/*
   * libfdt - Flat Device Tree manipulation
   * Copyright (C) 2006 David Gibson, IBM Corporation.
   *
   * libfdt is dual licensed: you can use it either under the terms of
   * the GPL, or the BSD license, at your option.
   *
   *  a) This library is free software; you can redistribute it and/or
   *     modify it under the terms of the GNU General Public License as
   *     published by the Free Software Foundation; either version 2 of the
   *     License, or (at your option) any later version.
   *
   *     This library is distributed in the hope that it will be useful,
   *     but WITHOUT ANY WARRANTY; without even the implied warranty of
   *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *     GNU General Public License for more details.
   *
   *     You should have received a copy of the GNU General Public
   *     License along with this library; if not, write to the Free
   *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
   *     MA 02110-1301 USA
   *
   * Alternatively,
   *
   *  b) Redistribution and use in source and binary forms, with or
   *     without modification, are permitted provided that the following
   *     conditions are met:
   *
   *     1. Redistributions of source code must retain the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer.
   *     2. Redistributions in binary form must reproduce the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer in the documentation and/or other materials
   *        provided with the distribution.
   *
   *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
   *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
   *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
   *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  #include "libfdt_env.h"
  
  #include <fdt.h>
  #include <libfdt.h>
  
  #include "libfdt_internal.h"
  
  int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
  			const void *val, int len)
  {
  	void *propval;
  	int proplen;
  
  	propval = fdt_getprop_w(fdt, nodeoffset, name, &proplen);
  	if (! propval)
  		return proplen;
  
  	if (proplen != len)
  		return -FDT_ERR_NOSPACE;
  
  	memcpy(propval, val, len);
  	return 0;
  }
  
  static void _fdt_nop_region(void *start, int len)
  {
  	fdt32_t *p;
  
  	for (p = start; (char *)p < ((char *)start + len); p++)
  		*p = cpu_to_fdt32(FDT_NOP);
  }
  
  int fdt_nop_property(void *fdt, int nodeoffset, const char *name)
  {
  	struct fdt_property *prop;
  	int len;
  
  	prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
  	if (! prop)
  		return len;
  
  	_fdt_nop_region(prop, len + sizeof(*prop));
  
  	return 0;
  }
  
  int _fdt_node_end_offset(void *fdt, int offset)
  {
  	int depth = 0;
  
  	while ((offset >= 0) && (depth >= 0))
  		offset = fdt_next_node(fdt, offset, &depth);
  
  	return offset;
  }
  
  int fdt_nop_node(void *fdt, int nodeoffset)
  {
  	int endoffset;
  
  	endoffset = _fdt_node_end_offset(fdt, nodeoffset);
  	if (endoffset < 0)
  		return endoffset;
  
  	_fdt_nop_region(fdt_offset_ptr_w(fdt, nodeoffset, 0),
  			endoffset - nodeoffset);
  	return 0;
  }