linux/Documentation/devicetree/bindings/pwm/ti,twl-pwmled.txt
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   1Texas Instruments TWL series PWM drivers connected to LED terminals
   2
   3Supported PWMs:
   4On TWL4030 series: PWMA and PWMB (connected to LEDA and LEDB terminals)
   5On TWL6030 series: LED PWM (mainly used as charging indicator LED)
   6
   7Required properties:
   8- compatible: "ti,twl4030-pwmled" or "ti,twl6030-pwmled"
   9- #pwm-cells: should be 2.  The first cell specifies the per-chip index
  10  of the PWM to use and the second cell is the period in nanoseconds.
  11
  12Example:
  13
  14twl_pwmled: pwmled {
  15        compatible = "ti,twl6030-pwmled";
  16        #pwm-cells = <2>;
  17};
  18