8 files changed, 1380 insertions, 11 deletions

diff --git a/common_features.mk b/common_features.mk
index 8c3361732..8c7043cb7 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -114,8 +114,26 @@ ifeq ($(strip $(RGBLIGHT_ENABLE)), yes)
     endif
 endif
 
-RGB_MATRIX_ENABLE ?= no
 VALID_MATRIX_TYPES := yes IS31FL3731 IS31FL3733 custom
+
+LED_MATRIX_ENABLE ?= no
+ifneq ($(strip $(LED_MATRIX_ENABLE)), no)
+ifeq ($(filter $(LED_MATRIX_ENABLE),$(VALID_MATRIX_TYPES)),)
+    $(error LED_MATRIX_ENABLE="$(LED_MATRIX_ENABLE)" is not a valid matrix type)
+endif
+    OPT_DEFS += -DLED_MATRIX_ENABLE
+    SRC += $(QUANTUM_DIR)/led_matrix.c
+    SRC += $(QUANTUM_DIR)/led_matrix_drivers.c
+endif
+
+ifeq ($(strip $(LED_MATRIX_ENABLE)), IS31FL3731)
+    OPT_DEFS += -DIS31FL3731
+    COMMON_VPATH += $(DRIVER_PATH)/issi
+    SRC += is31fl3731-simple.c
+    SRC += i2c_master.c
+endif
+
+RGB_MATRIX_ENABLE ?= no
 ifneq ($(strip $(RGB_MATRIX_ENABLE)), no)
 ifeq ($(filter $(RGB_MATRIX_ENABLE),$(VALID_MATRIX_TYPES)),)
     $(error RGB_MATRIX_ENABLE="$(RGB_MATRIX_ENABLE)" is not a valid matrix type)
diff --git a/docs/feature_led_matrix.md b/docs/feature_led_matrix.md
new file mode 100644
index 000000000..5a62cc530
--- /dev/null
+++ b/docs/feature_led_matrix.md
@@ -0,0 +1,217 @@
+# RGB Matrix Lighting
+
+## Driver configuration
+
+### IS31FL3731
+
+There is basic support for addressable RGB matrix lighting with the I2C IS31FL3731 RGB controller. To enable it, add this to your `rules.mk`:
+
+    LED_MATRIX_ENABLE = IS31FL3731
+
+Configure the hardware via your `config.h`:
+
+        // 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:
+        // 0b1110100 AD <-> GND
+        // 0b1110111 AD <-> VCC
+        // 0b1110101 AD <-> SCL
+        // 0b1110110 AD <-> SDA
+        #define LED_DRIVER_ADDR_1 0b1110100
+        #define LED_DRIVER_ADDR_2 0b1110110
+
+        #define LED_DRIVER_COUNT 2
+        #define LED_DRIVER_1_LED_TOTAL 25
+        #define LED_DRIVER_2_LED_TOTAL 24
+        #define LED_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.
+
+Define these arrays listing all the LEDs in your `<keyboard>.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, C1_3,  C2_3,  C3_3},
+            ....
+        }
+
+Where `Cx_y` is the location of the LED in the matrix defined by [the datasheet](http://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).
+
+###  IS31FL3733
+
+There is basic support for addressable RGB matrix lighting with the I2C IS31FL3733 RGB controller. To enable it, add this to your `rules.mk`:
+
+    RGB_MATRIX_ENABLE = IS31FL3733
+
+Configure the hardware via your `config.h`:
+
+        // 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:
+        // 00 <-> GND
+        // 01 <-> SCL
+        // 10 <-> SDA
+        // 11 <-> VCC
+        // ADDR1 represents A1:A0 of the 7-bit address.
+        // ADDR2 represents A3:A2 of the 7-bit address.
+        // The result is: 0b101(ADDR2)(ADDR1)
+        #define DRIVER_ADDR_1 0b1010000
+        #define DRIVER_ADDR_2 0b1010000 // this is here for compliancy reasons.
+
+        #define DRIVER_COUNT 1
+        #define DRIVER_1_LED_TOTAL 64
+        #define DRIVER_LED_TOTAL DRIVER_1_LED_TOTAL
+
+Currently only a single drivers is supported, but it would be trivial to support all 4 combinations. For now define `DRIVER_ADDR_2` as `DRIVER_ADDR_1`
+
+Define these arrays listing all the LEDs in your `<keyboard>.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](http://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).
+
+From this point forward the configuration is the same for all the drivers. 
+
+        const rgb_led g_rgb_leds[DRIVER_LED_TOTAL] = {
+        /* {row | col << 4}
+         *    |           {x=0..224, y=0..64}
+         *    |              |               modifier
+         *    |              |                 | */
+            {{0|(0<<4)},   {20.36*0, 21.33*0}, 1},
+            {{0|(1<<4)},   {20.36*1, 21.33*0}, 1},
+            ....
+        }
+
+The format for the matrix position used in this array is `{row | (col << 4)}`. The `x` is between (inclusive) 0-224, and `y` is between (inclusive) 0-64. The easiest way to calculate these positions is:
+
+    x = 224 / ( NUMBER_OF_ROWS - 1 ) * ROW_POSITION
+    y = 64 / (NUMBER_OF_COLS - 1 ) * COL_POSITION
+
+Where all variables are decimels/floats.
+
+`modifier` is a boolean, whether or not a certain key is considered a modifier (used in some effects).
