boards: adafruit: esp32s2_feather: add support

boards/adafruit/feather_esp32s2/CMakeLists.txt

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+# 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
+
+config BOARD_NEEDS_LATE_HOOK
+	bool
+	default y if BOARD_ADAFRUIT_FEATHER_ESP32S2_TFT || BOARD_ADAFRUIT_FEATHER_ESP32S2_TFT_REVERSE
+	select BOARD_LATE_INIT_HOOK

boards/adafruit/feather_esp32s2/Kconfig.adafruit_feather_esp32s2

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+# Copyright (c) 2025 Philipp Steiner <[email protected]>
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_ADAFRUIT_FEATHER_ESP32S2
+	select SOC_ESP32S2_R2

boards/adafruit/feather_esp32s2/Kconfig.adafruit_feather_esp32s2_tft

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+# Copyright (c) 2025 Philipp Steiner <[email protected]>
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_ADAFRUIT_FEATHER_ESP32S2_TFT
+	select SOC_ESP32S2_R2

boards/adafruit/feather_esp32s2/Kconfig.adafruit_feather_esp32s2_tft_reverse

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+# Copyright (c) 2025 Philipp Steiner <[email protected]>
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_ADAFRUIT_FEATHER_ESP32S2_TFT_REVERSE
+	select SOC_ESP32S2_R2

boards/adafruit/feather_esp32s2/Kconfig.defconfig

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+# Copyright (c) 2025 Philipp Steiner <[email protected]>
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_ADAFRUIT_FEATHER_ESP32S2_TFT || BOARD_ADAFRUIT_FEATHER_ESP32S2_TFT_REVERSE
+
+if DISPLAY
+
+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_ESP32S2_TFT || BOARD_ADAFRUIT_FEATHER_ESP32S2_TFT_REVERSE

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.dts

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+/*
+ * 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";
+	compatible = "espressif,esp32s2";
+};

boards/adafruit/feather_esp32s2/adafruit_feather_esp32s2_B.overlay

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+/*
+ * Copyright (c) 2025 Philipp Steiner <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	/*
+	 * 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>;
+		startup-delay-us = <10>;
+	};
+};

boards/adafruit/feather_esp32s2/adafruit_feather_esp32s2_B.yaml

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+identifier: adafruit_feather_esp32s2@B
+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
+testing:
+  ignore_tags:
+    - bluetooth

boards/adafruit/feather_esp32s2/adafruit_feather_esp32s2_C.overlay

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+/*
+ * Copyright (c) 2025 Philipp Steiner <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	/*
+	 * On-board regulator 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_HIGH>;
+		startup-delay-us = <10>;
+	};
+};

boards/adafruit/feather_esp32s2/adafruit_feather_esp32s2_C.yaml

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+identifier: adafruit_feather_esp32s2@C
+name: Adafruit Feather ESP32-S2 Rev C
+type: mcu
+arch: xtensa
+toolchain:
+  - zephyr
+supported:
+  - gpio
+  - uart
+  - i2c
+  - spi
+  - counter
+  - watchdog
+  - entropy
+  - pwm
+  - dma
+vendor: adafruit
+testing:
+  ignore_tags:
+    - bluetooth