boards: renesas: Support Renesas EK-RA8D1 board

Initial support for EK-RA8D1 board this commit
only support basic GPIO and Serial driver for
RA8D1 board

Signed-off-by: Duy Phuong Hoang. Nguyen <duy.nguyen.xa@renesas.com>

boards/renesas/ek_ra8d1/Kconfig.ek_ra8d1

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+# Copyright (c) 2024 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_EK_RA8D1
+	select SOC_R7FA8D1BHECBD

boards/renesas/ek_ra8d1/board.cmake

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+# Copyright (c) 2024 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(jlink "--device=R7FA8D1BH")
+
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)

boards/renesas/ek_ra8d1/board.yml

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+board:
+  name: ek_ra8d1
+  vendor: renesas
+  socs:
+  - name: r7fa8d1bhecbd

boards/renesas/ek_ra8d1/doc/index.rst

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+.. _ek_ra8d1:
+
+RA8D1 Evaluation Kit
+####################
+
+Overview
+********
+
+The EK-RA8D1 is an Evaluation Kit for Renesas RA8D1 MCU Group which are the industry’s first 32-bit
+graphics-enabled MCUs based on the Arm Cortex-M85 (CM85) core, delivering breakthrough performance
+of over 3000 Coremark points at 480 MHz and superior graphics capabilities that enable high-resolution
+displays and Vision AI applications.
+
+The key features of the EK-RA8D1 board are categorized in three groups as follow:
+
+**MCU Native Pin Access**
+
+- 480MHz Arm Cortex-M85 based RA8D1 MCU in 224 pins, BGA package
+- Native pin acces througgh 2 x 50-pin, and 2 x 40-pin male headers
+- MCU current measurement points for precision current consumption measurement
+- Multiple clock sources - RA8D1 MCU oscillator and sub-clock oscillator crystals,
+  providing precision 20.000MHz and 32,768 Hz refeence clocks.
+  Additional low precision clocks are avaialbe internal to the RA8D1 MCU
+
+**System Control and Ecosystem Access**
+
+- USB Full Speed Host and Device (micro-AB connector)
+- Four 5V input sources
+
+  - USB (Debug, Full Speed, High Speed)
+  - External power supply (using surface mount clamp test points and power input vias)
+
+- Three Debug modes
+
+  - Debug on-board (SWD)
+  - Debug in (ETM, SWD and JTAG)
+  - Debug out (SWD)
+
+- User LEDs and buttons
+
+  - Three User LEDs (red, blue, green)
+  - Power LED (white) indicating availability of regulated power
+  - Debug LED (yellow) indicating the debug connection
+  - Two User buttons
+  - One Reset button
+
+- Five most popular ecosystems expansions
+
+  - Two Seeed Grove system (I2C/I3C) connectors
+  - One SparkFun Qwiic connector
+  - Two Digilent Pmod (SPI, UART and I2C/I3C) connectors
+  - Arduino (Uno R3) connector
+  - MikroElektronika mikroBUS connector
+
+- MCU boot configuration jumper
+
+**Special Feature Access**
+
+- Ethernet (RJ45 RMII interface)
+- USB High Speed Host and Device (micro-AB connector)
+- 512 Mb (64 MB) External Octo-SPI Flash (present in the MCU Native Pin Access area of the EK-RA8D1 board)
+- CAN FD (3-pin header)
+
+.. figure:: ek-ra8d1-board.jpg
+	:align: center
+	:alt: RA8D1 Evaluation Kit
+
+	EK-RA8D1 Board Functional Area Definitions (Credit: Renesas Electronics Corporation)
+
+Hardware
+********
+Detail Hardware feature for the RA8D1 MCU group can be found at `RA8D1 Group User's Manual Hardware`_
+
+.. figure:: ra8d1-block-diagram.png
+	:width: 442px
+	:align: center
+	:alt: RA8D1 MCU group feature
+
+	RA8D1 Block diagram (Credit: Renesas Electronics Corporation)
+
+Detail Hardware feature for the EK-RA8D1 MCU can be found at `EK-RA8D1 - User's Manual`_
+
+Supported Features
+==================
+
+The below features are currently supported on Zephyr OS for EK-RA8D1 board:
+
++--------------+------------+------------------+
+| Interface    | Controller | Driver/Component |
++==============+============+==================+
+| GPIO         | on-chip    | gpio             |
++--------------+------------+------------------+
+| MPU          | on-chip    | arch/arm         |
++--------------+------------+------------------+
+| NVIC         | on-chip    | arch/arm         |
++--------------+------------+------------------+
+| UART         | on-chip    | serial           |
++--------------+------------+------------------+
+| CLOCK        | on-chip    | clock control    |
++--------------+------------+------------------+
+
+Other hardware features are currently not supported by the port.
+
+Programming and Debugging
+*************************
+
+Applications for the ``ek_ra8d1`` board configuration can be
+built, flashed, and debugged in the usual way. See
+:ref:`build_an_application` and :ref:`application_run` for more details on
+building and running.
+
+**Note:** Only support from SDK v0.16.6 in which GCC for Cortex Arm-M85 was available.
+To build for EK-RA8M1 user need to get and install GNU Arm Embedded toolchain from https://github.com/zephyrproject-rtos/sdk-ng/releases/tag/v0.16.6
+
+Flashing
+========
+
+Program can be flashed to EK-RA8D1 via the on-board SEGGER J-Link debugger.
+SEGGER J-link's drivers are avaialbe at https://www.segger.com/downloads/jlink/
+
+To flash the program to board
+
+  1. Connect to J-Link OB via USB port to host PC
+
+  2. Make sure J-Link OB jumper is in default configuration as describe in `EK-RA8D1 - User's Manual`_
+
+  3. Execute west command
+
+	.. code-block:: console
+
+		west flash -r jlink
+
+Debugging
+=========
+
+You can use Segger Ozone (`Segger Ozone Download`_) for a visual debug interface
+
+Once downloaded and installed, open Segger Ozone and configure the debug project
+like so:
+
+* Target Device: R7FA8D1BH
+* Target Interface: SWD
+* Target Interface Speed: 4 MHz
+* Host Interface: USB
+* Program File: <path/to/your/build/zephyr.elf>
+
+**Note:** It's verified that debug is OK on Segger Ozone v3.30d so please use this or later
+version of Segger Ozone
+
+References
+**********
+- `EK-RA8D1 Website`_
+- `RA8D1 MCU group Website`_
+
+.. _EK-RA8D1 Website:
+   https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ek-ra8d1-evaluation-kit-ra8d1-mcu-group
+
+.. _RA8D1 MCU group Website:
+   https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ra8d1-480-mhz-arm-cortex-m85-based-graphics-microcontroller-helium-and-trustzone
+
+.. _EK-RA8D1 - User's Manual:
+   https://www.renesas.com/us/en/document/mat/ek-ra8d1-v1-user-manual
+
+.. _RA8D1 Group User's Manual Hardware:
+   https://www.renesas.com/us/en/document/mah/ra8d1-group-users-manual-hardware
+
+.. _Segger Ozone Download:
+   https://www.segger.com/downloads/jlink#Ozone

