linux/Documentation/devicetree/bindings/i2c/i2c-cbus-gpio.txt
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   1Device tree bindings for i2c-cbus-gpio driver
   2
   3Required properties:
   4        - compatible = "i2c-cbus-gpio";
   5        - gpios: clk, dat, sel
   6        - #address-cells = <1>;
   7        - #size-cells = <0>;
   8
   9Optional properties:
  10        - child nodes conforming to i2c bus binding
  11
  12Example:
  13
  14i2c@0 {
  15        compatible = "i2c-cbus-gpio";
  16        gpios = <&gpio 66 0 /* clk */
  17                 &gpio 65 0 /* dat */
  18                 &gpio 64 0 /* sel */
  19                >;
  20        #address-cells = <1>;
  21        #size-cells = <0>;
  22
  23        retu-mfd: retu@1 {
  24                compatible = "retu-mfd";
  25                reg = <0x1>;
  26        };
  27};
  28