is31fl3737/3741: add LED Matrix support (#22163)

8 files changed, 1316 insertions, 4 deletions

diff --git a/builddefs/common_features.mk b/builddefs/common_features.mk
index 8be4e40d33..5ac392c6a9 100644
--- a/builddefs/common_features.mk
+++ b/builddefs/common_features.mk
@@ -354,8 +354,7 @@ LED_MATRIX_DRIVER := aw20216s
 endif
 
 LED_MATRIX_ENABLE ?= no
-VALID_LED_MATRIX_TYPES := is31fl3218 is31fl3731 is31fl3733 is31fl3736 is31fl3742a is31fl3743a is31fl3745 is31fl3746a ckled2001 custom
-# TODO: is31fl3737 is31fl3741
+VALID_LED_MATRIX_TYPES := is31fl3218 is31fl3731 is31fl3733 is31fl3736 is31fl3737 is31fl3741 is31fl3742a is31fl3743a is31fl3745 is31fl3746a ckled2001 custom
 
 ifeq ($(strip $(LED_MATRIX_ENABLE)), yes)
     ifeq ($(filter $(LED_MATRIX_DRIVER),$(VALID_LED_MATRIX_TYPES)),)
@@ -405,6 +404,20 @@ endif
         QUANTUM_LIB_SRC += i2c_master.c
     endif
 
+    ifeq ($(strip $(LED_MATRIX_DRIVER)), is31fl3737)
+        OPT_DEFS += -DHAL_USE_I2C=TRUE
+        COMMON_VPATH += $(DRIVER_PATH)/led/issi
+        SRC += is31fl3737-simple.c
+        QUANTUM_LIB_SRC += i2c_master.c
+    endif
+
+    ifeq ($(strip $(LED_MATRIX_DRIVER)), is31fl3741)
+        OPT_DEFS += -DHAL_USE_I2C=TRUE
+        COMMON_VPATH += $(DRIVER_PATH)/led/issi
+        SRC += is31fl3741-simple.c
+        QUANTUM_LIB_SRC += i2c_master.c
+    endif
+
     ifeq ($(strip $(LED_MATRIX_DRIVER)), is31fl3742a)
         OPT_DEFS += -DIS31FLCOMMON -DHAL_USE_I2C=TRUE
         COMMON_VPATH += $(DRIVER_PATH)/led/issi
diff --git a/docs/reference_info_json.md b/docs/reference_info_json.md
index 6a79b11b34..7e5f11b7a7 100644
--- a/docs/reference_info_json.md
+++ b/docs/reference_info_json.md
@@ -329,7 +329,7 @@ Configures the [LED Matrix](feature_led_matrix.md) feature.
         * The centroid (geometric center) of the LEDs. Used for certain effects.
         * Default: `[112, 32]`
     * `driver` (Required)
-        * The driver to use. Must be one of `ckled2001`, `custom`, `is31fl3218`, `is31fl3731`, `is31fl3733`, `is31fl3736`, `is31fl3742a`, `is31fl3743a`, `is31fl3745`, `is31fl3746a`.
+        * The driver to use. Must be one of `ckled2001`, `custom`, `is31fl3218`, `is31fl3731`, `is31fl3733`, `is31fl3736`, `is31fl3737`, `is31fl3741`, `is31fl3742a`, `is31fl3743a`, `is31fl3745`, `is31fl3746a`.
     * `layout` (Required)
         * List of LED configuration dictionaries. Each dictionary contains:
             * `flags` (Required)
diff --git a/drivers/led/issi/is31fl3737-simple.c b/drivers/led/issi/is31fl3737-simple.c
new file mode 100644
index 0000000000..b25fbb5a56
--- /dev/null
+++ b/drivers/led/issi/is31fl3737-simple.c
@@ -0,0 +1,219 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2021 Doni Crosby
+ *
+ * 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 "is31fl3737-simple.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3737_COMMANDREGISTER 0xFD
+#define IS31FL3737_COMMANDREGISTER_WRITELOCK 0xFE
+#define IS31FL3737_INTERRUPTMASKREGISTER 0xF0
+#define IS31FL3737_INTERRUPTSTATUSREGISTER 0xF1
+
+#define IS31FL3737_PAGE_LEDCONTROL 0x00 // PG0
+#define IS31FL3737_PAGE_PWM 0x01        // PG1
+#define IS31FL3737_PAGE_AUTOBREATH 0x02 // PG2
+#define IS31FL3737_PAGE_FUNCTION 0x03   // PG3
+
+#define IS31FL3737_REG_CONFIGURATION 0x00 // PG3
+#define IS31FL3737_REG_GLOBALCURRENT 0x01 // PG3
+#define IS31FL3737_REG_RESET 0x11         // PG3
+#define IS31FL3737_REG_SWPULLUP 0x0F      // PG3
+#define IS31FL3737_REG_CSPULLUP 0x10      // PG3
+
+#ifndef IS31FL3737_I2C_TIMEOUT
+#    define IS31FL3737_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3737_I2C_PERSISTENCE
+#    define IS31FL3737_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3737_PWM_FREQUENCY
+#    define IS31FL3737_PWM_FREQUENCY IS31FL3737_PWM_FREQUENCY_8K4_HZ // PFS - IS31FL3737B only
+#endif
+
+#ifndef IS31FL3737_SWPULLUP
+#    define IS31FL3737_SWPULLUP IS31FL3737_PUR_0R
+#endif
+
+#ifndef IS31FL3737_CSPULLUP
+#    define IS31FL3737_CSPULLUP IS31FL3737_PUR_0R
+#endif
+
+#ifndef IS31FL3737_GLOBALCURRENT
+#    define IS31FL3737_GLOBALCURRENT 0xFF
+#endif
+
+// Transfer buffer for TWITransmitData()
+uint8_t g_twi_transfer_buffer[20];
+
+// These buffers match the IS31FL3737 PWM registers.
