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.\" $FreeBSD$ 27.\" 28.Dd April 9, 2018 29.Dt OF_CHILD 9 30.Os 31.Sh NAME 32.Nm OF_child , 33.Nm OF_parent , 34.Nm OF_peer 35.Nd navigate device tree 36.Sh SYNOPSIS 37.In dev/ofw/ofw_bus.h 38.In dev/ofw/ofw_bus_subr.h 39.Ft phandle_t 40.Fn OF_child "phandle_t node" 41.Ft phandle_t 42.Fn OF_parent "phandle_t node" 43.Ft phandle_t 44.Fn OF_peer "phandle_t node" 45.Sh DESCRIPTION 46.Pp 47.Fn OF_child 48returns the phandle value of the first child of the 49.Fa node . 50Zero is returned if there are no child nodes. 51.Pp 52.Fn OF_parent 53returns the phandle for the parent of the 54.Fa node . 55Zero is returned if 56.Fa node 57is the root node. 58.Pp 59.Fn OF_peer 60returns the phandle value of the next sibling of the 61.Fa node . 62Zero is returned if there is no sibling node. 63.Sh EXAMPLES 64.Bd -literal 65phandle_t node, child; 66 ... 67for (child = OF_child(node); child != 0; child = OF_peer(child) { 68 ... 69} 70.Ed 71.Sh SEE ALSO 72.Xr OF_finddevice 9 73.Sh AUTHORS 74.An -nosplit 75This manual page was written by 76.An Oleksandr Tymoshenko Aq Mt gonzo@FreeBSD.org . 77