diff options
| author | Stefan Assmann <sassmann@kpanic.de> | 2015-08-26 13:11:49 -0700 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2015-10-28 16:38:29 +0100 |
| commit | 666e2269eccc2f1a996b6110040f37d45cb76840 (patch) | |
| tree | 4e2b933dffb0647f4b5f5c14ebde6c17bec14b88 | |
| parent | 370cacfe2f1a6d0597c7b7b1714ad8a52bccc918 (diff) | |
Input: psmouse - add small delay for IBM trackpoint pass-through mode
commit 66bc2f51ef7deabc8b8f3baa98ae64b65e5e973a upstream.
There are trackpoint devices that fail to respond to the PS2 command
PSMOUSE_CMD_GETID if immediately queried after the parent device is
deactivated. Add a small delay for the hardware to get in a sane state
before sending any PS2 commands.
One example of such a system is:
Lenovo ThinkPad X120e, model 30515QG
synaptics: Touchpad model: 1, fw: 8.0, id: 0x1e2b1, caps: 0xd001a3/0x940300/0x121c00, board id: 1811, fw id: 797391
Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Oliver Neukum <ONeukum@suse.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
| -rw-r--r-- | drivers/input/mouse/psmouse-base.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c index cff065f6261c..de3d92077c77 100644 --- a/drivers/input/mouse/psmouse-base.c +++ b/drivers/input/mouse/psmouse-base.c @@ -1441,6 +1441,10 @@ static int psmouse_connect(struct serio *serio, struct serio_driver *drv) if (error) goto err_clear_drvdata; + /* give PT device some time to settle down before probing */ + if (serio->id.type == SERIO_PS_PSTHRU) + usleep_range(10000, 15000); + if (psmouse_probe(psmouse) < 0) { error = -ENODEV; goto err_close_serio; |