| Message ID | 1392724051-11950-2-git-send-email-lorenzo.pieralisi@arm.com |
|---|---|
| State | New |
| Headers | show
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diff --git a/Documentation/devicetree/bindings/arm/psci.txt b/Documentation/devicetree/bindings/arm/psci.txt index 433afe9..797c48f 100644 --- a/Documentation/devicetree/bindings/arm/psci.txt +++ b/Documentation/devicetree/bindings/arm/psci.txt @@ -42,6 +42,14 @@ Main node optional properties: - migrate : Function ID for MIGRATE operation +Device tree nodes that require usage of PSCI CPU_SUSPEND function (ie idle +states bindings[1]) must specify the following properties: + +- entry-method-param + Usage: Required for idle states bindings [1]. + Value type: <u32> + Definition: power_state parameter to pass to the PSCI + suspend call. Example: @@ -53,3 +61,6 @@ Example: cpu_on = <0x95c10002>; migrate = <0x95c10003>; }; + +[1] Kernel documentation - ARM idle states bindings + Documentation/devicetree/bindings/arm/idle-states.txt
OS layers built on top of PSCI to enter low-power states require the power_state parameter to be passed to the PSCI CPU suspend method. This parameter is specific to a power state and platform specific, therefore must be provided by firmware to the OS in order to enable proper call sequence. This patch adds a property in the PSCI bindings that describes how the CPU suspend power_state parameter should be defined in DT in all device nodes that rely on PSCI CPU suspend method usage. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> --- Documentation/devicetree/bindings/arm/psci.txt | 11 +++++ 1 file changed, 11 insertions(+)