Add RGB matrix & LED Matrix support for IS31FL3742A, IS31FL3743A, IS31FL3745, IS31FL3746A (#14989)

Co-authored-by: Xelus22 <17491233+Xelus22@users.noreply.github.com>

13 files changed, 1779 insertions, 4 deletions

diff --git a/common_features.mk b/common_features.mk
index 07e26a9446..7ff19e8084 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -255,7 +255,7 @@ ifeq ($(strip $(RGBLIGHT_ENABLE)), yes)
 endif
 
 LED_MATRIX_ENABLE ?= no
-VALID_LED_MATRIX_TYPES := IS31FL3731 custom
+VALID_LED_MATRIX_TYPES := IS31FL3731 IS31FL3742A IS31FL3743A IS31FL3745 IS31FL3746A custom
 # TODO: IS31FL3733 IS31FL3737 IS31FL3741
 
 ifeq ($(strip $(LED_MATRIX_ENABLE)), yes)
@@ -282,11 +282,40 @@ endif
         SRC += is31fl3731-simple.c
         QUANTUM_LIB_SRC += i2c_master.c
     endif
+
+	ifeq ($(strip $(LED_MATRIX_DRIVER)), IS31FL3742A)
+        OPT_DEFS += -DIS31FLCOMMON -DIS31FL3742A -DSTM32_I2C -DHAL_USE_I2C=TRUE
+        COMMON_VPATH += $(DRIVER_PATH)/led/issi
+        SRC += is31flcommon.c
+        QUANTUM_LIB_SRC += i2c_master.c
+    endif
+
+	ifeq ($(strip $(LED_MATRIX_DRIVER)), IS31FL3743A)
+        OPT_DEFS += -DIS31FLCOMMON -DIS31FL3743A -DSTM32_I2C -DHAL_USE_I2C=TRUE
+        COMMON_VPATH += $(DRIVER_PATH)/led/issi
+        SRC += is31flcommon.c
+        QUANTUM_LIB_SRC += i2c_master.c
+    endif
+
+	ifeq ($(strip $(LED_MATRIX_DRIVER)), IS31FL3745)
+        OPT_DEFS += -DIS31FLCOMMON -DIS31FL3745 -DSTM32_I2C -DHAL_USE_I2C=TRUE
+        COMMON_VPATH += $(DRIVER_PATH)/led/issi
+        SRC += is31flcommon.c
+        QUANTUM_LIB_SRC += i2c_master.c
+    endif
+
+	ifeq ($(strip $(LED_MATRIX_DRIVER)), IS31FL3746A)
+        OPT_DEFS += -DIS31FLCOMMON -DIS31FL3746A -DSTM32_I2C -DHAL_USE_I2C=TRUE
+        COMMON_VPATH += $(DRIVER_PATH)/led/issi
+        SRC += is31flcommon.c
+        QUANTUM_LIB_SRC += i2c_master.c
+    endif
+
 endif
 
 RGB_MATRIX_ENABLE ?= no
-VALID_RGB_MATRIX_TYPES := AW20216 IS31FL3731 IS31FL3733 IS31FL3737 IS31FL3741 CKLED2001 WS2812 custom
 
+VALID_RGB_MATRIX_TYPES := AW20216 IS31FL3731 IS31FL3733 IS31FL3737 IS31FL3741 IS31FL3742A IS31FL3743A IS31FL3745 IS31FL3746A CKLED2001 WS2812 custom
 ifeq ($(strip $(RGB_MATRIX_ENABLE)), yes)
     ifeq ($(filter $(RGB_MATRIX_DRIVER),$(VALID_RGB_MATRIX_TYPES)),)
         $(call CATASTROPHIC_ERROR,Invalid RGB_MATRIX_DRIVER,RGB_MATRIX_DRIVER="$(RGB_MATRIX_DRIVER)" is not a valid matrix type)
@@ -341,6 +370,34 @@ endif
         QUANTUM_LIB_SRC += i2c_master.c
     endif
 
+	ifeq ($(strip $(RGB_MATRIX_DRIVER)), IS31FL3742A)
+        OPT_DEFS += -DIS31FLCOMMON -DIS31FL3742A -DSTM32_I2C -DHAL_USE_I2C=TRUE
+        COMMON_VPATH += $(DRIVER_PATH)/led/issi
+        SRC += is31flcommon.c
+        QUANTUM_LIB_SRC += i2c_master.c
+    endif
+
+	ifeq ($(strip $(RGB_MATRIX_DRIVER)), IS31FL3743A)
+        OPT_DEFS += -DIS31FLCOMMON -DIS31FL3743A -DSTM32_I2C -DHAL_USE_I2C=TRUE
+        COMMON_VPATH += $(DRIVER_PATH)/led/issi
+        SRC += is31flcommon.c
+        QUANTUM_LIB_SRC += i2c_master.c
+    endif
+
+	ifeq ($(strip $(RGB_MATRIX_DRIVER)), IS31FL3745)
+        OPT_DEFS += -DIS31FLCOMMON -DIS31FL3745 -DSTM32_I2C -DHAL_USE_I2C=TRUE
+        COMMON_VPATH += $(DRIVER_PATH)/led/issi
+        SRC += is31flcommon.c
+        QUANTUM_LIB_SRC += i2c_master.c
+    endif
+
+	ifeq ($(strip $(RGB_MATRIX_DRIVER)), IS31FL3746A)
+        OPT_DEFS += -DIS31FLCOMMON -DIS31FL3746A -DSTM32_I2C -DHAL_USE_I2C=TRUE
+        COMMON_VPATH += $(DRIVER_PATH)/led/issi
+        SRC += is31flcommon.c
+        QUANTUM_LIB_SRC += i2c_master.c
+    endif
+
     ifeq ($(strip $(RGB_MATRIX_DRIVER)), CKLED2001)
         OPT_DEFS += -DCKLED2001 -DSTM32_I2C -DHAL_USE_I2C=TRUE
         COMMON_VPATH += $(DRIVER_PATH)/led
diff --git a/docs/feature_led_matrix.md b/docs/feature_led_matrix.md
index 37f38cc6ed..37c74843aa 100644
--- a/docs/feature_led_matrix.md
+++ b/docs/feature_led_matrix.md
@@ -68,6 +68,109 @@ const is31_led PROGMEM 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/led/issi/is31fl3731-simple.h`. The `driver` is the index of the driver you defined in your `config.h` (`0`, `1`, `2`, or `3` ).
 
 ---
+### IS31FLCOMMON :id=is31flcommon
+
+There is basic support for addressable LED matrix lighting with a selection of I2C ISSI Lumissil LED controllers through a shared common driver. To enable it, add this to your `rules.mk`:
+
+```makefile
+LED_MATRIX_ENABLE = yes
+LED_MATRIX_DRIVER = <driver name>
+```
+
+Where `<driver name>` is the applicable LED driver chip as below
+
+| Driver Name | Data Sheet | Capability |
+|-------------|------------|------------|
+| `IS31FL3742A` | [datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3742A_DS.pdf) | 180 LED, 30x6 Matrix |
+| `ISSIFL3743A` | [datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3743A_DS.pdf) | 198 LED, 18x11 Matrix |
+| `IS31FL3745` | [datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3745_DS.pdf) | 144 LED, 18x8 Matrix |
+| `IS31FL3746A` | [datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3746A_DS.pdf) | 72 LED, 18x4 Matrix |
+
+You can use between 1 and 4 IC's. Do not specify `DRIVER_ADDR_<N>` define for IC's if not present on your keyboard. The `DRIVER_ADDR_1` default assumes that all Address pins on the controller have been connected to GND. Drivers that have SYNC functionality have the default settings to disable if 1 driver. If more than 1 drivers then `DRIVER_ADDR_1` will be set to Master and the remaiing ones set to Slave.
+
+Configure the hardware via your `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 LED driver IC's are present | |
+| `DRIVER_LED_TOTAL` | (Required) How many LED lights are present across all drivers | |
+| `DRIVER_ADDR_1` | (Optional) Address for the first LED driver | |
+| `DRIVER_ADDR_<N>` | (Required) Address for the additional LED drivers | |
+| `ISSI_SSR_<N>` | (Optional) Configuration for the Spread Spectrum Register | |
+| `ISSI_CONFIGURATION` | (Optional) Configuration for the Configuration Register | |
+| `ISSI_GLOBALCURRENT` | (Optional) Configuration for the Global Current Register | 0xFF |
+| `ISSI_PULLDOWNUP` | (Optional) Configuration for the Pull Up & Pull Down Register | |
+| `ISSI_TEMP` | (Optional) Configuration for the Tempature Register | |
+| `ISSI_PWM_ENABLE` | (Optional) Configuration for the PWM Enable Register | |
+| `ISSI_PWM_SET` | (Optional) Configuration for the PWM Setting Register | |
+| `ISSI_SCAL_LED ` | (Optional) Configuration for the LEDs Scaling Registers | 0xFF |
+| `ISSI_MANUAL_SCALING` | (Optional) If you wish to configure the Scaling Registers manually | |
+
+
+Defaults
+
+| Variable | IS31FL3742A | IS31FL3743A | IS31FL3745 | IS31FL3746 |
+|----------|-------------|-------------|------------|------------|
+| `DRIVER_ADDR_1` | 0b0110000 | 0b0100000 | 0b0100000 | 0b1100000 |
+| `ISSI_SSR_1` | 0x00 | 0x00 / 0x60 | 0x00 / 0xC0 | 0x00 |
+| `ISSI_SSR_<2-4>` | 0x00 | 0x40 | 0x80 | 0x00 |
+| `ISSI_CONFIGURATION` | 0x31 | 0x01 | 0x31 | 0x01 |
+| `ISSI_PULLDOWNUP` | 0x55 | 0x33 | 0x33 | 0x33 |
+| `ISSI_TEMP` | N/A | 0x00 | 0x00 | 0x00 |
+| `ISSI_PWM_ENABLE` | N/A | N/A | N/A | 0x00 |
+| `ISSI_PWM_SET` | 0x00 | N/A | N/A | 0x00 |
+
+Here is an example using 2 drivers.
+
+```c
+#define DRIVER_ADDR_2 0b0100001
+
+#define DRIVER_COUNT 2
+#define DRIVER_1_LED_TOTAL 66
+#define DRIVER_2_LED_TOTAL 42
+#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 for more. Note that using a combination of different drivers is not supported. All drivers must be of the same model.
+
+Define these arrays listing all the LEDs in your `<keyboard>.c`:
+
+```c
+const is31_led __flash g_is31_leds[DRIVER_LED_TOTAL] = {
+/* Refer to IS31 manual for these locations
+ *    driver
+ *    |  LED address
+ *    |  | */
+    { 0, CS1_SW1 },
+    { 0, CS2_SW1 },
+    // ...
+}
+```
+
+Where `CSx_SWx` is the location of the LED in the matrix defined by the datasheet. The `driver` is the index of the driver you defined in your `config.h` (`0`, `1`, `2`, or `3` for now).
+
+`ISSI_MANUAL_SCALING` is used to override the Scaling for individual LED's. By default they will be set as per `ISSI_SCAL_LED`. In `config.h` set how many LED's you want to manually set scaling for.
+Eg `#define ISSI_MANUAL_SCALING 3`
+
+Then Define the array listing all the LEDs you want to override in your `<keyboard>.c`:
+
+```c
+const is31_led __flash g_is31_scaling[ISSI_MANUAL_SCALING] = {
+ *   LED Index
+ *   |  Scaling
+ *   |  | */
+    {5, 120},
+    {9, 120},
+    ....
+}
+```
+
+Where LED Index is the position of the LED in the `g_is31_leds` array. The `scaling` value between 0 and 255 to be written to the Scaling Register.
+
+---
 
