register_chrdev(9)
NAME
register_chrdev - Register a major number for character devices.
SYNOPSIS
int register_chrdev(unsigned int major, const char * name,
const struct file_operations * fops);
ARGUMENTS
- major
- major device number or 0 for dynamic allocation
- 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 itīs ok to
use e.g. the name of the module here.
This function registers a range of 256 minor numbers. The first minor
number is 0.