20 files changed, 711 insertions, 135 deletions
diff --git a/docs/ChangeLog/20210529/PR12172.md b/docs/ChangeLog/20210529/PR12172.md
new file mode 100644
index 000000000..0c355c151
--- /dev/null
+++ b/docs/ChangeLog/20210529/PR12172.md
@@ -0,0 +1,13 @@
+## Bootmagic Deprecation and Refactor ([#12172](https://github.com/qmk/qmk_firmware/pull/12172))
+QMK has decided to deprecate the full Bootmagic feature and leave Bootmagic Lite as the only remaining option.
+This pull request changes the behavior of `BOOTMAGIC_ENABLE` such that specifying `BOOTMAGIC_ENABLE = yes` enables Bootmagic Lite instead of full Bootmagic.
+### Tentative Deprecation Schedule
+This is the current planned roadmap for the behavior of `BOOTMAGIC_ENABLE`:
+- From 2021-05-29, setting `BOOTMAGIC_ENABLE = yes` will enable Bootmagic Lite instead of full Bootmagic.
+- From 2021-08-28, `BOOTMAGIC_ENABLE` must be either `yes`, `lite`, or `no` – setting `BOOTMAGIC_ENABLE = full` will cause compilation to fail.
+- From 2021-11-27, `BOOTMAGIC_ENABLE` must be either `yes` or `no` – setting `BOOTMAGIC_ENABLE = lite` will cause compilation to fail.
diff --git a/docs/adc_driver.md b/docs/adc_driver.md
index 6e3d51386..69fff4b3c 100644
--- a/docs/adc_driver.md
+++ b/docs/adc_driver.md
@@ -47,73 +47,79 @@ Note that some of these pins are doubled-up on ADCs with the same channel. This
 Also note that the F0 and F3 use different numbering schemes. The F0 has a single ADC and the channels are 0-indexed, whereas the F3 has 4 ADCs and the channels are 1-indexed. This is because the F0 uses the `ADCv1` implementation of the ADC, whereas the F3 uses the `ADCv3` implementation.
-|ADC|Channel|STM32F0xx|STM32F3xx|
+|ADC|Channel|STM32F0xx|STM32F1xx|STM32F3xx|STM32F4xx|
-|---|-------|---------|---------|
+|---|-------|---------|---------|---------|---------|
-|1  |0      |`A0`     |         |
+|1  |0      |`A0`     |`A0`     |         |`A0`     |
-|1  |1      |`A1`     |`A0`     |
+|1  |1      |`A1`     |`A1`     |`A0`     |`A1`     |
-|1  |2      |`A2`     |`A1`     |
+|1  |2      |`A2`     |`A2`     |`A1`     |`A2`     |
-|1  |3      |`A3`     |`A2`     |
+|1  |3      |`A3`     |`A3`     |`A2`     |`A3`     |
-|1  |4      |`A4`     |`A3`     |
+|1  |4      |`A4`     |`A4`     |`A3`     |`A4`     |
-|1  |5      |`A5`     |`F4`     |
+|1  |5      |`A5`     |`A5`     |`F4`     |`A5`     |
-|1  |6      |`A6`     |`C0`     |
+|1  |6      |`A6`     |`A6`     |`C0`     |`A6`     |
-|1  |7      |`A7`     |`C1`     |
+|1  |7      |`A7`     |`A7`     |`C1`     |`A7`     |
-|1  |8      |`B0`     |`C2`     |
+|1  |8      |`B0`     |`B0`     |`C2`     |`B0`     |
-|1  |9      |`B1`     |`C3`     |
+|1  |9      |`B1`     |`B1`     |`C3`     |`B1`     |
-|1  |10     |`C0`     |`F2`     |
+|1  |10     |`C0`     |`C0`     |`F2`     |`C0`     |
-|1  |11     |`C1`     |         |
+|1  |11     |`C1`     |`C1`     |         |`C1`     |
-|1  |12     |`C2`     |         |
+|1  |12     |`C2`     |`C2`     |         |`C2`     |
-|1  |13     |`C3`     |         |
+|1  |13     |`C3`     |`C3`     |         |`C3`     |
-|1  |14     |`C4`     |         |
+|1  |14     |`C4`     |`C4`     |         |`C4`     |
-|1  |15     |`C5`     |         |
+|1  |15     |`C5`     |`C5`     |         |`C5`     |
-|1  |16     |         |         |
+|1  |16     |         |         |         |         |
-|2  |1      |         |`A4`     |
+|2  |0      |         |`A0`¹    |         |`A0`²    |
-|2  |2      |         |`A5`     |
+|2  |1      |         |`A1`¹    |`A4`     |`A1`²    |
-|2  |3      |         |`A6`     |
+|2  |2      |         |`A2`¹    |`A5`     |`A2`²    |
-|2  |4      |         |`A7`     |
+|2  |3      |         |`A3`¹    |`A6`     |`A3`²    |
-|2  |5      |         |`C4`     |
+|2  |4      |         |`A4`¹    |`A7`     |`A4`²    |
-|2  |6      |         |`C0`     |
+|2  |5      |         |`A5`¹    |`C4`     |`A5`²    |
-|2  |7      |         |`C1`     |
+|2  |6      |         |`A6`¹    |`C0`     |`A6`²    |
-|2  |8      |         |`C2`     |
+|2  |7      |         |`A7`¹    |`C1`     |`A7`²    |
-|2  |9      |         |`C3`     |
+|2  |8      |         |`B0`¹    |`C2`     |`B0`²    |
-|2  |10     |         |`F2`     |
+|2  |9      |         |`B1`¹    |`C3`     |`B1`²    |
-|2  |11     |         |`C5`     |
+|2  |10     |         |`C0`¹    |`F2`     |`C0`²    |
-|2  |12     |         |`B2`     |
+|2  |11     |         |`C1`¹    |`C5`     |`C1`²    |
-|2  |13     |         |         |
+|2  |12     |         |`C2`¹    |`B2`     |`C2`²    |
-|2  |14     |         |         |
+|2  |13     |         |`C3`¹    |         |`C3`²    |
-|2  |15     |         |         |
+|2  |14     |         |`C4`¹    |         |`C4`²    |
-|2  |16     |         |         |
+|2  |15     |         |`C5`¹    |         |`C5`²    |
-|3  |1      |         |`B1`     |
+|2  |16     |         |         |         |         |
-|3  |2      |         |`E9`     |
+|3  |0      |         |`A0`¹    |         |`A0`²    |
-|3  |3      |         |`E13`    |
+|3  |1      |         |`A1`¹    |`B1`     |`A1`²    |
-|3  |4      |         |         |
+|3  |2      |         |`A2`¹    |`E9`     |`A2`²    |
-|3  |5      |         |         |
+|3  |3      |         |`A3`¹    |`E13`    |`A3`²    |
-|3  |6      |         |`E8`     |
+|3  |4      |         |`F6`¹    |         |`F6`²    |
-|3  |7      |         |`D10`    |
+|3  |5      |         |`F7`¹    |`B13`    |`F7`²    |
-|3  |8      |         |`D11`    |
+|3  |6      |         |`F8`¹    |`E8`     |`F8`²    |
-|3  |9      |         |`D12`    |
+|3  |7      |         |`F9`¹    |`D10`    |`F9`²    |
-|3  |10     |         |`D13`    |
+|3  |8      |         |`F10`¹   |`D11`    |`F10`²   |
-|3  |11     |         |`D14`    |
+|3  |9      |         |         |`D12`    |`F3`²    |
-|3  |12     |         |`B0`     |
+|3  |10     |         |`C0`¹    |`D13`    |`C0`²    |
-|3  |13     |         |`E7`     |
+|3  |11     |         |`C1`¹    |`D14`    |`C1`²    |
-|3  |14     |         |`E10`    |
+|3  |12     |         |`C2`¹    |`B0`     |`C2`²    |
-|3  |15     |         |`E11`    |
+|3  |13     |         |`C3`¹    |`E7`     |`C3`²    |
-|3  |16     |         |`E12`    |
+|3  |14     |         |         |`E10`    |`F4`²    |
-|4  |1      |         |`E14`    |
+|3  |15     |         |         |`E11`    |`F5`²    |
-|4  |2      |         |`B12`    |
+|3  |16     |         |         |`E12`    |         |
-|4  |3      |         |`B13`    |
+|4  |1      |         |         |`E14`    |         |
-|4  |4      |         |`B14`    |
+|4  |2      |         |         |`E15`    |         |
-|4  |5      |         |`B15`    |
+|4  |3      |         |         |`B12`    |         |
-|4  |6      |         |`E8`     |
+|4  |4      |         |         |`B14`    |         |
-|4  |7      |         |`D10`    |
+|4  |5      |         |         |`B15`    |         |
-|4  |8      |         |`D11`    |
+|4  |6      |         |         |`E8`     |         |
-|4  |9      |         |`D12`    |
+|4  |7      |         |         |`D10`    |         |
-|4  |10     |         |`D13`    |
+|4  |8      |         |         |`D11`    |         |
-|4  |11     |         |`D14`    |
+|4  |9      |         |         |`D12`    |         |
-|4  |12     |         |`D8`     |
+|4  |10     |         |         |`D13`    |         |
-|4  |13     |         |`D9`     |
+|4  |11     |         |         |`D14`    |         |
-|4  |14     |         |         |
+|4  |12     |         |         |`D8`     |         |
-|4  |15     |         |         |
+|4  |13     |         |         |`D9`     |         |
-|4  |16     |         |         |
+|4  |14     |         |         |         |         |
+|4  |15     |         |         |         |         |
+|4  |16     |         |         |         |         |
+<sup>¹ As of ChibiOS 20.3.4, the ADC driver for STM32F1xx devices supports only ADC1, therefore any configurations involving ADC2 or ADC3 cannot actually be used. In particular, pins `F6`…`F10`, which are present at least on some STM32F103x[C-G] devices, cannot be used as ADC inputs because of this driver limitation.</sup>
+<sup>² Not all STM32F4xx devices have ADC2 and/or ADC3, therefore some configurations shown in this table may be unavailable; in particular, pins `F4`…`F10` cannot be used as ADC inputs on devices which do not have ADC3. Check the device datasheet to confirm which pin functions are supported.</sup>
 ## Functions
@@ -141,10 +147,10 @@ Also note that the F0 and F3 use different numbering schemes. The F0 has a singl
 The ARM implementation of the ADC has a few additional options that you can override in your own keyboards and keymaps to change how it operates. Please consult the corresponding `hal_adc_lld.h` in ChibiOS for your specific microcontroller for further documentation on your available options.
