LED drivers: extract IS31FL3745 from IS31COMMON (#22636)

5 files changed, 798 insertions, 88 deletions

diff --git a/drivers/led/issi/is31fl3745-simple.c b/drivers/led/issi/is31fl3745-simple.c
new file mode 100644
index 0000000000..46b41fe3d4
--- /dev/null
+++ b/drivers/led/issi/is31fl3745-simple.c
@@ -0,0 +1,216 @@
+#include "is31fl3745-simple.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3745_PWM_REGISTER_COUNT 144
+#define IS31FL3745_SCALING_REGISTER_COUNT 144
+
+#ifndef IS31FL3745_I2C_TIMEOUT
+#    define IS31FL3745_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3745_I2C_PERSISTENCE
+#    define IS31FL3745_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3745_CONFIGURATION
+#    define IS31FL3745_CONFIGURATION 0x31
+#endif
+
+#ifndef IS31FL3745_SW_PULLDOWN
+#    define IS31FL3745_SW_PULLDOWN IS31FL3745_PDR_2K_OHM_SW_OFF
+#endif
+
+#ifndef IS31FL3745_CS_PULLUP
+#    define IS31FL3745_CS_PULLUP IS31FL3745_PUR_2K_OHM_CS_OFF
+#endif
+
+#ifndef IS31FL3745_GLOBAL_CURRENT
+#    define IS31FL3745_GLOBAL_CURRENT 0xFF
+#endif
+
+#ifndef IS31FL3745_SYNC_1
+#    define IS31FL3745_SYNC_1 IS31FL3745_SYNC_NONE
+#endif
+#ifndef IS31FL3745_SYNC_2
+#    define IS31FL3745_SYNC_2 IS31FL3745_SYNC_NONE
+#endif
+#ifndef IS31FL3745_SYNC_3
+#    define IS31FL3745_SYNC_3 IS31FL3745_SYNC_NONE
+#endif
+#ifndef IS31FL3745_SYNC_4
+#    define IS31FL3745_SYNC_4 IS31FL3745_SYNC_NONE
+#endif
+
+uint8_t i2c_transfer_buffer[20] = {0xFF};
+
+uint8_t g_pwm_buffer[IS31FL3745_DRIVER_COUNT][IS31FL3745_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[IS31FL3745_DRIVER_COUNT]        = {false};
+bool    g_scaling_registers_update_required[IS31FL3745_DRIVER_COUNT] = {false};
+
+uint8_t g_scaling_registers[IS31FL3745_DRIVER_COUNT][IS31FL3745_SCALING_REGISTER_COUNT];
+
+void is31fl3745_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if IS31FL3745_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3745_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3745_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3745_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3745_select_page(uint8_t addr, uint8_t page) {
+    is31fl3745_write_register(addr, IS31FL3745_REG_COMMAND_WRITE_LOCK, IS31FL3745_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3745_write_register(addr, IS31FL3745_REG_COMMAND, page);
+}
+
+void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // Assumes page 0 is already selected.
+    // If any of the transactions fails function returns false.
+    // Transmit PWM registers in 12 transfers of 16 bytes.
+    // i2c_transfer_buffer[] is 20 bytes
+
+    // Iterate over the pwm_buffer contents at 16 byte intervals.
+    for (int i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i += 16) {
+        i2c_transfer_buffer[0] = i + 1;
+        // 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(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
+
+#if IS31FL3745_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3745_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3745_I2C_TIMEOUT) != 0) break;
+        }
+#else
+        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3745_I2C_TIMEOUT);
+#endif
+    }
+}
+
+void is31fl3745_init_drivers(void) {
+    i2c_init();
+
+    is31fl3745_init(IS31FL3745_I2C_ADDRESS_1, IS31FL3745_SYNC_1);
+#if defined(IS31FL3745_I2C_ADDRESS_2)
+    is31fl3745_init(IS31FL3745_I2C_ADDRESS_2, IS31FL3745_SYNC_2);
+#    if defined(IS31FL3745_I2C_ADDRESS_3)
+    is31fl3745_init(IS31FL3745_I2C_ADDRESS_3, IS31FL3745_SYNC_3);
+#        if defined(IS31FL3745_I2C_ADDRESS_4)
+    is31fl3745_init(IS31FL3745_I2C_ADDRESS_4, IS31FL3745_SYNC_4);
+#        endif
+#    endif
+#endif
+
+    for (int i = 0; i < IS31FL3745_LED_COUNT; i++) {
+        is31fl3745_set_scaling_register(i, 0xFF);
+    }
+
+    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3745_I2C_ADDRESS_2)
+    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3745_I2C_ADDRESS_3)
+    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3745_I2C_ADDRESS_4)
+    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
+
+void is31fl3745_init(uint8_t addr, uint8_t sync) {
+    // 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.
