arch/arm64/boot/dts/freescale/imx8mp-var-som-symphony.dts

Source file repositories/reference/linux-study-clean/arch/arm64/boot/dts/freescale/imx8mp-var-som-symphony.dts

File Facts

System
Linux kernel
Corpus path
arch/arm64/boot/dts/freescale/imx8mp-var-som-symphony.dts
Extension
.dts
Size
4453 bytes
Lines
157
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 2024 Variscite Ltd.
 */

#include "imx8mp-var-som.dtsi"

/ {
	model = "Variscite VAR-SOM-MX8M-PLUS on Symphony-Board";
	compatible = "variscite,var-som-mx8mp-symphony", "variscite,var-som-mx8mp", "fsl,imx8mp";

	chosen {
		stdout-path = &uart2;
	};

	gpio-leds {
		compatible = "gpio-leds";

		led-0 {
			function = LED_FUNCTION_POWER;
			gpios = <&pca9534 0 GPIO_ACTIVE_HIGH>;
			linux,default-trigger = "heartbeat";
		};
	};

	reg_usdhc2_vmmc: regulator-usdhc2-vmmc {
		compatible = "regulator-fixed";
		regulator-name = "VSD_3V3";
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
		gpios = <&gpio4 22 GPIO_ACTIVE_HIGH>;
		enable-active-high;
		startup-delay-us = <100>;
		off-on-delay-us = <12000>;
	};

	reg_usdhc2_vqmmc: regulator-usdhc2-vqmmc {
		compatible = "regulator-gpio";
		regulator-name = "VSD_VSEL";
		regulator-min-microvolt = <1800000>;
		regulator-max-microvolt = <3300000>;
		gpios = <&gpio2 12 GPIO_ACTIVE_HIGH>;
		states = <3300000 0x0 1800000 0x1>;
		vin-supply = <&ldo5>;
	};
};

&i2c3 {
	clock-frequency = <400000>;
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_i2c3>;
	status = "okay";

	/* GPIO expander */
	pca9534: gpio@20 {
		compatible = "nxp,pca9534";
		reg = <0x20>;
		pinctrl-names = "default";
		pinctrl-0 = <&pinctrl_pca9534>;
		gpio-controller;
		#gpio-cells = <2>;
		interrupt-parent = <&gpio1>;
		interrupts = <15 IRQ_TYPE_EDGE_FALLING>;
		wakeup-source;

		usb3-sata-sel-hog {
			gpio-hog;
			gpios = <4 0>;
			output-low;
			line-name = "usb3_sata_sel";

Annotation

Implementation Notes