Kernel-3.10.0-957.el7_pwm-tiehrpw

TI SOC EHRPWM based PWM controller

Required properties:

• compatible: Must be “ti,-ehrpwm”.
  for am33xx - compatible = “ti,am33xx-ehrpwm”;
  for da850 - compatible = “ti,da850-ehrpwm”, “ti,am33xx-ehrpwm”;
• #pwm-cells: Should be 3. Number of cells being used to specify PWM property.
  First cell specifies the per-chip index of the PWM to use, the second
  cell is the period in nanoseconds and bit 0 in the third cell is used to
  encode the polarity of PWM output. Set bit 0 of the third in PWM specifier
  to 1 for inverse polarity & set to 0 for normal polarity.
• reg: physical base address and size of the registers map.

Optional properties:

• ti,hwmods: Name of the hwmod associated to the EHRPWM:
  “ehrpwm“, being the 0-based instance number from the HW spec

Example:

ehrpwm0: ehrpwm@0 { /* EHRPWM on am33xx */
compatible = “ti,am33xx-ehrpwm”;
#pwm-cells = <3>;
reg = <0x48300200 0x100>;
ti,hwmods = “ehrpwm0”;
};

ehrpwm0: ehrpwm@0 { /* EHRPWM on da850 */
compatible = “ti,da850-ehrpwm”, “ti,am33xx-ehrpwm”;
#pwm-cells = <3>;
reg = <0x300000 0x2000>;
};