Update is31fl3731-simple (qmk#7610)

* update simple

* Update is31fl3731-simple.c

drivers/issi/is31fl3731-simple.c

@@ -63,7 +63,7 @@ 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[LED_DRIVER_COUNT][144];
-bool    g_pwm_buffer_update_required = false;
+bool    g_pwm_buffer_update_required[LED_DRIVER_COUNT] = {false};
 
 /* There's probably a better way to init this... */
 #if LED_DRIVER_COUNT == 1
@@ -75,7 +75,7 @@ uint8_t g_led_control_registers[LED_DRIVER_COUNT][18] = {{0}, {0}, {0}};
 #elif LED_DRIVER_COUNT == 4
 uint8_t g_led_control_registers[LED_DRIVER_COUNT][18] = {{0}, {0}, {0}, {0}};
 #endif
-bool g_led_control_registers_update_required = false;
+bool    g_led_control_registers_update_required[LED_DRIVER_COUNT] = {false};
 
 // This is the bit pattern in the LED control registers
 // (for matrix A, add one to register for matrix B)
@@ -190,8 +190,8 @@ void IS31FL3731_set_value(int index, uint8_t value) {
         is31_led led = g_is31_leds[index];
 
         // Subtract 0x24 to get the second index of g_pwm_buffer
-        g_pwm_buffer[led.driver][led.v - 0x24] = value;
-        g_pwm_buffer_update_required           = true;
+        g_pwm_buffer[led.driver][led.v - 0x24]   = value;
+        g_pwm_buffer_update_required[led.driver] = true;
     }
 }
 
@@ -213,20 +213,21 @@ void IS31FL3731_set_led_control_register(uint8_t index, bool value) {
         g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
     }
 
-    g_led_control_registers_update_required = true;
+    g_led_control_registers_update_required[led.driver] = true;
 }
 
 void IS31FL3731_update_pwm_buffers(uint8_t addr, uint8_t index) {
-    if (g_pwm_buffer_update_required) {
+    if (g_pwm_buffer_update_required[index]) {
         IS31FL3731_write_pwm_buffer(addr, g_pwm_buffer[index]);
-        g_pwm_buffer_update_required = false;
+        g_pwm_buffer_update_required[index] = false;
     }
 }
 
 void IS31FL3731_update_led_control_registers(uint8_t addr, uint8_t index) {
-    if (g_led_control_registers_update_required) {
+    if (g_led_control_registers_update_required[index]) {
         for (int i = 0; i < 18; i++) {
             IS31FL3731_write_register(addr, i, g_led_control_registers[index][i]);
         }
+        g_led_control_registers_update_required[index] = false;
     }
 }