boards: adafruit: add initial support for esp32 feather v2

boards/adafruit/feather_esp32/Kconfig

@@ -0,0 +1,7 @@
+# Copyright (c) 2025 Lena Voytek <lena@voytek.dev>
+# SPDX-License-Identifier: Apache-2.0
+
+config HEAP_MEM_POOL_ADD_SIZE_BOARD
+	int
+	default 4096 if BOARD_ADAFRUIT_FEATHER_ESP32_ESP32_PROCPU
+	default 256 if BOARD_ADAFRUIT_FEATHER_ESP32_ESP32_APPCPU

boards/adafruit/feather_esp32/Kconfig.adafruit_feather_esp32

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+# Adafruit Feather ESP32 board configuration
+
+# Copyright (c) 2025 Lena Voytek <lena@voytek.dev>
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_ADAFRUIT_FEATHER_ESP32
+	select SOC_ESP32_PICO_V3_02
+	select SOC_ESP32_PROCPU if BOARD_ADAFRUIT_FEATHER_ESP32_ESP32_PROCPU
+	select SOC_ESP32_APPCPU if BOARD_ADAFRUIT_FEATHER_ESP32_ESP32_APPCPU

boards/adafruit/feather_esp32/adafruit_feather_esp32-pinctrl.dtsi

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+/*
+ * Copyright (c) 2025 Lena Voytek <lena@voytek.dev>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/pinctrl/esp-pinctrl-common.h>
+#include <dt-bindings/pinctrl/esp32-pinctrl.h>
+#include <zephyr/dt-bindings/pinctrl/esp32-gpio-sigmap.h>
+
+&pinctrl {
+	uart0_default: uart0_default {
+		group1 {
+			pinmux = <UART0_TX_GPIO1>;
+			output-high;
+		};
+
+		group2 {
+			pinmux = <UART0_RX_GPIO3>;
+			bias-pull-up;
+		};
+	};
+
+	uart1_default: uart1_default {
+		group1 {
+			pinmux = <UART1_TX_GPIO8>;
+			output-high;
+		};
+
+		group2 {
+			pinmux = <UART1_RX_GPIO7>;
+			bias-pull-up;
+		};
+	};
+
+	spim2_default: spim2_default {
+		group1 {
+			pinmux = <SPIM2_MISO_GPIO21>,
+					<SPIM2_SCLK_GPIO5>;
+		};
+
+		group2 {
+			pinmux = <SPIM2_MOSI_GPIO19>;
+			output-low;
+		};
+	};
+
+	spim3_ws2812_led: spi3_ws2812_led {
+		group1 {
+			pinmux = <SPIM3_MOSI_GPIO0>;
+		};
+	};
+
+	i2c0_default: i2c0_default {
+		group1 {
+			pinmux = <I2C0_SDA_GPIO22>,
+					<I2C0_SCL_GPIO20>;
+			drive-open-drain;
+			output-high;
+		};
+	};
+};

boards/adafruit/feather_esp32/adafruit_feather_esp32_appcpu.dts

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+/*
+ * Copyright (c) 2023 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+/dts-v1/;
+
+#include <espressif/esp32/esp32_appcpu.dtsi>
+#include <espressif/partitions_0x1000_amp.dtsi>
+
+/ {
+	model = "Adafruit Feather ESP32 APPCPU";
+	compatible = "espressif,esp32";
+
+	chosen {
+		zephyr,sram = &sram1;
+		zephyr,ipc_shm = &shm0;
+		zephyr,ipc = &ipm0;
+		zephyr,flash = &flash0;
+		zephyr,code-partition = &slot0_appcpu_partition;
+	};
+};
+
+&ipm0 {
+	status = "okay";
+};
+
+&trng0 {
+	status = "okay";
+};

boards/adafruit/feather_esp32/adafruit_feather_esp32_appcpu.yaml

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+identifier: adafruit_feather_esp32/esp32/appcpu
+name: Adafruit Feather ESP32 APPCPU
+type: mcu
+arch: xtensa
+toolchain:
+  - zephyr
+supported:
+  - uart
+testing:
+  ignore_tags:
+    - net
+    - bluetooth
+    - flash
+    - cpp
+    - posix
+    - watchdog
+    - logging
+    - kernel
+    - pm
+    - gpio
+    - crypto
+    - eeprom
+    - heap
+    - cmsis_rtos
+    - jwt
+    - zdsp
+vendor: adafruit

boards/adafruit/feather_esp32/adafruit_feather_esp32_appcpu_defconfig

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+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_CLOCK_CONTROL=y

