boards: ruiside: art-pi2: add minimum support

- introduced a new vendor ruiside, updated
`dts/bindings/vendor-prefixes.txt`
- add art-pi2 board basic support

Signed-off-by: Shan Pen <bricle031@gmail.com>

boards/ruiside/art_pi2/Kconfig.art_pi2

@@ -0,0 +1,5 @@
+# Copyright (c) 2025 Shan Pen <bricle031@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_ART_PI2
+	select SOC_STM32H7R7XX

boards/ruiside/art_pi2/art_pi2.dts

@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2025 Shan Pen <bricle031@gmail.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <st/h7rs/stm32h7r7X8.dtsi>
+#include <st/h7/stm32h7r7l8hxh-pinctrl.dtsi>
+#include <zephyr/dt-bindings/input/input-event-codes.h>
+
+/ {
+	model = "Ruiside Electronic ART-Pi2 board";
+	compatible = "ruiside,art-pi2";
+
+	chosen {
+		zephyr,console = &uart4;
+		zephyr,shell-uart = &uart4;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+	};
+
+	leds: leds {
+		compatible = "gpio-leds";
+
+		red_led: led_1 {
+			gpios = <&gpioo 1 GPIO_ACTIVE_HIGH>;
+			label = "User LED1";
+		};
+
+		blue_led: led_2 {
+			gpios = <&gpioo 5 GPIO_ACTIVE_LOW>;
+			label = "User LED2";
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+
+		user_button: button_0 {
+			label = "User";
+			gpios = <&gpioc 13 GPIO_ACTIVE_LOW>;
+			zephyr,code = <INPUT_KEY_0>;
+		};
+	};
+
+	aliases {
+		led0 = &red_led;
+		led1 = &blue_led;
+		sw0 = &user_button;
+		watchdog0 = &iwdg;
+		die-temp0 = &die_temp;
+		volt-sensor0 = &vref;
+		volt-sensor1 = &vbat;
+	};
+};
+
+&dtcm {
+	reg = <0x20000000 DT_SIZE_K(64)>;
+};
+
+&clk_hsi48 {
+	status = "okay";
+};
+
+&clk_hse {
+	clock-frequency = <DT_FREQ_M(24)>;
+	status = "okay";
+};
+
+&pll {
+	div-m = <12>;
+	mul-n = <250>;
+	div-p = <2>;
+	div-q = <2>;
+	div-r = <2>;
+	div-s = <2>;
+	div-t = <2>;
+	clocks = <&clk_hse>;
+	status = "okay";
+};
+
+&rcc {
+	clocks = <&pll>;
+	clock-frequency = <DT_FREQ_M(250)>;
+	dcpre = <1>;
+	hpre = <1>;
+	ppre1 = <2>;
+	ppre2 = <2>;
+	ppre4 = <2>;
+	ppre5 = <2>;
+};
+
+&uart4 {
+	pinctrl-0 = <&uart4_tx_pd1 &uart4_rx_pd0>;
+	pinctrl-names = "default";
+	current-speed = <115200>;
+	status = "okay";
+};
+
+&rng {
+	status = "okay";
+};
+
+&iwdg {
+	status = "okay";
+};
+
+&wwdg {
+	status = "okay";
+};
+
+&vref {
+	status = "okay";
+};
+
+&vbat {
+	status = "okay";
+};

boards/ruiside/art_pi2/art_pi2.yaml

@@ -0,0 +1,14 @@
+identifier: art_pi2
+name: art pi2
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+ram: 640
+flash: 64
+supported:
+  - gpio
+  - uart
+  - watchdog
+  - entropy
+vendor: ruiside

boards/ruiside/art_pi2/art_pi2_defconfig

@@ -0,0 +1,20 @@
+# Copyright (c) 2025 Shan Pen <bricle031@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+# Enable SMPS
+CONFIG_POWER_SUPPLY_DIRECT_SMPS=y
+
+# Enable MPU
+CONFIG_ARM_MPU=y
+
+# Enable HW stack protection
+CONFIG_HW_STACK_PROTECTION=y
+
+# Enable UART driver
+CONFIG_SERIAL=y
+# Enable console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+# Enable GPIO
+CONFIG_GPIO=y

boards/ruiside/art_pi2/board.cmake

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: Apache-2.0
+
+# keep first
+board_runner_args(stm32cubeprogrammer "--port=swd" "--reset-mode=hw")
+board_runner_args(pyocd "--target=stm32h7r7l8hxh")
+
+# keep first
+include(${ZEPHYR_BASE}/boards/common/stm32cubeprogrammer.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/pyocd.board.cmake)

boards/ruiside/art_pi2/board.yml

@@ -0,0 +1,6 @@
+board:
+  name: art_pi2
+  full_name: ART-Pi2
+  vendor: ruiside
+  socs:
+    - name: stm32h7r7xx