 ## Common Configuration :id=common-configuration
 
diff --git a/docs/feature_rgb_matrix.md b/docs/feature_rgb_matrix.md
index 831df3d442..a021779d43 100644
--- a/docs/feature_rgb_matrix.md
+++ b/docs/feature_rgb_matrix.md
@@ -233,6 +233,115 @@ const is31_led PROGMEM 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/31FL3737.pdf) and the header file `drivers/led/issi/is31fl3737.h`. The `driver` is the index of the driver you defined in your `config.h` (Only `0`, `1` for now).
 
 ---
+### IS31FLCOMMON :id=is31flcommon
+
+There is basic support for addressable RGB matrix lighting with a selection of I2C ISSI Lumissil RGB controllers through a shared common driver. To enable it, add this to your `rules.mk`:
+
+```makefile
+RGB_MATRIX_ENABLE = yes
+RGB_MATRIX_DRIVER = <driver name>
+```
+
+Where `<driver name>` is the applicable LED driver chip as below
+
+| Driver Name | Data Sheet | Capability |
+|-------------|------------|------------|
+| `IS31FL3742A` | [datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3742A_DS.pdf) | 60 RGB, 30x6 Matrix |
+| `ISSIFL3743A` | [datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3743A_DS.pdf) | 66 RGB, 18x11 Matrix |
+| `IS31FL3745` | [datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3745_DS.pdf) | 48 RGB, 18x8 Matrix |
+| `IS31FL3746A` | [datasheet](https://www.lumissil.com/assets/pdf/core/IS31FL3746A_DS.pdf) | 24 RGB, 18x4 Matrix |
+
+You can use between 1 and 4 IC's. Do not specify `DRIVER_ADDR_<N>` define for IC's if not present on your keyboard. The `DRIVER_ADDR_1` default assumes that all Address pins on the controller have been connected to GND. Drivers that have SYNC functionality have the default settings to disable if 1 driver. If more than 1 drivers then `DRIVER_ADDR_1` will be set to Master and the remaining ones set to Slave.
+
+Configure the hardware via your `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` | (Optional) Address for the first RGB driver | |
+| `DRIVER_ADDR_<N>` | (Required) Address for the additional RGB drivers | |
+| `ISSI_SSR_<N>` | (Optional) Configuration for the Spread Spectrum Register | |
+| `ISSI_CONFIGURATION` | (Optional) Configuration for the Configuration Register | |
+| `ISSI_GLOBALCURRENT` | (Optional) Configuration for the Global Current Register | 0xFF |
+| `ISSI_PULLDOWNUP` | (Optional) Configuration for the Pull Up & Pull Down Register | |
+| `ISSI_TEMP` | (Optional) Configuration for the Tempature Register | |
+| `ISSI_PWM_ENABLE` | (Optional) Configuration for the PWM Enable Register | |
+| `ISSI_PWM_SET` | (Optional) Configuration for the PWM Setting Register | |
+| `ISSI_SCAL_RED` | (Optional) Configuration for the RED LEDs in Scaling Registers | 0xFF |
+| `ISSI_SCAL_BLUE` | (Optional) Configuration for the BLUE LEDs in Scaling Registers | 0xFF |
+| `ISSI_SCAL_GREEN` | (Optional) Configuration for the GREEN LEDs in Scaling Registers | 0xFF |
+| `ISSI_MANUAL_SCALING` | (Optional) If you wish to configure the Scaling Registers manually | |
+
+
+Defaults
+
+| Variable | IS31FL3742A | IS31FL3743A | IS31FL3745 | IS31FL3746 |
+|----------|-------------|-------------|------------|------------|
+| `DRIVER_ADDR_1` | 0b0110000 | 0b0100000 | 0b0100000 | 0b1100000 |
+| `ISSI_SSR_1` | 0x00 | 0x00 / 0x60 | 0x00 / 0xC0 | 0x00 |
+| `ISSI_SSR_<2-4>` | 0x00 | 0x40 | 0x80 | 0x00 |
+| `ISSI_CONFIGURATION` | 0x31 | 0x01 | 0x31 | 0x01 |
+| `ISSI_PULLDOWNUP` | 0x55 | 0x33 | 0x33 | 0x33 |
+| `ISSI_TEMP` | N/A | 0x00 | 0x00 | 0x00 |
+| `ISSI_PWM_ENABLE` | N/A | N/A | N/A | 0x00 |
+| `ISSI_PWM_SET` | 0x00 | N/A | N/A | 0x00 |
+
+Here is an example using 2 drivers.
+
+```c
+#define DRIVER_ADDR_2 0b0100001
+
+#define DRIVER_COUNT 2
+#define DRIVER_1_LED_TOTAL 66
+#define DRIVER_2_LED_TOTAL 42
+#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 for more. Note that using a combination of different drivers is not supported. All drivers must be of the same model.
+
+Define these arrays listing all the LEDs in your `<keyboard>.c`:
+
+```c
+const is31_led __flash g_is31_leds[DRIVER_LED_TOTAL] = {
+/* Refer to IS31 manual for these locations
+ *   driver
+ *   |  R location
+ *   |  |        G location
+ *   |  |        |        B location
+ *   |  |        |        | */
+    {0, CS1_SW1, CS2_SW1, CS3_SW1},
+    ....
+}
+```
+
+Where `CSx_SWx` is the location of the LED in the matrix defined by the datasheet. The `driver` is the index of the driver you defined in your `config.h` (`0`, `1`, `2`, or `3` for now).
+
+`ISSI_MANUAL_SCALING` is used to override the Scaling for individual LED's. By default they will be set as per `ISSI_SCAL_<colour>`. In `config.h` set how many LED's you want to manually set scaling for.
+Eg `#define ISSI_MANUAL_SCALING 3`
+
+Then Define the array listing all the LEDs you want to override in your `<keyboard>.c`:
+
+```c
+const is31_led __flash g_is31_scaling[ISSI_MANUAL_SCALING] = {
+ *   LED Index
+ *   |  R scaling
+ *   |  |    G scaling
+ *   |  |    |    B scaling
+ *   |  |    |    | */
+    {5, 120, 155, 167},
+    {9, 120, 155, 167},
+    ....
+}
+```
+
+Where LED Index is the position of the LED in the `g_is31_leds` array. The `scaling` value between 0 and 255 to be written to the Scaling Register.
+
+---
 
