On Tue, Aug 19, 2014 at 10:56:58AM -0400, Alan Stern wrote:
> On Tue, 19 Aug 2014, Peter Chen wrote:
>
> > > > --- a/include/linux/usb/gadget.h
> > > > +++ b/include/linux/usb/gadget.h
> > > > @@ -873,12 +873,39 @@ struct usb_gadget_driver {
> > > > void (*disconnect)(struct usb_gadget *);
> > > > void (*suspend)(struct usb_gadget *);
> > > > void (*resume)(struct usb_gadget *);
> > > > + int (*connect)(struct usb_gadget *, bool
> > > > connect);
> > > >
> > > > /* FIXME support safe rmmod */
> > > > struct device_driver driver;
> > > > };
> > >
> > > This looks strange. Why do you have the "bool connect" parameter?
> >
> > How can I tell the gadget driver to pull down dp after vbus is off?
> >
> > > There's already a disconnect callback.
> >
> > Maybe I need to use other name rather than connect, the .disconnect
> > sometimes
> > is called at bus reset handler so I can't put dp control in it.
>
> We could fix that. Right now there are only about four files that
> define a usb_gadget_driver structure. All you have to do is make sure
> they each contain a reset handler.
>
Yes, it is easy to add reset handler, I am waiting Felipe's comment,
if he is no comments, I will send a patchset for adding reset handler first.
--
Best Regards,
Peter Chen
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