On Fri, Nov 06, 2015 at 04:14:47PM +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.
>
> This has been integrated and interpretation of the inversion (flipping)
> properties for the x and y axis has been added to accommodate any
> orientation of the touch in relation to the LCD.
>
> By scaling the min/max ADC values to the screen size it is now possible to
> pre-calibrate the touch so that is (almost) exactly matches the LCD it is
> glued onto. This allows to well enough operate the touch before a user
> space calibration can improve the precision.
>
> [1]: Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt
>
> Signed-off-by: H. Nikolaus Schaller <h...@goldelico.com>
> ---
> .../devicetree/bindings/input/ads7846.txt | 8 ++-
The binding change looks okay, but...
> @@ -1213,7 +1259,7 @@ static const struct ads7846_platform_data
> *ads7846_probe_dt(struct device *dev)
> of_property_read_u16(node, "ti,vref-mv", &pdata->vref_mv);
> pdata->keep_vref_on = of_property_read_bool(node, "ti,keep-vref-on");
>
> - pdata->swap_xy = of_property_read_bool(node, "ti,swap-xy");
> + pdata->swap_xy = of_property_read_bool(node, "touchscreen-swapped-x-y");
This will break with old dtb's. The driver should look for either
property.
Rob
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