+
+## Keycodes
+
+All RGB keycodes are currently shared with the RGBLIGHT system:
+
+        * `RGB_TOG` - toggle
+        * `RGB_MOD` - cycle through modes
+        * `RGB_HUI` - increase hue
+        * `RGB_HUD` - decrease hue
+        * `RGB_SAI` - increase saturation
+        * `RGB_SAD` - decrease saturation
+        * `RGB_VAI` - increase value
+        * `RGB_VAD` - decrease value
+        * `RGB_SPI` - increase speed effect (no EEPROM support)
+        * `RGB_SPD` - decrease speed effect (no EEPROM support)
+
+
+        * `RGB_MODE_*` keycodes will generally work, but are not currently mapped to the correct effects for the RGB Matrix system
+
+## RGB Matrix Effects
+
+These are the effects that are currently available:
+
+        enum rgb_matrix_effects {
+            RGB_MATRIX_SOLID_COLOR = 1,
+            RGB_MATRIX_ALPHAS_MODS,
+            RGB_MATRIX_DUAL_BEACON,
+            RGB_MATRIX_GRADIENT_UP_DOWN,
+            RGB_MATRIX_RAINDROPS,
+            RGB_MATRIX_CYCLE_ALL,
+            RGB_MATRIX_CYCLE_LEFT_RIGHT,
+            RGB_MATRIX_CYCLE_UP_DOWN,
+            RGB_MATRIX_RAINBOW_BEACON,
+            RGB_MATRIX_RAINBOW_PINWHEELS,
+            RGB_MATRIX_RAINBOW_MOVING_CHEVRON,
+            RGB_MATRIX_JELLYBEAN_RAINDROPS,
+            RGB_MATRIX_DIGITAL_RAIN,
+        #ifdef RGB_MATRIX_KEYPRESSES
+            RGB_MATRIX_SOLID_REACTIVE,
+            RGB_MATRIX_SPLASH,
+            RGB_MATRIX_MULTISPLASH,
+            RGB_MATRIX_SOLID_SPLASH,
+            RGB_MATRIX_SOLID_MULTISPLASH,
+        #endif
+            RGB_MATRIX_EFFECT_MAX
+        };
+    
+You can disable a single effect by defining `DISABLE_[EFFECT_NAME]` in your `config.h`:
+
+
+|Define                                             |Description                                 |
+|---------------------------------------------------|--------------------------------------------|
+|`#define DISABLE_RGB_MATRIX_ALPHAS_MODS`           |Disables `RGB_MATRIX_ALPHAS_MODS`           |
+|`#define DISABLE_RGB_MATRIX_DUAL_BEACON`           |Disables `RGB_MATRIX_DUAL_BEACON`           |
+|`#define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN`      |Disables `RGB_MATRIX_GRADIENT_UP_DOWN`      |
+|`#define DISABLE_RGB_MATRIX_RAINDROPS`             |Disables `RGB_MATRIX_RAINDROPS`             |
+|`#define DISABLE_RGB_MATRIX_CYCLE_ALL`             |Disables `RGB_MATRIX_CYCLE_ALL`             |
+|`#define DISABLE_RGB_MATRIX_CYCLE_LEFT_RIGHT`      |Disables `RGB_MATRIX_CYCLE_LEFT_RIGHT`      |
+|`#define DISABLE_RGB_MATRIX_CYCLE_UP_DOWN`         |Disables `RGB_MATRIX_CYCLE_UP_DOWN`         |
+|`#define DISABLE_RGB_MATRIX_RAINBOW_BEACON`        |Disables `RGB_MATRIX_RAINBOW_BEACON`        |
+|`#define DISABLE_RGB_MATRIX_RAINBOW_PINWHEELS`     |Disables `RGB_MATRIX_RAINBOW_PINWHEELS`     |
+|`#define DISABLE_RGB_MATRIX_RAINBOW_MOVING_CHEVRON`|Disables `RGB_MATRIX_RAINBOW_MOVING_CHEVRON`|
+|`#define DISABLE_RGB_MATRIX_JELLYBEAN_RAINDROPS`   |Disables `RGB_MATRIX_JELLYBEAN_RAINDROPS`   |
+|`#define DISABLE_RGB_MATRIX_DIGITAL_RAIN`          |Disables `RGB_MATRIX_DIGITAL_RAIN`          |
+|`#define DISABLE_RGB_MATRIX_SOLID_REACTIVE`        |Disables `RGB_MATRIX_SOLID_REACTIVE`        |
+|`#define DISABLE_RGB_MATRIX_SPLASH`                |Disables `RGB_MATRIX_SPLASH`                |
+|`#define DISABLE_RGB_MATRIX_MULTISPLASH`           |Disables `RGB_MATRIX_MULTISPLASH`           |
+|`#define DISABLE_RGB_MATRIX_SOLID_SPLASH`          |Disables `RGB_MATRIX_SOLID_SPLASH`          |
+|`#define DISABLE_RGB_MATRIX_SOLID_MULTISPLASH`     |Disables `RGB_MATRIX_SOLID_MULTISPLASH`     |
+
+
+## Custom layer effects
+
+Custom layer effects can be done by defining this in your `<keyboard>.c`:
+
+    void rgb_matrix_indicators_kb(void) {
+        rgb_matrix_set_color(index, red, green, blue);
+    }
+
+A similar function works in the keymap as `rgb_matrix_indicators_user`.
+
+## Additional `config.h` Options
+
+        #define RGB_MATRIX_KEYPRESSES // reacts to keypresses (will slow down matrix scan by a lot)
+        #define RGB_MATRIX_KEYRELEASES // reacts to keyreleases (not recommened)
+        #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_MATRIX_SKIP_FRAMES 1 // number of frames to skip when displaying animations (0 is full effect) if not defined defaults to 1
+    #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
+
+## 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:
+
+    #define EECONFIG_RGB_MATRIX (uint32_t *)16
+
+Where `16` is an unused index from `eeconfig.h`.
+
+## Suspended state
+
+To use the suspend feature, add this to your `<keyboard>.c`:
+
+        void suspend_power_down_kb(void)
+        {
+            rgb_matrix_set_suspend_state(true);
+        }
+
+        void suspend_wakeup_init_kb(void)
+        {
+            rgb_matrix_set_suspend_state(false);
+        }
diff --git a/drivers/issi/is31fl3731-simple.c b/drivers/issi/is31fl3731-simple.c
new file mode 100644
index 000000000..46d51dac7
--- /dev/null
+++ b/drivers/issi/is31fl3731-simple.c
@@ -0,0 +1,240 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ *
+ * 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/>.
+ */
+
+#ifdef __AVR__
+#include <avr/interrupt.h>
+#include <avr/io.h>
+#include <util/delay.h>
+#else
+#include "wait.h"
+#endif
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include "is31fl3731-simple.h"
+#include "i2c_master.h"
+#include "progmem.h"
+
+// 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:
+// 0b1110100 AD <-> GND
+// 0b1110111 AD <-> VCC
+// 0b1110101 AD <-> SCL
+// 0b1110110 AD <-> SDA
+#define ISSI_ADDR_DEFAULT 0x74
+
+#define ISSI_REG_CONFIG  0x00
+#define ISSI_REG_CONFIG_PICTUREMODE 0x00
+#define ISSI_REG_CONFIG_AUTOPLAYMODE 0x08
+#define ISSI_REG_CONFIG_AUDIOPLAYMODE 0x18
+
+#define ISSI_CONF_PICTUREMODE 0x00
+#define ISSI_CONF_AUTOFRAMEMODE 0x04
+#define ISSI_CONF_AUDIOMODE 0x08
+
+#define ISSI_REG_PICTUREFRAME  0x01
+
+#define ISSI_REG_SHUTDOWN 0x0A
+#define ISSI_REG_AUDIOSYNC 0x06
+
+#define ISSI_COMMANDREGISTER 0xFD
+#define ISSI_BANK_FUNCTIONREG 0x0B    // helpfully called 'page nine'
+
+#ifndef ISSI_TIMEOUT
+  #define ISSI_TIMEOUT 100
+#endif
+
+#ifndef ISSI_PERSISTENCE
+  #define ISSI_PERSISTENCE 0
+#endif
+
+// Transfer buffer for TWITransmitData()
+uint8_t g_twi_transfer_buffer[20];
+
+// These buffers match the IS31FL3731 PWM registers 0x24-0xB3.
