From: Peter Rosin Date: Sun, 14 May 2017 19:51:13 +0000 (+0200) Subject: dt-bindings: mux-adg792a: document devicetree bindings for ADG792A/G mux X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f6689802eb7466c4a51b1ee8af021668a1b4fb13;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git dt-bindings: mux-adg792a: document devicetree bindings for ADG792A/G mux Analog Devices ADG792A/G is a triple 4:1 mux. Acked-by: Jonathan Cameron Reviewed-by: Rob Herring Signed-off-by: Peter Rosin Signed-off-by: Greg Kroah-Hartman --- diff --git a/Documentation/devicetree/bindings/mux/adi,adg792a.txt b/Documentation/devicetree/bindings/mux/adi,adg792a.txt new file mode 100644 index 000000000000..96b787a69f50 --- /dev/null +++ b/Documentation/devicetree/bindings/mux/adi,adg792a.txt @@ -0,0 +1,75 @@ +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 = ; + }; + }; + + 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"; + };