1.\" 2.\" Copyright (c) 2018 Oleksandr Tymoshenko <gonzo@FreeBSD.org> 3.\" 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.Dd April 9, 2018 27.Dt OF_CHILD 9 28.Os 29.Sh NAME 30.Nm OF_child , 31.Nm OF_parent , 32.Nm OF_peer 33.Nd navigate device tree 34.Sh SYNOPSIS 35.In dev/ofw/ofw_bus.h 36.In dev/ofw/ofw_bus_subr.h 37.Ft phandle_t 38.Fn OF_child "phandle_t node" 39.Ft phandle_t 40.Fn OF_parent "phandle_t node" 41.Ft phandle_t 42.Fn OF_peer "phandle_t node" 43.Sh DESCRIPTION 44.Fn OF_child 45returns the phandle value of the first child of the 46.Fa node . 47Zero is returned if there are no child nodes. 48.Pp 49.Fn OF_parent 50returns the phandle for the parent of the 51.Fa node . 52Zero is returned if 53.Fa node 54is the root node. 55.Pp 56.Fn OF_peer 57returns the phandle value of the next sibling of the 58.Fa node . 59Zero is returned if there is no sibling node. 60.Sh EXAMPLES 61.Bd -literal 62phandle_t node, child; 63 ... 64for (child = OF_child(node); child != 0; child = OF_peer(child) { 65 ... 66} 67.Ed 68.Sh SEE ALSO 69.Xr OF_finddevice 9 70.Sh AUTHORS 71.An -nosplit 72This manual page was written by 73.An Oleksandr Tymoshenko Aq Mt gonzo@FreeBSD.org . 74