arch/arm/boot/dts/allwinner/sunxi-bananapi-m2-plus-v1.2.dtsi

Source file repositories/reference/linux-study-clean/arch/arm/boot/dts/allwinner/sunxi-bananapi-m2-plus-v1.2.dtsi

File Facts

System
Linux kernel
Corpus path
arch/arm/boot/dts/allwinner/sunxi-bananapi-m2-plus-v1.2.dtsi
Extension
.dtsi
Size
847 bytes
Lines
43
Domain
Architecture Layer
Bucket
arch/arm
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) 2018 Chen-Yu Tsai <wens@csie.org>
 */

#include "sunxi-bananapi-m2-plus.dtsi"

/ {
	/*
	 * Bananapi M2+ v1.2 uses a GPIO line to change the effective
	 * resistance on the CPU regulator's feedback pin.
	 */
	reg_vdd_cpux: vdd-cpux {
		compatible = "regulator-gpio";
		regulator-name = "vdd-cpux";
		regulator-type = "voltage";
		regulator-boot-on;
		regulator-always-on;
		regulator-min-microvolt = <1108475>;
		regulator-max-microvolt = <1308475>;
		regulator-ramp-delay = <50>; /* 4ms */
		gpios = <&r_pio 0 1 GPIO_ACTIVE_HIGH>; /* PL1 */
		gpios-states = <0x1>;
		states = <1108475 0>, <1308475 1>;
	};
};

&cpu0 {
	cpu-supply = <&reg_vdd_cpux>;
};

&cpu1 {
	cpu-supply = <&reg_vdd_cpux>;
};

&cpu2 {
	cpu-supply = <&reg_vdd_cpux>;
};

&cpu3 {
	cpu-supply = <&reg_vdd_cpux>;
};

Annotation

Implementation Notes