Re: [PATCH v3 1/2] input: Add new sun4i-ts driver for Allwinner sunxi SoC's rtp controller

[Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>]

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Hi Hans,

Thanks a lot for reposting this.

On Sat, May 10, 2014 at 12:47:05PM +0200, Hans de Goede wrote:
> Note the sun4i-ts controller is capable of detecting a second touch, but when
> a second touch is present then the accuracy becomes so bad the reported touch
> location is not useable.
> 
> The original android driver contains some complicated heuristics using the
> aprox. distance between the 2 touches to see if the user is making a pinch
> open / close movement, and then reports emulated multi-touch events around
> the last touch coordinate (as the dual-touch coordinates are worthless).
> 
> These kinds of heuristics are just asking for trouble (and don't belong
> in the kernel). So this driver offers straight forward, reliable single
> touch functionality only.
> 
> Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> ---
>  .../bindings/input/touchscreen/sun4i.txt           |  15 ++
>  drivers/input/touchscreen/Kconfig                  |  10 +
>  drivers/input/touchscreen/Makefile                 |   1 +
>  drivers/input/touchscreen/sun4i-ts.c               | 262 +++++++++++++++++++++
>  4 files changed, 288 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/input/touchscreen/sun4i.txt
>  create mode 100644 drivers/input/touchscreen/sun4i-ts.c
> 
> diff --git a/Documentation/devicetree/bindings/input/touchscreen/sun4i.txt b/Documentation/devicetree/bindings/input/touchscreen/sun4i.txt
> new file mode 100644
> index 0000000..e45927e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/touchscreen/sun4i.txt
> @@ -0,0 +1,15 @@
> +sun4i resistive touchscreen controller
> +--------------------------------------
> +
> +Required properties:
> + - compatible: "allwinner,sun4i-ts"

In between, I changed the compatible of this driver to sun4i-a10-ts to
match the pattern used everywhere else. You should probably update it
in your driver as well :)

Maxime

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

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