dt-bindings: mtd: add a common label property to all mtd devices

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

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

diff --git a/Documentation/devicetree/bindings/mtd/common.txt b/Documentation/devicetree/bindings/mtd/common.txt
new file mode 100644 (file)
index 0000000..fc068b9
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/common.txt
@@ -0,0 +1,15 @@
+* Common properties of all MTD devices
+
+Optional properties:
+- label: user-defined MTD device name. Can be used to assign user
+  friendly names to MTD devices (instead of the flash model or flash
+  controller based name) in order to ease flash device identification
+  and/or describe what they are used for.
+
+Example:
+
+       flash@0 {
+               label = "System-firmware";
+
+               /* flash type specific properties */
+       };