cdev_add — add a char device to the system
int cdev_add ( | struct cdev * p, |
| dev_t dev, | |
unsigned count); |
struct cdev * pthe cdev structure for the device
dev_t devthe first device number for which this device is responsible
unsigned countthe number of consecutive minor numbers corresponding to this device
cdev_add adds the device represented by p to the system, making it
live immediately. A negative error code is returned on failure.