Continuous Interrupt Problem

[siddharth saxena]

Hi Arun

I tried changing the flag to IRQF_TRIGGER_HIGH but then device is behaving
abnormally(Hangs and is dead after some time).
Flooding interrupts still observed. Problem not solved.

I want to know, are we supposed to change interrupt pin status or it is
done automatically when we return IRQ_HANDLED.




On Thu, Jun 14, 2012 at 12:21 PM, Sarbojit Ganguly <
unixman.linuxboy at gmail.com> wrote:

> Hi Arun,
>
> While I agree to your pointers but he is facing the problem of
> "interrupt floods" even before he touches.
> IMHO the culprit could be the flag.
>
> On 14 June 2012 12:01, Arun KS <getarunks at gmail.com> wrote:
> > Hello Siddharth,
> >
> > On Thu, Jun 14, 2012 at 10:34 AM, siddharth saxena
> > <siddharthsaxena1989 at gmail.com> wrote:
> >> Hi all
> >>
> >> I need help with an issue.
> >> I have written a touch driver for a device and used the flag
> >> IRQF_TRIGGER_LOW to request irq.
> >> Now, when I boot the device, the touch interrupts are coming already
> without
> >> touching the screen.
> >> Continuous interrupts are occurring without any touch.
> >
> > Probably the default state of the gpio pin(which you configured as
> > irq) is low. Check your HW schematic.
> >
> > TSC should have interrupt polarity(Active High/Low), which you have to
> > choose depending on your schematic while initiallizing the TSC.
> > Also different modes like assert interrupt when finger moving, when
> > finger touch, or assert periodically.
> >
> > Hope these pointer will help you.
> >
> > Thanks,
> > Arun
> >
> >>
> >>
> >>
> >> --
> >> Regards
> >> Siddharth Saxena
> >>
> >>
> >> _______________________________________________
> >> Kernelnewbies mailing list
> >> Kernelnewbies at kernelnewbies.org
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> >>
> >
> > _______________________________________________
> > Kernelnewbies mailing list
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>
>
>
> --
> Regards,
> Sarbojit
>



-- 
Regards
Siddharth Saxena
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