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diff --git a/Documentation/devicetree/bindings/rpmsg/imx-rpmsg.txt b/Documentation/devicetree/bindings/rpmsg/imx-rpmsg.txt
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+i.MX RPMSG platform implementations
+
+Required properties:
+- compatible : "fsl,imx7d-rpmsg", "fsl,imx6sx-rpmsg".
+  "fsl,rpmsg-bus", "simple-bus", "fsl,imx8qxp-rpmsg".
+  "fsl,imx8qm-rpmsg".
+- vdev-nums : The number of the remote virtual devices.
+- reg : The reserved DDR phisical memory used to store
+  vring descriptors.
+- multi-core-id: The id number of the remote processors.
+  And it is optional for the legacy platforms, since they
+  only have one remote processors.
+
+
+=====================================================================
+message unit module for RPMSG
+
+- mu_rpmsg : The message unit module used to do the communications
+  between the asymmetric cores.
+- compatible : "fsl,imx8mq-mu", "fsl,imx6sx-mu", "fsl,imx-mu-rpmsg1".
+  Different mu module would be used by the different remote processor.
+  The "fsl, imx6sx-mu" is used by the first remote processor.
+  The "fsl,imx-mu-rpmsg1" is used by the second remote process.
+- reg : Should contain MU registers location and length.
+- interrupts : interrupt mapping for RPMSG MU IRQ
+- interrupt-parent : A single value that points to the interrupt
+  parent to which the child domain is being mapped.
+  Value must be "&intmux_cm40" or "&intmux_cm41"
+
+Example:
+rpmsg: rpmsg{
+	compatible = "fsl,imx6sx-rpmsg";
+	status = "disabled";
+};
+
+&rpmsg{
+	vdev-nums = <1>;
+	reg = <0xbfff0000 0x10000>;
+	status = "okay";
+};
+
+imx_rpmsg: imx_rpmsg {
+	compatible = "fsl,rpmsg-bus", "simple-bus";
+	#address-cells = <2>;
+	#size-cells = <2>;
+	ranges;
+
+	mu_rpmsg: mu_rpmsg@37440000 {
+		compatible = "fsl,imx6sx-mu";
+		reg = <0x0 0x37440000 0x0 0x10000>;
+		interrupts = <31 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-parent = <&intmux_cm40>;
+		status = "okay";
+	};
+
+	rpmsg: rpmsg{
+		compatible = "fsl,imx8qxp-rpmsg";
+		status = "disabled";
+	};
+};