boards: arm: Add Renesas Spider support

Renesas Spider board use a S4 SoC (r8a779f0).

Add basic support for UART, GPIO and clock control.

We are using SCIF0 as SCIF3 is used by Linux.

Signed-off-by: Aymeric Aillet <aymeric.aillet@iot.bzh>

boards/arm/rcar_spider/Kconfig.board

@@ -0,0 +1,6 @@
+# Copyright (c) 2023 IoT.bzh
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_RCAR_SPIDER_CR52
+	bool "Cortex-R52 for Renesas Spider"
+	depends on SOC_R8A779F0

boards/arm/rcar_spider/Kconfig.defconfig

@@ -0,0 +1,9 @@
+# Copyright (c) 2023 IoT.bzh
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_RCAR_SPIDER_CR52
+
+config BOARD
+	default "rcar_spider_cr52"
+
+endif # BOARD_RCAR_SPIDER_CR52

boards/arm/rcar_spider/board.cmake

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: Apache-2.0
+board_runner_args(openocd "--use-elf")
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)

boards/arm/rcar_spider/rcar_spider_cr52-pinctrl.dtsi

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2023 IoT.bzh
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <dt-bindings/pinctrl/renesas/pinctrl-r8a779f0.h>
+
+&pfc {
+	scif0_data_tx_default: scif0_data_tx_default {
+		pin = <PIN_RX0 FUNC_RX0>;
+	};
+
+	scif0_data_rx_default: scif0_data_rx_default {
+		pin = <PIN_TX0 FUNC_TX0>;
+	};
+
+	scif3_data_tx_default: scif3_data_tx_default {
+		pin = <PIN_HTX0 FUNC_TX3>;
+	};
+
+	scif3_data_rx_default: scif3_data_rx_default {
+		pin = <PIN_HRX0 FUNC_RX3>;
+	};
+};

boards/arm/rcar_spider/rcar_spider_cr52.dts

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2023 IoT.bzh
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ */
+
+/dts-v1/;
+#include <arm/renesas/rcar/gen4/r8a779f0.dtsi>
+#include "rcar_spider_cr52-pinctrl.dtsi"
+#include <zephyr/dt-bindings/input/input-event-codes.h>
+
+/ {
+	model = "Renesas Spider board";
+	compatible = "renesas,spider-cr52";
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,console = &scif0;
+		zephyr,shell-uart = &scif0;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		user_led: led_8 {
+			gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;
+			label = "User LED";
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+		user_button: sw10 {
+			gpios = <&gpio4 13 GPIO_ACTIVE_LOW>;
+			label = "User switch";
+			zephyr,code = <INPUT_KEY_0>;
+		};
+	};
+
+	aliases {
+		led0 = &user_led;
+		sw0  = &user_button;
+	};
+};
+
+&scif0 {
+	pinctrl-0 = <&scif0_data_tx_default &scif0_data_rx_default>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&gpio4 {
+	status = "okay";
+};

boards/arm/rcar_spider/rcar_spider_cr52.yaml

@@ -0,0 +1,11 @@
+identifier: rcar_spider_cr52
+name: Cortex r52 for Renesas Spider
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+supported:
+  - gpio
+  - clock_control
+  - uart

boards/arm/rcar_spider/rcar_spider_cr52_defconfig

@@ -0,0 +1,13 @@
+CONFIG_SOC_R8A779F0=y
+CONFIG_SOC_SERIES_RCAR_GEN4=y
+CONFIG_BOARD_RCAR_SPIDER_CR52=y
+CONFIG_CLOCK_CONTROL=y
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=12500000
+CONFIG_CONSOLE=y
+CONFIG_RAM_CONSOLE=y
+CONFIG_FLASH_SIZE=0
+CONFIG_FLASH_BASE_ADDRESS=0
+CONFIG_SERIAL=y
+CONFIG_UART_CONSOLE=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+CONFIG_GPIO=y

boards/arm/rcar_spider/support/openocd.cfg

@@ -0,0 +1,27 @@
+# Renesas R-Car Spider S4 Cortex-R52 Board Config
+
+source [find interface/ftdi/olimex-arm-usb-ocd-h.cfg]
+source [find target/renesas_rcar_reset_common.cfg]
+
+set _CHIPNAME r8a779f0
+set _CORE_NAME r52
+set _TARGETNAME $_CHIPNAME.$_CORE_NAME
+set _CTINAME $_TARGETNAME.cti
+set _DAPNAME $_CHIPNAME.dap
+set DAP_TAPID 0x5ba00477
+
+set CR52_DBGBASE 0x80c10000
+set CR52_CTIBASE 0x80c20000
+
+adapter srst delay 1000
+adapter speed 20000
+global $_CHIPNAME
+transport select jtag
+
+jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x01 -irmask 0x0f -expected-id $DAP_TAPID
+dap create $_DAPNAME -chain-position $_CHIPNAME.cpu
+
+cti create $_CTINAME -dap $_DAPNAME -ap-num 1 -baseaddr $CR52_CTIBASE
+target create $_TARGETNAME armv8r -dap $_DAPNAME -ap-num 1 -dbgbase $CR52_DBGBASE -cti $_CTINAME
+
+$_TARGETNAME configure -rtos auto