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diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-mmc.txt b/Documentation/devicetree/bindings/mmc/fsl-imx-mmc.txt
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+* Freescale Secure Digital Host Controller for i.MX2/3 series
+
+This file documents differences to the properties defined in mmc.txt.
+
+Required properties:
+- compatible : Should be "fsl,<chip>-mmc", chip can be imx21 or imx31
+
+Optional properties:
+- dmas: One DMA phandle with arguments as defined by the devicetree bindings
+        of the used DMA controller.
+- dma-names: Has to be "rx-tx".
+
+Example:
+
+sdhci1: sdhci@10014000 {
+        compatible = "fsl,imx27-mmc", "fsl,imx21-mmc";
+        reg = <0x10014000 0x1000>;
+        interrupts = <11>;
+        dmas = <&dma 7>;
+        dma-names = "rx-tx";
+        bus-width = <4>;
+        cd-gpios = <&gpio3 29>;
+        status = "okay";
+};