The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/iio/multiplexer/io-channel-mux.txt

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    1 I/O channel multiplexer bindings
    2 
    3 If a multiplexer is used to select which hardware signal is fed to
    4 e.g. an ADC channel, these bindings describe that situation.
    5 
    6 Required properties:
    7 - compatible : "io-channel-mux"
    8 - io-channels : Channel node of the parent channel that has multiplexed
    9                 input.
   10 - io-channel-names : Should be "parent".
   11 - #address-cells = <1>;
   12 - #size-cells = <0>;
   13 - mux-controls : Mux controller node to use for operating the mux
   14 - channels : List of strings, labeling the mux controller states.
   15 
   16 For each non-empty string in the channels property, an io-channel will
   17 be created. The number of this io-channel is the same as the index into
   18 the list of strings in the channels property, and also matches the mux
   19 controller state. The mux controller state is described in
   20 ../mux/mux-controller.txt
   21 
   22 Example:
   23         mux: mux-controller {
   24                 compatible = "gpio-mux";
   25                 #mux-control-cells = <0>;
   26 
   27                 mux-gpios = <&pioA 0 GPIO_ACTIVE_HIGH>,
   28                             <&pioA 1 GPIO_ACTIVE_HIGH>;
   29         };
   30 
   31         adc-mux {
   32                 compatible = "io-channel-mux";
   33                 io-channels = <&adc 0>;
   34                 io-channel-names = "parent";
   35 
   36                 mux-controls = <&mux>;
   37 
   38                 channels = "sync", "in", "system-regulator";
   39         };

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