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 it´s 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.