
+    return send_if_condition(PUT_WPM, &last_update, (current_wpm != split_shmem->current_wpm), &current_wpm, sizeof(current_wpm));
+}
+
+static void wpm_handlers_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) { set_current_wpm(split_shmem->current_wpm); }
+
+#    define TRANSACTIONS_WPM_MASTER() TRANSACTION_HANDLER_MASTER(wpm_handlers)
+#    define TRANSACTIONS_WPM_SLAVE() TRANSACTION_HANDLER_SLAVE(wpm_handlers)
+#    define TRANSACTIONS_WPM_REGISTRATIONS [PUT_WPM] = trans_initiator2target_initializer(current_wpm),
+
+#else  // defined(WPM_ENABLE) && defined(SPLIT_WPM_ENABLE)
+
+#    define TRANSACTIONS_WPM_MASTER()
+#    define TRANSACTIONS_WPM_SLAVE()
+#    define TRANSACTIONS_WPM_REGISTRATIONS
+
+#endif  // defined(WPM_ENABLE) && defined(SPLIT_WPM_ENABLE)
+
+////////////////////////////////////////////////////
+
+uint8_t                  dummy;
+split_transaction_desc_t split_transaction_table[NUM_TOTAL_TRANSACTIONS] = {
+    // Set defaults
+    [0 ...(NUM_TOTAL_TRANSACTIONS - 1)] = {NULL, 0, 0, 0, 0, 0},
+
+#ifdef USE_I2C
+    [I2C_EXECUTE_CALLBACK] = trans_initiator2target_initializer(transaction_id),
+#endif  // USE_I2C
+
+    // clang-format off
+    TRANSACTIONS_SLAVE_MATRIX_REGISTRATIONS
+    TRANSACTIONS_MASTER_MATRIX_REGISTRATIONS
+    TRANSACTIONS_ENCODERS_REGISTRATIONS
+    TRANSACTIONS_SYNC_TIMER_REGISTRATIONS
+    TRANSACTIONS_LAYER_STATE_REGISTRATIONS
+    TRANSACTIONS_LED_STATE_REGISTRATIONS
+    TRANSACTIONS_MODS_REGISTRATIONS
+    TRANSACTIONS_BACKLIGHT_REGISTRATIONS
+    TRANSACTIONS_RGBLIGHT_REGISTRATIONS
+    TRANSACTIONS_LED_MATRIX_REGISTRATIONS
+    TRANSACTIONS_RGB_MATRIX_REGISTRATIONS
+    TRANSACTIONS_WPM_REGISTRATIONS
+// clang-format on
+
+#if defined(SPLIT_TRANSACTION_IDS_KB) || defined(SPLIT_TRANSACTION_IDS_USER)
+        [PUT_RPC_INFO]  = trans_initiator2target_initializer_cb(rpc_info, slave_rpc_info_callback),
+    [PUT_RPC_REQ_DATA]  = trans_initiator2target_initializer(rpc_m2s_buffer),
+    [EXECUTE_RPC]       = trans_initiator2target_initializer_cb(rpc_info.transaction_id, slave_rpc_exec_callback),
+    [GET_RPC_RESP_DATA] = trans_target2initiator_initializer(rpc_s2m_buffer),
+#endif  // defined(SPLIT_TRANSACTION_IDS_KB) || defined(SPLIT_TRANSACTION_IDS_USER)
+};
+
+bool transactions_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    bool okay = true;
+    TRANSACTIONS_SLAVE_MATRIX_MASTER();
+    TRANSACTIONS_MASTER_MATRIX_MASTER();
+    TRANSACTIONS_ENCODERS_MASTER();
+    TRANSACTIONS_SYNC_TIMER_MASTER();
+    TRANSACTIONS_LAYER_STATE_MASTER();
+    TRANSACTIONS_LED_STATE_MASTER();
+    TRANSACTIONS_MODS_MASTER();
+    TRANSACTIONS_BACKLIGHT_MASTER();
+    TRANSACTIONS_RGBLIGHT_MASTER();
+    TRANSACTIONS_LED_MATRIX_MASTER();
+    TRANSACTIONS_RGB_MATRIX_MASTER();
+    TRANSACTIONS_WPM_MASTER();
+    return okay;
+}
+
+void transactions_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
+    TRANSACTIONS_SLAVE_MATRIX_SLAVE();
+    TRANSACTIONS_MASTER_MATRIX_SLAVE();
+    TRANSACTIONS_ENCODERS_SLAVE();
+    TRANSACTIONS_SYNC_TIMER_SLAVE();
+    TRANSACTIONS_LAYER_STATE_SLAVE();
+    TRANSACTIONS_LED_STATE_SLAVE();
+    TRANSACTIONS_MODS_SLAVE();
+    TRANSACTIONS_BACKLIGHT_SLAVE();
+    TRANSACTIONS_RGBLIGHT_SLAVE();
+    TRANSACTIONS_LED_MATRIX_SLAVE();
+    TRANSACTIONS_RGB_MATRIX_SLAVE();
+    TRANSACTIONS_WPM_SLAVE();
+}
+
+#if defined(SPLIT_TRANSACTION_IDS_KB) || defined(SPLIT_TRANSACTION_IDS_USER)
+
+void transaction_register_rpc(int8_t transaction_id, slave_callback_t callback) {
+    // Prevent invoking RPC on QMK core sync data
+    if (transaction_id <= GET_RPC_RESP_DATA) return;
+
+    // Set the callback
+    split_transaction_table[transaction_id].slave_callback          = callback;
+    split_transaction_table[transaction_id].initiator2target_offset = offsetof(split_shared_memory_t, rpc_m2s_buffer);
+    split_transaction_table[transaction_id].target2initiator_offset = offsetof(split_shared_memory_t, rpc_s2m_buffer);
+}
+
+bool transaction_rpc_exec(int8_t transaction_id, uint8_t initiator2target_buffer_size, const void *initiator2target_buffer, uint8_t target2initiator_buffer_size, void *target2initiator_buffer) {
+    // Prevent invoking RPC on QMK core sync data
+    if (transaction_id <= GET_RPC_RESP_DATA) return false;
+    // Prevent sizing issues
+    if (initiator2target_buffer_size > RPC_M2S_BUFFER_SIZE) return false;
+    if (target2initiator_buffer_size > RPC_S2M_BUFFER_SIZE) return false;
+
+    // Prepare the metadata block
+    rpc_sync_info_t info = {.transaction_id = transaction_id, .m2s_length = initiator2target_buffer_size, .s2m_length = target2initiator_buffer_size};
+
+    // Make sure the local side knows that we're not sending the full block of data
+    split_transaction_table[PUT_RPC_REQ_DATA].initiator2target_buffer_size  = initiator2target_buffer_size;
+    split_transaction_table[GET_RPC_RESP_DATA].target2initiator_buffer_size = target2initiator_buffer_size;
+
+    // Run through the sequence:
+    // * set the transaction ID and lengths
+    // * send the request data
+    // * execute RPC callback
+    // * retrieve the response data
+    if (!transport_write(PUT_RPC_INFO, &info, sizeof(info))) {
+        return false;
+    }
+    if (!transport_write(PUT_RPC_REQ_DATA, initiator2target_buffer, initiator2target_buffer_size)) {
+        return false;
+    }
+    if (!transport_write(EXECUTE_RPC, &transaction_id, sizeof(transaction_id))) {
+        return false;
+    }
+    if (!transport_read(GET_RPC_RESP_DATA, target2initiator_buffer, target2initiator_buffer_size)) {
+        return false;
+    }
+    return true;
+}
+
+void slave_rpc_info_callback(uint8_t initiator2target_buffer_size, const void *initiator2target_buffer, uint8_t target2initiator_buffer_size, void *target2initiator_buffer) {
+    // The RPC info block contains the intended transaction ID, as well as the sizes for both inbound and outbound data.
+    // Ignore the args -- the `split_shmem` already has the info, we just need to act upon it.
+    // We must keep the `split_transaction_table` non-const, so that it is able to be modified at runtime.
+
+    split_transaction_table[PUT_RPC_REQ_DATA].initiator2target_buffer_size  = split_shmem->rpc_info.m2s_length;
+    split_transaction_table[GET_RPC_RESP_DATA].target2initiator_buffer_size = split_shmem->rpc_info.s2m_length;
+}
+
+void slave_rpc_exec_callback(uint8_t initiator2target_buffer_size, const void *initiator2target_buffer, uint8_t target2initiator_buffer_size, void *target2initiator_buffer) {
+    // We can assume that the buffer lengths are correctly set, now, given that sequentially the rpc_info callback was already executed.
+    // Go through the rpc_info and execute _that_ transaction's callback, with the scratch buffers as inputs.
+    int8_t transaction_id = split_shmem->rpc_info.transaction_id;
+    if (transaction_id < NUM_TOTAL_TRANSACTIONS) {
+        split_transaction_desc_t *trans = &split_transaction_table[transaction_id];
+        if (trans->slave_callback) {
+            trans->slave_callback(split_shmem->rpc_info.m2s_length, split_shmem->rpc_m2s_buffer, split_shmem->rpc_info.s2m_length, split_shmem->rpc_s2m_buffer);
+        }
+    }
+}
+
+#endif  // defined(SPLIT_TRANSACTION_IDS_KB) || defined(SPLIT_TRANSACTION_IDS_USER)
diff --git a/quantum/split_common/transactions.h b/quantum/split_common/transactions.h
new file mode 100644
index 000000000..4306ba1d8
--- /dev/null
+++ b/quantum/split_common/transactions.h
@@ -0,0 +1,54 @@
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "stdint.h"
+#include "stdbool.h"
+
+#include "matrix.h"
+#include "transaction_id_define.h"
+#include "transport.h"
+
+typedef void (*slave_callback_t)(uint8_t initiator2target_buffer_size, const void *initiator2target_buffer, uint8_t target2initiator_buffer_size, void *target2initiator_buffer);
+
+// Split transaction Descriptor
+typedef struct _split_transaction_desc_t {
+    uint8_t *        status;
+    uint8_t          initiator2target_buffer_size;
+    uint16_t         initiator2target_offset;
+    uint8_t          target2initiator_buffer_size;
+    uint16_t         target2initiator_offset;
+    slave_callback_t slave_callback;
+} split_transaction_desc_t;
+
+// Forward declaration for the split transactions
+extern split_transaction_desc_t split_transaction_table[NUM_TOTAL_TRANSACTIONS];
+
+#define split_shmem_offset_ptr(offset) ((void *)(((uint8_t *)split_shmem) + (offset)))
+#define split_trans_initiator2target_buffer(trans) (split_shmem_offset_ptr((trans)->initiator2target_offset))
+#define split_trans_target2initiator_buffer(trans) (split_shmem_offset_ptr((trans)->target2initiator_offset))
+
+// returns false if valid data not received from slave
+bool transactions_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]);
+void transactions_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]);
+
+void transaction_register_rpc(int8_t transaction_id, slave_callback_t callback);
+
+bool transaction_rpc_exec(int8_t transaction_id, uint8_t initiator2target_buffer_size, const void *initiator2target_buffer, uint8_t target2initiator_buffer_size, void *target2initiator_buffer);
+
+#define transaction_rpc_send(transaction_id, initiator2target_buffer_size, initiator2target_buffer) transaction_rpc_exec(transaction_id, initiator2target_buffer_size, initiator2target_buffer, 0, NULL)
+#define transaction_rpc_recv(transaction_id, target2initiator_buffer_size, target2initiator_buffer) transaction_rpc_exec(transaction_id, 0, NULL, target2initiator_buffer_size, target2initiator_buffer)
diff --git a/quantum/split_common/transport.c b/quantum/split_common/transport.c
index 9ed0f7591..a711ef85f 100644
--- a/quantum/split_common/transport.c
+++ b/quantum/split_common/transport.c
@@ -1,452 +1,118 @@
-#include <string.h>
-#include <stddef.h>
-
-#include "config.h"
-#include "matrix.h"
-#include "quantum.h"
-
-#define ROWS_PER_HAND (MATRIX_ROWS / 2)
-#define SYNC_TIMER_OFFSET 2
-
-#ifdef RGBLIGHT_ENABLE
-#    include "rgblight.h"
-#endif
-
-#ifdef BACKLIGHT_ENABLE
-#    include "backlight.h"
-#endif
-
-#ifdef ENCODER_ENABLE
-#    include "encoder.h"
-static pin_t encoders_pad[] = ENCODERS_PAD_A;
-#    define NUMBER_OF_ENCODERS (sizeof(encoders_pad) / sizeof(pin_t))
-#endif
-
-#if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
-#    include "led_matrix.h"
-#endif
-#if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
-#    include "rgb_matrix.h"
-#endif
-
-#if defined(USE_I2C)
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
-#    include "i2c_master.h"
-#    include "i2c_slave.h"
-
-typedef struct _I2C_slave_buffer_t {
-#    ifndef DISABLE_SYNC_TIMER
-    uint32_t sync_timer;
-#    endif
-#    ifdef SPLIT_TRANSPORT_MIRROR
-    matrix_row_t mmatrix[ROWS_PER_HAND];
-#    endif
-    matrix_row_t smatrix[ROWS_PER_HAND];
-#    ifdef SPLIT_MODS_ENABLE
-    uint8_t real_mods;
-    uint8_t weak_mods;
-#        ifndef NO_ACTION_ONESHOT
-    uint8_t oneshot_mods;
-#        endif
-#    endif
-#    ifdef BACKLIGHT_ENABLE
-    uint8_t backlight_level;
-#    endif
-#    if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
-    rgblight_syncinfo_t rgblight_sync;
-#    endif
-#    ifdef ENCODER_ENABLE
-    uint8_t encoder_state[NUMBER_OF_ENCODERS];
-#    endif
-#    ifdef WPM_ENABLE
-    uint8_t current_wpm;
-#    endif
-#    if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
-    led_eeconfig_t led_matrix;
-    bool           led_suspend_state;
-#    endif
-#    if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
-    rgb_config_t rgb_matrix;
-    bool         rgb_suspend_state;
-#    endif
-} I2C_slave_buffer_t;
+#include <string.h>
+#include <debug.h>
 
