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register_chrdev_region(9) [centos man page]

REGISTER_CHRDEV_REGI(9) 					   Char devices 					   REGISTER_CHRDEV_REGI(9)

register_chrdev_region - register a range of device numbers SYNOPSIS
int register_chrdev_region(dev_t from, unsigned count, const char * name); ARGUMENTS
from the first in the desired range of device numbers; must include the major number. count the number of consecutive device numbers required name the name of the device or driver. DESCRIPTION
Return value is zero on success, a negative error code on failure. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 REGISTER_CHRDEV_REGI(9)

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makedevice(9F)                                             Kernel Functions for Drivers                                             makedevice(9F)

makedevice - make device number from major and minor numbers SYNOPSIS
#include <sys/types.h> #include <sys/mkdev.h> #include <sys/ddi.h> dev_t makedevice(major_t majnum, minor_t minnum); INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI). PARAMETERS
majnum Major device number. minnum Minor device number. DESCRIPTION
makedevice() creates a device number from a major and minor device number. makedevice() should be used to create device numbers so the driver will port easily to releases that treat device numbers differently. RETURN VALUES
The device number, containing both the major number and the minor number, is returned. No validation of the major or minor numbers is per- formed. CONTEXT
makedevice() can be called from user or interrupt context. SEE ALSO
getmajor(9F), getminor(9F) SunOS 5.10 11 Apr 1991 makedevice(9F)
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