-|`#define`            |Type  |Default              |Description                                                                                                                                                                                                 |
+|`#define`            |Type  |Default                                       |Description                                                                                                                                                                                                 |
-|---------------------|------|---------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+|---------------------|------|----------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-|`ADC_CIRCULAR_BUFFER`|`bool`|`false`              |If `true`, then the implementation will use a circular buffer.                                                                                                                                              |
+|`ADC_CIRCULAR_BUFFER`|`bool`|`false`                                       |If `true`, then the implementation will use a circular buffer.                                                                                                                                              |
-|`ADC_NUM_CHANNELS`   |`int` |`1`                  |Sets the number of channels that will be scanned as part of an ADC operation. The current implementation only supports `1`.                                                                                 |
+|`ADC_NUM_CHANNELS`   |`int` |`1`                                           |Sets the number of channels that will be scanned as part of an ADC operation. The current implementation only supports `1`.                                                                                 |
-|`ADC_BUFFER_DEPTH`   |`int` |`2`                  |Sets the depth of each result. Since we are only getting a 12-bit result by default, we set this to 2 bytes so we can contain our one value. This could be set to 1 if you opt for an 8-bit or lower result.|
+|`ADC_BUFFER_DEPTH`   |`int` |`2`                                           |Sets the depth of each result. Since we are only getting a 10-bit result by default, we set this to 2 bytes so we can contain our one value. This could be set to 1 if you opt for an 8-bit or lower result.|
-|`ADC_SAMPLING_RATE`  |`int` |`ADC_SMPR_SMP_1P5`   |Sets the sampling rate of the ADC. By default, it is set to the fastest setting.                                                                                                                            |
+|`ADC_SAMPLING_RATE`  |`int` |`ADC_SMPR_SMP_1P5`                            |Sets the sampling rate of the ADC. By default, it is set to the fastest setting.                                                                                                                            |
-|`ADC_RESOLUTION`     |`int` |`ADC_CFGR1_RES_12BIT`|The resolution of your result. We choose 12 bit by default, but you can opt for 12, 10, 8, or 6 bit.                                                                                                        |
+|`ADC_RESOLUTION`     |`int` |`ADC_CFGR1_RES_10BIT` or `ADC_CFGR_RES_10BITS`|The resolution of your result. We choose 10 bit by default, but you can opt for 12, 10, 8, or 6 bit. Different MCUs use slightly different names for the resolution constants.                              |
diff --git a/docs/cli_commands.md b/docs/cli_commands.md
index 05e930607..581342093 100644
--- a/docs/cli_commands.md
+++ b/docs/cli_commands.md
@@ -107,6 +107,54 @@ This command lets you configure the behavior of QMK. For the full `qmk config` d
 qmk config [-ro] [config_token1] [config_token2] [...] [config_tokenN]
 ```
+## `qmk console`
+This command lets you connect to keyboard consoles to get debugging messages. It only works if your keyboard firmware has been compiled with `CONSOLE_ENABLED=yes`.
+**Usage**:
+```
+qmk console [-d <pid>:<vid>[:<index>]] [-l] [-n] [-t] [-w <seconds>]
+```
+**Examples**:
+Connect to all available keyboards and show their console messages:
+```
+qmk console
+```
+List all devices:
+```
+qmk console -l
+```
+Show only messages from clueboard/66/rev3 keyboards:
+```
+qmk console -d C1ED:2370
+```
+Show only messages from the second clueboard/66/rev3:
+```
+qmk console -d C1ED:2370:2
+```
+Show timestamps and VID:PID instead of names:
+```
+qmk console -n -t
+```
+Disable bootloader messages:
+```
+qmk console --no-bootloaders
+```
 ## `qmk doctor`
 This command examines your environment and alerts you to potential build or flash problems. It can fix many of them if you want it to.
diff --git a/docs/compatible_microcontrollers.md b/docs/compatible_microcontrollers.md
index 47a4844e7..0f5b140de 100644
--- a/docs/compatible_microcontrollers.md
+++ b/docs/compatible_microcontrollers.md
@@ -28,8 +28,11 @@ You can also use any ARM chip with USB that [ChibiOS](https://www.chibios.org) s
 * [STM32F303](https://www.st.com/en/microcontrollers-microprocessors/stm32f303.html)
 * [STM32F401](https://www.st.com/en/microcontrollers-microprocessors/stm32f401.html)
 * [STM32F411](https://www.st.com/en/microcontrollers-microprocessors/stm32f411.html)
+ * [STM32F446](https://www.st.com/en/microcontrollers-microprocessors/stm32f446.html)
 * [STM32G431](https://www.st.com/en/microcontrollers-microprocessors/stm32g4x1.html)
 * [STM32G474](https://www.st.com/en/microcontrollers-microprocessors/stm32g4x4.html)
+ * [STM32L433](https://www.st.com/en/microcontrollers-microprocessors/stm32l4x3.html)
+ * [STM32L443](https://www.st.com/en/microcontrollers-microprocessors/stm32l4x3.html)
 ### NXP (Kinetis)
diff --git a/docs/feature_auto_shift.md b/docs/feature_auto_shift.md
index 8e04d9dd3..ec7eeaaa0 100644
--- a/docs/feature_auto_shift.md
+++ b/docs/feature_auto_shift.md
@@ -109,6 +109,33 @@ Do not Auto Shift numeric keys, zero through nine.
 Do not Auto Shift alpha characters, which include A through Z.
+### Auto Shift Per Key 
+This is a function that allows you to determine which keys shold be autoshifted, much like the tap-hold keys. 
+The default function looks like this: 
+```c
+bool get_auto_shifted_key(uint16_t keycode, keyrecord_t *record) {
+    switch (keycode) {
+#    ifndef NO_AUTO_SHIFT_ALPHA
+        case KC_A ... KC_Z:
+#    endif
+#    ifndef NO_AUTO_SHIFT_NUMERIC
+        case KC_1 ... KC_0:
+#    endif
+#    ifndef NO_AUTO_SHIFT_SPECIAL
+        case KC_TAB:
+        case KC_MINUS ... KC_SLASH:
+        case KC_NONUS_BSLASH:
+#    endif
+            return true;
+    }
+    return false;
+}
+```
+This functionality is enabled by default, and does not need a define.
 ### AUTO_SHIFT_REPEAT (simple define)
 Enables keyrepeat.
diff --git a/docs/feature_leader_key.md b/docs/feature_leader_key.md
index 41ff8f1a4..f10bca758 100644
--- a/docs/feature_leader_key.md
+++ b/docs/feature_leader_key.md
@@ -72,6 +72,19 @@ SEQ_THREE_KEYS(KC_C, KC_C, KC_C) {
 }
 ```
+## Infinite Leader key timeout
+Sometimes your leader key is not on a comfortable places as the rest of keys on your sequence. Imagine that your leader key is one of your outer top right keys, you may need to reposition your hand just to reach your leader key.
+This can make typing the entire sequence on time hard even if you are able to type most of the sequence fast. For example, if your sequence is `Leader + asd` typing `asd` fast is very easy once you have your hands in your home row. However starting the sequence in time after moving your hand out of the home row to reach the leader key and back is not.
