Adds an array of supported volume levels and a default volume level.

Signed-off-by: Manuel Traut <manuel.traut@mt.com>
---
 .../devicetree/bindings/input/pwm-beeper.yaml   | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/pwm-beeper.yaml b/Documentation/devicetree/bindings/input/pwm-beeper.yaml
index 1ebc3a46d934..ca9efab7efbf 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).
+      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).
+
+  default-volume-level-bp:
+    description: >
+      The default volume level.
+
 required:
   - compatible
   - pwms
@@ -36,4 +51,6 @@ examples:
     beeper {
       compatible = "pwm-beeper";
       pwms = <&pwm0>;
+      volume-levels = <0 8 20 40 500>;
+      default-volume-level = <4>;
     };
-- 
2.39.0

On 30/01/2023 14:56, Manuel Traut wrote:
> Adds an array of supported volume levels and a default volume level.
> 
> Signed-off-by: Manuel Traut <manuel.traut@mt.com>
> ---
>  .../devicetree/bindings/input/pwm-beeper.yaml   | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/input/pwm-beeper.yaml b/Documentation/devicetree/bindings/input/pwm-beeper.yaml
> index 1ebc3a46d934..ca9efab7efbf 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: >

Does not look like you tested the bindings. Please run `make
dt_binding_check` (see
Documentation/devicetree/bindings/writing-schema.rst for instructions).

Best regards,
Krzysztof

On Mon, 30 Jan 2023 14:56:49 +0100, Manuel Traut wrote:
> Adds an array of supported volume levels and a default volume level.
> 
> Signed-off-by: Manuel Traut <manuel.traut@mt.com>
> ---
>  .../devicetree/bindings/input/pwm-beeper.yaml   | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/input/pwm-beeper.example.dtb: beeper: 'default-volume-level', 'volume-levels' do not match any of the regexes: 'pinctrl-[0-9]+'
	From schema: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/input/pwm-beeper.yaml

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20230130135650.1407156-4-manuel.traut@mt.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.