[nrf noup] boards: nordic: Add PWM support for LEDs on nRF54 DKs

Adds support for first possible LED to be connected with HW PWM.

Upstream PR: zephyrproject-rtos/zephyr#72010
Applied as noup, did not apply cleanly

Signed-off-by: Karol Lasończyk <[email protected]>
Signed-off-by: Robert Lubos <[email protected]>
(cherry picked from commit 58f7829)

Author: kl-cruz

boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20-pinctrl.dtsi

@@ -66,4 +66,17 @@
 				<NRF_PSEL(CAN_TX, 9, 5)>;
 		};
 	};
+
+	/omit-if-no-ref/ pwm130_default: pwm130_default {
+		group1 {
+			psels = <NRF_PSEL(PWM_OUT0, 9, 2)>;
+		};
+	};
+
+	/omit-if-no-ref/ pwm130_sleep: pwm130_sleep {
+		group1 {
+			psels = <NRF_PSEL(PWM_OUT0, 9, 2)>;
+			low-power-enable;
+		};
+	};
 };

boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp.dts

@@ -35,6 +35,7 @@
 		led1 = &led1;
 		led2 = &led2;
 		led3 = &led3;
+		pwm-led0 = &pwm_led0;
 		resetinfo = &cpuapp_resetinfo;
 		sw0 = &button0;
 		sw1 = &button1;
@@ -95,6 +96,13 @@
 			label = "Green LED 3";
 		};
 	};
+
+	pwmleds {
+		compatible = "pwm-leds";
+		pwm_led0: pwm_led_0 {
+			pwms = <&pwm130 0 PWM_MSEC(20) PWM_POLARITY_INVERTED>;
+		};
+	};
 };
 
 &cpuapp_ram0x_region {
@@ -253,3 +261,10 @@ zephyr_udc0: &usbhs {
 	pinctrl-0 = <&can120_default>;
 	pinctrl-names = "default";
 };
+
+&pwm130 {
+	status = "okay";
+	pinctrl-0 = <&pwm130_default>;
+	pinctrl-1 = <&pwm130_sleep>;
+	pinctrl-names = "default", "sleep";
+};

boards/nordic/nrf54l15pdk/nrf54l15pdk_nrf54l15-common.dtsi

@@ -27,6 +27,13 @@
 		};
 	};
 
+	pwmleds {
+		compatible = "pwm-leds";
+		pwm_led1: pwm_led_1 {
+			pwms = <&pwm20 0 PWM_MSEC(20) PWM_POLARITY_INVERTED>;
+		};
+	};
+
 	buttons {
 		compatible = "gpio-keys";
 		button0: button_0 {
@@ -56,6 +63,7 @@
 		led1 = &led1;
 		led2 = &led2;
 		led3 = &led3;
+		pwm-led0 = &pwm_led1;
 		sw0 = &button0;
 		sw1 = &button1;
 		sw2 = &button2;
@@ -77,3 +85,10 @@
 	pinctrl-1 = <&uart30_sleep>;
 	pinctrl-names = "default", "sleep";
 };
+
+&pwm20 {
+	status = "okay";
+	pinctrl-0 = <&pwm20_default>;
+	pinctrl-1 = <&pwm20_sleep>;
+	pinctrl-names = "default", "sleep";
+};

boards/nordic/nrf54l15pdk/nrf54l15pdk_nrf54l15-pinctrl.dtsi

@@ -64,4 +64,17 @@
 				low-power-enable;
 		};
 	};
+
+	/omit-if-no-ref/ pwm20_default: pwm20_default {
+		group1 {
+			psels = <NRF_PSEL(PWM_OUT0, 1, 8)>;
+		};
+	};
+
+	/omit-if-no-ref/ pwm20_sleep: pwm20_sleep {
+		group1 {
+			psels = <NRF_PSEL(PWM_OUT0, 1, 8)>;
+			low-power-enable;
+		};
+	};
 };

boards/nordic/nrf54l15pdk/nrf54l15pdk_nrf54l15_common_0_2_1.dtsi

@@ -35,3 +35,18 @@
 &button3 {
 	gpios = <&gpio2 10 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
 };
+
+&pinctrl {
+	/omit-if-no-ref/ pwm20_default: pwm20_default {
+		group1 {
+			psels = <NRF_PSEL(PWM_OUT0, 1, 10)>;
+		};
+	};
+
+	/omit-if-no-ref/ pwm20_sleep: pwm20_sleep {
+		group1 {
+			psels = <NRF_PSEL(PWM_OUT0, 1, 10)>;
+			low-power-enable;
+		};
+	};
+};