[PATCH v3 1/2] mtd: name the mtd device with an optional label property

["Cédric Le Goater" <clg-Bxea+6Xhats@public.gmane.org>]

This can be used to easily identify a specific chip on a system with
multiple chips.

Suggested-by: Boris Brezillon <boris.brezillon-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
Signed-off-by: Cédric Le Goater <clg-Bxea+6Xhats@public.gmane.org>
---

 Changes since v2:

 - only assign device name from label if mtd->name is undefined

 Changes since v1:

 - moved the use of the "label" property from mtd_set_dev_defaults()
   to mtd_set_of_node() to let drivers keep control on how mtd->name
   is set and allocated.

 include/linux/mtd/mtd.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 13f8052b9ff9..5a08ddff4f51 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -24,6 +24,7 @@
 #include <linux/uio.h>
 #include <linux/notifier.h>
 #include <linux/device.h>
+#include <linux/of.h>
 
 #include <mtd/mtd-abi.h>
 
@@ -385,6 +386,8 @@ static inline void mtd_set_of_node(struct mtd_info *mtd,
 				   struct device_node *np)
 {
 	mtd->dev.of_node = np;
+	if (!mtd->name)
+		of_property_read_string(np, "label", &mtd->name);
 }
 
 static inline struct device_node *mtd_get_of_node(struct mtd_info *mtd)
-- 
2.7.4

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