linux-kernel - [PATCH v3 2/3] doc: bindings: Add bindings documentation for mtd nvmem

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Date:   Sun, 25 Mar 2018 00:24:58 +0100
From:   Alban Bedel <albeu@...e.fr>
To:     linux-kernel@...r.kernel.org
Cc:     Alban Bedel <albeu@...e.fr>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        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@...ev4u.fr>,
        devicetree@...r.kernel.org, linux-mtd@...ts.infradead.org
Subject: [PATCH v3 2/3] 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 Bedel <albeu@...e.fr>
---
Changelog:
v2: * Added a "Required properties" section with the nvmem-provider
      property
v3: * Fixed my name in From and Signed-off-by
    * Moved to the new nvmem binding with the nvmem-cells subnode
---
 .../devicetree/bindings/nvmem/mtd-nvmem.txt        | 27 ++++++++++++++++++++++
 1 file changed, 27 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..c819a69
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/mtd-nvmem.txt
@@ -0,0 +1,27 @@
+= NVMEM in MTD =
+
+Config data for drivers, like MAC addresses, is often stored in MTD.
+An MTD device, or one of its partition, can be defined as a NVMEM provider
+by having an 'nvmem-cells' subnode as defined in nvmem.txt.
+
+Example:
+
+	flash@0 {
+		...
+
+		partition@2 {
+			label = "art";
+			reg = <0x7F0000 0x010000>;
+			read-only;
+
+			nvmem-cells {
+				compatible = "nvmem-cells";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				eeprom@...0 {
+					reg = <0x1000 0x1000>;
+				};
+			};
+		};
+	};
-- 
2.7.4