Helper code to probe mtd partitions from the devicetree.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
drivers/of/Makefile | 1 +
drivers/of/partition.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++
include/of.h | 9 +++++++
3 files changed, 74 insertions(+)
create mode 100644 drivers/of/partition.c
diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index b38d40b..c14aaec 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -1,2 +1,3 @@
obj-y += base.o
obj-y += gpio.o
+obj-y += partition.o
diff --git a/drivers/of/partition.c b/drivers/of/partition.c
new file mode 100644
index 0000000..6a57a60
--- /dev/null
+++ b/drivers/of/partition.c
@@ -0,0 +1,64 @@
+/*
+ * partition.c - devicetree partition parsing
+ *
+ * Copyright (c) 2012 Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>, Pengutronix
+ *
+ * based on Linux devicetree support
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <common.h>
+#include <of.h>
+#include <malloc.h>
+#include <linux/mtd/mtd.h>
+
+int of_parse_partitions(const char *cdevname,
+ struct device_node *node)
+{
+ struct device_node *n;
+ const char *partname;
+ char *filename;
+
+ device_node_for_nach_child(node, n) {
+ const __be32 *reg;
+ unsigned long offset, size;
+ const char *name;
+ int len;
+ unsigned long flags = 0;
+
+ reg = of_get_property(n, "reg", &len);
+ if (!reg)
+ continue;
+
+ offset = be32_to_cpu(reg[0]);
+ size = be32_to_cpu(reg[1]);
+
+ partname = of_get_property(n, "label", &len);
+ if (!partname)
+ partname = of_get_property(n, "name", &len);
+ name = (char *)partname;
+
+ debug("add partition: %s.%s 0x%08lx 0x%08lx\n", cdevname, partname, offset, size);
+
+ if (of_get_property(n, "read-only", &len))
+ flags = DEVFS_PARTITION_READONLY;
+
+ filename = asprintf("%s.%s", cdevname, partname);
+
+ devfs_add_partition(cdevname, offset, size, flags, filename);
+
+ free(filename);
+ }
+
+ return 0;
+}
diff --git a/include/of.h b/include/of.h
index 762df9d..7b6a23a 100644
--- a/include/of.h
+++ b/include/of.h
@@ -109,9 +109,18 @@ int of_probe(void);
int of_parse_dtb(struct fdt_header *fdt);
#ifdef CONFIG_OFDEVICE
+int of_parse_partitions(const char *cdevname,
+ struct device_node *node);
+
struct device_node *of_get_root_node(void);
int of_alias_get_id(struct device_node *np, const char *stem);
#else
+static inline int of_parse_partitions(const char *cdevname,
+ struct device_node *node)
+{
+ return -EINVAL;
+}
+
static inline struct device_node *of_get_root_node(void)
{
return NULL;
--
1.7.10.4
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