centos man page for devclass

DEVCLASS(9)                                                BSD Kernel Developer's Manual                                               DEVCLASS(9)

NAME
     devclass -- object representing a class of devices

SYNOPSIS
     typedef struct devclass *devclass_t;

DESCRIPTION
     The devclass object has two main functions in the system.  The first is to manage the allocation of unit numbers for device instances and the
     second is to hold the list of device drivers for a particular bus type.  Each devclass has a name and there cannot be two devclasses with the
     same name.  This ensures that unique unit numbers are allocated to device instances.

     Beware that this means devclass must be the same for different bus attachments of the same device driver.

SEE ALSO
     devclass_add_driver(9), devclass_delete_driver(9), devclass_find(9), devclass_find_driver(9), devclass_get_device(9),
     devclass_get_devices(9), devclass_get_maxunit(9), devclass_get_name(9), devclass_get_softc(9), device(9), driver(9)

AUTHORS
     This manual page was written by Doug Rabson.

BSD                                                                June 16, 1998                                                               BSD