Make SPI Mode configurable and change default mode to 3 (#17263)

docs/feature_rgb_matrix.md

@@ -409,6 +409,7 @@ You can use up to 2 AW20216 IC's. Do not specify `DRIVER_<N>_xxx` defines for IC
 | `DRIVER_LED_TOTAL` | (Required) How many RGB lights are present across all drivers | |
 | `AW_SCALING_MAX` | (Optional) LED current scaling value (0-255, higher values mean LED is brighter at full PWM) | 150 |
 | `AW_GLOBAL_CURRENT_MAX` | (Optional) Driver global current limit (0-255, higher values means the driver may consume more power) | 150 |
+| `AW_SPI_MODE` | (Optional) Mode for SPI communication (0-3, defines polarity and phase of the clock) | 3 |
 | `AW_SPI_DIVISOR` | (Optional) Clock divisor for SPI communication (powers of 2, smaller numbers means faster communication, should not be less than 4) | 4 |
 
 Here is an example using 2 drivers.

drivers/led/aw20216.c

@@ -53,6 +53,10 @@
 #    define AW_GLOBAL_CURRENT_MAX 150
 #endif
 
+#ifndef AW_SPI_MODE
+#    define AW_SPI_MODE 3
+#endif
+
 #ifndef AW_SPI_DIVISOR
 #    define AW_SPI_DIVISOR 4
 #endif
@@ -63,7 +67,7 @@ bool    g_pwm_buffer_update_required[DRIVER_COUNT] = {false};
 bool AW20216_write(pin_t cs_pin, uint8_t page, uint8_t reg, uint8_t* data, uint8_t len) {
     static uint8_t s_spi_transfer_buffer[2] = {0};
 
-    if (!spi_start(cs_pin, false, 3, AW_SPI_DIVISOR)) {
+    if (!spi_start(cs_pin, false, AW_SPI_MODE, AW_SPI_DIVISOR)) {
         spi_stop();
         return false;
     }