arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts

Source file repositories/reference/linux-study-clean/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts

File Facts

System
Linux kernel
Corpus path
arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts
Extension
.dts
Size
4823 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)
/*
 * Supports Symphony evaluation board versions >= 1.4a.
 *
 * Copyright 2019-2020 Variscite Ltd.
 * Copyright (C) 2020 Krzysztof Kozlowski <krzk@kernel.org>
 */

/dts-v1/;

#include <dt-bindings/usb/pd.h>
#include "imx8mn-var-som.dtsi"

/ {
	model = "Variscite VAR-SOM-MX8MN Symphony evaluation board";
	compatible = "variscite,var-som-mx8mn-symphony", "variscite,var-som-mx8mn", "fsl,imx8mn";

	reg_usdhc2_vmmc: regulator-usdhc2-vmmc {
		compatible = "regulator-fixed";
		pinctrl-names = "default";
		pinctrl-0 = <&pinctrl_reg_usdhc2_vmmc>;
		regulator-name = "VSD_3V3";
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
		gpio = <&gpio4 22 GPIO_ACTIVE_HIGH>;
		enable-active-high;
	};

	gpio-keys {
		compatible = "gpio-keys";

		key-back {
			label = "Back";
			gpios = <&pca9534 1 GPIO_ACTIVE_LOW>;
			linux,code = <KEY_BACK>;
		};

		key-home {
			label = "Home";
			gpios = <&pca9534 2 GPIO_ACTIVE_LOW>;
			linux,code = <KEY_HOME>;
		};

		key-menu {
			label = "Menu";
			gpios = <&pca9534 3 GPIO_ACTIVE_LOW>;
			linux,code = <KEY_MENU>;
		};
	};

	leds {
		compatible = "gpio-leds";

		led {
			label = "Heartbeat";
			gpios = <&pca9534 0 GPIO_ACTIVE_LOW>;
			linux,default-trigger = "heartbeat";
		};
	};

	/* Peripherals supply, enabled by Q2 after SOM_3V3 rises. */
	reg_per_3v3: regulator-peripheral-3v3 {
		compatible = "regulator-fixed";
		regulator-name = "per_3v3";
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
		regulator-always-on;
	};
};

Annotation

Implementation Notes