linux-kernel - Re: [linux-sunxi] Re: [PATCH v3 2/3] dt-bindings: input: Add R

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Message-ID: <20170629075324.oflzdye3pi5ijzcr@flea>
Date:   Thu, 29 Jun 2017 09:53:24 +0200
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Ziping Chen <techping.chan@...il.com>
Cc:     icenowy@...c.io, Chen-Yu Tsai <wens@...e.org>,
        Rob Herring <robh@...nel.org>, mark.rutland@....com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Subject: Re: [linux-sunxi] Re: [PATCH v3 2/3] dt-bindings: input: Add R_LRADC
 support for A83T

On Thu, Jun 29, 2017 at 12:45:51PM +0800, Ziping Chen wrote:
> 2017-06-28 1:36 GMT+08:00 Maxime Ripard <maxime.ripard@...e-electrons.com>:
> > Hi,
> >
> > On Tue, Jun 27, 2017 at 11:29:10PM +0800, icenowy@...c.io 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.

This is a long term discussion, it shouldn't hold the patches you
sent.

Maxime

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

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