Initial import

boards/heltec/heltec_t114/Kconfig.defconfig

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+if BOARD_HELTEC_T114
+
+config BOARD
+	default "heltec_t114"
+
+endif # BOARD_HELTEC_T114

boards/heltec/heltec_t114/Kconfig.heltec_t114

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+config BOARD_HELTEC_T114
+	select SOC_NRF52840_QIAA

boards/heltec/heltec_t114/board.cmake

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+# Heltec T114 — board.cmake
+# Uses nrfjprog or pyocd for flashing via SWD.
+# The board exposes a SWD header for programming.
+board_runner_args(nrfjprog "--nrf-family=NRF52")
+board_runner_args(pyocd "--target=nrf52840")
+include(${ZEPHYR_BASE}/boards/common/nrfjprog.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/pyocd.board.cmake)

boards/heltec/heltec_t114/board.yml

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+board:
+  name: heltec_t114
+  full_name: "Heltec Mesh Node T114"
+  vendor: heltec
+  url: https://heltec.org/project/mesh-node-t114/
+  socs:
+    - name: nrf52840

boards/heltec/heltec_t114/heltec_t114-pinctrl.dtsi

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+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Heltec T114 — pin control definitions
+ */
+
+#include <nordic/nrf52840.dtsi>
+#include <dt-bindings/pinctrl/nrf-pinctrl.h>
+
+&pinctrl {
+	uart1_default: uart1_default {
+		group1 {
+			psels = <NRF_PSEL(UART_TX, 0, 10)>;
+		};
+		group2 {
+			psels     = <NRF_PSEL(UART_RX, 0, 9)>;
+			bias-pull-up;
+		};
+	};
+
+	uart1_sleep: uart1_sleep {
+		group1 {
+			psels = <NRF_PSEL(UART_TX, 0, 10)>,
+				<NRF_PSEL(UART_RX, 0, 9)>;
+			low-power-enable;
+		};
+	};
+
+	/* SPI1 for LR1110 */
+	spi1_default: spi1_default {
+		group1 {
+			psels = <NRF_PSEL(SPIM_SCK,  0, 19)>,
+				<NRF_PSEL(SPIM_MOSI, 0, 22)>,
+				<NRF_PSEL(SPIM_MISO, 0, 23)>;
+		};
+	};
+
+	spi1_sleep: spi1_sleep {
+		group1 {
+			psels = <NRF_PSEL(SPIM_SCK,  0, 19)>,
+				<NRF_PSEL(SPIM_MOSI, 0, 22)>,
+				<NRF_PSEL(SPIM_MISO, 0, 23)>;
+			low-power-enable;
+		};
+	};
+};

boards/heltec/heltec_t114/heltec_t114.dts

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+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Heltec Mesh Node T114 — Device Tree Source
+ * SoC: nRF52840 QIAAVariant
+ * Radio: SX1262
+ *
+ * NOTE: GPIO pin numbers are placeholders. Verify against the T114
+ * schematic/documentation before using with real hardware.
+ * The T114 uses the nRF52840 SoC in a similar form factor to the
+ * RAK4631, but with different GPIO assignments.
+ */
+
+/dts-v1/;
+#include <nordic/nrf52840_qiaa.dtsi>
+#include "heltec_t114-pinctrl.dtsi"
+
+/ {
+	model = "Heltec Mesh Node T114";
+	compatible = "heltec,mesh-node-t114";
+
+	chosen {
+		zephyr,sram           = &sram0;
+		zephyr,flash          = &flash0;
+		zephyr,code-partition = &slot0_partition;
+	};
+
+	aliases {
+		lora0 = &lora;
+		led0  = &led0;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led0: led_0 {
+			/* TODO: verify LED GPIO from T114 schematic */
+			gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
+			label = "LED 0";
+		};
+	};
+};
+
+&uicr {
+	gpio-as-nreset;
+};
+
+&gpiote {
+	status = "okay";
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&uart1 {
+	compatible = "nordic,nrf-uarte";
+	status = "okay";
+	current-speed = <115200>;
+	pinctrl-0     = <&uart1_default>;
+	pinctrl-1     = <&uart1_sleep>;
+	pinctrl-names = "default", "sleep";
+};
+
+&spi1 {
+	compatible    = "nordic,nrf-spim";
+	status        = "okay";
+	pinctrl-0     = <&spi1_default>;
+	pinctrl-names = "default";
+
+	lora: lora@0 {
+		compatible        = "semtech,sx1262";
+		reg               = <0>;
+		spi-max-frequency = <1000000>;
+		reset-gpios       = <&gpio0 25 GPIO_ACTIVE_LOW>;
+		busy-gpios        = <&gpio0 17 GPIO_ACTIVE_HIGH>;
+		dio1-gpios        = <&gpio0 20 GPIO_ACTIVE_HIGH>;
+		dio2-tx-enable;
+		dio3-tcxo-voltage = <SX126X_DIO3_TCXO_3V3>;
+		tcxo-power-startup-delay-ms = <5>;
+	};
+};
+
+zephyr_udc0: &usbd {
+	compatible = "nordic,nrf-usbd";
+	status = "okay";
+};
+
+&flash0 {
+	partitions {
+		compatible     = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells    = <1>;
+
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg   = <0x00000000 0x0000C000>;
+		};
+		slot0_partition: partition@c000 {
+			label = "image-0";
+			reg   = <0x0000C000 0x00067000>;
+		};
+		slot1_partition: partition@73000 {
+			label = "image-1";
+			reg   = <0x00073000 0x00067000>;
+		};
+		storage_partition: partition@da000 {
+			label = "storage";
+			reg   = <0x000da000 0x00006000>;
+		};
+	};
+};

boards/heltec/heltec_t114/heltec_t114_defconfig

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+CONFIG_SOC_NRF52840_QIAA=y
+CONFIG_BOARD_HELTEC_T114=y
+CONFIG_FLASH=y
+CONFIG_FLASH_MAP=y
+CONFIG_GPIO=y
+CONFIG_SPI=y
+CONFIG_USB_DEVICE_STACK=y
+CONFIG_NRFX_POWER=y