-static I2C_slave_buffer_t *const i2c_buffer = (I2C_slave_buffer_t *)i2c_slave_reg;
+#include "transactions.h"
+#include "transport.h"
+#include "transaction_id_define.h"
+#include "atomic_util.h"
 
-#    define I2C_SYNC_TIME_START offsetof(I2C_slave_buffer_t, sync_timer)
-#    define I2C_KEYMAP_MASTER_START offsetof(I2C_slave_buffer_t, mmatrix)
-#    define I2C_KEYMAP_SLAVE_START offsetof(I2C_slave_buffer_t, smatrix)
-#    define I2C_REAL_MODS_START offsetof(I2C_slave_buffer_t, real_mods)
-#    define I2C_WEAK_MODS_START offsetof(I2C_slave_buffer_t, weak_mods)
-#    define I2C_ONESHOT_MODS_START offsetof(I2C_slave_buffer_t, oneshot_mods)
-#    define I2C_BACKLIGHT_START offsetof(I2C_slave_buffer_t, backlight_level)
-#    define I2C_RGB_START offsetof(I2C_slave_buffer_t, rgblight_sync)
-#    define I2C_ENCODER_START offsetof(I2C_slave_buffer_t, encoder_state)
-#    define I2C_WPM_START offsetof(I2C_slave_buffer_t, current_wpm)
-#    define I2C_LED_MATRIX_START offsetof(I2C_slave_buffer_t, led_matrix)
-#    define I2C_LED_SUSPEND_START offsetof(I2C_slave_buffer_t, led_suspend_state)
-#    define I2C_RGB_MATRIX_START offsetof(I2C_slave_buffer_t, rgb_matrix)
-#    define I2C_RGB_SUSPEND_START offsetof(I2C_slave_buffer_t, rgb_suspend_state)
+#ifdef USE_I2C
 
-#    define TIMEOUT 100
+#    ifndef SLAVE_I2C_TIMEOUT
+#        define SLAVE_I2C_TIMEOUT 100
+#    endif  // SLAVE_I2C_TIMEOUT
 
 #    ifndef SLAVE_I2C_ADDRESS
 #        define SLAVE_I2C_ADDRESS 0x32
 #    endif
 
-// Get rows from other half over i2c
-bool transport_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
-    i2c_readReg(SLAVE_I2C_ADDRESS, I2C_KEYMAP_SLAVE_START, (void *)slave_matrix, sizeof(i2c_buffer->smatrix), TIMEOUT);
-#    ifdef SPLIT_TRANSPORT_MIRROR
-    i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_KEYMAP_MASTER_START, (void *)master_matrix, sizeof(i2c_buffer->mmatrix), TIMEOUT);
-#    endif
+#    include "i2c_master.h"
+#    include "i2c_slave.h"
 
-    // write backlight info
-#    ifdef BACKLIGHT_ENABLE
-    uint8_t level = is_backlight_enabled() ? get_backlight_level() : 0;
-    if (level != i2c_buffer->backlight_level) {
-        if (i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_BACKLIGHT_START, (void *)&level, sizeof(level), TIMEOUT) >= 0) {
-            i2c_buffer->backlight_level = level;
-        }
-    }
-#    endif
+// Ensure the I2C buffer has enough space
+_Static_assert(sizeof(split_shared_memory_t) <= I2C_SLAVE_REG_COUNT, "split_shared_memory_t too large for I2C_SLAVE_REG_COUNT");
 
-#    if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
-    if (rgblight_get_change_flags()) {
-        rgblight_syncinfo_t rgblight_sync;
-        rgblight_get_syncinfo(&rgblight_sync);
-        if (i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_RGB_START, (void *)&rgblight_sync, sizeof(rgblight_sync), TIMEOUT) >= 0) {
-            rgblight_clear_change_flags();
-        }
-    }
-#    endif
+split_shared_memory_t *const split_shmem = (split_shared_memory_t *)i2c_slave_reg;
 
-#    ifdef ENCODER_ENABLE
-    i2c_readReg(SLAVE_I2C_ADDRESS, I2C_ENCODER_START, (void *)i2c_buffer->encoder_state, sizeof(i2c_buffer->encoder_state), TIMEOUT);
-    encoder_update_raw(i2c_buffer->encoder_state);
-#    endif
+void transport_master_init(void) { i2c_init(); }
+void transport_slave_init(void) { i2c_slave_init(SLAVE_I2C_ADDRESS); }
 
-#    ifdef WPM_ENABLE
-    uint8_t current_wpm = get_current_wpm();
-    if (current_wpm != i2c_buffer->current_wpm) {
-        if (i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_WPM_START, (void *)&current_wpm, sizeof(current_wpm), TIMEOUT) >= 0) {
-            i2c_buffer->current_wpm = current_wpm;
-        }
+i2c_status_t transport_trigger_callback(int8_t id) {
+    // If there's no callback, indicate that we were successful
+    if (!split_transaction_table[id].slave_callback) {
+        return I2C_STATUS_SUCCESS;
     }
-#    endif
 
-#    ifdef SPLIT_MODS_ENABLE
-    uint8_t real_mods = get_mods();
-    if (real_mods != i2c_buffer->real_mods) {
-        if (i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_REAL_MODS_START, (void *)&real_mods, sizeof(real_mods), TIMEOUT) >= 0) {
-            i2c_buffer->real_mods = real_mods;
+    // Kick off the "callback executor", now that data has been written to the slave
+    split_shmem->transaction_id     = id;
+    split_transaction_desc_t *trans = &split_transaction_table[I2C_EXECUTE_CALLBACK];
+    return i2c_writeReg(SLAVE_I2C_ADDRESS, trans->initiator2target_offset, split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size, SLAVE_I2C_TIMEOUT);
+}
+
+bool transport_execute_transaction(int8_t id, const void *initiator2target_buf, uint16_t initiator2target_length, void *target2initiator_buf, uint16_t target2initiator_length) {
+    i2c_status_t              status;
+    split_transaction_desc_t *trans = &split_transaction_table[id];
+    if (initiator2target_length > 0) {
+        size_t len = trans->initiator2target_buffer_size < initiator2target_length ? trans->initiator2target_buffer_size : initiator2target_length;
+        memcpy(split_trans_initiator2target_buffer(trans), initiator2target_buf, len);
+        if ((status = i2c_writeReg(SLAVE_I2C_ADDRESS, trans->initiator2target_offset, split_trans_initiator2target_buffer(trans), len, SLAVE_I2C_TIMEOUT)) < 0) {
+            return false;
         }
     }
 
