This patch adds a flags argument to the of_find_path() function. The only flag
defined for now is OF_FIND_PATH_FLAGS_BB. When used on NAND devices, the
function returns the bad block aware device (the ".bb" device).
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
drivers/misc/state.c | 2 +-
drivers/of/barebox.c | 20 +-------------------
drivers/of/of_path.c | 12 ++++++++++--
include/of.h | 3 ++-
4 files changed, 14 insertions(+), 23 deletions(-)
diff --git a/drivers/misc/state.c b/drivers/misc/state.c
index f066a836cb93..3b07bb93d725 100644
--- a/drivers/misc/state.c
+++ b/drivers/misc/state.c
@@ -41,7 +41,7 @@ static int state_probe(struct device_d *dev)
if (IS_ERR(state))
return PTR_ERR(state);
- ret = of_find_path(np, "backend", &path);
+ ret = of_find_path(np, "backend", &path, 0);
if (ret)
return ret;
diff --git a/drivers/of/barebox.c b/drivers/of/barebox.c
index 0220bc6b3123..1b3078eb4757 100644
--- a/drivers/of/barebox.c
+++ b/drivers/of/barebox.c
@@ -31,28 +31,10 @@ static int environment_probe(struct device_d *dev)
char *path;
int ret;
- ret = of_find_path(dev->device_node, "device-path", &path);
+ ret = of_find_path(dev->device_node, "device-path", &path, OF_FIND_PATH_FLAGS_BB);
if (ret)
return ret;
- /*
- * The environment support is not bad block aware, hence we
- * have to use the .bb device. Test if we have a nand device
- * and if yes, append .bb to the filename.
- */
- if (!strncmp(path, "/dev/", 5)) {
- struct cdev *cdev;
- char *cdevname;
-
- cdevname = path + 5;
- cdev = cdev_by_name(cdevname);
- if (cdev && cdev->mtd && mtd_can_have_bb(cdev->mtd)) {
- char *bbpath = asprintf("%s.bb", path);
- free(path);
- path = bbpath;
- }
- }
-
dev_info(dev, "setting default environment path to %s\n", path);
default_environment_path_set(path);
diff --git a/drivers/of/of_path.c b/drivers/of/of_path.c
index df63c5782a02..2dc784851de8 100644
--- a/drivers/of/of_path.c
+++ b/drivers/of/of_path.c
@@ -21,6 +21,8 @@
#include <malloc.h>
#include <of.h>
+#include <linux/mtd/mtd.h>
+
struct of_path {
struct cdev *cdev;
struct device_d *dev;
@@ -112,6 +114,7 @@ out:
* @propname: the property name of the path description
* @outpath: if this function returns 0 outpath will contain the path belonging
* to the input path description. Must be freed with free().
+ * @flags: use OF_FIND_PATH_FLAGS_BB to return the .bb device if available
*
* paths in the devicetree have the form of a multistring property. The first
* string contains the full path to the physical device containing the path.
@@ -127,11 +130,12 @@ out:
* device-path = &mmc0, "partname:0";
* device-path = &norflash, "partname:barebox-environment";
*/
-int of_find_path(struct device_node *node, const char *propname, char **outpath)
+int of_find_path(struct device_node *node, const char *propname, char **outpath, unsigned flags)
{
struct of_path op = {};
struct device_node *rnode;
const char *path, *str;
+ bool add_bb = false;
int i, ret;
path = of_get_property(node, propname, NULL);
@@ -166,7 +170,11 @@ int of_find_path(struct device_node *node, const char *propname, char **outpath)
if (!op.cdev)
return -ENOENT;
- *outpath = asprintf("/dev/%s", op.cdev->name);
+ if ((flags & OF_FIND_PATH_FLAGS_BB) && op.cdev->mtd &&
+ mtd_can_have_bb(op.cdev->mtd))
+ add_bb = true;
+
+ *outpath = asprintf("/dev/%s%s", op.cdev->name, add_bb ? ".bb" : "");
return 0;
}
diff --git a/include/of.h b/include/of.h
index 7235138f30bf..2dcb613a77ba 100644
--- a/include/of.h
+++ b/include/of.h
@@ -240,7 +240,8 @@ int of_add_memory(struct device_node *node, bool dump);
void of_add_memory_bank(struct device_node *node, bool dump, int r,
u64 base, u64 size);
struct device_d *of_find_device_by_node_path(const char *path);
-int of_find_path(struct device_node *node, const char *propname, char **outpath);
+#define OF_FIND_PATH_FLAGS_BB 1 /* return .bb device if available */
+int of_find_path(struct device_node *node, const char *propname, char **outpath, unsigned flags);
int of_register_fixup(int (*fixup)(struct device_node *, void *), void *context);
struct device_node *of_find_node_by_alias(struct device_node *root,
const char *alias);
--
2.1.4
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