boards: realtek: Add rts5912_evb board

Add support for Realtek rts5912_evb board

Signed-off-by: Lin Yu-Cheng <lin_yu_cheng@realtek.com>

boards/realtek/index.rst

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+.. _boards-realtek:
+
+Realtek
+#######
+
+.. toctree::
+   :maxdepth: 1
+   :glob:
+
+   **/*

boards/realtek/rts5912_evb/Kconfig.defconfig

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+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2024 Realtek Semiconductor Corporation, SIBG-SD7
+#

boards/realtek/rts5912_evb/Kconfig.rts5912_evb

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+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2024 Realtek Semiconductor Corporation, SIBG-SD7
+#
+
+config BOARD_RTS5912_EVB
+	select SOC_RTS5912

boards/realtek/rts5912_evb/board.cmake

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+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2024 Realtek Semiconductor Corporation, SIBG-SD7
+#
+
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)

boards/realtek/rts5912_evb/board.yml

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+board:
+  name: rts5912_evb
+  vendor: realtek
+  socs:
+  - name: rts5912

boards/realtek/rts5912_evb/doc/rts5912_evb.rst

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+.. _rts5912_evb:
+
+Realtek RTS5912 Evaluation Board
+################################
+
+Overview
+********
+
+The RTS5912 EVB is a development platform to evaluate the Realtek RTS5912 embedded controller.
+
+.. figure:: rts5912evb.webp
+   :width: 800px
+   :align: center
+   :alt: RTS5912-GR EVB
+
+Hardware
+********
+
+- Realtek-M300 Processor (compatible to Cortex-M33)
+- Memory:
+
+   - 384 KB SRAM
+   - 64 KB ROM
+   - 512 KB Flash(MCM)
+   - 256 B Battery SRAM
+- PECI interface 3.1
+- FAN, PWM and TACHO pins
+- 6x I2C instances
+- eSPI header
+- 1x PS/2 ports
+- Keyboard interface headers
+
+For more information about the evb board please see `RTS5912_EVB_Schematics`_ and `RTS5912_DATASHEET`_
+
+The board is powered through the +5V USB Type-C connector or adaptor.
+
+Supported Features
+==================
+
+The ``rts5912_evb`` supports the following hardware features:
+
++-----------+------------+-------------------------------------+
+| Interface | Controller | Driver/Component                    |
++===========+============+=====================================+
+| NVIC      | on-chip    | nested vector interrupt controller  |
++-----------+------------+-------------------------------------+
+| UART      | on-chip    | serial                              |
++-----------+------------+-------------------------------------+
+| GPIO      | on-chip    | gpio                                |
++-----------+------------+-------------------------------------+
+| PINCTRL   | on-chip    | pinctrl                             |
++-----------+------------+-------------------------------------+
+| SCCON     | on-chip    | clock_control                       |
++-----------+------------+-------------------------------------+
+| RTMR      | on-chip    | timer                               |
++-----------+------------+-------------------------------------+
+
+Other hardware features are not currently supported by Zephyr.
+
+Programming and Debugging
+*************************
+
+Building
+========
+
+#. Build :zephyr:code-sample:`hello_world` application as you would normally do.
+
+#. The file ``zephyr.rts5912.bin`` will be created if the build system can build successfully.
+   This binary image can be found under file "build/zephyr/".
+
+Flashing
+========
+
+#. Connect Dediprog into header ``J81`` and ``J82``.
+#. Use Dediprog SF600 programmer to write the binary into the external flash ``U10`` at the address 0x0.
+#. Power off the board.
+#. Set the strap pin ``GPIO108`` to high and power on the board.
+
+Debugging
+=========
+
+Using SWD or JTAG with ULINPRO.
+
+References
+**********
+
+.. target-notes::
+
+.. _RTS5912_EVB_Schematics:
+    https://github.com/JasonLin-RealTek/Realtek_EC/blob/main/RTS5912_EVB_Schematic_Ver%201.1_20240701_1407.pdf
+
+.. _RTS5912_DATASHEET:
+   https://github.com/JasonLin-RealTek/Realtek_EC/blob/main/RTS5912_datasheet_brief.pdf

boards/realtek/rts5912_evb/rts5912_evb.dts

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+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright (c) 2024 Realtek Semiconductor Corporation, SIBG-SD7
+ *
+ */
+
+/dts-v1/;
+#include <realtek/ec/rts5912.dtsi>
+#include <realtek/ec/rts5912-pinctrl.dtsi>
+#include <zephyr/dt-bindings/gpio/gpio.h>
+/ {
+	model = "Realtek RTS5912 Evaluation Board";
+	compatible = "realtek,rts5912-evb";
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,console = &uart0;
+		zephyr,flash = &flash0;
+	};
+};
+
+&uart0 {
+	status = "okay";
+	current-speed = <115200>;
+};
+
+&uart0_wrapper {
+	status = "okay";
+	pinctrl-0 = <&uart_rx_gpio113 &uart_tx_gpio114>;
+	pinctrl-names = "default";
+};
+
+&swj_port {
+	status = "okay";
+};

boards/realtek/rts5912_evb/rts5912_evb.yaml

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+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2024 Realtek Semiconductor Corporation, SIBG-SD7
+#
+
+identifier: rts5912_evb
+name: RTS5912-EVB
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+ram: 64
+flash: 320
+supported:
+  - gpio
+  - pinmux
+vendor: realtek

boards/realtek/rts5912_evb/rts5912_evb_defconfig

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+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2024 Realtek Semiconductor Corporation, SIBG-SD7
+#
+
+# Enable RTS5912 image tool
+CONFIG_REALTEK_RTS5912_BOOTROM_HEADER=y
+
+# Serial Driver
+CONFIG_SERIAL=y
+CONFIG_UART_NS16550=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+
+# Console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+# Enable GPIO
+CONFIG_GPIO=y