 ### WS2812 :id=ws2812
 
diff --git a/drivers/led/issi/is31fl3742.h b/drivers/led/issi/is31fl3742.h
new file mode 100644
index 0000000000..c96f12d0f1
--- /dev/null
+++ b/drivers/led/issi/is31fl3742.h
@@ -0,0 +1,299 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ * Copyright 2021 MasterSpoon
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// 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
+// ADDR represents A1:A0 of the 7-bit address.
+// The result is: 0b01100(ADDR)
+#ifndef DRIVER_ADDR_1
+#    define DRIVER_ADDR_1 0b0110000
+#endif
+
+// Command Registers
+#define ISSI_COMMANDREGISTER_WRITELOCK 0xFE
+#define ISSI_COMMANDREGISTER 0xFD
+#define ISSI_IDREGISTER 0xFC
+#define ISSI_REGISTER_UNLOCK 0xC5
+
+// Response Registers
+#define ISSI_PAGE_PWM 0x00
+#define ISSI_PAGE_SCALING 0x02
+#define ISSI_PAGE_FUNCTION 0x04
+
+// Registers under Function Register
+#define ISSI_REG_CONFIGURATION 0x00
+#define ISSI_REG_GLOBALCURRENT 0x01
+#define ISSI_REG_PULLDOWNUP 0x02
+#define ISSI_REG_SSR 0x41
+#define ISSI_REG_RESET 0x3F
+#define ISSI_REG_PWM_SET 0x36
+
+// Set defaults for Function Registers
+#ifndef ISSI_CONFIGURATION
+#    define ISSI_CONFIGURATION 0x31
+#endif
+#ifndef ISSI_GLOBALCURRENT
+#    define ISSI_GLOBALCURRENT 0xFF
+#endif
+#ifndef ISSI_PULLDOWNUP
+#    define ISSI_PULLDOWNUP 0x55
+#endif
+#ifndef ISSI_PWM_SET
+#    define ISSI_PWM_SET 0x00
+#endif
+
+// Set defaults for Spread Spectrum Register
+#ifndef ISSI_SSR_1
+#    define ISSI_SSR_1 0x00
+#endif
+#ifndef ISSI_SSR_2
+#    define ISSI_SSR_2 0x00
+#endif
+#ifndef ISSI_SSR_3
+#    define ISSI_SSR_3 0x00
+#endif
+#ifndef ISSI_SSR_4
+#    define ISSI_SSR_4 0x00
+#endif
+
+// Set defaults for Scaling registers
+#ifndef ISSI_SCAL_RED
+#    define ISSI_SCAL_RED 0xFF
+#endif
+#ifndef ISSI_SCAL_BLUE
+#    define ISSI_SCAL_BLUE 0xFF
+#endif
+#ifndef ISSI_SCAL_GREEN
+#    define ISSI_SCAL_GREEN 0xFF
+#endif
+#define ISSI_SCAL_RED_OFF 0x00
+#define ISSI_SCAL_GREEN_OFF 0x00
+#define ISSI_SCAL_BLUE_OFF 0x00
+
+#ifndef ISSI_SCAL_LED
+#    define ISSI_SCAL_LED 0xFF
+#endif
+#define ISSI_SCAL_LED_OFF 0x00
+
+// Set buffer sizes
+#define ISSI_MAX_LEDS 180
+#define ISSI_SCALING_SIZE 180
+#define ISSI_PWM_TRF_SIZE 18
+#define ISSI_SCALING_TRF_SIZE 18
+
+// Location of 1st bit for PWM and Scaling registers
+#define ISSI_PWM_REG_1ST 0x00
+#define ISSI_SCL_REG_1ST 0x00
+
+// Map CS SW locations to order in PWM / Scaling buffers
+// This matches the ORDER in the Datasheet Register not the POSITION
+// It will always count from 0x00 to (ISSI_MAX_LEDS - 1)
+#define CS1_SW1 0x00
+#define CS2_SW1 0x01
+#define CS3_SW1 0x02
+#define CS4_SW1 0x03
+#define CS5_SW1 0x04
+#define CS6_SW1 0x05
+#define CS7_SW1 0x06
+#define CS8_SW1 0x07
+#define CS9_SW1 0x08
+#define CS10_SW1 0x09
+#define CS11_SW1 0x0A
+#define CS12_SW1 0x0B
+#define CS13_SW1 0x0C
+#define CS14_SW1 0x0D
+#define CS15_SW1 0x0E
+#define CS16_SW1 0x0F
+#define CS17_SW1 0x10
+#define CS18_SW1 0x11
+#define CS19_SW1 0x12
+#define CS20_SW1 0x13
+#define CS21_SW1 0x14
+#define CS22_SW1 0x15
+#define CS23_SW1 0x16
+#define CS24_SW1 0x17
+#define CS25_SW1 0x18
+#define CS26_SW1 0x19
+#define CS27_SW1 0x1A
+#define CS28_SW1 0x1B
+#define CS29_SW1 0x1C
+#define CS30_SW1 0x1D
+
+#define CS1_SW2 0x1E
+#define CS2_SW2 0x1F
+#define CS3_SW2 0x20
+#define CS4_SW2 0x21
+#define CS5_SW2 0x22
+#define CS6_SW2 0x23
+#define CS7_SW2 0x24
+#define CS8_SW2 0x25
+#define CS9_SW2 0x26
+#define CS10_SW2 0x27
+#define CS11_SW2 0x28
+#define CS12_SW2 0x29
+#define CS13_SW2 0x2A
+#define CS14_SW2 0x2B
+#define CS15_SW2 0x2C
+#define CS16_SW2 0x2D
+#define CS17_SW2 0x2E
+#define CS18_SW2 0x2F
+#define CS19_SW2 0x30
+#define CS20_SW2 0x31
+#define CS21_SW2 0x32
+#define CS22_SW2 0x33
+#define CS23_SW2 0x34
+#define CS24_SW2 0x35
+#define CS25_SW2 0x36
+#define CS26_SW2 0x37
+#define CS27_SW2 0x38
+#define CS28_SW2 0x39
+#define CS29_SW2 0x3A
+#define CS30_SW2 0x3B
+
+#define CS1_SW3 0x3C
+#define CS2_SW3 0x3D
+#define CS3_SW3 0x3E
+#define CS4_SW3 0x3F
+#define CS5_SW3 0x40
+#define CS6_SW3 0x41
+#define CS7_SW3 0x42
+#define CS8_SW3 0x43
+#define CS9_SW3 0x44
+#define CS10_SW3 0x45
+#define CS11_SW3 0x46
+#define CS12_SW3 0x47
+#define CS13_SW3 0x48
+#define CS14_SW3 0x49
+#define CS15_SW3 0x4A
+#define CS16_SW3 0x4B
+#define CS17_SW3 0x4C
+#define CS18_SW3 0x4D
+#define CS19_SW3 0x4E
+#define CS20_SW3 0x4F
+#define CS21_SW3 0x50
+#define CS22_SW3 0x51
+#define CS23_SW3 0x52
+#define CS24_SW3 0x53
+#define CS25_SW3 0x54
+#define CS26_SW3 0x55
+#define CS27_SW3 0x56
+#define CS28_SW3 0x57
+#define CS29_SW3 0x58
+#define CS30_SW3 0x59
+
+#define CS1_SW4 0x5A
+#define CS2_SW4 0x5B
+#define CS3_SW4 0x5C
+#define CS4_SW4 0x5D
+#define CS5_SW4 0x5E
+#define CS6_SW4 0x5F
+#define CS7_SW4 0x60
+#define CS8_SW4 0x61
+#define CS9_SW4 0x62
+#define CS10_SW4 0x63
+#define CS11_SW4 0x64
+#define CS12_SW4 0x65
+#define CS13_SW4 0x66
+#define CS14_SW4 0x67
+#define CS15_SW4 0x68
+#define CS16_SW4 0x69
+#define CS17_SW4 0x6A
+#define CS18_SW4 0x6B
+#define CS19_SW4 0x6C
+#define CS20_SW4 0x6D
+#define CS21_SW4 0x6E
+#define CS22_SW4 0x6F
+#define CS23_SW4 0x70
+#define CS24_SW4 0x71
+#define CS25_SW4 0x72
+#define CS26_SW4 0x73
+#define CS27_SW4 0x74
+#define CS28_SW4 0x75
+#define CS29_SW4 0x76
+#define CS30_SW4 0x77
+
+#define CS1_SW5 0x78
+#define CS2_SW5 0x79
+#define CS3_SW5 0x7A
+#define CS4_SW5 0x7B
+#define CS5_SW5 0x7C
+#define CS6_SW5 0x7D
+#define CS7_SW5 0x7E
+#define CS8_SW5 0x7F
+#define CS9_SW5 0x80
+#define CS10_SW5 0x81
+#define CS11_SW5 0x82
+#define CS12_SW5 0x83
+#define CS13_SW5 0x84
+#define CS14_SW5 0x85
+#define CS15_SW5 0x86
+#define CS16_SW5 0x87
+#define CS17_SW5 0x88
+#define CS18_SW5 0x89
+#define CS19_SW5 0x8A
+#define CS20_SW5 0x8B
+#define CS21_SW5 0x8C
+#define CS22_SW5 0x8D
+#define CS23_SW5 0x8E
+#define CS24_SW5 0x8F
+#define CS25_SW5 0x90
+#define CS26_SW5 0x91
+#define CS27_SW5 0x92
+#define CS28_SW5 0x93
+#define CS29_SW5 0x94
+#define CS30_SW5 0x95
+
+#define CS1_SW6 0x96
+#define CS2_SW6 0x97
+#define CS3_SW6 0x98
+#define CS4_SW6 0x99
+#define CS5_SW6 0x9A
+#define CS6_SW6 0x9B
+#define CS7_SW6 0x9C
+#define CS8_SW6 0x9D
+#define CS9_SW6 0x9E
+#define CS10_SW6 0x9F
+#define CS11_SW6 0xA0
+#define CS12_SW6 0xA1
+#define CS13_SW6 0xA2
+#define CS14_SW6 0xA3
+#define CS15_SW6 0xA4
+#define CS16_SW6 0xA5
+#define CS17_SW6 0xA6
+#define CS18_SW6 0xA7
+#define CS19_SW6 0xA8
+#define CS20_SW6 0xA9
+#define CS21_SW6 0xAA
+#define CS22_SW6 0xAB
+#define CS23_SW6 0xAC
+#define CS24_SW6 0xAD
+#define CS25_SW6 0xAE
+#define CS26_SW6 0xAF
+#define CS27_SW6 0xB0
+#define CS28_SW6 0xB1
+#define CS29_SW6 0xB2
+#define CS30_SW6 0xB3
diff --git a/drivers/led/issi/is31fl3743.h b/drivers/led/issi/is31fl3743.h
new file mode 100644
index 0000000000..d8fcd79096
--- /dev/null
+++ b/drivers/led/issi/is31fl3743.h
