arch/arm64/boot/dts/allwinner/sun50i-a100-cpu-opp.dtsi

Source file repositories/reference/linux-study-clean/arch/arm64/boot/dts/allwinner/sun50i-a100-cpu-opp.dtsi

File Facts

System
Linux kernel
Corpus path
arch/arm64/boot/dts/allwinner/sun50i-a100-cpu-opp.dtsi
Extension
.dtsi
Size
2099 bytes
Lines
91
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) 2020 Yangtao Li <frank@allwinnertech.com>
// Copyright (c) 2020 ShuoSheng Huang <huangshuosheng@allwinnertech.com>

/ {
	cpu_opp_table: opp-table-cpu {
		compatible = "allwinner,sun50i-a100-operating-points";
		nvmem-cells = <&cpu_speed_grade>;
		opp-shared;

		opp-408000000 {
			clock-latency-ns = <244144>; /* 8 32k periods */
			opp-hz = /bits/ 64 <408000000>;

			opp-microvolt-speed0 = <900000>;
			opp-microvolt-speed1 = <900000>;
			opp-microvolt-speed2 = <900000>;
		};

		opp-600000000 {
			clock-latency-ns = <244144>; /* 8 32k periods */
			opp-hz = /bits/ 64 <600000000>;

			opp-microvolt-speed0 = <900000>;
			opp-microvolt-speed1 = <900000>;
			opp-microvolt-speed2 = <900000>;
		};

		opp-816000000 {
			clock-latency-ns = <244144>; /* 8 32k periods */
			opp-hz = /bits/ 64 <816000000>;

			opp-microvolt-speed0 = <940000>;
			opp-microvolt-speed1 = <900000>;
			opp-microvolt-speed2 = <900000>;
		};

		opp-1080000000 {
			clock-latency-ns = <244144>; /* 8 32k periods */
			opp-hz = /bits/ 64 <1080000000>;

			opp-microvolt-speed0 = <1020000>;
			opp-microvolt-speed1 = <980000>;
			opp-microvolt-speed2 = <950000>;
		};

		opp-1200000000 {
			clock-latency-ns = <244144>; /* 8 32k periods */
			opp-hz = /bits/ 64 <1200000000>;

			opp-microvolt-speed0 = <1100000>;
			opp-microvolt-speed1 = <1020000>;
			opp-microvolt-speed2 = <1000000>;
		};

		opp-1320000000 {
			clock-latency-ns = <244144>; /* 8 32k periods */
			opp-hz = /bits/ 64 <1320000000>;

			opp-microvolt-speed0 = <1160000>;
			opp-microvolt-speed1 = <1060000>;
			opp-microvolt-speed2 = <1030000>;
		};

		opp-1464000000 {
			clock-latency-ns = <244144>; /* 8 32k periods */
			opp-hz = /bits/ 64 <1464000000>;

			opp-microvolt-speed0 = <1180000>;
			opp-microvolt-speed1 = <1180000>;

Annotation

Implementation Notes