+// Storing them like this is optimal for I2C transfers to the registers.
+// We could optimize this and take out the unused registers from these
+// buffers and the transfers in IS31FL3731_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+uint8_t g_pwm_buffer[DRIVER_COUNT][144];
+bool g_pwm_buffer_update_required = false;
+
+uint8_t g_led_control_registers[DRIVER_COUNT][18] = { { 0 }, { 0 } };
+bool g_led_control_registers_update_required = false;
+
+// This is the bit pattern in the LED control registers
+// (for matrix A, add one to register for matrix B)
+//
+//  reg -  b7  b6  b5  b4  b3  b2  b1  b0
+// 0x00 - R08,R07,R06,R05,R04,R03,R02,R01
+// 0x02 - G08,G07,G06,G05,G04,G03,G02,R00
+// 0x04 - B08,B07,B06,B05,B04,B03,G01,G00
+// 0x06 -  - , - , - , - , - ,B02,B01,B00
+// 0x08 -  - , - , - , - , - , - , - , -
+// 0x0A - B17,B16,B15, - , - , - , - , -
+// 0x0C - G17,G16,B14,B13,B12,B11,B10,B09
+// 0x0E - R17,G15,G14,G13,G12,G11,G10,G09
+// 0x10 - R16,R15,R14,R13,R12,R11,R10,R09
+
+
+void IS31FL3731_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    g_twi_transfer_buffer[0] = reg;
+    g_twi_transfer_buffer[1] = data;
+
+    #if ISSI_PERSISTENCE > 0
+        for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT) == 0) {
+              break;
+            }
+        }
+    #else
+        i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT);
+    #endif
+}
+
+void IS31FL3731_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // assumes bank is already selected
+
+    // transmit PWM registers in 9 transfers of 16 bytes
+    // g_twi_transfer_buffer[] is 20 bytes
+
+    // iterate over the pwm_buffer contents at 16 byte intervals
+    for (int i = 0; i < 144; i += 16) {
+        // set the first register, e.g. 0x24, 0x34, 0x44, etc.
+        g_twi_transfer_buffer[0] = 0x24 + i;
+        // copy the data from i to i+15
+        // device will auto-increment register for data after the first byte
+        // thus this sets registers 0x24-0x33, 0x34-0x43, etc. in one transfer
+        for (int j = 0; j < 16; j++) {
+            g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j];
+        }
+
+    #if ISSI_PERSISTENCE > 0
+      for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT) == 0)
+          break;
+      }
+    #else
+      i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT);
+    #endif
+    }
+}
+
+void IS31FL3731_init(uint8_t addr) {
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, first enable software shutdown,
+    // then set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+
+    // select "function register" bank
+    IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG);
+
+    // enable software shutdown
+    IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x00);
+    // this delay was copied from other drivers, might not be needed
+    // FIXME: Don't we have a wrapper for this already?
+    #ifdef __AVR__
+    _delay_ms(10);
+    #else
+    wait_ms(10);
+    #endif
+
+    // picture mode
+    IS31FL3731_write_register(addr, ISSI_REG_CONFIG, ISSI_REG_CONFIG_PICTUREMODE);
+    // display frame 0
+    IS31FL3731_write_register(addr, ISSI_REG_PICTUREFRAME, 0x00);
+    // audio sync off
+    IS31FL3731_write_register(addr, ISSI_REG_AUDIOSYNC, 0x00);
+
+    // select bank 0
+    IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, 0);
+
+    // turn off all LEDs in the LED control register
+    for (int i = 0x00; i <= 0x11; i++) {
+        IS31FL3731_write_register(addr, i, 0x00);
+    }
+
+    // turn off all LEDs in the blink control register (not really needed)
+    for (int i = 0x12; i <= 0x23; i++) {
+        IS31FL3731_write_register(addr, i, 0x00);
+    }
+
+    // set PWM on all LEDs to 0
+    for (int i = 0x24; i <= 0xB3; i++) {
+        IS31FL3731_write_register(addr, i, 0x00);
+    }
+
+    // select "function register" bank
+    IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG);
+
+    // disable software shutdown
+    IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x01);
+
+    // select bank 0 and leave it selected.
+    // most usage after initialization is just writing PWM buffers in bank 0
+    // as there's not much point in double-buffering
+    IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, 0);
+
+}
+
+void IS31FL3731_set_value(int index, uint8_t value) {
+    if (index >= 0 && index < DRIVER_LED_TOTAL) {
+        is31_led led = g_is31_leds[index];
+
+        // Subtract 0x24 to get the second index of g_pwm_buffer
+        g_pwm_buffer[led.driver][led.v - 0x24] = value;
+        g_pwm_buffer_update_required = true;
+    }
+}
+
+void IS31FL3731_set_value_all(uint8_t value) {
+    for (int i = 0; i < DRIVER_LED_TOTAL; i++) {
+        IS31FL3731_set_value(i, value);
+    }
+}
+
+void IS31FL3731_set_led_control_register(uint8_t index, bool value) {
+  is31_led led = g_is31_leds[index];
+
+  uint8_t control_register = (led.v - 0x24) / 8;
+  uint8_t bit_value = (led.v - 0x24) % 8;
+
+    if (value) {
+        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
+    } else {
+        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
+    }
+
+    g_led_control_registers_update_required = true;
+}
+
+void IS31FL3731_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required) {
+        IS31FL3731_write_pwm_buffer(addr, g_pwm_buffer[index]);
+        g_pwm_buffer_update_required = false;
+    }
+}
+
+void IS31FL3731_update_led_control_registers(uint8_t addr, uint8_t index) {
+    if (g_led_control_registers_update_required) {
+        for (int i=0; i<18; i++) {
+            IS31FL3731_write_register(addr, i, g_led_control_registers[index][i]);
+        }
+    }
+}
diff --git a/drivers/issi/is31fl3731-simple.h b/drivers/issi/is31fl3731-simple.h
new file mode 100644
index 000000000..c102837a3
--- /dev/null
+++ b/drivers/issi/is31fl3731-simple.h
@@ -0,0 +1,209 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ *
+ * 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/>.
