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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 <[email protected]>
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‎boards/arm/rcar_spider/Kconfig.board‎

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

‎boards/arm/rcar_spider/Kconfig.defconfig‎

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

‎boards/arm/rcar_spider/board.cmake‎

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

‎boards/arm/rcar_spider/rcar_spider_cr52-pinctrl.dtsi‎

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

‎boards/arm/rcar_spider/rcar_spider_cr52.dts‎

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/*
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* Copyright (c) 2023 IoT.bzh
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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*/
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/dts-v1/;
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#include <arm/renesas/rcar/gen4/r8a779f0.dtsi>
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#include "rcar_spider_cr52-pinctrl.dtsi"
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/ {
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model = "Renesas Spider board";
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compatible = "renesas,spider-cr52";
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chosen {
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zephyr,sram = &sram0;
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zephyr,console = &scif0;
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};
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leds {
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compatible = "gpio-leds";
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user_led: led_8 {
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gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;
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label = "User LED";
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};
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};
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gpio_keys {
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compatible = "gpio-keys";
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/* Supposedly not working (cant use GPIO4 because of pfss) */
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user_button: sw10 {
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gpios = <&gpio4 13 GPIO_ACTIVE_LOW>;
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label = "User switch";
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};
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};
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aliases {
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led0 = &user_led;
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sw0 = &user_button;
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};
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};
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&scif0 {
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pinctrl-0 = <&scif0_data_tx_default &scif0_data_rx_default>;
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pinctrl-names = "default";
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status = "okay";
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};
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&gpio0 {
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status = "okay";
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};
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&gpio4 {
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status = "okay";
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};

‎boards/arm/rcar_spider/rcar_spider_cr52.yaml‎

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identifier: rcar_spider_cr52
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name: Cortex r52 for Renesas Spider
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type: mcu
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arch: arm
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toolchain:
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- zephyr
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- gnuarmemb
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supported:
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- gpio
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- clock_control
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- uart

‎boards/arm/rcar_spider/rcar_spider_cr52_defconfig‎

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CONFIG_SOC_R8A779F0=y
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CONFIG_SOC_SERIES_RCAR_GEN4=y
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CONFIG_BOARD_RCAR_SPIDER_CR52=y
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CONFIG_CLOCK_CONTROL=y
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CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=12500000
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CONFIG_CONSOLE=y
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CONFIG_RAM_CONSOLE=y
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CONFIG_FLASH_SIZE=0
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CONFIG_FLASH_BASE_ADDRESS=0
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CONFIG_SERIAL=y
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CONFIG_UART_CONSOLE=y
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CONFIG_UART_INTERRUPT_DRIVEN=y
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CONFIG_GPIO=y

‎boards/arm/rcar_spider/support/openocd.cfg‎

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

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