Hi Heikki, Thanks for the feedback. > Subject: Re: [PATCH 4/9] usb: gadget: udc: renesas_usb3: use extcon > framework to receive connect/disconnect > > On Wed, Mar 06, 2019 at 09:07:21AM +0000, Biju Das wrote: > > RZ/G2E cat874 board is capable of detecting cable connect and > > disconnect events. Add support for renesas_usb3 to receive connect and > > disconnect notification using extcon framework. > > I think you will need the series from Yu Chen [1], but once we have that, you > can do this with USB role class instead of relying on extcon, and that is what > you need to do. > > There is a reason why we need to use a dedicated class with the USB role > switching instead of relying on extcon. We actually originally planned on using > extcon with the USB role switches, but the extcon maintainers refused some > the USB mux drivers. The problem from extcon perspective is that the > consumer/supplier roles seem to be inverted in some cases. USB role switch > can simply be too many things - discrete mux, integrated mux (like in your > case) or something like a dual role capable USB controller could simply > represent one. > > On the other hand, using a dedicated API and class now feel like a much > better idea in general compared to a multipurpose thing like extcon. > > [1] https://lkml.org/lkml/2019/3/2/42 Ok. Will use usb role class instead of extcon . Regards, Biju
