FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/clock/pwm-clock.txt

     Binding for an external clock signal driven by a PWM pin.
     
     This binding uses the common clock binding[1] and the common PWM binding[2].
     
     [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
     [2] Documentation/devicetree/bindings/pwm/pwm.txt
     
     Required properties:
     - compatible : shall be "pwm-clock".
    - #clock-cells : from common clock binding; shall be set to 0.
    - pwms : from common PWM binding; this determines the clock frequency
      via the period given in the PWM specifier.
    
    Optional properties:
    - clock-output-names : From common clock binding.
    - clock-frequency : Exact output frequency, in case the PWM period
      is not exact but was rounded to nanoseconds.
    
    Example:
            clock {
                    compatible = "pwm-clock";
                    #clock-cells = <0>;
                    clock-frequency = <25000000>;
                    clock-output-names = "mipi_mclk";
                    pwms = <&pwm2 0 40>; /* 1 / 40 ns = 25 MHz */
            };

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