Hi, On Tue, 6 Feb 2018 10:47:25 -0800 Tony Lindgren <tony@xxxxxxxxxxx> wrote: > * Andreas Kemnade <andreas@xxxxxxxxxxxx> [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@xxxxxxxxxxx> > > Unrelated to this patch, I also noticed that we now somehow > higher idle power consumption initially when musb modules are > loaded. It used to idle after that but now to get things to > idle I had to plug and unplug a USB device once to the musb > port. > Hmm, I have seen this effect with some earlier kernels but not with 4.15. My observation is that current consumption went down again after a modprobe g_ether and ifconfig usb0 up I was loading modules piece by piece and waited 10s after each and then measured. Regards, Andreas
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