BUS_ADD_CHILD — add a device node to the tree with a given priority

       This manual page was written by M. Warner Losh.

Debian                                            April 8, 2018                                 BUS_ADD_CHILD(9)

       The  BUS_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().

       BUS_ADD_CHILD — add a device node to the tree with a given priority

       The BUS_ADD_CHILD() method returns device_t added to the tree, or NULL to indicate failure.

device(9), device_add_child(9), driver(9)

#include<sys/param.h>#include<sys/bus.h>device_tBUS_ADD_CHILD(device_tdev, intorder, constchar*name, intunit);