Re: [RFC] GADGET : allow to build multi udc

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On Fri, 3 Sep 2010, [utf-8] MichaÅ? Nazarewicz wrote:

> >> I've noticed that you've added priv.  I would also add some kind of name or
> >> (name, id) pair.  Both of those could be a way to allow several UDCs to work.
> >> usb_gadget_register() (or usb_gadget_probe() in next) would take the first
> >> available UDC but usb_gadget_probe_named() could be added which would allow
> >> to specify UDC by name.
> 
> On Fri, 03 Sep 2010 05:49:25 +0200, David Brownell <david-b@xxxxxxxxxxx> wrote:
> > NAK let's just not go there.  We want gadget drivers
> > to be hardware-neutral, not hardware-dependent.
> 
> I was thinking more along the way of gadgets having a module parameter
> like udc=<name>.  With composite it would be like 5 lines of code to
> implement and user space would be able to specify that the gadget it is
> now loading should go with this UDC.
> 
> Just my thoughts.

Why would the user want to tell the gadget driver which UDC to bind to?  
There can be only one UDC active at any time.

Alan Stern

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