On Wed, 14 Nov 2012, Dmitry Torokhov wrote:

On Wed, Nov 14, 2012 at 04:59:21PM +0100, Benjamin Tissoires wrote:

quoted

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 <redacted>
Reviewed-by: Henrik Rydberg <redacted>

Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

I take it will go through Jiri's tree, right?

Yup, I am taking it together with the rest of the series, and including 
your Ack. Thanks a lot.

quoted

---
 Documentation/input/event-codes.txt | 11 +++++++++++
 include/linux/input.h               |  1 +
 2 files changed, 12 insertions(+)

diff --git a/Documentation/input/event-codes.txt b/Documentation/input/event-codes.txt
index 53305bd..f1ea2c6 100644
--- a/Documentation/input/event-codes.txt
+++ b/Documentation/input/event-codes.txt

@@ -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

diff --git a/include/linux/input.h b/include/linux/input.h
index ba48743..25354f3 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h

@@ -858,6 +858,7 @@ 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)
 

-- 
1.8.0

-- 
Dmitry

-- 
Jiri Kosina
SUSE Labs