+ */
+
+
+#ifndef IS31FL3731_DRIVER_H
+#define IS31FL3731_DRIVER_H
+
+
+typedef struct is31_led {
+  uint8_t driver:2;
+  uint8_t v;
+} __attribute__((packed)) is31_led;
+
+extern const is31_led g_is31_leds[DRIVER_LED_TOTAL];
+
+void IS31FL3731_init(uint8_t addr);
+void IS31FL3731_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void IS31FL3731_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void IS31FL3731_set_value(int index, uint8_t value);
+void IS31FL3731_set_value_all(uint8_t value);
+
+void IS31FL3731_set_led_control_register(uint8_t index, bool value);
+
+// This should not be called from an interrupt
+// (eg. from a timer interrupt).
+// Call this while idle (in between matrix scans).
+// If the buffer is dirty, it will update the driver with the buffer.
+void IS31FL3731_update_pwm_buffers(uint8_t addr, uint8_t index);
+void IS31FL3731_update_led_control_registers(uint8_t addr, uint8_t index);
+
+#define C1_1  0x24
+#define C1_2  0x25
+#define C1_3  0x26
+#define C1_4  0x27
+#define C1_5  0x28
+#define C1_6  0x29
+#define C1_7  0x2A
+#define C1_8  0x2B
+
+#define C1_9  0x2C
+#define C1_10 0x2D
+#define C1_11 0x2E
+#define C1_12 0x2F
+#define C1_13 0x30
+#define C1_14 0x31
+#define C1_15 0x32
+#define C1_16 0x33
+
+#define C2_1  0x34
+#define C2_2  0x35
+#define C2_3  0x36
+#define C2_4  0x37
+#define C2_5  0x38
+#define C2_6  0x39
+#define C2_7  0x3A
+#define C2_8  0x3B
+
+#define C2_9  0x3C
+#define C2_10 0x3D
+#define C2_11 0x3E
+#define C2_12 0x3F
+#define C2_13 0x40
+#define C2_14 0x41
+#define C2_15 0x42
+#define C2_16 0x43
+
+#define C3_1  0x44
+#define C3_2  0x45
+#define C3_3  0x46
+#define C3_4  0x47
+#define C3_5  0x48
+#define C3_6  0x49
+#define C3_7  0x4A
+#define C3_8  0x4B
+
+#define C3_9  0x4C
+#define C3_10 0x4D
+#define C3_11 0x4E
+#define C3_12 0x4F
+#define C3_13 0x50
+#define C3_14 0x51
+#define C3_15 0x52
+#define C3_16 0x53
+
+#define C4_1  0x54
+#define C4_2  0x55
+#define C4_3  0x56
+#define C4_4  0x57
+#define C4_5  0x58
+#define C4_6  0x59
+#define C4_7  0x5A
+#define C4_8  0x5B
+
+#define C4_9  0x5C
+#define C4_10 0x5D
+#define C4_11 0x5E
+#define C4_12 0x5F
+#define C4_13 0x60
+#define C4_14 0x61
+#define C4_15 0x62
+#define C4_16 0x63
+
+#define C5_1  0x64
+#define C5_2  0x65
+#define C5_3  0x66
+#define C5_4  0x67
+#define C5_5  0x68
+#define C5_6  0x69
+#define C5_7  0x6A
+#define C5_8  0x6B
+
+#define C5_9  0x6C
+#define C5_10 0x6D
+#define C5_11 0x6E
+#define C5_12 0x6F
+#define C5_13 0x70
+#define C5_14 0x71
+#define C5_15 0x72
+#define C5_16 0x73
+
+#define C6_1  0x74
+#define C6_2  0x75
+#define C6_3  0x76
+#define C6_4  0x77
+#define C6_5  0x78
+#define C6_6  0x79
+#define C6_7  0x7A
+#define C6_8  0x7B
+
+#define C6_9  0x7C
+#define C6_10 0x7D
+#define C6_11 0x7E
+#define C6_12 0x7F
+#define C6_13 0x80
+#define C6_14 0x81
+#define C6_15 0x82
+#define C6_16 0x83
+
+#define C7_1  0x84
+#define C7_2  0x85
+#define C7_3  0x86
+#define C7_4  0x87
+#define C7_5  0x88
+#define C7_6  0x89
+#define C7_7  0x8A
+#define C7_8  0x8B
+
+#define C7_9  0x8C
+#define C7_10 0x8D
+#define C7_11 0x8E
+#define C7_12 0x8F
+#define C7_13 0x90
+#define C7_14 0x91
+#define C7_15 0x92
+#define C7_16 0x93
+
+#define C8_1  0x94
+#define C8_2  0x95
+#define C8_3  0x96
+#define C8_4  0x97
+#define C8_5  0x98
+#define C8_6  0x99
+#define C8_7  0x9A
+#define C8_8  0x9B
+
+#define C8_9  0x9C
+#define C8_10 0x9D
+#define C8_11 0x9E
+#define C8_12 0x9F
+#define C8_13 0xA0
+#define C8_14 0xA1
+#define C8_15 0xA2
+#define C8_16 0xA3
+
+#define C9_1  0xA4
+#define C9_2  0xA5
+#define C9_3  0xA6
+#define C9_4  0xA7
+#define C9_5  0xA8
+#define C9_6  0xA9
+#define C9_7  0xAA
+#define C9_8  0xAB
+
+#define C9_9  0xAC
+#define C9_10 0xAD
+#define C9_11 0xAE
+#define C9_12 0xAF
+#define C9_13 0xB0
+#define C9_14 0xB1
+#define C9_15 0xB2
+#define C9_16 0xB3
+
+
+#endif // IS31FL3731_DRIVER_H
diff --git a/quantum/led_matrix.c b/quantum/led_matrix.c
new file mode 100644
index 000000000..9a0aa6acd
--- /dev/null
+++ b/quantum/led_matrix.c
@@ -0,0 +1,404 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2017 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2019 Clueboard
+ *
+ * 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 <stdint.h>
+#include <stdbool.h>
+#include "quantum.h"
+#include "led_matrix.h"
+#include "progmem.h"
+#include "config.h"
+#include "eeprom.h"
+#include <string.h>
+#include <math.h>
+
+led_config_t led_matrix_config;
+
+#ifndef MAX
+    #define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
+#endif
+
+#ifndef MIN
+    #define MIN(a,b) ((a) < (b)? (a): (b))
+#endif
+
+#ifndef LED_DISABLE_AFTER_TIMEOUT
+    #define LED_DISABLE_AFTER_TIMEOUT 0
+#endif
+
+#ifndef LED_DISABLE_WHEN_USB_SUSPENDED
+    #define LED_DISABLE_WHEN_USB_SUSPENDED false
+#endif
+
+#ifndef EECONFIG_LED_MATRIX
+    #define EECONFIG_LED_MATRIX EECONFIG_RGBLIGHT
+#endif
+
+#if !defined(LED_MATRIX_MAXIMUM_BRIGHTNESS) || LED_MATRIX_MAXIMUM_BRIGHTNESS > 255
+    #define LED_MATRIX_MAXIMUM_BRIGHTNESS 255
+#endif
+
+bool g_suspend_state = false;
+
+// Global tick at 20 Hz
+uint32_t g_tick = 0;
+
+// Ticks since this key was last hit.
