linux-kernel - Re: [PATCH V2] dt-bindings: input: pwm-beeper: convert to dt schema

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Date:   Tue, 4 Apr 2023 07:59:16 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>, dmitry.torokhov@...il.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        s.hauer@...gutronix.de
Cc:     linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Peng Fan <peng.fan@....com>
Subject: Re: [PATCH V2] dt-bindings: input: pwm-beeper: convert to dt schema

On 03/04/2023 11:06, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> Convert the binding doc to dt schema, and also fixed the
> example from fixed-regulator to regulator-fixed.
> 
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
> 
> V2:
>  License update
>  Don't need to show providers
>  Make example complete
>  Decrease beeper hz

Why?

>  Misc update
> 
>  .../devicetree/bindings/input/pwm-beeper.txt  | 24 -----------
>  .../devicetree/bindings/input/pwm-beeper.yaml | 42 +++++++++++++++++++
>  2 files changed, 42 insertions(+), 24 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/input/pwm-beeper.txt
>  create mode 100644 Documentation/devicetree/bindings/input/pwm-beeper.yaml
> 
> diff --git a/Documentation/devicetree/bindings/input/pwm-beeper.txt b/Documentation/devicetree/bindings/input/pwm-beeper.txt
> deleted file mode 100644
> index 8fc0e48c20db..000000000000
> --- a/Documentation/devicetree/bindings/input/pwm-beeper.txt
> +++ /dev/null
> @@ -1,24 +0,0 @@
> -* PWM beeper device tree bindings
> -
> -Registers a PWM device as beeper.
> -
> -Required properties:
> -- compatible: should be "pwm-beeper"
> -- pwms: phandle to the physical PWM device
> -
> -Optional properties:
> -- amp-supply: phandle to a regulator that acts as an amplifier for the beeper
> -- beeper-hz:  bell frequency in Hz
> -
> -Example:
> -
> -beeper_amp: amplifier {
> -	compatible = "fixed-regulator";
> -	gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
> -};
> -
> -beeper {
> -	compatible = "pwm-beeper";
> -	pwms = <&pwm0>;
> -	amp-supply = <&beeper_amp>;
> -};
> diff --git a/Documentation/devicetree/bindings/input/pwm-beeper.yaml b/Documentation/devicetree/bindings/input/pwm-beeper.yaml
> new file mode 100644
> index 000000000000..a3797f338f46
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/pwm-beeper.yaml
> @@ -0,0 +1,42 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/input/pwm-beeper.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: PWM beeper
> +
> +maintainers:
> +  - Sascha Hauer <s.hauer@...gutronix.de>
> +
> +properties:
> +  compatible:
> +    const: pwm-beeper
> +
> +  pwms:
> +    description: Phandle to the physical PWM device

Drop description.

> +    maxItems: 1
> +
> +  amp-supply:
> +    description: Phandle to a regulator that acts as an amplifier for the beeper

Drop "Phandle to a regulator that acts as "

> +
> +  beeper-hz:
> +    description: bell frequency in Hz
> +    minimum: 1
> +    maximum: 4

default is 1000, so how constraints can be lower than default? Also -
missing default.

Best regards,
Krzysztof