-    uint8_t weak_mods = get_weak_mods();
-    if (weak_mods != i2c_buffer->weak_mods) {
-        if (i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_WEAK_MODS_START, (void *)&weak_mods, sizeof(weak_mods), TIMEOUT) >= 0) {
-            i2c_buffer->weak_mods = weak_mods;
-        }
+    // If we need to execute a callback on the slave, do so
+    if ((status = transport_trigger_callback(id)) < 0) {
+        return false;
     }
 
-#        ifndef NO_ACTION_ONESHOT
-    uint8_t oneshot_mods = get_oneshot_mods();
-    if (oneshot_mods != i2c_buffer->oneshot_mods) {
-        if (i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_ONESHOT_MODS_START, (void *)&oneshot_mods, sizeof(oneshot_mods), TIMEOUT) >= 0) {
-            i2c_buffer->oneshot_mods = oneshot_mods;
+    if (target2initiator_length > 0) {
+        size_t len = trans->target2initiator_buffer_size < target2initiator_length ? trans->target2initiator_buffer_size : target2initiator_length;
+        if ((status = i2c_readReg(SLAVE_I2C_ADDRESS, trans->target2initiator_offset, split_trans_target2initiator_buffer(trans), len, SLAVE_I2C_TIMEOUT)) < 0) {
+            return false;
         }
+        memcpy(target2initiator_buf, split_trans_target2initiator_buffer(trans), len);
     }
-#        endif
-#    endif
 
-#    if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
-    i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_LED_MATRIX_START, (void *)led_matrix_eeconfig, sizeof(i2c_buffer->led_matrix), TIMEOUT);
-    bool suspend_state = led_matrix_get_suspend_state();
-    i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_LED_SUSPEND_START, (void *)suspend_state, sizeof(i2c_buffer->led_suspend_state), TIMEOUT);
-#    endif
-#    if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
-    i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_RGB_MATRIX_START, (void *)rgb_matrix_config, sizeof(i2c_buffer->rgb_matrix), TIMEOUT);
-    bool suspend_state = rgb_matrix_get_suspend_state();
-    i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_RGB_SUSPEND_START, (void *)suspend_state, sizeof(i2c_buffer->rgb_suspend_state), TIMEOUT);
-#    endif
-
-#    ifndef DISABLE_SYNC_TIMER
-    i2c_buffer->sync_timer = sync_timer_read32() + SYNC_TIMER_OFFSET;
-    i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_SYNC_TIME_START, (void *)&i2c_buffer->sync_timer, sizeof(i2c_buffer->sync_timer), TIMEOUT);
-#    endif
     return true;
 }
 
-void transport_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
-#    ifndef DISABLE_SYNC_TIMER
-    sync_timer_update(i2c_buffer->sync_timer);
-#    endif
-    // Copy matrix to I2C buffer
-    memcpy((void *)i2c_buffer->smatrix, (void *)slave_matrix, sizeof(i2c_buffer->smatrix));
-#    ifdef SPLIT_TRANSPORT_MIRROR
-    memcpy((void *)master_matrix, (void *)i2c_buffer->mmatrix, sizeof(i2c_buffer->mmatrix));
-#    endif
-
-// Read Backlight Info
-#    ifdef BACKLIGHT_ENABLE
-    backlight_set(i2c_buffer->backlight_level);
-#    endif
-
-#    if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
-    // Update the RGB with the new data
-    if (i2c_buffer->rgblight_sync.status.change_flags != 0) {
-        rgblight_update_sync(&i2c_buffer->rgblight_sync, false);
-        i2c_buffer->rgblight_sync.status.change_flags = 0;
-    }
-#    endif
-
-#    ifdef ENCODER_ENABLE
-    encoder_state_raw(i2c_buffer->encoder_state);
-#    endif
-
-#    ifdef WPM_ENABLE
-    set_current_wpm(i2c_buffer->current_wpm);
-#    endif
-
-#    ifdef SPLIT_MODS_ENABLE
-    set_mods(i2c_buffer->real_mods);
-    set_weak_mods(i2c_buffer->weak_mods);
-#        ifndef NO_ACTION_ONESHOT
-    set_oneshot_mods(i2c_buffer->oneshot_mods);
-#        endif
-#    endif
-
-#    if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
-    memcpy((void *)i2c_buffer->led_matrix, (void *)led_matrix_eeconfig, sizeof(i2c_buffer->led_matrix));
-    led_matrix_set_suspend_state(i2c_buffer->led_suspend_state);
-#    endif
-#    if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
-    memcpy((void *)i2c_buffer->rgb_matrix, (void *)rgb_matrix_config, sizeof(i2c_buffer->rgb_matrix));
-    rgb_matrix_set_suspend_state(i2c_buffer->rgb_suspend_state);
-#    endif
-}
-
-void transport_master_init(void) { i2c_init(); }
-
-void transport_slave_init(void) { i2c_slave_init(SLAVE_I2C_ADDRESS); }
-
-#else  // USE_SERIAL
+#else  // USE_I2C
 
 #    include "serial.h"
 
-typedef struct _Serial_s2m_buffer_t {
-    // TODO: if MATRIX_COLS > 8 change to uint8_t packed_matrix[] for pack/unpack
-    matrix_row_t smatrix[ROWS_PER_HAND];
-
-#    ifdef ENCODER_ENABLE
-    uint8_t encoder_state[NUMBER_OF_ENCODERS];
-#    endif
-
-} Serial_s2m_buffer_t;
-
-typedef struct _Serial_m2s_buffer_t {
-#    ifdef SPLIT_MODS_ENABLE
-    uint8_t real_mods;
-    uint8_t weak_mods;
-#        ifndef NO_ACTION_ONESHOT
-    uint8_t oneshot_mods;
-#        endif
-#    endif
-#    ifndef DISABLE_SYNC_TIMER
-    uint32_t sync_timer;
-#    endif
-#    ifdef SPLIT_TRANSPORT_MIRROR
-    matrix_row_t mmatrix[ROWS_PER_HAND];
-#    endif
-#    ifdef BACKLIGHT_ENABLE
-    uint8_t backlight_level;
-#    endif
-#    ifdef WPM_ENABLE
-    uint8_t current_wpm;
-#    endif
-#    if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
-    led_eeconfig_t led_matrix;
-    bool           led_suspend_state;
-#    endif
-#    if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
-    rgb_config_t rgb_matrix;
-    bool         rgb_suspend_state;
-#    endif
-} Serial_m2s_buffer_t;
-
-#    if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
-// When MCUs on both sides drive their respective RGB LED chains,
-// it is necessary to synchronize, so it is necessary to communicate RGB
-// information. In that case, define RGBLIGHT_SPLIT with info on the number
-// of LEDs on each half.
-//
-// Otherwise, if the master side MCU drives both sides RGB LED chains,
-// there is no need to communicate.
-
-typedef struct _Serial_rgblight_t {
-    rgblight_syncinfo_t rgblight_sync;
-} Serial_rgblight_t;
+static split_shared_memory_t shared_memory;
+split_shared_memory_t *const split_shmem = &shared_memory;
 
-volatile Serial_rgblight_t serial_rgblight = {};
-uint8_t volatile status_rgblight           = 0;
-#    endif
-
-volatile Serial_s2m_buffer_t serial_s2m_buffer = {};
-volatile Serial_m2s_buffer_t serial_m2s_buffer = {};
-uint8_t volatile status0                       = 0;
-
-enum serial_transaction_id {
-    GET_SLAVE_MATRIX = 0,
-#    if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
-    PUT_RGBLIGHT,
-#    endif
-};
-
-SSTD_t transactions[] = {
-    [GET_SLAVE_MATRIX] =
-        {
-            (uint8_t *)&status0,
-            sizeof(serial_m2s_buffer),
-            (uint8_t *)&serial_m2s_buffer,
-            sizeof(serial_s2m_buffer),
-            (uint8_t *)&serial_s2m_buffer,
-        },
-#    if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
-    [PUT_RGBLIGHT] =
-        {
-            (uint8_t *)&status_rgblight, sizeof(serial_rgblight), (uint8_t *)&serial_rgblight, 0, NULL  // no slave to master transfer
-        },
-#    endif
-};
-
-void transport_master_init(void) { soft_serial_initiator_init(transactions, TID_LIMIT(transactions)); }
-
-void transport_slave_init(void) { soft_serial_target_init(transactions, TID_LIMIT(transactions)); }
+void transport_master_init(void) { soft_serial_initiator_init(); }
+void transport_slave_init(void) { soft_serial_target_init(); }
 
-#    if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
-
-// rgblight synchronization information communication.
-
-void transport_rgblight_master(void) {
-    if (rgblight_get_change_flags()) {
-        rgblight_get_syncinfo((rgblight_syncinfo_t *)&serial_rgblight.rgblight_sync);
-        if (soft_serial_transaction(PUT_RGBLIGHT) == TRANSACTION_END) {
-            rgblight_clear_change_flags();
-        }
-    }
-}
-
-void transport_rgblight_slave(void) {
-    if (status_rgblight == TRANSACTION_ACCEPTED) {
-        rgblight_update_sync((rgblight_syncinfo_t *)&serial_rgblight.rgblight_sync, false);
-        status_rgblight = TRANSACTION_END;
+bool transport_execute_transaction(int8_t id, const void *initiator2target_buf, uint16_t initiator2target_length, void *target2initiator_buf, uint16_t target2initiator_length) {
+    split_transaction_desc_t *trans = &split_transaction_table[id];
+    if (initiator2target_length > 0) {
+        size_t len = trans->initiator2target_buffer_size < initiator2target_length ? trans->initiator2target_buffer_size : initiator2target_length;
+        memcpy(split_trans_initiator2target_buffer(trans), initiator2target_buf, len);
     }
-}
 