+uint8_t g_key_hit[DRIVER_LED_TOTAL];
+
+// Ticks since any key was last hit.
+uint32_t g_any_key_hit = 0;
+
+uint32_t eeconfig_read_led_matrix(void) {
+  return eeprom_read_dword(EECONFIG_LED_MATRIX);
+}
+void eeconfig_update_led_matrix(uint32_t config_value) {
+  eeprom_update_dword(EECONFIG_LED_MATRIX, config_value);
+}
+void eeconfig_update_led_matrix_default(void) {
+  dprintf("eeconfig_update_led_matrix_default\n");
+  led_matrix_config.enable = 1;
+  led_matrix_config.mode = LED_MATRIX_UNIFORM_BRIGHTNESS;
+  led_matrix_config.val = 128;
+  led_matrix_config.speed = 0;
+  eeconfig_update_led_matrix(led_matrix_config.raw);
+}
+void eeconfig_debug_led_matrix(void) {
+  dprintf("led_matrix_config eprom\n");
+  dprintf("led_matrix_config.enable = %d\n", led_matrix_config.enable);
+  dprintf("led_matrix_config.mode = %d\n", led_matrix_config.mode);
+  dprintf("led_matrix_config.val = %d\n", led_matrix_config.val);
+  dprintf("led_matrix_config.speed = %d\n", led_matrix_config.speed);
+}
+
+// Last led hit
+#define LED_HITS_TO_REMEMBER 8
+uint8_t g_last_led_hit[LED_HITS_TO_REMEMBER] = {255};
+uint8_t g_last_led_count = 0;
+
+void map_row_column_to_led(uint8_t row, uint8_t column, uint8_t *led_i, uint8_t *led_count) {
+    led_matrix led;
+    *led_count = 0;
+
+    for (uint8_t i = 0; i < DRIVER_LED_TOTAL; i++) {
+        // map_index_to_led(i, &led);
+        led = g_leds[i];
+        if (row == led.matrix_co.row && column == led.matrix_co.col) {
+            led_i[*led_count] = i;
+            (*led_count)++;
+        }
+    }
+}
+
+void led_matrix_update_pwm_buffers(void) {
+    led_matrix_driver.flush();
+}
+
+void led_matrix_set_index_value(int index, uint8_t value) {
+    led_matrix_driver.set_value(index, value);
+}
+
+void led_matrix_set_index_value_all(uint8_t value) {
+    led_matrix_driver.set_value_all(value);
+}
+
+bool process_led_matrix(uint16_t keycode, keyrecord_t *record) {
+    if (record->event.pressed) {
+        uint8_t led[8], led_count;
+        map_row_column_to_led(record->event.key.row, record->event.key.col, led, &led_count);
+        if (led_count > 0) {
+            for (uint8_t i = LED_HITS_TO_REMEMBER; i > 1; i--) {
+                g_last_led_hit[i - 1] = g_last_led_hit[i - 2];
+            }
+            g_last_led_hit[0] = led[0];
+            g_last_led_count = MIN(LED_HITS_TO_REMEMBER, g_last_led_count + 1);
+        }
+        for(uint8_t i = 0; i < led_count; i++)
+            g_key_hit[led[i]] = 0;
+        g_any_key_hit = 0;
+    } else {
+        #ifdef LED_MATRIX_KEYRELEASES
+        uint8_t led[8], led_count;
+        map_row_column_to_led(record->event.key.row, record->event.key.col, led, &led_count);
+        for(uint8_t i = 0; i < led_count; i++)
+            g_key_hit[led[i]] = 255;
+
+        g_any_key_hit = 255;
+        #endif
+    }
+    return true;
+}
+
+void led_matrix_set_suspend_state(bool state) {
+    g_suspend_state = state;
+}
+
+// All LEDs off
+void led_matrix_all_off(void) {
+    led_matrix_set_index_value_all(0);
+}
+
+// Uniform brightness
+void led_matrix_uniform_brightness(void) {
+    led_matrix_set_index_value_all(led_matrix_config.val);
+}
+
+void led_matrix_custom(void) {}
+
+void led_matrix_task(void) {
+  #ifdef TRACK_PREVIOUS_EFFECT
+      static uint8_t toggle_enable_last = 255;
+  #endif
+        if (!led_matrix_config.enable) {
+     led_matrix_all_off();
+     led_matrix_indicators();
+     #ifdef TRACK_PREVIOUS_EFFECT
+         toggle_enable_last = led_matrix_config.enable;
+     #endif
+     return;
+    }
+
+    // delay 1 second before driving LEDs or doing anything else
+    // FIXME: Can't we use wait_ms() here?
+    static uint8_t startup_tick = 0;
+    if (startup_tick < 20) {
+        startup_tick++;
+        return;
+    }
+
+    g_tick++;
+
+    if (g_any_key_hit < 0xFFFFFFFF) {
+        g_any_key_hit++;
+    }
+
+    for (int led = 0; led < DRIVER_LED_TOTAL; led++) {
+        if (g_key_hit[led] < 255) {
+            if (g_key_hit[led] == 254)
+                g_last_led_count = MAX(g_last_led_count - 1, 0);
+            g_key_hit[led]++;
+        }
+    }
+
+    // Factory default magic value
+    if (led_matrix_config.mode == 255) {
+        led_matrix_uniform_brightness();
+        return;
+    }
+
+    // Ideally we would also stop sending zeros to the LED driver PWM buffers
+    // while suspended and just do a software shutdown. This is a cheap hack for now.
