[PATCH 4.16 14/47] Input: synaptics - Lenovo Thinkpad X1 Carbon G5 (2017) with Elantech trackpoints should use RMI

From: Greg Kroah-Hartman
Date: Mon Jun 04 2018 - 03:19:19 EST

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


From: Edvard Holst <edvard.holst@xxxxxxxxx>

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

drivers/input/mouse/synaptics.c | 1 +
1 file changed, 1 insertion(+)

--- 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 */