Re: [PATCH v5 1/2] dt-bindings: usb: ti,hd3ss3220: Add support for VBUS based on ID state

[Krishna Kurapati PSSNV]

On 10/27/2025 1:02 PM, Biju Das wrote:
> > -----Original Message-----
> > From: Krishna Kurapati <krishna.kurapati@xxxxxxxxxxxxxxxx>
> > Sent: 27 October 2025 07:28
> .kernel.org; linux-kernel@xxxxxxxxxxxxxxx; Krishna
> > Kurapati <krishna.kurapati@xxxxxxxxxxxxxxxx>
> > Subject: [PATCH v5 1/2] dt-bindings: usb: ti,hd3ss3220: Add support for VBUS based on ID state
> >
> > Update the bindings to support reading ID state and VBUS, as per the
> > HD3SS3220 data sheet. The ID pin is kept high if VBUS is not at VSafe0V and asserted low once VBUS is
> > at VSafe0V, enforcing the Type-C requirement that VBUS must be at VSafe0V before re-enabling VBUS.
> >
> > Add id-gpios property to describe the input gpio for USB ID pin.
> >
> > Signed-off-by: Krishna Kurapati <krishna.kurapati@xxxxxxxxxxxxxxxx>
> > ---
> >   Documentation/devicetree/bindings/usb/ti,hd3ss3220.yaml | 8 ++++++++
> >   1 file changed, 8 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/usb/ti,hd3ss3220.yaml
> > b/Documentation/devicetree/bindings/usb/ti,hd3ss3220.yaml
> > index bec1c8047bc0..06099e93c6c3 100644
> > --- a/Documentation/devicetree/bindings/usb/ti,hd3ss3220.yaml
> > +++ b/Documentation/devicetree/bindings/usb/ti,hd3ss3220.yaml
> > @@ -25,6 +25,14 @@ properties:
> >     interrupts:
> >       maxItems: 1
> >
> > +  id-gpios:
> > +    description:
> > +      An input gpio for USB ID pin. Upon detecting a UFP device, HD3SS3220
> > +      will keep ID pin high if VBUS is not at VSafe0V. Once VBUS is at VSafe0V,
> > +      the HD3SS3220 will assert ID pin low. This is done to enforce Type-C
> > +      requirement that VBUS must be at VSafe0V before re-enabling VBUS.
> > +    maxItems: 1
> > +
>
> Maybe to help DT users, add an example for this use case??
Hi Biju,

 Adding GPIO to dt is a generic thing. Also this is an optional 
proprety. Can we skip adding an example.

Regards,
Krishna,