Re: [net-next,PATCH v2 1/5] dt-bindings: net: add phy-supply property for stm32

[Christophe ROULLIER <christophe.roullier@foss.st.com>]

Le 12/08/2026 à 21:58, Rob Herring a écrit :
> On Wed, Aug 12, 2026 at 11:11:18AM +0200, Christophe Roullier wrote:
>> Phandle to a regulator that provides power to the PHY. This
>> regulator will be managed during the PHY power on/off sequence.
>>
>> Signed-off-by: Christophe Roullier <christophe.roullier@foss.st.com>
>> ---
>>   Documentation/devicetree/bindings/net/stm32-dwmac.yaml | 3 +++
>>   1 file changed, 3 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/net/stm32-dwmac.yaml b/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
>> index 987254900d0da..0c7eb1ccadd47 100644
>> --- a/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
>> +++ b/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
>> @@ -99,6 +99,9 @@ properties:
>>         encompases the glue register, the offset of the control register and
>>         the mask to set bitfield in control register
>>   
>> +  phy-supply:
>> +    description: PHY regulator
> Which phy? There can be multiple for ethernet. In any case, doesn't
> really matter because either is wrong. The supply(ies) for a device go
> in that device's DT node. This node is not a PHY.
>
> Rob

Hi Rob,

Ok I will update my description with :   "Regulator that powers the 
Ethernet PHY."

To manage this regulator on Ethernet glue, I based my work on the 
examples of :

   - allwinner,sun4i,

   - allwinner,sun7i

   - allwinner,sun8i

   - fsl,fec

   - rockchip-dwmac

   - rockchip,emac

For me it is normal that PHY Ethernet regulator is managed by MAC glue 
because it is mandatory to power ON Ethernet PHY chip BEFORE MDIO scan.

Let me know if that works for you

Regards,

Christophe.