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-rw-r--r--Documentation/devicetree/bindings/arm/twd.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/twd.txt b/Documentation/devicetree/bindings/arm/twd.txt
index 75b8610939fa..383ea19c2bf0 100644
--- a/Documentation/devicetree/bindings/arm/twd.txt
+++ b/Documentation/devicetree/bindings/arm/twd.txt
@@ -19,6 +19,11 @@ interrupts.
- reg : Specify the base address and the size of the TWD timer
register window.
+Optional
+
+- always-on : a boolean property. If present, the timer is powered through
+ an always-on power domain, therefore it never loses context.
+
Example:
twd-timer@2c000600 {