@@ -0,0 +1,327 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ * Copyright 2021 MasterSpoon
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// 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: 0b010(ADDR2)(ADDR1)
+#ifndef DRIVER_ADDR_1
+#    define DRIVER_ADDR_1 0b0100000
+#endif
+
+// Set defaults for Spread Spectrum Register
+#ifndef ISSI_SSR_1
+#    if DRIVER_COUNT == 1
+#        define ISSI_SSR_1 0x00
+#    else
+#        define ISSI_SSR_1 0xC0
+#    endif
+#endif
+#ifndef ISSI_SSR_2
+#    define ISSI_SSR_2 0x80
+#endif
+#ifndef ISSI_SSR_3
+#    define ISSI_SSR_3 0x80
+#endif
+#ifndef ISSI_SSR_4
+#    define ISSI_SSR_4 0x80
+#endif
+
+// Command Registers
+#define ISSI_COMMANDREGISTER_WRITELOCK 0xFE
+#define ISSI_COMMANDREGISTER 0xFD
+#define ISSI_IDREGISTER 0xFC
+#define ISSI_REGISTER_UNLOCK 0xC5
+
+// Response Registers
+#define ISSI_PAGE_PWM 0x00
+#define ISSI_PAGE_SCALING 0x01
+#define ISSI_PAGE_FUNCTION 0x02
+
+// Registers under Function Register
+#define ISSI_REG_CONFIGURATION 0x00
+#define ISSI_REG_GLOBALCURRENT 0x01
+#define ISSI_REG_PULLDOWNUP 0x02
+#define ISSI_REG_TEMP 0x24
+#define ISSI_REG_SSR 0x25
+#define ISSI_REG_RESET 0x2F
+
+// Set defaults for Function Registers
+#ifndef ISSI_CONFIGURATION
+#    define ISSI_CONFIGURATION 0x01
+#endif
+#ifndef ISSI_GLOBALCURRENT
+#    define ISSI_GLOBALCURRENT 0xFF
+#endif
+#ifndef ISSI_PULLDOWNUP
+#    define ISSI_PULLDOWNUP 0x33
+#endif
+#ifndef ISSI_TEMP
+#    define ISSI_TEMP 0x00
+#endif
+
+// Set defaults for Scaling registers
+#ifndef ISSI_SCAL_RED
+#    define ISSI_SCAL_RED 0xFF
+#endif
+#ifndef ISSI_SCAL_BLUE
+#    define ISSI_SCAL_BLUE 0xFF
+#endif
+#ifndef ISSI_SCAL_GREEN
+#    define ISSI_SCAL_GREEN 0xFF
+#endif
+#define ISSI_SCAL_RED_OFF 0x00
+#define ISSI_SCAL_GREEN_OFF 0x00
+#define ISSI_SCAL_BLUE_OFF 0x00
+
+#ifndef ISSI_SCAL_LED
+#    define ISSI_SCAL_LED 0xFF
+#endif
+#define ISSI_SCAL_LED_OFF 0x00
+
+// Set buffer sizes
+#define ISSI_MAX_LEDS 198
+#define ISSI_SCALING_SIZE 198
+#define ISSI_PWM_TRF_SIZE 18
+#define ISSI_SCALING_TRF_SIZE 18
+
+// Location of 1st bit for PWM and Scaling registers
+#define ISSI_PWM_REG_1ST 0x01
+#define ISSI_SCL_REG_1ST 0x01
+
+// Map CS SW locations to order in PWM / Scaling buffers
+// This matches the ORDER in the Datasheet Register not the POSITION
+// It will always count from 0x00 to (ISSI_MAX_LEDS - 1)
+#define CS1_SW1 0x00
+#define CS2_SW1 0x01
+#define CS3_SW1 0x02
+#define CS4_SW1 0x03
+#define CS5_SW1 0x04
+#define CS6_SW1 0x05
+#define CS7_SW1 0x06
+#define CS8_SW1 0x07
+#define CS9_SW1 0x08
+#define CS10_SW1 0x09
+#define CS11_SW1 0x0A
+#define CS12_SW1 0x0B
+#define CS13_SW1 0x0C
+#define CS14_SW1 0x0D
+#define CS15_SW1 0x0E
+#define CS16_SW1 0x0F
+#define CS17_SW1 0x10
+#define CS18_SW1 0x11
+
+#define CS1_SW2 0x12
+#define CS2_SW2 0x13
+#define CS3_SW2 0x14
+#define CS4_SW2 0x15
+#define CS5_SW2 0x16
+#define CS6_SW2 0x17
+#define CS7_SW2 0x18
+#define CS8_SW2 0x19
+#define CS9_SW2 0x1A
+#define CS10_SW2 0x1B
+#define CS11_SW2 0x1C
+#define CS12_SW2 0x1D
+#define CS13_SW2 0x1E
+#define CS14_SW2 0x1F
+#define CS15_SW2 0x20
+#define CS16_SW2 0x21
+#define CS17_SW2 0x22
+#define CS18_SW2 0x23
+
+#define CS1_SW3 0x24
+#define CS2_SW3 0x25
+#define CS3_SW3 0x26
+#define CS4_SW3 0x27
+#define CS5_SW3 0x28
+#define CS6_SW3 0x29
+#define CS7_SW3 0x2A
+#define CS8_SW3 0x2B
+#define CS9_SW3 0x2C
+#define CS10_SW3 0x2D
+#define CS11_SW3 0x2E
+#define CS12_SW3 0x2F
+#define CS13_SW3 0x30
+#define CS14_SW3 0x31
+#define CS15_SW3 0x32
+#define CS16_SW3 0x33
+#define CS17_SW3 0x34
+#define CS18_SW3 0x35
+
+#define CS1_SW4 0x36
+#define CS2_SW4 0x37
+#define CS3_SW4 0x38
+#define CS4_SW4 0x39
+#define CS5_SW4 0x3A
+#define CS6_SW4 0x3B
+#define CS7_SW4 0x3C
+#define CS8_SW4 0x3D
+#define CS9_SW4 0x3E
+#define CS10_SW4 0x3F
+#define CS11_SW4 0x40
+#define CS12_SW4 0x41
+#define CS13_SW4 0x42
+#define CS14_SW4 0x43
+#define CS15_SW4 0x44
+#define CS16_SW4 0x45
+#define CS17_SW4 0x46
+#define CS18_SW4 0x47
+
+#define CS1_SW5 0x48
+#define CS2_SW5 0x49
+#define CS3_SW5 0x4A
+#define CS4_SW5 0x4B
+#define CS5_SW5 0x4C
+#define CS6_SW5 0x4D
+#define CS7_SW5 0x4E
+#define CS8_SW5 0x4F
+#define CS9_SW5 0x50
+#define CS10_SW5 0x51
+#define CS11_SW5 0x52
+#define CS12_SW5 0x53
+#define CS13_SW5 0x54
+#define CS14_SW5 0x55
+#define CS15_SW5 0x56
+#define CS16_SW5 0x57
+#define CS17_SW5 0x58
+#define CS18_SW5 0x59
+
+#define CS1_SW6 0x5A
+#define CS2_SW6 0x5B
+#define CS3_SW6 0x5C
+#define CS4_SW6 0x5D
+#define CS5_SW6 0x5E
+#define CS6_SW6 0x5F
+#define CS7_SW6 0x60
+#define CS8_SW6 0x61
+#define CS9_SW6 0x62
+#define CS10_SW6 0x63
+#define CS11_SW6 0x64
+#define CS12_SW6 0x65
+#define CS13_SW6 0x66
+#define CS14_SW6 0x67
+#define CS15_SW6 0x68
+#define CS16_SW6 0x69
+#define CS17_SW6 0x6A
+#define CS18_SW6 0x6B
+
+#define CS1_SW7 0x6C
+#define CS2_SW7 0x6D
+#define CS3_SW7 0x6E
+#define CS4_SW7 0x6F
+#define CS5_SW7 0x70
+#define CS6_SW7 0x71
+#define CS7_SW7 0x72
+#define CS8_SW7 0x73
+#define CS9_SW7 0x74
+#define CS10_SW7 0x75
+#define CS11_SW7 0x76
+#define CS12_SW7 0x77
+#define CS13_SW7 0x78
+#define CS14_SW7 0x79
+#define CS15_SW7 0x7A
+#define CS16_SW7 0x7B
+#define CS17_SW7 0x7C
+#define CS18_SW7 0x7D
+
+#define CS1_SW8 0x7E
+#define CS2_SW8 0x7F
+#define CS3_SW8 0x80
+#define CS4_SW8 0x81
+#define CS5_SW8 0x82
+#define CS6_SW8 0x83
+#define CS7_SW8 0x84
+#define CS8_SW8 0x85
+#define CS9_SW8 0x86
+#define CS10_SW8 0x87
+#define CS11_SW8 0x88
+#define CS12_SW8 0x89
+#define CS13_SW8 0x8A
+#define CS14_SW8 0x8B
+#define CS15_SW8 0x8C
+#define CS16_SW8 0x8D
+#define CS17_SW8 0x8E
+#define CS18_SW8 0x8F
+
+#define CS1_SW9 0x90
+#define CS2_SW9 0x91
+#define CS3_SW9 0x92
+#define CS4_SW9 0x93
+#define CS5_SW9 0x94
+#define CS6_SW9 0x95
+#define CS7_SW9 0x96
+#define CS8_SW9 0x97
+#define CS9_SW9 0x98
+#define CS10_SW9 0x99
+#define CS11_SW9 0x9A
+#define CS12_SW9 0x9B
+#define CS13_SW9 0x9C
+#define CS14_SW9 0x9D
+#define CS15_SW9 0x9E
+#define CS16_SW9 0x9F
+#define CS17_SW9 0xA0
+#define CS18_SW9 0xA1
+
+#define CS1_SW10 0xA2
+#define CS2_SW10 0xA3
+#define CS3_SW10 0xA4
+#define CS4_SW10 0xA5
+#define CS5_SW10 0xA6
+#define CS6_SW10 0xA7
+#define CS7_SW10 0xA8
+#define CS8_SW10 0xA9
+#define CS9_SW10 0xAA
+#define CS10_SW10 0xAB
+#define CS11_SW10 0xAC
+#define CS12_SW10 0xAD
+#define CS13_SW10 0xAE
+#define CS14_SW10 0xAF
+#define CS15_SW10 0xB0
+#define CS16_SW10 0xB1
+#define CS17_SW10 0xB2
+#define CS18_SW10 0xB3
+
+#define CS1_SW11 0xB4
+#define CS2_SW11 0xB5
+#define CS3_SW11 0xB6
+#define CS4_SW11 0xB7
+#define CS5_SW11 0xB8
+#define CS6_SW11 0xB9
+#define CS7_SW11 0xBA
+#define CS8_SW11 0xBB
+#define CS9_SW11 0xBC
+#define CS10_SW11 0xBD
+#define CS11_SW11 0xBE
+#define CS12_SW11 0xBF
+#define CS13_SW11 0xC0
+#define CS14_SW11 0xC1
+#define CS15_SW11 0xC2
+#define CS16_SW11 0xC3
