boards: renesas: Add support for Renesas EK-RA4M1

boards/renesas/ek_ra4m1/Kconfig.ek_ra4m1

@@ -0,0 +1,5 @@
+# Copyright (c) 2024 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_EK_RA4M1
+	select SOC_R7FA4M1AB3CFP

boards/renesas/ek_ra4m1/board.cmake

@@ -0,0 +1,6 @@
+# Copyright (c) 2024 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(jlink "--device=R7FA4M1AB")
+
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)

boards/renesas/ek_ra4m1/board.yml

@@ -0,0 +1,6 @@
+board:
+  name: ek_ra4m1
+  full_name: RA4M1 Evaluation Kit
+  vendor: renesas
+  socs:
+  - name: r7fa4m1ab3cfp

boards/renesas/ek_ra4m1/doc/index.rst

@@ -0,0 +1,164 @@
+.. _ek_ra4m1:
+
+RA4M1 Evaluation Kit
+####################
+
+Overview
+********
+
+The MCU integrates multiple series of software- and pin-compatible Arm®-based 32-bit
+cores that share a common set of Renesas peripherals to facilitate design scalability
+and efficient platform-based product development.
+The MCU provides an optimal combination of low-power, high-performance Arm Cortex®-M4 core
+running up to 48 MHz with the following features:
+
+**Renesas RA4M1 Microcontroller Group**
+- R7FA4M1AB3CFP
+- 100-pin LQFP package
+- 48 MHz Arm® Cortex®-M4 core with Floating Point Unit (FPU)
+- 32 KB SRAM
+- 256 KB code flash memory
+- 8 KB data flash memory
+
+**Connectivity**
+- A Device USB connector for the Main MCU
+- SEGGER J-Link® On-Board (OB) interface for debugging and programming of the RA4M1 MCU. A
+10pin JTAG/SWD interface is also provided for connecting optional external debuggers and
+programmers.
+- Two PMOD connectors, allowing use of appropriate PMOD compliant peripheral plug-in modules for
+rapid prototyping
+- Pin headers for access to power and signals for the Main MCU
+
+**Multiple clock sources**
+- Main MCU oscillator crystals, providing precision 12.000 MHz and 32,768 Hz external reference
+clocks
+- Additional low-precision clocks are available internal to the Main MCU
+
+**General purpose I/O ports**
+- One jumper to allow measuring of Main MCU current
+- Copper jumpers on PCB bottom side for configuration and access to selected MCU signals
+
+**Operating voltage**
+- External 5 V input through the Debug USB connector supplies the on-board power regulator to power
+logic and interfaces on the board. External 5 V or 3.3 V may be also supplied through alternate
+locations on the board.
+
+- A two-color board status LED indicating availability of regulated power and connection status of the J-Link
+interface.
+
+- A red User LED, controlled by the Main MCU firmware
+- A User Push-Button switch, User Capacitive Touch Button sensor, and an optional User Potentiometer,
+all of which are controlled by the Main MCU firmware
+- MCU reset push-button switch
+- MCU boot configuration jumper
+
+**Special Feature Access**
+
+- USB Full Speed Debug and Device (micro-AB connector)
+
+.. figure:: ek_ra4m1.webp
+	:align: center
+	:alt: RA4M1 Evaluation Kit
+
+	EK-RA4M1 Board Functional Area Definitions (Credit: Renesas Electronics Corporation)
+
+Hardware
+********
+Detailed hardware feature for the RA4M1 MCU group can be found at `RA4M1 Group User's Manual Hardware`_
+
+.. figure:: ra4m1_block_diagram.webp
+	:width: 442px
+	:align: center
+	:alt: RA4M1 MCU group feature
+
+	RA4M1 Block diagram (Credit: Renesas Electronics Corporation)
+
+Detailed hardware feature for the EK-RA4M1 MCU can be found at `EK-RA4M1 - User's Manual`_
+
+Supported Features
+==================
+
+The below features are currently supported on Zephyr OS for EK-RA4M1 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        |
++-----------+------------+----------------------+
+| COUNTER   | on-chip    | counter              |
++-----------+------------+----------------------+
+| SPI       | on-chip    | spi                  |
++-----------+------------+----------------------+
+
+Other hardware features are currently not supported by the port.
+
+Programming and Debugging
+*************************
+
+Applications for the ``ek_ra4m1`` 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-RA4M1 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-RA4M1 - 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: R7FA4M1AB
+* 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-RA4M1 Website`_
+- `RA4M1 MCU group Website`_
+
+.. _EK-RA4M1 Website:
+   https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ek-ra4m1-evaluation-kit-ra4m1-mcu-group
+
+.. _RA4M1 MCU group Website:
+   https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ra4m1-32-bit-microcontrollers-48mhz-arm-cortex-m4-and-lcd-controller-and-cap-touch-hmi
+
+.. _EK-RA4M1 - User's Manual:
+   https://www.renesas.com/us/en/document/mat/ek-ra4m1-v1-users-manual
+
+.. _RA4M1 Group User's Manual Hardware:
+   https://www.renesas.com/us/en/document/mah/renesas-ra4m1-group-users-manual-hardware?r=1054146
+
+.. _Segger Ozone Download:
+   https://www.segger.com/downloads/jlink#Ozone

