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Input: add input_copy_abs() function

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Add a new helper function to copy absinfo from one input_dev to
another input_dev.

This is useful to e.g. setup a pen/stylus input-device for combined
touchscreen/pen hardware where the pen uses the same coordinates as
the touchscreen.

Suggested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220131143539.109142-2-hdegoede@redhat.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Hans de Goede
2022-02-28 22:58:28 -08:00
committed by Dmitry Torokhov
parent 3f9ed5c2fe
commit cb66b9ba5c
2 changed files with 38 additions and 0 deletions
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2
include/linux/input.h
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@@ -475,6 +475,8 @@ static inline void input_set_events_per_packet(struct input_dev *dev, int n_even
void input_alloc_absinfo(struct input_dev *dev);
void input_set_abs_params(struct input_dev *dev, unsigned int axis,
int min, int max, int fuzz, int flat);
void input_copy_abs(struct input_dev *dst, unsigned int dst_axis,
const struct input_dev *src, unsigned int src_axis);
#define INPUT_GENERATE_ABS_ACCESSORS(_suffix, _item) \
static inline int input_abs_get_##_suffix(struct input_dev *dev, \