composite.txt

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    1 Binding for TI composite clock.
    2 
    3 Binding status: Unstable - ABI compatibility may be broken in the future
    4 
    5 This binding uses the common clock binding[1]. It assumes a
    6 register-mapped composite clock with multiple different sub-types;
    7 
    8 a multiplexer clock with multiple input clock signals or parents, one
    9 of which can be selected as output, this behaves exactly as [2]
   10 
   11 an adjustable clock rate divider, this behaves exactly as [3]
   12 
   13 a gating function which can be used to enable and disable the output
   14 clock, this behaves exactly as [4]
   15 
   16 The binding must provide a list of the component clocks that shall be
   17 merged to this clock. The component clocks shall be of one of the
   18 "ti,*composite*-clock" types.
   19 
   20 [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
   21 [2] Documentation/devicetree/bindings/clock/ti/mux.txt
   22 [3] Documentation/devicetree/bindings/clock/ti/divider.txt
   23 [4] Documentation/devicetree/bindings/clock/ti/gate.txt
   24 
   25 Required properties:
   26 - compatible : shall be: "ti,composite-clock"
   27 - clocks : link phandles of component clocks
   28 - #clock-cells : from common clock binding; shall be set to 0.
   29 
   30 Optional properties:
   31 - clock-output-names : from common clock binding.
   32 
   33 Examples:
   34 
   35 usb_l4_gate_ick: usb_l4_gate_ick {
   36         #clock-cells = <0>;
   37         compatible = "ti,composite-interface-clock";
   38         clocks = <&l4_ick>;
   39         ti,bit-shift = <5>;
   40         reg = <0x0a10>;
   41 };
   42 
   43 usb_l4_div_ick: usb_l4_div_ick {
   44         #clock-cells = <0>;
   45         compatible = "ti,composite-divider-clock";
   46         clocks = <&l4_ick>;
   47         ti,bit-shift = <4>;
   48         ti,max-div = <1>;
   49         reg = <0x0a40>;
   50         ti,index-starts-at-one;
   51 };
   52 
   53 usb_l4_ick: usb_l4_ick {
   54         #clock-cells = <0>;
   55         compatible = "ti,composite-clock";
   56         clocks = <&usb_l4_gate_ick>, <&usb_l4_div_ick>;
   57 };

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

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sys/contrib/device-tree/Bindings/clock/ti/composite.txt