linux-kernel - Re: [PATCH 2/4] dt-bindings: mfd: rk809: Add audio codec properties

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Message-ID: <5c4a6d57-82e0-430b-a12e-59c331a32eab@linaro.org>
Date: Mon, 6 May 2024 12:47:34 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Jonas Karlman <jonas@...boo.se>, Heiko Stuebner <heiko@...ech.de>,
 Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Lee Jones <lee@...nel.org>,
 Chris Zhong <zyw@...k-chips.com>, Zhang Qing <zhangqing@...k-chips.com>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] dt-bindings: mfd: rk809: Add audio codec properties

On 05/05/2024 15:41, Jonas Karlman wrote:
> Similar to RK817 the RK809 also integrates a complete audio system.
> 
> Add audio codec properties to binding to reflect this.
> 
> Signed-off-by: Jonas Karlman <jonas@...boo.se>

Except sending untested patches...

> ---
>  .../bindings/mfd/rockchip,rk809.yaml          | 34 ++++++++++++++++++-
>  1 file changed, 33 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/rockchip,rk809.yaml b/Documentation/devicetree/bindings/mfd/rockchip,rk809.yaml
> index c951056b8b4d..b78e1b090105 100644
> --- a/Documentation/devicetree/bindings/mfd/rockchip,rk809.yaml
> +++ b/Documentation/devicetree/bindings/mfd/rockchip,rk809.yaml
> @@ -12,7 +12,7 @@ maintainers:
>  
>  description: |
>    Rockchip RK809 series PMIC. This device consists of an i2c controlled MFD
> -  that includes regulators, an RTC, and power button.
> +  that includes regulators, an RTC, a power button and an audio codec.
>  
>  properties:
>    compatible:
> @@ -93,6 +93,34 @@ properties:
>          unevaluatedProperties: false
>      unevaluatedProperties: false
>  
> +  clocks:
> +    description:
> +      The input clock for the audio codec.

No, this allows anything. You must be here specific, see example-schema.
maxItems: 1

Drop description, redundant.

> +
> +  clock-names:
> +    description:
> +      The clock name for the codec clock.

Drop description, redundant.

> +    items:
> +      - const: mclk
> +
> +  '#sound-dai-cells':
> +    description:
> +      Needed for the interpretation of sound dais.

Drop description, redundant. Do you see it anywhere for such properties?

> +    const: 0


Missing ref to dai-common in your allOf (again: take a look how other
bindings are doing it).


> +
> +  codec:
> +    description: |

Do not need '|' unless you need to preserve formatting.

> +      The child node for the codec to hold additional properties. If no
> +      additional properties are required for the codec, this node can be
> +      omitted.

That's useless description. Describe hardware, not syntax. This must say
what this node represents.

Anyway drop it. You do not have any resources there, so put properties
in top level.


> +    type: object
> +    additionalProperties: false
> +    properties:
> +      rockchip,mic-in-differential:
> +        type: boolean
> +        description:
> +          Describes if the microphone uses differential mode.

Your description copies property name. Do not describe the syntax
"Description describes", but say what is it.

> +
>  allOf:
>    - if:
>        properties:
> @@ -284,5 +312,9 @@ examples:
>                      };
>                  };
>              };
> +
> +            rk809_codec: codec {
> +                rockchip,mic-in-differential;

Missing all other properties. Make your example complete.

Best regards,
Krzysztof