On Wed, Nov 14, 2012 at 04:59:21PM +0100, Benjamin Tissoires wrote:
> 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@xxxxxxxxx>
> Reviewed-by: Henrik Rydberg <rydberg@xxxxxxxxxxx>
Acked-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
I take it will go through Jiri's tree, right?
> ---
> 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
--
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
