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80728bfa8c
The Arm CPU schema is missing a number of properties already in use. This has gone unnoticed as extra properties have not been restricted. Add a missing reference to cpu.yaml, and add all the missing properties. As "clock-latency" and "voltage-tolerance" are related to opp-v1, add those properties to the opp-v1.yaml schema. With this, other properties can be prevented from creeping in with 'unevaluatedProperties: false'. Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Link: https://lore.kernel.org/r/20250410-dt-cpu-schema-v2-15-63d7dc9ddd0a@kernel.org Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
68 lines
1.8 KiB
YAML
68 lines
1.8 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/opp/opp-v1.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Generic OPP (Operating Performance Points) v1
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maintainers:
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- Viresh Kumar <viresh.kumar@linaro.org>
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description: |+
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Devices work at voltage-current-frequency combinations and some implementations
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have the liberty of choosing these. These combinations are called Operating
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Performance Points aka OPPs. This document defines bindings for these OPPs
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applicable across wide range of devices. For illustration purpose, this document
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uses CPU as a device.
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This binding only supports voltage-frequency pairs.
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deprecated: true
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properties:
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clock-latency:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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The latency in nanoseconds for clock changes. Use OPP tables for new
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designs instead.
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voltage-tolerance:
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$ref: /schemas/types.yaml#/definitions/uint32
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maximum: 10
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description:
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The voltage tolerance in percent. Use OPP tables for new designs instead.
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operating-points:
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$ref: /schemas/types.yaml#/definitions/uint32-matrix
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items:
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items:
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- description: Frequency in kHz
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- description: Voltage for OPP in uV
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dependencies:
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clock-latency: [ operating-points ]
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voltage-tolerance: [ operating-points ]
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additionalProperties: true
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examples:
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- |
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cpus {
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#address-cells = <1>;
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#size-cells = <0>;
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cpu@0 {
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compatible = "arm,cortex-a9";
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device_type = "cpu";
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reg = <0>;
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next-level-cache = <&L2>;
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operating-points =
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/* kHz uV */
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<792000 1100000>,
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<396000 950000>,
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<198000 850000>;
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};
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};
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...
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