+To remove the stress this situation produces to your hands you can enable an infinite timeout just for the leader key. This mean that, after you hit the leader key you will have an infinite amount of time to start the rest of the sequence, allowing you to proper position your hands on the best position to type the rest of the sequence comfortably.
+This infinite timeout only affects the leader key, so in our previous example of `Leader + asd` you will have an infinite amount of time between `Leader` and `a`, but once you start the sequence the timeout you have configured (global or per key) will work normally.
+This way you can configure a very short `LEADER_TIMEOUT` but still have plenty of time to position your hands.
+In order to enable this, place this in your `config.h`:
+```c
+#define LEADER_NO_TIMEOUT
+```
 ## Strict Key Processing
 By default, the Leader Key feature will filter the keycode out of [`Mod-Tap`](mod_tap.md) and [`Layer Tap`](feature_layers.md#switching-and-toggling-layers) functions when checking for the Leader sequences. That means if you're using `LT(3, KC_A)`, it will pick this up as `KC_A` for the sequence, rather than `LT(3, KC_A)`, giving a more expected behavior for newer users.
diff --git a/docs/feature_led_matrix.md b/docs/feature_led_matrix.md
index f4a661634..e56caabfe 100644
--- a/docs/feature_led_matrix.md
+++ b/docs/feature_led_matrix.md
@@ -1,14 +1,14 @@
-# LED Matrix Lighting
+# LED Matrix Lighting :id=led-matrix-lighting
 This feature allows you to use LED matrices driven by external drivers. It hooks into the backlight system so you can use the same keycodes as backlighting to control it.
 If you want to use RGB LED's you should use the [RGB Matrix Subsystem](feature_rgb_matrix.md) instead.
-## Driver configuration
+## Driver configuration :id=driver-configuration
+---
+### IS31FL3731 :id=is31fl3731
-### IS31FL3731
+There is basic support for addressable LED matrix lighting with the I2C IS31FL3731 LED controller. To enable it, add this to your `rules.mk`:
-There is basic support for addressable LED matrix lighting with the I2C IS31FL3731 RGB controller. To enable it, add this to your `rules.mk`:
 ```make
 LED_MATRIX_ENABLE = yes
@@ -19,7 +19,7 @@ You can use between 1 and 4 IS31FL3731 IC's. Do not specify `LED_DRIVER_ADDR_<N>
 | Variable | Description | Default |
 |----------|-------------|---------|
-| `ISSI_TIMEOUT` | (Optional) How long to wait for i2c messages | 100 |
+| `ISSI_TIMEOUT` | (Optional) How long to wait for i2c messages, in milliseconds | 100 |
 | `ISSI_PERSISTENCE` | (Optional) Retry failed messages this many times | 0 |
 | `LED_DRIVER_COUNT` | (Required) How many LED driver IC's are present | |
 | `DRIVER_LED_TOTAL` | (Required) How many LED lights are present across all drivers | |
@@ -42,59 +42,336 @@ Here is an example using 2 drivers.
 #define LED_DRIVER_ADDR_2 0b1110110
 #define LED_DRIVER_COUNT 2
-#define LED_DRIVER_1_LED_COUNT 25
+#define LED_DRIVER_1_LED_TOTAL 25
-#define LED_DRIVER_2_LED_COUNT 24
+#define LED_DRIVER_2_LED_TOTAL 24
-#define DRIVER_LED_TOTAL LED_DRIVER_1_LED_TOTAL + LED_DRIVER_2_LED_TOTAL
+#define DRIVER_LED_TOTAL (LED_DRIVER_1_LED_TOTAL + LED_DRIVER_2_LED_TOTAL)
 ```
-Currently only 2 drivers are supported, but it would be trivial to support all 4 combinations.
+!> Note the parentheses, this is so when `LED_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() % (LED_DRIVER_1_LED_TOTAL + LED_DRIVER_2_LED_TOTAL)` will give very different results than `rand() % LED_DRIVER_1_LED_TOTAL + LED_DRIVER_2_LED_TOTAL`.
 Define these arrays listing all the LEDs in your `<keyboard>.c`:
 ```c
-    const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
+const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
-    /* Refer to IS31 manual for these locations
+/* Refer to IS31 manual for these locations
-     *    driver
+ *    driver
-     *    |  LED address
+ *    |  LED address
-     *    |  | */
+ *    |  | */
-        { 0, C1_1  },
+    { 0, C1_1  },
-        { 0, C1_15 },
+    { 0, C1_15 },
-       // ...
+    // ...
-    }
+}
 ```
 Where `Cx_y` is the location of the LED in the matrix defined by [the datasheet](https://www.issi.com/WW/pdf/31FL3731.pdf) and the header file `drivers/issi/is31fl3731-simple.h`. The `driver` is the index of the driver you defined in your `config.h` (`0`, `1`, `2`, or `3` ).
-## Keycodes
+---
+From this point forward the configuration is the same for all the drivers. The `led_config_t` struct provides a key electrical matrix to led index lookup table, what the physical position of each LED is on the board, and what type of key or usage the LED if the LED represents. Here is a brief example:
+```c
+led_config_t g_led_config = { {
+  // Key Matrix to LED Index
+  {   5, NO_LED, NO_LED,   0 },
+  { NO_LED, NO_LED, NO_LED, NO_LED },
+  {   4, NO_LED, NO_LED,   1 },
+  {   3, NO_LED, NO_LED,   2 }
+}, {
+  // LED Index to Physical Position
+  { 188,  16 }, { 187,  48 }, { 149,  64 }, { 112,  64 }, {  37,  48 }, {  38,  16 }
+}, {
+  // LED Index to Flag
+  1, 4, 4, 4, 4, 1
+} };
+```
+The first part, `// Key Matrix to LED Index`, tells the system what key this LED represents by using the key's electrical matrix row & col. The second part, `// LED Index to Physical Position` represents the LED's physical `{ x, y }` position on the keyboard. The default expected range of values for `{ x, y }` is the inclusive range `{ 0..224, 0..64 }`. This default expected range is due to effects that calculate the center of the keyboard for their animations. The easiest way to calculate these positions is imagine your keyboard is a grid, and the top left of the keyboard represents `{ x, y }` coordinate `{ 0, 0 }` and the bottom right of your keyboard represents `{ 224, 64 }`. Using this as a basis, you can use the following formula to calculate the physical position:
+```c
+x = 224 / (NUMBER_OF_COLS - 1) * COL_POSITION
+y =  64 / (NUMBER_OF_ROWS - 1) * ROW_POSITION
+```
+Where NUMBER_OF_COLS, NUMBER_OF_ROWS, COL_POSITION, & ROW_POSITION are all based on the physical layout of your keyboard, not the electrical layout. 
+As mentioned earlier, the center of the keyboard by default is expected to be `{ 112, 32 }`, but this can be changed if you want to more accurately calculate the LED's physical `{ x, y }` positions. Keyboard designers can implement `#define LED_MATRIX_CENTER { 112, 32 }` in their config.h file with the new center point of the keyboard, or where they want it to be allowing more possibilities for the `{ x, y }` values. Do note that the maximum value for x or y is 255, and the recommended maximum is 224 as this gives animations runoff room before they reset.
+`// LED Index to Flag` is a bitmask, whether or not a certain LEDs is of a certain type. It is recommended that LEDs are set to only 1 type.
+## Flags :id=flags
+|Define                      |Value |Description                                      |
+|----------------------------|------|-------------------------------------------------|
+|`HAS_FLAGS(bits, flags)`    |*n/a* |Evaluates to `true` if `bits` has all `flags` set|
+|`HAS_ANY_FLAGS(bits, flags)`|*n/a* |Evaluates to `true` if `bits` has any `flags` set|
+|`LED_FLAG_NONE`             |`0x00`|If this LED has no flags                         |
+|`LED_FLAG_ALL`              |`0xFF`|If this LED has all flags                        |
+|`LED_FLAG_MODIFIER`         |`0x01`|If the LED is on a modifier key                  |
+|`LED_FLAG_KEYLIGHT`         |`0x04`|If the LED is for key backlight                  |
+|`LED_FLAG_INDICATOR`        |`0x08`|If the LED is for keyboard state indication      |
+## Keycodes :id=keycodes
+All LED matrix keycodes are currently shared with the [Backlight feature](feature_backlight.md).
