Am Freitag, den 14.06.2019, 13:58 -0600 schrieb Rob Herring: > 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. The stmpe touchcontroller does not support handling each axis separately. Also it is not to be mistaken in its specific behavior (i.e. override) for the general `fuzz` parameter. However, should I rename it to `st,fuzz-x-y` or similar? AFAICS there[0] is no generic combined devicetree property, is there? [0]https://www.kernel.org/doc/Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt > > > - 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 > >
