Analog Devices ADG792A/G is a triple 4:1 mux.
Signed-off-by: Peter Rosin <peda@xxxxxxxxxx>
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.../devicetree/bindings/misc/mux-adg792a.txt | 82 ++++++++++++++++++++++
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+Bindings for Analog Devices ADG792A/G Triple 4:1 Multiplexers
+
+Required properties:
+- compatible : "adi,adg792a" or "adi,adg792g"
+- #mux-control-cells : <0> if parallel, or <1> if not.
+* Standard mux-controller bindings as decribed in mux-controller.txt
+
+Optional properties:
+- adi,parallel : if present, the three muxes are bound together with a single
+ mux controller, controlling all three muxes in parallel.
+- adi,idle-state : if present, array of states the three mux controllers will
+ have when idle (or, if parallel, a single idle-state).
+
+Mux controller states 0 through 3 correspond to signals A through D in the
+datasheet. Mux controller states 4 and 5 are only available as possible idle
+states. State 4 represents that nothing is connected, and state 5 represents
+that the mux controller keeps the mux in its previously selected state during
+the idle period. State 5 is the default idle state.
+
+Example:
+
+ /* three independent mux controllers (of which one is used) */
+ &i2c0 {
+ mux: adg792a@50 {
+ compatible = "adi,adg792a";
+ reg = <0x50>;
+ #mux-control-cells = <1>;
+ };
+ };
+
+ adc-mux {
+ compatible = "iio-mux";
+ io-channels = <&adc 0>;
+ io-channel-names = "parent";
+
+ mux-controls = <&mux 1>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ sync-1@0 {
+ reg = <0>;
+ };
+
+ in@2 {
+ reg = <2>;
+ };
+ };
+
+
+ /*
+ * Three parallel muxes with one mux controller, useful e.g. if
+ * the adc is differential, thus needing two signals to be muxed
+ * simultaneously for correct operation.
+ */
+ &i2c0 {
+ pmux: adg792a@50 {
+ compatible = "adi,adg792a";
+ reg = <0x50>;
+ #mux-control-cells = <0>;
+ adi,parallel;
+ };
+ };
+
+ diff-adc-mux {
+ compatible = "iio-mux";
+ io-channels = <&adc 0>;
+ io-channel-names = "parent";
+
+ mux-controls = <&pmux>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ sync-1@0 {
+ reg = <0>;
+ };
+
+ in@2 {
+ reg = <2>;
+ };
+ };
--
2.1.4
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