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

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Date:   Tue, 27 Jun 2017 19:31:59 +0200
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Ziping Chen <techping.chan@...il.com>
Cc:     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
Subject: Re: [PATCH v3 2/3] dt-bindings: input: Add R_LRADC support for A83T

On Tue, Jun 27, 2017 at 11:18:17PM +0800, Ziping Chen wrote:
> 2017-06-27 1:15 GMT+08:00 Maxime Ripard <maxime.ripard@...e-electrons.com>:
> > Hi,
> >
> > On Sat, Jun 24, 2017 at 10:45:14AM +0800, Ziping Chen wrote:
> >> From: Ziping Chen <techping.chan@...il.com>
> >>
> >> Allwinner A83T SoC has a low res adc like the one
> >> in Allwinner A10 SoC.
> >>
> >> Add binding for it.
> >>
> >> Signed-off-by: Ziping Chen <techping.chan@...il.com>
> >> Acked-by: Rob Herring <robh@...nel.org>
> >> ---
> >>  Documentation/devicetree/bindings/input/sun4i-lradc-keys.txt | 6 ++++--
> >>  1 file changed, 4 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/Documentation/devicetree/bindings/input/sun4i-lradc-keys.txt b/Documentation/devicetree/bindings/input/sun4i-lradc-keys.txt
> >> index 4357e498ef04..525d85e3043f 100644
> >> --- a/Documentation/devicetree/bindings/input/sun4i-lradc-keys.txt
> >> +++ b/Documentation/devicetree/bindings/input/sun4i-lradc-keys.txt
> >> @@ -2,12 +2,14 @@ Allwinner sun4i low res adc attached tablet keys
> >>  ------------------------------------------------
> >>
> >>  Required properties:
> >> - - compatible: "allwinner,sun4i-a10-lradc-keys"
> >> + - compatible: should be one of the following string:
> >> +             "allwinner,sun4i-a10-lradc-keys"
> >> +             "allwinner,sun8i-a83t-r-lradc-keys"
> >
> > This doesn't really have anything related to keys, and can be used
> > purely as an ADC.
> >
> > I know this is the compatible that was used for the A10, but I'd
> > rather drop the keys for the the new compatible.
> >
> 
> LRADC is named KEYADC in some other SoCs' User Manual(such as R40 User
> Manual V1.0), thus LRADC is related to keys.

It's still called LRADC on the A83T, so we'll use that name. If we
ever need another compatible for the R40, then yes, keyadc would make
sense in that case.

Maxime

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

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