boards: frdm_mcxc444: Add pwm support

Support pwm for NXP frdm_mcxc444 board.
Test it using samples/basic/blinky_pwm.

Signed-off-by: Neil Chen <[email protected]>

Author: NeilChen93

boards/nxp/frdm_mcxc444/doc/index.rst

@@ -61,6 +61,8 @@ The ``frdm_mcxc444`` board target supports the following hardware features:
 +-----------+------------+-------------------------------------+
 | PIT       | on-chip    | counter                             |
 +-----------+------------+-------------------------------------+
+| PWM       | on-chip    | pwm                                 |
++-----------+------------+-------------------------------------+
 | RTC       | on-chip    | counter                             |
 +-----------+------------+-------------------------------------+
 | USB       | on-chip    | USB device                          |

boards/nxp/frdm_mcxc444/frdm_mcxc444-pinctrl.dtsi

@@ -33,4 +33,13 @@
 			slew-rate = "slow";
 		};
 	};
+	pinmux_tpm0: pinmux_tpm0 {
+		group0 {
+			pinmux = <TPM0_CH2_PTE29>,
+				<TPM0_CH4_PTE31>,
+				<TPM0_CH5_PTD5>;
+			drive-strength = "low";
+			slew-rate = "slow";
+		};
+	};
 };

boards/nxp/frdm_mcxc444/frdm_mcxc444.dts

@@ -18,9 +18,16 @@
 		led0 = &red_led;
 		led1 = &green_led;
 		led2 = &blue_led;
+		pwm-led0 = &red_pwm_led;
+		pwm-led1 = &green_pwm_led;
+		pwm-led2 = &blue_pwm_led;
+		red-pwm-led = &red_pwm_led;
+		green-pwm-led = &green_pwm_led;
+		blue-pwm-led = &blue_pwm_led;
 		sw0 = &user_button_2;
 		sw1 = &user_button_3;
 		accel0 = &fxls8974;
+		pwm-0 = &tpm0;
 	};
 
 	chosen {
@@ -46,6 +53,23 @@
 		};
 	};
 
+	pwmleds {
+		compatible = "pwm-leds";
+		status = "disabled";
+		red_pwm_led: pwm_led_0 {
+			pwms = <&tpm0 4 PWM_MSEC(20) PWM_POLARITY_INVERTED>;
+			label = "PWM Red LED";
+		};
+		green_pwm_led: pwm_led_1 {
+			pwms = <&tpm0 5 PWM_MSEC(20) PWM_POLARITY_INVERTED>;
+			label = "PWM Green LED";
+		};
+		blue_pwm_led: pwm_led_2 {
+			pwms = <&tpm0 2 PWM_MSEC(20) PWM_POLARITY_INVERTED>;
+			label = "PWM Blue LED";
+		};
+	};
+
 	gpio_keys {
 		compatible = "gpio-keys";
 		user_button_2: button_2 {
@@ -142,6 +166,13 @@ i2c0: &i2c0 {
 	status = "okay";
 };
 
+&tpm0 {
+	status = "okay";
+	pinctrl-0 = <&pinmux_tpm0>;
+	pinctrl-names = "default";
+	clocks = <&sim KINETIS_SIM_OSCERCLK 0x103C 24>;
+};
+
 zephyr_udc0: &usb {
 	status = "okay";
 	num-bidir-endpoints = <8>;

boards/nxp/frdm_mcxc444/frdm_mcxc444.yaml

@@ -20,6 +20,7 @@ supported:
   - gpio
   - i2c
   - uart
+  - pwm
   - usb_device
   - usbd
 testing: