[Letux-kernel] [PATCH] usb: musb: fix enumeration after resume

Bin Liu b-liu at ti.com
Wed Feb 7 21:32:20 CET 2018


On Tue, Feb 06, 2018 at 10:47:25AM -0800, Tony Lindgren wrote:
> * Andreas Kemnade <andreas at kemnade.info> [180127 08:34]:
> > On dm3730 there are enumeration problems after resume.
> > Investigation led to the cause that the MUSB_POWER_SOFTCONN
> > bit is not set. If it was set before suspend (because it
> > was enabled via musb_pullup()), it is set in
> > musb_restore_context() so the pullup is enabled. But then
> > musb_start() is called which overwrites MUSB_POWER and
> > therefore disables MUSB_POWER_SOFTCONN, so no pullup is
> > enabled and the device is not enumerated.
> 
> I just gave this patch a quick try and things seem to behave
> for me from PM point of view:
> 
> Tested-by: Tony Lindgren <tony at atomide.com>

Thanks for testing it.

Regards,
-Bin.


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