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| author |   Henrik Rydberg <rydberg@euromail.se> | 2012-09-15 15:15:58 +0200 |
|---|---|---|
| committer | Henrik Rydberg <rydberg@euromail.se> | 2012-09-19 19:50:17 +0200 |
| commit | 8d18fba282120a4a8e4416d1202522ffae8cad58 (patch) | |
| tree | 22e3ddabba314c9ad544b9fefe004194205c2940 /include/linux/input/mt.h | |
| parent | Linux 3.6-rc4 (diff) | |
| download | linux-dev-8d18fba282120a4a8e4416d1202522ffae8cad58.tar.xz linux-dev-8d18fba282120a4a8e4416d1202522ffae8cad58.zip | |
Input: Break out MT data
Move all MT-related things to a separate place. This saves some
bytes for non-mt input devices, and prepares for new MT features.
Reviewed-and-tested-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Tested-by: Ping Cheng <pingc@wacom.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Diffstat (limited to 'include/linux/input/mt.h')
| -rw-r--r-- | include/linux/input/mt.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/include/linux/input/mt.h b/include/linux/input/mt.h index f86737586e19..63458bced77d 100644 --- a/include/linux/input/mt.h +++ b/include/linux/input/mt.h @@ -23,6 +23,20 @@ struct input_mt_slot { int abs[ABS_MT_LAST - ABS_MT_FIRST + 1]; }; +/** + * struct input_mt - state of tracked contacts + * @trkid: stores MT tracking ID for the next contact + * @num_slots: number of MT slots the device uses + * @slot: MT slot currently being transmitted + * @slots: array of slots holding current values of tracked contacts + */ +struct input_mt { + int trkid; + int num_slots; + int slot; + struct input_mt_slot slots[]; +}; + static inline void input_mt_set_value(struct input_mt_slot *slot, unsigned code, int value) { @@ -38,9 +52,9 @@ static inline int input_mt_get_value(const struct input_mt_slot *slot, int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots); void input_mt_destroy_slots(struct input_dev *dev); -static inline int input_mt_new_trkid(struct input_dev *dev) +static inline int input_mt_new_trkid(struct input_mt *mt) { - return dev->trkid++ & TRKID_MAX; + return mt->trkid++ & TRKID_MAX; } static inline void input_mt_slot(struct input_dev *dev, int slot) |