Re: ad714x driver help and possible bug

[Jean-Francois Dagenais]

On Apr 29, 2011, at 10:58, Michael Hennerich wrote:

> On 04/29/2011 04:52 PM, Michael Hennerich wrote:
>> On 04/29/2011 11:55 AM, Jonathan Cameron wrote:
>>> Cc'd input, and analog devices driver list...
>>> 
>>> On 04/28/11 19:17, Jean-Francois Dagenais wrote:
>>> 
>>> 
>>>> I also had to change the request_threaded_irq flags to specify
>>>> IRQF_ONESHOT so the kernel keeps the interrupt masked while we are
>>>> running ad714x_interrupt_thread(). Otherwise we were getting storms
>>>> of interrupts each time only one was requested. I am wondering if
>>>> this should be pulled back to the mainline kernel?
>>>> 
>>>> Thanks for pointers and clues!
>>>> 
>>>> 
>> I assume this is due to the fact that the interrupt on the host is
>> level sensitive.
>> In this case you need to use the IRQF_ONESHOT flag.
>> The unmodified driver requests the IRQ as IRQF_TRIGGER_FALLING, so
>> this is not necessary.
I succeeded in making the ISR occur only once per real interrupt, the problem I explained earlier remains.
>> 
>> To my knowledge we regularly test the driver with the sliders, wheels
>> and buttons found on the
>> official evaluation board, and so far we haven't found oddities.
>> For an example platform file see: arch/blackfin/mach-bf537/boards/stamp.c
>> From top of my head I don't know whether we're testing with the SPI or
>> I2C interface.
>> 
>> http://wiki.analog.com/software/driver/linux/ad714x
>> 
> -- 
> 
> Greetings,
> Michael
> 
> --
> Analog Devices GmbH      Wilhelm-Wagenfeld-Str. 6      80807 Muenchen
> Sitz der Gesellschaft: Muenchen; Registergericht: Muenchen HRB 40368;
> Geschaeftsfuehrer:Dr.Carsten Suckrow, Thomas Wessel, William A. Martin,
> Margaret Seif
> 
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/