77 lines
2.1 KiB
YAML
77 lines
2.1 KiB
YAML
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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/power/domain-idle-state.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: PM Domain Idle States
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maintainers:
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- Ulf Hansson <ulf.hansson@linaro.org>
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description:
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A domain idle state node represents the state parameters that will be used to
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select the state when there are no active components in the PM domain.
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properties:
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$nodename:
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const: domain-idle-states
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patternProperties:
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"^(cpu|cluster|domain)-":
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type: object
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additionalProperties: false
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description:
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Each state node represents a domain idle state description.
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properties:
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compatible:
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const: domain-idle-state
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entry-latency-us:
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description:
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The worst case latency in microseconds required to enter the idle
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state. Note that, the exit-latency-us duration may be guaranteed only
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after the entry-latency-us has passed.
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exit-latency-us:
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description:
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The worst case latency in microseconds required to exit the idle
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state.
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min-residency-us:
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description:
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The minimum residency duration in microseconds after which the idle
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state will yield power benefits, after overcoming the overhead while
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entering the idle state.
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arm,psci-suspend-param:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: |
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power_state parameter to pass to the ARM PSCI suspend call.
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Device tree nodes that require usage of PSCI CPU_SUSPEND function
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(i.e. idle states node with entry-method property is set to "psci")
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must specify this property.
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required:
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- compatible
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- entry-latency-us
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- exit-latency-us
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- min-residency-us
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additionalProperties: false
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examples:
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- |
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domain-idle-states {
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domain_retention: domain-retention {
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compatible = "domain-idle-state";
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entry-latency-us = <20>;
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exit-latency-us = <40>;
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min-residency-us = <80>;
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};
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};
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...
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