On Mon, May 27, 2019 at 06:19:37PM +0200, Leif Middelschulte wrote: > The tracking index is a "minimum" distance two touch > points need to have in order for the second to be valid. > This adds the corresponding binding property documentation. > > Signed-off-by: Leif Middelschulte <leif.middelschulte@xxxxxxxxxxxxx> > --- > .../bindings/input/touchscreen/stmpe.txt | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt > index 09d2d4f288cc..8696af35a7b8 100644 > --- a/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt > +++ b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt > @@ -42,6 +42,21 @@ Optional properties: > 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. > +- st,tracking-index : Minimal distance between the current touch position and the previous > + touch position. If the distance is shorter than the tracking > + index, it is discarded. The tracking is calculated by summation > + of the horizontal and vertical movement. > + If pressure reporting is enabled (X/Y/Z), an increase in pressure > + override the movement tracking and report the new data set, even > + if X/Y is within the previous tracking index. > + 0 -> disabled > + 1 -> 4 > + 4 -> 8 > + 3 -> 16 > + 4 -> 32 > + 5 -> 64 > + 6 -> 92 > + 7 -> 127 This is what touchscreen-fuzz-x/y is for. > - touchscreen-inverted-x: X axis is inverted (boolean) > - touchscreen-inverted-y: Y axis is inverted (boolean) > - touchscreen-swapped-x-y: X and Y axis are swapped (boolean) > -- > 2.21.0 >
