arch/arm/boot/dts/renesas/r8a7742-iwg21d-q7.dts

Source file repositories/reference/linux-study-clean/arch/arm/boot/dts/renesas/r8a7742-iwg21d-q7.dts

File Facts

System
Linux kernel
Corpus path
arch/arm/boot/dts/renesas/r8a7742-iwg21d-q7.dts
Extension
.dts
Size
8038 bytes
Lines
445
Domain
Architecture Layer
Bucket
arch/arm
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
/*
 * Device Tree Source for the iWave-RZ/G1H Qseven board
 *
 * Copyright (C) 2020 Renesas Electronics Corp.
 */

/*
 * SSI-SGTL5000
 *
 * This command is required when Playback/Capture
 *
 *      amixer set "DVC Out" 100%
 *      amixer set "DVC In" 100%
 *
 * You can use Mute
 *
 *      amixer set "DVC Out Mute" on
 *      amixer set "DVC In Mute" on
 *
 * You can use Volume Ramp
 *
 *      amixer set "DVC Out Ramp Up Rate"   "0.125 dB/64 steps"
 *      amixer set "DVC Out Ramp Down Rate" "0.125 dB/512 steps"
 *      amixer set "DVC Out Ramp" on
 *      aplay xxx.wav &
 *      amixer set "DVC Out"  80%  // Volume Down
 *      amixer set "DVC Out" 100%  // Volume Up
 */

/dts-v1/;
#include "r8a7742-iwg21m.dtsi"
#include <dt-bindings/pwm/pwm.h>

/ {
	model = "iWave Systems RainboW-G21D-Qseven board based on RZ/G1H";
	compatible = "iwave,g21d", "iwave,g21m", "renesas,r8a7742";

	aliases {
		serial2 = &scifa2;
		serial4 = &scifb2;
		ethernet0 = &avb;
	};

	chosen {
		bootargs = "ignore_loglevel root=/dev/mmcblk0p1 rw rootwait";
		stdout-path = "serial2:115200n8";
	};

	audio_clock: audio_clock {
		compatible = "fixed-clock";
		#clock-cells = <0>;
		clock-frequency = <26000000>;
	};

	lcd_backlight: backlight {
		compatible = "pwm-backlight";
		pwms = <&tpu 2 5000000 0>;
		brightness-levels = <0 4 8 16 32 64 128 255>;
		pinctrl-0 = <&backlight_pins>;
		pinctrl-names = "default";
		default-brightness-level = <7>;
		enable-gpios = <&gpio3 11 GPIO_ACTIVE_HIGH>;
	};

	leds {
		compatible = "gpio-leds";

		sdhi2_led {
			label = "sdio-led";

Annotation

Implementation Notes