fdt_empty_tree.c revision 238737 
1169691Skan/*
2169691Skan * libfdt - Flat Device Tree manipulation
3169691Skan * Copyright (C) 2012 David Gibson, IBM Corporation.
4169691Skan *
5169691Skan * libfdt is dual licensed: you can use it either under the terms of
6169691Skan * the GPL, or the BSD license, at your option.
7169691Skan *
8169691Skan *  a) This library is free software; you can redistribute it and/or
9169691Skan *     modify it under the terms of the GNU General Public License as
10169691Skan *     published by the Free Software Foundation; either version 2 of the
11169691Skan *     License, or (at your option) any later version.
12169691Skan *
13169691Skan *     This library is distributed in the hope that it will be useful,
14169691Skan *     but WITHOUT ANY WARRANTY; without even the implied warranty of
15169691Skan *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16169691Skan *     GNU General Public License for more details.
17169691Skan *
18169691Skan *     You should have received a copy of the GNU General Public
19169691Skan *     License along with this library; if not, write to the Free
20169691Skan *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
21169691Skan *     MA 02110-1301 USA
22169691Skan *
23169691Skan * Alternatively,
24169691Skan *
25169691Skan *  b) Redistribution and use in source and binary forms, with or
26169691Skan *     without modification, are permitted provided that the following
27169691Skan *     conditions are met:
28169691Skan *
29169691Skan *     1. Redistributions of source code must retain the above
30169691Skan *        copyright notice, this list of conditions and the following
31169691Skan *        disclaimer.
32169691Skan *     2. Redistributions in binary form must reproduce the above
33169691Skan *        copyright notice, this list of conditions and the following
34169691Skan *        disclaimer in the documentation and/or other materials
35169691Skan *        provided with the distribution.
36169691Skan *
37169691Skan *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
38169691Skan *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
39169691Skan *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
40169691Skan *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
41169691Skan *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
42169691Skan *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43169691Skan *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44169691Skan *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45169691Skan *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46169691Skan *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
47169691Skan *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
48169691Skan *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
49169691Skan *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
50169691Skan */
51169691Skan#include "libfdt_env.h"
52169691Skan
53169691Skan#include <fdt.h>
54169691Skan#include <libfdt.h>
55169691Skan
56169691Skan#include "libfdt_internal.h"
57169691Skan
58169691Skanint fdt_create_empty_tree(void *buf, int bufsize)
59169691Skan{
60169691Skan	int err;
61169691Skan
62169691Skan	err = fdt_create(buf, bufsize);
63169691Skan	if (err)
64169691Skan		return err;
65169691Skan
66169691Skan	err = fdt_finish_reservemap(buf);
67169691Skan	if (err)
68169691Skan		return err;
69169691Skan
70	err = fdt_begin_node(buf, "");
71	if (err)
72		return err;
73
74	err =  fdt_end_node(buf);
75	if (err)
76		return err;
77
78	err = fdt_finish(buf);
79	if (err)
80		return err;
81
82	return fdt_open_into(buf, buf, bufsize);
83}
84
85