On Thu, Jan 15, 2015 at 09:34:51PM +0100, Pali Rohár wrote: > On Wednesday 14 January 2015 23:55:54 Dmitry Torokhov wrote: > > From: Pali Rohár <pali.rohar@xxxxxxxxx> > > > > Previously dev2 device was used for both external PS/2 mouse > > and internal trackstick device (if available). This change > > introduces dev3 device which is used for external PS/2 mouse > > data and dev2 is now used only for trackstick. > > > > In case that trackstick is not present dev2 is not created, so > > userspace does not see non existent device in system. > > > > Because laptops with ALPS devices often do not use i8042 > > active multiplexing all data (from touchpad, trackstick and > > external PS/2 mouse) come to one port. So it is not possible > > to know if external PS/2 mouse is connected or not. In most > > cases external PS/2 mouse is not connected so driver will > > create dev3 input device after first bare PS/2 packet will be > > received. So there will not be "ghost" input device. > > > > This change also helps in identifying possible problems in > > future if driver decides to report 6-bytes trackstick packets > > as 3-bytes bare PS/2 (data will be reported to dev3 instead > > dev2). > > > > Signed-off-by: Pali Rohár <pali.rohar@xxxxxxxxx> > > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> > > Subject should be: "do *not* mix" or "prevent mix" Right, I'll adjust it. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
