[PATCH v2 08/17] gpio: locomo: implement per-pin irq handling

Dmitry Eremin-Solenikov
2015-05-06T16:42:33Z

2015-05-06 17:15 GMT+03:00 Linus Walleij <linus.walleij@linaro.org>:
> On Tue, Apr 28, 2015 at 1:55 AM, Dmitry Eremin-Solenikov
> <dbaryshkov@gmail.com> wrote:
>
>> LoCoMo has a possibility to generate per-GPIO edge irqs. Support for
>> that was there in old locomo driver, got 'cleaned up' during old driver
>> IRQ cascading cleanup and is now reimplemented. It is expected that
>> SL-5500 (collie) will use locomo gpio irqs for mmc detection irq.
>>
>> Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
>
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Thanks for review of the patches.

> Assume this will also go through MFD.
>
>> + irq_set_chained_handler(lg->irq, NULL);
>> + irq_set_handler_data(lg->irq, NULL);
>
> Why is this needed? If the GPIOLIB_IRQCHIP code in
> gpiolib.c is not doing this then maybe it's the core code that
> needs fixing rather than having this in the driver.

I have skimmed through the rest of drivers using
gpiochip_set_chained_irqchip(). Indeed none of the drivers NULL
the chained handled and handler data. However I couldn't locate
the code where they would be cleared.

Should I still send the patch fixing the GPIOLIB_IRQCHIP?

>
> Yours,
> Linus Walleij

--
With best wishes
Dmitry