boards/adafruit/feather_esp32/adafruit_feather_esp32_procpu.dts

@@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 2025 Lena Voytek <lena@voytek.dev>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+/dts-v1/;
+
+#include <espressif/esp32/esp32_pico_v3_02.dtsi>
+#include "adafruit_feather_esp32-pinctrl.dtsi"
+#include <zephyr/dt-bindings/input/input-event-codes.h>
+#include <zephyr/dt-bindings/led/led.h>
+#include <zephyr/dt-bindings/led/worldsemi_ws2812c.h>
+#include <espressif/partitions_0x1000_amp.dtsi>
+
+/ {
+	model = "Adafruit Feather ESP32 PROCPU";
+	compatible = "adafruit,adafruit_feather_esp32";
+
+	chosen {
+		zephyr,sram = &sram1;
+		zephyr,console = &uart0;
+		zephyr,shell-uart = &uart0;
+		zephyr,flash = &flash0;
+		zephyr,code-partition = &slot0_partition;
+		zephyr,bt-hci = &esp32_bt_hci;
+	};
+
+	aliases {
+		sw0 = &user_button_0;
+		watchdog0 = &wdt0;
+		i2c-0 = &i2c0;
+		led-strip = &led_strip;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		status = "okay";
+
+		led0: led_0 {
+			label = "Red-LED";
+			gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+
+		user_button_0: button_0 {
+			label = "User button 0";
+			gpios = <&gpio1 6 GPIO_ACTIVE_LOW>; // GPIO 38
+			zephyr,code = <INPUT_KEY_0>;
+		};
+	};
+};
+
+&uart0 {
+	status = "okay";
+	current-speed = <115200>;
+	pinctrl-0 = <&uart0_default>;
+	pinctrl-names = "default";
+};
+
+&uart1 {
+	status = "okay";
+	current-speed = <115200>;
+	pinctrl-0 = <&uart1_default>;
+	pinctrl-names = "default";
+};
+
+&gpio0 {
+	status = "okay";
+
+	neopixel_power_enable {
+		gpio-hog;
+		gpios = <2 GPIO_ACTIVE_HIGH>;
+		output-high;
+	};
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&i2c0 {
+	status = "okay";
+	clock-frequency = <I2C_BITRATE_FAST>;
+	pinctrl-0 = <&i2c0_default>;
+	pinctrl-names = "default";
+	sda-gpios = <&gpio0 22 GPIO_OPEN_DRAIN>;
+	scl-gpios = <&gpio0 20 GPIO_OPEN_DRAIN>;
+
+};
+
+&timer0 {
+	status = "okay";
+};
+
+&timer1 {
+	status = "okay";
+};
+
+&timer2 {
+	status = "okay";
+};
+
+&timer3 {
+	status = "okay";
+};
+
+&trng0 {
+	status = "okay";
+};
+
+&spi2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	pinctrl-0 = <&spim2_default>;
+	pinctrl-names = "default";
+};
+
+/* used for SK6812 */
+&spi3 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+	line-idle-low;
+	pinctrl-0 = <&spim3_ws2812_led>;
+	pinctrl-names = "default";
+
+	led_strip: ws2812@0 {
+		compatible = "worldsemi,ws2812-spi";
+		reg = <0>;
+		spi-max-frequency = <WS2812C_SPI_FREQ>;
+
+		chain-length = <1>;
+		color-mapping =	<LED_COLOR_ID_GREEN>,
+						<LED_COLOR_ID_RED>,
+						<LED_COLOR_ID_BLUE>;
+		spi-one-frame = <WS2812C_ONE_FRAME>;
+		spi-zero-frame = <WS2812C_ZERO_FRAME>;
+	};
+};
+
+&wdt0 {
+	status = "okay";
+};
+
+&esp32_bt_hci {
+	status = "okay";
+};
+
+&wifi {
+	status = "okay";
+};

boards/adafruit/feather_esp32/adafruit_feather_esp32_procpu.yaml

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+identifier: adafruit_feather_esp32/esp32/procpu
+name: Adafruit Feather ESP32 PROCPU
+type: mcu
+arch: xtensa
+toolchain:
+  - zephyr
+supported:
+  - gpio
+  - i2c
+  - spi
+  - watchdog
+  - uart
+  - pinmux
+  - nvs
+  - counter
+  - entropy
+  - pwm
+  - dma
+  - input
+  - feather_serial
+  - feather_i2c
+  - feather_spi
+vendor: adafruit

boards/adafruit/feather_esp32/adafruit_feather_esp32_procpu_defconfig

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_GPIO=y
+CONFIG_CONSOLE=y
+CONFIG_SERIAL=y
+CONFIG_UART_CONSOLE=y

boards/adafruit/feather_esp32/board.cmake

@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: Apache-2.0
+
+if(NOT "${OPENOCD}" MATCHES "^${ESPRESSIF_TOOLCHAIN_PATH}/.*")
+  set(OPENOCD OPENOCD-NOTFOUND)
+endif()
+find_program(OPENOCD openocd PATHS ${ESPRESSIF_TOOLCHAIN_PATH}/openocd-esp32/bin NO_DEFAULT_PATH)
+
+include(${ZEPHYR_BASE}/boards/common/esp32.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)
+
+# the default ESP32 baud rate is not supported
+board_runner_args(esp32 "--esp-baud-rate=1500000")

boards/adafruit/feather_esp32/board.yml

@@ -0,0 +1,11 @@
+board:
+  name: adafruit_feather_esp32
+  full_name: Adafruit Feather ESP32
+  vendor: adafruit
+  socs:
+  - name: esp32
+  revision:
+    format: number
+    default: "2"
+    revisions:
+    - name: "2"