+|Key      |Description                  |
+|---------|-----------------------------|
+|`BL_TOGG`|Toggle LED Matrix on or off  |
+|`BL_STEP`|Cycle through modes          |
+|`BL_ON`  |Turn on LED Matrix           |
+|`BL_OFF` |Turn off LED Matrix          |
+|`BL_INC` |Increase the brightness level|
+|`BL_DEC` |Decrease the brightness level|
+## LED Matrix Effects :id=led-matrix-effects
+These are the effects that are currently available:
+```c
+enum led_matrix_effects {
+    LED_MATRIX_NONE = 0,
+    LED_MATRIX_SOLID = 1,           // Static single val, no speed support
+    LED_MATRIX_ALPHAS_MODS,         // Static dual val, speed is val for LEDs marked as modifiers
+    LED_MATRIX_BREATHING,           // Cycling brightness animation
+    LED_MATRIX_BAND,                // Band fading brightness scrolling left to right
+    LED_MATRIX_BAND_PINWHEEL,       // 3 blade spinning pinwheel fades brightness
+    LED_MATRIX_BAND_SPIRAL,         // Spinning spiral fades brightness
+    LED_MATRIX_CYCLE_LEFT_RIGHT,    // Full gradient scrolling left to right
+    LED_MATRIX_CYCLE_UP_DOWN,       // Full gradient scrolling top to bottom
+    LED_MATRIX_CYCLE_OUT_IN,        // Full gradient scrolling out to in
+    LED_MATRIX_DUAL_BEACON,         // Full gradient spinning around center of keyboard
+#if defined(LED_MATRIX_KEYPRESSES) || defined(LED_MATRIX_KEYRELEASES)
+    LED_MATRIX_SOLID_REACTIVE_SIMPLE,   // Pulses keys hit then fades out
+    LED_MATRIX_SOLID_REACTIVE_WIDE       // Value pulses near a single key hit then fades out
+    LED_MATRIX_SOLID_REACTIVE_MULTIWIDE  // Value pulses near multiple key hits then fades out
+    LED_MATRIX_SOLID_REACTIVE_CROSS      // Value pulses the same column and row of a single key hit then fades out
+    LED_MATRIX_SOLID_REACTIVE_MULTICROSS // Value pulses the same column and row of multiple key hits then fades out
+    LED_MATRIX_SOLID_REACTIVE_NEXUS      // Value pulses away on the same column and row of a single key hit then fades out
+    LED_MATRIX_SOLID_REACTIVE_MULTINEXUS // Value pulses away on the same column and row of multiple key hits then fades out
+    LED_MATRIX_SOLID_SPLASH,             // Value pulses away from a single key hit then fades out
+    LED_MATRIX_SOLID_MULTISPLASH,        // Value pulses away from multiple key hits then fades out
+#endif
+    LED_MATRIX_WAVE_LEFT_RIGHT           // Sine wave scrolling from left to right
+    LED_MATRIX_WAVE_UP_DOWN              // Sine wave scrolling from up to down
+    LED_MATRIX_EFFECT_MAX
+};
+```
+You can disable a single effect by defining `DISABLE_[EFFECT_NAME]` in your `config.h`:
+|Define                                                 |Description                                    |
+|-------------------------------------------------------|-----------------------------------------------|
+|`#define DISABLE_LED_MATRIX_SOLID`                     |Disables `LED_MATRIX_SOLID`                    |
+|`#define DISABLE_LED_MATRIX_ALPHAS_MODS`               |Disables `LED_MATRIX_ALPHAS_MODS`              |
+|`#define DISABLE_LED_MATRIX_BREATHING`                 |Disables `LED_MATRIX_BREATHING`                |
+|`#define DISABLE_LED_MATRIX_BAND`                      |Disables `LED_MATRIX_BAND`                     |
+|`#define DISABLE_LED_MATRIX_BAND_PINWHEEL`             |Disables `LED_MATRIX_BAND_PINWHEEL`            |
+|`#define DISABLE_LED_MATRIX_BAND_SPIRAL`               |Disables `LED_MATRIX_BAND_SPIRAL`              |
+|`#define DISABLE_LED_MATRIX_CYCLE_LEFT_RIGHT`          |Disables `LED_MATRIX_CYCLE_LEFT_RIGHT`         |
+|`#define DISABLE_LED_MATRIX_CYCLE_UP_DOWN`             |Disables `LED_MATRIX_CYCLE_UP_DOWN`            |
+|`#define DISABLE_LED_MATRIX_CYCLE_OUT_IN`              |Disables `LED_MATRIX_CYCLE_OUT_IN`             |
+|`#define DISABLE_LED_MATRIX_DUAL_BEACON`               |Disables `LED_MATRIX_DUAL_BEACON`              |
+|`#define DISABLE_LED_MATRIX_SOLID_REACTIVE_SIMPLE`     |Disables `LED_MATRIX_SOLID_REACTIVE_SIMPLE`    |
+|`#define DISABLE_LED_MATRIX_SOLID_REACTIVE_WIDE`       |Disables `LED_MATRIX_SOLID_REACTIVE_WIDE`      |
+|`#define DISABLE_LED_MATRIX_SOLID_REACTIVE_MULTIWIDE`  |Disables `LED_MATRIX_SOLID_REACTIVE_MULTIWIDE` |
+|`#define DISABLE_LED_MATRIX_SOLID_REACTIVE_CROSS`      |Disables `LED_MATRIX_SOLID_REACTIVE_CROSS`     |
+|`#define DISABLE_LED_MATRIX_SOLID_REACTIVE_MULTICROSS` |Disables `LED_MATRIX_SOLID_REACTIVE_MULTICROSS`|
+|`#define DISABLE_LED_MATRIX_SOLID_REACTIVE_NEXUS`      |Disables `LED_MATRIX_SOLID_REACTIVE_NEXUS`     |
+|`#define DISABLE_LED_MATRIX_SOLID_REACTIVE_MULTINEXUS` |Disables `LED_MATRIX_SOLID_REACTIVE_MULTINEXUS`|
+|`#define DISABLE_LED_MATRIX_SOLID_SPLASH`              |Disables `LED_MATRIX_SOLID_SPLASH`             |
+|`#define DISABLE_LED_MATRIX_SOLID_MULTISPLASH`         |Disables `LED_MATRIX_SOLID_MULTISPLASH`        |
+|`#define DISABLE_LED_MATRIX_WAVE_LEFT_RIGHT`           |Disables `LED_MATRIX_WAVE_LEFT_RIGHT`          |
+|`#define DISABLE_LED_MATRIX_WAVE_UP_DOWN`              |Disables `LED_MATRIX_WAVE_UP_DOWN`             |
+## Custom LED Matrix Effects :id=custom-led-matrix-effects
+By setting `LED_MATRIX_CUSTOM_USER` (and/or `LED_MATRIX_CUSTOM_KB`) in `rules.mk`, new effects can be defined directly from userspace, without having to edit any QMK core files.
+To declare new effects, create a new `led_matrix_user/kb.inc` that looks something like this:
+`led_matrix_user.inc` should go in the root of the keymap directory.
+`led_matrix_kb.inc` should go in the root of the keyboard directory.
+To use custom effects in your code, simply prepend `LED_MATRIX_CUSTOM_` to the effect name specified in `LED_MATRIX_EFFECT()`. For example, an effect declared as `LED_MATRIX_EFFECT(my_cool_effect)` would be referenced with:
+```c
+led_matrix_mode(led_MATRIX_CUSTOM_my_cool_effect);
+```
+```c
+// !!! DO NOT ADD #pragma once !!! //
+// Step 1.
+// Declare custom effects using the LED_MATRIX_EFFECT macro
+// (note the lack of semicolon after the macro!)
+LED_MATRIX_EFFECT(my_cool_effect)
+LED_MATRIX_EFFECT(my_cool_effect2)
+// Step 2.
+// Define effects inside the `LED_MATRIX_CUSTOM_EFFECT_IMPLS` ifdef block
+#ifdef LED_MATRIX_CUSTOM_EFFECT_IMPLS
+// e.g: A simple effect, self-contained within a single method
+static bool my_cool_effect(effect_params_t* params) {
+  LED_MATRIX_USE_LIMITS(led_min, led_max);
+  for (uint8_t i = led_min; i < led_max; i++) {
+    led_matrix_set_value(i, 0xFF);
+  }
+  return led_max < DRIVER_LED_TOTAL;
+}
+// e.g: A more complex effect, relying on external methods and state, with
+// dedicated init and run methods
+static uint8_t some_global_state;
+static void my_cool_effect2_complex_init(effect_params_t* params) {
+  some_global_state = 1;
+}
+static bool my_cool_effect2_complex_run(effect_params_t* params) {
+  LED_MATRIX_USE_LIMITS(led_min, led_max);
+  for (uint8_t i = led_min; i < led_max; i++) {
+    led_matrix_set_value(i, some_global_state++);
+  }
+  return led_max < DRIVER_LED_TOTAL;
+}
+static bool my_cool_effect2(effect_params_t* params) {
+  if (params->init) my_cool_effect2_complex_init(params);
+  return my_cool_effect2_complex_run(params);
+}
+#endif // LED_MATRIX_CUSTOM_EFFECT_IMPLS
+```
+For inspiration and examples, check out the built-in effects under `quantum/led_matrix_animations/`
+## Additional `config.h` Options :id=additional-configh-options
+```c
+#define LED_MATRIX_KEYPRESSES // reacts to keypresses
+#define LED_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
+#define LED_DISABLE_TIMEOUT 0 // number of milliseconds to wait until led automatically turns off
+#define LED_DISABLE_AFTER_TIMEOUT 0 // OBSOLETE: number of ticks to wait until disabling effects
+#define LED_DISABLE_WHEN_USB_SUSPENDED false // turn off effects when suspended
+#define LED_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 LED_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 LED_MATRIX_MAXIMUM_BRIGHTNESS 255 // limits maximum brightness of LEDs
+#define LED_MATRIX_STARTUP_MODE LED_MATRIX_SOLID // Sets the default mode, if none has been set
+#define LED_MATRIX_STARTUP_VAL LED_MATRIX_MAXIMUM_BRIGHTNESS // Sets the default brightness value, if none has been set
+#define LED_MATRIX_STARTUP_SPD 127 // Sets the default animation speed, if none has been set
+#define LED_MATRIX_SPLIT { X, Y }   // (Optional) For split keyboards, the number of LEDs connected on each half. X = left, Y = Right.
