118 files changed, 655 insertions, 606 deletions

diff --git a/drivers/issi/is31fl3731.c b/drivers/issi/is31fl3731.c
index c9155f5a37..30c7dd0530 100644
--- a/drivers/issi/is31fl3731.c
+++ b/drivers/issi/is31fl3731.c
@@ -71,10 +71,10 @@ uint8_t g_twi_transfer_buffer[20];
 // buffers and the transfers in IS31FL3731_write_pwm_buffer() but it's
 // probably not worth the extra complexity.
 uint8_t g_pwm_buffer[DRIVER_COUNT][144];
-bool g_pwm_buffer_update_required = false;
+bool g_pwm_buffer_update_required[DRIVER_COUNT] = { false };
 
 uint8_t g_led_control_registers[DRIVER_COUNT][18] = { { 0 }, { 0 } };
-bool g_led_control_registers_update_required = false;
+bool g_led_control_registers_update_required[DRIVER_COUNT] = { false };
 
 // This is the bit pattern in the LED control registers
 // (for matrix A, add one to register for matrix B)
@@ -204,7 +204,7 @@ void IS31FL3731_set_color( int index, uint8_t red, uint8_t green, uint8_t blue )
         g_pwm_buffer[led.driver][led.r - 0x24] = red;
         g_pwm_buffer[led.driver][led.g - 0x24] = green;
         g_pwm_buffer[led.driver][led.b - 0x24] = blue;
-        g_pwm_buffer_update_required = true;
+        g_pwm_buffer_update_required[led.driver] = true;
     }
 }
 
@@ -220,12 +220,12 @@ void IS31FL3731_set_led_control_register( uint8_t index, bool red, bool green, b
 {
     is31_led led = g_is31_leds[index];
 
-  uint8_t control_register_r = (led.r - 0x24) / 8;
-  uint8_t control_register_g = (led.g - 0x24) / 8;
-  uint8_t control_register_b = (led.b - 0x24) / 8;
-  uint8_t bit_r = (led.r - 0x24) % 8;
-  uint8_t bit_g = (led.g - 0x24) % 8;
-  uint8_t bit_b = (led.b - 0x24) % 8;