+// The control buffers match the PG0 LED On/Off registers.
+// 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 is31fl3737_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+
+uint8_t g_pwm_buffer[IS31FL3737_DRIVER_COUNT][192];
+bool    g_pwm_buffer_update_required[IS31FL3737_DRIVER_COUNT] = {false};
+
+uint8_t g_led_control_registers[IS31FL3737_DRIVER_COUNT][24]             = {0};
+bool    g_led_control_registers_update_required[IS31FL3737_DRIVER_COUNT] = {false};
+
+void is31fl3737_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    g_twi_transfer_buffer[0] = reg;
+    g_twi_transfer_buffer[1] = data;
+
+#if IS31FL3737_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3737_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3737_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3737_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // assumes PG1 is already selected
+
+    // transmit PWM registers in 12 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 < 192; i += 16) {
+        g_twi_transfer_buffer[0] = i;
+        // copy the data from i to i+15
+        // device will auto-increment register for data after the first byte
+        // thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer
+        memcpy(g_twi_transfer_buffer + 1, pwm_buffer + i, 16);
+
+#if IS31FL3737_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3737_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3737_I2C_TIMEOUT) == 0) break;
+        }
+#else
+        i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3737_I2C_TIMEOUT);
+#endif
+    }
+}
+
+void is31fl3737_init(uint8_t addr) {
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, shutdown is enabled last.
+    // Set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+
+    // Unlock the command register.
+    is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER_WRITELOCK, 0xC5);
+
+    // Select PG0
+    is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER, IS31FL3737_PAGE_LEDCONTROL);
+    // Turn off all LEDs.
+    for (int i = 0x00; i <= 0x17; i++) {
+        is31fl3737_write_register(addr, i, 0x00);
+    }
+
+    // Unlock the command register.
+    is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER_WRITELOCK, 0xC5);
+
+    // Select PG1
+    is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER, IS31FL3737_PAGE_PWM);
+    // Set PWM on all LEDs to 0
+    // No need to setup Breath registers to PWM as that is the default.
+    for (int i = 0x00; i <= 0xBF; i++) {
+        is31fl3737_write_register(addr, i, 0x00);
+    }
+
+    // Unlock the command register.
+    is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER_WRITELOCK, 0xC5);
+
+    // Select PG3
+    is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER, IS31FL3737_PAGE_FUNCTION);
+    // Set de-ghost pull-up resistors (SWx)
+    is31fl3737_write_register(addr, IS31FL3737_REG_SWPULLUP, IS31FL3737_SWPULLUP);
+    // Set de-ghost pull-down resistors (CSx)
+    is31fl3737_write_register(addr, IS31FL3737_REG_CSPULLUP, IS31FL3737_CSPULLUP);
+    // Set global current to maximum.
+    is31fl3737_write_register(addr, IS31FL3737_REG_GLOBALCURRENT, IS31FL3737_GLOBALCURRENT);
+    // Disable software shutdown.
+    is31fl3737_write_register(addr, IS31FL3737_REG_CONFIGURATION, ((IS31FL3737_PWM_FREQUENCY & 0b111) << 3) | 0x01);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3737_set_value(int index, uint8_t value) {
+    is31_led led;
+    if (index >= 0 && index < LED_MATRIX_LED_COUNT) {
+        memcpy_P(&led, (&g_is31_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.v] == value) {
+            return;
+        }
+        g_pwm_buffer[led.driver][led.v]          = value;
+        g_pwm_buffer_update_required[led.driver] = true;
+    }
+}
+
+void is31fl3737_set_value_all(uint8_t value) {
+    for (int i = 0; i < LED_MATRIX_LED_COUNT; i++) {
+        is31fl3737_set_value(i, value);
+    }
+}
+
+void is31fl3737_set_led_control_register(uint8_t index, bool value) {
+    is31_led led;
+    memcpy_P(&led, (&g_is31_leds[index]), sizeof(led));
+
+    uint8_t control_register = led.v / 8;
+    uint8_t bit_value        = led.v % 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[led.driver] = true;
+}
+
+void is31fl3737_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        // Firstly we need to unlock the command register and select PG1
+        is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER_WRITELOCK, 0xC5);
+        is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER, IS31FL3737_PAGE_PWM);
+
+        is31fl3737_write_pwm_buffer(addr, g_pwm_buffer[index]);
+        g_pwm_buffer_update_required[index] = false;
+    }
+}
+
+void is31fl3737_update_led_control_registers(uint8_t addr, uint8_t index) {
+    if (g_led_control_registers_update_required[index]) {
+        // Firstly we need to unlock the command register and select PG0
+        is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER_WRITELOCK, 0xC5);
