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# 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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