boards: nuvoton: add support for numaker m55m1

Add new development board numaker_gai_m55m1 for m55m1x series.

Signed-off-by: cyliang tw <cyliang@nuvoton.com>

boards/nuvoton/numaker_gai_m55m1/Kconfig.numaker_gai_m55m1

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# Nuvoton NuMaker NUGESTUREAI M55M1 board configuration
+#
+# Copyright (c) 2026 Nuvoton Technology Corporation.
+
+config BOARD_NUMAKER_GAI_M55M1
+	select SOC_M55M1XXX

boards/nuvoton/numaker_gai_m55m1/board.cmake

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(pyocd "--target=m55m1h2ljae")
+
+include(${ZEPHYR_BASE}/boards/common/pyocd.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)

boards/nuvoton/numaker_gai_m55m1/board.yml

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+board:
+  name: numaker_gai_m55m1
+  full_name: NUMAKER NUGESTUREAI M55M1
+  vendor: nuvoton
+  socs:
+  - name: m55m1xxx

boards/nuvoton/numaker_gai_m55m1/doc/index.rst

@@ -0,0 +1,88 @@
+.. zephyr:board:: numaker_gai_m55m1
+
+Overview
+********
+
+The NuMaker M55M1 is an Internet of Things (IoT) application focused platform
+specially developed by Nuvoton. The NuGestureAI-M55M1 is based on the NuMicro® M55M1
+series MCU with ARM® -Cortex®-M55 core.
+
+Features
+========
+- 32-bit Arm Cortex®-M55 M55M1H2LJAE MCU
+- Core clock up to 220 MHz
+- 2 MB embedded Dual Bank Flash and 1344 KB SRAM
+- 128 KB DTCM and 64 KB ITCM
+- USB 2.0 Full-Speed OTG / Device
+- USB 1.1 Host
+- One push-button is for reset
+- Two LEDs: one is for power indication and the other is for user-defined
+- One SWD connector
+
+More information about the board can be found at the `NuMaker M55M1 User Manual`_.
+
+Supported Features
+==================
+
+.. zephyr:board-supported-hw::
+
+The on-board 12-MHz crystal allows the device to run at its maximum operating speed of 220 MHz.
+
+More details about the supported peripherals are available in `M55M1 TRM`_
+
+Building and Flashing
+*********************
+
+.. zephyr:board-supported-runners::
+
+Flashing
+========
+
+Here is an example for the :zephyr:code-sample:`hello_world` application.
+
+On board debugger Nu-link2 can emulate UART0 as a virtual COM port over usb,
+To enable this, set ISW1 DIP switch 1-3 (TXD RXD VOM) to ON.
+Connect the NuMaker-M55M1 to your host computer using the USB port, then
+run a serial host program to connect with your board. For example:
+
+.. code-block:: console
+
+   $ minicom -D /dev/ttyACM0
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: numaker_gai_m55m1
+   :goals: flash
+
+Debugging
+=========
+
+Here is an example for the :zephyr:code-sample:`hello_world` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: numaker_gai_m55m1
+   :goals: debug
+
+Step through the application in your debugger.
+
+VS Code Support
+===============
+
+Here is to go through VS Code instead of command line.
+
+Please install Nuvoton NuMicro Cortex-M Pack and follow getting start guide of this pack.
+This pack is a complete development toolkit for Nuvoton’s NuMicro Cortex-M microcontrollers
+in Visual Studio Code.
+URL of this pack is
+https://marketplace.visualstudio.com/items?itemName=Nuvoton.nuvoton-numicro-cortex-m-pack
+
+References
+**********
+
+.. target-notes::
+
+.. _NuMaker M55M1 User Manual:
+   https://www.nuvoton.com/products/microcontrollers/arm-cortex-m55-mcus/m55m1-series/
+.. _M55M1 TRM:
+   https://www.nuvoton.com/products/microcontrollers/arm-cortex-m55-mcus/m55m1-series/

