__REGISTER_CHRDEV - Online Linux Manual Page

Section : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : Char devices
NAME__register_chrdev − create and register a cdev occupying a range of minors
SYNOPSISint __register_chrdev(unsigned int major, unsigned int baseminor, unsigned int count, const char * name, const struct file_operations * fops);
ARGUMENTSmajor major device number or 0 for dynamic allocation baseminor first of the requested range of minor numbers count the number of minor numbers required name name of this range of devices fops file operations associated with this devices
DESCRIPTIONIf 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​.
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