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      1 /*
      2  * libfdt - Flat Device Tree manipulation
      3  * Copyright (C) 2012 David Gibson, IBM Corporation.
      4  *
      5  * libfdt is dual licensed: you can use it either under the terms of
      6  * the GPL, or the BSD license, at your option.
      7  *
      8  *  a) This library is free software; you can redistribute it and/or
      9  *     modify it under the terms of the GNU General Public License as
     10  *     published by the Free Software Foundation; either version 2 of the
     11  *     License, or (at your option) any later version.
     12  *
     13  *     This library is distributed in the hope that it will be useful,
     14  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
     15  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     16  *     GNU General Public License for more details.
     17  *
     18  *     You should have received a copy of the GNU General Public
     19  *     License along with this library; if not, write to the Free
     20  *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
     21  *     MA 02110-1301 USA
     22  *
     23  * Alternatively,
     24  *
     25  *  b) Redistribution and use in source and binary forms, with or
     26  *     without modification, are permitted provided that the following
     27  *     conditions are met:
     28  *
     29  *     1. Redistributions of source code must retain the above
     30  *        copyright notice, this list of conditions and the following
     31  *        disclaimer.
     32  *     2. Redistributions in binary form must reproduce the above
     33  *        copyright notice, this list of conditions and the following
     34  *        disclaimer in the documentation and/or other materials
     35  *        provided with the distribution.
     36  *
     37  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
     38  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
     39  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     40  *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     41  *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     42  *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     43  *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     44  *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     45  *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     46  *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     47  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     48  *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
     49  *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     50  */
     51 #include "libfdt_env.h"
     52 
     53 #include <fdt.h>
     54 #include <libfdt.h>
     55 
     56 #include "libfdt_internal.h"
     57 
     58 int fdt_create_empty_tree(void *buf, int bufsize)
     59 {
     60 	int err;
     61 
     62 	err = fdt_create(buf, bufsize);
     63 	if (err)
     64 		return err;
     65 
     66 	err = fdt_finish_reservemap(buf);
     67 	if (err)
     68 		return err;
     69 
     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