NAME
BUS_ADD_CHILD —
add a device node to the tree with a
given priority
SYNOPSIS
#include
<sys/param.h>
#include <sys/bus.h>
device_t
BUS_ADD_CHILD(device_t
dev, int order,
const char *name,
int unit);
DESCRIPTION
TheBUS_ADD_CHILD()
method is used by the driver identify routine to add devices to the tree. It
can also be used to add children to buses that implement this routine in other
contexts, although the behavior is bus specific. Please see
device_add_child(9) for more details. The interface is the same
as
device_add_child(9) however, the bus'
BUS_ADD_CHILD() is called.
Buses implementing
BUS_ADD_CHILD()
should insert the device into the tree using
device_add_child(9) before adding things such as their own
ivars and resource lists to the device.
BUS_ADD_CHILD() is not called by
device_add_child(9). BUS_ADD_CHILD()
instead calls
device_add_child(9).
A panic will result when called for a bus
that does not implement
BUS_ADD_CHILD().
Some buses require a special bus-specific routine to be called instead of
BUS_ADD_CHILD().
RETURN VALUES
The BUS_ADD_CHILD() method returns
device_t added to the tree, or
NULL to indicate failure.
SEE ALSO
AUTHORS
This manual page was written by M. Warner Losh.