linux-kernel - [patch 2/7] dt: dtb version: document chosen/dtb-info node binding

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Date:	Wed, 18 Mar 2015 20:33:22 -0700
From:	Frank Rowand <frowand.list@...il.com>
To:	frowand.list@...il.com, Rob Herring <robh+dt@...nel.org>,
	Grant Likely <grant.likely@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	Michal Marek <mmarek@...e.cz>
CC:	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Leif Lindholm <leif.lindholm@...aro.org>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-kbuild@...r.kernel.org,
	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: [patch 2/7] dt: dtb version: document chosen/dtb-info node binding

From: Frank Rowand <frank.rowand@...ymobile.com>

Add /chosen/dtb-node binding.

Signed-off-by: Frank Rowand <frank.rowand@...ymobile.com>
---
 Documentation/devicetree/bindings/chosen.txt |   37 +++++++++++

Index: b/Documentation/devicetree/bindings/chosen.txt
===================================================================
--- a/Documentation/devicetree/bindings/chosen.txt
+++ b/Documentation/devicetree/bindings/chosen.txt
@@ -46,6 +46,43 @@ on PowerPC "stdout" if "stdout-path" is
 should only use the "stdout-path" property.
 
 
+dtb-info node
+----------------
+
+Information that describes where the device tree blob (DTB) came from and the
+environment it was created in.
+
+This node is normally created by including arch/arm/boot/dts/skeleton.dtsi,
+which includes include/dt-bindings/version.dtsi.
+
+Properties:
+
+version
+	The version of the DTB.  This is analagous to the linux kernel version.
+
+	This is a format free field intended for human consumption.  User space
+	programs should not have any expections about this property.
+
+	The DTB number in this property is incremented each time a make that
+	creates one or more DTBs is invoked.  If the make creates multiple
+	DTBs then this number is only incremented once.
+
+	The DTB number is stored in file .version_dtb.
+
+version-linux
+	The version of the linux kernel most recently built in the source
+	control system that contains the source used to build the DTB.
+
+	The linux kernel version number is not incremented for a make that
+	creates a DTB.
+
+dtb-path
+	The build directory relative path of the DTB.
+
+dts-path
+	The absolute path of the .dts file compiled to create the DTB.
+
+
 Properties documented in other bindings
 ---------------------------------------
 #address-cells                          video/simple-framebuffer-sunxi.txt
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