systemd/etc/udev/debian/persistent-input.rules

SUBSYSTEM!="input",			GOTO="persistent_input_end"
ACTION!="add",				GOTO="persistent_input_end"
# ignore the mid-level drivers
KERNEL=="input[0-9]*",			GOTO="persistent_input_end"

# usb devices
BUS=="usb",				IMPORT{program}="usb_id -x"
BUS=="usb", SYSFS{bInterfaceClass}=="03", SYSFS{bInterfaceProtocol}=="01", \
					ENV{ID_CLASS}="kbd"
BUS=="usb", SYSFS{bInterfaceClass}=="03", SYSFS{bInterfaceProtocol}=="02", \
					ENV{ID_CLASS}="mouse"

# by-id links, generic and for the event devices
KERNEL=="mouse*", \
	ENV{ID_BUS}=="?*", ENV{ID_SERIAL}=="?*", ENV{ID_CLASS}=="?*", \
	SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-$env{ID_CLASS}"
KERNEL=="event*", \
	ENV{ID_BUS}=="?*", ENV{ID_SERIAL}=="?*", ENV{ID_CLASS}=="?*", \
	SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-event-$env{ID_CLASS}"

# by-path links
IMPORT{program}="path_id %p"
KERNEL=="mouse*", ENV{ID_PATH}=="?*", \
	SYMLINK+="input/by-path/$env{ID_PATH}-$env{ID_CLASS}"
KERNEL=="event*", ENV{ID_PATH}=="?*", \
	SYMLINK+="input/by-path/$env{ID_PATH}-event-$env{ID_CLASS}"

LABEL="persistent_input_end"