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Input: of_touchscreen - add support for inverted / swapped axes

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Extend touchscreen_parse_properties() with support for the
touchscreen-inverted-x/y and touchscreen-swapped-x-y properties and
add touchscreen_set_mt_pos() and touchscreen_report_pos() helper
functions for storing coordinates into a input_mt_pos struct, or
directly reporting them, taking these properties into account.

This commit also modifies the existing callers of
touchscreen_parse_properties() to pass in NULL for the new third
argument, keeping the existing behavior.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Hans de Goede 2016-07-15 14:05:29 -07:00 • committed by Dmitry Torokhov
parent 345ded8ef4
commit ed7c9870c9
7 changed files with 105 additions and 7 deletions
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21
include/linux/input/touchscreen.h
View file

@ -10,7 +10,26 @@
#define _TOUCHSCREEN_H
struct input_dev;
struct input_mt_pos;
void touchscreen_parse_properties(struct input_dev *dev, bool multitouch);
struct touchscreen_properties {
unsigned int max_x;
unsigned int max_y;
bool invert_x;
bool invert_y;
bool swap_x_y;
};
void touchscreen_parse_properties(struct input_dev *input, bool multitouch,
struct touchscreen_properties *prop);
void touchscreen_set_mt_pos(struct input_mt_pos *pos,
const struct touchscreen_properties *prop,
unsigned int x, unsigned int y);
void touchscreen_report_pos(struct input_dev *input,
const struct touchscreen_properties *prop,
unsigned int x, unsigned int y,
bool multitouch);
#endif