+                                    // If LED_MATRIX_KEYPRESSES or LED_MATRIX_KEYRELEASES is enabled, you also will want to enable SPLIT_TRANSPORT_MIRROR
+```
+## EEPROM storage :id=eeprom-storage
+The EEPROM for it is currently shared with the RGB Matrix system (it's generally assumed only one feature would be used at a time), but could be configured to use its own 32bit address with:
+```c
+#define EECONFIG_LED_MATRIX (uint32_t *)28
+```
+Where `28` is an unused index from `eeconfig.h`.
+### Direct Operation :id=direct-operation
+|Function                                    |Description  |
+|--------------------------------------------|-------------|
+|`led_matrix_set_value_all(v)`         |Set all of the LEDs to the given value, where `v` is between 0 and 255 (not written to EEPROM) |
+|`led_matrix_set_value(index, v)`      |Set a single LED to the given value, where `v` is between 0 and 255, and `index` is between 0 and `DRIVER_LED_TOTAL` (not written to EEPROM) |
+### Disable/Enable Effects :id=disable-enable-effects
+|Function                                    |Description  |
+|--------------------------------------------|-------------|
+|`led_matrix_toggle()`                       |Toggle effect range LEDs between on and off |
+|`led_matrix_toggle_noeeprom()`              |Toggle effect range LEDs between on and off (not written to EEPROM) |
+|`led_matrix_enable()`                       |Turn effect range LEDs on, based on their previous state |
+|`led_matrix_enable_noeeprom()`              |Turn effect range LEDs on, based on their previous state (not written to EEPROM) |
+|`led_matrix_disable()`                      |Turn effect range LEDs off, based on their previous state |
+|`led_matrix_disable_noeeprom()`             |Turn effect range LEDs off, based on their previous state (not written to EEPROM) |
-All LED matrix keycodes are currently shared with the [backlight system](feature_backlight.md).
+### Change Effect Mode :id=change-effect-mode
+|Function                                    |Description  |
+|--------------------------------------------|-------------|
+|`led_matrix_mode(mode)`                     |Set the mode, if LED animations are enabled |
+|`led_matrix_mode_noeeprom(mode)`            |Set the mode, if LED animations are enabled (not written to EEPROM) |
+|`led_matrix_step()`                         |Change the mode to the next LED animation in the list of enabled LED animations |
+|`led_matrix_step_noeeprom()`                |Change the mode to the next LED animation in the list of enabled LED animations (not written to EEPROM) |
+|`led_matrix_step_reverse()`                 |Change the mode to the previous LED animation in the list of enabled LED animations |
+|`led_matrix_step_reverse_noeeprom()`        |Change the mode to the previous LED animation in the list of enabled LED animations (not written to EEPROM) |
+|`led_matrix_increase_speed()`               |Increase the speed of the animations |
+|`led_matrix_increase_speed_noeeprom()`      |Increase the speed of the animations (not written to EEPROM) |
+|`led_matrix_decrease_speed()`               |Decrease the speed of the animations |
+|`led_matrix_decrease_speed_noeeprom()`      |Decrease the speed of the animations (not written to EEPROM) |
+|`led_matrix_set_speed(speed)`               |Set the speed of the animations to the given value where `speed` is between 0 and 255 |
+|`led_matrix_set_speed_noeeprom(speed)`      |Set the speed of the animations to the given value where `speed` is between 0 and 255 (not written to EEPROM) |
-## LED Matrix Effects
+### Change Value :id=change-value
+|Function                                    |Description  |
+|--------------------------------------------|-------------|
+|`led_matrix_increase_val()`                 |Increase the value for effect range LEDs. This wraps around at maximum value |
+|`led_matrix_increase_val_noeeprom()`        |Increase the value for effect range LEDs. This wraps around at maximum value (not written to EEPROM) |
+|`led_matrix_decrease_val()`                 |Decrease the value for effect range LEDs. This wraps around at minimum value |
+|`led_matrix_decrease_val_noeeprom()`        |Decrease the value for effect range LEDs. This wraps around at minimum value (not written to EEPROM) |
-Currently no LED matrix effects have been created.
+### Query Current Status :id=query-current-status
+|Function                         |Description                |
+|---------------------------------|---------------------------|
+|`led_matrix_is_enabled()`        |Gets current on/off status |
+|`led_matrix_get_mode()`          |Gets current mode          |
+|`led_matrix_get_val()`           |Gets current val           |
+|`led_matrix_get_speed()`         |Gets current speed         |
+|`led_matrix_get_suspend_state()` |Gets current suspend state |
-## Custom Layer Effects
+## Callbacks :id=callbacks
-Custom layer effects can be done by defining this in your `<keyboard>.c`:
+### Indicators :id=indicators
+If you want to set custom indicators, such as an LED for Caps Lock, or layer indication, you can use the `led_matrix_indicators_kb` or `led_matrix_indicators_user` function for that: 
 ```c
 void led_matrix_indicators_kb(void) {
-    led_matrix_set_index_value(index, value);
+    led_matrix_set_color(index, value);
 }
 ```
-A similar function works in the keymap as `led_matrix_indicators_user`.
+In addition, there are the advanced indicator functions.  These are aimed at those with heavily customized displays, where rendering every LED per cycle is expensive.  This includes a special macro to help make this easier to use: `LED_MATRIX_INDICATOR_SET_VALUE(i, v)`.
+```c
+void led_matrix_indicators_advanced_user(uint8_t led_min, uint8_t led_max) {
+    LED_MATRIX_INDICATOR_SET_VALUE(index, value);
+}
+```
-## Suspended State
+## Suspended State :id=suspended-state
+To use the suspend feature, make sure that `#define LED_DISABLE_WHEN_USB_SUSPENDED true` is added to the `config.h` file. 
-To use the suspend feature, add this to your `<keyboard>.c`:
+Additionally add this to your `<keyboard>.c`:
 ```c
 void suspend_power_down_kb(void) {
    led_matrix_set_suspend_state(true);
+    suspend_power_down_user();
 }
 void suspend_wakeup_init_kb(void) {
    led_matrix_set_suspend_state(false);
+    suspend_wakeup_init_user();
+}
+```
+or add this to your `keymap.c`:
+```c
+void suspend_power_down_user(void) {
+    led_matrix_set_suspend_state(true);
+}
+void suspend_wakeup_init_user(void) {
+    led_matrix_set_suspend_state(false);
 }
-```
-\ No newline at end of file
+```
diff --git a/docs/feature_oled_driver.md b/docs/feature_oled_driver.md
index 44202487f..d2dc6103a 100644
--- a/docs/feature_oled_driver.md
+++ b/docs/feature_oled_driver.md
@@ -145,6 +145,8 @@ void oled_task_user(void) {
 |`OLED_FONT_WIDTH`          |`6`              |The font width                                                                                                            |
 |`OLED_FONT_HEIGHT`         |`8`              |The font height (untested)                                                                                                |
 |`OLED_TIMEOUT`             |`60000`          |Turns off the OLED screen after 60000ms of keyboard inactivity. Helps reduce OLED Burn-in. Set to 0 to disable.           |
+|`OLED_FADE_OUT`            |*Not defined*    |Enables fade out animation. Use together with `OLED_TIMEOUT`.                                                             |
+|`OLED_FADE_OUT_INTERVAL`   |`0`              |The speed of fade out animation, from 0 to 15. Larger values are slower.                                                  |
 |`OLED_SCROLL_TIMEOUT`      |`0`              |Scrolls the OLED screen after 0ms of OLED inactivity. Helps reduce OLED Burn-in. Set to 0 to disable.                     |
 |`OLED_SCROLL_TIMEOUT_RIGHT`|*Not defined*    |Scroll timeout direction is right when defined, left when undefined.                                                      |
 |`OLED_IC`                  |`OLED_IC_SSD1306`|Set to `OLED_IC_SH1106` if you're using the SH1106 OLED controller.                                                       |
diff --git a/docs/feature_rgb_matrix.md b/docs/feature_rgb_matrix.md
index e996caddd..a29d5c624 100644
--- a/docs/feature_rgb_matrix.md
+++ b/docs/feature_rgb_matrix.md
@@ -15,7 +15,20 @@ RGB_MATRIX_ENABLE = yes
 RGB_MATRIX_DRIVER = IS31FL3731
 ```
-Configure the hardware via your `config.h`:
+You can use between 1 and 4 IS31FL3731 IC's. Do not specify `DRIVER_ADDR_<N>` defines for IC's that are not present on your keyboard. You can define the following items in `config.h`:
+| Variable | Description | Default |
+|----------|-------------|---------|
+| `ISSI_TIMEOUT` | (Optional) How long to wait for i2c messages, in milliseconds | 100 |
+| `ISSI_PERSISTENCE` | (Optional) Retry failed messages this many times | 0 |
+| `DRIVER_COUNT` | (Required) How many RGB driver IC's are present | |
+| `DRIVER_LED_TOTAL` | (Required) How many RGB lights are present across all drivers | |
+| `DRIVER_ADDR_1` | (Required) Address for the first RGB driver | |
+| `DRIVER_ADDR_2` | (Optional) Address for the second RGB driver | |
+| `DRIVER_ADDR_3` | (Optional) Address for the third RGB driver | |
+| `DRIVER_ADDR_4` | (Optional) Address for the fourth RGB driver | |
+Here is an example using 2 drivers.
