config DGRP
       tristate "Digi Realport driver"
       default n
       depends on SYSFS && TTY
       ---help---
       Support for Digi Realport devices.  These devices allow you to
       access remote serial ports as if they are local tty devices.  This
       will build the kernel driver, you will still need the userspace
       component to make your Realport device work.