linux/Documentation/devicetree/bindings/pwm/spear-pwm.txt
<<
>>
Prefs
   1== ST SPEAr SoC PWM controller ==
   2
   3Required properties:
   4- compatible: should be one of:
   5  - "st,spear320-pwm"
   6  - "st,spear1340-pwm"
   7- reg: physical base address and length of the controller's registers
   8- #pwm-cells: number of cells used to specify PWM which is fixed to 2 on
   9  SPEAr. The first cell specifies the per-chip index of the PWM to use and
  10  the second cell is the period in nanoseconds.
  11
  12Example:
  13
  14        pwm: pwm@a8000000 {
  15            compatible ="st,spear320-pwm";
  16            reg = <0xa8000000 0x1000>;
  17            #pwm-cells = <2>;
  18        };
  19