+        is31fl3737_write_register(addr, IS31FL3737_COMMANDREGISTER, IS31FL3737_PAGE_LEDCONTROL);
+        for (int i = 0; i < 24; i++) {
+            is31fl3737_write_register(addr, i, g_led_control_registers[index][i]);
+        }
+        g_led_control_registers_update_required[index] = false;
+    }
+}
diff --git a/drivers/led/issi/is31fl3737-simple.h b/drivers/led/issi/is31fl3737-simple.h
new file mode 100644
index 0000000000..d242daa1d0
--- /dev/null
+++ b/drivers/led/issi/is31fl3737-simple.h
@@ -0,0 +1,256 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2021 Doni Crosby
+ *
+ * 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"
+
+// ======== DEPRECATED DEFINES - DO NOT USE ========
+#ifdef DRIVER_COUNT
+#    define IS31FL3737_DRIVER_COUNT DRIVER_COUNT
+#endif
+#ifdef ISSI_TIMEOUT
+#    define IS31FL3737_I2C_TIMEOUT ISSI_TIMEOUT
+#endif
+#ifdef ISSI_PERSISTENCE
+#    define IS31FL3737_I2C_PERSISTENCE ISSI_PERSISTENCE
+#endif
+#ifdef ISSI_PWM_FREQUENCY
+#    define IS31FL3737_PWM_FREQUENCY ISSI_PWM_FREQUENCY
+#endif
+#ifdef ISSI_SWPULLUP
+#    define IS31FL3737_SWPULLUP ISSI_SWPULLUP
+#endif
+#ifdef ISSI_CSPULLUP
+#    define IS31FL3737_CSPULLUP ISSI_CSPULLUP
+#endif
+#ifdef ISSI_GLOBALCURRENT
+#    define IS31FL3737_GLOBALCURRENT ISSI_GLOBALCURRENT
+#endif
+
+#define PUR_0R IS31FL3737_PUR_0R
+#define PUR_05KR IS31FL3737_PUR_05KR
+#define PUR_1KR IS31FL3737_PUR_1KR
+#define PUR_2KR IS31FL3737_PUR_2KR
+#define PUR_4KR IS31FL3737_PUR_4KR
+#define PUR_8KR IS31FL3737_PUR_8KR
+#define PUR_16KR IS31FL3737_PUR_16KR
+#define PUR_32KR IS31FL3737_PUR_32KR
+// ========
+
+#define IS31FL3737_I2C_ADDRESS_GND 0x50
+#define IS31FL3737_I2C_ADDRESS_SCL 0x55
+#define IS31FL3737_I2C_ADDRESS_SDA 0x5A
+#define IS31FL3737_I2C_ADDRESS_VCC 0x5F
+
+typedef struct is31_led {
+    uint8_t driver : 2;
+    uint8_t v;
+} __attribute__((packed)) is31_led;
+
+extern const is31_led PROGMEM g_is31_leds[LED_MATRIX_LED_COUNT];
+
+void is31fl3737_init(uint8_t addr);
+void is31fl3737_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void is31fl3737_set_value(int index, uint8_t value);
+void is31fl3737_set_value_all(uint8_t value);
+
+void is31fl3737_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 is31fl3737_update_pwm_buffers(uint8_t addr, uint8_t index);
+void is31fl3737_update_led_control_registers(uint8_t addr, uint8_t index);
+
+#define IS31FL3737_PUR_0R 0x00   // No PUR resistor
+#define IS31FL3737_PUR_05KR 0x01 // 0.5k Ohm resistor in t_NOL
+#define IS31FL3737_PUR_1KR 0x02  // 1.0k Ohm resistor in t_NOL
+#define IS31FL3737_PUR_2KR 0x03  // 2.0k Ohm resistor in t_NOL
+#define IS31FL3737_PUR_4KR 0x04  // 4.0k Ohm resistor in t_NOL
+#define IS31FL3737_PUR_8KR 0x05  // 8.0k Ohm resistor in t_NOL
+#define IS31FL3737_PUR_16KR 0x06 // 16k Ohm resistor in t_NOL
+#define IS31FL3737_PUR_32KR 0x07 // 32k Ohm resistor in t_NOL
+
+#define IS31FL3737_PWM_FREQUENCY_8K4_HZ 0b000
+#define IS31FL3737_PWM_FREQUENCY_4K2_HZ 0b001
+#define IS31FL3737_PWM_FREQUENCY_26K7_HZ 0b010
+#define IS31FL3737_PWM_FREQUENCY_2K1_HZ 0b011
+#define IS31FL3737_PWM_FREQUENCY_1K05_HZ 0b100
+
+#define A_1 0x00
+#define A_2 0x01
+#define A_3 0x02
+#define A_4 0x03
+#define A_5 0x04
+#define A_6 0x05
+#define A_7 0x08
+#define A_8 0x09
+#define A_9 0x0A
+#define A_10 0x0B
+#define A_11 0x0C
+#define A_12 0x0D
+
+#define B_1 0x10
+#define B_2 0x11
+#define B_3 0x12
+#define B_4 0x13
+#define B_5 0x14
+#define B_6 0x15
+#define B_7 0x18
+#define B_8 0x19
+#define B_9 0x1A
+#define B_10 0x1B
+#define B_11 0x1C
+#define B_12 0x1D
+
+#define C_1 0x20
+#define C_2 0x21
+#define C_3 0x22
+#define C_4 0x23
+#define C_5 0x24
+#define C_6 0x25
+#define C_7 0x28
+#define C_8 0x29
+#define C_9 0x2A
+#define C_10 0x2B
+#define C_11 0x2C
+#define C_12 0x2D
+
+#define D_1 0x30
+#define D_2 0x31
+#define D_3 0x32
+#define D_4 0x33
+#define D_5 0x34
+#define D_6 0x35
+#define D_7 0x38
+#define D_8 0x39
+#define D_9 0x3A
+#define D_10 0x3B
+#define D_11 0x3C
+#define D_12 0x3D
+
+#define E_1 0x40
+#define E_2 0x41
+#define E_3 0x42
+#define E_4 0x43
+#define E_5 0x44
+#define E_6 0x45
+#define E_7 0x48
+#define E_8 0x49
+#define E_9 0x4A
+#define E_10 0x4B
+#define E_11 0x4C
+#define E_12 0x4D
+
+#define F_1 0x50
+#define F_2 0x51
+#define F_3 0x52
+#define F_4 0x53
+#define F_5 0x54
+#define F_6 0x55
+#define F_7 0x58
+#define F_8 0x59
+#define F_9 0x5A
+#define F_10 0x5B
+#define F_11 0x5C
+#define F_12 0x5D
+
+#define G_1 0x60
+#define G_2 0x61
+#define G_3 0x62
+#define G_4 0x63
+#define G_5 0x64
+#define G_6 0x65
+#define G_7 0x68
+#define G_8 0x69
+#define G_9 0x6A
+#define G_10 0x6B
+#define G_11 0x6C
+#define G_12 0x6D
+
+#define H_1 0x70
+#define H_2 0x71
+#define H_3 0x72
+#define H_4 0x73
+#define H_5 0x74
+#define H_6 0x75
+#define H_7 0x78
+#define H_8 0x79
+#define H_9 0x7A
+#define H_10 0x7B
+#define H_11 0x7C
+#define H_12 0x7D
+
+#define I_1 0x80
+#define I_2 0x81
+#define I_3 0x82
+#define I_4 0x83
+#define I_5 0x84
+#define I_6 0x85
