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-rw-r--r--Documentation/devicetree/bindings/input/pwm-beeper.txt1
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/pwm-beeper.txt b/Documentation/devicetree/bindings/input/pwm-beeper.txt
index 529408b4431a..8fc0e48c20db 100644
--- a/Documentation/devicetree/bindings/input/pwm-beeper.txt
+++ b/Documentation/devicetree/bindings/input/pwm-beeper.txt
@@ -8,6 +8,7 @@ Required properties:
Optional properties:
- amp-supply: phandle to a regulator that acts as an amplifier for the beeper
+- beeper-hz: bell frequency in Hz
Example: