freebsd-dev/share/man/man9/OF_child.9
Oleksandr Tymoshenko ac32b99c2b [man] Add documentation for OpenFirmware API
Add man pages for following OpenFirmware functions:

OF_child, OF_parent, OF_peer, OF_device_from_xref,
OF_device_register_xref, OF_xref_from_device, OF_getprop,
OF_getencprop, OF_getencprop_alloc, OF_getprop_alloc, OF_getproplen,
OF_hasprop, OF_nextprop, OF_prop_free, OF_searchencprop,
OF_searchprop, OF_setprop

Edited by:	wblock
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D14511
2018-04-09 22:23:45 +00:00

77 lines
2.3 KiB
Groff

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.Dd April 9, 2018
.Dt OF_CHILD 9
.Os
.Sh NAME
.Nm OF_child ,
.Nm OF_parent ,
.Nm OF_peer
.Nd navigate device tree
.Sh SYNOPSIS
.In dev/ofw/ofw_bus.h
.In dev/ofw/ofw_bus_subr.h
.Ft phandle_t
.Fn OF_child "phandle_t node"
.Ft phandle_t
.Fn OF_parent "phandle_t node"
.Ft phandle_t
.Fn OF_peer "phandle_t node"
.Sh DESCRIPTION
.Pp
.Fn OF_child
returns the phandle value of the first child of the
.Fa node .
Zero is returned if there are no child nodes.
.Pp
.Fn OF_parent
returns the phandle for the parent of the
.Fa node .
Zero is returned if
.Fa node
is the root node.
.Pp
.Fn OF_peer
returns the phandle value of the next sibling of the
.Fa node .
Zero is returned if there is no sibling node.
.Sh EXAMPLES
.Bd -literal
phandle_t node, child;
...
for (child = OF_child(node); child != 0; child = OF_peer(child) {
...
}
.Ed
.Sh SEE ALSO
.Xr OF_finddevice 9
.Sh AUTHORS
.An -nosplit
This manual page was written by
.An Oleksandr Tymoshenko Aq Mt gonzo@FreeBSD.org .