boards: Add DFRobot Beetle RP2040 board

# Copyright (c) 2025 Jonas Berg

# SPDX-License-Identifier: Apache-2.0

config BOARD_BEETLE_RP2040

	select RP2_FLASH_W25Q080

# Copyright (c) 2025 Jonas Berg

# SPDX-License-Identifier: Apache-2.0

config BOARD_BEETLE_RP2040

	select SOC_RP2040

# Copyright (c) 2022 Peter Johanson

# SPDX-License-Identifier: Apache-2.0

if BOARD_BEETLE_RP2040

if I2C_DW

config I2C_DW_CLOCK_SPEED

	default 125

endif # I2C_DW

config USB_SELF_POWERED

	default n

endif # BOARD_BEETLE_RP2040

/*

 * Copyright (c) 2025 Jonas Berg

 *

 * SPDX-License-Identifier: Apache-2.0

 */

#include <dt-bindings/pinctrl/rpi-pico-rp2040-pinctrl.h>

&pinctrl {

	uart1_default: uart1_default {

		group1 {

			pinmux = <UART1_TX_P4>;

		};

		group2 {

			pinmux = <UART1_RX_P5>;

			input-enable;

		};

	};

	adc_default: adc_default {

		group1 {

			pinmux = <ADC_CH2_P28>, <ADC_CH3_P29>;

			input-enable;

		};

	};

};

/*

 * Copyright (c) 2021 Yonatan Schachter

 * Copyright (c) 2022 Peter Johanson

 * Copyright (c) 2025 Jonas Berg

 *

 * SPDX-License-Identifier: Apache-2.0

 */

/dts-v1/;

#include <raspberrypi/rpi_pico/rp2040.dtsi>

#include <dt-bindings/pinctrl/rpi-pico-rp2040-pinctrl.h>

#include <zephyr/dt-bindings/input/input-event-codes.h>

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

#include "beetle_rp2040-pinctrl.dtsi"

/ {

	model = "DFRobot Beetle RP2040";

	compatible = "dfrobot,beetle_rp2040";

	chosen {

		zephyr,sram = &sram0;

		zephyr,flash = &flash0;

		zephyr,flash-controller = &ssi;

		zephyr,console = &uart1;

		zephyr,shell-uart = &uart1;

		zephyr,code-partition = &code_partition;

	};

	aliases {

		watchdog0 = &wdt0;

		led0 = &green_led;

	};

	zephyr,user {

		io-channels = <&adc 2>, <&adc 3>;

	};

	leds: leds {

		compatible = "gpio-leds";

		green_led: green_led {

			gpios = <&gpio0 13 GPIO_ACTIVE_HIGH>;

			label = "Green LED";

		};

	};

};

&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 2 MB minus the 0x100 bytes taken by the bootloader.

		 */

		code_partition: partition@100 {

			label = "code-partition";

			reg = <0x100 (DT_SIZE_M(2) - 0x100)>;

			read-only;

		};

	};

};

&gpio0 {

	status = "okay";

};

&uart1 {

	current-speed = <115200>;

	status = "okay";

	pinctrl-0 = <&uart1_default>;

	pinctrl-names = "default";

};

&timer {

	status = "okay";

};

&wdt0 {

	status = "okay";

};

&adc {

	status = "okay";

	pinctrl-0 = <&adc_default>;

	pinctrl-names = "default";

	#address-cells = <1>;

	#size-cells = <0>;

	channel@2 {

		reg = <2>;

		zephyr,gain = "ADC_GAIN_1";

		zephyr,reference = "ADC_REF_INTERNAL";

		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;

		zephyr,resolution = <12>;

	};

	channel@3 {

		reg = <3>;

		zephyr,gain = "ADC_GAIN_1";

		zephyr,reference = "ADC_REF_INTERNAL";

		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;

		zephyr,resolution = <12>;

	};

};

zephyr_udc0: &usbd {

	status = "okay";

};

&die_temp {

	status = "okay";

};

&vreg {

	regulator-always-on;

	regulator-allowed-modes = <REGULATOR_RPI_PICO_MODE_NORMAL>;

};

&xosc {

	startup-delay-multiplier = <64>;

};