+#define I_7 0x88
+#define I_8 0x89
+#define I_9 0x8A
+#define I_10 0x8B
+#define I_11 0x8C
+#define I_12 0x8D
+
+#define J_1 0x90
+#define J_2 0x91
+#define J_3 0x92
+#define J_4 0x93
+#define J_5 0x94
+#define J_6 0x95
+#define J_7 0x98
+#define J_8 0x99
+#define J_9 0x9A
+#define J_10 0x9B
+#define J_11 0x9C
+#define J_12 0x9D
+
+#define K_1 0xA0
+#define K_2 0xA1
+#define K_3 0xA2
+#define K_4 0xA3
+#define K_5 0xA4
+#define K_6 0xA5
+#define K_7 0xA8
+#define K_8 0xA9
+#define K_9 0xAA
+#define K_10 0xAB
+#define K_11 0xAC
+#define K_12 0xAD
+
+#define L_1 0xB0
+#define L_2 0xB1
+#define L_3 0xB2
+#define L_4 0xB3
+#define L_5 0xB4
+#define L_6 0xB5
+#define L_7 0xB8
+#define L_8 0xB9
+#define L_9 0xBA
+#define L_10 0xBB
+#define L_11 0xBC
+#define L_12 0xBD
diff --git a/drivers/led/issi/is31fl3741-simple.c b/drivers/led/issi/is31fl3741-simple.c
new file mode 100644
index 0000000000..7df3030131
--- /dev/null
+++ b/drivers/led/issi/is31fl3741-simple.c
@@ -0,0 +1,253 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ *
+ * 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 "is31fl3741-simple.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3741_COMMANDREGISTER 0xFD
+#define IS31FL3741_COMMANDREGISTER_WRITELOCK 0xFE
+#define IS31FL3741_INTERRUPTMASKREGISTER 0xF0
+#define IS31FL3741_INTERRUPTSTATUSREGISTER 0xF1
+#define IS31FL3741_IDREGISTER 0xFC
+
+#define IS31FL3741_PAGE_PWM0 0x00      // PG0
+#define IS31FL3741_PAGE_PWM1 0x01      // PG1
+#define IS31FL3741_PAGE_SCALING_0 0x02 // PG2
+#define IS31FL3741_PAGE_SCALING_1 0x03 // PG3
+#define IS31FL3741_PAGE_FUNCTION 0x04  // PG4
+
+#define IS31FL3741_REG_CONFIGURATION 0x00 // PG4
+#define IS31FL3741_REG_GLOBALCURRENT 0x01 // PG4
+#define IS31FL3741_REG_PULLDOWNUP 0x02    // PG4
+#define IS31FL3741_REG_PWM_FREQUENCY 0x36 // PG4
+#define IS31FL3741_REG_RESET 0x3F         // PG4
+
+#ifndef IS31FL3741_I2C_TIMEOUT
+#    define IS31FL3741_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3741_I2C_PERSISTENCE
+#    define IS31FL3741_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3741_CONFIGURATION
+#    define IS31FL3741_CONFIGURATION 0x01
+#endif
+
+#ifndef IS31FL3741_PWM_FREQUENCY
+#    define IS31FL3741_PWM_FREQUENCY IS31FL3741_PWM_FREQUENCY_29K_HZ
+#endif
+
+#ifndef IS31FL3741_SWPULLUP
+#    define IS31FL3741_SWPULLUP IS31FL3741_PUR_32KR
+#endif
+
+#ifndef IS31FL3741_CSPULLUP
+#    define IS31FL3741_CSPULLUP IS31FL3741_PUR_32KR
+#endif
+
+#ifndef IS31FL3741_GLOBALCURRENT
+#    define IS31FL3741_GLOBALCURRENT 0xFF
+#endif
+
+#define IS31FL3741_MAX_LEDS 351
+
+// Transfer buffer for TWITransmitData()
+uint8_t g_twi_transfer_buffer[20] = {0xFF};
+
+// These buffers match the IS31FL3741 and IS31FL3741A PWM registers.
+// The scaling buffers match the PG2 and PG3 LED On/Off registers.
+// 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 is31fl3741_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+uint8_t g_pwm_buffer[IS31FL3741_DRIVER_COUNT][IS31FL3741_MAX_LEDS];
+bool    g_pwm_buffer_update_required[IS31FL3741_DRIVER_COUNT]        = {false};
+bool    g_scaling_registers_update_required[IS31FL3741_DRIVER_COUNT] = {false};
+
+uint8_t g_scaling_registers[IS31FL3741_DRIVER_COUNT][IS31FL3741_MAX_LEDS];
+
+void is31fl3741_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    g_twi_transfer_buffer[0] = reg;
+    g_twi_transfer_buffer[1] = data;
+
+#if IS31FL3741_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3741_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3741_I2C_TIMEOUT);
+#endif
+}
+
+bool is31fl3741_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // Assume PG0 is already selected
+
+    for (int i = 0; i < 342; i += 18) {
+        if (i == 180) {
+            // unlock the command register and select PG1
+            is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER_WRITELOCK, 0xC5);
+            is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER, IS31FL3741_PAGE_PWM1);
+        }
+
+        g_twi_transfer_buffer[0] = i % 180;
+        memcpy(g_twi_transfer_buffer + 1, pwm_buffer + i, 18);
+
+#if IS31FL3741_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 19, IS31FL3741_I2C_TIMEOUT) != 0) {
+                return false;
+            }
+        }
+#else
+        if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 19, IS31FL3741_I2C_TIMEOUT) != 0) {
+            return false;
+        }
+#endif
+    }
+
+    // transfer the left cause the total number is 351
+    g_twi_transfer_buffer[0] = 162;
+    memcpy(g_twi_transfer_buffer + 1, pwm_buffer + 342, 9);
+
+#if IS31FL3741_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 10, IS31FL3741_I2C_TIMEOUT) != 0) {
+            return false;
+        }
+    }
+#else
+    if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 10, IS31FL3741_I2C_TIMEOUT) != 0) {
+        return false;
+    }
+#endif
+
+    return true;
+}
+
+void is31fl3741_init(uint8_t addr) {
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, shutdown is enabled last.