 ```c
 // This is a 7-bit address, that gets left-shifted and bit 0
@@ -36,8 +49,6 @@ Configure the hardware via your `config.h`:
 !> 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`.
-Currently only 2 drivers are supported, but it would be trivial to support all 4 combinations.
 Define these arrays listing all the LEDs in your `<keyboard>.c`:
 ```c
@@ -53,12 +64,10 @@ const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
 }
 ```
-Where `Cx_y` is the location of the LED in the matrix defined by [the datasheet](https://www.issi.com/WW/pdf/31FL3731.pdf) and the header file `drivers/issi/is31fl3731.h`. The `driver` is the index of the driver you defined in your `config.h` (`0` or `1` right now).
+Where `Cx_y` is the location of the LED in the matrix defined by [the datasheet](https://www.issi.com/WW/pdf/31FL3731.pdf) and the header file `drivers/issi/is31fl3731.h`. The `driver` is the index of the driver you defined in your `config.h` (`0`, `1`, `2`, or `3`).
 ---
-### IS31FL3733/IS31FL3737 :id=is31fl3733is31fl3737
+### IS31FL3733 :id=is31fl3733
-!> For the IS31FL3737, replace all instances of `IS31FL3733` below with `IS31FL3737`.
 There is basic support for addressable RGB matrix lighting with the I2C IS31FL3733 RGB controller. To enable it, add this to your `rules.mk`:
@@ -67,7 +76,24 @@ RGB_MATRIX_ENABLE = yes
 RGB_MATRIX_DRIVER = IS31FL3733
 ```
-Configure the hardware via your `config.h`:
+You can use between 1 and 4 IS31FL3733 IC's. Do not specify `DRIVER_ADDR_<N>` defines for IC's that are not present on your keyboard. You can define the following items in `config.h`:
+| Variable | Description | Default |
+|----------|-------------|---------|
+| `ISSI_TIMEOUT` | (Optional) How long to wait for i2c messages, in milliseconds | 100 |
+| `ISSI_PERSISTENCE` | (Optional) Retry failed messages this many times | 0 |
+| `DRIVER_COUNT` | (Required) How many RGB driver IC's are present | |
+| `DRIVER_LED_TOTAL` | (Required) How many RGB lights are present across all drivers | |
+| `DRIVER_ADDR_1` | (Required) Address for the first RGB driver | |
+| `DRIVER_ADDR_2` | (Optional) Address for the second RGB driver | |
+| `DRIVER_ADDR_3` | (Optional) Address for the third RGB driver | |
+| `DRIVER_ADDR_4` | (Optional) Address for the fourth RGB driver | |
+| `DRIVER_SYNC_1` | (Optional) Sync configuration for the first RGB driver | 0 |
+| `DRIVER_SYNC_2` | (Optional) Sync configuration for the second RGB driver | 0 |
+| `DRIVER_SYNC_3` | (Optional) Sync configuration for the third RGB driver | 0 |
+| `DRIVER_SYNC_4` | (Optional) Sync configuration for the fourth RGB driver | 0 |
+Here is an example using 2 drivers.
 ```c
 // This is a 7-bit address, that gets left-shifted and bit 0
@@ -81,6 +107,58 @@ Configure the hardware via your `config.h`:
 // ADDR2 represents A3:A2 of the 7-bit address.
 // The result is: 0b101(ADDR2)(ADDR1)
 #define DRIVER_ADDR_1 0b1010000
+#define DRIVER_ADDR_2 0b1010011
+#define DRIVER_COUNT 2
+#define DRIVER_1_LED_TOTAL 58
+#define DRIVER_2_LED_TOTAL 10
+#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`.
+Currently only 4 drivers are supported, but it would be trivial to support all 8 combinations.
+Define these arrays listing all the LEDs in your `<keyboard>.c`:
+```c
+const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
+/* Refer to IS31 manual for these locations
+ *   driver
+ *   |  R location
+ *   |  |       G location
+ *   |  |       |       B location
+ *   |  |       |       | */
+    {0, B_1,    A_1,    C_1},
+    ....
+}
+```
+Where `X_Y` is the location of the LED in the matrix defined by [the datasheet](https://www.issi.com/WW/pdf/31FL3733.pdf) and the header file `drivers/issi/is31fl3733.h`. The `driver` is the index of the driver you defined in your `config.h` (`0`, `1`, `2`, or `3` for now).
+---
+### IS31FL3737 :id=is31fl3737
+There is basic support for addressable RGB matrix lighting with the I2C IS31FL3737 RGB controller. To enable it, add this to your `rules.mk`:
+```makefile
+RGB_MATRIX_ENABLE = yes
+RGB_MATRIX_DRIVER = IS31FL3737
+```
+Configure the hardware via your `config.h`:
+```c
+// 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:
+// 0000 <-> GND
+// 0101 <-> SCL
+// 1010 <-> SDA
+// 1111 <-> VCC
+// ADDR represents A3:A0 of the 7-bit address.
+// The result is: 0b101(ADDR)
+#define DRIVER_ADDR_1 0b1010000
 #define DRIVER_ADDR_2 0b1010000 // this is here for compliancy reasons.
 #define DRIVER_COUNT 2
@@ -105,7 +183,7 @@ const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
 }
 ```
-Where `X_Y` is the location of the LED in the matrix defined by [the datasheet](https://www.issi.com/WW/pdf/31FL3733.pdf) and the header file `drivers/issi/is31fl3733.h`. The `driver` is the index of the driver you defined in your `config.h` (Only `0` right now).
+Where `X_Y` is the location of the LED in the matrix defined by [the datasheet](https://www.issi.com/WW/pdf/31FL3737.pdf) and the header file `drivers/issi/is31fl3737.h`. The `driver` is the index of the driver you defined in your `config.h` (Only `0` right now).
 ---
@@ -399,7 +477,7 @@ static bool my_cool_effect2(effect_params_t* params) {
 #endif // RGB_MATRIX_CUSTOM_EFFECT_IMPLS
 ```
-For inspiration and examples, check out the built-in effects under `quantum/rgb_matrix_animation/`
+For inspiration and examples, check out the built-in effects under `quantum/rgb_matrix_animations/`
 ## Colors :id=colors
@@ -437,7 +515,7 @@ These are defined in [`rgblight_list.h`](https://github.com/qmk/qmk_firmware/blo
 #define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (instead of keypresses)
 #define RGB_DISABLE_TIMEOUT 0 // number of milliseconds to wait until rgb automatically turns off
 #define RGB_DISABLE_AFTER_TIMEOUT 0 // OBSOLETE: 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 RGB_MATRIX_MAXIMUM_BRIGHTNESS 200 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
@@ -447,11 +525,13 @@ These are defined in [`rgblight_list.h`](https://github.com/qmk/qmk_firmware/blo
 #define RGB_MATRIX_STARTUP_VAL RGB_MATRIX_MAXIMUM_BRIGHTNESS // Sets the default brightness value, if none has been set
 #define RGB_MATRIX_STARTUP_SPD 127 // Sets the default animation speed, if none has been set
 #define RGB_MATRIX_DISABLE_KEYCODES // disables control of rgb matrix by keycodes (must use code functions to control the feature)
+#define RGB_MATRIX_SPLIT { X, Y }       // (Optional) For split keyboards, the number of LEDs connected on each half. X = left, Y = Right.
