Documentation/devicetree/bindings/pwm/pwm-bcm2835.txt

   1 BCM2835 PWM controller (Raspberry Pi controller)
   2
   3 Required properties:
   4 - compatible: should be "brcm,bcm2835-pwm"
   5 - reg: physical base address and length of the controller's registers
   6 - clock: This clock defines the base clock frequency of the PWM hardware
   7   system, the period and the duty_cycle of the PWM signal is a multiple of
   8   the base period.
   9 - #pwm-cells: Should be 2. See pwm.txt in this directory for a description of
  10   the cells format.
  11
  12 Examples:
  13
  14 pwm@2020c000 {
  15         compatible = "brcm,bcm2835-pwm";
  16         reg = <0x2020c000 0x28>;
  17         clocks = <&clk_pwm>;
  18         #pwm-cells = <2>;
  19 };
  20
  21 clocks {
  22         ....
  23                 clk_pwm: pwm {
  24                         compatible = "fixed-clock";
  25                         reg = <3>;
  26                         #clock-cells = <0>;
  27                         clock-frequency = <9200000>;
  28                 };
  29         ....
  30 };