| Message ID | 1483532187-28494-12-git-send-email-peda@axentia.se |
|---|---|
| State | Awaiting Upstream |
| Headers | show |
On 04/01/17 12:16, Peter Rosin wrote: > Analog Devices ADG792A/G is a triple 4:1 mux. > > Signed-off-by: Peter Rosin <peda@axentia.se> I think this is about as neat as we can make it. Acked-by: Jonathan Cameron <jic23@kernel.org> > --- > .../devicetree/bindings/mux/mux-adg792a.txt | 79 ++++++++++++++++++++++ > 1 file changed, 79 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mux/mux-adg792a.txt > > diff --git a/Documentation/devicetree/bindings/mux/mux-adg792a.txt b/Documentation/devicetree/bindings/mux/mux-adg792a.txt > new file mode 100644 > index 000000000000..0b26dd11f070 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mux/mux-adg792a.txt > @@ -0,0 +1,79 @@ > +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 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: > +- 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 2-tuples with mux controller number > + and state that mux controllers will have when idle. States 0 through 3 > + correspond to signals A through D in the datasheet. > +- adi,idle-high-impedance : if present, array of mux controller numbers that > + should be in the disconnected high-impedance state when idle. > + > +Mux controller states 0 through 3 correspond to signals A through D in the > +datasheet. If a mux controller is mentioned in neither adi,idle-state nor > +adi,idle-high-impedance it is left in its previously selected state when idle. > + > +Example: > + > + /* > + * Three independent mux controllers (of which one is used). > + * Mux 0 is disconnected when idle, mux 1 idles with signal C > + * and mux 2 idles with signal A. > + */ > + &i2c0 { > + mux: adg792a@50 { > + compatible = "adi,adg792a"; > + reg = <0x50>; > + #mux-control-cells = <1>; > + > + adi,idle-high-impedance = <0>; > + adi,idle-state = <1 2>, <2 0>; > + }; > + }; > + > + adc-mux { > + compatible = "io-channel-mux"; > + io-channels = <&adc 0>; > + io-channel-names = "parent"; > + > + mux-controls = <&mux 1>; > + > + 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: adg792a@50 { > + compatible = "adi,adg792a"; > + reg = <0x50>; > + #mux-control-cells = <0>; > + adi,parallel; > + }; > + }; > + > + diff-adc-mux { > + compatible = "io-channel-mux"; > + io-channels = <&adc 0>; > + io-channel-names = "parent"; > + > + mux-controls = <&pmux>; > + > + channels = "sync-1", "", "out"; > + }; > -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/mux/mux-adg792a.txt b/Documentation/devicetree/bindings/mux/mux-adg792a.txt new file mode 100644 index 000000000000..0b26dd11f070 --- /dev/null +++ b/Documentation/devicetree/bindings/mux/mux-adg792a.txt @@ -0,0 +1,79 @@ +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 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: +- 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 2-tuples with mux controller number + and state that mux controllers will have when idle. States 0 through 3 + correspond to signals A through D in the datasheet. +- adi,idle-high-impedance : if present, array of mux controller numbers that + should be in the disconnected high-impedance state when idle. + +Mux controller states 0 through 3 correspond to signals A through D in the +datasheet. If a mux controller is mentioned in neither adi,idle-state nor +adi,idle-high-impedance it is left in its previously selected state when idle. + +Example: + + /* + * Three independent mux controllers (of which one is used). + * Mux 0 is disconnected when idle, mux 1 idles with signal C + * and mux 2 idles with signal A. + */ + &i2c0 { + mux: adg792a@50 { + compatible = "adi,adg792a"; + reg = <0x50>; + #mux-control-cells = <1>; + + adi,idle-high-impedance = <0>; + adi,idle-state = <1 2>, <2 0>; + }; + }; + + adc-mux { + compatible = "io-channel-mux"; + io-channels = <&adc 0>; + io-channel-names = "parent"; + + mux-controls = <&mux 1>; + + 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: adg792a@50 { + compatible = "adi,adg792a"; + reg = <0x50>; + #mux-control-cells = <0>; + adi,parallel; + }; + }; + + diff-adc-mux { + compatible = "io-channel-mux"; + io-channels = <&adc 0>; + io-channel-names = "parent"; + + mux-controls = <&pmux>; + + channels = "sync-1", "", "out"; + };
Analog Devices ADG792A/G is a triple 4:1 mux. Signed-off-by: Peter Rosin <peda@axentia.se> --- .../devicetree/bindings/mux/mux-adg792a.txt | 79 ++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 Documentation/devicetree/bindings/mux/mux-adg792a.txt