+                                        // If RGB_MATRIX_KEYPRESSES or RGB_MATRIX_KEYRELEASES is enabled, you also will want to enable SPLIT_TRANSPORT_MIRROR
 ```
 ## EEPROM storage :id=eeprom-storage
-The EEPROM for it is currently shared with the RGBLIGHT system (it's generally assumed only one RGB would be used at a time), but could be configured to use its own 32bit address with:
+The EEPROM for it is currently shared with the LED Matrix system (it's generally assumed only one feature would be used at a time), but could be configured to use its own 32bit address with:
 ```c
 #define EECONFIG_RGB_MATRIX (uint32_t *)28
diff --git a/docs/feature_rgblight.md b/docs/feature_rgblight.md
index 79977b7aa..994a014a2 100644
--- a/docs/feature_rgblight.md
+++ b/docs/feature_rgblight.md
@@ -74,6 +74,7 @@ Changing the **Value** sets the overall brightness.<br>
 |`RGB_MODE_XMAS`    |`RGB_M_X` |Christmas animation mode                                            |
 |`RGB_MODE_GRADIENT`|`RGB_M_G` |Static gradient animation mode                                      |
 |`RGB_MODE_RGBTEST` |`RGB_M_T` |Red, Green, Blue test animation mode                                |
+|`RGB_MODE_TWINKLE` |`RGB_M_TW`|Twinkle animation mode                                              |
 !> By default, if you have both the RGB Light and the [RGB Matrix](feature_rgb_matrix.md) feature enabled, these keycodes will work for both features, at the same time. You can disable the keycode functionality by defining the `*_DISABLE_KEYCODES` option for the specific feature.
@@ -309,6 +310,18 @@ void post_process_record_user(uint16_t keycode, keyrecord_t *record) {
 }
 ```
+You can also use `rgblight_blink_layer_repeat` to specify the amount of times the layer is supposed to blink. Using the layers from above,
+```c
+void post_process_record_user(uint16_t keycode, keyrecord_t *record) {
+    switch (keycode) {
+        case DEBUG:
+            rgblight_blink_layer_repeat(debug_enable ? 0 : 1, 200, 3);
+            break;
+    }
+}
+```
+would turn the layer 0 (or 1) on and off again three times when `DEBUG` is pressed.
 ### Overriding RGB Lighting on/off status
 Normally lighting layers are not shown when RGB Lighting is disabled (e.g. with `RGB_TOG` keycode). If you would like lighting layers to work even when the RGB Lighting is otherwise off, add `#define RGBLIGHT_LAYERS_OVERRIDE_RGB_OFF` to your `config.h`.
diff --git a/docs/feature_swap_hands.md b/docs/feature_swap_hands.md
index 009477d20..cbc574b6b 100644
--- a/docs/feature_swap_hands.md
+++ b/docs/feature_swap_hands.md
@@ -7,7 +7,7 @@ The swap-hands action allows support for one-handed typing without requiring a s
 The configuration table is a simple 2-dimensional array to map from column/row to new column/row. Example `hand_swap_config` for Planck:
 ```C
-const keypos_t hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
+const keypos_t PROGMEM hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
  {{11, 0}, {10, 0}, {9, 0}, {8, 0}, {7, 0}, {6, 0}, {5, 0}, {4, 0}, {3, 0}, {2, 0}, {1, 0}, {0, 0}},
  {{11, 1}, {10, 1}, {9, 1}, {8, 1}, {7, 1}, {6, 1}, {5, 1}, {4, 1}, {3, 1}, {2, 1}, {1, 1}, {0, 1}},
  {{11, 2}, {10, 2}, {9, 2}, {8, 2}, {7, 2}, {6, 2}, {5, 2}, {4, 2}, {3, 2}, {2, 2}, {1, 2}, {0, 2}},
diff --git a/docs/feature_unicode.md b/docs/feature_unicode.md
index 1208ac006..6c3e2a1a2 100644
--- a/docs/feature_unicode.md
+++ b/docs/feature_unicode.md
@@ -230,7 +230,7 @@ send_unicode_string("(ノಠ痊ಠ)ノ彡┻━┻");
 Example uses include sending Unicode strings when a key is pressed, as described in [Macros](feature_macros.md).
-### `send_unicode_hex_string()`
+### `send_unicode_hex_string()` (Deprecated)
 Similar to `send_unicode_string()`, but the characters are represented by their Unicode code points, written in hexadecimal and separated by spaces. For example, the table flip above would be achieved with:
diff --git a/docs/feature_wpm.md b/docs/feature_wpm.md
index 12dd08057..c8ec3a7f3 100644
--- a/docs/feature_wpm.md
+++ b/docs/feature_wpm.md
@@ -1,25 +1,62 @@
 # Word Per Minute (WPM) Calculcation
-The WPM feature uses time between keystrokes to compute a rolling average words
+The WPM feature uses time between keystrokes to compute a rolling average words per minute rate and makes this available for various uses.
-per minute rate and makes this available for various uses.
 Enable the WPM system by adding this to your `rules.mk`:
    WPM_ENABLE = yes
-For split keyboards using soft serial, the computed WPM
+For split keyboards using soft serial, the computed WPM score will be available on the master AND slave half.
-score will be available on the master AND slave half.
-## Public Functions
+## Configuration
-`uint8_t get_current_wpm(void);`
-This function returns the current WPM as an unsigned integer.
+|Define                       |Default       | Description                                                                              |
+|-----------------------------|--------------|------------------------------------------------------------------------------------------|
+|`WPM_SMOOTHING`              |`0.0487`      | Sets the smoothing to about 40 keystrokes                                                |
+|`WPM_ESTIMATED_WORD_SIZE`    |`5`           | This is the value used when estimating average word size (for regression and normal use) |
+|`WPM_ALLOW_COUNT_REGRESSOIN` |_Not defined_ | If defined allows the WPM to be decreased when hitting Delete or Backspace               |
+## Public Functions
-## Customized keys for WPM calc
+|Function                  |Description                                       |
+|--------------------------|--------------------------------------------------|
-By default, the WPM score only includes letters, numbers, space and some
+|`get_current_wpm(void)`   | Returns the current WPM as a value between 0-255 |
-punctuation.  If you want to change the set of characters considered as part of
+|`set_current_wpm(x)`      | Sets the current WPM to `x` (between 0-255)      |
-the WPM calculation, you can implement `wpm_keycode_user(uint16_t keycode)`
-and return true for any characters you would like included in the calculation,
+## Callbacks
-or false to not count that particular keycode.
+By default, the WPM score only includes letters, numbers, space and some punctuation.  If you want to change the set of characters considered as part of the WPM calculation, you can implement your own `bool wpm_keycode_user(uint16_t keycode)` and return true for any characters you would like included in the calculation, or false to not count that particular keycode.
+For instance, the default is:
+```c
+bool wpm_keycode_user(uint16_t keycode) {
+    if ((keycode >= QK_MOD_TAP && keycode <= QK_MOD_TAP_MAX) || (keycode >= QK_LAYER_TAP && keycode <= QK_LAYER_TAP_MAX) || (keycode >= QK_MODS && keycode <= QK_MODS_MAX)) {
+        keycode = keycode & 0xFF;
+    } else if (keycode > 0xFF) {
+        keycode = 0;
+    }
+    if ((keycode >= KC_A && keycode <= KC_0) || (keycode >= KC_TAB && keycode <= KC_SLASH)) {
+        return true;
+    }
+    return false;
+}
+```
+Additionally, if `WPM_ALLOW_COUNT_REGRESSION` is defined, there is the `uint8_t wpm_regress_count(uint16_t keycode)` function that allows you to decrease the WPM. This is useful if you want to be able to penalize certain keycodes (or even combinations). 
+__attribute__((weak)) uint8_t wpm_regress_count(uint16_t keycode) {
+    bool weak_modded = (keycode >= QK_LCTL && keycode < QK_LSFT) || (keycode >= QK_RCTL && keycode < QK_RSFT);
+    
+    if ((keycode >= QK_MOD_TAP && keycode <= QK_MOD_TAP_MAX) || (keycode >= QK_LAYER_TAP && keycode <= QK_LAYER_TAP_MAX) || (keycode >= QK_MODS && keycode <= QK_MODS_MAX)) {
+        keycode = keycode & 0xFF;
+    } else if (keycode > 0xFF) {
+        keycode = 0;
+    }
+    if (((get_mods() | get_oneshot_mods()) & MOD_MASK_CTRL} || weak_modded) && (keycode == KC_DEL || keycode == KC_BSPC)) {
+        return WPM_ESTIMATED_WORD_SIZE;
+    }
+    if (keycode == KC_DEL || keycode == KC_BSPC) {
+        return 1;
+    }
+}
diff --git a/docs/flashing.md b/docs/flashing.md
index 7804a6bad..83c97444e 100644
--- a/docs/flashing.md
+++ b/docs/flashing.md
@@ -249,3 +249,29 @@ Flashing sequence:
 2. Wait for the OS to detect the device
 3. Flash a .bin file
 4. Reset the device into application mode (may be done automatically)
+## tinyuf2
+Keyboards may opt into supporting the tinyuf2 bootloader. This is currently only supported on the F411 blackpill.
