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diff --git a/kernel/Documentation/devicetree/bindings/powerpc/fsl/mem-ctrlr.txt b/kernel/Documentation/devicetree/bindings/powerpc/fsl/mem-ctrlr.txt
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+++ b/kernel/Documentation/devicetree/bindings/powerpc/fsl/mem-ctrlr.txt
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+Freescale DDR memory controller
+
+Properties:
+
+- compatible	: Should include "fsl,chip-memory-controller" where
+		  chip is the processor (bsc9132, mpc8572 etc.), or
+		  "fsl,qoriq-memory-controller".
+- reg		: Address and size of DDR controller registers
+- interrupts	: Error interrupt of DDR controller
+
+Example 1:
+
+	memory-controller@2000 {
+		compatible = "fsl,bsc9132-memory-controller";
+		reg = <0x2000 0x1000>;
+		interrupts = <16 2 1 8>;
+	};
+
+
+Example 2:
+
+	ddr1: memory-controller@8000 {
+		compatible = "fsl,qoriq-memory-controller-v4.7",
+				"fsl,qoriq-memory-controller";
+		reg = <0x8000 0x1000>;
+		interrupts = <16 2 1 23>;
+	};