+
+    is31fl3745_select_page(addr, IS31FL3745_COMMAND_SCALING);
+
+    // Turn off all LEDs.
+    for (int i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
+        is31fl3745_write_register(addr, i + 1, 0x00);
+    }
+
+    is31fl3745_select_page(addr, IS31FL3745_COMMAND_PWM);
+
+    for (int i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i++) {
+        is31fl3745_write_register(addr, i + 1, 0x00);
+    }
+
+    is31fl3745_select_page(addr, IS31FL3745_COMMAND_FUNCTION);
+
+    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_PULLDOWNUP, (IS31FL3745_SW_PULLDOWN << 4) | IS31FL3745_CS_PULLUP);
+    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3745_GLOBAL_CURRENT);
+    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
+    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_CONFIGURATION, IS31FL3745_CONFIGURATION);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3745_set_value(int index, uint8_t value) {
+    is31fl3745_led_t led;
+    if (index >= 0 && index < IS31FL3745_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3745_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 is31fl3745_set_value_all(uint8_t value) {
+    for (int i = 0; i < IS31FL3745_LED_COUNT; i++) {
+        is31fl3745_set_value(i, value);
+    }
+}
+
+void is31fl3745_set_scaling_register(uint8_t index, uint8_t value) {
+    is31fl3745_led_t led;
+    memcpy_P(&led, (&g_is31fl3745_leds[index]), sizeof(led));
+
+    g_scaling_registers[led.driver][led.v] = value;
+
+    g_scaling_registers_update_required[led.driver] = true;
+}
+
+void is31fl3745_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        is31fl3745_select_page(addr, IS31FL3745_COMMAND_PWM);
+
+        is31fl3745_write_pwm_buffer(addr, g_pwm_buffer[index]);
+    }
+
+    g_pwm_buffer_update_required[index] = false;
+}
+
+void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index) {
+    if (g_scaling_registers_update_required[index]) {
+        is31fl3745_select_page(addr, IS31FL3745_COMMAND_SCALING);
+
+        for (int i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
+            is31fl3745_write_register(addr, i + 1, g_scaling_registers[index][i]);
+        }
+        g_scaling_registers_update_required[index] = false;
+    }
+}
+
+void is31fl3745_flush(void) {
+    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3745_I2C_ADDRESS_2)
+    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3745_I2C_ADDRESS_3)
+    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3745_I2C_ADDRESS_4)
+    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
diff --git a/drivers/led/issi/is31fl3745-simple.h b/drivers/led/issi/is31fl3745-simple.h
new file mode 100644
index 0000000000..dbff193acd
--- /dev/null
+++ b/drivers/led/issi/is31fl3745-simple.h
@@ -0,0 +1,272 @@
+/* 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"
+#include "util.h"
+
+#define IS31FL3745_REG_ID 0xFC
+
+#define IS31FL3745_REG_COMMAND 0xFD
+
+#define IS31FL3745_COMMAND_PWM 0x00
+#define IS31FL3745_COMMAND_SCALING 0x01
