Re: [linux-sunxi] Re: [PATCH v3 2/3] dt-bindings: input: Add R_LRADC support for A83T

[Ziping Chen]

2017-06-28 1:36 GMT+08:00 Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>:
> Hi,
>
> On Tue, Jun 27, 2017 at 11:29:10PM +0800, icenowy@xxxxxxx wrote:
>> Maxime, here's another problem: if we have already a GP LRADC driver,
>> how can we tell the kernel to use it as IIO ADC rather than keys?
>
> The GPADC IIO driver is not for the LRADC driver, but the GPADC /
> temperature sensor.
>
> We used to have an LRADC IIO driver in the CHIP BSP written by Alex
> (in CC):
> https://github.com/NextThingCo/CHIP-linux/commit/8675b761c54be73dc7cc0113209f02e10cc63a27
>
> But he never mainlined it.
>
>> Should we introduce a new property for this once ready?
>
> We need to keep the current binding. We can just check for the
> presence or not of child nodes to see if it has some keys, and we'd
> need an IIO-to-input driver that is yet to be written.
>

Yes, then we need an iio-to-input driver...
So...whether the driver(a83t lradc keys) can be applied now,
or we should wait for the iio-to-input driver.

Thanks
Ziping

> Maxime
>
> --
> Maxime Ripard, Free Electrons
> Embedded Linux and Kernel engineering
> http://free-electrons.com