summaryrefslogtreecommitdiffstats
path: root/drivers/mtd/ofpart.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2011-11-07 09:11:16 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-11-07 09:11:16 -0800
commite0d65113a70f1dc514e625cc4e7a7485a4bf72df (patch)
tree7320a130dc304623f5cf4b5dd8f67fb1776225ca /drivers/mtd/ofpart.c
parentcf5e15fbd72c13977720aa15b7b7e00e1d8fd8f2 (diff)
parent48e546b7f281f251893baa40769581fd15f085fb (diff)
Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (226 commits) mtd: tests: annotate as DANGEROUS in Kconfig mtd: tests: don't use mtd0 as a default mtd: clean up usage of MTD_DOCPROBE_ADDRESS jffs2: add compr=lzo and compr=zlib options jffs2: implement mount option parsing and compression overriding mtd: nand: initialize ops.mode mtd: provide an alias for the redboot module name mtd: m25p80: don't probe device which has status of 'disabled' mtd: nand_h1900 never worked mtd: Add DiskOnChip G3 support mtd: m25p80: add EON flash EN25Q32B into spi flash id table mtd: mark block device queue as non-rotational mtd: r852: make r852_pm_ops static mtd: m25p80: add support for at25df321a spi data flash mtd: mxc_nand: preset_v1_v2: unlock all NAND flash blocks mtd: nand: switch `check_pattern()' to standard `memcmp()' mtd: nand: invalidate cache on unaligned reads mtd: nand: do not scan bad blocks with NAND_BBT_NO_OOB set mtd: nand: wait to set BBT version mtd: nand: scrub BBT on ECC errors ... Fix up trivial conflicts: - arch/arm/mach-at91/board-usb-a9260.c Merged into board-usb-a926x.c - drivers/mtd/maps/lantiq-flash.c add_mtd_partitions -> mtd_device_register vs changed to use mtd_device_parse_register.
Diffstat (limited to 'drivers/mtd/ofpart.c')
-rw-r--r--drivers/mtd/ofpart.c112
1 files changed, 107 insertions, 5 deletions
diff --git a/drivers/mtd/ofpart.c b/drivers/mtd/ofpart.c
index a996718fa6b..64be8f0848b 100644
--- a/drivers/mtd/ofpart.c
+++ b/drivers/mtd/ofpart.c
@@ -20,14 +20,23 @@
#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)
+static int parse_ofpart_partitions(struct mtd_info *master,
+ struct mtd_partition **pparts,
+ struct mtd_part_parser_data *data)
{
+ struct device_node *node;
const char *partname;
struct device_node *pp;
int nr_parts, i;
+
+ if (!data)
+ return 0;
+
+ node = data->of_node;
+ if (!node)
+ return 0;
+
/* First count the subnodes */
pp = NULL;
nr_parts = 0;
@@ -69,7 +78,7 @@ int __devinit of_mtd_parse_partitions(struct device *dev,
if (!i) {
of_node_put(pp);
- dev_err(dev, "No valid partition found on %s\n", node->full_name);
+ pr_err("No valid partition found on %s\n", node->full_name);
kfree(*pparts);
*pparts = NULL;
return -EINVAL;
@@ -77,6 +86,99 @@ int __devinit of_mtd_parse_partitions(struct device *dev,
return nr_parts;
}
-EXPORT_SYMBOL(of_mtd_parse_partitions);
+
+static struct mtd_part_parser ofpart_parser = {
+ .owner = THIS_MODULE,
+ .parse_fn = parse_ofpart_partitions,
+ .name = "ofpart",
+};
+
+static int parse_ofoldpart_partitions(struct mtd_info *master,
+ struct mtd_partition **pparts,
+ struct mtd_part_parser_data *data)
+{
+ struct device_node *dp;
+ int i, plen, nr_parts;
+ const struct {
+ __be32 offset, len;
+ } *part;
+ const char *names;
+
+ if (!data)
+ return 0;
+
+ dp = data->of_node;
+ if (!dp)
+ return 0;
+
+ part = of_get_property(dp, "partitions", &plen);
+ if (!part)
+ return 0; /* No partitions found */
+
+ pr_warning("Device tree uses obsolete partition map binding: %s\n",
+ dp->full_name);
+
+ nr_parts = plen / sizeof(part[0]);
+
+ *pparts = kzalloc(nr_parts * sizeof(*(*pparts)), GFP_KERNEL);
+ if (!pparts)
+ return -ENOMEM;
+
+ names = of_get_property(dp, "partition-names", &plen);
+
+ for (i = 0; i < nr_parts; i++) {
+ (*pparts)[i].offset = be32_to_cpu(part->offset);
+ (*pparts)[i].size = be32_to_cpu(part->len) & ~1;
+ /* bit 0 set signifies read only partition */
+ if (be32_to_cpu(part->len) & 1)
+ (*pparts)[i].mask_flags = MTD_WRITEABLE;
+
+ if (names && (plen > 0)) {
+ int len = strlen(names) + 1;
+
+ (*pparts)[i].name = (char *)names;
+ plen -= len;
+ names += len;
+ } else {
+ (*pparts)[i].name = "unnamed";
+ }
+
+ part++;
+ }
+
+ return nr_parts;
+}
+
+static struct mtd_part_parser ofoldpart_parser = {
+ .owner = THIS_MODULE,
+ .parse_fn = parse_ofoldpart_partitions,
+ .name = "ofoldpart",
+};
+
+static int __init ofpart_parser_init(void)
+{
+ int rc;
+ rc = register_mtd_parser(&ofpart_parser);
+ if (rc)
+ goto out;
+
+ rc = register_mtd_parser(&ofoldpart_parser);
+ if (!rc)
+ return 0;
+
+ deregister_mtd_parser(&ofoldpart_parser);
+out:
+ return rc;
+}
+
+module_init(ofpart_parser_init);
MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Parser for MTD partitioning information in device tree");
+MODULE_AUTHOR("Vitaly Wool, David Gibson");
+/*
+ * When MTD core cannot find the requested parser, it tries to load the module
+ * with the same name. Since we provide the ofoldpart parser, we should have
+ * the corresponding alias.
+ */
+MODULE_ALIAS("ofoldpart");