linux/Documentation/devicetree/bindings/pwm/imx-pwm.txt
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   1Freescale i.MX PWM controller
   2
   3Required properties:
   4- compatible: should be "fsl,<soc>-pwm"
   5- reg: physical base address and length of the controller's registers
   6- #pwm-cells: should be 2.  The first cell specifies the per-chip index
   7  of the PWM to use and the second cell is the period in nanoseconds.
   8- interrupts: The interrupt for the pwm controller
   9
  10Example:
  11
  12pwm1: pwm@53fb4000 {
  13        #pwm-cells = <2>;
  14        compatible = "fsl,imx53-pwm", "fsl,imx27-pwm";
  15        reg = <0x53fb4000 0x4000>;
  16        interrupts = <61>;
  17};
  18