boards: microchip: sam: add PWM to sama7g54-ek dts and yaml files

Add PWM and pwmled nodes to sama7g54_ek.dts file.
Add pwm to sama7g54_ek.yaml support list.

Signed-off-by: Tony Han <tony.han@microchip.com>

boards/microchip/sam/sama7g54_ek/sama7g54_ek.dts

@@ -12,6 +12,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/gpio/microchip-sam-gpio.h>
 #include <dt-bindings/input/input-event-codes.h>
+#include <dt-bindings/pwm/pwm.h>
 #include <microchip/sam/sama7g5.dtsi>
 
 / {
@@ -20,6 +21,7 @@
 
 	aliases {
 		led0 = &led_green;
+		pwm-led0 = &pwm_led_green;
 		sw0 = &button_user;
 		sdhc0 = &sdmmc0;
 		sdhc1 = &sdmmc1;
@@ -76,6 +78,19 @@
 			zephyr,code = <INPUT_KEY_0>;
 		};
 	};
+
+	pwmleds: pwmleds {
+		compatible = "pwm-leds";
+		status = "disabled"; /* Conflict with leds. */
+
+		pwm_led_green: pwm_led_green {
+			pwms = <&pwm 2 PWM_MSEC(20) PWM_POLARITY_INVERTED>;
+		};
+
+		pwm_led_blue: pwm_led_blue {
+			pwms = <&pwm 3 PWM_MSEC(20) PWM_POLARITY_INVERTED>;
+		};
+	};
 };
 
 &flx3 {
@@ -138,6 +153,18 @@
 		};
 	};
 
+	pinctrl_mikrobus_pwm_default: pinctrl_mikrobus_pwm_default {
+		mikrobus1_pwm2 {
+			pinmux = <PIN_PA13__PWMH2>;
+			bias-disable;
+		};
+
+		mikrobus2_pwm3 {
+			pinmux = <PIN_PD20__PWMH3>;
+			bias-disable;
+		};
+	};
+
 	pinctrl_sdmmc0_default: sdmmc0_default {
 		cmd_data {
 			pinmux = <PIN_PA1__SDMMC0_CMD>,
@@ -185,6 +212,11 @@
 	clock-frequency = <DT_FREQ_M(10)>;
 };
 
+&pwm {
+	pinctrl-0 = <&pinctrl_mikrobus_pwm_default>;
+	pinctrl-names = "default";
+};
+
 &sdmmc0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_sdmmc0_default>;

boards/microchip/sam/sama7g54_ek/sama7g54_ek.yaml

@@ -9,6 +9,7 @@ toolchain:
   - zephyr
 ram: 128
 supported:
+  - pwm
   - sdhc
   - shell
   - uart