+#define CS17_SW11 0xC4
+#define CS18_SW11 0xC5
diff --git a/drivers/led/issi/is31fl3745.h b/drivers/led/issi/is31fl3745.h
new file mode 100644
index 0000000000..ca5dd4a986
--- /dev/null
+++ b/drivers/led/issi/is31fl3745.h
@@ -0,0 +1,270 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ * Copyright 2021 MasterSpoon
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// 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: 0b010(ADDR2)(ADDR1)
+#ifndef DRIVER_ADDR_1
+#    define DRIVER_ADDR_1 0b0100000
+#endif
+
+// Set defaults for Spread Spectrum Register
+#ifndef ISSI_SSR_1
+#    if DRIVER_COUNT == 1
+#        define ISSI_SSR_1 0x00
+#    else
+#        define ISSI_SSR_1 0xC0
+#    endif
+#endif
+#ifndef ISSI_SSR_2
+#    define ISSI_SSR_2 0x80
+#endif
+#ifndef ISSI_SSR_3
+#    define ISSI_SSR_3 0x80
+#endif
+#ifndef ISSI_SSR_4
+#    define ISSI_SSR_4 0x80
+#endif
+
+// Command Registers
+#define ISSI_COMMANDREGISTER_WRITELOCK 0xFE
+#define ISSI_COMMANDREGISTER 0xFD
+#define ISSI_IDREGISTER 0xFC
+#define ISSI_REGISTER_UNLOCK 0xC5
+
+// Response Registers
+#define ISSI_PAGE_PWM 0x00
+#define ISSI_PAGE_SCALING 0x01
+#define ISSI_PAGE_FUNCTION 0x02
+
+// Registers under Function Register
+#define ISSI_REG_CONFIGURATION 0x00
+#define ISSI_REG_GLOBALCURRENT 0x01
+#define ISSI_REG_PULLDOWNUP 0x02
+#define ISSI_REG_TEMP 0x24
+#define ISSI_REG_SSR 0x25
+#define ISSI_REG_RESET 0x2F
+
+// Set defaults for Function Registers
+#ifndef ISSI_CONFIGURATION
+#    define ISSI_CONFIGURATION 0x31
+#endif
+#ifndef ISSI_GLOBALCURRENT
+#    define ISSI_GLOBALCURRENT 0xFF
+#endif
+#ifndef ISSI_PULLDOWNUP
+#    define ISSI_PULLDOWNUP 0x33
+#endif
+#ifndef ISSI_TEMP
+#    define ISSI_TEMP 0x00
+#endif
+
+// Set defaults for Scaling registers
+#ifndef ISSI_SCAL_RED
+#    define ISSI_SCAL_RED 0xFF
+#endif
+#ifndef ISSI_SCAL_BLUE
+#    define ISSI_SCAL_BLUE 0xFF
+#endif
+#ifndef ISSI_SCAL_GREEN
+#    define ISSI_SCAL_GREEN 0xFF
+#endif
+#define ISSI_SCAL_RED_OFF 0x00
+#define ISSI_SCAL_GREEN_OFF 0x00
+#define ISSI_SCAL_BLUE_OFF 0x00
+
+#ifndef ISSI_SCAL_LED
+#    define ISSI_SCAL_LED 0xFF
+#endif
+#define ISSI_SCAL_LED_OFF 0x00
+
+// Set buffer sizes
+#define ISSI_MAX_LEDS 144
+#define ISSI_SCALING_SIZE 144
+#define ISSI_PWM_TRF_SIZE 18
+#define ISSI_SCALING_TRF_SIZE 18
+
+// Location of 1st bit for PWM and Scaling registers
+#define ISSI_PWM_REG_1ST 0x01
+#define ISSI_SCL_REG_1ST 0x01
+
+// Map CS SW locations to order in PWM / Scaling buffers
+// This matches the ORDER in the Datasheet Register not the POSITION
+// It will always count from 0x00 to (ISSI_MAX_LEDS - 1)
+#define CS1_SW1 0x00
+#define CS2_SW1 0x01
+#define CS3_SW1 0x02
+#define CS4_SW1 0x03
+#define CS5_SW1 0x04
+#define CS6_SW1 0x05
+#define CS7_SW1 0x06
+#define CS8_SW1 0x07
+#define CS9_SW1 0x08
+#define CS10_SW1 0x09
+#define CS11_SW1 0x0A
+#define CS12_SW1 0x0B
+#define CS13_SW1 0x0C
+#define CS14_SW1 0x0D
+#define CS15_SW1 0x0E
+#define CS16_SW1 0x0F
+#define CS17_SW1 0x10
+#define CS18_SW1 0x11
+
+#define CS1_SW2 0x12
+#define CS2_SW2 0x13
+#define CS3_SW2 0x14
+#define CS4_SW2 0x15
+#define CS5_SW2 0x16
+#define CS6_SW2 0x17
+#define CS7_SW2 0x18
+#define CS8_SW2 0x19
+#define CS9_SW2 0x1A
+#define CS10_SW2 0x1B
+#define CS11_SW2 0x1C
+#define CS12_SW2 0x1D
+#define CS13_SW2 0x1E
+#define CS14_SW2 0x1F
+#define CS15_SW2 0x20
+#define CS16_SW2 0x21
+#define CS17_SW2 0x22
+#define CS18_SW2 0x23
+
+#define CS1_SW3 0x24
+#define CS2_SW3 0x25
+#define CS3_SW3 0x26
+#define CS4_SW3 0x27
+#define CS5_SW3 0x28
+#define CS6_SW3 0x29
+#define CS7_SW3 0x2A
+#define CS8_SW3 0x2B
+#define CS9_SW3 0x2C
+#define CS10_SW3 0x2D
+#define CS11_SW3 0x2E
+#define CS12_SW3 0x2F
+#define CS13_SW3 0x30
+#define CS14_SW3 0x31
+#define CS15_SW3 0x32
+#define CS16_SW3 0x33
+#define CS17_SW3 0x34
+#define CS18_SW3 0x35
+
+#define CS1_SW4 0x36
+#define CS2_SW4 0x37
+#define CS3_SW4 0x38
+#define CS4_SW4 0x39
+#define CS5_SW4 0x3A
+#define CS6_SW4 0x3B
+#define CS7_SW4 0x3C
+#define CS8_SW4 0x3D
+#define CS9_SW4 0x3E
+#define CS10_SW4 0x3F
+#define CS11_SW4 0x40
+#define CS12_SW4 0x41
+#define CS13_SW4 0x42
+#define CS14_SW4 0x43
+#define CS15_SW4 0x44
+#define CS16_SW4 0x45
+#define CS17_SW4 0x46
+#define CS18_SW4 0x47
+
+#define CS1_SW5 0x48
+#define CS2_SW5 0x49
+#define CS3_SW5 0x4A
+#define CS4_SW5 0x4B
+#define CS5_SW5 0x4C
+#define CS6_SW5 0x4D
+#define CS7_SW5 0x4E
+#define CS8_SW5 0x4F
+#define CS9_SW5 0x50
+#define CS10_SW5 0x51
+#define CS11_SW5 0x52
+#define CS12_SW5 0x53
+#define CS13_SW5 0x54
+#define CS14_SW5 0x55
+#define CS15_SW5 0x56
+#define CS16_SW5 0x57
+#define CS17_SW5 0x58
+#define CS18_SW5 0x59
+
+#define CS1_SW6 0x5A
+#define CS2_SW6 0x5B
+#define CS3_SW6 0x5C
+#define CS4_SW6 0x5D
+#define CS5_SW6 0x5E
+#define CS6_SW6 0x5F
+#define CS7_SW6 0x60
+#define CS8_SW6 0x61
+#define CS9_SW6 0x62
+#define CS10_SW6 0x63
+#define CS11_SW6 0x64
+#define CS12_SW6 0x65
+#define CS13_SW6 0x66
+#define CS14_SW6 0x67
+#define CS15_SW6 0x68
+#define CS16_SW6 0x69
+#define CS17_SW6 0x6A
+#define CS18_SW6 0x6B
+
+#define CS1_SW7 0x6C
+#define CS2_SW7 0x6D
+#define CS3_SW7 0x6E
+#define CS4_SW7 0x6F
+#define CS5_SW7 0x70
+#define CS6_SW7 0x71
+#define CS7_SW7 0x72
+#define CS8_SW7 0x73
+#define CS9_SW7 0x74
+#define CS10_SW7 0x75
+#define CS11_SW7 0x76
+#define CS12_SW7 0x77
+#define CS13_SW7 0x78
+#define CS14_SW7 0x79
+#define CS15_SW7 0x7A
+#define CS16_SW7 0x7B
+#define CS17_SW7 0x7C
+#define CS18_SW7 0x7D
+
+#define CS1_SW8 0x7E
+#define CS2_SW8 0x7F
+#define CS3_SW8 0x80
+#define CS4_SW8 0x81
+#define CS5_SW8 0x82
+#define CS6_SW8 0x83
+#define CS7_SW8 0x84
+#define CS8_SW8 0x85
+#define CS9_SW8 0x86
+#define CS10_SW8 0x87
+#define CS11_SW8 0x88
+#define CS12_SW8 0x89
+#define CS13_SW8 0x8A
+#define CS14_SW8 0x8B
+#define CS15_SW8 0x8C
+#define CS16_SW8 0x8D
+#define CS17_SW8 0x8E
+#define CS18_SW8 0x8F
diff --git a/drivers/led/issi/is31fl3746.h b/drivers/led/issi/is31fl3746.h
new file mode 100644
index 0000000000..f89f281533
--- /dev/null
+++ b/drivers/led/issi/is31fl3746.h
@@ -0,0 +1,198 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ * Copyright 2021 MasterSpoon
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// 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: 0b110(ADDR2)(ADDR1)
+#ifndef DRIVER_ADDR_1
+#    define DRIVER_ADDR_1 0b1100000
+#endif
+
+// Set defaults for Spread Spectrum Register
+#ifndef ISSI_SSR_1
+#    define ISSI_SSR_1 0x00
+#endif
+#ifndef ISSI_SSR_2
+#    define ISSI_SSR_2 0x00
+#endif
+#ifndef ISSI_SSR_3
+#    define ISSI_SSR_3 0x00
+#endif
+#ifndef ISSI_SSR_4
+#    define ISSI_SSR_4 0x00
+#endif
+
+// Command Registers
+#define ISSI_COMMANDREGISTER_WRITELOCK 0xFE
+#define ISSI_COMMANDREGISTER 0xFD
+#define ISSI_IDREGISTER 0xFC
+#define ISSI_REGISTER_UNLOCK 0xC5
+
+// Response Registers
+#define ISSI_PAGE_PWM 0x00
+#define ISSI_PAGE_SCALING 0x01
+#define ISSI_PAGE_FUNCTION 0x01
+
+// Registers under Function Register
+#define ISSI_REG_CONFIGURATION 0x50
+#define ISSI_REG_GLOBALCURRENT 0x51
+#define ISSI_REG_PULLDOWNUP 0x52
+#define ISSI_REG_TEMP 0x5F
+#define ISSI_REG_SSR 0x60
+#define ISSI_REG_RESET 0x8F
+#define ISSI_REG_PWM_ENABLE 0xE0
+#define ISSI_REG_PWM_SET 0xE2
+
+// Set defaults for Function Registers
+#ifndef ISSI_CONFIGURATION
+#    define ISSI_CONFIGURATION 0x01
+#endif
+#ifndef ISSI_GLOBALCURRENT
+#    define ISSI_GLOBALCURRENT 0xFF
+#endif
+#ifndef ISSI_PULLDOWNUP
+#    define ISSI_PULLDOWNUP 0x33
+#endif
+#ifndef ISSI_TEMP
+#    define ISSI_TEMP 0x00
+#endif
+#ifndef ISSI_PWM_ENABLE
+#    define ISSI_PWM_ENABLE 0x00
+#endif
+#ifndef ISSI_PWM_SET
+#    define ISSI_PWM_SET 0x00
+#endif
+
+// Set defaults for Scaling registers
+#ifndef ISSI_SCAL_RED
+#    define ISSI_SCAL_RED 0xFF
+#endif
+#ifndef ISSI_SCAL_BLUE
+#    define ISSI_SCAL_BLUE 0xFF
+#endif
+#ifndef ISSI_SCAL_GREEN
+#    define ISSI_SCAL_GREEN 0xFF
+#endif
+#define ISSI_SCAL_RED_OFF 0x00
+#define ISSI_SCAL_GREEN_OFF 0x00
+#define ISSI_SCAL_BLUE_OFF 0x00
+
+#ifndef ISSI_SCAL_LED
+#    define ISSI_SCAL_LED 0xFF
+#endif
+#define ISSI_SCAL_LED_OFF 0x00
+
+// Set buffer sizes
+#define ISSI_MAX_LEDS 72
+#define ISSI_SCALING_SIZE 72
+#define ISSI_PWM_TRF_SIZE 18
+#define ISSI_SCALING_TRF_SIZE 18
+
+// Location of 1st bit for PWM and Scaling registers
+#define ISSI_PWM_REG_1ST 0x01
+#define ISSI_SCL_REG_1ST 0x01
+
+// Map CS SW locations to order in PWM / Scaling buffers
+// This matches the ORDER in the Datasheet Register not the POSITION
+// It will always count from 0x00 to (ISSI_MAX_LEDS - 1)
+#define CS1_SW1 0x00
+#define CS2_SW1 0x01
+#define CS3_SW1 0x02
+#define CS4_SW1 0x03
+#define CS5_SW1 0x04
+#define CS6_SW1 0x05
+#define CS7_SW1 0x06
+#define CS8_SW1 0x07
+#define CS9_SW1 0x08
+#define CS10_SW1 0x09
+#define CS11_SW1 0x0A
+#define CS12_SW1 0x0B
+#define CS13_SW1 0x0C
+#define CS14_SW1 0x0D
+#define CS15_SW1 0x0E
+#define CS16_SW1 0x0F
+#define CS17_SW1 0x10
+#define CS18_SW1 0x11
+
+#define CS1_SW2 0x12
+#define CS2_SW2 0x13
+#define CS3_SW2 0x14
+#define CS4_SW2 0x15
+#define CS5_SW2 0x16
+#define CS6_SW2 0x17
+#define CS7_SW2 0x18
+#define CS8_SW2 0x19
+#define CS9_SW2 0x1A
+#define CS10_SW2 0x1B
+#define CS11_SW2 0x1C
+#define CS12_SW2 0x1D
+#define CS13_SW2 0x1E
+#define CS14_SW2 0x1F
+#define CS15_SW2 0x20
+#define CS16_SW2 0x21
+#define CS17_SW2 0x22
+#define CS18_SW2 0x23
+
+#define CS1_SW3 0x24
+#define CS2_SW3 0x25
+#define CS3_SW3 0x26
+#define CS4_SW3 0x27
+#define CS5_SW3 0x28
+#define CS6_SW3 0x29
+#define CS7_SW3 0x2A
+#define CS8_SW3 0x2B
+#define CS9_SW3 0x2C
+#define CS10_SW3 0x2D
+#define CS11_SW3 0x2E
+#define CS12_SW3 0x2F
+#define CS13_SW3 0x30
+#define CS14_SW3 0x31
+#define CS15_SW3 0x32
+#define CS16_SW3 0x33
+#define CS17_SW3 0x34
+#define CS18_SW3 0x35
+
+#define CS1_SW4 0x36
+#define CS2_SW4 0x37
+#define CS3_SW4 0x38
+#define CS4_SW4 0x39
+#define CS5_SW4 0x3A
+#define CS6_SW4 0x3B
+#define CS7_SW4 0x3C
+#define CS8_SW4 0x3D
+#define CS9_SW4 0x3E
+#define CS10_SW4 0x3F
+#define CS11_SW4 0x40
+#define CS12_SW4 0x41
+#define CS13_SW4 0x42
+#define CS14_SW4 0x43
+#define CS15_SW4 0x44
+#define CS16_SW4 0x45
+#define CS17_SW4 0x46
+#define CS18_SW4 0x47
diff --git a/drivers/led/issi/is31flcommon.c b/drivers/led/issi/is31flcommon.c
new file mode 100644
index 0000000000..9f4b2123ff
--- /dev/null
+++ b/drivers/led/issi/is31flcommon.c
@@ -0,0 +1,230 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ * Copyright 2021 MasterSpoon
+ *
+ * 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 "is31flcommon.h"
+#include "i2c_master.h"
+#include "wait.h"
+#include <string.h>
+
+// Set defaults for Timeout and Persistence
+#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 PWM & scaling registers.
+// Storing them like this is optimal for I2C transfers to the registers.
+uint8_t g_pwm_buffer[DRIVER_COUNT][ISSI_MAX_LEDS];
+bool    g_pwm_buffer_update_required[DRIVER_COUNT] = {false};
+
+uint8_t g_scaling_buffer[DRIVER_COUNT][ISSI_SCALING_SIZE];
+bool    g_scaling_buffer_update_required[DRIVER_COUNT] = {false};
+
+// For writing of single register entry
+void IS31FL_write_single_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    // Set register address and register data ready to write
+    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
+}
+
+// For writing of mulitple register entries to make use of address auto increment
+// Once the controller has been called and we have written the first bit of data
+// the controller will move to the next register meaning we can write sequential blocks.
+bool IS31FL_write_multi_registers(uint8_t addr, uint8_t *source_buffer, uint8_t buffer_size, uint8_t transfer_size, uint8_t start_reg_addr) {
+    // Split the buffer into chunks to transfer
+    for (int i = 0; i < buffer_size; i += transfer_size) {
+        // Set the first entry of transfer buffer to the first register we want to write
+        g_twi_transfer_buffer[0] = i + start_reg_addr;
+        // Copy the section of our source buffer into the transfer buffer after first register address
+        memcpy(g_twi_transfer_buffer + 1, source_buffer + i, transfer_size);
+
+#if ISSI_PERSISTENCE > 0
+        for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, g_twi_transfer_buffer, transfer_size + 1, ISSI_TIMEOUT) != 0) {
+                return false;
+            }
+        }
+#else
+        if (i2c_transmit(addr << 1, g_twi_transfer_buffer, transfer_size + 1, ISSI_TIMEOUT) != 0) {
+            return false;
+        }
+#endif
+    }
+    return true;
+}
+
+void IS31FL_unlock_register(uint8_t addr, uint8_t page) {
+    // unlock the command register and select Page to write
+    IS31FL_write_single_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, ISSI_REGISTER_UNLOCK);
+    IS31FL_write_single_register(addr, ISSI_COMMANDREGISTER, page);
+}
+
+void IS31FL_common_init(uint8_t addr, uint8_t ssr) {
+    // Setup phase, need to take out of software shutdown and configure
+    // ISSI_SSR_x is passed to allow Master / Slave setting where applicable
+
+    // Unlock the command register & select Function Register
+    IS31FL_unlock_register(addr, ISSI_PAGE_FUNCTION);
+    // Set Configuration Register to remove Software shutdown
+    IS31FL_write_single_register(addr, ISSI_REG_CONFIGURATION, ISSI_CONFIGURATION);
+    // Set Golbal Current Control Register
+    IS31FL_write_single_register(addr, ISSI_REG_GLOBALCURRENT, ISSI_GLOBALCURRENT);
+    // Set Pull up & Down for SWx CSy
+    IS31FL_write_single_register(addr, ISSI_REG_PULLDOWNUP, ISSI_PULLDOWNUP);
+// Set Tempature Status
+#ifdef ISSI_REG_TEMP
+    IS31FL_write_single_register(addr, ISSI_REG_TEMP, ISSI_TEMP);
+#endif
+    // Set Spread Spectrum Register, passed through as sets SYNC function
