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Linux/scripts/dtc/libfdt/fdt_empty_tree.c

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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 
 85 

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