Hi Benjamin, On Wed, Nov 07, 2012 at 05:37:35PM +0100, Benjamin Tissoires wrote: > Win 8 digitizer devices provides the actual scan time computed by the > hardware itself. The value is global to the frame and is not specific > to the multitouch protocol (though only touch, not pen, should use it > according to the specification). > > Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxx> > --- > Documentation/input/event-codes.txt | 9 +++++++++ > drivers/hid/hid-input.c | 4 ++++ > include/linux/hid.h | 1 + > include/linux/input.h | 1 + > 4 files changed, 15 insertions(+) > > diff --git a/Documentation/input/event-codes.txt b/Documentation/input/event-codes.txt > index 53305bd..80c06e5 100644 > --- a/Documentation/input/event-codes.txt > +++ b/Documentation/input/event-codes.txt > @@ -174,6 +174,15 @@ A few EV_ABS codes have special meanings: > the input device may be used freely in three dimensions, consider ABS_Z > instead. > > +* ABS_SCAN_TIME: > + - Used to report the number of microseconds since the last reset. This event > + should be coded as an uint32 value, which is allowed to wrap around with > + no special consequence. It is assumed that the time difference between two > + consecutive events is reliable on a reasonable time scale (hours). > + A reset to zero can happen, in which case the time since the last event is > + unknown. If the device does not provide this information, the driver must > + not provide it to the user space. > + This should not be an absolute event but rather EV_MSC/MSC_TIMESTAMP. Thanks. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
