arm64: dts: rockchip: Add Pinephone Pro support for GPIO LEDs

The PinePhone Pro has a cluster of 3 single RGB GPIO LEDs.
Add the GPIO entries for the 3 red/green/blue LEDs and an
entry for the multi-color group to allow them to be used
as a combined RGB LED.
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Link: https://lore.kernel.org/r/20240623165326.1273944-1-pbrobinson@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts

@@ -12,6 +12,7 @@
 /dts-v1/;
 #include <dt-bindings/input/gpio-keys.h>
 #include <dt-bindings/input/linux-event-codes.h>
+#include <dt-bindings/leds/common.h>
 #include "rk3399.dtsi"
 #include "rk3399-opp.dtsi"
 
@@ -69,6 +70,34 @@ key-power {
 		};
 	};
 
+	leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&red_led_pin &green_led_pin &blue_led_pin>;
+
+		led_red: led-0 {
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&gpio4 RK_PD2 GPIO_ACTIVE_HIGH>;
+		};
+
+		led_green: led-1 {
+			color = <LED_COLOR_ID_GREEN>;
+			gpios = <&gpio4 RK_PD5 GPIO_ACTIVE_HIGH>;
+		};
+
+		led_blue: led-2 {
+			color = <LED_COLOR_ID_BLUE>;
+			gpios = <&gpio4 RK_PD6 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	multi-led {
+		compatible = "leds-group-multicolor";
+		color = <LED_COLOR_ID_RGB>;
+		function = LED_FUNCTION_INDICATOR;
+		leds = <&led_red>, <&led_green>, <&led_blue>;
+	};
+
 	vcc_sys: vcc-sys-regulator {
 		compatible = "regulator-fixed";
 		regulator-name = "vcc_sys";
@@ -481,6 +510,20 @@ pwrbtn_pin: pwrbtn-pin {
 		};
 	};
 
+	leds {
+		red_led_pin: red-led-pin {
+			rockchip,pins = <4 RK_PD2 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		green_led_pin: green-led-pin {
+			rockchip,pins = <4 RK_PD5 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		blue_led_pin: blue-led-pin {
+			rockchip,pins = <4 RK_PD6 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	pmic {
 		pmic_int_l: pmic-int-l {
 			rockchip,pins = <1 RK_PC5 RK_FUNC_GPIO &pcfg_pull_up>;