arch/arm64/boot/dts/freescale/imx8mq-tqma8mq.dtsi

Source file repositories/reference/linux-study-clean/arch/arm64/boot/dts/freescale/imx8mq-tqma8mq.dtsi

File Facts

System
Linux kernel
Corpus path
arch/arm64/boot/dts/freescale/imx8mq-tqma8mq.dtsi
Extension
.dtsi
Size
8904 bytes
Lines
363
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-later OR MIT)
/*
 * Copyright 2019-2021 TQ-Systems GmbH
 */

#include "imx8mq.dtsi"

/ {
	model = "TQ-Systems GmbH i.MX8MQ TQMa8MQ";
	compatible = "tq,imx8mq-tqma8mq", "fsl,imx8mq";

	memory@40000000 {
		device_type = "memory";
		/*  our minimum RAM config will be 1024 MiB */
		reg = <0x00000000 0x40000000 0 0x40000000>;
	};

	/* e-MMC IO, needed for HS modes */
	reg_vcc1v8: regulator-vcc1v8 {
		compatible = "regulator-fixed";
		regulator-name = "TQMA8MX_VCC1V8";
		regulator-min-microvolt = <1800000>;
		regulator-max-microvolt = <1800000>;
	};

	reg_vcc3v3: regulator-vcc3v3 {
		compatible = "regulator-fixed";
		regulator-name = "TQMA8MX_VCC3V3";
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
	};

	reg_vdd_arm: regulator-vdd-arm {
		compatible = "regulator-gpio";
		pinctrl-names = "default";
		pinctrl-0 = <&pinctrl_dvfs>;
		regulator-min-microvolt = <900000>;
		regulator-max-microvolt = <1000000>;
		regulator-name = "TQMa8Mx_DVFS";
		regulator-type = "voltage";
		regulator-settling-time-us = <150000>;
		gpios = <&gpio1 6 GPIO_ACTIVE_LOW>;
		states = <900000 0x1 1000000 0x0>;
	};

	reserved-memory {
		#address-cells = <2>;
		#size-cells = <2>;
		ranges;

		/* global autoconfigured region for contiguous allocations */
		linux,cma {
			compatible = "shared-dma-pool";
			reusable;
			/* 640 MiB */
			size = <0 0x28000000>;
			/*  1024 - 128 MiB, our minimum RAM config will be 1024 MiB */
			alloc-ranges = <0 0x40000000 0 0x78000000>;
			linux,cma-default;
		};
	};
};

&A53_0 {
	cpu-supply = <&reg_vdd_arm>;
};

&A53_1 {
	cpu-supply = <&reg_vdd_arm>;
};

Annotation

Implementation Notes