Re: [PATCH v10 3/4] dt-bindings: input: pwm-beeper: add volume
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From: Krzysztof Kozlowski <hidden>
Date: 2023-02-01 16:15:41
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On 01/02/2023 16:21, Manuel Traut wrote:
Adds an array of supported volume levels and a default volume level.
Adds -> Add
Signed-off-by: Manuel Traut <redacted> --- .../devicetree/bindings/input/pwm-beeper.yaml | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
Thank you for your patch. There is something to discuss/improve.
quoted hunk ↗ jump to hunk
diff --git a/Documentation/devicetree/bindings/input/pwm-beeper.yaml b/Documentation/devicetree/bindings/input/pwm-beeper.yaml index 1ebc3a46d934..6599e28ba5e6 100644 --- a/Documentation/devicetree/bindings/input/pwm-beeper.yaml +++ b/Documentation/devicetree/bindings/input/pwm-beeper.yaml@@ -25,6 +25,21 @@ properties: beeper-hz: description: bell frequency in Hz + volume-levels-bp: + description: > + Array of PWM duty cycle values that correspond to + linear volume levels. These need to be in the range of + 0 to 5000, while 0 means 0% duty cycle (mute) and 5000 + means 50% duty cycle (max volume).
Is range 0-5000 limitation of the device? If so, this should not be free-form text, but "maximum: 5000" (minimum is 0 anyway).
quoted hunk ↗ jump to hunk
+ 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).
Best regards, Krzysztof