52 lines
1.3 KiB
YAML
52 lines
1.3 KiB
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>;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
...
|