[Letux-kernel] gadget after suspend

[Andreas Kemnade]

On Mon, 15 Jan 2018 14:01:16 +0100
"H. Nikolaus Schaller" <hns at goldelico.com> wrote:

> Hi,
> 
> > Am 15.01.2018 um 07:00 schrieb Andreas Kemnade <andreas at kemnade.info>:
> > 
> > Hi,
> > 
> > In earlier times, it was helpful to revert this patch to have a
> > working gadget after suspend. 
> > 
> > "PM / Runtime: Don't allow to suspend a device with an active child"
> > 
> >    This reverts commit a8636c89648ab12e59d8f3aa667ec76fc96fd643.
> > 
> > Now that code changed and I have to find out a better way. 
> > ifconfig usb0 down ; ifconfig usb0 up from userspace cures the problem.
> > 
> > I will of course do more research.  
> 
> Ok.
> 
> Another thing I usually observe is that this happens if the USB
> cable is plugged in during boot (it seems not depend on if the
> USB plugin powers on the device - its suffices to reboot with
> USB cable still connected).

connected during which boot phase? During u-boot actions or when the
kernel boots  I have not seen this kind of problem for
quite some time.
> 
> Then I also have to ifdown usb0; ifup usb0 to make it work.
> 
ifdown usb0/ifup usb0 does rmmod/modprobe at your setup? 
That is why I was doing just ifconfig down/up

> Exactly the same networking setup works on AM335x so this allows
> to isolate that issue to musb and twl4030-phy.
> 
Why? gta04 = musb + omap2430 glue + twl4030-phy
am335x = musb + am35xx glue + ?

Regards,
Andreas
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