+    bool suspend_backlight = ((g_suspend_state && LED_DISABLE_WHEN_USB_SUSPENDED) ||
+            (LED_DISABLE_AFTER_TIMEOUT > 0 && g_any_key_hit > LED_DISABLE_AFTER_TIMEOUT * 60 * 20));
+    uint8_t effect = suspend_backlight ? 0 : led_matrix_config.mode;
+
+    #ifdef TRACK_PREVIOUS_EFFECT
+        // Keep track of the effect used last time,
+        // detect change in effect, so each effect can
+        // have an optional initialization.
+
+        static uint8_t effect_last = 255;
+        bool initialize = (effect != effect_last) || (led_matrix_config.enable != toggle_enable_last);
+        effect_last = effect;
+        toggle_enable_last = led_matrix_config.enable;
+    #endif
+
+    // this gets ticked at 20 Hz.
+    // each effect can opt to do calculations
+    // and/or request PWM buffer updates.
+    switch (effect) {
+        case LED_MATRIX_UNIFORM_BRIGHTNESS:
+            led_matrix_uniform_brightness();
+            break;
+        default:
+            led_matrix_custom();
+            break;
+    }
+
+    if (! suspend_backlight) {
+        led_matrix_indicators();
+    }
+
+}
+
+void led_matrix_indicators(void) {
+    led_matrix_indicators_kb();
+    led_matrix_indicators_user();
+}
+
+__attribute__((weak))
+void led_matrix_indicators_kb(void) {}
+
+__attribute__((weak))
+void led_matrix_indicators_user(void) {}
+
+
+// void led_matrix_set_indicator_index(uint8_t *index, uint8_t row, uint8_t column)
+// {
+//  if (row >= MATRIX_ROWS)
+//  {
+//      // Special value, 255=none, 254=all
+//      *index = row;
+//  }
+//  else
+//  {
+//      // This needs updated to something like
+//      // uint8_t led[8], led_count;
+//      // map_row_column_to_led(row,column,led,&led_count);
+//      // for(uint8_t i = 0; i < led_count; i++)
+//      map_row_column_to_led(row, column, index);
+//  }
+// }
+
+void led_matrix_init(void) {
+  led_matrix_driver.init();
+
+  // TODO: put the 1 second startup delay here?
+
+  // clear the key hits
+  for (int led=0; led<DRIVER_LED_TOTAL; led++) {
+      g_key_hit[led] = 255;
+  }
+
+
+  if (!eeconfig_is_enabled()) {
+      dprintf("led_matrix_init_drivers eeconfig is not enabled.\n");
+      eeconfig_init();
+      eeconfig_update_led_matrix_default();
+  }
+  led_matrix_config.raw = eeconfig_read_led_matrix();
+  if (!led_matrix_config.mode) {
+      dprintf("led_matrix_init_drivers led_matrix_config.mode = 0. Write default values to EEPROM.\n");
+      eeconfig_update_led_matrix_default();
+      led_matrix_config.raw = eeconfig_read_led_matrix();
+  }
+  eeconfig_debug_led_matrix(); // display current eeprom values
+}
+
+// Deals with the messy details of incrementing an integer
+static uint8_t increment(uint8_t value, uint8_t step, uint8_t min, uint8_t max) {
+    int16_t new_value = value;
+    new_value += step;
+    return MIN(MAX( new_value, min), max );
+}
+
+static uint8_t decrement(uint8_t value, uint8_t step, uint8_t min, uint8_t max) {
+    int16_t new_value = value;
+    new_value -= step;
+    return MIN(MAX( new_value, min), max );
+}
+
+// void *backlight_get_custom_key_value_eeprom_address(uint8_t led) {
+//     // 3 bytes per value
+//     return EECONFIG_LED_MATRIX + (led * 3);
+// }
+
+// void backlight_get_key_value(uint8_t led, uint8_t *value) {
+//     void *address = backlight_get_custom_key_value_eeprom_address(led);
+//     value = eeprom_read_byte(address);
+// }
+
+// void backlight_set_key_value(uint8_t row, uint8_t column, uint8_t value) {
+//     uint8_t led[8], led_count;
+//     map_row_column_to_led(row,column,led,&led_count);
+//     for(uint8_t i = 0; i < led_count; i++) {
+//         if (led[i] < DRIVER_LED_TOTAL) {
+//             void *address = backlight_get_custom_key_value_eeprom_address(led[i]);
+//             eeprom_update_byte(address, value);
+//         }
+//     }
+// }
+
+uint32_t led_matrix_get_tick(void) {
+    return g_tick;
+}
+
+void led_matrix_toggle(void) {
+        led_matrix_config.enable ^= 1;
+    eeconfig_update_led_matrix(led_matrix_config.raw);
+}
+
+void led_matrix_enable(void) {
+        led_matrix_config.enable = 1;
+    eeconfig_update_led_matrix(led_matrix_config.raw);
+}
+
+void led_matrix_enable_noeeprom(void) {
+        led_matrix_config.enable = 1;
+}
+
+void led_matrix_disable(void) {
+        led_matrix_config.enable = 0;
+    eeconfig_update_led_matrix(led_matrix_config.raw);
+}
+
+void led_matrix_disable_noeeprom(void) {
+        led_matrix_config.enable = 0;
+}
+
+void led_matrix_step(void) {
+    led_matrix_config.mode++;
+    if (led_matrix_config.mode >= LED_MATRIX_EFFECT_MAX)
+        led_matrix_config.mode = 1;
+    eeconfig_update_led_matrix(led_matrix_config.raw);
+}
+
+void led_matrix_step_reverse(void) {
+    led_matrix_config.mode--;
+    if (led_matrix_config.mode < 1)
+        led_matrix_config.mode = LED_MATRIX_EFFECT_MAX - 1;
+    eeconfig_update_led_matrix(led_matrix_config.raw);
+}
+
+void led_matrix_increase_val(void) {
+    led_matrix_config.val = increment(led_matrix_config.val, 8, 0, LED_MATRIX_MAXIMUM_BRIGHTNESS);
+    eeconfig_update_led_matrix(led_matrix_config.raw);
+}
+
+void led_matrix_decrease_val(void) {
+    led_matrix_config.val = decrement(led_matrix_config.val, 8, 0, LED_MATRIX_MAXIMUM_BRIGHTNESS);
+    eeconfig_update_led_matrix(led_matrix_config.raw);
+}
+
+void led_matrix_increase_speed(void) {
+    led_matrix_config.speed = increment(led_matrix_config.speed, 1, 0, 3);
+    eeconfig_update_led_matrix(led_matrix_config.raw);//EECONFIG needs to be increased to support this
+}
+
+void led_matrix_decrease_speed(void) {
+    led_matrix_config.speed = decrement(led_matrix_config.speed, 1, 0, 3);
+    eeconfig_update_led_matrix(led_matrix_config.raw);//EECONFIG needs to be increased to support this
+}
+
+void led_matrix_mode(uint8_t mode, bool eeprom_write) {
+    led_matrix_config.mode = mode;
+    if (eeprom_write) {
+        eeconfig_update_led_matrix(led_matrix_config.raw);
+    }
+}
+
+uint8_t led_matrix_get_mode(void) {
+    return led_matrix_config.mode;
+}
+
+void led_matrix_set_value(uint8_t val, bool eeprom_write) {
+    led_matrix_config.val = val;
+    if (eeprom_write) {
+      eeconfig_update_led_matrix(led_matrix_config.raw);
+    }
+}
diff --git a/quantum/led_matrix.h b/quantum/led_matrix.h
new file mode 100644
index 000000000..20f2e73c6
--- /dev/null
+++ b/quantum/led_matrix.h
@@ -0,0 +1,142 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2017 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2019 Clueboard
+ *
+ * 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/>.
