[PATCH 12/15] dt-bindings: mdio: add phy-supply property to ethernet phy node

Florian Fainelli f.fainelli at gmail.com
Tue Jun 23 15:39:43 EDT 2020

On 6/22/20 2:37 AM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski at baylibre.com>
> The phy-supply property is often added to MAC nodes but this is wrong
> conceptually. These supplies should be part of the PHY node on the
> MDIO bus. Add phy-supply property at PHY level to mdio.yaml.
> Signed-off-by: Bartosz Golaszewski <bgolaszewski at baylibre.com>
> ---
>  Documentation/devicetree/bindings/net/mdio.yaml | 4 ++++
>  1 file changed, 4 insertions(+)
> diff --git a/Documentation/devicetree/bindings/net/mdio.yaml b/Documentation/devicetree/bindings/net/mdio.yaml
> index d6a3bf8550eb..9c10012c2093 100644
> --- a/Documentation/devicetree/bindings/net/mdio.yaml
> +++ b/Documentation/devicetree/bindings/net/mdio.yaml
> @@ -90,6 +90,10 @@ patternProperties:
>            Delay after the reset was deasserted in microseconds. If
>            this property is missing the delay will be skipped.
> +      phy-supply:
> +        description:
> +          Phandle to the regulator that provides the supply voltage to the PHY.

I do not see how you can come up with a generic name here, there could
be PHYs supporting different voltages (3.3V, 1.8V, 1.5V) depending on
their operation mode/strapping, there can also be different parts of the
PHY being powered by different regulators, the analog part could be on
an always-on island such that Wake-on-LAN from the PHY could be done,
and the digital part could be on a complete different island.

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