Analog Devices ADG792A/G is a triple 4:1 mux.
Acked-by: Jonathan Cameron <ji...@kernel.org>
Signed-off-by: Peter Rosin <p...@axentia.se>
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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 (the three muxes are bound together
+ with a single mux controller controlling all three muxes), or <1> if
+ not (one mux controller for each mux).
+* Standard mux-controller bindings as described in mux-controller.txt
+
+Optional properties for ADG792G:
+- gpio-controller : if present, #gpio-cells below is required.
+- #gpio-cells : should be <2>
+ - First cell is the GPO line number, i.e. 0 or 1
+ - Second cell is used to specify active high (0)
+ or active low (1)
+
+Optional properties:
+- idle-state : if present, array of states that the mux controllers will have
+ when idle. The special state MUX_IDLE_AS_IS is the default and
+ MUX_IDLE_DISCONNECT is also supported.
+
+States 0 through 3 correspond to signals A through D in the datasheet.
+
+Example:
+
+ /*
+ * Three independent mux controllers (of which one is used).
+ * Mux 0 is disconnected when idle, mux 1 idles in the previously
+ * selected state and mux 2 idles with signal B.
+ */
+ &i2c0 {
+ mux: mux-controller@50 {
+ compatible = "adi,adg792a";
+ reg = <0x50>;
+ #mux-control-cells = <1>;
+
+ idle-state = <MUX_IDLE_DISCONNECT MUX_IDLE_AS_IS 1>;
+ };
+ };
+
+ adc-mux {
+ compatible = "io-channel-mux";
+ io-channels = <&adc 0>;
+ io-channel-names = "parent";
+
+ mux-controls = <&mux 2>;
+
+ channels = "sync-1", "", "out";
+ };
+
+
+ /*
+ * 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: mux-controller@50 {
+ compatible = "adi,adg792a";
+ reg = <0x50>;
+ #mux-control-cells = <0>;
+
+ idle-state = <1>;
+ };
+ };
+
+ diff-adc-mux {
+ compatible = "io-channel-mux";
+ io-channels = <&adc 0>;
+ io-channel-names = "parent";
+
+ mux-controls = <&pmux>;
+
+ channels = "sync-1", "", "out";
+ };
--
2.1.4
