[PATCH 4.9 72/94] Input: elantech - enable middle button of touchpad on ThinkPad P72

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Aaron Ma <aaron.ma@xxxxxxxxxxxxx>

commit 91a97507323e1ad4bfc10f4a5922e67cdaf8b3cd upstream.

Adding 2 new touchpad IDs to support middle button support.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Aaron Ma <aaron.ma@xxxxxxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/input/mouse/elantech.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -1176,6 +1176,8 @@ static const struct dmi_system_id elante
 static const char * const middle_button_pnp_ids[] = {
 	"LEN2131", /* ThinkPad P52 w/ NFC */
 	"LEN2132", /* ThinkPad P52 */
+	"LEN2133", /* ThinkPad P72 w/ NFC */
+	"LEN2134", /* ThinkPad P72 */
 	NULL
 };