linux-kernel - [PATCH v5 4/9] dt-bindings: iio: iio-mux: document iio-mux bindings

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Message-ID: <1480414245-14034-5-git-send-email-peda@axentia.se>
Date:   Tue, 29 Nov 2016 11:10:40 +0100
From:   Peter Rosin <peda@...ntia.se>
To:     <linux-kernel@...r.kernel.org>
CC:     Peter Rosin <peda@...ntia.se>, Wolfram Sang <wsa@...-dreams.de>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Jonathan Corbet <corbet@....net>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-iio@...r.kernel.org>, <linux-doc@...r.kernel.org>
Subject: [PATCH v5 4/9] dt-bindings: iio: iio-mux: document iio-mux bindings

Signed-off-by: Peter Rosin <peda@...ntia.se>
---
 .../bindings/iio/multiplexer/iio-mux.txt           | 51 ++++++++++++++++++++++
 MAINTAINERS                                        |  6 +++
 2 files changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/multiplexer/iio-mux.txt

diff --git a/Documentation/devicetree/bindings/iio/multiplexer/iio-mux.txt b/Documentation/devicetree/bindings/iio/multiplexer/iio-mux.txt
new file mode 100644
index 000000000000..403912631dcf
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/multiplexer/iio-mux.txt
@@ -0,0 +1,51 @@
+IIO multiplexer bindings
+
+If a multiplexer is used to select which hardware signal is fed to
+e.g. an ADC channel, these bindings describe that situation.
+
+Required properties:
+- compatible : "iio-mux"
+- io-channels : Channel node of the parent channel that has multiplexed
+		input.
+- io-channel-names : Should be "parent".
+- #address-cells = <1>;
+- #size-cells = <0>;
+- mux-controls : Mux controller node to use for operating the mux
+
+Required properties for iio-mux child nodes:
+- reg : The multiplexer state as described in ../misc/mux-controller.txt
+
+For each iio-mux child, an iio channel will be created whose number will
+match the mux controller state.
+
+Example:
+	mux: mux-controller {
+		compatible = "mux-gpio";
+		#mux-control-cells = <0>;
+
+		mux-gpios = <&pioA 0 GPIO_ACTIVE_HIGH>,
+			    <&pioA 1 GPIO_ACTIVE_HIGH>;
+	};
+
+	adc-mux {
+		compatible = "iio-mux";
+		io-channels = <&adc 0>;
+		io-channel-names = "parent";
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		mux-controls = <&mux>;
+
+		sync@0 {
+			reg = <0>;
+		};
+
+		in@1 {
+			reg = <1>;
+		};
+
+		system-regulator@2 {
+			reg = <2>;
+		};
+	};
diff --git a/MAINTAINERS b/MAINTAINERS
index dc7498682752..77045ae15865 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6234,6 +6234,12 @@ F:	Documentation/ABI/testing/sysfs-bus-iio-adc-envelope-detector
 F:	Documentation/devicetree/bindings/iio/adc/envelope-detector.txt
 F:	drivers/iio/adc/envelope-detector.c
 
+IIO MULTIPLEXER
+M:	Peter Rosin <peda@...ntia.se>
+L:	linux-iio@...r.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/iio/multiplexer/iio-mux.txt
+
 IIO SUBSYSTEM AND DRIVERS
 M:	Jonathan Cameron <jic23@...nel.org>
 R:	Hartmut Knaack <knaack.h@....de>
-- 
2.1.4