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| author | Nicolas Boichat <drinkcat@chromium.org> | 2017-08-22 09:10:11 +0800 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2017-10-05 11:18:18 +0200 |
| commit | 29cc309d8bf19a36c5196bf626662319af6e3c0b (patch) | |
| tree | 7cda1e048d81ab5cb01ce761d7fec4f6a7020ec9 /include/linux/hid.h | |
| parent | b42a362e6d10c342004b183defcb9940331b6737 (diff) | |
| download | lwn-29cc309d8bf19a36c5196bf626662319af6e3c0b.tar.gz lwn-29cc309d8bf19a36c5196bf626662319af6e3c0b.zip | |
HID: hid-multitouch: forward MSC_TIMESTAMP
Computes and forwards the device timestamp according to the specification.
Many devices use a 16-bit timestamp field, with a resolution of 100us,
therefore rolling around very frequently (every 6.5 seconds). To make sure
there is no ambiguity, the timestamp reported to the input stack reset to
0 whenever the time between 2 received events is greater than
MAX_TIMESTAMP_INTERVAL (1 second).
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'include/linux/hid.h')
| -rw-r--r-- | include/linux/hid.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/hid.h b/include/linux/hid.h index ab05a86269dc..47dd962d9a7a 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -289,6 +289,7 @@ struct hid_item { #define HID_DG_DEVICEINDEX 0x000d0053 #define HID_DG_CONTACTCOUNT 0x000d0054 #define HID_DG_CONTACTMAX 0x000d0055 +#define HID_DG_SCANTIME 0x000d0056 #define HID_DG_BUTTONTYPE 0x000d0059 #define HID_DG_BARRELSWITCH2 0x000d005a #define HID_DG_TOOLSERIALNUMBER 0x000d005b |