register_chrdev — Register a major number for character devices.
int register_chrdev ( | unsigned int | major, |
| const char * | name, | |
| const struct file_operations * | fops); |
majormajor device number or 0 for dynamic allocation
namename of this range of devices
fopsfile operations associated with this devices
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.