//sys/bus/platform/drivers/serial8250/serial8250/tty:ttyS3/subsystem/tty60/subsystem/tty18/subsystem/tty37/subsystem/tty35/subsystem/tty36/subsystem/tty11/subsystem/ptmx/subsystem/tty18/subsystem/ttyS0/device/tty:ttyS2/subsystem/tty4/subsystem/ttyS3/device/power/state