CDEV_ADD(9) Char devices CDEV_ADD(9)
NAME cdev_add - add a char device to the system
SYNOPSIS int cdev_add(struct cdev * p, dev_t dev, unsigned count);
ARGUMENTS p the cdev structure for the device
dev the first device number for which this device is responsible
count the number of consecutive minor numbers corresponding to this device
DESCRIPTION cdev_add adds the device represented by p to the system, making it live immediately. A negative error code is returned on failure.
COPYRIGHT Kernel Hackers Manual 2.6. January 2013 CDEV_ADD(9)