+    IS31FL_write_single_register(addr, ISSI_REG_SSR, ssr);
+// Set PWM Frequency Enable Register if applicable
+#ifdef ISSI_REG_PWM_ENABLE
+    IS31FL_write_single_register(addr, ISSI_REG_PWM_ENABLE, ISSI_PWM_ENABLE);
+#endif
+// Set PWM Frequency Register if applicable
+#ifdef ISSI_REG_PWM_SET
+    IS31FL_write_single_register(addr, ISSI_REG_PWM_SET, ISSI_PWM_SET);
+#endif
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void IS31FL_common_update_pwm_register(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        // Queue up the correct page
+        IS31FL_unlock_register(addr, ISSI_PAGE_PWM);
+        // Hand off the update to IS31FL_write_multi_registers
+        IS31FL_write_multi_registers(addr, g_pwm_buffer[index], ISSI_MAX_LEDS, ISSI_PWM_TRF_SIZE, ISSI_PWM_REG_1ST);
+        // Update flags that pwm_buffer has been updated
+        g_pwm_buffer_update_required[index] = false;
+    }
+}
+
+#ifdef ISSI_MANUAL_SCALING
+void IS31FL_set_manual_scaling_buffer(void) {
+    for (int i = 0; i < ISSI_MANUAL_SCALING; i++) {
+        is31_led scale = g_is31_scaling[i];
+        if (scale.driver >= 0 && scale.driver < DRIVER_LED_TOTAL) {
+            is31_led led = g_is31_leds[scale.driver];
+
+#    ifdef RGB_MATRIX_ENABLE
+            g_scaling_buffer[led.driver][led.r] = scale.r;
+            g_scaling_buffer[led.driver][led.g] = scale.g;
+            g_scaling_buffer[led.driver][led.b] = scale.b;
+#    elif defined(LED_MATRIX_ENABLE)
+            g_scaling_buffer[led.driver][led.v] = scale.v;
+#    endif
+            g_scaling_buffer_update_required[led.driver] = true;
+        }
+    }
+}
+#endif
+
+void IS31FL_common_update_scaling_register(uint8_t addr, uint8_t index) {
+    if (g_scaling_buffer_update_required[index]) {
+        // Queue up the correct page
+        IS31FL_unlock_register(addr, ISSI_PAGE_SCALING);
+        // Hand off the update to IS31FL_write_multi_registers
+        IS31FL_write_multi_registers(addr, g_scaling_buffer[index], ISSI_SCALING_SIZE, ISSI_SCALING_TRF_SIZE, ISSI_SCL_REG_1ST);
+        // Update flags that scaling_buffer has been updated
+        g_scaling_buffer_update_required[index] = false;
+    }
+}
+
+#ifdef RGB_MATRIX_ENABLE
+// Colour is set by adjusting PWM register
+void IS31FL_RGB_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
+    if (index >= 0 && index < DRIVER_LED_TOTAL) {
+        is31_led led = g_is31_leds[index];
+
+        g_pwm_buffer[led.driver][led.r]          = red;
+        g_pwm_buffer[led.driver][led.g]          = green;
+        g_pwm_buffer[led.driver][led.b]          = blue;
+        g_pwm_buffer_update_required[led.driver] = true;
+    }
+}
+
+void IS31FL_RGB_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
+    for (int i = 0; i < DRIVER_LED_TOTAL; i++) {
+        IS31FL_RGB_set_color(i, red, green, blue);
+    }
+}
+
+// Setup Scaling register that decides the peak current of each LED
+void IS31FL_RGB_set_scaling_buffer(uint8_t index, bool red, bool green, bool blue) {
+    is31_led led = g_is31_leds[index];
+    if (red) {
+        g_scaling_buffer[led.driver][led.r] = ISSI_SCAL_RED;
+    } else {
+        g_scaling_buffer[led.driver][led.r] = ISSI_SCAL_RED_OFF;
+    }
+    if (green) {
+        g_scaling_buffer[led.driver][led.g] = ISSI_SCAL_GREEN;
+    } else {
+        g_scaling_buffer[led.driver][led.g] = ISSI_SCAL_GREEN_OFF;
+    }
+    if (blue) {
+        g_scaling_buffer[led.driver][led.b] = ISSI_SCAL_BLUE;
+    } else {
+        g_scaling_buffer[led.driver][led.b] = ISSI_SCAL_BLUE_OFF;
+    }
+    g_scaling_buffer_update_required[led.driver] = true;
+}
+
+#elif defined(LED_MATRIX_ENABLE)
+// LED Matrix Specific scripts
+void IS31FL_simple_set_scaling_buffer(uint8_t index, bool value) {
+    is31_led led = g_is31_leds[index];
+    if (value) {
+        g_scaling_buffer[led.driver][led.v] = ISSI_SCAL_LED;
+    } else {
+        g_scaling_buffer[led.driver][led.v] = ISSI_SCAL_LED_OFF;
+    }
+    g_scaling_buffer_update_required[led.driver] = true;
+}
+
+void IS31FL_simple_set_brightness(int index, uint8_t value) {
+    if (index >= 0 && index < DRIVER_LED_TOTAL) {
+        is31_led led = g_is31_leds[index];
+        g_pwm_buffer[led.driver][led.v] = value;
+        g_pwm_buffer_update_required[led.driver] = true;
+    }
+}
+
+void IS31FL_simple_set_brigntness_all(uint8_t value) {
+    for (int i = 0; i < DRIVER_LED_TOTAL; i++) {
+        IS31FL_simple_set_brightness(i, value);
+    }
+}
+#endif
diff --git a/drivers/led/issi/is31flcommon.h b/drivers/led/issi/is31flcommon.h
new file mode 100644
index 0000000000..77e9665e32
--- /dev/null
+++ b/drivers/led/issi/is31flcommon.h
@@ -0,0 +1,78 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ * Copyright 2021 MasterSpoon
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+
+// Which variant header file to use
+#ifdef IS31FL3742A
+#    include "is31fl3742.h"
+#elif defined(IS31FL3743A)
+#    include "is31fl3743.h"
+#elif defined(IS31FL3745)
+#    include "is31fl3745.h"
+#elif defined(IS31FL3746A)
+#    include "is31fl3746.h"
+#endif
+
+#ifdef RGB_MATRIX_ENABLE
+typedef struct is31_led {
+    uint8_t driver;
+    uint8_t r;
+    uint8_t g;
+    uint8_t b;
+} __attribute__((packed)) is31_led;
+
+#elif defined(LED_MATRIX_ENABLE)
+typedef struct is31_led {
+    uint8_t driver;
+    uint8_t v;
+} __attribute__((packed)) is31_led;
+#endif
+
+#ifdef ISSI_MANUAL_SCALING
+extern const is31_led __flash g_is31_scaling[];
+void                          IS31FL_set_manual_scaling_buffer(void);
+#endif
+
+extern const is31_led __flash g_is31_leds[DRIVER_LED_TOTAL];
+
+void IS31FL_write_single_register(uint8_t addr, uint8_t reg, uint8_t data);
+bool IS31FL_write_multi_registers(uint8_t addr, uint8_t *source_buffer, uint8_t buffer_size, uint8_t transfer_size, uint8_t start_reg_addr);
+void IS31FL_unlock_register(uint8_t addr, uint8_t page);
+void IS31FL_common_init(uint8_t addr, uint8_t ssr);
+
+void IS31FL_common_update_pwm_register(uint8_t addr, uint8_t index);
+void IS31FL_common_update_scaling_register(uint8_t addr, uint8_t index);
+
+#ifdef RGB_MATRIX_ENABLE
+// RGB Matrix Specific scripts
+void IS31FL_RGB_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
+void IS31FL_RGB_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
+void IS31FL_RGB_set_scaling_buffer(uint8_t index, bool red, bool green, bool blue);
+#elif defined(LED_MATRIX_ENABLE)
+// LED Matrix Specific scripts
+void IS31FL_simple_set_scaling_buffer(uint8_t index, bool value);
+void IS31FL_simple_set_brightness(int index, uint8_t value);
+void IS31FL_simple_set_brigntness_all(uint8_t value);
+#endif
diff --git a/quantum/led_matrix/led_matrix.h b/quantum/led_matrix/led_matrix.h
index cb7526d6e0..d21f36e295 100644
--- a/quantum/led_matrix/led_matrix.h
+++ b/quantum/led_matrix/led_matrix.h
@@ -27,6 +27,8 @@
 
