centos man page for __register_chrdev

__REGISTER_CHRDEV(9)						   Char devices 					      __REGISTER_CHRDEV(9)

NAME
       __register_chrdev - create and register a cdev occupying a range of minors

SYNOPSIS
       int __register_chrdev(unsigned int major, unsigned int baseminor, unsigned int count, const char * name,
			     const struct file_operations * fops);

ARGUMENTS
       major
	   major device number or 0 for dynamic allocation

       baseminor
	   first of the requested range of minor numbers

       count
	   the number of minor numbers required

       name
	   name of this range of devices

       fops
	   file operations associated with this devices

DESCRIPTION
       If major == 0 this functions will dynamically allocate a major and return its number.

       If major > 0 this function will attempt to reserve a device with the given major number and will return zero on success.

       Returns a -ve errno on failure.

       The name of this device has nothing to do with the name of the device in /dev. It only helps to keep track of the different owners of
       devices. If your module name has only one type of devices it's ok to use e.g. the name of the module here.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						      __REGISTER_CHRDEV(9)