Re: OMAP3 & USB NFS root

[Tomi Valkeinen <tomi.valkeinen@ti.com>]

On Mon, 2011-02-14 at 08:02 -0600, Balbi, Felipe wrote:
> On Mon, Feb 14, 2011 at 04:00:39PM +0200, Tomi Valkeinen wrote:
> > On Mon, 2011-02-14 at 07:48 -0600, Balbi, Felipe wrote:
> > > On Mon, Feb 14, 2011 at 03:46:46PM +0200, Tomi Valkeinen wrote:
> > > > Hi,
> > > > 
> > > > I've been trying to get USB ethernet gadget driver working so that I can
> > > > use NFS root to boot my board (overo or beagle).
> > > > 
> > > > With 2.6.37 I did get it work, but only after I enabled host mode and
> > > > set the driver mode to OTG. With just USB peripheral mode it didn't seem
> > > > to work.
> > > > 
> > > > With 2.6.38-rc4 I don't seem to get it working at all, not matter what
> > > > config options I have tried.
> > > > 
> > > > And when I say "not working" I mean I don't get any output about USB
> > > > when the kernel is waiting for the rootfs. Not even if I unplug and plug
> > > > the USB cable. And the PC's kernel messages don't show anything when the
> > > > board's kernel boots up.
> > > > 
> > > > I've attached the configs I have tried.
> > > 
> > > try this patch:
> > > 
> > > commit d5f42190e7cf11b20face63ee96f26c7d2067b63
> > > Author: Ming Lei <tom.leiming@gmail.com>
> > > Date:   Wed Jan 5 22:03:21 2011 +0800
> > > 
> > >     arm: omap4: panda: remove usb_nop_xceiv_register(v1)
> > >     
> > >     Panda uses both twl6030 otg phy(vbus, id) and internal
> > >     phy(data lines, DP/DM), so removes usb_nop_xceiv_register to make
> > >     twl6030 otg driver working since current otg code only supports
> > >     one global transceiver. Otherwise, musb doesn't work without
> > >     the remove.
> > 
> > I don't use Panda (yet, damn fedex...), but Overo or Beagle.
> 
> ah, ok. So it's another problem. I don't have beagle, but I have an old
> overo here. Will try tomorrow to see what's going on. Thanks for the
> report.

Did you get a chance to try this? Or any suggestions what I could try? I
could of course try to bisect it, but that's quite laborious as I have
to store the kernel into an mmc to be able to use it.

 Tomi