boards: Add Adafruit Feather Canbus board

Add support for the Adafruit Feather Canbus board.
The image is from https://learn.adafruit.com/assets/120914, with
the license CC BY-SA 3.0.

Signed-off-by: Jonas Berg <[email protected]>

Author: pyhys

boards/adafruit/feather_canbus_rp2040/Kconfig

@@ -0,0 +1,5 @@
+# Copyright (c) 2025 Jonas Berg
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_ADAFRUIT_FEATHER_CANBUS_RP2040
+	select RP2_FLASH_W25Q080

boards/adafruit/feather_canbus_rp2040/Kconfig.adafruit_feather_canbus_rp2040

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+# Copyright (c) 2025 Jonas Berg
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_ADAFRUIT_FEATHER_CANBUS_RP2040
+	select SOC_RP2040

boards/adafruit/feather_canbus_rp2040/Kconfig.defconfig

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+# Copyright (c) 2022 Peter Johanson
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_ADAFRUIT_FEATHER_CANBUS_RP2040
+
+if I2C_DW
+
+config I2C_DW_CLOCK_SPEED
+	default 125
+
+endif # I2C_DW
+
+config USB_SELF_POWERED
+	default n
+
+endif # BOARD_ADAFRUIT_FEATHER_CANBUS_RP2040

boards/adafruit/feather_canbus_rp2040/adafruit_feather_canbus_rp2040-pinctrl.dtsi

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+/*
+ * Copyright (c) 2025 Jonas Berg
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <dt-bindings/pinctrl/rpi-pico-rp2040-pinctrl.h>
+
+&pinctrl {
+	uart0_default: uart0_default {
+		group1 {
+			pinmux = <UART0_TX_P0>;
+		};
+
+		group2 {
+			pinmux = <UART0_RX_P1>;
+			input-enable;
+		};
+	};
+
+	i2c1_default: i2c1_default {
+		group1 {
+			pinmux = <I2C1_SDA_P2>;
+			input-enable;
+		};
+
+		group2 {
+			pinmux = <I2C1_SCL_P3>;
+			input-enable;
+		};
+	};
+
+	spi1_default: spi1_default {
+		group1 {
+			pinmux = <SPI1_TX_P15>;
+		};
+
+		group2 {
+			pinmux = <SPI1_RX_P8>;
+			input-enable;
+		};
+
+		group3 {
+			pinmux = <SPI1_SCK_P14>;
+		};
+	};
+
+	adc_default: adc_default {
+		group1 {
+			pinmux = <ADC_CH0_P26>, <ADC_CH1_P27>, <ADC_CH2_P28>, <ADC_CH3_P29>;
+			input-enable;
+		};
+	};
+
+	ws2812_pio0_default: ws2812_pio0_default {
+		group1 {
+			pinmux = <PIO0_P21>;
+		};
+	};
+};

