Re: [PATCH 1/2] Input: gpio_keys - Also send release events for ABS codes

[Paul Cercueil]

On 03/11/2016 17:21, Dmitry Torokhov wrote:
> On Tue, Nov 01, 2016 at 11:25:03AM +0100, Paul Cercueil wrote:
> > Right now, the gpio-keys driver is mostly used with EV_KEY event types.
> > However, this driver (and its devicetree bindings) support specifying
> > a different input type, like EV_ABS, even though this doesn't work in
> > practice: "key pressed" events are correctly received and treated, but
> > "key released" are silently ignored.
> >
> > With this commit, keys configured as EV_ABS will inject an event with
> > the value 0 when released.
> No, this will break setups like this:
>
> gpio0 - ABS_X - 0
> gpio1 - ABS_X - 1
> gpio2 - ABS_X - 2
> ...
> gpio7 - ABS_X - 7
>
> - something like a slider built on top of gpios.

So what would you suggest for the implementation of a hat / d-pad on top 
of GPIOs?

Thanks,
- Paul