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Date:	Thu, 6 Mar 2014 09:34:40 +0000
From:	Peter Chen <>
To:	Jagdish Gedia <>
CC:	"" <>,
	"" <>
Subject: RE: USB remote wakeup through gpio interrupt

> Hi Peter,
> My usb device is not capable of giving interrupt when it finishes using
> usb. So i dont have any idea where can i call pm_runtime_put for my usb
> device?
> the other thing is that, earlier you have told, waking up usb device
> through interrupt is same as writing "on" to ../power/control , but i
> think writing "on" to ../power/control will disable the autosuspend for
> usb device in future, but i want autosuspend to be enabled for my usb
> device always. Will using pm_runtime_get and pm_runtime_put cause the
> disable of autosuspend for usb device?

It is not related to autosuspend. Make sure you use above two APIs in pair.
Of cos, writing "on" to "../power/control" will disable autosuspend.


> Thanks,
> Jagdish Gediya
> On Thu, Mar 6, 2014 at 2:53 PM, Jagdish Gedia <> wrote:
> > Hi Alan,
> >
> > As you have told, i have executed pm_request_resume() function from my
> > interrupt handler, and it is waking up my USB device. I have
> > implemented all this functionality in class driver(cdc-acm.c).
> > but what is happening is after 2-3 times, ausosuspend is getting
> > disable for my device. I want autosuspend to be enabled for usb device
> > forever. Do pm_request_resume function causes this behavior?
> >
> >
> >
> > Thanks,
> > Jagdish Gediya

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