-#    else
-#        define transport_rgblight_master()
-#        define transport_rgblight_slave()
-#    endif
-
-bool transport_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
-#    ifndef SERIAL_USE_MULTI_TRANSACTION
-    if (soft_serial_transaction() != TRANSACTION_END) {
-        return false;
-    }
-#    else
-    transport_rgblight_master();
-    if (soft_serial_transaction(GET_SLAVE_MATRIX) != TRANSACTION_END) {
+    if (soft_serial_transaction(id) != TRANSACTION_END) {
         return false;
     }
-#    endif
 
-    // TODO:  if MATRIX_COLS > 8 change to unpack()
-    for (int i = 0; i < ROWS_PER_HAND; ++i) {
-        slave_matrix[i] = serial_s2m_buffer.smatrix[i];
-#    ifdef SPLIT_TRANSPORT_MIRROR
-        serial_m2s_buffer.mmatrix[i] = master_matrix[i];
-#    endif
+    if (target2initiator_length > 0) {
+        size_t len = trans->target2initiator_buffer_size < target2initiator_length ? trans->target2initiator_buffer_size : target2initiator_length;
+        memcpy(target2initiator_buf, split_trans_target2initiator_buffer(trans), len);
     }
 
-#    ifdef BACKLIGHT_ENABLE
-    // Write backlight level for slave to read
-    serial_m2s_buffer.backlight_level = is_backlight_enabled() ? get_backlight_level() : 0;
-#    endif
-
-#    ifdef ENCODER_ENABLE
-    encoder_update_raw((uint8_t *)serial_s2m_buffer.encoder_state);
-#    endif
-
-#    ifdef WPM_ENABLE
-    // Write wpm to slave
-    serial_m2s_buffer.current_wpm = get_current_wpm();
-#    endif
-
-#    ifdef SPLIT_MODS_ENABLE
-    serial_m2s_buffer.real_mods = get_mods();
-    serial_m2s_buffer.weak_mods = get_weak_mods();
-#        ifndef NO_ACTION_ONESHOT
-    serial_m2s_buffer.oneshot_mods = get_oneshot_mods();
-#        endif
-#    endif
-
-#    if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
-    serial_m2s_buffer.led_matrix        = led_matrix_eeconfig;
-    serial_m2s_buffer.led_suspend_state = led_matrix_get_suspend_state();
-#    endif
-#    if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
-    serial_m2s_buffer.rgb_matrix        = rgb_matrix_config;
-    serial_m2s_buffer.rgb_suspend_state = rgb_matrix_get_suspend_state();
-#    endif
-
-#    ifndef DISABLE_SYNC_TIMER
-    serial_m2s_buffer.sync_timer = sync_timer_read32() + SYNC_TIMER_OFFSET;
-#    endif
     return true;
 }
 
-void transport_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
-    transport_rgblight_slave();
-#    ifndef DISABLE_SYNC_TIMER
-    sync_timer_update(serial_m2s_buffer.sync_timer);
-#    endif
-
-    // TODO: if MATRIX_COLS > 8 change to pack()
-    for (int i = 0; i < ROWS_PER_HAND; ++i) {
-        serial_s2m_buffer.smatrix[i] = slave_matrix[i];
-#    ifdef SPLIT_TRANSPORT_MIRROR
-        master_matrix[i] = serial_m2s_buffer.mmatrix[i];
-#    endif
-    }
-#    ifdef BACKLIGHT_ENABLE
-    backlight_set(serial_m2s_buffer.backlight_level);
-#    endif
-
-#    ifdef ENCODER_ENABLE
-    encoder_state_raw((uint8_t *)serial_s2m_buffer.encoder_state);
-#    endif
+#endif  // USE_I2C
 
-#    ifdef WPM_ENABLE
-    set_current_wpm(serial_m2s_buffer.current_wpm);
-#    endif
-
-#    ifdef SPLIT_MODS_ENABLE
-    set_mods(serial_m2s_buffer.real_mods);
-    set_weak_mods(serial_m2s_buffer.weak_mods);
-#        ifndef NO_ACTION_ONESHOT
-    set_oneshot_mods(serial_m2s_buffer.oneshot_mods);
-#        endif
-#    endif
-
-#    if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
-    led_matrix_eeconfig = serial_m2s_buffer.led_matrix;
-    led_matrix_set_suspend_state(serial_m2s_buffer.led_suspend_state);
-#    endif
-#    if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
-    rgb_matrix_config = serial_m2s_buffer.rgb_matrix;
-    rgb_matrix_set_suspend_state(serial_m2s_buffer.rgb_suspend_state);
-#    endif
-}
+bool transport_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) { return transactions_master(master_matrix, slave_matrix); }
 
-#endif
+void transport_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) { transactions_slave(master_matrix, slave_matrix); }
\ No newline at end of file
diff --git a/quantum/split_common/transport.h b/quantum/split_common/transport.h
index a9f66301b..2e07f6b25 100644
--- a/quantum/split_common/transport.h
+++ b/quantum/split_common/transport.h
@@ -1,10 +1,175 @@
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #pragma once
 
+#include "stdint.h"
+#include "stdbool.h"
+
+#include "progmem.h"
+#include "action_layer.h"
 #include "matrix.h"
 
+#ifndef RPC_M2S_BUFFER_SIZE
+#    define RPC_M2S_BUFFER_SIZE 32
+#endif  // RPC_M2S_BUFFER_SIZE
+
+#ifndef RPC_S2M_BUFFER_SIZE
+#    define RPC_S2M_BUFFER_SIZE 32
+#endif  // RPC_S2M_BUFFER_SIZE
+
 void transport_master_init(void);
 void transport_slave_init(void);
 
 // returns false if valid data not received from slave
 bool transport_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]);
 void transport_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]);
+
+bool transport_execute_transaction(int8_t id, const void *initiator2target_buf, uint16_t initiator2target_length, void *target2initiator_buf, uint16_t target2initiator_length);
+
+#ifdef ENCODER_ENABLE
+#    include "encoder.h"
+#    define NUMBER_OF_ENCODERS (sizeof((pin_t[])ENCODERS_PAD_A) / sizeof(pin_t))
+#endif  // ENCODER_ENABLE
+
+#ifdef BACKLIGHT_ENABLE
+#    include "backlight.h"
+#endif  // BACKLIGHT_ENABLE
+
+#ifdef RGBLIGHT_ENABLE
+#    include "rgblight.h"
+#endif  // RGBLIGHT_ENABLE
+
+typedef struct _split_slave_matrix_sync_t {
+    uint8_t      checksum;
+    matrix_row_t matrix[(MATRIX_ROWS) / 2];
+} split_slave_matrix_sync_t;
+
+#ifdef SPLIT_TRANSPORT_MIRROR
+typedef struct _split_master_matrix_sync_t {
+    matrix_row_t matrix[(MATRIX_ROWS) / 2];
+} split_master_matrix_sync_t;
+#endif  // SPLIT_TRANSPORT_MIRROR
+
+#ifdef ENCODER_ENABLE
+typedef struct _split_slave_encoder_sync_t {
+    uint8_t checksum;
+    uint8_t state[NUMBER_OF_ENCODERS];
+} split_slave_encoder_sync_t;
+#endif  // ENCODER_ENABLE
+
+#if !defined(NO_ACTION_LAYER) && defined(SPLIT_LAYER_STATE_ENABLE)
+typedef struct _split_layers_sync_t {
+    layer_state_t layer_state;
+    layer_state_t default_layer_state;
+} split_layers_sync_t;
+#endif  // !defined(NO_ACTION_LAYER) && defined(SPLIT_LAYER_STATE_ENABLE)
+
+#if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+#    include "led_matrix.h"
+
+typedef struct _led_matrix_sync_t {
+    led_eeconfig_t led_matrix;
+    bool           led_suspend_state;
+} led_matrix_sync_t;
+#endif  // defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+
+#if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
+#    include "rgb_matrix.h"
+
+typedef struct _rgb_matrix_sync_t {
+    rgb_config_t rgb_matrix;
+    bool         rgb_suspend_state;
+} rgb_matrix_sync_t;
+#endif  // defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
+
+#ifdef SPLIT_MODS_ENABLE
+typedef struct _split_mods_sync_t {
+    uint8_t real_mods;
+    uint8_t weak_mods;
+#    ifndef NO_ACTION_ONESHOT
+    uint8_t oneshot_mods;
+#    endif  // NO_ACTION_ONESHOT
+} split_mods_sync_t;
+#endif  // SPLIT_MODS_ENABLE
+
+#if defined(SPLIT_TRANSACTION_IDS_KB) || defined(SPLIT_TRANSACTION_IDS_USER)
+typedef struct _rpc_sync_info_t {
+    int8_t  transaction_id;
+    uint8_t m2s_length;
+    uint8_t s2m_length;
+} rpc_sync_info_t;
+#endif  // defined(SPLIT_TRANSACTION_IDS_KB) || defined(SPLIT_TRANSACTION_IDS_USER)
+
+typedef struct _split_shared_memory_t {
+#ifdef USE_I2C
+    int8_t transaction_id;
+#endif  // USE_I2C
+
+    split_slave_matrix_sync_t smatrix;
+
+#ifdef SPLIT_TRANSPORT_MIRROR
+    split_master_matrix_sync_t mmatrix;
+#endif  // SPLIT_TRANSPORT_MIRROR
+
+#ifdef ENCODER_ENABLE
+    split_slave_encoder_sync_t encoders;
+#endif  // ENCODER_ENABLE
+
+#ifndef DISABLE_SYNC_TIMER
+    uint32_t sync_timer;
+#endif  // DISABLE_SYNC_TIMER
+
+#if !defined(NO_ACTION_LAYER) && defined(SPLIT_LAYER_STATE_ENABLE)
+    split_layers_sync_t layers;
+#endif  // !defined(NO_ACTION_LAYER) && defined(SPLIT_LAYER_STATE_ENABLE)
+
+#ifdef SPLIT_LED_STATE_ENABLE
+    uint8_t led_state;
+#endif  // SPLIT_LED_STATE_ENABLE
+
+#ifdef SPLIT_MODS_ENABLE
+    split_mods_sync_t mods;
+#endif  // SPLIT_MODS_ENABLE
+
+#ifdef BACKLIGHT_ENABLE
+    uint8_t backlight_level;
+#endif  // BACKLIGHT_ENABLE
+
+#if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
+    rgblight_syncinfo_t rgblight_sync;
+#endif  // defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
+
+#if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+    led_matrix_sync_t led_matrix_sync;
+#endif  // defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+
+#if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
+    rgb_matrix_sync_t rgb_matrix_sync;
+#endif  // defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
+
+#if defined(WPM_ENABLE) && defined(SPLIT_WPM_ENABLE)
+    uint8_t current_wpm;
+#endif  // defined(WPM_ENABLE) && defined(SPLIT_WPM_ENABLE)
+
+#if defined(SPLIT_TRANSACTION_IDS_KB) || defined(SPLIT_TRANSACTION_IDS_USER)
+    rpc_sync_info_t rpc_info;
+    uint8_t         rpc_m2s_buffer[RPC_M2S_BUFFER_SIZE];
+    uint8_t         rpc_s2m_buffer[RPC_S2M_BUFFER_SIZE];
+#endif  // defined(SPLIT_TRANSACTION_IDS_KB) || defined(SPLIT_TRANSACTION_IDS_USER)
+} split_shared_memory_t;
+
+extern split_shared_memory_t *const split_shmem;
\ No newline at end of file
diff --git a/testlist.mk b/testlist.mk
index 0d7609b9f..d256f4c81 100644
--- a/testlist.mk
+++ b/testlist.mk
@@ -1,6 +1,7 @@
 TEST_LIST = $(notdir $(patsubst %/rules.mk,%,$(wildcard $(ROOT_DIR)/tests/*/rules.mk)))
 FULL_TESTS := $(TEST_LIST)
 
