Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt

   1 TI SOC EHRPWM based PWM controller
   2
   3 Required properties:
   4 - compatible: Must be "ti,<soc>-ehrpwm".
   5   for am33xx - compatible = "ti,am33xx-ehrpwm";
   6   for da850  - compatible = "ti,da850-ehrpwm", "ti,am33xx-ehrpwm";
   7 - #pwm-cells: Should be 3. Number of cells being used to specify PWM property.
   8   First cell specifies the per-chip index of the PWM to use, the second
   9   cell is the period in nanoseconds and bit 0 in the third cell is used to
  10   encode the polarity of PWM output. Set bit 0 of the third in PWM specifier
  11   to 1 for inverse polarity & set to 0 for normal polarity.
  12 - reg: physical base address and size of the registers map.
  13
  14 Optional properties:
  15 - ti,hwmods: Name of the hwmod associated to the EHRPWM:
  16   "ehrpwm<x>", <x> being the 0-based instance number from the HW spec
  17
  18 Example:
  19
  20 ehrpwm0: ehrpwm@0 { /* EHRPWM on am33xx */
  21         compatible = "ti,am33xx-ehrpwm";
  22         #pwm-cells = <3>;
  23         reg = <0x48300200 0x100>;
  24         ti,hwmods = "ehrpwm0";
  25 };
  26
  27 ehrpwm0: ehrpwm@0 { /* EHRPWM on da850 */
  28         compatible = "ti,da850-ehrpwm", "ti,am33xx-ehrpwm";
  29         #pwm-cells = <3>;
  30         reg = <0x300000 0x2000>;
  31 };