boards/renesas/ek_ra4m1/ek_ra4m1-pinctrl.dtsi

@@ -0,0 +1,24 @@
+/*
+ * 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, 4, 1)>,
+			<RA_PSEL(RA_PSEL_SCI_1, 4, 2)>;
+		};
+	};
+
+	spi1_default: spi1_default {
+		group1 {
+			/* MISO MOSI RSPCK SSL */
+			psels = <RA_PSEL(RA_PSEL_SPI, 2, 2)>,
+			<RA_PSEL(RA_PSEL_SPI, 2, 3)>,
+			<RA_PSEL(RA_PSEL_SPI, 2, 4)>,
+			<RA_PSEL(RA_PSEL_SPI, 2, 5)>;
+		};
+	};
+};

boards/renesas/ek_ra4m1/ek_ra4m1.dts

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2024 Renesas Electronics Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include <renesas/ra/ra4/r7fa4m1ab3cfp.dtsi>
+#include <dt-bindings/gpio/gpio.h>
+#include "ek_ra4m1-pinctrl.dtsi"
+
+/ {
+	model = "Renesas EK-RA4M1";
+	compatible = "renesas,ra4m1", "renesas,ra";
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,console = &uart1;
+		zephyr,shell-uart = &uart1;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led1: led1 {
+			gpios = <&ioport1 6 GPIO_ACTIVE_HIGH>;
+			label = "LED1";
+		};
+	};
+
+	aliases {
+		led0 = &led1;
+	};
+};
+
+&xtal {
+	clock-frequency = <DT_FREQ_M(12)>;
+	mosel = <0>;
+	#clock-cells = <0>;
+	status = "okay";
+};
+
+&subclk {
+	status = "okay";
+};
+
+&pll {
+	clocks = <&xtal>;
+	div = <2>;
+	mul = <8 0>;
+	status = "okay";
+};
+
+&sci1 {
+	pinctrl-0 = <&sci1_default>;
+	pinctrl-names = "default";
+	status = "okay";
+	uart1: uart {
+		current-speed = <115200>;
+		status = "okay";
+	};
+};
+
+&ioport1 {
+	status = "okay";
+};
+
+&ioport2 {
+	status = "okay";
+};
+
+&ioport4 {
+	status = "okay";
+};
+
+&spi1 {
+	pinctrl-0 = <&spi1_default>;
+	pinctrl-names = "default";
+	status = "okay";
+};

boards/renesas/ek_ra4m1/ek_ra4m1.yaml

@@ -0,0 +1,12 @@
+identifier: ek_ra4m1
+name: Renesas EK-RA4M1
+type: mcu
+arch: arm
+ram: 32
+flash: 256
+toolchain:
+  - zephyr
+  - gnuarmemb
+supported:
+  - gpio
+  - uart

boards/renesas/ek_ra4m1/ek_ra4m1_defconfig

@@ -0,0 +1,17 @@
+# Copyright (c) 2024 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=48000000
+
+# Enable GPIO
+CONFIG_GPIO=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
+CONFIG_CLOCK_CONTROL=y

drivers/spi/Kconfig.renesas_ra

@@ -28,7 +28,7 @@ config SPI_RA_DTC
 config SPI_USE_HW_SS
 	bool "RA MCU SPI Hardware Slave Select support"
 	default y
-	depends on !SOC_SERIES_RA2A1
+	depends on !(SOC_SERIES_RA2A1 || SOC_SERIES_RA4M1)
 	help
 	  Use Slave Select pin instead of software Slave Select.