Initial import

boards/heltec/heltec_wifi_lora32_v4/Kconfig.defconfig

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+if BOARD_HELTEC_WIFI_LORA32_V4
+
+config BOARD
+	default "heltec_wifi_lora32_v4"
+
+endif # BOARD_HELTEC_WIFI_LORA32_V4

boards/heltec/heltec_wifi_lora32_v4/Kconfig.heltec_wifi_lora32_v4

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+config BOARD_HELTEC_WIFI_LORA32_V4
+	select SOC_ESP32S3_PROCPU if BOARD_HELTEC_WIFI_LORA32_V4_PROCPU
+	select SOC_ESP32S3_APPCPU if BOARD_HELTEC_WIFI_LORA32_V4_APPCPU

boards/heltec/heltec_wifi_lora32_v4/board.cmake

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+# Heltec WiFi LoRa 32 V4 — board.cmake
+# Uses esptool for flashing over USB-C (direct ESP32-S3 USB)
+include(${ZEPHYR_BASE}/boards/espressif/common/board.cmake)

boards/heltec/heltec_wifi_lora32_v4/board.yml

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+board:
+  name: heltec_wifi_lora32_v4
+  full_name: "Heltec WiFi LoRa 32 V4"
+  vendor: heltec
+  url: https://heltec.org/project/wifi-lora-32-v4/
+  socs:
+    - name: esp32s3
+      variants:
+        - name: procpu
+        - name: appcpu

boards/heltec/heltec_wifi_lora32_v4/heltec_wifi_lora32_v4-pinctrl.dtsi

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+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Heltec WiFi LoRa 32 V4 — pin control definitions
+ */
+
+#include <zephyr/dt-bindings/pinctrl/esp-pinctrl-common.h>
+#include <dt-bindings/pinctrl/esp32s3-pinctrl.h>
+#include <zephyr/dt-bindings/pinctrl/esp32s3-gpio-sigmap.h>
+
+&pinctrl {
+	spim2_default: spim2_default {
+		group1 {
+			pinmux = <SPIM2_MISO_GPIO11>,
+				 <SPIM2_SCLK_GPIO9>,
+				 <SPIM2_CSEL_GPIO8>;
+		};
+		group2 {
+			pinmux = <SPIM2_MOSI_GPIO10>;
+			output-enable;
+		};
+	};
+};

boards/heltec/heltec_wifi_lora32_v4/heltec_wifi_lora32_v4_procpu.dts

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+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Heltec WiFi LoRa 32 V4 — Device Tree Source (PROCPU)
+ *
+ * Based on Heltec WiFi LoRa 32 V3 with the following differences:
+ *   - No CP2102 USB-UART bridge; direct ESP32-S3 USB-C
+ *   - Console routed to usb_serial instead of uart0
+ */
+
+/dts-v1/;
+#include <espressif/esp32s3/esp32s3_fn8r2.dtsi>
+#include "heltec_wifi_lora32_v4-pinctrl.dtsi"
+#include <zephyr/dt-bindings/input/input-event-codes.h>
+
+/ {
+	model = "Heltec WiFi LoRa 32 V4 PROCPU";
+	compatible = "heltec,wifi-lora-32-v4";
+
+	chosen {
+		zephyr,sram      = &sram0;
+		zephyr,flash     = &flash0;
+		zephyr,console   = &usb_serial;
+		zephyr,shell-uart = &usb_serial;
+		zephyr,flash-controller = &flash;
+	};
+
+	aliases {
+		lora0 = &lora;
+		led0  = &led_white;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led_white: led_0 {
+			/* V4 LED pin — verify from schematic */
+			gpios = <&gpio0 35 GPIO_ACTIVE_HIGH>;
+			label = "White LED";
+		};
+	};
+
+	buttons {
+		compatible = "gpio-keys";
+		boot_button: button_0 {
+			gpios = <&gpio0 0 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+			label = "Boot Button";
+			zephyr,code = <INPUT_KEY_0>;
+		};
+	};
+};
+
+&usb_serial {
+	status = "okay";
+};
+
+&uart0 {
+	status = "disabled";
+};
+
+&spi2 {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells    = <0>;
+	pinctrl-0      = <&spim2_default>;
+	pinctrl-names  = "default";
+	cs-gpios       = <&gpio0 8 GPIO_ACTIVE_LOW>;
+
+	lora: lora@0 {
+		compatible        = "semtech,sx1262";
+		reg               = <0>;
+		spi-max-frequency = <4000000>;
+		reset-gpios       = <&gpio0 12 (GPIO_OPEN_DRAIN | GPIO_ACTIVE_LOW)>;
+		busy-gpios        = <&gpio0 13 GPIO_ACTIVE_HIGH>;
+		dio1-gpios        = <&gpio0 14 GPIO_ACTIVE_HIGH>;
+		dio2-tx-enable;
+		tcxo-power-startup-delay-ms = <5>;
+	};
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&flash0 {
+	status = "okay";
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells    = <1>;
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg   = <0x00000000 0x00010000>;
+		};
+		slot0_partition: partition@10000 {
+			label = "image-0";
+			reg   = <0x00010000 0x00300000>;
+		};
+		slot1_partition: partition@310000 {
+			label = "image-1";
+			reg   = <0x00310000 0x00300000>;
+		};
+		storage_partition: partition@610000 {
+			label = "storage";
+			reg   = <0x00610000 0x001f0000>;
+		};
+	};
+};

boards/heltec/heltec_wifi_lora32_v4/heltec_wifi_lora32_v4_procpu_defconfig

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+CONFIG_SOC_SERIES_ESP32S3=y
+CONFIG_BOARD_HELTEC_WIFI_LORA32_V4=y
+CONFIG_FLASH=y
+CONFIG_FLASH_MAP=y
+CONFIG_UART_CONSOLE=y
+CONFIG_SPI=y
+CONFIG_GPIO=y