Re: Continuous Interrupt Problem

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Hello Siddharth,

On Thu, Jun 14, 2012 at 2:11 PM, siddharth saxena
<siddharthsaxena1989@xxxxxxxxx> wrote:
> 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.

What is the default state of your irq gpio pin?  Is it pulled high or low?
What is the interrupt asset conditon from your TSC(Active high/low or
Edge triggered)?

Thanks,
Arun

>
>
>
>
> On Thu, Jun 14, 2012 at 12:21 PM, Sarbojit Ganguly
> <unixman.linuxboy@xxxxxxxxx> 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@xxxxxxxxx> wrote:
>> > Hello Siddharth,
>> >
>> > On Thu, Jun 14, 2012 at 10:34 AM, siddharth saxena
>> > <siddharthsaxena1989@xxxxxxxxx> 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@xxxxxxxxxxxxxxxxx
>> >> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>> >>
>> >
>> > _______________________________________________
>> > Kernelnewbies mailing list
>> > Kernelnewbies@xxxxxxxxxxxxxxxxx
>> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>>
>>
>>
>> --
>> Regards,
>> Sarbojit
>
>
>
>
> --
> Regards
> Siddharth Saxena
>

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