Input: synaptics - add Intertouch support on X1 Carbon 6th and X280

Synaptics devices reported it has Intertouch support,
and it fails via PS/2 as following logs:

psmouse serio2: Failed to reset mouse on synaptics-pt/serio0
psmouse serio2: Failed to enable mouse on synaptics-pt/serio0

Set these new devices to use SMBus to fix this issue, then they report
SMBus version 3 is using, patch:
https://patchwork.kernel.org/patch/9989547/ enabled SMBus ver 3 and
makes synaptics devices work fine on SMBus mode.

Signed-off-by: Aaron Ma <aaron.ma@canonical.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 6b9db57faa805348f0f8c04bac6f19becfb5fb9e..a88bb312f5f86262448c2551f9f67aaa774da32c 100644 (file)
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -174,6 +174,8 @@ static const char * const smbus_pnp_ids[] = {
        "LEN004a", /* W541 */
        "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
        "LEN0073", /* X1 Carbon G5 (Elantech) */
+       "LEN0092", /* X1 Carbon 6 */
+       "LEN0096", /* X280 */
        "LEN200f", /* T450s */
        NULL
 };