systemd/rules/rules.d/60-persistent-input.rules

# do not edit this file, it will be overwritten on update

ACTION!="add|change", GOTO="persistent_input_end"
SUBSYSTEM!="input", GOTO="persistent_input_end"
KERNEL=="input[0-9]*", GOTO="persistent_input_end"

ENV{ID_INPUT}=="", IMPORT{program}="input_id %p"
SUBSYSTEMS=="usb", ENV{ID_BUS}=="", IMPORT{program}="usb_id --export %p"

# backwards-compatibility ID_CLASS
ENV{ID_INPUT_KEYBOARD}=="?*", ENV{ID_CLASS}="kbd"
ENV{ID_INPUT_MOUSE}=="?*", ENV{ID_CLASS}="mouse"
ENV{ID_INPUT_JOYSTICK}=="?*", ENV{ID_CLASS}="joystick"

# other device types which we need for persistent links
DRIVERS=="pcspkr", ENV{ID_CLASS}="spkr", GOTO="serial"
ATTRS{name}=="*dvb*|*DVB*|* IR *", ENV{ID_CLASS}="ir", GOTO="serial"

# fill empty serial number
LABEL="serial", ENV{ID_CLASS}=="?*", ENV{ID_SERIAL}=="", ENV{ID_SERIAL}="noserial"

# by-id links
KERNEL=="mouse*|js*", ENV{ID_BUS}=="?*", ENV{ID_CLASS}=="?*", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-$env{ID_CLASS}"
KERNEL=="event*", ENV{ID_BUS}=="?*", ENV{ID_CLASS}=="?*", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-event-$env{ID_CLASS}"
# allow empty class for USB devices, by appending the interface number
SUBSYSTEMS=="usb", ENV{ID_BUS}=="?*", KERNEL=="event*", ENV{ID_CLASS}=="", ATTRS{bInterfaceNumber}=="?*", \
  SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-event-if$attr{bInterfaceNumber}"

# by-path
SUBSYSTEMS=="usb|platform", IMPORT{program}="path_id %p"
ENV{ID_PATH}=="?*", KERNEL=="mouse*|js*", ENV{ID_CLASS}=="?*", SYMLINK+="input/by-path/$env{ID_PATH}-$env{ID_CLASS}"
ENV{ID_PATH}=="?*", KERNEL=="event*", ENV{ID_CLASS}=="?*", SYMLINK+="input/by-path/$env{ID_PATH}-event-$env{ID_CLASS}"
# allow empty class for platform and usb devices; platform supports only a single interface that way
SUBSYSTEMS=="usb|platform", ENV{ID_PATH}=="?*", KERNEL=="event*", ENV{ID_CLASS}=="", \
  SYMLINK+="input/by-path/$env{ID_PATH}-event"

LABEL="persistent_input_end"