linux/Documentation/devicetree/bindings/pwm/nxp,pca9685-pwm.txt
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   1NXP PCA9685 16-channel 12-bit PWM LED controller
   2================================================
   3
   4Required properties:
   5  - compatible: "nxp,pca9685-pwm"
   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    The index 16 is the ALLCALL channel, that sets all PWM channels at the same
   9    time.
  10
  11Optional properties:
  12  - invert (bool): boolean to enable inverted logic
  13  - open-drain (bool): boolean to configure outputs with open-drain structure;
  14                       if omitted use totem-pole structure
  15
  16Example:
  17
  18For LEDs that are directly connected to the PCA, the following setting is
  19applicable:
  20
  21pca: pca@41 {
  22        compatible = "nxp,pca9685-pwm";
  23        #pwm-cells = <2>;
  24        reg = <0x41>;
  25        invert;
  26        open-drain;
  27};
  28