+The `rules.mk` setting for this bootloader is `tinyuf2`, and can be specified at the keymap or user level.
+To ensure compatibility with the tinyuf2 bootloader, make sure this block is present in your `rules.mk`:
+```make
+# Bootloader selection
+BOOTLOADER = tinyuf2
+```
+Compatible flashers:
+* Any application able to copy a file from one place to another, such as _macOS Finder_ or _Windows Explorer_.
+Flashing sequence:
+1. Enter the bootloader using any of the following methods:
+    * Tap the `RESET` keycode
+    * Double-tap the `nRST` button on the PCB.
+2. Wait for the OS to detect the device
+3. Copy the .uf2 file to the new USB disk
+4. Wait for the keyboard to become available
diff --git a/docs/ja/compatible_microcontrollers.md b/docs/ja/compatible_microcontrollers.md
index fdd11f14f..b675b038d 100644
--- a/docs/ja/compatible_microcontrollers.md
+++ b/docs/ja/compatible_microcontrollers.md
@@ -33,8 +33,11 @@ QMK は十分な容量のフラッシュメモリを備えた USB 対応 AVR ま
 * [STM32F303](https://www.st.com/en/microcontrollers-microprocessors/stm32f303.html)
 * [STM32F401](https://www.st.com/en/microcontrollers-microprocessors/stm32f401.html)
 * [STM32F411](https://www.st.com/en/microcontrollers-microprocessors/stm32f411.html)
+* [STM32F446](https://www.st.com/en/microcontrollers-microprocessors/stm32f446.html)
 * [STM32G431](https://www.st.com/en/microcontrollers-microprocessors/stm32g4x1.html)
 * [STM32G474](https://www.st.com/en/microcontrollers-microprocessors/stm32g4x4.html)
+* [STM32L433](https://www.st.com/en/microcontrollers-microprocessors/stm32l4x3.html)
+* [STM32L443](https://www.st.com/en/microcontrollers-microprocessors/stm32l4x3.html)
 ### NXP (Kinetis)
diff --git a/docs/ja/feature_led_matrix.md b/docs/ja/feature_led_matrix.md
index b73487ca6..62e22859f 100644
--- a/docs/ja/feature_led_matrix.md
+++ b/docs/ja/feature_led_matrix.md
@@ -76,7 +76,7 @@ I2C IS31FL3731 RGB コントローラを使ったアドレス指定可能な LED
 カスタムレイヤー効果は `<keyboard>.c` 内で以下を定義することで行うことができます:
    void led_matrix_indicators_kb(void) {
-    led_matrix_set_index_value(index, value);
+    led_matrix_set_value(index, value);
    }
 同様の関数がキーマップ内で `led_matrix_indicators_user` として動作します。
diff --git a/docs/ja/feature_swap_hands.md b/docs/ja/feature_swap_hands.md
index 3150801c5..5164584e8 100644
--- a/docs/ja/feature_swap_hands.md
+++ b/docs/ja/feature_swap_hands.md
@@ -12,7 +12,7 @@
 設定テーブルは列/行から新しい列/行にマップするための単純な2次元配列です。Planck の `hand_swap_config` の例:
 ```C
-const keypos_t hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
+const keypos_t PROGMEM hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
  {{11, 0}, {10, 0}, {9, 0}, {8, 0}, {7, 0}, {6, 0}, {5, 0}, {4, 0}, {3, 0}, {2, 0}, {1, 0}, {0, 0}},
  {{11, 1}, {10, 1}, {9, 1}, {8, 1}, {7, 1}, {6, 1}, {5, 1}, {4, 1}, {3, 1}, {2, 1}, {1, 1}, {0, 1}},
  {{11, 2}, {10, 2}, {9, 2}, {8, 2}, {7, 2}, {6, 2}, {5, 2}, {4, 2}, {3, 2}, {2, 2}, {1, 2}, {0, 2}},
diff --git a/docs/keycodes.md b/docs/keycodes.md
index 9acf8b683..f3c519b13 100644
--- a/docs/keycodes.md
+++ b/docs/keycodes.md
@@ -516,6 +516,9 @@ See also: [One Shot Keys](one_shot_keys.md)
 |------------|----------------------------------|
 |`OSM(mod)`  |Hold `mod` for one keypress       |
 |`OSL(layer)`|Switch to `layer` for one keypress|
+|`OS_ON`     |Turns One Shot keys on            |
+|`OS_OFF`    |Turns One Shot keys off           |
+|`OS_TOGG`   |Toggles One Shot keys status      |
 ## Space Cadet :id=space-cadet
diff --git a/docs/one_shot_keys.md b/docs/one_shot_keys.md
index 9a082d7d6..9fc548629 100644
--- a/docs/one_shot_keys.md
+++ b/docs/one_shot_keys.md
@@ -17,6 +17,9 @@ You can control the behavior of one shot keys by defining these in `config.h`:
 * `OSM(mod)` - Momentarily hold down *mod*. You must use the `MOD_*` keycodes as shown in [Mod Tap](mod_tap.md), not the `KC_*` codes.
 * `OSL(layer)` - momentary switch to *layer*.
+* `OS_ON` - Turns on One Shot keys.
+* `OS_OFF` - Turns off One Shot keys. OSM act as regular mod keys, OSL act like `MO`.
+* `ON_TOGG` - Toggles the one shot key status.
 Sometimes, you want to activate a one-shot key as part of a macro or tap dance routine.  
diff --git a/docs/ws2812_driver.md b/docs/ws2812_driver.md
index cca6827ec..e69400364 100644
--- a/docs/ws2812_driver.md
+++ b/docs/ws2812_driver.md
@@ -77,6 +77,25 @@ Configure the hardware via your config.h:
 You must also turn on the SPI feature in your halconf.h and mcuconf.h
+#### Circular Buffer Mode
+Some boards may flicker while in the normal buffer mode. To fix this issue, circular buffer mode may be used to rectify the issue. 
+By default, the circular buffer mode is disabled.
+To enable this alternative buffer mode, place this into your `config.h` file:
+```c
+#define WS2812_SPI_USE_CIRCULAR_BUFFER
+```
+#### Setting baudrate with divisor
+To adjust the baudrate at which the SPI peripheral is configured, users will need to derive the target baudrate from the clock tree provided by STM32CubeMX.
+Only divisors of 2, 4, 8, 16, 32, 64, 128 and 256 are supported by hardware.
+|Define              |Default|Description                          |
+|--------------------|-------|-------------------------------------|
+|`WS2812_SPI_DIVISOR`|`16`   |SPI source clock peripheral divisor  |
 #### Testing Notes
 While not an exhaustive list, the following table provides the scenarios that have been partially validated:
@@ -102,11 +121,14 @@ Configure the hardware via your config.h:
 #define WS2812_PWM_DRIVER PWMD2  // default: PWMD2
 #define WS2812_PWM_CHANNEL 2  // default: 2
 #define WS2812_PWM_PAL_MODE 2  // Pin "alternate function", see the respective datasheet for the appropriate values for your MCU. default: 2
+//#define WS2812_PWM_COMPLEMENTARY_OUTPUT // Define for a complementary timer output (TIMx_CHyN); omit for a normal timer output (TIMx_CHy).
 #define WS2812_DMA_STREAM STM32_DMA1_STREAM2  // DMA Stream for TIMx_UP, see the respective reference manual for the appropriate values for your MCU.
 #define WS2812_DMA_CHANNEL 2  // DMA Channel for TIMx_UP, see the respective reference manual for the appropriate values for your MCU.
 #define WS2812_DMAMUX_ID STM32_DMAMUX1_TIM2_UP // DMAMUX configuration for TIMx_UP -- only required if your MCU has a DMAMUX peripheral, see the respective reference manual for the appropriate values for your MCU.
 ```
+Note that using a complementary timer output (TIMx_CHyN) is possible only for advanced-control timers (TIM1, TIM8, TIM20 on STM32), and the `STM32_PWM_USE_ADVANCED` option in mcuconf.h must be set to `TRUE`.  Complementary outputs of general-purpose timers are not supported due to ChibiOS limitations.
 You must also turn on the PWM feature in your halconf.h and mcuconf.h
 #### Testing Notes