[Letux-kernel] [PATCH v9 1/8] drivers:input:tsc2007: add new common binding names, pre-calibration, flipping and rotation

Rob Herring robh at kernel.org
Mon Jan 9 18:43:44 CET 2017


On Wed, Dec 28, 2016 at 03:53:16PM +0100, H. Nikolaus Schaller wrote:
> commit b98abe52fa8e ("Input: add common DT binding for touchscreens")
> introduced common DT bindings for touchscreens [1] and a helper function to
> parse the DT.
> 
> commit ed7c9870c9bc ("Input: of_touchscreen - add support for inverted / swapped axes")
> added another helper for parsing axis inversion and swapping
> and applying them to x and y coordinates.
> 
> Both helpers have been integrated to accommodate any orientation of the
> touch panel in relation to the LCD.
> 
> A new feature is to introduce scaling the min/max ADC values to the screen
> size.
> 
> This makes it possible to pre-calibrate the touch so that is (almost)
> exactly matches the LCD pixel coordinates it is glued onto. This allows to
> well enough operate the touch before a user space calibration step can
> improve the precision.
> 
> Please note that the old ti,fuzz properties have been removed since they
> are replaced by the common bindings touchscreen-fuzz-x/y/z.
> 
> Finally, calculate_pressure has been renamed to calculate_resistance
> because that is what it is doing.
> 
> [1]: Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt
> 
> Signed-off-by: H. Nikolaus Schaller <hns at goldelico.com>
> ---
>  .../bindings/input/touchscreen/tsc2007.txt         |  20 ++--

Acked-by: Rob Herring <robh at kernel.org>

>  drivers/input/touchscreen/tsc2007.c                | 120 +++++++++++++++++----
>  include/linux/i2c/tsc2007.h                        |   8 ++
>  3 files changed, 118 insertions(+), 30 deletions(-)


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