arch/arm64/boot/dts/amlogic/meson-gxbb-p20x.dtsi

Source file repositories/reference/linux-study-clean/arch/arm64/boot/dts/amlogic/meson-gxbb-p20x.dtsi

File Facts

System
Linux kernel
Corpus path
arch/arm64/boot/dts/amlogic/meson-gxbb-p20x.dtsi
Extension
.dtsi
Size
4664 bytes
Lines
248
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) 2016 Andreas Färber
 * Copyright (c) 2016 BayLibre, Inc.
 * Author: Kevin Hilman <khilman@kernel.org>
 */

#include "meson-gxbb.dtsi"

/ {
	aliases {
		serial0 = &uart_AO;
		ethernet0 = &ethmac;
	};

	chosen {
		stdout-path = "serial0:115200n8";
	};

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

	usb_pwr: regulator-usb-pwrs {
		compatible = "regulator-fixed";

		regulator-name = "USB_PWR";

		regulator-min-microvolt = <5000000>;
		regulator-max-microvolt = <5000000>;

		/* signal name in schematic: USB_PWR_EN */
		gpio = <&gpio GPIODV_24 GPIO_ACTIVE_HIGH>;
		enable-active-high;
	};

	vddio_card: gpio-regulator {
		compatible = "regulator-gpio";

		regulator-name = "VDDIO_CARD";
		regulator-min-microvolt = <1800000>;
		regulator-max-microvolt = <3300000>;

		gpios = <&gpio_ao GPIOAO_5 GPIO_ACTIVE_HIGH>;
		gpios-states = <1>;

		/* Based on P200 schematics, signal CARD_1.8V/3.3V_CTR */
		states = <1800000 0>,
			 <3300000 1>;

		regulator-settling-time-up-us = <10000>;
		regulator-settling-time-down-us = <150000>;
	};

	vddio_boot: regulator-vddio-boot {
		compatible = "regulator-fixed";
		regulator-name = "VDDIO_BOOT";
		regulator-min-microvolt = <1800000>;
		regulator-max-microvolt = <1800000>;
	};

	vddao_3v3: regulator-vddao-3v3 {
		compatible = "regulator-fixed";
		regulator-name = "VDDAO_3V3";
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
	};

	vcc_3v3: regulator-vcc-3v3 {

Annotation

Implementation Notes