+    // Set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+    // Unlock the command register.
+
+    // Unlock the command register.
+    is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER_WRITELOCK, 0xC5);
+
+    // Select PG4
+    is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER, IS31FL3741_PAGE_FUNCTION);
+
+    // Set to Normal operation
+    is31fl3741_write_register(addr, IS31FL3741_REG_CONFIGURATION, IS31FL3741_CONFIGURATION);
+
+    // Set Golbal Current Control Register
+    is31fl3741_write_register(addr, IS31FL3741_REG_GLOBALCURRENT, IS31FL3741_GLOBALCURRENT);
+    // Set Pull up & Down for SWx CSy
+    is31fl3741_write_register(addr, IS31FL3741_REG_PULLDOWNUP, ((IS31FL3741_CSPULLUP << 4) | IS31FL3741_SWPULLUP));
+    // Set PWM frequency
+    is31fl3741_write_register(addr, IS31FL3741_REG_PWM_FREQUENCY, (IS31FL3741_PWM_FREQUENCY & 0b1111));
+
+    // is31fl3741_update_led_scaling_registers(addr, 0xFF, 0xFF, 0xFF);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3741_set_value(int index, uint8_t value) {
+    is31_led led;
+    if (index >= 0 && index < LED_MATRIX_LED_COUNT) {
+        memcpy_P(&led, (&g_is31_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.v] == value) {
+            return;
+        }
+        g_pwm_buffer_update_required[led.driver] = true;
+        g_pwm_buffer[led.driver][led.v]          = value;
+    }
+}
+
+void is31fl3741_set_value_all(uint8_t value) {
+    for (int i = 0; i < LED_MATRIX_LED_COUNT; i++) {
+        is31fl3741_set_value(i, value);
+    }
+}
+
+void is31fl3741_set_led_control_register(uint8_t index, bool value) {
+    is31_led led;
+    memcpy_P(&led, (&g_is31_leds[index]), sizeof(led));
+
+    if (value) {
+        g_scaling_registers[led.driver][led.v] = 0xFF;
+    } else {
+        g_scaling_registers[led.driver][led.v] = 0x00;
+    }
+
+    g_scaling_registers_update_required[led.driver] = true;
+}
+
+void is31fl3741_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        // unlock the command register and select PG2
+        is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER_WRITELOCK, 0xC5);
+        is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER, IS31FL3741_PAGE_PWM0);
+
+        is31fl3741_write_pwm_buffer(addr, g_pwm_buffer[index]);
+    }
+
+    g_pwm_buffer_update_required[index] = false;
+}
+
+void is31fl3741_set_pwm_buffer(const is31_led *pled, uint8_t value) {
+    g_pwm_buffer[pled->driver][pled->v] = value;
+
+    g_pwm_buffer_update_required[pled->driver] = true;
+}
+
+void is31fl3741_update_led_control_registers(uint8_t addr, uint8_t index) {
+    if (g_scaling_registers_update_required[index]) {
+        // unlock the command register and select PG2
+        is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER_WRITELOCK, 0xC5);
+        is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER, IS31FL3741_PAGE_SCALING_0);
+
+        // CS1_SW1 to CS30_SW6 are on PG2
+        for (int i = CS1_SW1; i <= CS30_SW6; ++i) {
+            is31fl3741_write_register(addr, i, g_scaling_registers[index][i]);
+        }
+
+        // unlock the command register and select PG3
+        is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER_WRITELOCK, 0xC5);
+        is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER, IS31FL3741_PAGE_SCALING_1);
+
+        // CS1_SW7 to CS39_SW9 are on PG3
+        for (int i = CS1_SW7; i <= CS39_SW9; ++i) {
+            is31fl3741_write_register(addr, i - CS1_SW7, g_scaling_registers[index][i]);
+        }
+
+        g_scaling_registers_update_required[index] = false;
+    }
+}
+
+void is31fl3741_set_scaling_registers(const is31_led *pled, uint8_t value) {
+    g_scaling_registers[pled->driver][pled->v] = value;
+
+    g_scaling_registers_update_required[pled->driver] = true;
+}
diff --git a/drivers/led/issi/is31fl3741-simple.h b/drivers/led/issi/is31fl3741-simple.h
new file mode 100644
index 0000000000..8bca066ad3
--- /dev/null
+++ b/drivers/led/issi/is31fl3741-simple.h
@@ -0,0 +1,471 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ *
+ * 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"
+
+// ======== DEPRECATED DEFINES - DO NOT USE ========
+#ifdef DRIVER_COUNT
+#    define IS31FL3741_DRIVER_COUNT DRIVER_COUNT
+#endif
+#ifdef ISSI_TIMEOUT
+#    define IS31FL3741_I2C_TIMEOUT ISSI_TIMEOUT
+#endif
+#ifdef ISSI_PERSISTENCE
+#    define IS31FL3741_I2C_PERSISTENCE ISSI_PERSISTENCE
+#endif
+#ifdef ISSI_CONFIGURATION
+#    define IS31FL3741_CONFIGURATION ISSI_CONFIGURATION
+#endif
+#ifdef ISSI_SWPULLUP
+#    define IS31FL3741_SWPULLUP ISSI_SWPULLUP
+#endif
+#ifdef ISSI_CSPULLUP
+#    define IS31FL3741_CSPULLUP ISSI_CSPULLUP
+#endif
+#ifdef ISSI_GLOBALCURRENT
+#    define IS31FL3741_GLOBALCURRENT ISSI_GLOBALCURRENT
+#endif
+
+#define PUR_0R IS31FL3741_PUR_0R
+#define PUR_05KR IS31FL3741_PUR_05KR
+#define PUR_1KR IS31FL3741_PUR_1KR
+#define PUR_2KR IS31FL3741_PUR_2KR
+#define PUR_4KR IS31FL3741_PUR_4KR
+#define PUR_8KR IS31FL3741_PUR_8KR
+#define PUR_16KR IS31FL3741_PUR_16KR
+#define PUR_32KR IS31FL3741_PUR_32KR
+// ========
+
+#define IS31FL3741_I2C_ADDRESS_GND 0x30
+#define IS31FL3741_I2C_ADDRESS_SCL 0x31
+#define IS31FL3741_I2C_ADDRESS_SDA 0x32
+#define IS31FL3741_I2C_ADDRESS_VCC 0x33
+
+typedef struct is31_led {
+    uint32_t driver : 2;
+    uint32_t v : 10;
+} __attribute__((packed)) is31_led;
+
+extern const is31_led PROGMEM g_is31_leds[RGB_MATRIX_LED_COUNT];
+
+void is31fl3741_init(uint8_t addr);
+void is31fl3741_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+bool is31fl3741_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void is31fl3741_set_value(int index, uint8_t value);
+void is31fl3741_set_value_all(uint8_t value);
+
+void is31fl3741_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 is31fl3741_update_pwm_buffers(uint8_t addr, uint8_t index);
+void is31fl3741_update_led_control_registers(uint8_t addr, uint8_t index);
+void is31fl3741_set_scaling_registers(const is31_led *pled, uint8_t value);
+
+void is31fl3741_set_pwm_buffer(const is31_led *pled, uint8_t value);
+
+#define IS31FL3741_PUR_0R 0x00   // No PUR resistor
+#define IS31FL3741_PUR_05KR 0x01 // 0.5k Ohm resistor
+#define IS31FL3741_PUR_1KR 0x02  // 1.0k Ohm resistor
+#define IS31FL3741_PUR_2KR 0x03  // 2.0k Ohm resistor
+#define IS31FL3741_PUR_4KR 0x04  // 4.0k Ohm resistor
+#define IS31FL3741_PUR_8KR 0x05  // 8.0k Ohm resistor
+#define IS31FL3741_PUR_16KR 0x06 // 16k Ohm resistor
+#define IS31FL3741_PUR_32KR 0x07 // 32k Ohm resistor
+
+#define IS31FL3741_PWM_FREQUENCY_29K_HZ 0b0000
+#define IS31FL3741_PWM_FREQUENCY_3K6_HZ 0b0011
+#define IS31FL3741_PWM_FREQUENCY_1K8_HZ 0b0111
+#define IS31FL3741_PWM_FREQUENCY_900_HZ 0b1011
+
+#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
+
+#define CS1_SW7 0xB4
+#define CS2_SW7 0xB5
+#define CS3_SW7 0xB6
+#define CS4_SW7 0xB7
+#define CS5_SW7 0xB8
+#define CS6_SW7 0xB9
+#define CS7_SW7 0xBA
+#define CS8_SW7 0xBB
+#define CS9_SW7 0xBC
+#define CS10_SW7 0xBD
+#define CS11_SW7 0xBE
+#define CS12_SW7 0xBF
+#define CS13_SW7 0xC0
+#define CS14_SW7 0xC1
+#define CS15_SW7 0xC2
+#define CS16_SW7 0xC3
+#define CS17_SW7 0xC4
+#define CS18_SW7 0xC5
+#define CS19_SW7 0xC6
+#define CS20_SW7 0xC7
+#define CS21_SW7 0xC8
+#define CS22_SW7 0xC9
+#define CS23_SW7 0xCA
+#define CS24_SW7 0xCB
+#define CS25_SW7 0xCC
+#define CS26_SW7 0xCD
+#define CS27_SW7 0xCE
+#define CS28_SW7 0xCF
+#define CS29_SW7 0xD0
+#define CS30_SW7 0xD1
+
+#define CS1_SW8 0xD2
+#define CS2_SW8 0xD3
+#define CS3_SW8 0xD4
+#define CS4_SW8 0xD5
+#define CS5_SW8 0xD6
+#define CS6_SW8 0xD7
+#define CS7_SW8 0xD8
+#define CS8_SW8 0xD9
+#define CS9_SW8 0xDA
+#define CS10_SW8 0xDB
+#define CS11_SW8 0xDC
+#define CS12_SW8 0xDD
+#define CS13_SW8 0xDE
+#define CS14_SW8 0xDF
+#define CS15_SW8 0xE0
+#define CS16_SW8 0xE1
+#define CS17_SW8 0xE2
+#define CS18_SW8 0xE3
+#define CS19_SW8 0xE4
+#define CS20_SW8 0xE5
+#define CS21_SW8 0xE6
+#define CS22_SW8 0xE7
+#define CS23_SW8 0xE8
+#define CS24_SW8 0xE9
+#define CS25_SW8 0xEA
+#define CS26_SW8 0xEB
+#define CS27_SW8 0xEC
+#define CS28_SW8 0xED
+#define CS29_SW8 0xEE
+#define CS30_SW8 0xEF
+
+#define CS1_SW9 0xF0
+#define CS2_SW9 0xF1
