linux-kernel - Re: USB remote wakeup through gpio interrupt

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Message-ID: <CAOAoqGtiNe9QE+Bu3inva51qp1STKNOsEDG9b6Q7JBh7atQQrA@mail.gmail.com>
Date:	Thu, 6 Mar 2014 14:58:52 +0530
From:	Jagdish Gedia <jvgediya@...il.com>
To:	Peter Chen <Peter.Chen@...escale.com>
Cc:	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
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?

Thanks,
Jagdish Gediya

On Thu, Mar 6, 2014 at 2:53 PM, Jagdish Gedia <jvgediya@...il.com> 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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