boards: renesas: Add initial support for EK-RA4W1 board

Initial commit to support Renesas EK-RA4W1 board

Signed-off-by: Quy Tran <quy.tran.pz@renesas.com>
Signed-off-by: Duy Phuong Hoang. Nguyen <duy.nguyen.xa@renesas.com>

boards/renesas/ek_ra4w1/Kconfig.ek_ra4w1

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+# Copyright (c) 2024 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_EK_RA4W1
+	select SOC_R7FA4W1AD2CNG

boards/renesas/ek_ra4w1/board.cmake

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+# Copyright (c) 2024 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(jlink "--device=R7FA4W1AD")
+
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)

boards/renesas/ek_ra4w1/board.yml

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+board:
+  name: ek_ra4w1
+  vendor: renesas
+  socs:
+  - name: r7fa4w1ad2cng

boards/renesas/ek_ra4w1/doc/index.rst

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+.. _ek_ra4w1:
+
+RA4W1 Evaluation Kit
+####################
+
+Overview
+********
+
+The Renesas RA4W1 is the first Bluetooth® 5.0 Low Energy fully compliant with 2Mbit High-Throughput
+(HT) and Long Range support in a single chip MCU of Renesas RA4  product series for IoT applications
+that require a high-performance Arm® Cortex®-M4 core at a very attractive price point. The RA4W1 MCU
+has full function support for Bluetooth 5.0 Low Energy long-range and mesh networking, and provides
+excellent reception performance. RA4W1 is geared towards IoT application requiring Security, large
+embedded RAM and low power consumption.
+
+**MCU Native Pin Access**
+- R7FA4W1AD2CNG
+- QFN-56 package
+- On-chip memory: 512-KB ROM, 96-KB RAM, 8-KB data flash memory
+
+**Power-supply voltage**
+- USB connector: 5-V input
+- Power-supply IC: 5-V input, 3.3-V output
+- External power-supply header*1: 3.3-V input, 2 pins x 1
+
+**Main clock**
+- Crystal oscillator (surface-mount technology (SMT)) for the main system clock
+- Crystal oscillator or ceramic resonator (lead type) for the main system clock
+
+**Sub-clock**
+- Crystal oscillator (SMT) for the sub-clock
+
+**Bluetooth Low Energy**
+- Bluetooth Low Energy (BLE) circuit x1
+- Range of frequency: 2402 to 2480 MHz
+- Maximum transmission output power: 4 dBm (in 4-dBm output mode)
+- Output variation: +2 dB
+
+**Push switches**
+- Reset switch x 1
+- User switch x 1
+
+**LED**
+- Power indicator: green x 1
+- User: green x 2
+- ACT LED: green x 1
+
+**Conetivity**
+- Connector for an on-board emulator: USB Micro-B
+- Connector for a USB serial-conversion interface: USB Micro-B
+- Pmod™ connector: Angle type, 12 pins
+- Arduino™ UNO connectors
+
+- Emulator reset switch
+
+.. figure:: ek-ra4w1-board.webp
+	:align: center
+	:alt: RA4W1 Evaluation Kit
+
+	EK-RA4W1 Board Functional Area Definitions (Credit: Renesas Electronics Corporation)
+
+Hardware
+********
+Detail Hardware feature for the RA4W1 MCU group can be found at `RA4W1 Group User's Manual Hardware`_
+
+.. figure:: ra4w1-block-diagram.webp
+	:width: 442px
+	:align: center
+	:alt: RA4W1 MCU group feature
+
+	RA4W1 Block diagram (Credit: Renesas Electronics Corporation)
+
+Detail Hardware feature for the EK-RA4W1 MCU can be found at `EK-RA4W1 - User's Manual`_
+
+Supported Features
+==================
+
+The below features are currently supported on Zephyr OS for EK-RA4W1 board:
+
++-----------+------------+----------------------+
+| Interface | Controller | Driver/Component     |
++===========+============+======================+
+| GPIO      | on-chip    | gpio                 |
++-----------+------------+----------------------+
+| MPU       | on-chip    | arch/arm             |
++-----------+------------+----------------------+
+| NVIC      | on-chip    | arch/arm             |
++-----------+------------+----------------------+
+| UART      | on-chip    | serial               |
++-----------+------------+----------------------+
+
+Other hardware features are currently not supported by the port.
+
+Programming and Debugging
+*************************
+
+Applications for the ``ek_ra4w1`` board target 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.
+
+Flashing
+========
+
+Program can be flashed to EK-RA4W1 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-RA4W1 - 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: R7FA4W1AD
+* Target Interface: SWD
+* Target Interface Speed: 4 MHz
+* Host Interface: USB
+* Program File: <path/to/your/build/zephyr.elf>
+
+**Note:** It's verified that we can debug OK on Segger Ozone v3.30d so please use this or later
+version of Segger Ozone
+
+References
+**********
+- `EK-RA4W1 Website`_
+- `RA4W1 MCU group Website`_
+
+.. _EK-RA4W1 Website:
+   https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ek-ra4w1-evaluation-kit-ra4w1-mcu-group
+
+.. _RA4W1 MCU group Website:
+   https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ra4w1-low-energy-single-chip-32-bit-microcontrollers-48mhz-bluetooth-50
+
+.. _EK-RA4W1 - User's Manual:
+   https://www.renesas.com/us/en/document/man/ek-ra4w1-users-manual
+
+.. _RA4W1 Group User's Manual Hardware:
+   https://www.renesas.com/us/en/document/man/renesas-ra4w1-group-users-manual-hardware
+
+.. _Segger Ozone Download:
+   https://www.segger.com/downloads/jlink#Ozone

