device_find_child
- search for a child of a device
SYNOPSIS
#include <sys/param.h>
#include <sys/bus.h> device_t
device_find_child (device_t dev const char *classname int unit);
DESCRIPTION
This function looks for a specific child of
dev
with the given
Fa classname
and
Fa unit .
If
Fa unit
is -1, it returns the first child of
Fa dev
with a matching
Fa classname
(that is, the one with the lowest unit).
RETURN VALUES
If it exists, the child device is returned, otherwise NULL.
