FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/opp/opp-v1.yaml

     # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
     %YAML 1.2
     ---
     $id: http://devicetree.org/schemas/opp/opp-v1.yaml#
     $schema: http://devicetree.org/meta-schemas/core.yaml#
     
     title: Generic OPP (Operating Performance Points) v1 Bindings
     
     maintainers:
      - Viresh Kumar <viresh.kumar@linaro.org>
    
    description: |+
      Devices work at voltage-current-frequency combinations and some implementations
      have the liberty of choosing these. These combinations are called Operating
      Performance Points aka OPPs. This document defines bindings for these OPPs
      applicable across wide range of devices. For illustration purpose, this document
      uses CPU as a device.
    
      This binding only supports voltage-frequency pairs.
    
    select: true
    
    properties:
      operating-points:
        $ref: /schemas/types.yaml#/definitions/uint32-matrix
        items:
          items:
            - description: Frequency in kHz
            - description: Voltage for OPP in uV
    
    
    additionalProperties: true
    examples:
      - |
        cpus {
            #address-cells = <1>;
            #size-cells = <0>;
    
            cpu@0 {
                compatible = "arm,cortex-a9";
                device_type = "cpu";
                reg = <0>;
                next-level-cache = <&L2>;
                operating-points =
                    /* kHz    uV */
                    <792000 1100000>,
                    <396000 950000>,
                    <198000 850000>;
            };
        };
    ...

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