boards/arm/rpi_pico/rpi_pico.dts

/*
 * Copyright (c) 2021 Yonatan Schachter
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/dts-v1/;

#include <rpi_pico/rp2040.dtsi>
#include "rpi_pico-pinctrl.dtsi"
#include <zephyr/dt-bindings/pwm/pwm.h>

#include <zephyr/dt-bindings/i2c/i2c.h>

/ {
	chosen {
		zephyr,sram = &sram0;
		zephyr,flash = &flash0;
		zephyr,console = &uart0;
		zephyr,shell-uart = &uart0;
		zephyr,code-partition = &code_partition;
	};

	leds {
		compatible = "gpio-leds";
		led0: led_0 {
			gpios = <&gpio0 25 GPIO_ACTIVE_HIGH>;
			label = "LED";
		};
	};

	xtal_clk: xtal-clk {
		compatible = "fixed-clock";
		clock-frequency = <12000000>;
		#clock-cells = <0>;
	};

	pwm_leds {
		compatible = "pwm-leds";
		pwm_led0: pwm_led_0 {
			status = "disabled";
			pwms = <&pwm 9 PWM_MSEC(20) PWM_POLARITY_NORMAL>;
			label = "PWM_LED";
		};
	};

	aliases {
		led0 = &led0;
		watchdog0 = &wdt0;
		pwm-led0 = &pwm_led0;
	};
};

&flash0 {
	reg = <0x10000000 DT_SIZE_M(2)>;

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

		/* Reserved memory for the second stage bootloader */
		second_stage_bootloader: partition@0 {
			label = "second_stage_bootloader";
			reg = <0x00000000 0x100>;
			read-only;
		};

		/*
		 * Usable flash. Starts at 0x100, after the bootloader. The partition
		 * size is 2MB minus the 0x100 bytes taken by the bootloader.
		 */
		code_partition: partition@100 {
			label = "code-partition";
			reg = <0x100 (DT_SIZE_M(2) - 0x100)>;
			read-only;
		};
	};
};

&uart0 {
	current-speed = <115200>;
	status = "okay";
	pinctrl-0 = <&uart0_default>;
	pinctrl-names = "default";
};

&gpio0 {
	status = "okay";
};

&i2c0 {
	clock-frequency = <I2C_BITRATE_STANDARD>;
	status = "okay";
	pinctrl-0 = <&i2c0_default>;
	pinctrl-names = "default";
};

&i2c1 {
	clock-frequency = <I2C_BITRATE_STANDARD>;
	status = "okay";
	pinctrl-0 = <&i2c1_default>;
	pinctrl-names = "default";
};

&wdt0 {
	status = "okay";
};

zephyr_udc0: &usbd {
	status = "okay";
};

&pwm {
	pinctrl-0 = <&pwm_ch4b_default>;
	pinctrl-names = "default";
	divider-int-0 = <255>;
};