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. Regards, Andreas -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
