Documentation/devicetree/bindings/opp/opp-v2.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/opp/opp-v2.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/opp/opp-v2.yaml
Extension
.yaml
Size
13898 bytes
Lines
476
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: configuration, schema, or hardware description
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/opp/opp-v2.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Generic OPP (Operating Performance Points)

maintainers:
  - Viresh Kumar <viresh.kumar@linaro.org>

allOf:
  - $ref: opp-v2-base.yaml#

properties:
  compatible:
    const: operating-points-v2

unevaluatedProperties: false

examples:
  - |
    /*
     * Example 1: Single cluster Dual-core ARM cortex A9, switch DVFS states
     * together.
     */
    cpus {
        #address-cells = <1>;
        #size-cells = <0>;

        cpu@0 {
            compatible = "arm,cortex-a9";
            device_type = "cpu";
            reg = <0>;
            next-level-cache = <&L2>;
            clocks = <&clk_controller 0>;
            clock-names = "cpu";
            cpu-supply = <&cpu_supply0>;
            operating-points-v2 = <&cpu0_opp_table0>;
        };

        cpu@1 {
            compatible = "arm,cortex-a9";
            device_type = "cpu";
            reg = <1>;
            next-level-cache = <&L2>;
            clocks = <&clk_controller 0>;
            clock-names = "cpu";
            cpu-supply = <&cpu_supply0>;
            operating-points-v2 = <&cpu0_opp_table0>;
        };
    };

    cpu0_opp_table0: opp-table {
        compatible = "operating-points-v2";
        opp-shared;

        opp-1000000000 {
            opp-hz = /bits/ 64 <1000000000>;
            opp-microvolt = <975000 970000 985000>;
            opp-microamp = <70000>;
            clock-latency-ns = <300000>;
            opp-suspend;
        };
        opp-1100000000 {
            opp-hz = /bits/ 64 <1100000000>;
            opp-microvolt = <1000000 980000 1010000>;
            opp-microamp = <80000>;
            clock-latency-ns = <310000>;
        };

Annotation

Implementation Notes