arch/arm64/boot/dts/amlogic/meson-s4-s805x2-aq222.dts

Source file repositories/reference/linux-study-clean/arch/arm64/boot/dts/amlogic/meson-s4-s805x2-aq222.dts

File Facts

System
Linux kernel
Corpus path
arch/arm64/boot/dts/amlogic/meson-s4-s805x2-aq222.dts
Extension
.dts
Size
4493 bytes
Lines
238
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)
/*
 * Copyright (c) 2021 Amlogic, Inc. All rights reserved.
 */

/dts-v1/;

#include "meson-s4.dtsi"

/ {
	model = "Amlogic Meson S4 AQ222 Development Board";
	compatible = "amlogic,aq222", "amlogic,s805x2", "amlogic,s4";
	interrupt-parent = <&gic>;
	#address-cells = <2>;
	#size-cells = <2>;

	aliases {
		serial0 = &uart_b;
	};

	memory@0 {
		device_type = "memory";
		reg = <0x0 0x0 0x0 0x40000000>;
	};

	reserved-memory {
		#address-cells = <2>;
		#size-cells = <2>;
		ranges;

		/* 52 MiB reserved for ARM Trusted Firmware */
		secmon_reserved: secmon@5000000 {
			reg = <0x0 0x05000000 0x0 0x3400000>;
			no-map;
		};
	};

	sdio_32k: sdio-32k {
		compatible = "pwm-clock";
		#clock-cells = <0>;
		clock-frequency = <32768>;
		pwms = <&pwm_ef 0 30518 0>; /* PWM_E at 32.768KHz */
	};

	sdio_pwrseq: sdio-pwrseq {
		compatible = "mmc-pwrseq-simple";
		reset-gpios = <&gpio GPIOX_6 GPIO_ACTIVE_LOW>;
		clocks = <&sdio_32k>;
		clock-names = "ext_clock";
	};

	main_12v: regulator-main-12v {
		compatible = "regulator-fixed";
		regulator-name = "12V";
		regulator-min-microvolt = <12000000>;
		regulator-max-microvolt = <12000000>;
		regulator-always-on;
	};

	vddao_3v3: regulator-vddao-3v3 {
		compatible = "regulator-fixed";
		regulator-name = "VDDAO_3V3";
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
		vin-supply = <&main_12v>;
		regulator-always-on;
	};

	vddio_ao1v8: regulator-vddio-ao1v8 {
	       compatible = "regulator-fixed";

Annotation

Implementation Notes