 #ifdef IS31FL3731
 #    include "is31fl3731-simple.h"
+#elif defined(IS31FLCOMMON)
+#    include "is31flcommon.h"
 #endif
 #ifdef IS31FL3733
 #    include "is31fl3733-simple.h"
diff --git a/quantum/led_matrix/led_matrix_drivers.c b/quantum/led_matrix/led_matrix_drivers.c
index 2157619a0b..847ca1c310 100644
--- a/quantum/led_matrix/led_matrix_drivers.c
+++ b/quantum/led_matrix/led_matrix_drivers.c
@@ -25,7 +25,7 @@
  * in their own files.
  */
 
-#if defined(IS31FL3731) || defined(IS31FL3733)
+#if defined(IS31FL3731) || defined(IS31FL3733) || defined(IS31FLCOMMON)
 #    include "i2c_master.h"
 
 static void init(void) {
@@ -66,6 +66,18 @@ static void init(void) {
 #                endif
 #            endif
 #        endif
+
+#    elif defined(IS31FLCOMMON)
+    IS31FL_common_init(DRIVER_ADDR_1, ISSI_SSR_1);
+#        if defined(LED_DRIVER_ADDR_2)
+    IS31FL_common_init(DRIVER_ADDR_2, ISSI_SSR_2);
+#            if defined(LED_DRIVER_ADDR_3)
+    IS31FL_common_init(DRIVER_ADDR_3, ISSI_SSR_3);
+#                if defined(LED_DRIVER_ADDR_4)
+    IS31FL_common_init(DRIVER_ADDR_4, ISSI_SSR_4);
+#                endif
+#            endif
+#        endif
 #    endif
 
     for (int index = 0; index < DRIVER_LED_TOTAL; index++) {
@@ -73,6 +85,8 @@ static void init(void) {
         IS31FL3731_set_led_control_register(index, true);
 #    elif defined(IS31FL3733)
         IS31FL3733_set_led_control_register(index, true);
+#    elif defined(IS31FLCOMMON)
+        IS31FL_simple_set_scaling_buffer(index, true);
 #    endif
     }
 
@@ -100,6 +114,21 @@ static void init(void) {
 #                endif
 #            endif
 #        endif
+
+#    elif defined(IS31FLCOMMON)
+#        ifdef ISSI_MANUAL_SCALING
+    IS31FL_set_manual_scaling_buffer();
+#        endif
+    IS31FL_common_update_scaling_register(DRIVER_ADDR_1, 0);
+#        if defined(LED_DRIVER_ADDR_2)
+    IS31FL_common_update_scaling_register(DRIVER_ADDR_2, 1);
+#            if defined(LED_DRIVER_ADDR_3)
+    IS31FL_common_update_scaling_register(DRIVER_ADDR_3, 2);
+#                if defined(LED_DRIVER_ADDR_4)
+    IS31FL_common_update_scaling_register(DRIVER_ADDR_4, 3);
+#                endif
+#            endif
+#        endif
 #    endif
 }
 
@@ -144,5 +173,26 @@ const led_matrix_driver_t led_matrix_driver = {
     .set_value = IS31FL3733_set_value,
     .set_value_all = IS31FL3733_set_value_all,
 };
+
+#    elif defined(IS31FLCOMMON)
+static void flush(void) {
+    IS31FL_common_update_pwm_register(DRIVER_ADDR_1, 0);
+#        if defined(LED_DRIVER_ADDR_2)
+    IS31FL_common_update_pwm_register(DRIVER_ADDR_2, 1);
+#            if defined(LED_DRIVER_ADDR_3)
+    IS31FL_common_update_pwm_register(DRIVER_ADDR_3, 2);
+#                if defined(LED_DRIVER_ADDR_4)
+    IS31FL_common_update_pwm_register(DRIVER_ADDR_4, 3);
+#                endif
+#            endif
+#        endif
+}
+
+const led_matrix_driver_t led_matrix_driver = {
+    .init = init,
+    .flush = flush,
+    .set_value = IS31FL_simple_set_brightness,
+    .set_value_all = IS31FL_simple_set_brigntness_all,
+};
 #    endif
 #endif
diff --git a/quantum/rgb_matrix/rgb_matrix.h b/quantum/rgb_matrix/rgb_matrix.h
index 3cd77857be..359d507a4d 100644
--- a/quantum/rgb_matrix/rgb_matrix.h
+++ b/quantum/rgb_matrix/rgb_matrix.h
@@ -32,6 +32,8 @@
 #    include "is31fl3737.h"
 #elif defined(IS31FL3741)
 #    include "is31fl3741.h"
+#elif defined(IS31FLCOMMON)
+#    include "is31flcommon.h"
 #elif defined(CKLED2001)
 #    include "ckled2001.h"
 #elif defined(AW20216)
diff --git a/quantum/rgb_matrix/rgb_matrix_drivers.c b/quantum/rgb_matrix/rgb_matrix_drivers.c
index 130ca47a63..bdd512d1c2 100644
--- a/quantum/rgb_matrix/rgb_matrix_drivers.c
+++ b/quantum/rgb_matrix/rgb_matrix_drivers.c
@@ -23,7 +23,7 @@
  * be here if shared between boards.
  */
 
-#if defined(IS31FL3731) || defined(IS31FL3733) || defined(IS31FL3737) || defined(IS31FL3741) || defined(CKLED2001)
+#if defined(IS31FL3731) || defined(IS31FL3733) || defined(IS31FL3737) || defined(IS31FL3741) || defined(IS31FLCOMMON) || defined(CKLED2001)
 #    include "i2c_master.h"
 
 // TODO: Remove this at some later date
@@ -81,6 +81,18 @@ static void init(void) {
 #    elif defined(IS31FL3741)
     IS31FL3741_init(DRIVER_ADDR_1);
 
+#    elif defined(IS31FLCOMMON)
+    IS31FL_common_init(DRIVER_ADDR_1, ISSI_SSR_1);
+#        if defined(DRIVER_ADDR_2)
+    IS31FL_common_init(DRIVER_ADDR_2, ISSI_SSR_2);
+#            if defined(DRIVER_ADDR_3)
+    IS31FL_common_init(DRIVER_ADDR_3, ISSI_SSR_3);
+#                if defined(DRIVER_ADDR_4)
+    IS31FL_common_init(DRIVER_ADDR_4, ISSI_SSR_4);
+#                endif
+#            endif
+#        endif
+
 #    elif defined(CKLED2001)
     CKLED2001_init(DRIVER_ADDR_1);
 #        if defined(DRIVER_ADDR_2)
@@ -106,6 +118,8 @@ static void init(void) {
         IS31FL3737_set_led_control_register(index, enabled, enabled, enabled);
 #    elif defined(IS31FL3741)
         IS31FL3741_set_led_control_register(index, enabled, enabled, enabled);
+#    elif defined(IS31FLCOMMON)
+        IS31FL_RGB_set_scaling_buffer(index, enabled, enabled, enabled);
 #    elif defined(CKLED2001)
         CKLED2001_set_led_control_register(index, enabled, enabled, enabled);
 #    endif
@@ -145,6 +159,21 @@ static void init(void) {
 #    elif defined(IS31FL3741)
     IS31FL3741_update_led_control_registers(DRIVER_ADDR_1, 0);
 
+#    elif defined(IS31FLCOMMON)
+#        ifdef ISSI_MANUAL_SCALING
+    IS31FL_set_manual_scaling_buffer();
+#        endif
+    IS31FL_common_update_scaling_register(DRIVER_ADDR_1, 0);
+#        if defined(DRIVER_ADDR_2)
+    IS31FL_common_update_scaling_register(DRIVER_ADDR_2, 1);
+#            if defined(DRIVER_ADDR_3)
+    IS31FL_common_update_scaling_register(DRIVER_ADDR_3, 2);
+#                if defined(DRIVER_ADDR_4)
+    IS31FL_common_update_scaling_register(DRIVER_ADDR_4, 3);
+#                endif
+#            endif
+#        endif
+
 #    elif defined(CKLED2001)
     CKLED2001_update_led_control_registers(DRIVER_ADDR_1, 0);
 #        if defined(DRIVER_ADDR_2)
@@ -231,6 +260,27 @@ const rgb_matrix_driver_t rgb_matrix_driver = {
     .set_color_all = IS31FL3741_set_color_all,
 };
 
+#    elif defined(IS31FLCOMMON)
+static void flush(void) {
+    IS31FL_common_update_pwm_register(DRIVER_ADDR_1, 0);
+#        if defined(DRIVER_ADDR_2)
+    IS31FL_common_update_pwm_register(DRIVER_ADDR_2, 1);
+#            if defined(DRIVER_ADDR_3)
+    IS31FL_common_update_pwm_register(DRIVER_ADDR_3, 2);
+#                if defined(DRIVER_ADDR_4)
+    IS31FL_common_update_pwm_register(DRIVER_ADDR_4, 3);
+#                endif
+#            endif
+#        endif
+}
+
+const rgb_matrix_driver_t rgb_matrix_driver = {
+    .init = init,
+    .flush = flush,
+    .set_color = IS31FL_RGB_set_color,
+    .set_color_all = IS31FL_RGB_set_color_all,
+};
+
 #    elif defined(CKLED2001)
 static void flush(void) {
     CKLED2001_update_pwm_buffers(DRIVER_ADDR_1, 0);