boards: adafruit: esp32s2_feather: add support

add board support for adafruit_esp32s2_feather series

Signed-off-by: Philipp Steiner <[email protected]>

Author: DBS06

boards/adafruit/feather_esp32s2/CMakeLists.txt

@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+zephyr_library_sources(board.c)

boards/adafruit/feather_esp32s2/Kconfig

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+# Copyright (c) 2023 Google, LLC
+# SPDX-License-Identifier: Apache-2.0
+
+config HEAP_MEM_POOL_ADD_SIZE_BOARD
+	int
+	default 4096

boards/adafruit/feather_esp32s2/Kconfig.adafruit_feather

@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_ADAFRUIT_FEATHER
+	select SOC_ESP32S2_R2

boards/adafruit/feather_esp32s2/Kconfig.defconfig

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+# Copyright (c) 2024 Leon Rinkel <[email protected]>
+# Copyright (c) 2025 Philipp Steiner <[email protected]>
+# SPDX-License-Identifier: Apache-2.0
+
+config ENTROPY_GENERATOR
+	default y
+
+if BOARD_ADAFRUIT_FEATHER
+
+if DISPLAY
+
+config BOARD_ADAFRUIT_FEATHER
+ 	select BOARD_LATE_INIT_HOOK
+
+select BOARD_LATE_INIT_HOOK
+
+choice ST7789V_PIXEL_FORMAT
+	default ST7789V_RGB565
+endchoice
+
+if LVGL
+
+config LV_Z_BITS_PER_PIXEL
+	default 16
+
+choice LV_COLOR_DEPTH
+	default LV_COLOR_DEPTH_16
+endchoice
+
+config LV_COLOR_16_SWAP
+	default y
+
+endif # LVGL
+
+endif # DISPLAY
+
+endif # BOARD_ADAFRUIT_FEATHER

boards/adafruit/feather_esp32s2/Kconfig.sysbuild

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+# Copyright (c) 2023 Espressif Systems (Shanghai) Co., Ltd.
+# SPDX-License-Identifier: Apache-2.0
+
+choice BOOTLOADER
+	default BOOTLOADER_MCUBOOT
+endchoice
+
+choice BOOT_SIGNATURE_TYPE
+	default BOOT_SIGNATURE_TYPE_NONE
+endchoice

boards/adafruit/feather_esp32s2/adafruit_feather_esp32s2-pinctrl.dtsi

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+/*
+ * Copyright (c) 2025 Philipp Steiner <[email protected]>.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/pinctrl/esp-pinctrl-common.h>
+#include <dt-bindings/pinctrl/esp32s2-pinctrl.h>
+#include <zephyr/dt-bindings/pinctrl/esp32s2-gpio-sigmap.h>
+
+&pinctrl {
+
+	/*  Debug TX (DBG) - This is the hardware UART debug pin */
+	uart0_default: uart0_default {
+		group1 {
+			pinmux = <UART0_TX_GPIO43>;
+			output-high;
+		};
+	};
+
+	uart1_default: uart1_default {
+		group1 {
+			pinmux = <UART1_TX_GPIO39>;
+			output-high;
+		};
+		group2 {
+			pinmux = <UART1_RX_GPIO38>;
+			bias-pull-up;
+		};
+	};
+
+	spim2_default: spim2_default {
+		group1 {
+			pinmux = <SPIM2_MISO_GPIO37>,
+				 <SPIM2_SCLK_GPIO36>,
+				 <SPIM2_CSEL_GPIO7>;
+		};
+		group2 {
+			pinmux = <SPIM2_MOSI_GPIO35>;
+			output-low;
+		};
+	};
+
+	spim3_ws2812_led: spim3_ws2812_led {
+		group1 {
+			pinmux = <SPIM3_MOSI_GPIO33>;
+		};
+	};
+
+	i2c0_default: i2c0_default {
+		group1 {
+			pinmux = <I2C0_SDA_GPIO3>,
+				 <I2C0_SCL_GPIO4>;
+			drive-open-drain;
+			output-high;
+		};
+	};
+
+	twai_default: twai_default {
+		group1 {
+			pinmux = <TWAI_TX_GPIO5>,
+				 <TWAI_RX_GPIO6>;
+		};
+	};
+};