+ */
+
+#ifndef LED_MATRIX_H
+#define LED_MATRIX_H
+
+
+typedef struct Point {
+        uint8_t x;
+        uint8_t y;
+} __attribute__((packed)) Point;
+
+typedef struct led_matrix {
+        union {
+                uint8_t raw;
+                struct {
+                        uint8_t row:4; // 16 max
+                        uint8_t col:4; // 16 max
+                };
+        } matrix_co;
+        Point point;
+        uint8_t modifier:1;
+} __attribute__((packed)) led_matrix;
+
+extern const led_matrix g_leds[DRIVER_LED_TOTAL];
+
+typedef struct {
+        uint8_t index;
+        uint8_t value;
+} led_indicator;
+
+typedef union {
+  uint32_t raw;
+  struct {
+    bool     enable  :1;
+    uint8_t  mode    :6;
+    uint8_t  hue     :8; // Unused by led_matrix
+    uint8_t  sat     :8; // Unused by led_matrix
+    uint8_t  val     :8;
+    uint8_t  speed   :8;//EECONFIG needs to be increased to support this
+  };
+} led_config_t;
+
+enum led_matrix_effects {
+          LED_MATRIX_UNIFORM_BRIGHTNESS = 1,
+          // All new effects go above this line
+    LED_MATRIX_EFFECT_MAX
+};
+
+void led_matrix_set_index_value(int index, uint8_t value);
+void led_matrix_set_index_value_all(uint8_t value);
+
+// This runs after another backlight effect and replaces
+// colors already set
+void led_matrix_indicators(void);
+void led_matrix_indicators_kb(void);
+void led_matrix_indicators_user(void);
+
+void led_matrix_init(void);
+void led_matrix_setup_drivers(void);
+
+void led_matrix_set_suspend_state(bool state);
+void led_matrix_set_indicator_state(uint8_t state);
+
+void led_matrix_task(void);
+
+// This should not be called from an interrupt
+// (eg. from a timer interrupt).
+// Call this while idle (in between matrix scans).
+// If the buffer is dirty, it will update the driver with the buffer.
+void led_matrix_update_pwm_buffers(void);
+
+bool process_led_matrix(uint16_t keycode, keyrecord_t *record);
+
+uint32_t led_matrix_get_tick(void);
+
+void led_matrix_toggle(void);
+void led_matrix_enable(void);
+void led_matrix_enable_noeeprom(void);
+void led_matrix_disable(void);
+void led_matrix_disable_noeeprom(void);
+void led_matrix_step(void);
+void led_matrix_step_reverse(void);
+void led_matrix_increase_val(void);
+void led_matrix_decrease_val(void);
+void led_matrix_increase_speed(void);
+void led_matrix_decrease_speed(void);
+void led_matrix_mode(uint8_t mode, bool eeprom_write);
+void led_matrix_mode_noeeprom(uint8_t mode);
+uint8_t led_matrix_get_mode(void);
+void led_matrix_set_value(uint8_t mode, bool eeprom_write);
+
+#ifndef BACKLIGHT_ENABLE
+#define backlight_toggle() backlight_matrix_toggle()
+#define backlight_enable() backlight_matrix_enable()
+#define backlight_enable_noeeprom() backlight_matrix_enable_noeeprom()
+#define backlight_disable() backlight_matrix_disable()
+#define backlight_disable_noeeprom() backlight_matrix_disable_noeeprom()
+#define backlight_step() backlight_matrix_step()
+#define backlight_set_value(val) backlight_matrix_set_value(val)
+#define backlight_set_value_noeeprom(val) backlight_matrix_set_value_noeeprom(val)
+#define backlight_step_reverse() backlight_matrix_step_reverse()
+#define backlight_increase_val() backlight_matrix_increase_val()
+#define backlight_decrease_val() backlight_matrix_decrease_val()
+#define backlight_increase_speed() backlight_matrix_increase_speed()
+#define backlight_decrease_speed() backlight_matrix_decrease_speed()
+#define backlight_mode(mode) backlight_matrix_mode(mode)
+#define backlight_mode_noeeprom(mode) backlight_matrix_mode_noeeprom(mode)
+#define backlight_get_mode() backlight_matrix_get_mode()
+#endif
+
+typedef struct {
+    /* Perform any initialisation required for the other driver functions to work. */
+    void (*init)(void);
+
+    /* Set the brightness of a single LED in the buffer. */
+    void (*set_value)(int index, uint8_t value);
+    /* Set the brightness of all LEDS on the keyboard in the buffer. */
+    void (*set_value_all)(uint8_t value);
+    /* Flush any buffered changes to the hardware. */
+    void (*flush)(void);
+} led_matrix_driver_t;
+
+extern const led_matrix_driver_t led_matrix_driver;
+
+#endif
diff --git a/quantum/led_matrix_drivers.c b/quantum/led_matrix_drivers.c
new file mode 100644
index 000000000..f00f4f366
--- /dev/null
+++ b/quantum/led_matrix_drivers.c
@@ -0,0 +1,147 @@
+/* Copyright 2018 Clueboard
+ *
+ * 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 <stdint.h>
+#include <stdbool.h>
+#include "quantum.h"
+#include "led_matrix.h"
+
+/* Each driver needs to define a struct:
+ *
+ *    const led_matrix_driver_t led_matrix_driver;
+ *
+ * All members must be provided. Keyboard custom drivers must define this
+ * in their own files.
