On Sun, 4 Feb 2018 09:43:45 +0100
Michael Nazzareno Trimarchi <mich...@amarulasolutions.com> wrote:
> Hi Andreas
> On Sun, Feb 4, 2018 at 9:38 AM, Andreas Kemnade <andr...@kemnade.info> wrote:
> > On Sun, 4 Feb 2018 00:10:50 +0100
> > Michael Nazzareno Trimarchi <mich...@amarulasolutions.com> wrote:
> >> Hi
> >> On Sun, Feb 4, 2018 at 12:03 AM, Andreas Kemnade <andr...@kemnade.info>
> >> 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.
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html