Commit 4c0a59e1 authored by Amit Kucheria's avatar Amit Kucheria Committed by Rob Herring
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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: default avatarAmit Kucheria <amit.kucheria@linaro.org>
Acked-by: default avatarSudeep Holla <sudeep.holla@arm.com>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
parent 57374808

Documentation/devicetree/bindings/arm/idle-states.txt

+10 −3
Original line number Diff line number Diff line
@@ -241,9 +241,13 @@ processor idle states, defined as device tree nodes, are listed. 
			   - "psci"

			# On ARM 32-bit systems this property is optional



The nodes describing the idle states (state) can only be defined within the

idle-states node, any other configuration is considered invalid and therefore

must be ignored.

This assumes that the "enable-method" property is set to "psci" in the cpu

node[6] that is responsible for setting up CPU idle management in the OS

implementation.



The nodes describing the idle states (state) can only be defined

within the idle-states node, any other configuration is considered invalid

and therefore must be ignored.



===========================================

4 - state node
@@ -697,3 +701,6 @@ cpus { 


[5] Devicetree Specification

    https://www.devicetree.org/specifications/



[6] ARM Linux Kernel documentation - Booting AArch64 Linux

    Documentation/arm64/booting.txt

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