boards: arm: add initial support for Arduino UNO R4 Minima

Add support for the Arduino UNO R4 Minima.
This board is the newest version of Arduino that uses Renesas RA4M1 SoC.

This commit provides only limited support to simplify the initial support patch.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>

boards/arm/arduino_uno_r4/Kconfig.board

@@ -0,0 +1,6 @@
+# Copyright (c) 2023 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_ARDUINO_UNO_R4_MINIMA
+	bool "Arduino Uno R4 Minima board"
+	depends on SOC_R7FA4M1AB3CFM

boards/arm/arduino_uno_r4/Kconfig.defconfig

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+# Copyright (c) 2023 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_ARDUINO_UNO_R4_MINIMA
+
+config BOARD
+	default "arduino_uno_r4_minima" if BOARD_ARDUINO_UNO_R4_MINIMA
+
+endif # BOARD_ARDUINO_UNO_R4_MINIMA

boards/arm/arduino_uno_r4/arduino_uno_r4_common.dtsi

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+/*
+ * Copyright (c) 2023 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <renesas/ra/r7fa4m1ab3cfm.dtsi>
+
+/ {
+	model = "Arduino Uno R4 Board";
+	compatible = "renesas,r7fa4m1aB3cfm";
+};

boards/arm/arduino_uno_r4/arduino_uno_r4_minima-pinctrl.dtsi

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+/*
+ * Copyright (c) 2023 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&pinctrl {
+	uart2_default: uart2_default {
+		group1 {
+			/* TODO define macros port3:pin0 sci0-txd*/
+			pinmux = <0x04630000>;
+		};
+		group2 {
+			/* TODO define macros port3:pin1 sci0-rxd*/
+			pinmux = <0x04650000>;
+		};
+	};
+};

boards/arm/arduino_uno_r4/arduino_uno_r4_minima.dts

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+/*
+ * Copyright (c) 2023 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
+#include "arduino_uno_r4_common.dtsi"
+#include "arduino_uno_r4_minima-pinctrl.dtsi"
+
+/ {
+	model = "Arduino Uno R4 Minima";
+
+	chosen {
+		zephyr,console = &uart2;
+		zephyr,shell-uart = &uart2;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,code-partition = &code_partition;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led: led {
+			gpios = <&ioport1 11 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	aliases {
+		led0 = &led;
+	};
+};
+
+&uart2 {
+	status = "okay";
+	pinctrl-0 = <&uart2_default>;
+	pinctrl-names = "default";
+};
+
+&ioport1 {
+	status = "okay";
+};
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		boot_partition: partition@0 {
+			label = "bootloader";
+			reg = <0x00000000 0x4000>;
+			read-only;
+		};
+
+		code_partition: partition@4000 {
+			label = "code";
+			reg = <0x4000 0x3C000>;
+			read-only;
+		};
+	};
+};
+
+&fcu {
+	status = "okay";
+};
+
+&sosc {
+	status = "okay";
+};
+
+&hoco {
+	status = "okay";
+	clock-frequency = <48000000>;
+};
+
+&moco {
+	status = "okay";
+};
+
+&loco {
+	status = "okay";
+};
+
+&subclk {
+	status = "okay";
+};
+
+&sysclk {
+	status = "okay";
+	clocks = <&hoco>;
+};
+
+&iclk {
+	status = "okay";
+	clock-div = <1>;
+};
+
+&pclka {
+	status = "okay";
+	clock-div = <1>;
+};
+
+&pclkb {
+	status = "okay";
+	clock-div = <2>;
+};
+
+&pclkc {
+	status = "okay";
+	clock-div = <1>;
+};
+
+&pclkd {
+	status = "okay";
+	clock-div = <1>;
+};
+
+&fclk {
+	status = "okay";
+	clock-div = <2>;
+};

boards/arm/arduino_uno_r4/arduino_uno_r4_minima.yaml

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+identifier: arduino_uno_r4_minima
+name: Arduino Uno R4 Minima
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+ram: 32
+supported:
+  - gpio
+  - uart

boards/arm/arduino_uno_r4/arduino_uno_r4_minima_defconfig

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+# Copyright (c) 2023 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_SOC_SERIES_RA4M1=y
+CONFIG_SOC_R7FA4M1AB3CFM=y
+
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=48000000
+
+CONFIG_BUILD_OUTPUT_HEX=y
+
+# enable uart driver
+CONFIG_SERIAL=y
+
+# enable console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+# enable GPIO
+CONFIG_GPIO=y
+
+CONFIG_PINCTRL=y
+
+CONFIG_CLOCK_CONTROL=y
+
+CONFIG_USE_DT_CODE_PARTITION=y

boards/arm/arduino_uno_r4/board.cmake

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+# Copyright (c) 2023 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(e2-server-gdb
+	"--target=R7FA4M1AB"
+	"--adapter=E2LITE"
+	"-uConnectionTimeout=30"
+	"-uClockSrc=0"
+	"-uAllowClockSourceInternal=1"
+	"-uInteface=SWD"
+	"-uIfSpeed=auto"
+	"-uIdCodeBytes=FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
+	"-uResetCon=1"
+	"-uLowPower=1"
+	"-uresetOnReload=1"
+	"-uFlashBp=0"
+	"-uhookWorkRamSize=0x400"
+	"-ueraseRomOnDownload=0"
+	"-ueraseDataRomOnDownload=0"
+	"-uTraceMTB=0"
+	"-uTraceSizeMTB=1024"
+	"-uProgReWriteIRom=0"
+	"-uProgReWriteDFlash=0"
+	"-uOSRestriction=0"
+	"-uTimeMeasurementEnable=1"
+	"-uDWTEnable=0"
+	"-uMemRegion=0x00000000:0x40000:FLASH:e"
+	"-uMemRegion=0x40100000:0x2000:DATA_FLASH:e"
+	"-uCore=SINGLE_CORE\|enabled\|1\|main"
+	"-uSyncMode=async"
+	"-uFirstGDB=main"
+	"-w 0"
+	"-z 33"
+	"-n 0"
+	"-l"
+	)
+
+#board_runner_args(dfu-util "--pid=\"2341:0069,:0369\"" "--alt=0" "--dfuse")
+
+#include(${ZEPHYR_BASE}/boards/common/dfu-util.board.cmake)
+
+board_runner_args(rfp-cli "--device=RA" "--tool=e2l" "--interface=swd" "--range=0x4000,0x40000" "--verify" "--reset")
+
+include(${ZEPHYR_BASE}/boards/common/rfp-cli.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/e2-server-gdb.board.cmake)

boards/arm/arduino_uno_r4/doc/index.rst

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+.. _arduino_uno_r4:
+
+Arduino UNO R4 Minima
+#######################
+
+Overview
+********
+
+Arduino UNO R4 Minima is a development board with a Renesas RA4M1 SoC.
+
+Programming and debugging
+*************************
+
+Building & Flashing
+===================
+
+Here is an example for building the :ref:`blinky-sample` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/basic/blinky
+   :board: arduino_uno_r4_minima
+   :goals: build
+
+The default runner tries to flash the board via an external programmer using openocd.
+To flash via the USB port, select the DFU runner when flashing:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/basic/blinky
+   :board: arduino_uno_r4_minima
+   :goals: flash
+
+Debugging
+=========
+
+You can debug an application in the usual way.  Here is an example for the
+:ref:`blinky-sample` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/basic/blinky
+   :board: longan_nano
+   :maybe-skip-config:
+   :goals: debug