76 lines
1.9 KiB
Plaintext
76 lines
1.9 KiB
Plaintext
Bindings for Analog Devices ADG792A/G Triple 4:1 Multiplexers
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Required properties:
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- compatible : "adi,adg792a" or "adi,adg792g"
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- #mux-control-cells : <0> if parallel (the three muxes are bound together
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with a single mux controller controlling all three muxes), or <1> if
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not (one mux controller for each mux).
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* Standard mux-controller bindings as described in mux-controller.txt
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Optional properties for ADG792G:
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- gpio-controller : if present, #gpio-cells below is required.
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- #gpio-cells : should be <2>
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- First cell is the GPO line number, i.e. 0 or 1
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- Second cell is used to specify active high (0)
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or active low (1)
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Optional properties:
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- idle-state : if present, array of states that the mux controllers will have
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when idle. The special state MUX_IDLE_AS_IS is the default and
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MUX_IDLE_DISCONNECT is also supported.
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States 0 through 3 correspond to signals A through D in the datasheet.
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Example:
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/*
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* Three independent mux controllers (of which one is used).
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* Mux 0 is disconnected when idle, mux 1 idles in the previously
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* selected state and mux 2 idles with signal B.
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*/
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&i2c0 {
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mux: mux-controller@50 {
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compatible = "adi,adg792a";
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reg = <0x50>;
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#mux-control-cells = <1>;
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idle-state = <MUX_IDLE_DISCONNECT MUX_IDLE_AS_IS 1>;
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};
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};
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adc-mux {
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compatible = "io-channel-mux";
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io-channels = <&adc 0>;
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io-channel-names = "parent";
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mux-controls = <&mux 2>;
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channels = "sync-1", "", "out";
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};
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/*
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* Three parallel muxes with one mux controller, useful e.g. if
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* the adc is differential, thus needing two signals to be muxed
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* simultaneously for correct operation.
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*/
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&i2c0 {
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pmux: mux-controller@50 {
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compatible = "adi,adg792a";
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reg = <0x50>;
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#mux-control-cells = <0>;
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idle-state = <1>;
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};
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};
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diff-adc-mux {
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compatible = "io-channel-mux";
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io-channels = <&adc 0>;
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io-channel-names = "parent";
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mux-controls = <&pmux>;
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channels = "sync-1", "", "out";
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};
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