+ */
+
+#if defined(IS31FL3731) || defined(IS31FL3733)
+
+#if defined(IS31FL3731)
+    #include "is31fl3731-simple.h"
+#endif
+
+#include "i2c_master.h"
+
+static void init(void) {
+    i2c_init();
+    #ifdef IS31FL3731
+        #ifdef LED_DRIVER_ADDR_1
+            IS31FL3731_init(DRIVER_ADDR_1);
+        #endif
+        #ifdef LED_DRIVER_ADDR_2
+            IS31FL3731_init(DRIVER_ADDR_2);
+        #endif
+        #ifdef LED_DRIVER_ADDR_3
+            IS31FL3731_init(DRIVER_ADDR_3);
+        #endif
+        #ifdef LED_DRIVER_ADDR_4
+            IS31FL3731_init(DRIVER_ADDR_4);
+        #endif
+    #else
+        #ifdef LED_DRIVER_ADDR_1
+            IS31FL3733_init(DRIVER_ADDR_1);
+        #endif
+        #ifdef LED_DRIVER_ADDR_2
+            IS31FL3733_init(DRIVER_ADDR_2);
+        #endif
+        #ifdef LED_DRIVER_ADDR_3
+            IS31FL3733_init(DRIVER_ADDR_3);
+        #endif
+        #ifdef LED_DRIVER_ADDR_4
+            IS31FL3733_init(DRIVER_ADDR_4);
+        #endif
+    #endif
+    for (int index = 0; index < DRIVER_LED_TOTAL; index++) {
+        #ifdef IS31FL3731
+            IS31FL3731_set_led_control_register(index, true);
+        #else
+            IS31FL3733_set_led_control_register(index, true);
+        #endif
+    }
+    // This actually updates the LED drivers
+    #ifdef IS31FL3731
+        #ifdef LED_DRIVER_ADDR_1
+            IS31FL3731_update_led_control_registers(DRIVER_ADDR_1);
+        #endif
+        #ifdef LED_DRIVER_ADDR_2
+            IS31FL3731_update_led_control_registers(DRIVER_ADDR_2);
+        #endif
+        #ifdef LED_DRIVER_ADDR_3
+            IS31FL3731_update_led_control_registers(DRIVER_ADDR_3);
+        #endif
+        #ifdef LED_DRIVER_ADDR_4
+            IS31FL3731_update_led_control_registers(DRIVER_ADDR_4);
+        #endif
+    #else
+        #ifdef LED_DRIVER_ADDR_1
+            IS31FL3733_update_led_control_registers(DRIVER_ADDR_1);
+        #endif
+        #ifdef LED_DRIVER_ADDR_2
+            IS31FL3733_update_led_control_registers(DRIVER_ADDR_2);
+        #endif
+        #ifdef LED_DRIVER_ADDR_3
+            IS31FL3733_update_led_control_registers(DRIVER_ADDR_3);
+        #endif
+        #ifdef LED_DRIVER_ADDR_4
+            IS31FL3733_update_led_control_registers(DRIVER_ADDR_4);
+        #endif
+    #endif
+}
+
+static void flush(void) {
+    #ifdef IS31FL3731
+        #ifdef LED_DRIVER_ADDR_1
+            IS31FL3731_update_pwm_buffers(DRIVER_ADDR_1);
+        #endif
+        #ifdef LED_DRIVER_ADDR_2
+            IS31FL3731_update_pwm_buffers(DRIVER_ADDR_2);
+        #endif
+        #ifdef LED_DRIVER_ADDR_3
+            IS31FL3731_update_pwm_buffers(DRIVER_ADDR_3);
+        #endif
+        #ifdef LED_DRIVER_ADDR_4
+            IS31FL3731_update_pwm_buffers(DRIVER_ADDR_4);
+        #endif
+    #else
+        #ifdef LED_DRIVER_ADDR_1
+            IS31FL3733_update_pwm_buffers(DRIVER_ADDR_1);
+        #endif
+        #ifdef LED_DRIVER_ADDR_2
+            IS31FL3733_update_pwm_buffers(DRIVER_ADDR_2);
+        #endif
+        #ifdef LED_DRIVER_ADDR_3
+            IS31FL3733_update_pwm_buffers(DRIVER_ADDR_3);
+        #endif
+        #ifdef LED_DRIVER_ADDR_4
+            IS31FL3733_update_pwm_buffers(DRIVER_ADDR_4);
+        #endif
+    #endif
+}
+
+const led_matrix_driver_t led_matrix_driver = {
+    .init = init,
+    .flush = flush,
+#ifdef IS31FL3731
+    .set_value = IS31FL3731_set_value,
+    .set_value_all = IS31FL3731_set_value_all,
+#else
+    .set_value = IS31FL3733_set_value,
+    .set_value_all = IS31FL3733_set_value_all,
+#endif
+};
+
+
+#endif
diff --git a/quantum/rgb_matrix.h b/quantum/rgb_matrix.h
index e43532d11..b64ddec07 100644
--- a/quantum/rgb_matrix.h
+++ b/quantum/rgb_matrix.h
@@ -50,25 +50,17 @@ typedef struct rgb_led {
 
 extern const rgb_led g_rgb_leds[DRIVER_LED_TOTAL];
 
-typedef struct
-{
-        HSV color;
-        uint8_t index;
-} rgb_indicator;
-
 typedef union {
   uint32_t raw;
   struct {
     bool     enable  :1;
     uint8_t  mode    :6;
-    uint16_t hue     :9;
-    uint8_t  sat     :8;
     uint8_t  val     :8;
     uint8_t  speed   :8;//EECONFIG needs to be increased to support this
   };
-} rgb_config_t;
+} led_config_t;
 
-enum rgb_matrix_effects {
+enum _matrix_effects {
         RGB_MATRIX_SOLID_COLOR = 1,
 #ifndef DISABLE_RGB_MATRIX_ALPHAS_MODS
     RGB_MATRIX_ALPHAS_MODS,