Signed-off-by: Peter Rosin <peda@xxxxxxxxxx>
---
.../devicetree/bindings/mux/mux-controller.txt | 26 ++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/Documentation/devicetree/bindings/mux/mux-controller.txt b/Documentation/devicetree/bindings/mux/mux-controller.txt
index 42b2177e5ae1..4e89df8b2392 100644
--- a/Documentation/devicetree/bindings/mux/mux-controller.txt
+++ b/Documentation/devicetree/bindings/mux/mux-controller.txt
@@ -125,3 +125,29 @@ An example mux controller might look like this:
reg = <0x50>;
#mux-control-cells = <1>;
};
+
+
+Combinded controller and consumer of a GPIO mux
+-----------------------------------------------
+
+For the common case of a single consumer of a GPIO controlled mux, there is
+a simplified binding which will instantiate an implicit mux controller. Just
+specify a mux-gpios property with the same interpretation as in mux-gpio.txt.
+Note that other properties described in mux-gpio.txt are not available in
+this simplified form and that the mux controller is unnamed. If you need
+more than one mux controller, a shared mux controller or if you need a
+specific idle-state, use the more flexible binding with the mux controller
+in its own node.
+
+Example:
+
+ adc-mux {
+ compatible = "io-channel-mux";
+ io-channels = <&adc 0>;
+ io-channel-names = "parent";
+
+ mux-gpios = <&pioA 0 GPIO_ACTIVE_HIGH>,
+ <&pioA 1 GPIO_ACTIVE_HIGH>;
+
+ channels = "sync-1", "in", "out", "sync-2";
+ };
--
2.1.4
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