+#define IS31FL3745_COMMAND_FUNCTION 0x02
+
+#define IS31FL3745_FUNCTION_REG_CONFIGURATION 0x00
+#define IS31FL3745_FUNCTION_REG_GLOBAL_CURRENT 0x01
+#define IS31FL3745_FUNCTION_REG_PULLDOWNUP 0x02
+#define IS31FL3745_FUNCTION_REG_TEMPERATURE 0x24
+#define IS31FL3745_FUNCTION_REG_SPREAD_SPECTRUM 0x25
+#define IS31FL3745_FUNCTION_REG_RESET 0x2F
+
+#define IS31FL3745_REG_COMMAND_WRITE_LOCK 0xFE
+#define IS31FL3745_COMMAND_WRITE_LOCK_MAGIC 0xC5
+
+#define IS31FL3745_I2C_ADDRESS_GND_GND 0x20
+#define IS31FL3745_I2C_ADDRESS_GND_SCL 0x21
+#define IS31FL3745_I2C_ADDRESS_GND_SDA 0x22
+#define IS31FL3745_I2C_ADDRESS_GND_VCC 0x23
+#define IS31FL3745_I2C_ADDRESS_SCL_GND 0x24
+#define IS31FL3745_I2C_ADDRESS_SCL_SCL 0x25
+#define IS31FL3745_I2C_ADDRESS_SCL_SDA 0x26
+#define IS31FL3745_I2C_ADDRESS_SCL_VCC 0x27
+#define IS31FL3745_I2C_ADDRESS_SDA_GND 0x28
+#define IS31FL3745_I2C_ADDRESS_SDA_SCL 0x29
+#define IS31FL3745_I2C_ADDRESS_SDA_SDA 0x2A
+#define IS31FL3745_I2C_ADDRESS_SDA_VCC 0x2B
+#define IS31FL3745_I2C_ADDRESS_VCC_GND 0x2C
+#define IS31FL3745_I2C_ADDRESS_VCC_SCL 0x2D
+#define IS31FL3745_I2C_ADDRESS_VCC_SDA 0x2E
+#define IS31FL3745_I2C_ADDRESS_VCC_VCC 0x2F
+
+#if defined(LED_MATRIX_IS31FL3745)
+#    define IS31FL3745_LED_COUNT LED_MATRIX_LED_COUNT
+#endif
+
+#if defined(IS31FL3745_I2C_ADDRESS_4)
+#    define IS31FL3745_DRIVER_COUNT 4
+#elif defined(IS31FL3745_I2C_ADDRESS_3)
+#    define IS31FL3745_DRIVER_COUNT 3
+#elif defined(IS31FL3745_I2C_ADDRESS_2)
+#    define IS31FL3745_DRIVER_COUNT 2
+#elif defined(IS31FL3745_I2C_ADDRESS_1)
+#    define IS31FL3745_DRIVER_COUNT 1
+#endif
+
+typedef struct is31fl3745_led_t {
+    uint8_t driver : 2;
+    uint8_t v;
+} PACKED is31fl3745_led_t;
+
+extern const is31fl3745_led_t PROGMEM g_is31fl3745_leds[IS31FL3745_LED_COUNT];
+
+void is31fl3745_init_drivers(void);
+void is31fl3745_init(uint8_t addr, uint8_t sync);
+void is31fl3745_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void is31fl3745_select_page(uint8_t addr, uint8_t page);
+void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void is31fl3745_set_value(int index, uint8_t value);
+void is31fl3745_set_value_all(uint8_t value);
+
+void is31fl3745_set_scaling_register(uint8_t index, uint8_t value);
+
+void is31fl3745_update_pwm_buffers(uint8_t addr, uint8_t index);
+void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index);
+
+void is31fl3745_flush(void);
+
+#define IS31FL3745_PDR_0_OHM 0b000          // No pull-down resistor
+#define IS31FL3745_PDR_0K5_OHM_SW_OFF 0b001 // 0.5 kOhm resistor in SWx off time
+#define IS31FL3745_PDR_1K_OHM_SW_OFF 0b010  // 1 kOhm resistor in SWx off time
+#define IS31FL3745_PDR_2K_OHM_SW_OFF 0b011  // 2 kOhm resistor in SWx off time
+#define IS31FL3745_PDR_1K_OHM 0b100         // 1 kOhm resistor
+#define IS31FL3745_PDR_2K_OHM 0b101         // 2 kOhm resistor
+#define IS31FL3745_PDR_4K_OHM 0b110         // 4 kOhm resistor
+#define IS31FL3745_PDR_8K_OHM 0b111         // 8 kOhm resistor
+
+#define IS31FL3745_PUR_0_OHM 0b000          // No pull-up resistor
+#define IS31FL3745_PUR_0K5_OHM_CS_OFF 0b001 // 0.5 kOhm resistor in CSy off time
+#define IS31FL3745_PUR_1K_OHM_CS_OFF 0b010  // 1 kOhm resistor in CSy off time
+#define IS31FL3745_PUR_2K_OHM_CS_OFF 0b011  // 2 kOhm resistor in CSy off time
+#define IS31FL3745_PUR_1K_OHM 0b100         // 1 kOhm resistor
+#define IS31FL3745_PUR_2K_OHM 0b101         // 2 kOhm resistor
+#define IS31FL3745_PUR_4K_OHM 0b110         // 4 kOhm resistor
+#define IS31FL3745_PUR_8K_OHM 0b111         // 8 kOhm resistor
+
+#define IS31FL3745_SYNC_NONE 0b00
+#define IS31FL3745_SYNC_SLAVE 0b10
+#define IS31FL3745_SYNC_MASTER 0b11
+
+#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/is31fl3745.c b/drivers/led/issi/is31fl3745.c
new file mode 100644
index 0000000000..563fe3c115
--- /dev/null
+++ b/drivers/led/issi/is31fl3745.c
@@ -0,0 +1,220 @@
+#include "is31fl3745.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3745_PWM_REGISTER_COUNT 144
+#define IS31FL3745_SCALING_REGISTER_COUNT 144
+
+#ifndef IS31FL3745_I2C_TIMEOUT
+#    define IS31FL3745_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3745_I2C_PERSISTENCE
+#    define IS31FL3745_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3745_CONFIGURATION
+#    define IS31FL3745_CONFIGURATION 0x31
+#endif
+
+#ifndef IS31FL3745_SW_PULLDOWN
+#    define IS31FL3745_SW_PULLDOWN IS31FL3745_PDR_2K_OHM_SW_OFF
+#endif
+
+#ifndef IS31FL3745_CS_PULLUP
+#    define IS31FL3745_CS_PULLUP IS31FL3745_PUR_2K_OHM_CS_OFF
+#endif
+
+#ifndef IS31FL3745_GLOBAL_CURRENT
+#    define IS31FL3745_GLOBAL_CURRENT 0xFF
+#endif
+
+#ifndef IS31FL3745_SYNC_1
+#    define IS31FL3745_SYNC_1 IS31FL3745_SYNC_NONE
+#endif
+#ifndef IS31FL3745_SYNC_2
+#    define IS31FL3745_SYNC_2 IS31FL3745_SYNC_NONE
+#endif
+#ifndef IS31FL3745_SYNC_3
+#    define IS31FL3745_SYNC_3 IS31FL3745_SYNC_NONE
+#endif
+#ifndef IS31FL3745_SYNC_4
+#    define IS31FL3745_SYNC_4 IS31FL3745_SYNC_NONE
+#endif
+
+uint8_t i2c_transfer_buffer[20] = {0xFF};
+
+uint8_t g_pwm_buffer[IS31FL3745_DRIVER_COUNT][IS31FL3745_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[IS31FL3745_DRIVER_COUNT]        = {false};
+bool    g_scaling_registers_update_required[IS31FL3745_DRIVER_COUNT] = {false};
+
+uint8_t g_scaling_registers[IS31FL3745_DRIVER_COUNT][IS31FL3745_SCALING_REGISTER_COUNT];
+
+void is31fl3745_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if IS31FL3745_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3745_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3745_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3745_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3745_select_page(uint8_t addr, uint8_t page) {
+    is31fl3745_write_register(addr, IS31FL3745_REG_COMMAND_WRITE_LOCK, IS31FL3745_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3745_write_register(addr, IS31FL3745_REG_COMMAND, page);
+}
+
+void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // Assumes page 0 is already selected.
+    // If any of the transactions fails function returns false.
+    // Transmit PWM registers in 12 transfers of 16 bytes.
