projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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, | |
| 9a310d21 SW |
23 | struct device_node *node, |
| 24 | struct mtd_partition **pparts) | |
| 25 | { | |
| 26 | const char *partname; | |
| 27 | struct device_node *pp; | |
| 28 | int nr_parts, i; | |
| 29 | ||
| 30 | /* First count the subnodes */ | |
| 31 | pp = NULL; | |
| 32 | nr_parts = 0; | |
| 33 | while ((pp = of_get_next_child(node, pp))) | |
| 34 | nr_parts++; | |
| 35 | ||
| 36 | if (nr_parts == 0) | |
| 37 | return 0; | |
| 38 | ||
| 39 | *pparts = kzalloc(nr_parts * sizeof(**pparts), GFP_KERNEL); | |
| 40 | if (!*pparts) | |
| 41 | return -ENOMEM; | |
| 42 | ||
| 43 | pp = NULL; | |
| 44 | i = 0; | |
| 45 | while ((pp = of_get_next_child(node, pp))) { | |
| 46 | const u32 *reg; | |
| 47 | int len; | |
| 48 | ||
| 49 | reg = of_get_property(pp, "reg", &len); | |
| 50 | if (!reg || (len != 2 * sizeof(u32))) { | |
| 51 | of_node_put(pp); | |
| 52 | dev_err(dev, "Invalid 'reg' on %s\n", node->full_name); | |
| 53 | kfree(*pparts); | |
| 54 | *pparts = NULL; | |
| 55 | return -EINVAL; | |
| 56 | } | |
| 57 | (*pparts)[i].offset = reg[0]; | |
| 58 | (*pparts)[i].size = reg[1]; | |
| 59 | ||
| 60 | partname = of_get_property(pp, "label", &len); | |
| 61 | if (!partname) | |
| 62 | partname = of_get_property(pp, "name", &len); | |
| 63 | (*pparts)[i].name = (char *)partname; | |
| 64 | ||
| 65 | if (of_get_property(pp, "read-only", &len)) | |
| 66 | (*pparts)[i].mask_flags = MTD_WRITEABLE; | |
| 67 | ||
| 68 | i++; | |
| 69 | } | |
| 70 | ||
| 71 | return nr_parts; | |
| 72 | } | |
| 73 | EXPORT_SYMBOL(of_mtd_parse_partitions); | |
| 950bcb25 AB |
74 | |
| 75 | MODULE_LICENSE("GPL"); |