boards/adafruit/feather_canbus_rp2040/adafruit_feather_canbus_rp2040.dts

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+/*
+ * 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 "adafruit_feather_canbus_rp2040-pinctrl.dtsi"
+#include "feather_connector.dtsi"
+
+/ {
+	model = "Adafruit Feather RP2040 Canbus";
+	compatible = "adafruit,feather_canbus_rp2040";
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,flash-controller = &ssi;
+		zephyr,console = &uart0;
+		zephyr,shell-uart = &uart0;
+		zephyr,code-partition = &code_partition;
+		zephyr,canbus = &mcp2515;
+	};
+
+	aliases {
+		watchdog0 = &wdt0;
+		led-strip = &ws2812;
+		led0 = &red_led;
+		sw0 = &user_button;
+	};
+
+	zephyr,user {
+		io-channels = <&adc 0>, <&adc 1>, <&adc 2>, <&adc 3>;
+	};
+
+	leds: leds {
+		compatible = "gpio-leds";
+
+		red_led: red_led {
+			gpios = <&gpio0 13 GPIO_ACTIVE_HIGH>;
+			label = "Red LED";
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+
+		user_button: button {
+			label = "User";
+			gpios = <&gpio0 7 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			zephyr,code = <INPUT_KEY_0>;
+		};
+	};
+
+	stemma_connector: stemma_connector {
+		compatible = "stemma-qt-connector";
+		#gpio-cells = <2>;
+		gpio-map-mask = <0xffffffff 0xffffffc0>;
+		gpio-map-pass-thru = <0 0x3f>;
+		gpio-map = <0 0 &gpio0 3 0>, /* SCL */
+		<1 0 &gpio0 2 0>; /* SDA */
+	};
+};
+
+&flash0 {
+	reg = <0x10000000 DT_SIZE_M(8)>;
+
+	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 8 MB minus the 0x100 bytes taken by the bootloader.
+		 */
+		code_partition: partition@100 {
+			label = "code-partition";
+			reg = <0x100 (DT_SIZE_M(8) - 0x100)>;
+			read-only;
+		};
+	};
+};
+
+&gpio0 {
+	status = "okay";
+
+	/* Power to Neopixel */
+	neopixel-power-enable {
+		gpio-hog;
+		gpios = <20 GPIO_ACTIVE_HIGH>;
+		output-high;
+	};
+};
+
+&uart0 {
+	current-speed = <115200>;
+	status = "okay";
+	pinctrl-0 = <&uart0_default>;
+	pinctrl-names = "default";
+};
+
+zephyr_i2c: &i2c1 {
+	status = "okay";
+	pinctrl-0 = <&i2c1_default>;
+	pinctrl-names = "default";
+	clock-frequency = <I2C_BITRATE_FAST>;
+};
+
+&spi1 {
+	pinctrl-0 = <&spi1_default>;
+	pinctrl-names = "default";
+	status = "okay";
+	cs-gpios = <&gpio0 19 GPIO_ACTIVE_LOW>;
+
+	mcp2515: mcp2515@0 {
+		compatible = "microchip,mcp2515";
+		spi-max-frequency = <1000000>;
+		int-gpios = <&gpio0 22 GPIO_ACTIVE_LOW>;
+		status = "okay";
+		reg = <0x0>;
+		osc-freq = <16000000>;
+
+		can-transceiver {
+			max-bitrate = <1000000>;
+		};
+	};
+};
+
+&timer {
+	status = "okay";
+};
+
+&wdt0 {
+	status = "okay";
+};
+
+&adc {
+	status = "okay";
+	pinctrl-0 = <&adc_default>;
+	pinctrl-names = "default";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+
+	channel@1 {
+		reg = <1>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+
+	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>;
+	};
+};
+
+&pio0 {
+	status = "okay";
+	pio-ws2812 {
+		compatible = "worldsemi,ws2812-rpi_pico-pio";
+		status = "okay";
+		pinctrl-0 = <&ws2812_pio0_default>;
+		pinctrl-names = "default";
+		bit-waveform = <3>, <3>, <4>;
+
+		ws2812: ws2812 {
+			status = "okay";
+			gpios = <&gpio0 21 GPIO_ACTIVE_HIGH>;
+			chain-length = <1>;
+			color-mapping = <LED_COLOR_ID_GREEN
+					LED_COLOR_ID_RED
+					LED_COLOR_ID_BLUE>;
+			reset-delay = <280>;
+			frequency = <800000>;
+		};
+	};
+};
+
+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>;
+};

boards/adafruit/feather_canbus_rp2040/adafruit_feather_canbus_rp2040.yaml

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+identifier: adafruit_feather_canbus_rp2040
+name: Adafruit Feather RP2040 Adalogger
+type: mcu
+arch: arm
+flash: 8192
+ram: 264
+toolchain:
+  - zephyr
+  - gnuarmemb
+supported:
+  - adc
+  - can
+  - clock
+  - counter
+  - dma
+  - flash
+  - gpio
+  - hwinfo
+  - i2c
+  - pwm
+  - spi
+  - uart
+  - watchdog

boards/adafruit/feather_canbus_rp2040/adafruit_feather_canbus_rp2040_defconfig

@@ -0,0 +1,13 @@
+# Copyright (c) 2025 Jonas Berg
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_BUILD_OUTPUT_UF2=y
+CONFIG_CLOCK_CONTROL=y
+CONFIG_GPIO=y
+CONFIG_PIO_RPI_PICO=y
+CONFIG_RESET=y
+CONFIG_USE_DT_CODE_PARTITION=y
+CONFIG_SERIAL=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y

boards/adafruit/feather_canbus_rp2040/board.cmake

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
+# Copyright (c) 2023 TOKITA Hiroshi
+
+board_runner_args(uf2 "--board-id=RPI-RP2")
+
+include(${ZEPHYR_BASE}/boards/common/uf2.board.cmake)

boards/adafruit/feather_canbus_rp2040/board.yml

@@ -0,0 +1,6 @@
+board:
+  name: adafruit_feather_canbus_rp2040
+  full_name: Feather RP2040 CAN bus
+  vendor: adafruit
+  socs:
+  - name: rp2040