boards/renesas/ek_ra8d1/ek_ra8d1-pinctrl.dtsi

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+/*
+ * Copyright (c) 2024 Renesas Electronics Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&pinctrl {
+	sci9_default: sci9_default {
+		group1 {
+			/* tx */
+			psels = <RA_PSEL(RA_PSEL_SCI_9, 10, 14)>;
+			drive-strength = "medium";
+		};
+		group2 {
+			/* rx */
+			psels = <RA_PSEL(RA_PSEL_SCI_9, 10, 15)>;
+		};
+	};
+};

boards/renesas/ek_ra8d1/ek_ra8d1.dts

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+/*
+ * Copyright (c) 2024 Renesas Electronics Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include <renesas/ra/ra8/r7fa8d1bhecbd.dtsi>
+#include <dt-bindings/gpio/gpio.h>
+
+#include "ek_ra8d1-pinctrl.dtsi"
+
+/ {
+	model = "Renesas EK-RA8D1";
+	compatible = "renesas,ra8d1", "renesas,ra8";
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,console = &uart9;
+		zephyr,shell-uart = &uart9;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led1: led1 {
+			gpios = <&ioport6 0 GPIO_ACTIVE_HIGH>;
+			label = "LED1";
+		};
+		led2: led2 {
+			gpios = <&ioport4 14 GPIO_ACTIVE_HIGH>;
+			label = "LED2";
+		};
+		led3: led3 {
+			gpios = <&ioport1 7 GPIO_ACTIVE_HIGH>;
+			label = "LED3";
+		};
+	};
+
+	aliases {
+		led0 = &led1;
+	};
+};
+
+&xtal {
+	clock-frequency = <DT_FREQ_M(20)>;
+	mosel = <0>;
+	#clock-cells = <0>;
+	status = "okay";
+};
+
+&subclk {
+	status = "okay";
+};
+
+&pll {
+	source = <RA_PLL_SOURCE_MAIN_OSC>;
+	div = <RA_PLL_DIV_2>;
+	mul = <96 0>;
+	divp = <RA_PLL_DIV_2>;
+	freqp = <DT_FREQ_M(480)>;
+	divq = <RA_PLL_DIV_2>;
+	freqq = <DT_FREQ_M(480)>;
+	divr = <RA_PLL_DIV_2>;
+	freqr = <DT_FREQ_M(480)>;
+	status = "okay";
+};
+
+&sciclk {
+	clk_src = <RA_CLOCK_SOURCE_PLL1P>;
+	clk_div = <RA_SCI_CLOCK_DIV_4>;
+	status = "okay";
+};
+
+&ioport1 {
+	status = "okay";
+};
+
+&ioport4 {
+	status = "okay";
+};
+
+&ioport6 {
+	status = "okay";
+};
+
+&sci0 {
+	/* sci0 and spi0 cannot be enabled together */
+	pinctrl-0 = <&sci9_default>;
+	pinctrl-names = "default";
+};
+
+&sci9 {
+	pinctrl-0 = <&sci9_default>;
+	pinctrl-names = "default";
+	status = "okay";
+	uart9: uart {
+		current-speed = <115200>;
+		status = "okay";
+	};
+};

boards/renesas/ek_ra8d1/ek_ra8d1.yaml

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+identifier: ek_ra8d1
+name: Renesas EK-RA8D1
+type: mcu
+arch: arm
+ram: 1024
+flash: 2048
+toolchain:
+  - zephyr
+  - gnuarmemb
+supported:
+  - gpio
+  - uart

boards/renesas/ek_ra8d1/ek_ra8d1_defconfig

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+# Copyright (c) 2024 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=480000000
+
+# Enable GPIO
+CONFIG_GPIO=y
+CONFIG_PINCTRL=y
+
+# Enable Console
+CONFIG_SERIAL=y
+CONFIG_UART_CONSOLE=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+CONFIG_CONSOLE=y
+CONFIG_CLOCK_CONTROL=y
+
+CONFIG_BUILD_OUTPUT_HEX=y
+CONFIG_BUILD_NO_GAP_FILL=y