Add support for Arduino UNO R4

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

@@ -0,0 +1,9 @@
+# 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

@@ -0,0 +1,13 @@
+/*
+ * 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

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2023 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/pinctrl/renesas/pinctrl-r7fa4m1xxxxxx.h>
+
+&pinctrl {
+	sci2_default: sci2_default {
+		group1 {
+			pinmux = <P301_RXD2>, <P302_TXD2>;
+		};
+	};
+};

boards/arm/arduino_uno_r4/arduino_uno_r4_minima.dts

@@ -0,0 +1,88 @@
+/*
+ * 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;
+	};
+};
+
+&sci2 {
+	status = "okay";
+	pinctrl-0 = <&sci2_default>;
+	pinctrl-names = "default";
+	uart2: uart {
+		current-speed = <115200>;
+		status = "okay";
+	};
+};
+
+&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";
+};
+
+&hoco {
+	status = "okay";
+	clock-frequency = <48000000>;
+};
+
+&cgc {
+	clock-source = <&hoco>;
+	iclk-div = <1>;
+	pclka-div = <1>;
+	pclkb-div = <2>;
+	pclkc-div = <1>;
+	pclkd-div = <1>;
+	fclk-div = <2>;
+};

boards/arm/arduino_uno_r4/arduino_uno_r4_minima.yaml

@@ -0,0 +1,12 @@
+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

@@ -0,0 +1,25 @@
+# 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

@@ -0,0 +1,6 @@
+# Copyright (c) 2023 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(pyocd "--target=r7fa4m1ab")
+
+include(${ZEPHYR_BASE}/boards/common/pyocd.board.cmake)

boards/arm/arduino_uno_r4/doc/index.rst

@@ -0,0 +1,64 @@
+.. _arduino_uno_r4:
+
+Arduino UNO R4 Minima
+#####################
+
+Overview
+********
+
+The Arduino UNO R4 Minima is a development board featuring the Renesas RA4M1 SoC
+in the Arduino form factor and is compatible with traditional Arduino.
+
+Programming and debugging
+*************************
+
+Building & Flashing
+===================
+
+You can build and flash an application in the usual way (See
+:ref:`build_an_application` and
+:ref:`application_run` for more details).
+
+Here is an example for building and flashing the :zephyr:code-sample:`blinky` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/basic/blinky
+   :board: arduino_uno_r4_minima
+   :goals: build flash
+
+Debugging
+=========
+
+Debugging also can be done in the usual way.
+The following command is debugging the :zephyr:code-sample:`blinky` application.
+Also, see the instructions specific to the debug server that you use.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/basic/blinky
+   :board: arduino_uno_r4_minima
+   :maybe-skip-config:
+   :goals: debug
+
+
+Using pyOCD
+-----------
+
+Various debug adapters, including cmsis-dap probes, can debug the Arduino UNO R4 with pyOCD.
+The default configuration uses the pyOCD for debugging.
+You must install CMSIS-Pack when flashing or debugging Arduino UNO R4 Minima with pyOCD.
+If not installed yet, execute the following command to install CMSIS-Pack for Arduino UNO R4.
+
+.. code-block:: console
+
+   pyocd pack install r7fa4m1ab
+
+
+Restoring Arduino Bootloader
+============================
+
+If you corrupt the Arduino bootloader, you can restore it with the following command.
+
+.. code-block:: console
+
+   wget https://raw.githubusercontent.com/arduino/ArduinoCore-renesas/main/bootloaders/UNO_R4/dfu_minima.hex
+   pyocd flash -e sector -a 0x0 -t r7fa4m1ab dfu_minima.hex

drivers/clock_control/CMakeLists.txt

@@ -26,6 +26,7 @@ zephyr_library_sources_ifdef(CONFIG_CLOCK_CONTROL_SAM                 clock_cont
 zephyr_library_sources_ifdef(CONFIG_CLOCK_CONTROL_SMARTBOND           clock_control_smartbond.c)
 zephyr_library_sources_ifdef(CONFIG_CLOCK_CONTROL_NUMAKER_SCC         clock_control_numaker_scc.c)
 zephyr_library_sources_ifdef(CONFIG_CLOCK_CONTROL_NXP_S32             clock_control_nxp_s32.c)
+zephyr_library_sources_ifdef(CONFIG_CLOCK_CONTROL_RA                  clock_control_ra.c)
 
 
 if(CONFIG_CLOCK_CONTROL_STM32_CUBE)

drivers/clock_control/Kconfig

@@ -80,4 +80,6 @@ source "drivers/clock_control/Kconfig.nxp_s32"
 
 source "drivers/clock_control/Kconfig.agilex5"
 
+source "drivers/clock_control/Kconfig.ra"
+
 endif # CLOCK_CONTROL

drivers/clock_control/Kconfig.ra

@@ -0,0 +1,9 @@
+# Copyright (c) 2023 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
+# SPDX-License-Identifier: Apache-2.0
+
+config CLOCK_CONTROL_RA
+	bool "Renesas RA series clock generation circuit driver"
+	default y
+	depends on DT_HAS_RENESAS_RA_CLOCK_GENERATION_CIRCUIT_ENABLED
+	help
+	  Enable Renesas RA series clock generation circuit driver.