boards/adafruit/feather_esp32s2/adafruit_feather_esp32s2_common.dtsi

@@ -0,0 +1,161 @@
+/*
+ * Copyright (c) 2025 Philipp Steiner <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+ /dts-v1/;
+
+ #include <espressif/esp32s2/esp32s2_wroom.dtsi>
+ #include "adafruit_feather_esp32s2-pinctrl.dtsi"
+ #include <espressif/partitions_0x1000_default.dtsi>
+ #include <zephyr/dt-bindings/input/input-event-codes.h>
+ #include <dt-bindings/led/led.h>
+ #include <dt-bindings/led/worldsemi_ws2812c.h>
+  #include <zephyr/dt-bindings/mipi_dbi/mipi_dbi.h>
+
+/ {
+	compatible = "espressif,esp32s2";
+
+	chosen {
+		zephyr,sram = &sram1;
+		/*
+		 * uart1 is used as the default uart for zephyr,console and zephyr,shell,
+		 * because USB-OTG is until now not supported and USB-CDC is not available for ESP32-S2.
+		 * See issue #29394 - ESP32 development overview
+		 * To use uart1 a FTDI-USB-RS232 or similar needs to be connected to the RX/TX pins.
+		 * See feather_connector.dtsi
+		 */
+		zephyr,console = &uart1;
+		zephyr,shell-uart = &uart1;
+		zephyr,flash = &flash0;
+		zephyr,code-partition = &slot0_partition;
+	};
+
+	aliases {
+		led0 = &led0;
+		i2c-0 = &i2c0;
+		sw0 = &user_button;
+		led-strip = &led_strip;
+		watchdog0 = &wdt0;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		status = "okay";
+
+		led0: led_0 {
+			label = "Red-LED";
+			gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+		status = "okay";
+		user_button: user_button {
+			label = "BOOT Button";
+			gpios = <&gpio0 0 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+			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 = <21 GPIO_ACTIVE_HIGH>;
+		output-high;
+	};
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&timer0 {
+	status = "okay";
+};
+
+&timer1 {
+	status = "okay";
+};
+
+&timer2 {
+	status = "okay";
+};
+
+&timer3 {
+	status = "okay";
+};
+
+&i2c0 {
+	status = "okay";
+	clock-frequency = <I2C_BITRATE_STANDARD>;
+	pinctrl-0 = <&i2c0_default>;
+	pinctrl-names = "default";
+};
+
+&trng0 {
+	status = "okay";
+};
+
+&spi2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+	pinctrl-0 = <&spim2_default>;
+	pinctrl-names = "default";
+};
+
+&spi3 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+	pinctrl-0 = <&spim3_ws2812_led>;
+	pinctrl-names = "default";
+
+	line-idle-low;
+
+	led_strip: ws2812@0 {
+		compatible = "worldsemi,ws2812-spi";
+
+		/* SPI */
+		reg = <0>; /* ignored, but necessary for SPI bindings */
+		spi-max-frequency = <6400000>;
+
+		/* WS2812 */
+		chain-length = <1>;
+		spi-cpha;
+		spi-one-frame = <WS2812C_ONE_FRAME>; /* 11110000: 625 ns high and 625 ns low */
+		spi-zero-frame = <WS2812C_ZERO_FRAME>; /* 11000000: 312.5 ns high and 937.5 ns low */
+		color-mapping = <LED_COLOR_ID_GREEN>,
+				<LED_COLOR_ID_RED>,
+				<LED_COLOR_ID_BLUE>;
+	};
+};
+
+
+&twai {
+	pinctrl-0 = <&twai_default>;
+	pinctrl-names = "default";
+};
+
+&wdt0 {
+	status = "okay";
+};

boards/adafruit/feather_esp32s2/adafruit_feather_esp32s2_revb.dts

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2025 Philipp Steiner <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include "adafruit_feather_esp32s2_common.dtsi"
+#include "feather_connector.dtsi"
+
+/ {
+	model = "Adafruit Feather ESP32-S2 Rev B";
+	compatible = "adafruit,feather-esp32s2-revb";
+
+	/*
+	 * On-board transistor powers I2C pull-ups and external devices connected
+	 * via the STEMMA QT connector.
+	 */
+	i2c_reg: i2c_reg {
+		label = "I2C Power";
+		compatible = "power-domain-gpio";
+		#power-domain-cells = <0>;
+		enable-gpios = <&gpio0 7 GPIO_ACTIVE_LOW>;
+	};
+};

boards/adafruit/feather_esp32s2/adafruit_feather_esp32s2_revb.yaml

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+identifier: adafruit_feather_esp32s2/revb
+name: Adafruit Feather ESP32-S2 Rev B
+type: mcu
+arch: xtensa
+toolchain:
+  - zephyr
+supported:
+  - gpio
+  - uart
+  - i2c
+  - spi
+  - counter
+  - watchdog
+  - entropy
+  - pwm
+  - dma
+vendor: adafruit

boards/adafruit/feather_esp32s2/adafruit_feather_esp32s2_revb_defconfig

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+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_MAIN_STACK_SIZE=2048
+CONFIG_CONSOLE=y
+CONFIG_SERIAL=y
+CONFIG_UART_CONSOLE=y
+CONFIG_GPIO=y
+CONFIG_CLOCK_CONTROL=y