Re: help with f_loopback

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On Tue, Dec 18, 2012 at 10:28:18AM -0600, ricardo garcia wrote:
> > try with our test application just to rule out bugs on the host side.
> > Also, which controller are you using ? Why are you sticking to such an
> > old kernel ? Can you try with current stable release, v3.7 ?

That is a good start :)

> > v3.0 was release Jun 2011, that's really old. If you can't upgrade your
> > kernel, you will have to ask for support from whoever gave you such old
> > release.
> >
> > --
> > balbi
> 
> 
> How do I find the controller that im using? this is an embedded system...
> Linux 3.0.17 #8 PREEMPT Tue May 15 08:00:00 MST 2012 armv6l GNU/Linux
> i will try to compile a 3.7 kernel

v3.0 is before udc-class got merged. There are two ways:
- look for the "manufacturer string". This should be something like
  "usb 1-1: Manufacturer: Linux 3.7.0+ with dummy_udc"
  The part after "with" should tell you the name of the udc.
- check your .config which UDC driver has been enabled. Back in v3.0 it was
  only possible to enable one.
- a third way might be to enable debug and look which drivers are loaded after
  "modprobe g_zero" and what output you get. Sometimes it prints the driver
  here or there.

Sebastian
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