boards/renesas/ek_ra4w1/ek_ra4w1-pinctrl.dtsi

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+/*
+ * Copyright (c) 2024 Renesas Electronics Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&pinctrl {
+	sci0_default: sci0_default {
+		group1 {
+			/* tx rx */
+			psels = <RA_PSEL(RA_PSEL_SCI_0, 1, 1)>,
+			<RA_PSEL(RA_PSEL_SCI_0, 1, 0)>;
+		};
+	};
+};

boards/renesas/ek_ra4w1/ek_ra4w1.dts

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+/*
+ * Copyright (c) 2024 Renesas Electronics Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include <renesas/ra/ra4/r7fa4w1ad2cng.dtsi>
+#include <dt-bindings/gpio/gpio.h>
+#include "ek_ra4w1-pinctrl.dtsi"
+
+/ {
+	model = "Renesas EK-RA4W1";
+	compatible = "renesas,ra4w1", "renesas,ra";
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,console = &uart0;
+		zephyr,shell-uart = &uart0;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led1: led1 {
+			gpios = <&ioport1 6 GPIO_ACTIVE_HIGH>;
+			label = "LED1";
+		};
+
+		led2: led2 {
+			gpios = <&ioport4 4 GPIO_ACTIVE_HIGH>;
+			label = "LED2";
+		};
+	};
+
+	aliases {
+		led0 = &led1;
+	};
+};
+
+&subclk {
+	status = "okay";
+};
+
+&sci0 {
+	pinctrl-0 = <&sci0_default>;
+	pinctrl-names = "default";
+	status = "okay";
+	uart0: uart {
+		current-speed = <115200>;
+		status = "okay";
+	};
+};
+
+&ioport1 {
+	status = "okay";
+};
+
+&ioport4 {
+	status = "okay";
+};

boards/renesas/ek_ra4w1/ek_ra4w1.yaml

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+identifier: ek_ra4w1
+name: Renesas EK-RA4W1
+type: mcu
+arch: arm
+ram: 96
+flash: 512
+toolchain:
+  - zephyr
+  - gnuarmemb
+supported:
+  - gpio
+  - uart

boards/renesas/ek_ra4w1/ek_ra4w1_defconfig

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+# Copyright (c) 2024 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=32000000
+
+# Enable GPIO
+CONFIG_GPIO=y
+CONFIG_PINCTRL=y
+
+# Enable Console
+CONFIG_SERIAL=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+CONFIG_UART_CONSOLE=y
+CONFIG_CONSOLE=y
+
+CONFIG_BUILD_OUTPUT_HEX=y
+CONFIG_BUILD_NO_GAP_FILL=y

tests/drivers/uart/uart_async_api/boards/ek_ra4w1.overlay

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+/*
+ * Copyright (c) 2024 Renesas Electronics Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&pinctrl {
+	sci1_default: sci1_default {
+		group1 {
+			/* tx rx */
+			psels = <RA_PSEL(RA_PSEL_SCI_1, 2, 13)>,
+			<RA_PSEL(RA_PSEL_SCI_1, 2, 12)>;
+		};
+	};
+};
+
+&sci1 {
+	pinctrl-0 = <&sci1_default>;
+	pinctrl-names = "default";
+	status = "okay";
+	dut: uart {
+		current-speed = <115200>;
+		status = "okay";
+	};
+};