On Mon, May 27, 2019 at 06:07:27PM +0200, Leif Middelschulte wrote:
> The STMPE811 is able to only monitor a subwindow of the
> entire screen. Touches outside of this window are neglected.
> This change adds the corresponding documentation.
Unless you are trying to just filter out the edge values which I think
we already have properties for, wouldn't this be something the user
may want to adjust/move at runtime?
>
> Signed-off-by: Leif Middelschulte <leif.middelschulte@xxxxxxxxxxxxx>
> ---
> .../devicetree/bindings/input/touchscreen/stmpe.txt | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt
> index c549924603d2..04962e2e1ad0 100644
> --- a/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt
> +++ b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt
> @@ -33,6 +33,13 @@ Optional properties:
> - st,i-drive : current limit value of the touchscreen drivers
> 0 -> 20 mA (typical 35mA max)
> 1 -> 50 mA (typical 80 mA max)
> +- st,window-tracking : An u12 array that allows to pre-set a sub-window in the touchscreen.
u16?
> + Any touch position that is outside the sub-window is discarded
> + (top-right x, top-right y, bottom-left x, bottom-left y).
> + The given window also affects the value range (limits) set
> + within the input subsystem which, in turn, affects
> + the input resolution calculation on both axes.
> +
>
> Optional properties common with MFD (deprecated):
> - st,sample-time : ADC conversion time in number of clock.
> @@ -101,6 +108,8 @@ stmpe811@41 {
> * current limit value
> */
> st,i-drive = <1>;
> + /* enable entire window */
> + st,window-tracking = /bits/ 16 <4095 4095 0 0>;
> };
> stmpe_adc {
> compatible = "st,stmpe-adc";
> --
> 2.21.0
>
