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Elixir Cross Referencer

 * Flash partitions described by the OF (or flattened) device tree
 * Copyright (C) 2006 MontaVista Software Inc.
 * Author: Vitaly Wool <>
 * Revised to handle newer style flash binding by:
 *   Copyright (C) 2007 David Gibson, IBM Corporation.
 * This program 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.

#include <linux/module.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/mtd/mtd.h>
#include <linux/slab.h>
#include <linux/mtd/partitions.h>

int __devinit of_mtd_parse_partitions(struct device *dev,
                                      struct device_node *node,
                                      struct mtd_partition **pparts)
	const char *partname;
	struct device_node *pp;
	int nr_parts, i;

	/* First count the subnodes */
	pp = NULL;
	nr_parts = 0;
	while ((pp = of_get_next_child(node, pp)))

	if (nr_parts == 0)
		return 0;

	*pparts = kzalloc(nr_parts * sizeof(**pparts), GFP_KERNEL);
	if (!*pparts)
		return -ENOMEM;

	pp = NULL;
	i = 0;
	while ((pp = of_get_next_child(node, pp))) {
		const u32 *reg;
		int len;

		reg = of_get_property(pp, "reg", &len);
		if (!reg) {

		(*pparts)[i].offset = reg[0];
		(*pparts)[i].size = reg[1];

		partname = of_get_property(pp, "label", &len);
		if (!partname)
			partname = of_get_property(pp, "name", &len);
		(*pparts)[i].name = (char *)partname;

		if (of_get_property(pp, "read-only", &len))
			(*pparts)[i].mask_flags = MTD_WRITEABLE;


	if (!i) {
		dev_err(dev, "No valid partition found on %s\n", node->full_name);
		*pparts = NULL;
		return -EINVAL;

	return nr_parts;