netdev - Re: [PATCH net 1/2] dt: ar803x: Document disable-hibernation property

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Date:   Fri, 12 Aug 2022 10:27:46 +0300
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     wei.fang@....com, andrew@...n.ch, hkallweit1@...il.com,
        linux@...linux.org.uk, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, f.fainelli@...il.com,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net 1/2] dt: ar803x: Document disable-hibernation property

On 12/08/2022 17:50, wei.fang@....com wrote:
> From: Wei Fang <wei.fang@....com>
> 

Please use subject prefix matching subsystem.

> The hibernation mode of Atheros AR803x PHYs is default enabled.
> When the cable is unplugged, the PHY will enter hibernation
> mode and the PHY clock does down. For some MACs, it needs the
> clock to support it's logic. For instance, stmmac needs the PHY
> inputs clock is present for software reset completion. Therefore,
> It is reasonable to add a DT property to disable hibernation mode.
> 
> Signed-off-by: Wei Fang <wei.fang@....com>
> ---
>  Documentation/devicetree/bindings/net/qca,ar803x.yaml | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/qca,ar803x.yaml b/Documentation/devicetree/bindings/net/qca,ar803x.yaml
> index b3d4013b7ca6..d08431d79b83 100644
> --- a/Documentation/devicetree/bindings/net/qca,ar803x.yaml
> +++ b/Documentation/devicetree/bindings/net/qca,ar803x.yaml
> @@ -40,6 +40,12 @@ properties:
>        Only supported on the AR8031.
>      type: boolean
>  
> +  qca,disable-hibernation:
> +    description: |
> +    If set, the PHY will not enter hibernation mode when the cable is
> +    unplugged.

Wrong indentation. Did you test the bindings?

Unfortunately the property describes driver behavior not hardware, so it
is not suitable for DT. Instead describe the hardware
characteristics/features/bugs/constraints. Not driver behavior. Both in
property name and property description.

Best regards,
Krzysztof