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 in
stances and the
second is to hold the list of device drivers for a particu
lar 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 differ
ent bus
attachments of the same device driver.

SEE ALSO

devclass_add_driver(9), devclass_delete_driver(9), dev
class_find(9),
devclass_find_driver(9), devclass_get_device(9), dev
class_get_devices(9),
devclass_get_maxunit(9), devclass_get_name(9), dev
class_get_softc(9),
device(9), driver(9)

AUTHORS

This manual page was written by Doug Rabson.
BSD June 16, 1998
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