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diff --git a/Documentation/devicetree/bindings/siox/eckelmann,siox-gpio.txt b/Documentation/devicetree/bindings/siox/eckelmann,siox-gpio.txt
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+Eckelmann SIOX GPIO bus
+
+Required properties:
+- compatible : "eckelmann,siox-gpio"
+- din-gpios, dout-gpios, dclk-gpios, dld-gpios: references gpios for the
+ corresponding bus signals.
+
+Examples:
+
+ siox {
+ compatible = "eckelmann,siox-gpio";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_siox>;
+
+ din-gpios = <&gpio6 11 0>;
+ dout-gpios = <&gpio6 8 0>;
+ dclk-gpios = <&gpio6 9 0>;
+ dld-gpios = <&gpio6 10 0>;
+ };