+    // i2c_transfer_buffer[] is 20 bytes
+
+    // Iterate over the pwm_buffer contents at 16 byte intervals.
+    for (int i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i += 16) {
+        i2c_transfer_buffer[0] = i + 1;
+        // 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(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
+
+#if IS31FL3745_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3745_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3745_I2C_TIMEOUT) != 0) break;
+        }
+#else
+        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3745_I2C_TIMEOUT);
+#endif
+    }
+}
+
+void is31fl3745_init_drivers(void) {
+    i2c_init();
+
+    is31fl3745_init(IS31FL3745_I2C_ADDRESS_1, IS31FL3745_SYNC_1);
+#if defined(IS31FL3745_I2C_ADDRESS_2)
+    is31fl3745_init(IS31FL3745_I2C_ADDRESS_2, IS31FL3745_SYNC_2);
+#    if defined(IS31FL3745_I2C_ADDRESS_3)
+    is31fl3745_init(IS31FL3745_I2C_ADDRESS_3, IS31FL3745_SYNC_3);
+#        if defined(IS31FL3745_I2C_ADDRESS_4)
+    is31fl3745_init(IS31FL3745_I2C_ADDRESS_4, IS31FL3745_SYNC_4);
+#        endif
+#    endif
+#endif
+
+    for (int i = 0; i < IS31FL3745_LED_COUNT; i++) {
+        is31fl3745_set_scaling_register(i, 0xFF, 0xFF, 0xFF);
+    }
+
+    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3745_I2C_ADDRESS_2)
+    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3745_I2C_ADDRESS_3)
+    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3745_I2C_ADDRESS_4)
+    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
+
+void is31fl3745_init(uint8_t addr, uint8_t sync) {
+    // 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.
+
+    is31fl3745_select_page(addr, IS31FL3745_COMMAND_SCALING);
+
+    // Turn off all LEDs.
+    for (int i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
+        is31fl3745_write_register(addr, i + 1, 0x00);
+    }
+
+    is31fl3745_select_page(addr, IS31FL3745_COMMAND_PWM);
+
+    for (int i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i++) {
+        is31fl3745_write_register(addr, i + 1, 0x00);
+    }
+
+    is31fl3745_select_page(addr, IS31FL3745_COMMAND_FUNCTION);
+
+    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_PULLDOWNUP, (IS31FL3745_SW_PULLDOWN << 4) | IS31FL3745_CS_PULLUP);
+    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3745_GLOBAL_CURRENT);
+    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
+    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_CONFIGURATION, IS31FL3745_CONFIGURATION);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3745_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
+    is31fl3745_led_t led;
+    if (index >= 0 && index < IS31FL3745_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3745_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
+            return;
+        }
+        g_pwm_buffer_update_required[led.driver] = true;
+        g_pwm_buffer[led.driver][led.r]          = red;
+        g_pwm_buffer[led.driver][led.g]          = green;
+        g_pwm_buffer[led.driver][led.b]          = blue;
+    }
+}
+
+void is31fl3745_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
+    for (int i = 0; i < IS31FL3745_LED_COUNT; i++) {
+        is31fl3745_set_color(i, red, green, blue);
+    }
+}
+
+void is31fl3745_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, uint8_t blue) {
+    is31fl3745_led_t led;
+    memcpy_P(&led, (&g_is31fl3745_leds[index]), sizeof(led));
