/dev/input/:
keyboard
mouse
touchpad
wacom

/dev/input/keyboard:
at
usb

/dev/input/keyboard/at:
0

/dev/input/keyboard/usb:
0

/dev/input/mouse:
ps2
usb

/dev/input/mouse/ps2:
standard_3

/dev/input/mouse/usb:
0

/dev/input/touchpad:
ps2

/dev/input/touchpad/ps2:
synaptics_3

/dev/input/wacom:
usb

/dev/input/wacom/usb:
control