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

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Date:   Tue,  7 Mar 2017 09:26:03 +0100
From:   Alban <albeu@...e.fr>
To:     linux-kernel@...r.kernel.org
Cc:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>,
        Cyrille Pitchen <cyrille.pitchen@...el.com>,
        devicetree@...r.kernel.org, linux-mtd@...ts.infradead.org,
        Moritz Fischer <moritz.fischer@...us.com>,
        Alban <albeu@...e.fr>
Subject: [PATCH v2 1/2] doc: bindings: Add bindings documentation for mtd nvmem

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@...e.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@0 {
+		...
+
+		partition@2 {
+			label = "art";
+			reg = <0x7F0000 0x010000>;
+			read-only;
+
+			nvmem-provider;
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			eeprom@...0 {
+				label = "wmac-eeprom";
+				reg = <0x1000 0x1000>;
+			};
+		};
+	};
-- 
2.7.4