Input: synaptics - Lenovo Thinkpad X1 Carbon G5 (2017) with Elantech trackpoints...

commit 15e2cffec3aa0d47a8d75ae80e1b136bfb5dff30 upstream.

Lenovo use two different trackpoints in the fifth generation Thinkpad X1
Carbon. Both are accessible over SMBUS/RMI but the pnpIDs are missing.
This patch is for the Elantech trackpoint specifically which also
reports SMB version 3 so rmi_smbus needs to be updated in order to
handle it.

For the record, I was not the first one to come up with this patch as it
has been floating around the internet for a while now. However, I have
spent significant time with testing and my efforts to find the original
author of the patch have been unsuccessful.

Signed-off-by: Edvard Holst <edvard.holst@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 0eca3fd..d2b14fe 100644 (file)
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -173,6 +173,7 @@ static const char * const smbus_pnp_ids[] = {
        "LEN0046", /* X250 */
        "LEN004a", /* W541 */
        "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
+       "LEN0073", /* X1 Carbon G5 (Elantech) */
        "LEN200f", /* T450s */
        NULL
 };