Trying to set up PWMs on a custom board

Question

Hi,

I am trying to set up PWMs on a custom board, but I am not able to observe the outputs using an oscilloscope (pins are constantly at 0V). The PWM channels should be set to P0.26 and P0.27.

Here is my device tree:

// Copyright (c) 2022 Nordic Semiconductor ASA
// SPDX-License-Identifier: Apache-2.0

/dts-v1/;
#include <nordic/nrf52840_qiaa.dtsi>

/ {
	model = "10_000010_00_Throttle_Splitter";
	compatible = "fifteen-motors,10-000010-00-throttle-splitter";

	chosen {
		zephyr,sram = &sram0;
		zephyr,flash = &flash0;
		zephyr,code-partition = &slot0_partition;
	};

	leds {
		compatible = "gpio-leds";
		ledbar0: led_0 {
			gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;
			label = "LED Bar 0";
		};
		ledbar1: led_1 {
			gpios = <&gpio0 15 GPIO_ACTIVE_HIGH>;
			label = "LED Bar 1";
		};
		ledbar2: led_2 {
			gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
			label = "LED Bar 2";
		};
		ledbar3: led_3 {
			gpios = <&gpio0 17 GPIO_ACTIVE_HIGH>;
			label = "LED Bar 3";
		};
		ledbuttonl: led_l {
			gpios = <&gpio0 24 GPIO_ACTIVE_HIGH>;
			label = "LED Button Left";
		};
		ledbuttonr: led_r {
			gpios = <&gpio0 25 GPIO_ACTIVE_HIGH>;
			label = "LED Button Right";
		};
	};

	pwmdevs {
		compatible = "pwm-leds";
		pwm_dev0: pwm_dev0 {
		 	pwms = <&pwm0 26  PWM_USEC(1000) PWM_POLARITY_NORMAL>;
		};
		pwm_dev1: pwm_dev1 {
			pwms = <&pwm1 27 PWM_USEC(1000) PWM_POLARITY_NORMAL>;
		};
	};
	
	
	buttons {
		compatible = "gpio-keys";
		buttonl: button_l {
			gpios = <&gpio0 11 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
			label = "Push button switch left";
		};
		buttonr: button_r {
			gpios = <&gpio0 12 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
			label = "Push button switch right";
		};
	};

	/* These aliases are provided for compatibility with samples */
	aliases {
		buttonl = &buttonl;
		buttonr = &buttonr;
		ledbar0 = &ledbar0;
		ledbar1 = &ledbar1;
		ledbar2 = &ledbar2;
		ledbar3 = &ledbar3;
		ledbuttonl = &ledbuttonl;
		ledbuttonr  = &ledbuttonr;
		mcfront = &pwm_dev0;
		mcrear = &pwm_dev1;
	};

};

&gpiote {
	status = "okay";
};

&gpio0 {
	status = "okay";
};

&gpio1 {
	status = "okay";
};

&pwm0 {
	status = "okay";
	ch0-pin = <26>;
	// ch0-inverted;
};

&pwm1 {
	status = "okay";
	ch0-pin = <27>;
	// ch0-inverted;
};


&flash0 {
	partitions {
		compatible = "fixed-partitions";
		#address-cells = <1>;
		#size-cells = <1>;

		boot_partition: partition@0 {
			label = "mcuboot";
			reg = <0x0 0xc000>;
		};
		slot0_partition: partition@c000 {
			label = "image-0";
			reg = <0xc000 0x72000>;
		};
		slot1_partition: partition@7e000 {
			label = "image-1";
			reg = <0x7e000 0x72000>;
		};
		scratch_partition: partition@f0000 {
			label = "image-scratch";
			reg = <0xf0000 0xa000>;
		};
		storage_partition: partition@fa000 {
			label = "storage";
			reg = <0xfa000 0x6000>;
		};
	};
};

In the main.c file, I am setting up the PWMs via the following:

// Parameters for PWM control
static const struct pwm_dt_spec pwm_front = PWM_DT_SPEC_GET(DT_ALIAS(mcfront));
static const struct pwm_dt_spec pwm_rear = PWM_DT_SPEC_GET(DT_ALIAS(mcrear));
#define PWM_PERIOD PWM_MSEC(1U)   // set PWMs to 10kHz

And have the following in my main loop:

// Set up PWMs
	if (!device_is_ready(pwm_front.dev) || !device_is_ready(pwm_rear.dev)) {
		return;
	}
	ret = pwm_set_dt(&pwm_front, PWM_PERIOD, PWM_PERIOD / 2U);
	ret = pwm_set_dt(&pwm_rear, PWM_PERIOD, PWM_PERIOD / 2U);

	// Initialize the LEDs and confirm they are ready to use
	if (!device_is_ready(led0.port)) {
		return;
	}

I have "supported:- pwm" in my YAML file, and "CONFIG_PWM=y" in my project config file.