+include $(ROOT_DIR)/quantum/debounce/tests/testlist.mk
 include $(ROOT_DIR)/quantum/sequencer/tests/testlist.mk
 include $(ROOT_DIR)/quantum/serial_link/tests/testlist.mk
 
diff --git a/tmk_core/avr.mk b/tmk_core/avr.mk
index eb934ffe6..b787e77ec 100644
--- a/tmk_core/avr.mk
+++ b/tmk_core/avr.mk
@@ -301,7 +301,7 @@ ifneq ($(strip $(BOOTLOADER)), qmk-dfu)
 endif
         make -C lib/lufa/Bootloaders/DFU/ clean
         $(QMK_BIN) generate-dfu-header --quiet --keyboard $(KEYBOARD) --output lib/lufa/Bootloaders/DFU/Keyboard.h
-        $(eval MAX_SIZE=$(shell n=`$(CC) -E -mmcu=$(MCU) $(CFLAGS) $(OPT_DEFS) tmk_core/common/avr/bootloader_size.c 2> /dev/null | sed -ne 's/\r//;/^#/n;/^AVR_SIZE:/,$${s/^AVR_SIZE: //;p;}'` && echo $$(($$n)) || echo 0))
+        $(eval MAX_SIZE=$(shell n=`$(CC) -E -mmcu=$(MCU) -D__ASSEMBLER__ $(CFLAGS) $(OPT_DEFS) tmk_core/common/avr/bootloader_size.c 2> /dev/null | sed -ne 's/\r//;/^#/n;/^AVR_SIZE:/,$${s/^AVR_SIZE: //;p;}'` && echo $$(($$n)) || echo 0))
         $(eval PROGRAM_SIZE_KB=$(shell n=`expr $(MAX_SIZE) / 1024` && echo $$(($$n)) || echo 0))
         $(eval BOOT_SECTION_SIZE_KB=$(shell n=`expr  $(BOOTLOADER_SIZE) / 1024` && echo $$(($$n)) || echo 0))
         $(eval FLASH_SIZE_KB=$(shell n=`expr $(PROGRAM_SIZE_KB) + $(BOOT_SECTION_SIZE_KB)` && echo $$(($$n)) || echo 0))
diff --git a/tmk_core/chibios.mk b/tmk_core/chibios.mk
index 97299b7d3..7eda36046 100644
--- a/tmk_core/chibios.mk
+++ b/tmk_core/chibios.mk
@@ -390,8 +390,10 @@ ifndef TEENSY_LOADER_CLI
     endif
 endif
 
+TEENSY_LOADER_CLI_MCU ?= $(MCU_LDSCRIPT)
+
 define EXEC_TEENSY
-        $(TEENSY_LOADER_CLI) -mmcu=$(MCU_LDSCRIPT) -w -v $(BUILD_DIR)/$(TARGET).hex
+        $(TEENSY_LOADER_CLI) -mmcu=$(TEENSY_LOADER_CLI_MCU) -w -v $(BUILD_DIR)/$(TARGET).hex
 endef
 
 teensy: $(BUILD_DIR)/$(TARGET).hex cpfirmware sizeafter
@@ -408,6 +410,8 @@ else ifeq ($(strip $(BOOTLOADER)),kiibohd)
         $(call EXEC_DFU_UTIL)
 else ifeq ($(strip $(MCU_FAMILY)),KINETIS)
         $(call EXEC_TEENSY)
+else ifeq ($(strip $(MCU_FAMILY)),MIMXRT1062)
+        $(call EXEC_TEENSY)
 else ifeq ($(strip $(MCU_FAMILY)),STM32)
         $(call EXEC_DFU_UTIL)
 else
diff --git a/tmk_core/common/arm_atsam/_timer.h b/tmk_core/common/arm_atsam/_timer.h
new file mode 100644
index 000000000..77402b612
--- /dev/null
+++ b/tmk_core/common/arm_atsam/_timer.h
@@ -0,0 +1,19 @@
+/* Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+// The platform is 32-bit, so prefer 32-bit timers to avoid overflow
+#define FAST_TIMER_T_SIZE 32
diff --git a/tmk_core/common/avr/_timer.h b/tmk_core/common/avr/_timer.h
new file mode 100644
index 000000000..b81e0f68b
--- /dev/null
+++ b/tmk_core/common/avr/_timer.h
@@ -0,0 +1,19 @@
+/* Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+// The platform is 8-bit, so prefer 16-bit timers to reduce code size
+#define FAST_TIMER_T_SIZE 16
diff --git a/tmk_core/common/avr/gpio.h b/tmk_core/common/avr/gpio.h
index 231556c29..e9be68491 100644
--- a/tmk_core/common/avr/gpio.h
+++ b/tmk_core/common/avr/gpio.h
@@ -20,6 +20,8 @@
 
 typedef uint8_t pin_t;
 
+/* Operation of GPIO by pin. */
+
 #define setPinInput(pin) (DDRx_ADDRESS(pin) &= ~_BV((pin)&0xF), PORTx_ADDRESS(pin) &= ~_BV((pin)&0xF))
 #define setPinInputHigh(pin) (DDRx_ADDRESS(pin) &= ~_BV((pin)&0xF), PORTx_ADDRESS(pin) |= _BV((pin)&0xF))
 #define setPinInputLow(pin) _Static_assert(0, "AVR processors cannot implement an input as pull low")
@@ -32,3 +34,16 @@ typedef uint8_t pin_t;
 #define readPin(pin) ((bool)(PINx_ADDRESS(pin) & _BV((pin)&0xF)))
 
 #define togglePin(pin) (PORTx_ADDRESS(pin) ^= _BV((pin)&0xF))
+
+/* Operation of GPIO by port. */
+
+typedef uint8_t port_data_t;
+
+#define readPort(port) PINx_ADDRESS(port)
+
+#define setPortBitInput(port, bit) (DDRx_ADDRESS(port) &= ~_BV((bit)&0xF), PORTx_ADDRESS(port) &= ~_BV((bit)&0xF))
+#define setPortBitInputHigh(port, bit) (DDRx_ADDRESS(port) &= ~_BV((bit)&0xF), PORTx_ADDRESS(port) |= _BV((bit)&0xF))
+#define setPortBitOutput(port, bit) (DDRx_ADDRESS(port) |= _BV((bit)&0xF))
+
+#define writePortBitLow(port, bit) (PORTx_ADDRESS(port) &= ~_BV((bit)&0xF))
+#define writePortBitHigh(port, bit) (PORTx_ADDRESS(port) |= _BV((bit)&0xF))
diff --git a/tmk_core/common/chibios/_timer.h b/tmk_core/common/chibios/_timer.h
new file mode 100644
index 000000000..77402b612
--- /dev/null
+++ b/tmk_core/common/chibios/_timer.h
@@ -0,0 +1,19 @@
+/* Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+// The platform is 32-bit, so prefer 32-bit timers to avoid overflow
+#define FAST_TIMER_T_SIZE 32
diff --git a/tmk_core/common/chibios/bootloader.c b/tmk_core/common/chibios/bootloader.c
index 11f7abf43..76d52ea60 100644
--- a/tmk_core/common/chibios/bootloader.c
+++ b/tmk_core/common/chibios/bootloader.c
@@ -95,7 +95,7 @@ void enter_bootloader_mode_if_requested(void) {
     }
 }
 
-#elif defined(KL2x) || defined(K20x) || defined(MK66F18)  // STM32_BOOTLOADER_DUAL_BANK // STM32_BOOTLOADER_ADDRESS
+#elif defined(KL2x) || defined(K20x) || defined(MK66F18) || defined(MIMXRT1062)  // STM32_BOOTLOADER_DUAL_BANK // STM32_BOOTLOADER_ADDRESS
 /* Kinetis */
 
 #    if defined(BOOTLOADER_KIIBOHD)
diff --git a/tmk_core/common/chibios/gpio.h b/tmk_core/common/chibios/gpio.h
index 5d0e142ab..4d057f1ca 100644
--- a/tmk_core/common/chibios/gpio.h
+++ b/tmk_core/common/chibios/gpio.h
@@ -20,6 +20,8 @@
 
 typedef ioline_t pin_t;
 
+/* Operation of GPIO by pin. */
+
 #define setPinInput(pin) palSetLineMode(pin, PAL_MODE_INPUT)
 #define setPinInputHigh(pin) palSetLineMode(pin, PAL_MODE_INPUT_PULLUP)
 #define setPinInputLow(pin) palSetLineMode(pin, PAL_MODE_INPUT_PULLDOWN)
@@ -32,3 +34,17 @@ typedef ioline_t pin_t;
 #define readPin(pin) palReadLine(pin)
 
 #define togglePin(pin) palToggleLine(pin)
+
+/* Operation of GPIO by port. */
+
+typedef uint16_t port_data_t;
+
+#define readPort(pin) palReadPort(PAL_PORT(pin))
+
+#define setPortBitInput(pin, bit) palSetPadMode(PAL_PORT(pin), bit, PAL_MODE_INPUT)
+#define setPortBitInputHigh(pin, bit) palSetPadMode(PAL_PORT(pin), bit, PAL_MODE_INPUT_PULLUP)
+#define setPortBitInputLow(pin, bit) palSetPadMode(PAL_PORT(pin), bit, PAL_MODE_INPUT_PULLDOWN)
+#define setPortBitOutput(pin, bit) palSetPadMode(PAL_PORT(pin), bit, PAL_MODE_OUTPUT_PUSHPULL)
+
+#define writePortBitLow(pin, bit) palClearLine(PAL_LINE(PAL_PORT(pin), bit))
+#define writePortBitHigh(pin, bit) palSetLine(PAL_LINE(PAL_PORT(pin), bit))
diff --git a/tmk_core/common/host.c b/tmk_core/common/host.c
index e7d92cfac..a8b391e89 100644
--- a/tmk_core/common/host.c
+++ b/tmk_core/common/host.c
@@ -17,6 +17,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include <stdint.h>
 //#include <avr/interrupt.h>
+#include "keyboard.h"
 #include "keycode.h"
 #include "host.h"
 #include "util.h"
@@ -35,15 +36,20 @@ void host_set_driver(host_driver_t *d) { driver = d; }
 
 host_driver_t *host_get_driver(void) { return driver; }
 
+#ifdef SPLIT_KEYBOARD
+uint8_t split_led_state = 0;
+void    set_split_host_keyboard_leds(uint8_t led_state) { split_led_state = led_state; }
+#endif
+
 uint8_t host_keyboard_leds(void) {
+#ifdef SPLIT_KEYBOARD
+    if (!is_keyboard_master()) return split_led_state;
+#endif
     if (!driver) return 0;
     return (*driver->keyboard_leds)();
 }
 
-led_t host_keyboard_led_state(void) {
-    if (!driver) return (led_t){0};
-    return (led_t)((*driver->keyboard_leds)());
-}
+led_t host_keyboard_led_state(void) { return (led_t)host_keyboard_leds(); }
 
 /* send report */
 void host_keyboard_send(report_keyboard_t *report) {
diff --git a/tmk_core/common/keyboard.c b/tmk_core/common/keyboard.c
index 3d6092e71..28fa97bc8 100644
--- a/tmk_core/common/keyboard.c
+++ b/tmk_core/common/keyboard.c
@@ -85,6 +85,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifdef OLED_DRIVER_ENABLE
 #    include "oled_driver.h"
 #endif
+#ifdef ST7565_ENABLE
+#    include "st7565.h"
+#endif
 #ifdef VELOCIKEY_ENABLE
 #    include "velocikey.h"
 #endif
@@ -100,6 +103,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifdef EEPROM_DRIVER
 #    include "eeprom_driver.h"
 #endif
+#if defined(CRC_ENABLE)
+#    include "crc.h"
+#endif
 
 static uint32_t last_input_modification_time = 0;
 uint32_t        last_input_activity_time(void) { return last_input_modification_time; }
@@ -297,6 +303,9 @@ void keyboard_init(void) {
     timer_init();
     sync_timer_init();
     matrix_init();
+#if defined(CRC_ENABLE)
+    crc_init();
+#endif
 #ifdef VIA_ENABLE
     via_init();
 #endif
@@ -306,6 +315,9 @@ void keyboard_init(void) {
 #ifdef OLED_DRIVER_ENABLE
     oled_init(OLED_ROTATION_0);
 #endif
+#ifdef ST7565_ENABLE
+    st7565_init(DISPLAY_ROTATION_0);
+#endif
 #ifdef PS2_MOUSE_ENABLE
     ps2_mouse_init();
 #endif
@@ -470,6 +482,18 @@ MATRIX_LOOP_END:
 #    endif
 #endif
 
+#ifdef ST7565_ENABLE
+    st7565_task();
+#    ifndef ST7565_DISABLE_TIMEOUT
+    // Wake up display if user is using those fabulous keys or spinning those encoders!
+#        ifdef ENCODER_ENABLE
+    if (matrix_changed || encoders_changed) st7565_on();
+#        else
+    if (matrix_changed) st7565_on();
+#        endif
+#    endif
+#endif
+
 #ifdef MOUSEKEY_ENABLE
     // mousekey repeat & acceleration
     mousekey_task();
diff --git a/tmk_core/common/sync_timer.c b/tmk_core/common/sync_timer.c
index de24b463b..68b92d8b4 100644
--- a/tmk_core/common/sync_timer.c
+++ b/tmk_core/common/sync_timer.c
@@ -26,7 +26,7 @@ SOFTWARE.
 #include "sync_timer.h"
 #include "keyboard.h"
 
-#if defined(SPLIT_KEYBOARD) && !defined(DISABLE_SYNC_TIMER)
+#if (defined(SPLIT_KEYBOARD) || defined(SERIAL_LINK_ENABLE)) && !defined(DISABLE_SYNC_TIMER)
 volatile int32_t sync_timer_ms;
 
 void sync_timer_init(void) { sync_timer_ms = 0; }
diff --git a/tmk_core/common/sync_timer.h b/tmk_core/common/sync_timer.h
index 9ddef45bb..744e2b50d 100644
--- a/tmk_core/common/sync_timer.h
+++ b/tmk_core/common/sync_timer.h
@@ -32,7 +32,7 @@ SOFTWARE.
 extern "C" {
 #endif
 
-#if defined(SPLIT_KEYBOARD) && !defined(DISABLE_SYNC_TIMER)
+#if (defined(SPLIT_KEYBOARD) || defined(SERIAL_LINK_ENABLE)) && !defined(DISABLE_SYNC_TIMER)
 void     sync_timer_init(void);
 void     sync_timer_update(uint32_t time);
 uint16_t sync_timer_read(void);
diff --git a/tmk_core/common/timer.h b/tmk_core/common/timer.h
index 58f637dd9..928811a2b 100644
--- a/tmk_core/common/timer.h
+++ b/tmk_core/common/timer.h
@@ -1,5 +1,6 @@
 /*
 Copyright 2011 Jun Wako <wakojun@gmail.com>
+Copyright 2021 Simon Arlott
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -17,13 +18,13 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
+#if __has_include_next("_timer.h")
+#    include_next "_timer.h" /* Include the platform's _timer.h */
+#endif
+
 #include <stdint.h>
 #include <stdbool.h>
 
-#if defined(__AVR__)
-#    include "avr/timer_avr.h"
-#endif
-
 #define TIMER_DIFF(a, b, max) ((max == UINT8_MAX) ? ((uint8_t)((a) - (b))) : ((max == UINT16_MAX) ? ((uint16_t)((a) - (b))) : ((max == UINT32_MAX) ? ((uint32_t)((a) - (b))) : ((a) >= (b) ? (a) - (b) : (max) + 1 - (b) + (a)))))
 #define TIMER_DIFF_8(a, b) TIMER_DIFF(a, b, UINT8_MAX)
 #define TIMER_DIFF_16(a, b) TIMER_DIFF(a, b, UINT16_MAX)
@@ -47,6 +48,21 @@ uint32_t timer_elapsed32(uint32_t last);
 #define timer_expired(current, future) ((uint16_t)(current - future) < UINT16_MAX / 2)
 #define timer_expired32(current, future) ((uint32_t)(current - future) < UINT32_MAX / 2)
 
+// Use an appropriate timer integer size based on architecture (16-bit will overflow sooner)
+#if FAST_TIMER_T_SIZE < 32
+#    define TIMER_DIFF_FAST(a, b) TIMER_DIFF_16(a, b)
+#    define timer_expired_fast(current, future) timer_expired(current, future)
+typedef uint16_t fast_timer_t;
+fast_timer_t inline timer_read_fast(void) { return timer_read(); }
+fast_timer_t inline timer_elapsed_fast(fast_timer_t last) { return timer_elapsed(last); }
+#else
+#    define TIMER_DIFF_FAST(a, b) TIMER_DIFF_32(a, b)
+#    define timer_expired_fast(current, future) timer_expired32(current, future)
+typedef uint32_t fast_timer_t;
+fast_timer_t inline timer_read_fast(void) { return timer_read32(); }
+fast_timer_t inline timer_elapsed_fast(fast_timer_t last) { return timer_elapsed32(last); }
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/tmk_core/protocol/chibios/usb_main.c b/tmk_core/protocol/chibios/usb_main.c
index d04302aca..407b8ea75 100644
--- a/tmk_core/protocol/chibios/usb_main.c
+++ b/tmk_core/protocol/chibios/usb_main.c
@@ -903,7 +903,8 @@ static void send_extra(uint8_t report_id, uint16_t data) {
         return;
     }
 
-    report_extra_t report = {.report_id = report_id, .usage = data};
+    static report_extra_t report;
+    report = (report_extra_t){.report_id = report_id, .usage = data};
 
     usbStartTransmitI(&USB_DRIVER, SHARED_IN_EPNUM, (uint8_t *)&report, sizeof(report_extra_t));
     osalSysUnlock();
@@ -1051,45 +1052,44 @@ void virtser_task(void) {
 #ifdef JOYSTICK_ENABLE
 
 void send_joystick_packet(joystick_t *joystick) {
-    joystick_report_t rep = {
+    static joystick_report_t rep;
+    rep = (joystick_report_t) {
 #    if JOYSTICK_AXES_COUNT > 0
         .axes =
-            {
-                joystick->axes[0],
+        { joystick->axes[0],
 
