83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
/*
|
|
* Flash partitions described by the OF (or flattened) device tree
|
|
*
|
|
* Copyright © 2006 MontaVista Software Inc.
|
|
* Author: Vitaly Wool <vwool@ru.mvista.com>
|
|
*
|
|
* Revised to handle newer style flash binding by:
|
|
* Copyright © 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)))
|
|
nr_parts++;
|
|
|
|
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) {
|
|
nr_parts--;
|
|
continue;
|
|
}
|
|
|
|
(*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;
|
|
|
|
i++;
|
|
}
|
|
|
|
if (!i) {
|
|
of_node_put(pp);
|
|
dev_err(dev, "No valid partition found on %s\n", node->full_name);
|
|
kfree(*pparts);
|
|
*pparts = NULL;
|
|
return -EINVAL;
|
|
}
|
|
|
|
return nr_parts;
|
|
}
|
|
EXPORT_SYMBOL(of_mtd_parse_partitions);
|
|
|
|
MODULE_LICENSE("GPL");
|