+#define CS3_SW9 0xF2
+#define CS4_SW9 0xF3
+#define CS5_SW9 0xF4
+#define CS6_SW9 0xF5
+#define CS7_SW9 0xF6
+#define CS8_SW9 0xF7
+#define CS9_SW9 0xF8
+#define CS10_SW9 0xF9
+#define CS11_SW9 0xFA
+#define CS12_SW9 0xFB
+#define CS13_SW9 0xFC
+#define CS14_SW9 0xFD
+#define CS15_SW9 0xFE
+#define CS16_SW9 0xFF
+#define CS17_SW9 0x100
+#define CS18_SW9 0x101
+#define CS19_SW9 0x102
+#define CS20_SW9 0x103
+#define CS21_SW9 0x104
+#define CS22_SW9 0x105
+#define CS23_SW9 0x106
+#define CS24_SW9 0x107
+#define CS25_SW9 0x108
+#define CS26_SW9 0x109
+#define CS27_SW9 0x10A
+#define CS28_SW9 0x10B
+#define CS29_SW9 0x10C
+#define CS30_SW9 0x10D
+
+#define CS31_SW1 0x10E
+#define CS32_SW1 0x10F
+#define CS33_SW1 0x110
+#define CS34_SW1 0x111
+#define CS35_SW1 0x112
+#define CS36_SW1 0x113
+#define CS37_SW1 0x114
+#define CS38_SW1 0x115
+#define CS39_SW1 0x116
+
+#define CS31_SW2 0x117
+#define CS32_SW2 0x118
+#define CS33_SW2 0x119
+#define CS34_SW2 0x11A
+#define CS35_SW2 0x11B
+#define CS36_SW2 0x11C
+#define CS37_SW2 0x11D
+#define CS38_SW2 0x11E
+#define CS39_SW2 0x11F
+
+#define CS31_SW3 0x120
+#define CS32_SW3 0x121
+#define CS33_SW3 0x122
+#define CS34_SW3 0x123
+#define CS35_SW3 0x124
+#define CS36_SW3 0x125
+#define CS37_SW3 0x126
+#define CS38_SW3 0x127
+#define CS39_SW3 0x128
+
+#define CS31_SW4 0x129
+#define CS32_SW4 0x12A
+#define CS33_SW4 0x12B
+#define CS34_SW4 0x12C
+#define CS35_SW4 0x12D
+#define CS36_SW4 0x12E
+#define CS37_SW4 0x12F
+#define CS38_SW4 0x130
+#define CS39_SW4 0x131
+
+#define CS31_SW5 0x132
+#define CS32_SW5 0x133
+#define CS33_SW5 0x134
+#define CS34_SW5 0x135
+#define CS35_SW5 0x136
+#define CS36_SW5 0x137
+#define CS37_SW5 0x138
+#define CS38_SW5 0x139
+#define CS39_SW5 0x13A
+
+#define CS31_SW6 0x13B
+#define CS32_SW6 0x13C
+#define CS33_SW6 0x13D
+#define CS34_SW6 0x13E
+#define CS35_SW6 0x13F
+#define CS36_SW6 0x140
+#define CS37_SW6 0x141
+#define CS38_SW6 0x142
+#define CS39_SW6 0x143
+
+#define CS31_SW7 0x144
+#define CS32_SW7 0x145
+#define CS33_SW7 0x146
+#define CS34_SW7 0x147
+#define CS35_SW7 0x148
+#define CS36_SW7 0x149
+#define CS37_SW7 0x14A
+#define CS38_SW7 0x14B
+#define CS39_SW7 0x14C
+
+#define CS31_SW8 0x14D
+#define CS32_SW8 0x14E
+#define CS33_SW8 0x14F
+#define CS34_SW8 0x150
+#define CS35_SW8 0x151
+#define CS36_SW8 0x152
+#define CS37_SW8 0x153
+#define CS38_SW8 0x154
+#define CS39_SW8 0x155
+
+#define CS31_SW9 0x156
+#define CS32_SW9 0x157
+#define CS33_SW9 0x158
+#define CS34_SW9 0x159
+#define CS35_SW9 0x15A
+#define CS36_SW9 0x15B
+#define CS37_SW9 0x15C
+#define CS38_SW9 0x15D
+#define CS39_SW9 0x15E
diff --git a/quantum/led_matrix/led_matrix.h b/quantum/led_matrix/led_matrix.h
index 316585b1fe..47803d2423 100644
--- a/quantum/led_matrix/led_matrix.h
+++ b/quantum/led_matrix/led_matrix.h
@@ -36,6 +36,12 @@
 #ifdef LED_MATRIX_IS31FL3736
 #    include "is31fl3736-simple.h"
 #endif
+#ifdef LED_MATRIX_IS31FL3737
+#    include "is31fl3737-simple.h"
+#endif
+#ifdef LED_MATRIX_IS31FL3741
+#    include "is31fl3741-simple.h"
+#endif
 #if defined(IS31FLCOMMON)
 #    include "is31flcommon.h"
 #endif
diff --git a/quantum/led_matrix/led_matrix_drivers.c b/quantum/led_matrix/led_matrix_drivers.c
index 27c53a223a..771ce820af 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(LED_MATRIX_IS31FL3218) || defined(LED_MATRIX_IS31FL3731) || defined(LED_MATRIX_IS31FL3733) || defined(LED_MATRIX_IS31FL3736) || defined(IS31FLCOMMON) || defined(LED_MATRIX_CKLED2001)
+#if defined(LED_MATRIX_IS31FL3218) || defined(LED_MATRIX_IS31FL3731) || defined(LED_MATRIX_IS31FL3733) || defined(LED_MATRIX_IS31FL3736) || defined(LED_MATRIX_IS31FL3737) || defined(LED_MATRIX_IS31FL3741) || defined(IS31FLCOMMON) || defined(LED_MATRIX_CKLED2001)
 #    include "i2c_master.h"
 
 static void init(void) {
@@ -82,6 +82,30 @@ static void init(void) {
 #            endif
 #        endif
 
+#    elif defined(LED_MATRIX_IS31FL3737)
+    is31fl3737_init(LED_DRIVER_ADDR_1);
+#        if defined(LED_DRIVER_ADDR_2)
+    is31fl3737_init(LED_DRIVER_ADDR_2);
+#            if defined(LED_DRIVER_ADDR_3)
