diff options
| author | Amit Kucheria <amit.kucheria@linaro.org> | 2019-05-21 15:05:12 +0530 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2019-06-13 17:13:32 -0600 |
| commit | 4c0a59e1123f90b773d46942a6d505b3cb5bd406 (patch) | |
| tree | a002212b35a7b0364f6bebb30c6593fafa625e8d | |
| parent | 573748081a66b2baacce5e0927c700e480a60c7c (diff) | |
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>
| -rw-r--r-- | Documentation/devicetree/bindings/arm/idle-states.txt | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/arm/idle-states.txt b/Documentation/devicetree/bindings/arm/idle-states.txt index 45730ba60af5..3bdbe675b9e6 100644 --- a/Documentation/devicetree/bindings/arm/idle-states.txt +++ b/Documentation/devicetree/bindings/arm/idle-states.txt @@ -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 |