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

Krishna Kurapati PSSNV
2025-10-27T08:32:04Z

On 10/27/2025 1:02 PM, Biju Das wrote:
>
>
>> -----Original Message-----
>> From: Krishna Kurapati <krishna.kurapati@oss.qualcomm.com>
>> Sent: 27 October 2025 07:28
> .kernel.org; linux-kernel@vger.kernel.org; Krishna
>> Kurapati <krishna.kurapati@oss.qualcomm.com>
>> 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@oss.qualcomm.com>
>> ---
>> 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,