+    is31fl3737_init(LED_DRIVER_ADDR_3);
+#                if defined(LED_DRIVER_ADDR_4)
+    is31fl3737_init(LED_DRIVER_ADDR_4);
+#                endif
+#            endif
+#        endif
+
+#    elif defined(LED_MATRIX_IS31FL3741)
+    is31fl3741_init(LED_DRIVER_ADDR_1);
+#        if defined(LED_DRIVER_ADDR_2)
+    is31fl3741_init(LED_DRIVER_ADDR_2);
+#            if defined(LED_DRIVER_ADDR_3)
+    is31fl3741_init(LED_DRIVER_ADDR_3);
+#                if defined(LED_DRIVER_ADDR_4)
+    is31fl3741_init(LED_DRIVER_ADDR_4);
+#                endif
+#            endif
+#        endif
+
 #    elif defined(IS31FLCOMMON)
     IS31FL_common_init(DRIVER_ADDR_1, ISSI_SSR_1);
 #        if defined(LED_DRIVER_ADDR_2)
@@ -120,6 +144,10 @@ static void init(void) {
         is31fl3733_set_led_control_register(index, true);
 #    elif defined(LED_MATRIX_IS31FL3736)
         is31fl3736_set_led_control_register(index, true);
+#    elif defined(LED_MATRIX_IS31FL3737)
+        is31fl3737_set_led_control_register(index, true);
+#    elif defined(LED_MATRIX_IS31FL3741)
+        is31fl3741_set_led_control_register(index, true);
 #    elif defined(IS31FLCOMMON)
         IS31FL_simple_set_scaling_buffer(index, true);
 #    elif defined(LED_MATRIX_CKLED2001)
@@ -167,6 +195,30 @@ static void init(void) {
 #            endif
 #        endif
 
+#    elif defined(LED_MATRIX_IS31FL3737)
+    is31fl3737_update_led_control_registers(LED_DRIVER_ADDR_1, 0);
+#        if defined(LED_DRIVER_ADDR_2)
+    is31fl3737_update_led_control_registers(LED_DRIVER_ADDR_2, 1);
+#            if defined(LED_DRIVER_ADDR_3)
+    is31fl3737_update_led_control_registers(LED_DRIVER_ADDR_3, 2);
+#                if defined(LED_DRIVER_ADDR_4)
+    is31fl3737_update_led_control_registers(LED_DRIVER_ADDR_4, 3);
+#                endif
+#            endif
+#        endif
+
+#    elif defined(LED_MATRIX_IS31FL3741)
+    is31fl3741_update_led_control_registers(LED_DRIVER_ADDR_1, 0);
+#        if defined(LED_DRIVER_ADDR_2)
+    is31fl3741_update_led_control_registers(LED_DRIVER_ADDR_2, 1);
+#            if defined(LED_DRIVER_ADDR_3)
+    is31fl3741_update_led_control_registers(LED_DRIVER_ADDR_3, 2);
+#                if defined(LED_DRIVER_ADDR_4)
+    is31fl3741_update_led_control_registers(LED_DRIVER_ADDR_4, 3);
+#                endif
+#            endif
+#        endif
+
 #    elif defined(IS31FLCOMMON)
 #        ifdef ISSI_MANUAL_SCALING
     IS31FL_set_manual_scaling_buffer();
@@ -270,6 +322,48 @@ const led_matrix_driver_t led_matrix_driver = {
     .set_value_all = is31fl3736_set_value_all,
 };
 
+#    elif defined(LED_MATRIX_IS31FL3737)
+static void flush(void) {
+    is31fl3737_update_pwm_buffers(LED_DRIVER_ADDR_1, 0);
+#        if defined(LED_DRIVER_ADDR_2)
+    is31fl3737_update_pwm_buffers(LED_DRIVER_ADDR_2, 1);
+#            if defined(LED_DRIVER_ADDR_3)
+    is31fl3737_update_pwm_buffers(LED_DRIVER_ADDR_3, 2);
+#                if defined(LED_DRIVER_ADDR_4)
+    is31fl3737_update_pwm_buffers(LED_DRIVER_ADDR_4, 3);
+#                endif
+#            endif
+#        endif
+}
+
+const led_matrix_driver_t led_matrix_driver = {
+    .init = init,
+    .flush = flush,
+    .set_value = is31fl3737_set_value,
+    .set_value_all = is31fl3737_set_value_all,
+};
+
+#    elif defined(LED_MATRIX_IS31FL3741)
+static void flush(void) {
+    is31fl3741_update_pwm_buffers(LED_DRIVER_ADDR_1, 0);
+#        if defined(LED_DRIVER_ADDR_2)
+    is31fl3741_update_pwm_buffers(LED_DRIVER_ADDR_2, 1);
+#            if defined(LED_DRIVER_ADDR_3)
+    is31fl3741_update_pwm_buffers(LED_DRIVER_ADDR_3, 2);
+#                if defined(LED_DRIVER_ADDR_4)
+    is31fl3741_update_pwm_buffers(LED_DRIVER_ADDR_4, 3);
+#                endif
+#            endif
+#        endif
+}
+
+const led_matrix_driver_t led_matrix_driver = {
+    .init = init,
+    .flush = flush,
+    .set_value = is31fl3741_set_value,
+    .set_value_all = is31fl3741_set_value_all,
+};
+
 #    elif defined(IS31FLCOMMON)
 static void flush(void) {
     IS31FL_common_update_pwm_register(DRIVER_ADDR_1, 0);