arch/arm64/boot/dts/amlogic/amlogic-a4-common.dtsi

Source file repositories/reference/linux-study-clean/arch/arm64/boot/dts/amlogic/amlogic-a4-common.dtsi

File Facts

System
Linux kernel
Corpus path
arch/arm64/boot/dts/amlogic/amlogic-a4-common.dtsi
Extension
.dtsi
Size
2077 bytes
Lines
81
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) 2024 Amlogic, Inc. All rights reserved.
 */

#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/gpio/gpio.h>
/ {
	timer {
		compatible = "arm,armv8-timer";
		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
	};

	psci {
		compatible = "arm,psci-1.0";
		method = "smc";
	};

	xtal: xtal-clk {
		compatible = "fixed-clock";
		clock-frequency = <24000000>;
		clock-output-names = "xtal";
		#clock-cells = <0>;
	};

	soc {
		compatible = "simple-bus";
		#address-cells = <2>;
		#size-cells = <2>;
		ranges;

		gic: interrupt-controller@fff01000 {
			compatible = "arm,gic-400";
			reg = <0x0 0xfff01000 0 0x1000>,
			      <0x0 0xfff02000 0 0x2000>,
			      <0x0 0xfff04000 0 0x2000>,
			      <0x0 0xfff06000 0 0x2000>;
			#interrupt-cells = <3>;
			#address-cells = <0>;
			interrupt-controller;
			interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
		};

		apb: bus@fe000000 {
			compatible = "simple-bus";
			reg = <0x0 0xfe000000 0x0 0x480000>;
			#address-cells = <2>;
			#size-cells = <2>;
			ranges = <0x0 0x0 0x0 0xfe000000 0x0 0x480000>;

			watchdog@2100 {
				compatible = "amlogic,a4-wdt", "amlogic,t7-wdt";
				reg = <0x0 0x2100 0x0 0x10>;
				clocks = <&xtal>;
			};

			uart_b: serial@7a000 {
				compatible = "amlogic,a4-uart",
					     "amlogic,meson-s4-uart";
				reg = <0x0 0x7a000 0x0 0x18>;
				interrupts = <GIC_SPI 169 IRQ_TYPE_EDGE_RISING>;
				clocks = <&xtal>, <&xtal>, <&xtal>;
				clock-names = "xtal", "pclk", "baud";
				status = "disabled";
			};

Annotation

Implementation Notes