From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonathan Cameron Subject: Re: [PATCH v7 11/12] dt-bindings: mux-adg792a: document devicetree bindings for ADG792A/G mux Date: Sun, 8 Jan 2017 10:31:21 +0000 Message-ID: <05bcf023-f05e-5cdf-d812-f1e7f3bdd909@kernel.org> References: <1483532187-28494-1-git-send-email-peda@axentia.se> <1483532187-28494-12-git-send-email-peda@axentia.se> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1483532187-28494-12-git-send-email-peda@axentia.se> Sender: linux-i2c-owner@vger.kernel.org To: Peter Rosin , linux-kernel@vger.kernel.org Cc: Wolfram Sang , Rob Herring , Mark Rutland , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Jonathan Corbet , Arnd Bergmann , Greg Kroah-Hartman , linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-iio@vger.kernel.org, linux-doc@vger.kernel.org List-Id: devicetree@vger.kernel.org On 04/01/17 12:16, Peter Rosin wrote: > Analog Devices ADG792A/G is a triple 4:1 mux. > > Signed-off-by: Peter Rosin I think this is about as neat as we can make it. Acked-by: Jonathan Cameron > --- > .../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"; > + }; >