On Sun, 4 Feb 2018 11:55:02 +0100 Michael Nazzareno Trimarchi <michael@xxxxxxxxxxxxxxxxxxxx> wrote: > Hi Andreas > > On Sun, Feb 4, 2018 at 11:50 AM, Andreas Kemnade <andreas@xxxxxxxxxxxx> wrote: > > Hi, > > > > On Sun, 4 Feb 2018 09:43:45 +0100 > > Michael Nazzareno Trimarchi <michael@xxxxxxxxxxxxxxxxxxxx> wrote: > > > >> Hi Andreas > >> > >> On Sun, Feb 4, 2018 at 9:38 AM, Andreas Kemnade <andreas@xxxxxxxxxxxx> wrote: > >> > On Sun, 4 Feb 2018 00:10:50 +0100 > >> > Michael Nazzareno Trimarchi <michael@xxxxxxxxxxxxxxxxxxxx> wrote: > >> > > >> >> Hi > >> >> > >> >> On Sun, Feb 4, 2018 at 12:03 AM, Andreas Kemnade <andreas@xxxxxxxxxxxx> wrote: > >> >> > Hi, > >> >> > > >> >> > I booted a 4.15 kernel without udev and loaded modules piece by piece to analyze > >> >> > pm problems. modprobe ehci-omap increases current by around 35mA and > >> >> > also rmmod ehci-omap does not let it go down at all. > >> >> > > >> >> > I expect that removing hardware does the same thing > >> > nonsense sentence from me, was to tired. I would expect that removing the modules > >> > properly powers down the device. > >> >> > > >> >> > Also suspend current increases by around 15mA if that module is loaded. > >> >> > I tested with having everything disabled which is attached to that usb bus. > >> >> > > >> >> > >> >> Do you have an LTE connected to the usb? > >> >> > >> > Yes, there is a UMTS modem attached, but it was off during the tests. > >> > It did not enumerate on the modem. > >> > > >> > >> Just to understand if the suspend current drop was connected to the > >> suspend of lte modem on your side. > >> So you don't have anything connected on usb bus? > >> > > Suspend current is increased when the ehci-omap module is loaded > > in comparison to the state. I tested with the modem disabled, so there > > is nothing on the bus. Increased suspend current is one thing, > > current_before_modprobe_ehci_omap != current_after_rmmod_ehci_omap. > > > > I am testing with init=some_testscript.sh, so no userspace > > is doing strange things. No module autoload or something. > > Ok, there is some heavy EBCAK involved. I just did an echo rmmod without a real rmmod. But the suspend thing is still valid. Sorry for the confusion. To avoid further confusion I have uploaded these two scripts I have given to the kernel. http://misc.andi.de1.cc/measure4.sh output from that: no modules: cur: 61047 delta: 61047 before: 423462 after: 421326 average 25632 uA over 300 seconds cur: 60333 delta: -714 +ehci-omap cur: 93712 delta: 33379 -ehci-omap cur: 60511 delta: -33201 before: 420792 after: 418656 average 25632 uA over 300 seconds http://misc.andi.de1.cc/measure5.sh output from that: no modules: cur: 61225 delta: 61225 before: 427734 after: 425598 average 25717 uA over 299 seconds cur: 59797 delta: -1428 +ehci-omap cur: 93712 delta: 33915 before: 425242 after: 421860 average 40719 uA over 299 seconds The 40mA is too high. We have had measurements below 30mA even with modem enabled with some pre-dt setup (Kernel 3.7) Regards, Andreas
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