[PATCH v2 1/2] doc: bindings: Add bindings documentation for mtd nvmem

[Alban]

Config data for drivers, like MAC addresses, is often stored in MTD.
Add a binding that define how such data storage can be represented in
device tree.

Signed-off-by: Alban <albeu at free.fr>
---
Changelog:
v2: * Added a "Required properties" section with the nvmem-provider
      property
---
 .../devicetree/bindings/nvmem/mtd-nvmem.txt        | 33 ++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/mtd-nvmem.txt

diff --git a/Documentation/devicetree/bindings/nvmem/mtd-nvmem.txt b/Documentation/devicetree/bindings/nvmem/mtd-nvmem.txt
new file mode 100644
index 0000000..8ed25e6
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/mtd-nvmem.txt
@@ -0,0 +1,33 @@
+= NVMEM in MTD =
+
+Config data for drivers, like MAC addresses, is often stored in MTD.
+This binding define how such data storage can be represented in device tree.
+
+An MTD can be defined as an NVMEM provider by adding the `nvmem-provider`
+property to their node. Data cells can then be defined as child nodes
+of the partition as defined in nvmem.txt.
+
+Required properties:
+nvmem-provider:	Indicate that the device should be registered as
+		NVMEM provider
+
+Example:
+
+	flash at 0 {
+		...
+
+		partition at 2 {
+			label = "art";
+			reg = <0x7F0000 0x010000>;
+			read-only;
+
+			nvmem-provider;
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			eeprom at 1000 {
+				label = "wmac-eeprom";
+				reg = <0x1000 0x1000>;
+			};
+		};
+	};
-- 
2.7.4