arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts

Source file repositories/reference/linux-study-clean/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts

File Facts

System
Linux kernel
Corpus path
arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
Extension
.dts
Size
5750 bytes
Lines
296
Domain
Architecture Layer
Bucket
arch/riscv
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) 2020 SiFive, Inc */

#include "fu740-c000.dtsi"
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/leds/common.h>
#include <dt-bindings/pwm/pwm.h>

/* Clock frequency (in Hz) of the PCB crystal for rtcclk */
#define RTCCLK_FREQ		1000000

/ {
	model = "SiFive HiFive Unmatched A00";
	compatible = "sifive,hifive-unmatched-a00", "sifive,fu740-c000",
		     "sifive,fu740";

	chosen {
		stdout-path = "serial0";
	};

	cpus {
		timebase-frequency = <RTCCLK_FREQ>;
	};

	memory@80000000 {
		device_type = "memory";
		reg = <0x0 0x80000000 0x4 0x00000000>;
	};

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

	rtcclk: rtcclk {
		#clock-cells = <0>;
		compatible = "fixed-clock";
		clock-frequency = <RTCCLK_FREQ>;
		clock-output-names = "rtcclk";
	};

	gpio-poweroff {
		compatible = "gpio-poweroff";
		gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
	};

	fan1 {
		compatible = "pwm-fan";
		pwms = <&pwm1 2 7812500 0>;
	};

	fan2 {
		compatible = "pwm-fan";
		pwms = <&pwm1 3 7812500 0>;
	};

	led-controller-1 {
		compatible = "pwm-leds";

		led-d12 {
			pwms = <&pwm0 0 7812500 0>;
			color = <LED_COLOR_ID_GREEN>;
			max-brightness = <255>;
			label = "d12";
		};
	};

Annotation

Implementation Notes