Re: [PATCH v0] gpio_keys: fix gpio key driver to proper support GIC interrupt

[Feng Kan <fkan@xxxxxxx>]

On Thu, Jun 4, 2015 at 10:23 AM, Dmitry Torokhov
<dmitry.torokhov@xxxxxxxxx> wrote:
> Hi Y,
> On Thu, Jun 04, 2015 at 02:25:12PM +0700, Y Vo wrote:
>> GIC is designed to support two of trigger mechanisms - active level
>> high or edge rising. But in the gpio_keys driver, it tries to use both
>> edge rising and edge falling trigger. This patch fixes the gpio_keys
>> driver to request only the edge rising event when failed to configure the
>> interrupt.
>
> How do we get notified of button release if we only get interrupt on
> rising edge?

On the arm gic, only the rising edge is supported. So key press can
only be defined
as rising edge and no key release.
>
> Thanks.
>
> --
> Dmitry
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