boards/nuvoton/numaker_gai_m55m1/numaker_gai_m55m1-pinctrl.dtsi

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2026 Nuvoton Technology Corporation.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "pinctrl/m55m1h2l-pinctrl.h"
+
+&pinctrl {
+	uart5_default: uart5_default {
+		group0 {
+			pinmux = <PB4MFP_UART5_RXD>,
+				 <PB5MFP_UART5_TXD>;
+		};
+	};
+
+	uart2_default: uart2_default {
+		group0 {
+			pinmux = <PB0MFP_UART2_RXD>,
+				 <PB1MFP_UART2_TXD>;
+		};
+	};
+};

boards/nuvoton/numaker_gai_m55m1/numaker_gai_m55m1.dts

@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2026 Nuvoton Technology Corporation.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include <nuvoton/m55m1h2l.dtsi>
+#include "numaker_gai_m55m1-pinctrl.dtsi"
+#include <zephyr/dt-bindings/input/input-event-codes.h>
+
+/ {
+	model = "Nuvoton NuMaker GestureAI M55M1 board";
+	compatible = "nuvoton,numaker-m55m1";
+
+	aliases {
+		led0 = &yellow_led;
+		sw0 = &btn0;
+	};
+
+	chosen {
+		zephyr,console = &uart5;
+		zephyr,shell-uart = &uart5;
+		zephyr,sram = &sram0;
+		zephyr,dtcm = &dtcm;
+		zephyr,itcm = &itcm;
+		zephyr,flash = &flash0;
+		zephyr,code-partition = &slot0_partition;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		yellow_led: led_0 {
+			gpios = <&gpioa 7 GPIO_ACTIVE_LOW>;
+			label = "User LD0";
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+
+		btn0: btn0 {
+			label = "BTN0";
+			gpios = <&gpioa 4 GPIO_ACTIVE_LOW>;
+			zephyr,code = <INPUT_KEY_0>;
+		};
+	};
+};
+
+&scc {
+	lxt = "disable";
+	hxt = "enable";
+};
+
+&gpioa {
+	status = "okay";
+};
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x0 0xfe00>;
+		};
+
+		slot0_partition: partition@fe00 {
+			label = "image-0";
+			reg = <0xfe00 0xf4000>;
+		};
+
+		slot1_partition: partition@103e00 {
+			label = "image-1";
+			reg = <0x103e00 0xf4000>;
+		};
+
+		storage_partition: partition@1f7e00 {
+			label = "storage";
+			reg = <0x1f7e00 0x8200>;
+		};
+	};
+};
+
+&sram0 {
+	reg = <0x20100000 DT_SIZE_K(1344)>;
+};
+
+&uart5 {
+	current-speed = <115200>;
+	pinctrl-0 = <&uart5_default>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+/* On enabled, husbd phy is required HXT. */
+zephyr_udc0: &hsusbd {
+	/* Needn't pinctrl for pins being dedicated */
+	status = "okay";
+};

boards/nuvoton/numaker_gai_m55m1/numaker_gai_m55m1.yaml

@@ -0,0 +1,16 @@
+# Copyright (c) 2026 Nuvoton Technology Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+identifier: numaker_gai_m55m1
+name: NUVOTON NUMAKER-GAI-M55M1 Kit
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+ram: 1536
+flash: 2048
+supported:
+  - gpio
+  - usb
+vendor: nuvoton

boards/nuvoton/numaker_gai_m55m1/numaker_gai_m55m1_defconfig

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_GPIO=y
+
+# Enable system clock controller driver
+CONFIG_CLOCK_CONTROL=y
+CONFIG_CLOCK_CONTROL_NUMAKER_SCC=y
+
+# Enable UART driver
+CONFIG_SERIAL=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+
+# Console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y

boards/nuvoton/numaker_gai_m55m1/support/openocd.cfg

@@ -0,0 +1,2 @@
+source [find interface/nulink.cfg]
+source [find target/numicro.cfg]

west.yml

@@ -205,7 +205,7 @@ manifest:
       groups:
         - hal
     - name: hal_nuvoton
-      revision: 602db600cae5275ab0946de696a6068d769a6b3d
+      revision: 8f1bf948a94cf59926ea7b686985e1d6c6f954c7
       path: modules/hal/nuvoton
       groups:
         - hal