Messages in this thread | | | Date | Fri, 16 Sep 2011 17:22:32 -0400 (EDT) | From | Alan Stern <> | Subject | Re: [PATCH] usb: add new usb gadget for ACM and mass storage |
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On Fri, 16 Sep 2011, Sebastian Andrzej Siewior wrote:
> * Greg KH | 2011-09-09 11:43:54 [-0700]: > > >So we can expect more patches like this adding all of the possible > >permutations of the different gadget devices? > > > >If so, ick, I thought that the work that was done was to prevent this > >from happening, oh well :( > > Would it be possible to come up with a gadget-hub driver which can have > multiple gadget attached? This should get rid of this kind of gadget > drivers, right?
Instead of implementing a hub, it might be possible to redo the composite driver in such a way that the individual function drivers are added as separate modules at runtime, rather than all bound together at compile time.
The details would be tricky, but I think it could be done. One important point is that somehow you have to inform the composite core when all the function drivers have been loaded and initialized -- otherwise there's no way to tell when it's safe to enable the pull-ups and connect to the host.
Alan Stern
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