arch/arm64/boot/dts/renesas/r8a779f4-s4sk.dts

Source file repositories/reference/linux-study-clean/arch/arm64/boot/dts/renesas/r8a779f4-s4sk.dts

File Facts

System
Linux kernel
Corpus path
arch/arm64/boot/dts/renesas/r8a779f4-s4sk.dts
Extension
.dts
Size
3984 bytes
Lines
240
Domain
Architecture Layer
Bucket
arch/arm64
Inferred role
Architecture Layer: configuration, schema, or hardware description
Status
atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/*
 * Device Tree Source for the R-Car S4 Starter Kit board
 *
 * Copyright (C) 2023 Renesas Electronics Corp.
 */

/dts-v1/;
#include <dt-bindings/gpio/gpio.h>
#include "r8a779f4.dtsi"

/ {
	model = "R-Car S4 Starter Kit board";
	compatible = "renesas,s4sk", "renesas,r8a779f4", "renesas,r8a779f0";

	aliases {
		i2c0 = &i2c0;
		i2c1 = &i2c1;
		i2c2 = &i2c2;
		i2c3 = &i2c3;
		i2c4 = &i2c4;
		i2c5 = &i2c5;
		serial0 = &hscif0;
		serial1 = &hscif1;
		ethernet0 = &rswitch_port0;
		ethernet1 = &rswitch_port1;
	};

	chosen {
		bootargs = "ignore_loglevel rw root=/dev/nfs ip=on";
		stdout-path = "serial0:921600n8";
	};

	memory@48000000 {
		device_type = "memory";
		/* first 128MB is reserved for secure area. */
		/* The last 512MB is reserved for CR. */
		reg = <0x0 0x48000000 0x0 0x58000000>;
	};

	memory@480000000 {
		device_type = "memory";
		reg = <0x4 0x80000000 0x0 0x80000000>;
	};

	vcc_sdhi: regulator-vcc-sdhi {
		compatible = "regulator-fixed";
		regulator-name = "SDHI Vcc";
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
		gpio = <&gpio1 24 GPIO_ACTIVE_HIGH>;
		enable-active-high;
	};
};

&eth_serdes {
	status = "okay";
};

&extal_clk {
	clock-frequency = <20000000>;
};

&extalr_clk {
	clock-frequency = <32768>;
};

&hscif0 {
	pinctrl-0 = <&hscif0_pins>;
	pinctrl-names = "default";

Annotation

Implementation Notes