Re: [PATCH 1/2] dt-bindings: phy: add vbus-supply optional property to phy-stm32-usbphyc

[Amelie DELAUNAY]

Hi Rob,

On 3/26/21 1:28 AM, Rob Herring wrote:
> On Wed, Mar 17, 2021 at 05:09:53PM +0100, Amelie Delaunay wrote:
> > This patch adds vbus-supply optional property to phy sub-nodes.
> > A regulator for USB VBUS may be needed for host mode.
> >
> > Signed-off-by: Amelie Delaunay <amelie.delaunay@xxxxxxxxxxx>
> > ---
> >   Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.yaml | 3 +++
> >   1 file changed, 3 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.yaml b/Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.yaml
> > index 018cc1246ee1..ad2378c30334 100644
> > --- a/Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.yaml
> > +++ b/Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.yaml
> > @@ -71,6 +71,9 @@ patternProperties:
> >         phy-supply:
> >           description: regulator providing 3V3 power supply to the PHY.
> >   
> > +      vbus-supply:
> > +        description: regulator providing 5V Vbus to the USB connector.
>
> Unless Vbus is powering the phy, then this only belongs in the USB
> connector node.

Do you mean I should declare a connector node as a child of the phy node 
and get the vbus-supply property from this connector node ?

In case of a on-board autonomous hub between the phy and the connectors, 
so no driver to drive it nor to get the vbus-supply property to provide 
VBUS to the hub, then the connectors, how to use connector ?

[USB controller]===[USB PHY]===[(USB HUB)]===|> USB A connector
                              /              |> USB A connector
                            VBUS             |> USB A connector
                                             |> USB A connector

Please advise.

Regards,
Amelie

> > +
> >         "#phy-cells":
> >           enum: [ 0x0, 0x1 ]
> >   
> > --
> > 2.17.1