Merge branch 'i2c/for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

[cascardo/linux.git] / Documentation / devicetree / bindings / i2c / i2c-arb.txt

diff --git a/Documentation/devicetree/bindings/i2c/i2c-arb.txt b/Documentation/devicetree/bindings/i2c/i2c-arb.txt
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+Common i2c arbitration bus properties.
+
+- i2c-arb child node
+
+Required properties for the i2c-arb child node:
+- #address-cells = <1>;
+- #size-cells = <0>;
+
+Optional properties for i2c-arb child node:
+- Child nodes conforming to i2c bus binding
+
+
+Example :
+
+       /*
+          An NXP pca9541 I2C bus master selector at address 0x74
+          with a NXP pca8574 GPIO expander attached.
+        */
+
+       arb@74 {
+               compatible = "nxp,pca9541";
+               reg = <0x74>;
+
+               i2c-arb {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+
+                       gpio@38 {
+                               compatible = "nxp,pca8574";
+                               reg = <0x38>;
+                               #gpio-cells = <2>;
+                               gpio-controller;
+                       };
+               };
+       };