 #        if JOYSTICK_AXES_COUNT >= 2
-                joystick->axes[1],
+          joystick->axes[1],
 #        endif
 #        if JOYSTICK_AXES_COUNT >= 3
-                joystick->axes[2],
+          joystick->axes[2],
 #        endif
 #        if JOYSTICK_AXES_COUNT >= 4
-                joystick->axes[3],
+          joystick->axes[3],
 #        endif
 #        if JOYSTICK_AXES_COUNT >= 5
-                joystick->axes[4],
+          joystick->axes[4],
 #        endif
 #        if JOYSTICK_AXES_COUNT >= 6
-                joystick->axes[5],
+          joystick->axes[5],
 #        endif
-            },
+        },
 #    endif  // JOYSTICK_AXES_COUNT>0
 
 #    if JOYSTICK_BUTTON_COUNT > 0
-        .buttons =
-            {
-                joystick->buttons[0],
+        .buttons = {
+            joystick->buttons[0],
 
 #        if JOYSTICK_BUTTON_COUNT > 8
-                joystick->buttons[1],
+            joystick->buttons[1],
 #        endif
 #        if JOYSTICK_BUTTON_COUNT > 16
-                joystick->buttons[2],
+            joystick->buttons[2],
 #        endif
 #        if JOYSTICK_BUTTON_COUNT > 24
-                joystick->buttons[3],
+            joystick->buttons[3],
 #        endif
-            }
+        }
 #    endif  // JOYSTICK_BUTTON_COUNT>0
     };
 
diff --git a/tmk_core/protocol/lufa/lufa.c b/tmk_core/protocol/lufa/lufa.c
index 63619fdb3..4ac079e16 100644
--- a/tmk_core/protocol/lufa/lufa.c
+++ b/tmk_core/protocol/lufa/lufa.c
@@ -314,45 +314,44 @@ static void Console_Task(void) {
 void send_joystick_packet(joystick_t *joystick) {
     uint8_t timeout = 255;
 
-    joystick_report_t r = {
+    static joystick_report_t;
+    r = (joystick_report_t) {
 #    if JOYSTICK_AXES_COUNT > 0
         .axes =
-            {
-                joystick->axes[0],
+        { joystick->axes[0],
 
 #        if JOYSTICK_AXES_COUNT >= 2
-                joystick->axes[1],
+          joystick->axes[1],
 #        endif
 #        if JOYSTICK_AXES_COUNT >= 3
-                joystick->axes[2],
+          joystick->axes[2],
 #        endif
 #        if JOYSTICK_AXES_COUNT >= 4
-                joystick->axes[3],
+          joystick->axes[3],
 #        endif
 #        if JOYSTICK_AXES_COUNT >= 5
-                joystick->axes[4],
+          joystick->axes[4],
 #        endif
 #        if JOYSTICK_AXES_COUNT >= 6
-                joystick->axes[5],
+          joystick->axes[5],
 #        endif
-            },
+        },
 #    endif  // JOYSTICK_AXES_COUNT>0
 
 #    if JOYSTICK_BUTTON_COUNT > 0
-        .buttons =
-            {
-                joystick->buttons[0],
+        .buttons = {
+            joystick->buttons[0],
 
 #        if JOYSTICK_BUTTON_COUNT > 8
-                joystick->buttons[1],
+            joystick->buttons[1],
 #        endif
 #        if JOYSTICK_BUTTON_COUNT > 16
-                joystick->buttons[2],
+            joystick->buttons[2],
 #        endif
 #        if JOYSTICK_BUTTON_COUNT > 24
-                joystick->buttons[3],
+            joystick->buttons[3],
 #        endif
-            }
+        }
 #    endif  // JOYSTICK_BUTTON_COUNT>0
     };
 
@@ -768,7 +767,8 @@ static void send_extra(uint8_t report_id, uint16_t data) {
 
     if (USB_DeviceState != DEVICE_STATE_Configured) return;
 
-    report_extra_t r = {.report_id = report_id, .usage = data};
+    static report_extra_t r;
+    r = (report_extra_t){.report_id = report_id, .usage = data};
     Endpoint_SelectEndpoint(SHARED_IN_EPNUM);
 
     /* Check if write ready for a polling interval around 10ms */
diff --git a/tmk_core/protocol/usb_descriptor.c b/tmk_core/protocol/usb_descriptor.c
index ba7760f28..c88aceb6e 100644
--- a/tmk_core/protocol/usb_descriptor.c
+++ b/tmk_core/protocol/usb_descriptor.c
@@ -351,7 +351,7 @@ const USB_Descriptor_Device_t PROGMEM DeviceDescriptor = {
         .Size                   = sizeof(USB_Descriptor_Device_t),
         .Type                   = DTYPE_Device
     },
-    .USBSpecification           = VERSION_BCD(1, 1, 0),
+    .USBSpecification           = VERSION_BCD(2, 0, 0),
 
 #if VIRTSER_ENABLE
     .Class                      = USB_CSCP_IADDeviceClass,
diff --git a/tmk_core/protocol/vusb/vusb.c b/tmk_core/protocol/vusb/vusb.c
index 9362fbde7..876a31378 100644
--- a/tmk_core/protocol/vusb/vusb.c
+++ b/tmk_core/protocol/vusb/vusb.c
@@ -272,7 +272,8 @@ static void send_extra(uint8_t report_id, uint16_t data) {
     last_id   = report_id;
     last_data = data;
 
-    report_extra_t report = {.report_id = report_id, .usage = data};
+    static report_extra_t report;
+    report = (report_extra_t){.report_id = report_id, .usage = data};
     if (usbInterruptIsReadyShared()) {
         usbSetInterruptShared((void *)&report, sizeof(report_extra_t));
     }
diff --git a/tmk_core/rules.mk b/tmk_core/rules.mk
index fc2dc68be..597f7aa82 100644
--- a/tmk_core/rules.mk
+++ b/tmk_core/rules.mk
@@ -458,7 +458,7 @@ ifeq ($(findstring avr-gcc,$(CC)),avr-gcc)
 SIZE_MARGIN = 1024
 
 check-size:
-        $(eval MAX_SIZE=$(shell n=`$(CC) -E -mmcu=$(MCU) $(CFLAGS) $(OPT_DEFS) tmk_core/common/avr/bootloader_size.c 2> /dev/null | sed -ne 's/\r//;/^#/n;/^AVR_SIZE:/,$${s/^AVR_SIZE: //;p;}'` && echo $$(($$n)) || echo 0))
+        $(eval MAX_SIZE=$(shell n=`$(CC) -E -mmcu=$(MCU) -D__ASSEMBLER__ $(CFLAGS) $(OPT_DEFS) tmk_core/common/avr/bootloader_size.c 2> /dev/null | sed -ne 's/\r//;/^#/n;/^AVR_SIZE:/,$${s/^AVR_SIZE: //;p;}'` && echo $$(($$n)) || echo 0))
         $(eval CURRENT_SIZE=$(shell if [ -f $(BUILD_DIR)/$(TARGET).hex ]; then $(SIZE) --target=$(FORMAT) $(BUILD_DIR)/$(TARGET).hex | $(AWK) 'NR==2 {print $$4}'; else printf 0; fi))
         $(eval FREE_SIZE=$(shell expr $(MAX_SIZE) - $(CURRENT_SIZE)))
         $(eval OVER_SIZE=$(shell expr $(CURRENT_SIZE) - $(MAX_SIZE)))
diff --git a/users/bcat/config.h b/users/bcat/config.h
index 16188950e..5bb93f383 100644
--- a/users/bcat/config.h
+++ b/users/bcat/config.h
@@ -33,7 +33,7 @@
 
 #if defined(RGB_MATRIX_ENABLE)
 /* Turn off per-key RGB when the host goes to sleep. */
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED
 
 /* Keep per-key RGB increments consistent across keyboards. */
 #    undef RGB_MATRIX_HUE_STEP
diff --git a/users/bocaj/config.h b/users/bocaj/config.h
index 2a44aabfc..ecfb09c6f 100644
--- a/users/bocaj/config.h
+++ b/users/bocaj/config.h
@@ -28,7 +28,7 @@
 // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (not recommened)
 #    define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true  // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED  // turn off effects when suspended
 // #   define RGB_MATRIX_MAXIMUM_BRIGHTNESS 200 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
 // #   define EECONFIG_RGB_MATRIX (uint32_t *)16
 
diff --git a/users/curry/config.h b/users/curry/config.h
index b982dab03..e3c0a103e 100644
--- a/users/curry/config.h
+++ b/users/curry/config.h
@@ -17,7 +17,7 @@
 #if defined(RGB_MATRIX_ENABLE)
 #    define RGB_MATRIX_KEYPRESSES
 #    define RGB_MATRIX_FRAMEBUFFER_EFFECTS
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED
 
 #    define DISABLE_RGB_MATRIX_ALPHAS_MODS
 #    define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN
diff --git a/users/drashna/config.h b/users/drashna/config.h
index 5f7c32ff3..796485689 100644
--- a/users/drashna/config.h
+++ b/users/drashna/config.h
@@ -65,7 +65,7 @@
 // #   define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (not recommened)
 #    define RGB_MATRIX_FRAMEBUFFER_EFFECTS
 // #   define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
-#    define RGB_DISABLE_WHEN_USB_SUSPENDED true  // turn off effects when suspended
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED  // turn off effects when suspended
 // #   define RGB_MATRIX_MAXIMUM_BRIGHTNESS 200 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
 // #   define EECONFIG_RGB_MATRIX (uint32_t *)16
 
diff --git a/users/drashna/drashna.h b/users/drashna/drashna.h
index e66f10657..e37c73bb2 100644
--- a/users/drashna/drashna.h
+++ b/users/drashna/drashna.h
@@ -33,7 +33,7 @@
 #    include "oled_stuff.h"
 #endif
 #if defined(PIMORONI_TRACKBALL_ENABLE)
-#    include "pimoroni_trackball.h"
+#    include "drivers/sensors/pimoroni_trackball.h"
 #endif
 
