linux-kernel - Re: [PATCH net-next v4 1/3] dt-bindings: net: snps,dwmac: add phy-supply support

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Message-ID: <20230721142433.GA1012219-robh@kernel.org>
Date:   Fri, 21 Jul 2023 08:24:33 -0600
From:   Rob Herring <robh@...nel.org>
To:     Marco Felsch <m.felsch@...gutronix.de>
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, peppe.cavallaro@...com,
        alexandre.torgue@...s.st.com, joabreu@...opsys.com,
        mcoquelin.stm32@...il.com, devicetree@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net-next v4 1/3] dt-bindings: net: snps,dwmac: add
 phy-supply support

On Fri, Jul 21, 2023 at 01:03:43PM +0200, Marco Felsch wrote:
> Document the common phy-supply property to be able to specify a phy
> regulator.

What common property? I don't see any such property in 
ethernet-controller.yaml.

> 
> Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
> Changelog:
> v4:
> - no changes
> v3:
> - no changes
> v2
> - add ack-by
> 
>  Documentation/devicetree/bindings/net/snps,dwmac.yaml | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> index ddf9522a5dc23..847ecb82b37ee 100644
> --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> @@ -160,6 +160,9 @@ properties:
>        can be passive (no SW requirement), and requires that the MAC operate
>        in a different mode than the PHY in order to function.
>  
> +  phy-supply:
> +    description: PHY regulator

Is this for an serdes, sgmii, etc. type phy or ethernet phy? Either way, 
this property belongs in the PHY's node because it is the PHY that has 
supply connection. I'm guessing you put this here for the latter case 
because ethernet PHYs on MDIO are "discoverable" except for the small 
problem that powering them on is not discoverable. 

Rob