Re: [RFC 1/8] dt-bindings: usb: qcom,dwc3: Add bindings to enable runtime

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On 11/3/2023 12:10 AM, Caleb Connolly wrote:
Hi Caleb,

   There are two types of platforms, some use extcon and some use role-switch to deliver vbus/id notifications. Extcon targets already have this qscratch modifications present today in vbus and id handlers. But for role-switch based targets we don't have any way to get this notification to dwc3-qcom. In this implementation, I wanted to get those notications from core to glue and for this we implenented vendor hooks.

The property added has been used to do two things:

1. Register glue's vendor hooks to core driver
2. Do runtime_allow for glue (and by default for core as the dt is not flattened)

In case of extcon, we don't want to register vendor hooks as notifications are not necessary.

Could it just be enabled when role_switch is present then?


So we would register vendor hooks when usb-role-switch is present but don't do runtime allow, and leave that option to user space right ?
I think it would work and we can do away with the binding completely.

Will wait for comments from other folks as well on this approach.

Thanks for the review,
Krishna,



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