boards: frdm_mcxc242: Add pwm support

frdm_mcxc242 has tpm ip for pwm generation, but it is not enabled.
Configure and enable it. Add pwmleds definition and disable it,
as leds and pwmleds are mutually exclusive.
Update board documentation.

Signed-off-by: Michal Smola <michal.smola@nxp.com>

boards/nxp/frdm_mcxc242/doc/index.rst

@@ -66,6 +66,8 @@ The ``frdm_mcxc242`` board target supports the following hardware features:
 +-----------+------------+-------------------------------------+
 | I2C       | on-chip    | i2c                                 |
 +-----------+------------+-------------------------------------+
+| PWM       | on-chip    | pwm                                 |
++-----------+------------+-------------------------------------+
 
 
 Targets available

boards/nxp/frdm_mcxc242/frdm_mcxc242-pinctrl.dtsi

@@ -25,4 +25,20 @@
 			slew-rate = "fast";
 		};
 	};
+	pinmux_tpm1: pinmux_tpm1 {
+		group0 {
+			pinmux = <TPM1_CH0_PTA12>,
+				<TPM1_CH1_PTA13>;
+			drive-strength = "low";
+			slew-rate = "slow";
+		};
+	};
+	pinmux_tpm2: pinmux_tpm2 {
+		group0 {
+			pinmux = <TPM2_CH0_PTB18>,
+				<TPM2_CH1_PTB19>;
+			drive-strength = "low";
+			slew-rate = "slow";
+		};
+	};
 };

boards/nxp/frdm_mcxc242/frdm_mcxc242.dts

@@ -17,10 +17,17 @@
 	aliases {
 		led0 = &red_led;
 		led1 = &green_led;
-		led2 = &red_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 = &tpm1;
 	};
 
 	chosen {
@@ -46,6 +53,23 @@
 		};
 	};
 
+	pwmleds {
+		compatible = "pwm-leds";
+		status = "disabled";
+		red_pwm_led: pwm_led_0 {
+			pwms = <&tpm2 0 PWM_MSEC(20) PWM_POLARITY_INVERTED>;
+			label = "PWM Red LED";
+		};
+		green_pwm_led: pwm_led_1 {
+			pwms = <&tpm2 1 PWM_MSEC(20) PWM_POLARITY_INVERTED>;
+			label = "PWM Green LED";
+		};
+		blue_pwm_led: pwm_led_2 {
+			pwms = <&tpm1 1 PWM_MSEC(20) PWM_POLARITY_INVERTED>;
+			label = "PWM Blue LED";
+		};
+	};
+
 	gpio_keys {
 		compatible = "gpio-keys";
 		user_button_2: button_2 {
@@ -111,3 +135,15 @@ i2c1: &i2c1 {
 		int2-gpios = <&gpioc 3 GPIO_ACTIVE_LOW>;
 	};
 };
+
+&tpm1 {
+	status = "okay";
+	pinctrl-0 = <&pinmux_tpm1>;
+	pinctrl-names = "default";
+};
+
+&tpm2 {
+	status = "okay";
+	pinctrl-0 = <&pinmux_tpm2>;
+	pinctrl-names = "default";
+};

boards/nxp/frdm_mcxc242/frdm_mcxc242.yaml

@@ -17,6 +17,7 @@ toolchain:
 supported:
   - gpio
   - i2c
+  - pwm
 testing:
   ignore_tags:
     - net