[PATCH 0/6] vf610: Add USB support

Stefan Agner stefan at agner.ch
Sat Jul 26 05:24:10 PDT 2014

Am 2014-07-22 02:13, schrieb Peter Chen:
> On Fri, Jul 18, 2014 at 07:01:36PM +0200, Stefan Agner wrote:
>> This patchset adds USB support for Vybrid VF610 SoC. It extends the
>> clock framework to support the USB PHY cocks, extends the device
>> tree files and adds support for the non-core registers in the
>> usbmisc_imx driver.
>> This patchset needs the eSDHC length fix available in Shawn's
>> for-next branch.
> Why it is related to USB patchset?

The eSDHC registers are just in front of the USB registers. Due to the
wrong length, the two register areas overlapped, hence the second driver
(and I think it was USB which was loaded second) could not probe

>> The whole patchset proved to be working on a Colibri VF61. The
>> first USB controller runs in peripheral mode. I could successfully
>> use RNDIS, however with some stability issues: Suddenly the other
>> side was not reachable anymore and the interface needed to brought
>> down and back up again. I'm still investigating this.
> Do you use ubuntu as host distribution? I find ubuntu will lost the
> first connection for usb-ethernet-gadget(usb0) as network interface,
> but once you re-config usb0 again (ifconfig usb0 ip up), it should work
> and will not lose connection any more.

I use a Angstrom build, an OpenEmbedded distribution. I restarted the
link using ip link set dev usb0 up/down, this brought the link back in a
pingable state, however even afterwards after some seconds of iperf, the
link hanged again...


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