boards: mimxrt1180_evk: Enable PWM for RT1180 EVK

Enables PWM for RT1180 EVK. Tested with sample led_pwm

Signed-off-by: Lucien Zhao <[email protected]>

Author: lucien-nxp

boards/nxp/mimxrt1180_evk/doc/index.rst

@@ -114,6 +114,8 @@ configuration supports the following hardware features:
 +-----------+------------+-------------------------------------+
 | FLEXSPI   | on-chip    | flash programming                   |
 +-----------+------------+-------------------------------------+
+| PWM       | on-chip    | pwm                                 |
++-----------+------------+-------------------------------------+
 
 The default configuration can be found in the defconfig file:
 :zephyr_file:`boards/nxp/mimxrt1180_evk/mimxrt1180_evk_mimxrt1189_cm33_defconfig`

boards/nxp/mimxrt1180_evk/mimxrt1180_evk-pinctrl.dtsi

@@ -129,4 +129,12 @@
 			input-enable;
 		};
 	};
+
+	pinmux_flexpwm2: pinmux_flexpwm2 {
+		group0 {
+			pinmux = <&iomuxc_gpio_ad_27_flexpwm2_pwm1_b>;
+			drive-strength = "high";
+			slew-rate = "fast";
+		};
+	};
 };

boards/nxp/mimxrt1180_evk/mimxrt1180_evk.dtsi

@@ -11,6 +11,7 @@
 	aliases {
 		led0 = &green_led;
 		sw0 = &user_button;
+		pwm-led0 = &green_pwm_led;
 	};
 
 	leds {
@@ -29,6 +30,13 @@
 			zephyr,code = <INPUT_KEY_0>;
 		};
 	};
+
+	pwmleds {
+		compatible = "pwm-leds";
+		green_pwm_led: green_pwm_led {
+			pwms = <&flexpwm2_pwm1 1 PWM_MSEC(20) PWM_POLARITY_NORMAL>;
+		};
+	};
 };
 
 &lpuart1 {
@@ -125,3 +133,9 @@
 		max-bitrate = <5000000>;
 	};
 };
+
+&flexpwm2_pwm1 {
+	status = "okay";
+	pinctrl-0 = <&pinmux_flexpwm2>;
+	pinctrl-names = "default";
+};

boards/nxp/mimxrt1180_evk/mimxrt1180_evk_mimxrt1189_cm33.yaml

@@ -22,4 +22,5 @@ supported:
   - adc
   - netif:eth
   - can
+  - pwm
 vendor: nxp

boards/nxp/mimxrt1180_evk/mimxrt1180_evk_mimxrt1189_cm7.yaml

@@ -21,4 +21,5 @@ supported:
   - counter
   - adc
   - can
+  - pwm
 vendor: nxp