boards/ruiside/art_pi2/doc/index.rst

@@ -0,0 +1,163 @@
+.. zephyr:board:: art_pi2
+
+Overview
+********
+
+The ART-Pi2 is an open-source hardware platform designed by the
+RT-Thread team specifically for embedded software engineers
+and open-source makers, offering extensive expandability for DIY projects.
+
+Key Features
+
+- STM32H7R7L8HxH microcontroller featuring 64 Kbytes of Flash and 620 Kbytes of SRAM in an TFBGA225 package
+- On-board ST-LINK/V2.1 debugger/programmer
+- SDIO TF Card slot
+- SDIO WIFI:CYWL6208
+- HDC UART BuleTooth:CYWL6208
+- 32-MB HyperRAM
+- 64-MB HyperFlash
+- One Power LED (blue) for 3.3 V power-on
+- Two user LEDs blue and red
+- Two ST-LINK LEDs: blue and red
+- Two push-buttons (user and reset)
+- Board connectors:
+
+  - USB OTG with Type-C connector
+  - RGB888 FPC connector
+
+More information about the board can be found at the `ART-Pi2 website`_.
+
+Hardware
+********
+
+ART-Pi2 provides the following hardware components:
+
+The STM32H7R7xx devices are a high-performance microcontrollers family (STM32H7
+Series) based on the high-performance Arm |reg| Cortex |reg|-M7 32-bit RISC core.
+They operate at a frequency of up to 600 MHz.
+
+More information about STM32H7R7 can be found here:
+
+- `STM32H7R7L8 on www.st.com`_
+- `STM32H7Rx reference manual`_
+
+
+Supported Features
+==================
+
+.. zephyr:board-supported-hw::
+
+Default Zephyr Peripheral Mapping:
+----------------------------------
+
+The ART-Pi2 board features a On-board ST-LINK/V2.1 debugger/programmer. Board is configured as follows:
+
+- UART4 TX/RX : PD1/PD0 (ST-Link Virtual Port Com)
+- LED1 (red) : PO1
+- LED2 (blue) : PO5
+- USER PUSH-BUTTON : PC13
+
+System Clock
+------------
+
+ART-Pi2 System Clock could be driven by an internal or external
+oscillator, as well as the main PLL clock. By default, the System clock is
+driven by the PLL clock at 250MHz, driven by an 24MHz high-speed external clock.
+
+Serial Port
+-----------
+
+ART-Pi2 board has 4 UARTs and 3 USARTs plus one LowPower UART. The Zephyr console
+output is assigned to UART4. Default settings are 115200 8N1.
+
+Backup SRAM
+-----------
+
+In order to test backup SRAM you may want to disconnect VBAT from VDD. You can
+do it by removing ``SB13`` jumper on the back side of the board.
+
+Programming and Debugging
+*************************
+
+.. zephyr:board-supported-runners::
+
+ART-Pi2 board includes an ST-LINK/V2.1 embedded debug tool interface.
+
+.. note::
+
+   Check if your ST-LINK V2.1 has newest FW version. It can be done with `STM32CubeProgrammer`_
+
+Flashing
+========
+
+The board is configured to be flashed using west `STM32CubeProgrammer`_ runner,
+so its :ref:`installation <stm32cubeprog-flash-host-tools>` is required.
+
+Flashing an application to ART-Pi2
+----------------------------------
+
+First, connect the art_pi2 to your host computer using
+the USB port to prepare it for flashing. Then build and flash your application.
+
+Here is an example for the :zephyr:code-sample:`hello_world` application.
+
+Run a serial host program to connect with your art_pi2 board.
+
+.. code-block:: console
+
+   $ minicom -b 115200 -D /dev/ttyACM0
+
+or use screen:
+
+.. code-block:: console
+
+   $ screen /dev/ttyACM0 115200
+
+Build and flash the application:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: art_pi2
+   :goals: build flash
+
+You should see the following message on the console:
+
+.. code-block:: console
+
+   *** Booting Zephyr OS build v4.1.0-1907-g415ab379a8af ***
+   Hello World! art_pi2/stm32h7r7xx
+
+Blinky example can also be used:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/basic/blinky
+   :board: art_pi2
+   :goals: build flash
+
+Debugging
+=========
+
+You can debug an application in the usual way.  Here is an example for the
+:zephyr:code-sample:`hello_world` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: art_pi2
+   :maybe-skip-config:
+   :goals: debug
+
+References
+**********
+.. target-notes::
+
+.. _ART-Pi2 website:
+   https://github.com/RT-Thread-Studio/sdk-bsp-stm32h7r-realthread-artpi2
+
+.. _STM32H7R7L8 on www.st.com:
+   https://www.st.com/en/microcontrollers-microprocessors/stm32h7r7l8.html
+
+.. _STM32H7Rx reference manual:
+   https://www.st.com/resource/en/reference_manual/rm0477-stm32h7rx7sx-armbased-32bit-mcus-stmicroelectronics.pdf
+
+.. _STM32CubeProgrammer:
+   https://www.st.com/en/development-tools/stm32cubeprog.html

boards/ruiside/index.rst

@@ -0,0 +1,10 @@
+.. _boards-Ruiside:
+
+Ruiside
+#######
+
+.. toctree::
+   :maxdepth: 1
+   :glob:
+
+   **/*

dts/bindings/vendor-prefixes.txt

@@ -582,6 +582,7 @@ ronbo	Ronbo Electronics
 ronoth	Ronoth
 roofull	Shenzhen Roofull Technology Co, Ltd
 roseapplepi	RoseapplePi.org
+ruiside	Shanghai Ruiside Electronic Technology Co., Ltd.
 ruuvi	Ruuvi Innovations Ltd (Oy)
 samsung	Samsung Semiconductor
 samtec	Samtec/Softing company