On Thu, 30 Aug 2018, Harry Cutts wrote: > This event code represents scroll reports from high-resolution wheels, > and will be used by future patches in this series. See the linux-input > "Reporting high-resolution scroll events" thread [0] for more details. > > [0]: https://www.spinics.net/lists/linux-input/msg57380.html > > Signed-off-by: Harry Cutts <hcutts@xxxxxxxxxxxx> > --- > > Changes in v2: None > > Documentation/input/event-codes.rst | 11 ++++++++++- > include/uapi/linux/input-event-codes.h | 1 + > 2 files changed, 11 insertions(+), 1 deletion(-) > > diff --git a/Documentation/input/event-codes.rst b/Documentation/input/event-codes.rst > index a8c0873beb95..cef220c176a4 100644 > --- a/Documentation/input/event-codes.rst > +++ b/Documentation/input/event-codes.rst > @@ -190,7 +190,16 @@ A few EV_REL codes have special meanings: > * REL_WHEEL, REL_HWHEEL: > > - These codes are used for vertical and horizontal scroll wheels, > - respectively. > + respectively. The value is the number of "notches" moved on the wheel, the > + physical size of which varies by device. For high-resolution wheels (which > + report multiple events for each notch of movement, or do not have notches) > + this may be an approximation based on the high-resolution scroll events. > + > +* REL_WHEEL_HI_RES: > + > + - If a vertical scroll wheel supports high-resolution scrolling, this code > + will be emitted in addition to REL_WHEEL. The value is the (approximate) > + distance travelled by the user's finger, in microns. > > EV_ABS > ------ > diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h > index 53fbae27b280..dad8d3890a3a 100644 > --- a/include/uapi/linux/input-event-codes.h > +++ b/include/uapi/linux/input-event-codes.h > @@ -708,6 +708,7 @@ > #define REL_DIAL 0x07 > #define REL_WHEEL 0x08 > #define REL_MISC 0x09 > +#define REL_WHEEL_HI_RES 0x0a > #define REL_MAX 0x0f > #define REL_CNT (REL_MAX+1) Dmitry, is this OK with you? Thanks, -- Jiri Kosina SUSE Labs
