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-rw-r--r--drivers/mtd/Kconfig8
-rw-r--r--drivers/mtd/Makefile1
-rw-r--r--drivers/mtd/maps/physmap_of.c89
-rw-r--r--drivers/mtd/ofpart.c74
4 files changed, 110 insertions, 62 deletions
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
index 661eac0..e850334 100644
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -150,6 +150,14 @@ config MTD_AFS_PARTS
for your particular device. It won't happen automatically. The
'armflash' map driver (CONFIG_MTD_ARMFLASH) does this, for example.
+config MTD_OF_PARTS
+ tristate "Flash partition map based on OF description"
+ depends on PPC_OF && MTD_PARTITIONS
+ help
+ This provides a partition parsing function which derives
+ the partition map from the children of the flash node,
+ as described in Documentation/powerpc/booting-without-of.txt.
+
comment "User Modules And Translation Layers"
config MTD_CHAR
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
index 7f0b04b..538e33d 100644
--- a/drivers/mtd/Makefile
+++ b/drivers/mtd/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_MTD_CONCAT) += mtdconcat.o
obj-$(CONFIG_MTD_REDBOOT_PARTS) += redboot.o
obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdlinepart.o
obj-$(CONFIG_MTD_AFS_PARTS) += afs.o
+obj-$(CONFIG_MTD_OF_PARTS) += ofpart.o
# 'Users' - code which presents functionality to userspace.
obj-$(CONFIG_MTD_CHAR) += mtdchar.o
diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c
index d4bcd3f..49acd41 100644
--- a/drivers/mtd/maps/physmap_of.c
+++ b/drivers/mtd/maps/physmap_of.c
@@ -80,65 +80,6 @@ static int parse_obsolete_partitions(struct of_device *dev,
return nr_parts;
}
-
-static int __devinit parse_partitions(struct of_flash *info,
- struct of_device *dev)
-{
- const char *partname;
- static const char *part_probe_types[]
- = { "cmdlinepart", "RedBoot", NULL };
- struct device_node *dp = dev->node, *pp;
- int nr_parts, i;
-
- /* First look for RedBoot table or partitions on the command
- * line, these take precedence over device tree information */
- nr_parts = parse_mtd_partitions(info->mtd, part_probe_types,
- &info->parts, 0);
- if (nr_parts > 0)
- return nr_parts;
-
- /* First count the subnodes */
- nr_parts = 0;
- for (pp = of_get_next_child(dp, NULL); pp;
- pp = of_get_next_child(dp, pp))
- nr_parts++;
-
- if (nr_parts == 0)
- return parse_obsolete_partitions(dev, info, dp);
-
- info->parts = kzalloc(nr_parts * sizeof(*info->parts),
- GFP_KERNEL);
- if (!info->parts)
- return -ENOMEM;
-
- for (pp = of_get_next_child(dp, NULL), i = 0; pp;
- pp = of_get_next_child(dp, pp), i++) {
- const u32 *reg;
- int len;
-
- reg = of_get_property(pp, "reg", &len);
- if (!reg || (len != 2*sizeof(u32))) {
- of_node_put(pp);
- dev_err(&dev->dev, "Invalid 'reg' on %s\n",
- dp->full_name);
- kfree(info->parts);
- info->parts = NULL;
- return -EINVAL;
- }
- info->parts[i].offset = reg[0];
- info->parts[i].size = reg[1];
-
- partname = of_get_property(pp, "label", &len);
- if (!partname)
- partname = of_get_property(pp, "name", &len);
- info->parts[i].name = (char *)partname;
-
- if (of_get_property(pp, "read-only", &len))
- info->parts[i].mask_flags = MTD_WRITEABLE;
- }
-
- return nr_parts;
-}
#else /* MTD_PARTITIONS */
#define OF_FLASH_PARTS(info) (0)
#define parse_partitions(info, dev) (0)
@@ -213,6 +154,10 @@ static struct mtd_info * __devinit obsolete_probe(struct of_device *dev,
static int __devinit of_flash_probe(struct of_device *dev,
const struct of_device_id *match)
{
+#ifdef CONFIG_MTD_PARTITIONS
+ static const char *part_probe_types[]
+ = { "cmdlinepart", "RedBoot", NULL };
+#endif
struct device_node *dp = dev->node;
struct resource res;
struct of_flash *info;
@@ -275,13 +220,33 @@ static int __devinit of_flash_probe(struct of_device *dev,
}
info->mtd->owner = THIS_MODULE;
- err = parse_partitions(info, dev);
+#ifdef CONFIG_MTD_PARTITIONS
+ /* First look for RedBoot table or partitions on the command
+ * line, these take precedence over device tree information */
+ err = parse_mtd_partitions(info->mtd, part_probe_types,
+ &info->parts, 0);
if (err < 0)
- goto err_out;
+ return err;
+
+#ifdef CONFIG_MTD_OF_PARTS
+ if (err == 0) {
+ err = of_mtd_parse_partitions(&dev->dev, info->mtd,
+ dp, &info->parts);
+ if (err < 0)
+ return err;
+ }
+#endif
+
+ if (err == 0) {
+ err = parse_obsolete_partitions(dev, info, dp);
+ if (err < 0)
+ return err;
+ }
if (err > 0)
- add_mtd_partitions(info->mtd, OF_FLASH_PARTS(info), err);
+ add_mtd_partitions(info->mtd, info->parts, err);
else
+#endif
add_mtd_device(info->mtd);
return 0;
diff --git a/drivers/mtd/ofpart.c b/drivers/mtd/ofpart.c
new file mode 100644
index 0000000..f86e069
--- /dev/null
+++ b/drivers/mtd/ofpart.c
@@ -0,0 +1,74 @@
+/*
+ * Flash partitions described by the OF (or flattened) device tree
+ *
+ * Copyright (C) 2006 MontaVista Software Inc.
+ * Author: Vitaly Wool <vwool@ru.mvista.com>
+ *
+ * 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/mtd/partitions.h>
+
+int __devinit of_mtd_parse_partitions(struct device *dev,
+ struct mtd_info *mtd,
+ 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 || (len != 2 * sizeof(u32))) {
+ of_node_put(pp);
+ dev_err(dev, "Invalid 'reg' on %s\n", node->full_name);
+ kfree(*pparts);
+ *pparts = NULL;
+ return -EINVAL;
+ }
+ (*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++;
+ }
+
+ return nr_parts;
+}
+EXPORT_SYMBOL(of_mtd_parse_partitions);
generated by cgit v1.1 at 2024-12-26 11:12:41 +0000