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-rw-r--r--Documentation/devicetree/bindings/arm/psci.txt14
1 files changed, 13 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/arm/psci.txt b/Documentation/devicetree/bindings/arm/psci.txt
index b4a58f39223c..5aa40ede0e99 100644
--- a/Documentation/devicetree/bindings/arm/psci.txt
+++ b/Documentation/devicetree/bindings/arm/psci.txt
@@ -50,6 +50,16 @@ Main node optional properties:
- migrate : Function ID for MIGRATE operation
+Device tree nodes that require usage of PSCI CPU_SUSPEND function (ie idle
+state nodes, as per bindings in [1]) must specify the following properties:
+
+- arm,psci-suspend-param
+ Usage: Required for state nodes[1] if the corresponding
+ idle-states node entry-method property is set
+ to "psci".
+ Value type: <u32>
+ Definition: power_state parameter to pass to the PSCI
+ suspend call.
Example:
@@ -64,7 +74,6 @@ Case 1: PSCI v0.1 only.
migrate = <0x95c10003>;
};
-
Case 2: PSCI v0.2 only
psci {
@@ -88,3 +97,6 @@ Case 3: PSCI v0.2 and PSCI v0.1.
...
};
+
+[1] Kernel documentation - ARM idle states bindings
+ Documentation/devicetree/bindings/arm/idle-states.txt