Input: synaptics - add support for reporting x/y resolution

Synaptics uses anisotropic coordinate system.  On some wide touchpads
vertical resolution can be twice as high as horizontal which causes
unequal sensitivity on x/y directions.  Add support for reading the
resolution with EVIOCGABS ioctl.

Signed-off-by: Tero Saarni <tero.saarni@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/input.h b/include/linux/input.h
index 6fed4f6a9c9e..8b3bc3e0d146 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -53,6 +53,7 @@ struct input_absinfo {
         __s32 maximum;
         __s32 fuzz;
         __s32 flat;
+        __s32 resolution;
 };
 
 #define EVIOCGVERSION           _IOR('E', 0x01, int)                    /* get driver version */
@@ -1109,6 +1110,7 @@ struct input_dev {
         int absmin[ABS_MAX + 1];
         int absfuzz[ABS_MAX + 1];
         int absflat[ABS_MAX + 1];
+        int absres[ABS_MAX + 1];
 
         int (*open)(struct input_dev *dev);
         void (*close)(struct input_dev *dev);