/*
 * (C) Copyright 2007-2012
 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
 * Tom weidonghui <weidonghui@allwinnertech.com>
 */

#include "libfdt_env.h"

#include <fdt.h>
#include <libfdt.h>

#include "libfdt_internal.h"

int fdt_address_cells(const void *fdt, int nodeoffset)
{
	const fdt32_t *ac;
	int val;
	int len;

	ac = fdt_getprop(fdt, nodeoffset, "#address-cells", &len);
	if (!ac)
		return 2;

	if (len != sizeof(*ac))
		return -FDT_ERR_BADNCELLS;

	val = fdt32_to_cpu(*ac);
	if ((val <= 0) || (val > FDT_MAX_NCELLS))
		return -FDT_ERR_BADNCELLS;

	return val;
}

int fdt_size_cells(const void *fdt, int nodeoffset)
{
	const fdt32_t *sc;
	int val;
	int len;

	sc = fdt_getprop(fdt, nodeoffset, "#size-cells", &len);
	if (!sc)
		return 2;

	if (len != sizeof(*sc))
		return -FDT_ERR_BADNCELLS;

	val = fdt32_to_cpu(*sc);
	if ((val < 0) || (val > FDT_MAX_NCELLS))
		return -FDT_ERR_BADNCELLS;

	return val;
}