+
+    g_scaling_registers[led.driver][led.r] = red;
+    g_scaling_registers[led.driver][led.g] = green;
+    g_scaling_registers[led.driver][led.b] = blue;
+
+    g_scaling_registers_update_required[led.driver] = true;
+}
+
+void is31fl3745_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        is31fl3745_select_page(addr, IS31FL3745_COMMAND_PWM);
+
+        is31fl3745_write_pwm_buffer(addr, g_pwm_buffer[index]);
+    }
+
+    g_pwm_buffer_update_required[index] = false;
+}
+
+void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index) {
+    if (g_scaling_registers_update_required[index]) {
+        is31fl3745_select_page(addr, IS31FL3745_COMMAND_SCALING);
+
+        for (int i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
+            is31fl3745_write_register(addr, i + 1, g_scaling_registers[index][i]);
+        }
+        g_scaling_registers_update_required[index] = false;
+    }
+}
+
+void is31fl3745_flush(void) {
+    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3745_I2C_ADDRESS_2)
+    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3745_I2C_ADDRESS_3)
+    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3745_I2C_ADDRESS_4)
+    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
diff --git a/drivers/led/issi/is31fl3745.h b/drivers/led/issi/is31fl3745.h
index 1e88aab4a8..f0bffb6c53 100644
--- a/drivers/led/issi/is31fl3745.h
+++ b/drivers/led/issi/is31fl3745.h
@@ -20,103 +20,107 @@
 
 #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
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
 
-// Set defaults for Spread Spectrum Register
-#ifndef ISSI_SSR_1
-#    ifndef DRIVER_ADDR_2
-#        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
+#define IS31FL3745_REG_ID 0xFC
 
-// Command Registers
-#define ISSI_COMMANDREGISTER_WRITELOCK 0xFE
-#define ISSI_COMMANDREGISTER 0xFD
-#define ISSI_IDREGISTER 0xFC
-#define ISSI_REGISTER_UNLOCK 0xC5
+#define IS31FL3745_REG_COMMAND 0xFD
 
-// Response Registers
-#define ISSI_PAGE_PWM 0x00
-#define ISSI_PAGE_SCALING 0x01
-#define ISSI_PAGE_FUNCTION 0x02
+#define IS31FL3745_COMMAND_PWM 0x00
+#define IS31FL3745_COMMAND_SCALING 0x01
+#define IS31FL3745_COMMAND_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
+#define IS31FL3745_FUNCTION_REG_CONFIGURATION 0x00
+#define IS31FL3745_FUNCTION_REG_GLOBAL_CURRENT 0x01
+#define IS31FL3745_FUNCTION_REG_PULLDOWNUP 0x02
+#define IS31FL3745_FUNCTION_REG_TEMPERATURE 0x24
+#define IS31FL3745_FUNCTION_REG_SPREAD_SPECTRUM 0x25
+#define IS31FL3745_FUNCTION_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
+#define IS31FL3745_REG_COMMAND_WRITE_LOCK 0xFE
+#define IS31FL3745_COMMAND_WRITE_LOCK_MAGIC 0xC5
 
-// 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
+#define IS31FL3745_I2C_ADDRESS_GND_GND 0x20
+#define IS31FL3745_I2C_ADDRESS_GND_SCL 0x21
+#define IS31FL3745_I2C_ADDRESS_GND_SDA 0x22
+#define IS31FL3745_I2C_ADDRESS_GND_VCC 0x23
+#define IS31FL3745_I2C_ADDRESS_SCL_GND 0x24
+#define IS31FL3745_I2C_ADDRESS_SCL_SCL 0x25
+#define IS31FL3745_I2C_ADDRESS_SCL_SDA 0x26
+#define IS31FL3745_I2C_ADDRESS_SCL_VCC 0x27
+#define IS31FL3745_I2C_ADDRESS_SDA_GND 0x28
+#define IS31FL3745_I2C_ADDRESS_SDA_SCL 0x29
+#define IS31FL3745_I2C_ADDRESS_SDA_SDA 0x2A
+#define IS31FL3745_I2C_ADDRESS_SDA_VCC 0x2B
+#define IS31FL3745_I2C_ADDRESS_VCC_GND 0x2C
+#define IS31FL3745_I2C_ADDRESS_VCC_SCL 0x2D
+#define IS31FL3745_I2C_ADDRESS_VCC_SDA 0x2E
