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Documentation: arm: Link idle-states binding to "enable-method" property
The "enable-method" property for cpu nodes needs to be "psci" for CPU
idle management to be setup correctly.
Add a note to the binding documentation to this effect to make it
obvious.
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
authored by
Amit Kucheria
and committed by
Rob Herring
4c0a59e1
57374808
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Documentation/devicetree/bindings/arm/idle-states.txt
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Documentation/devicetree/bindings/arm/idle-states.txt
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- "psci"
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# On ARM 32-bit systems this property is optional
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The nodes describing the idle states (state) can only be defined within the
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idle-states node, any other configuration is considered invalid and therefore
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must be ignored.
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This assumes that the "enable-method" property is set to "psci" in the cpu
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node[6] that is responsible for setting up CPU idle management in the OS
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implementation.
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The nodes describing the idle states (state) can only be defined
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within the idle-states node, any other configuration is considered invalid
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and therefore must be ignored.
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===========================================
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4 - state node
···
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[5] Devicetree Specification
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https://www.devicetree.org/specifications/
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[6] ARM Linux Kernel documentation - Booting AArch64 Linux
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Documentation/arm64/booting.txt