 /* Define layer names */
diff --git a/users/drashna/pimoroni_trackball.c b/users/drashna/pimoroni_trackball.c
deleted file mode 100644
index a6ca6c996..000000000
--- a/users/drashna/pimoroni_trackball.c
+++ /dev/null
@@ -1,151 +0,0 @@
-/* Copyright 2020 Christopher Courtney, aka Drashna Jael're  (@drashna) <drashna@live.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "pimoroni_trackball.h"
-#include "i2c_master.h"
-
-static uint8_t scrolling      = 0;
-static int16_t x_offset       = 0;
-static int16_t y_offset       = 0;
-static int16_t h_offset       = 0;
-static int16_t v_offset       = 0;
-static float   precisionSpeed = 1;
-
-#ifndef I2C_TIMEOUT
-#    define I2C_TIMEOUT 100
-#endif
-#ifndef MOUSE_DEBOUNCE
-#    define MOUSE_DEBOUNCE 5
-#endif
-
-void trackball_set_rgbw(uint8_t red, uint8_t green, uint8_t blue, uint8_t white) {
-    uint8_t data[] = {0x00, red, green, blue, white};
-    i2c_transmit(TRACKBALL_ADDRESS << 1, data, sizeof(data), I2C_TIMEOUT);
-}
-
-int16_t mouse_offset(uint8_t positive, uint8_t negative, int16_t scale) {
-    int16_t offset    = (int16_t)positive - (int16_t)negative;
-    int16_t magnitude = (int16_t)(scale * offset * offset * precisionSpeed);
-    return offset < 0 ? -magnitude : magnitude;
-}
-
-void update_member(int8_t* member, int16_t* offset) {
-    if (*offset > 127) {
-        *member = 127;
-        *offset -= 127;
-    } else if (*offset < -127) {
-        *member = -127;
-        *offset += 127;
-    } else {
-        *member = *offset;
-        *offset = 0;
-    }
-}
-
-__attribute__((weak)) void trackball_check_click(bool pressed, report_mouse_t* mouse) {
-    if (pressed) {
-        mouse->buttons |= MOUSE_BTN1;
-    } else {
-        mouse->buttons &= ~MOUSE_BTN1;
-    }
-}
-
-void trackball_register_button(bool pressed, enum mouse_buttons button) {
-    report_mouse_t currentReport = pointing_device_get_report();
-    if (pressed) {
-        currentReport.buttons |= button;
-    } else {
-        currentReport.buttons &= ~button;
-    }
-    pointing_device_set_report(currentReport);
-}
-
-float trackball_get_precision(void) { return precisionSpeed; }
-void  trackball_set_precision(float precision) { precisionSpeed = precision; }
-bool  trackball_is_scrolling(void) { return scrolling; }
-void  trackball_set_scrolling(bool scroll) { scrolling = scroll; }
-
-bool has_report_changed (report_mouse_t first, report_mouse_t second) {
-    return !(
-        (!first.buttons && first.buttons == second.buttons) &&
-        (!first.x && first.x == second.x) &&
-        (!first.y && first.y == second.y) &&
-        (!first.h && first.h == second.h) &&
-        (!first.v && first.v == second.v) );
-}
-
-
-__attribute__((weak)) void pointing_device_init(void) { trackball_set_rgbw(0x00, 0x00, 0x00, 0x4F); }
-
-void pointing_device_task(void) {
-    static bool     debounce;
-    static uint16_t debounce_timer;
-    uint8_t         state[5] = {};
-    if (i2c_readReg(TRACKBALL_ADDRESS << 1, 0x04, state, 5, I2C_TIMEOUT) == I2C_STATUS_SUCCESS) {
-        if (!state[4] && !debounce) {
-            if (scrolling) {
-#ifdef PIMORONI_TRACKBALL_INVERT_X
-                h_offset += mouse_offset(state[2], state[3], 1);
-#else
-                h_offset -= mouse_offset(state[2], state[3], 1);
-#endif
-#ifdef PIMORONI_TRACKBALL_INVERT_Y
-                v_offset += mouse_offset(state[1], state[0], 1);
-#else
-                v_offset -= mouse_offset(state[1], state[0], 1);
-#endif
-            } else {
-#ifdef PIMORONI_TRACKBALL_INVERT_X
-                x_offset -= mouse_offset(state[2], state[3], 5);
-#else
-                x_offset += mouse_offset(state[2], state[3], 5);
-#endif
-#ifdef PIMORONI_TRACKBALL_INVERT_Y
-                y_offset -= mouse_offset(state[1], state[0], 5);
-#else
-                y_offset += mouse_offset(state[1], state[0], 5);
-#endif
-            }
-        } else {
-            if (state[4]) {
-                debounce       = true;
-                debounce_timer = timer_read();
-            }
-        }
-    }
-
-    if (timer_elapsed(debounce_timer) > MOUSE_DEBOUNCE) debounce = false;
-
-    report_mouse_t mouse = pointing_device_get_report();
-
-    trackball_check_click(state[4] & (1 << 7), &mouse);
-
-#ifndef PIMORONI_TRACKBALL_ROTATE
-    update_member(&mouse.x, &x_offset);
-    update_member(&mouse.y, &y_offset);
-    update_member(&mouse.h, &h_offset);
-    update_member(&mouse.v, &v_offset);
-#else
-    update_member(&mouse.x, &y_offset);
-    update_member(&mouse.y, &x_offset);
-    update_member(&mouse.h, &v_offset);
-    update_member(&mouse.v, &h_offset);
-#endif
-    pointing_device_set_report(mouse);
-    if (has_report_changed(mouse, pointing_device_get_report())) {
-        pointing_device_send();
-    }
-}
diff --git a/users/drashna/rules.mk b/users/drashna/rules.mk
index b79051508..fa4fb2420 100644
--- a/users/drashna/rules.mk
+++ b/users/drashna/rules.mk
@@ -74,7 +74,7 @@ endif
 ifeq ($(strip $(PIMORONI_TRACKBALL_ENABLE)), yes)
     POINTING_DEVICE_ENABLE := yes
     OPT_DEFS += -DPIMORONI_TRACKBALL_ENABLE
-    SRC += pimoroni_trackball.c
+    SRC += drivers/sensors/pimoroni_trackball.c
     QUANTUM_LIB_SRC += i2c_master.c
 endif
 
diff --git a/users/spidey3/config.h b/users/spidey3/config.h
index 7062fde03..f5f5e07f0 100644
--- a/users/spidey3/config.h
+++ b/users/spidey3/config.h
@@ -1,7 +1,7 @@
 #pragma once
 
-#define LED_DISABLE_WHEN_USB_SUSPENDED true
-#define RGB_DISABLE_WHEN_USB_SUSPENDED true
+#define LED_DISABLE_WHEN_USB_SUSPENDED
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
 #define RGBLIGHT_LAYERS
 #define RGBLIGHT_MAX_LAYERS 17
 #define RGBLIGHT_LAYER_BLINK
diff --git a/users/tominabox1/config.h b/users/tominabox1/config.h
index 2a8c1e943..004f58ab5 100644
--- a/users/tominabox1/config.h
+++ b/users/tominabox1/config.h
@@ -31,7 +31,7 @@
 // RGB_Matrix settings
 #ifdef RGB_MATRIX_ENABLE
   #define RGB_MATRIX_KEYPRESSES // reacts to keypresses
-  #define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
+  #define RGB_DISABLE_WHEN_USB_SUSPENDED // turn off effects when suspended
   #define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
   #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150 // limits maximum brightness of LEDs to 150 out of 255. Higher may cause the controller to crash.
   #define RGB_MATRIX_HUE_STEP 8
diff --git a/util/update_chibios_mirror.sh b/util/update_chibios_mirror.sh
new file mode 100755
index 000000000..3df689f54
--- /dev/null
+++ b/util/update_chibios_mirror.sh
@@ -0,0 +1,55 @@
+#!/bin/bash
+
+################################
+# Configuration
+
+# The branches to mirror
+branches="trunk stable_20.3.x stable_21.6.x"
+
+# The tags to mirror
+tags="ver19.1.3 ver20.3.1 ver20.3.2 ver20.3.3 ver21.6.0"
+
+################################
+# Actions
+
+set -eEuo pipefail
+umask 022
+
+this_script="$(realpath "${BASH_SOURCE[0]}")"
+script_dir="$(realpath "$(dirname "$this_script")")"
+qmk_firmware_dir="$(realpath "$script_dir/../")"
+chibios_dir="$qmk_firmware_dir/lib/chibios"
+
+chibios_git_location=$(realpath "$chibios_dir/$(cat "$chibios_dir/.git" | awk '/gitdir:/ {print $2}')")
+chibios_git_config=$(realpath "$chibios_git_location/config")
+
+cd "$chibios_dir"
+
+if [[ -z "$(cat "$chibios_git_config" | grep '\[svn-remote "svn"\]')" ]] ; then
+    git svn init --stdlayout --prefix='svn/' http://svn.osdn.net/svnroot/chibios/
+fi
+
+if [[ -z "$(cat "$chibios_git_config" | grep '\[remote "qmk"\]')" ]] ; then
+    git remote add qmk git@github.com:qmk/ChibiOS.git
+    git remote set-url qmk git@github.com:qmk/ChibiOS.git --push
+fi
+
+echo "Updating remotes..."
+git fetch --all --tags --prune
+
+echo "Fetching latest from subversion..."
+git svn fetch
+
+echo "Updating branches..."
+for branch in $branches ; do
+    echo "Creating branch 'svn-mirror/$branch' from 'svn/$branch'..."
+    git branch -f svn-mirror/$branch svn/$branch \
+        && git push qmk svn-mirror/$branch
+done
+
+echo "Updating tags..."
+for tagname in $tags ; do
+    echo "Creating tag 'svn-mirror/$tagname' from 'svn/tags/$tagname'..."
+    GIT_COMMITTER_DATE="$(git log -n1 --pretty=format:'%ad' svn/tags/$tagname)" git tag -f -a -m "Tagging $tagname" svn-mirror/$tagname svn/tags/$tagname
+    git push qmk svn-mirror/$tagname
+done
\ No newline at end of file