tjh.dev
Linux kernel mirror (for testing)
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1Binding for an external clock signal driven by a PWM pin.
2
3This binding uses the common clock binding[1] and the common PWM binding[2].
4
5[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
6[2] Documentation/devicetree/bindings/pwm/pwm.txt
7
8Required properties:
9- compatible : shall be "pwm-clock".
10- #clock-cells : from common clock binding; shall be set to 0.
11- pwms : from common PWM binding; this determines the clock frequency
12 via the period given in the PWM specifier.
13
14Optional properties:
15- clock-output-names : From common clock binding.
16- clock-frequency : Exact output frequency, in case the PWM period
17 is not exact but was rounded to nanoseconds.
18
19Example:
20 clock {
21 compatible = "pwm-clock";
22 #clock-cells = <0>;
23 clock-frequency = <25000000>;
24 clock-output-names = "mipi_mclk";
25 pwms = <&pwm2 0 40>; /* 1 / 40 ns = 25 MHz */
26 };