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.\" $FreeBSD: src/share/man/man9/BUS_ADD_CHILD.9,v 1.4.22.1.6.1 2010/12/21 17:09:25 kensmith Exp $
.\"
.Dd May 13, 2004
.Dt BUS_ADD_CHILD 9
.Os
.Sh NAME
.Nm BUS_ADD_CHILD
.Nd "add a device node to the tree with a given priority"
.Sh SYNOPSIS
.In sys/param.h
.In sys/bus.h
.Ft int
.Fn BUS_ADD_CHILD "device_t dev" "int order" "const char *name" "int unit"
.Sh DESCRIPTION
The
.Fn BUS_ADD_CHILD
method
is used by the driver identify routine to add devices to the tree.
Please see
.Xr device_add_child 9
for more details.
The interface is the same as
.Xr device_add_child 9
however, the bus'
.Fn BUS_ADD_CHILD
is called.
.Pp
Busses implementing
.Fn BUS_ADD_CHILD
should insert the device into the tree using
.Xr device_add_child 9
before adding things such as their own ivars and resource lists to the device.
.Sh RETURN VALUES
The
.Fn BUS_ADD_CHILD
method returns
.Vt device_t
added to the tree, or
.Dv NULL .
.Sh SEE ALSO
.Xr device 9 ,
.Xr device_add_child 9 ,
.Xr driver 9
.Sh AUTHORS
This manual page was written by
.An M. Warner Losh .