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diff --git a/Documentation/devicetree/bindings/pwm/mxs-pwm.txt b/Documentation/devicetree/bindings/pwm/mxs-pwm.txt
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+Freescale MXS PWM controller
+
+Required properties:
+- compatible: should be "fsl,imx23-pwm"
+- reg: physical base address and length of the controller's registers
+- #pwm-cells: should be 2.  The first cell specifies the per-chip index
+  of the PWM to use and the second cell is the duty cycle in nanoseconds.
+- fsl,pwm-number: the number of PWM devices
+
+Example:
+
+pwm: pwm@80064000 {
+        compatible = "fsl,imx28-pwm", "fsl,imx23-pwm";
+        reg = <0x80064000 2000>;
+        #pwm-cells = <2>;
+        fsl,pwm-number = <8>;
+};