+#define IS31FL3745_I2C_ADDRESS_VCC_VCC 0x2F
+
+#if defined(RGB_MATRIX_IS31FL3745)
+#    define IS31FL3745_LED_COUNT RGB_MATRIX_LED_COUNT
 #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
+#if defined(IS31FL3745_I2C_ADDRESS_4)
+#    define IS31FL3745_DRIVER_COUNT 4
+#elif defined(IS31FL3745_I2C_ADDRESS_3)
+#    define IS31FL3745_DRIVER_COUNT 3
+#elif defined(IS31FL3745_I2C_ADDRESS_2)
+#    define IS31FL3745_DRIVER_COUNT 2
+#elif defined(IS31FL3745_I2C_ADDRESS_1)
+#    define IS31FL3745_DRIVER_COUNT 1
 #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
+typedef struct is31fl3745_led_t {
+    uint8_t driver : 2;
+    uint8_t r;
+    uint8_t g;
+    uint8_t b;
+} PACKED is31fl3745_led_t;
+
+extern const is31fl3745_led_t PROGMEM g_is31fl3745_leds[IS31FL3745_LED_COUNT];
+
+void is31fl3745_init_drivers(void);
+void is31fl3745_init(uint8_t addr, uint8_t sync);
+void is31fl3745_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void is31fl3745_select_page(uint8_t addr, uint8_t page);
+void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void is31fl3745_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
+void is31fl3745_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
+
+void is31fl3745_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, uint8_t blue);
+
+void is31fl3745_update_pwm_buffers(uint8_t addr, uint8_t index);
+void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index);
+
+void is31fl3745_flush(void);
+
+#define IS31FL3745_PDR_0_OHM 0b000          // No pull-down resistor
+#define IS31FL3745_PDR_0K5_OHM_SW_OFF 0b001 // 0.5 kOhm resistor in SWx off time
+#define IS31FL3745_PDR_1K_OHM_SW_OFF 0b010  // 1 kOhm resistor in SWx off time
+#define IS31FL3745_PDR_2K_OHM_SW_OFF 0b011  // 2 kOhm resistor in SWx off time
+#define IS31FL3745_PDR_1K_OHM 0b100         // 1 kOhm resistor
+#define IS31FL3745_PDR_2K_OHM 0b101         // 2 kOhm resistor
+#define IS31FL3745_PDR_4K_OHM 0b110         // 4 kOhm resistor
+#define IS31FL3745_PDR_8K_OHM 0b111         // 8 kOhm resistor
+
+#define IS31FL3745_PUR_0_OHM 0b000          // No pull-up resistor
+#define IS31FL3745_PUR_0K5_OHM_CS_OFF 0b001 // 0.5 kOhm resistor in CSy off time
+#define IS31FL3745_PUR_1K_OHM_CS_OFF 0b010  // 1 kOhm resistor in CSy off time
+#define IS31FL3745_PUR_2K_OHM_CS_OFF 0b011  // 2 kOhm resistor in CSy off time
+#define IS31FL3745_PUR_1K_OHM 0b100         // 1 kOhm resistor
+#define IS31FL3745_PUR_2K_OHM 0b101         // 2 kOhm resistor
+#define IS31FL3745_PUR_4K_OHM 0b110         // 4 kOhm resistor
+#define IS31FL3745_PUR_8K_OHM 0b111         // 8 kOhm resistor
 
-// Location of 1st bit for PWM and Scaling registers
-#define ISSI_PWM_REG_1ST 0x01
-#define ISSI_SCL_REG_1ST 0x01
+#define IS31FL3745_SYNC_NONE 0b00
+#define IS31FL3745_SYNC_SLAVE 0b10
+#define IS31FL3745_SYNC_MASTER 0b11
 
-// 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
diff --git a/drivers/led/issi/is31flcommon.h b/drivers/led/issi/is31flcommon.h
index e4ee372921..e5c4c52125 100644
--- a/drivers/led/issi/is31flcommon.h
+++ b/drivers/led/issi/is31flcommon.h
@@ -26,9 +26,7 @@
 #include "util.h"
 
 // Which variant header file to use
-#if defined(LED_MATRIX_IS31FL3745) || defined(RGB_MATRIX_IS31FL3745)
-#    include "is31fl3745.h"
-#elif defined(LED_MATRIX_IS31FL3746A) || defined(RGB_MATRIX_IS31FL3746A)
+#if defined(LED_MATRIX_IS31FL3746A) || defined(RGB_MATRIX_IS31FL3746A)
 #    include "is31fl3746.h"
 #endif