Input: introduce EV_MSC Timestamp

Some devices provides the actual timestamp (hid_dg_scan_time in win8 ones)
computed by the hardware itself. This value is global to the frame and is
not specific to the multitouch protocol.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires 2012-11-14 16:59:21 +01:00 committed by Jiri Kosina
parent 20b60e6dee
commit af8036dd74
2 changed files with 12 additions and 0 deletions

View file

@ -196,6 +196,17 @@ EV_MSC:
EV_MSC events are used for input and output events that do not fall under other
categories.
A few EV_MSC codes have special meaning:
* MSC_TIMESTAMP:
- 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 user space.
EV_LED:
----------
EV_LED events are used for input and output to set and query the state of

View file

@ -851,6 +851,7 @@ struct input_keymap_entry {
#define MSC_GESTURE 0x02
#define MSC_RAW 0x03
#define MSC_SCAN 0x04
#define MSC_TIMESTAMP 0x05
#define MSC_MAX 0x07
#define MSC_CNT (MSC_MAX+1)