centos man page for parport_register_driver

PARPORT_REGISTER_DRI(9) 				       Parallel Port Devices					   PARPORT_REGISTER_DRI(9)

NAME
       parport_register_driver - register a parallel port device driver

SYNOPSIS
       int parport_register_driver(struct parport_driver * drv);

ARGUMENTS
       drv
	   structure describing the driver

DESCRIPTION
       This can be called by a parallel port device driver in order to receive notifications about ports being found in the system, as well as
       ports no longer available.

       The drv structure is allocated by the caller and must not be deallocated until after calling parport_unregister_driver.

       The driver's attach function may block. The port that attach is given will be valid for the duration of the callback, but if the driver
       wants to take a copy of the pointer it must call parport_get_port to do so. Calling parport_register_device on that port will do this for
       you.

       The driver's detach function may block. The port that detach is given will be valid for the duration of the callback, but if the driver
       wants to take a copy of the pointer it must call parport_get_port to do so.

       Returns 0 on success. Currently it always succeeds.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   PARPORT_REGISTER_DRI(9)