[PATCH 2/2] Input: elantech - v4 is clickpad, with only one button

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Add pointer and buttonpad properties for v4 hardware.

Also, Jachiet reported that on Asus UX31, right button has no effect. It
turns out v4 has only one button, the right-button effect is implemented
with software when Windows driver is installed, or in firmware when touchpad
is in relative mode. So remove BTN_RIGHT while at it.

Reported-by: Jachiet Louis <louis@xxxxxxxxxxx>
Signed-off-by: JJ Ding <jj_ding@xxxxxxxxxx>
---
 drivers/input/mouse/elantech.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 21c68a8..4790110 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -486,7 +486,6 @@ static void elantech_input_sync_v4(struct psmouse *psmouse)
 	unsigned char *packet = psmouse->packet;
 
 	input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
-	input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
 	input_mt_report_pointer_emulation(dev, true);
 	input_sync(dev);
 }
@@ -967,6 +966,7 @@ static int elantech_set_input_params(struct psmouse *psmouse)
 	if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width))
 		return -1;
 
+	__set_bit(INPUT_PROP_POINTER, dev->propbit);
 	__set_bit(EV_KEY, dev->evbit);
 	__set_bit(EV_ABS, dev->evbit);
 	__clear_bit(EV_REL, dev->evbit);
@@ -1017,7 +1017,9 @@ static int elantech_set_input_params(struct psmouse *psmouse)
 			 */
 			psmouse_warn(psmouse, "couldn't query resolution data.\n");
 		}
-
+		/* v4 is clickpad, with only one button. */
+		__set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
+		__clear_bit(BTN_RIGHT, dev->keybit);
 		__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
 		/* For X to recognize me as touchpad. */
 		input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
-- 
1.7.10.rc1

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