Add an array of supported volume levels and a default volume level.
Signed-off-by: Manuel Traut <manuel.traut@xxxxxx>
---
.../devicetree/bindings/input/pwm-beeper.yaml | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/Documentation/devicetree/bindings/input/pwm-beeper.yaml b/Documentation/devicetree/bindings/input/pwm-beeper.yaml
index 1ebc3a46d934..7ea2954cdd6a 100644
--- a/Documentation/devicetree/bindings/input/pwm-beeper.yaml
+++ b/Documentation/devicetree/bindings/input/pwm-beeper.yaml
@@ -25,6 +25,18 @@ properties:
beeper-hz:
description: bell frequency in Hz
+ volume-levels-bp:
+ description: >
+ Please note that the actual volume of most beepers is
+ highly non-linear, which means that low volume levels
+ are probably somewhere in the range of 10 to 300 (0.1-3%
+ duty cycle).
+ maximum: 5000
+
+ default-volume-level-bp:
+ description: >
+ The default volume level.
+
required:
- compatible
- pwms
@@ -36,4 +48,6 @@ examples:
beeper {
compatible = "pwm-beeper";
pwms = <&pwm0>;
+ volume-levels-bp = <0 80 200 400 5000>;
+ default-volume-level-bp = <80>;
};
--
2.39.1
