diff options
authorDmitry Torokhov <>2017-06-06 13:05:03 -0700
committerDmitry Torokhov <>2017-06-09 09:57:19 -0700
commita0897d5f2c2d884d20840c82aea517e8a7801441 (patch)
parent47eb0c8b4d9eb6368941c6a9bb443f00847a46d7 (diff)
Input: synaptics-rmi4 - register F03 port as pass-through serio
The 5th generation Thinkpad X1 Carbons use Synaptics touchpads accessible over SMBus/RMI, combined with ALPS or Elantech trackpoint devices instead of classic IBM/Lenovo trackpoints. Unfortunately there is no way for ALPS driver to detect whether it is dealing with touchpad + trackpoint combination or just a trackpoint, so we end up with a "phantom" dualpoint ALPS device in addition to real touchpad and trackpoint. Given that we do not have any special advanced handling for ALPS or Elantech trackpoints (unlike IBM trackpoints that have separate driver and a host of options) we are better off keeping the trackpoints in PS/2 emulation mode. We achieve that by setting serio type to SERIO_PS_PSTHRU, which will limit number of protocols psmouse driver will try. In addition to getting rid of the "phantom" touchpads, this will also speed up probing of F03 pass-through port. Reported-by: Damjan Georgievski <> Suggested-by: Benjamin Tissoires <> Acked-by: Benjamin Tissoires <> Signed-off-by: Dmitry Torokhov <>
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/input/rmi4/rmi_f03.c b/drivers/input/rmi4/rmi_f03.c
index 77dad045a468..ad71a5e768dc 100644
--- a/drivers/input/rmi4/rmi_f03.c
+++ b/drivers/input/rmi4/rmi_f03.c
@@ -146,7 +146,7 @@ static int rmi_f03_register_pt(struct f03_data *f03)
if (!serio)
return -ENOMEM;
- serio->id.type = SERIO_8042;
+ serio->id.type = SERIO_PS_PSTHRU;
serio->write = rmi_f03_pt_write;
serio->port_data = f03;