Re: [PATCH v2 1/3] dt-bindings: usb: usb-xhci: Add bindings for usb-skip-phy-init property

[Sandeep Maheswaram]

On 11/13/2021 4:17 AM, Rob Herring wrote:
> On Mon, Nov 08, 2021 at 12:11:48PM +0530, Sandeep Maheswaram wrote:
> > Adding bindings for usb-skip-phy-init property.
> > Runtime suspend of phy drivers was failing from DWC3 driver as
> > runtime usage value is 2 because the phy is initialized from
> > DWC3 core and HCD core.
> > Some controllers like DWC3 and CDNS3 manage phy in their core drivers.
> > This property can be set to avoid phy initialization in HCD core.
> You already know if you have a DWC3 and CDNS3 controller, so you don't
> need more data in DT.

We don't have a device tree node for xhci platform device and create 
xhci platform device from dwc3/host.c

So we want to pass this property to check in xhci-plat.c and skip phy 
initialization.

> > Signed-off-by: Sandeep Maheswaram <quic_c_sanm@xxxxxxxxxxx>
> > ---
> >   Documentation/devicetree/bindings/usb/usb-xhci.yaml | 4 ++++
> >   1 file changed, 4 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/usb/usb-xhci.yaml b/Documentation/devicetree/bindings/usb/usb-xhci.yaml
> > index 965f87f..a64d29f 100644
> > --- a/Documentation/devicetree/bindings/usb/usb-xhci.yaml
> > +++ b/Documentation/devicetree/bindings/usb/usb-xhci.yaml
> > @@ -25,6 +25,10 @@ properties:
> >       description: Set if the controller has broken port disable mechanism
> >       type: boolean
> >   
> > +  usb-skip-phy-init:
> > +    description: Set if the phy initialization is managed by controller
> > +    type: boolean
> > +
> >     imod-interval-ns:
> >       description: Interrupt moderation interval
> >       default: 5000
> > --
> > 2.7.4