Commit | Line | Data |
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9a310d21 SW |
1 | /* |
2 | * Flash partitions described by the OF (or flattened) device tree | |
3 | * | |
4 | * Copyright (C) 2006 MontaVista Software Inc. | |
5 | * Author: Vitaly Wool <vwool@ru.mvista.com> | |
6 | * | |
7 | * Revised to handle newer style flash binding by: | |
8 | * Copyright (C) 2007 David Gibson, IBM Corporation. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License as published by the | |
12 | * Free Software Foundation; either version 2 of the License, or (at your | |
13 | * option) any later version. | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/of.h> | |
19 | #include <linux/mtd/mtd.h> | |
20 | #include <linux/mtd/partitions.h> | |
21 | ||
22 | int __devinit of_mtd_parse_partitions(struct device *dev, | |
23 | struct mtd_info *mtd, | |
24 | struct device_node *node, | |
25 | struct mtd_partition **pparts) | |
26 | { | |
27 | const char *partname; | |
28 | struct device_node *pp; | |
29 | int nr_parts, i; | |
30 | ||
31 | /* First count the subnodes */ | |
32 | pp = NULL; | |
33 | nr_parts = 0; | |
34 | while ((pp = of_get_next_child(node, pp))) | |
35 | nr_parts++; | |
36 | ||
37 | if (nr_parts == 0) | |
38 | return 0; | |
39 | ||
40 | *pparts = kzalloc(nr_parts * sizeof(**pparts), GFP_KERNEL); | |
41 | if (!*pparts) | |
42 | return -ENOMEM; | |
43 | ||
44 | pp = NULL; | |
45 | i = 0; | |
46 | while ((pp = of_get_next_child(node, pp))) { | |
47 | const u32 *reg; | |
48 | int len; | |
49 | ||
50 | reg = of_get_property(pp, "reg", &len); | |
51 | if (!reg || (len != 2 * sizeof(u32))) { | |
52 | of_node_put(pp); | |
53 | dev_err(dev, "Invalid 'reg' on %s\n", node->full_name); | |
54 | kfree(*pparts); | |
55 | *pparts = NULL; | |
56 | return -EINVAL; | |
57 | } | |
58 | (*pparts)[i].offset = reg[0]; | |
59 | (*pparts)[i].size = reg[1]; | |
60 | ||
61 | partname = of_get_property(pp, "label", &len); | |
62 | if (!partname) | |
63 | partname = of_get_property(pp, "name", &len); | |
64 | (*pparts)[i].name = (char *)partname; | |
65 | ||
66 | if (of_get_property(pp, "read-only", &len)) | |
67 | (*pparts)[i].mask_flags = MTD_WRITEABLE; | |
68 | ||
69 | i++; | |
70 | } | |
71 | ||
72 | return nr_parts; | |
73 | } | |
74 | EXPORT_SYMBOL(of_mtd_parse_partitions); | |
950bcb25 AB |
75 | |
76 | MODULE_LICENSE("GPL"); |