__register_chrdev — create and register a cdev occupying a range of minors
int __register_chrdev ( | unsigned int major, |
| unsigned int baseminor, | |
| unsigned int count, | |
| const char * name, | |
const struct file_operations * fops); |
majormajor device number or 0 for dynamic allocation
baseminorfirst of the requested range of minor numbers
countthe number of minor numbers required
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.