linux-kernel - Re: [PATCH 2/2] dt-bindings: hwmon: Add sample averaging property for ADM1275

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Date:   Wed, 23 Feb 2022 18:14:55 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Potin Lai <potin.lai@...ntatw.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Jean Delvare <jdelvare@...e.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Patrick Williams <patrick@...cx.xyz>, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 2/2] dt-bindings: hwmon: Add sample averaging property for
 ADM1275

On 23/02/2022 17:38, Potin Lai wrote:
> Add binding information for "pwr-avg" and "vi-avg" properties
> 
> Signed-off-by: Potin Lai <potin.lai@...ntatw.com>
> ---
>  .../devicetree/bindings/hwmon/adi,adm1275.yaml         | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml b/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml
> index 223393d7cafd..2525a67a880e 100644
> --- a/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml
> +++ b/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml
> @@ -37,6 +37,14 @@ properties:
>      description:
>        Shunt resistor value in micro-Ohm.
>  
> +  vi-avg:
> +    description:
> +      Sample averaging for current and voltage.

Both do not look like generic properties, so you need:
 - type
 - vendor prefix ("adi,")
 - maximum value?

It would be nice to actually explain what this value means - number of
readings for each averaging (unless it is obvious in the domain...)?

Does the hardware have default value?

> +
> +  pwr-avg:
> +    description:
> +      Sample averaging for power.
> +
>  required:
>    - compatible
>    - reg
> @@ -53,5 +61,7 @@ examples:
>              compatible = "adi,adm1272";
>              reg = <0x10>;
>              shunt-resistor-micro-ohms = <500>;
> +            vi-avg = <128>;
> +            pwr-avg = <128>;
>          };
>      };


Best regards,
Krzysztof