Input: elantech - discard the first 2 positions on some firmwares

According to the Dell/Ubuntu driver, what was previously observed as
"jumpy cursor" corresponds to the hardware sending incorrect data for
the first two reports of a one touch finger. So let's use the same
workaround as in the other driver. Also, detect another firmware
version with the same behaviour, as in the other driver.

Signed-off-by: Éric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
index ac57bde1bb9f..aa4aac5d2198 100644
--- a/drivers/input/mouse/elantech.h
+++ b/drivers/input/mouse/elantech.h
@@ -100,10 +100,11 @@ struct elantech_data {
         unsigned char reg_26;
         unsigned char debug;
         unsigned char capabilities;
-        unsigned char paritycheck;
-        unsigned char jumpy_cursor;
+        bool paritycheck;
+        bool jumpy_cursor;
         unsigned char hw_version;
-        unsigned int  fw_version;
+        unsigned int fw_version;
+        unsigned int single_finger_reports;
         unsigned char parity[256];
 };