boards: stm32wb5mmg_dk: add RGB LED support

This patch add RGB LED support for the TI
TLC59731 RGB controller.

Signed-off-by: Javad Rahimipetroudi <[email protected]>

Author: Javad Rahimipetroudi

boards/st/stm32wb5mm_dk/doc/stm32wb5mm_dk.rst

@@ -170,6 +170,14 @@ Serial Port
 STM32WB5MM-DK board has 2 (LP)U(S)ARTs. The Zephyr console output is assigned to USART1.
 Default settings are ``115200 8N1``.
 
+LEDs
+----
+STM32WB5MM-DK has two types of LEDs, The resources coming from STM32WB5MMG are
+shared between the RGB and IR LEDs. It is not possible to use them
+simultaneously. The selection is done by JP4 and JP5 jumpers.
+To use the RGB LED, JP5 must be ON and JP4 OFF. In this configuration,
+GPIO_SELECT2 (PH1) is the chip select for this RGB device on SPI1.
+
 
 Programming and Debugging
 *************************

boards/st/stm32wb5mm_dk/stm32wb5mm_dk.dts

@@ -8,6 +8,7 @@
 #include <st/wb/stm32wb55Xg.dtsi>
 #include <st/wb/stm32wb55vgyx-pinctrl.dtsi>
 #include <zephyr/dt-bindings/input/input-event-codes.h>
+#include <zephyr/dt-bindings/led/led.h>
 
 / {
 	model = "STMicroelectronics STM32WB5MM Discovery Development Kit";
@@ -22,11 +23,23 @@
 		zephyr,flash = &flash0;
 		zephyr,code-partition = &slot0_partition;
 	};
+
+	rgb_led_strip: rgb_strip {
+		compatible = "ti,tlc59731";
+		gpios = <&gpioa 7 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>;
+		chain-length = <1>;
+		color-mapping = <LED_COLOR_ID_BLUE
+				LED_COLOR_ID_GREEN
+				LED_COLOR_ID_RED>;
+		status = "disabled";
+	};
+
 	aliases {
 		watchdog0 = &iwdg;
 		die-temp0 = &die_temp;
 		volt-sensor0 = &vref;
 		volt-sensor1 = &vbat;
+		led-strip = &rgb_led_strip;
 	};
 };
 
@@ -136,6 +149,15 @@ zephyr_udc0: &usb {
 	};
 };
 
+&gpioh {
+	rgb_cs: rgb_cs {
+		gpios = <1 GPIO_ACTIVE_HIGH>;
+		gpio-hog;
+		output-high;
+		status = "disabled";
+	};
+};
+
 &vref {
 	status = "okay";
 };