More info:

$ xinput --list
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ Fujitsu Component USB Touch Panel         id=9    [slave  pointer  (2)]
⎜   ↳ PS/2 Generic Mouse                        id=11   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Power Button                              id=8    [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=10   [slave  keyboard (3)]
    ↳ Panasonic Laptop Support                  id=12   [slave  keyboard (3)]

$ xinput list-props 11 | grep /dev/input/event
        Device Node (256):      "/dev/input/event6"

$ udevadm info -q path -n /dev/input/event6
/devices/platform/i8042/serio2/input/input9/event6

$ udevadm info -a -p /devices/platform/i8042/serio2/input/input9/event6 
Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/platform/i8042/serio2/input/input9/event6':
    KERNEL=="event6"
    SUBSYSTEM=="input"
    DRIVER==""

  looking at parent device '/devices/platform/i8042/serio2/input/input9':
    KERNELS=="input9"
    SUBSYSTEMS=="input"
    DRIVERS==""
    ATTRS{name}=="PS/2 Generic Mouse"
    ATTRS{phys}=="isa0060/serio2/input0"
    ATTRS{properties}=="1"
    ATTRS{uniq}==""

  looking at parent device '/devices/platform/i8042/serio2':
    KERNELS=="serio2"
    SUBSYSTEMS=="serio"
    DRIVERS=="psmouse"
    ATTRS{bind_mode}=="auto"
    ATTRS{description}=="i8042 AUX1 port"
    ATTRS{firmware_id}=="PNP: FJC6001 PNP0f13"
    ATTRS{protocol}=="PS/2"
    ATTRS{rate}=="100"
    ATTRS{resetafter}=="5"
    ATTRS{resolution}=="200"
    ATTRS{resync_time}=="0"

  looking at parent device '/devices/platform/i8042':
    KERNELS=="i8042"
    SUBSYSTEMS=="platform"
    DRIVERS=="i8042"
    ATTRS{driver_override}=="(null)"

  looking at parent device '/devices/platform':
    KERNELS=="platform"
    SUBSYSTEMS==""
    DRIVERS==""

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https://bugs.launchpad.net/bugs/1740116

Title:
  Touchpad incorrectly being detected by kernel as PS/2 mouse

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