1Common i2c arbitration bus properties. 2 3- i2c-arb child node 4 5Required properties for the i2c-arb child node: 6- #address-cells = <1>; 7- #size-cells = <0>; 8 9Optional properties for i2c-arb child node: 10- Child nodes conforming to i2c bus binding 11 12 13Example : 14 15 /* 16 An NXP pca9541 I2C bus master selector at address 0x74 17 with a NXP pca8574 GPIO expander attached. 18 */ 19 20 arb@74 { 21 compatible = "nxp,pca9541"; 22 reg = <0x74>; 23 24 i2c-arb { 25 #address-cells = <1>; 26 #size-cells = <0>; 27 28 gpio@38 { 29 compatible = "nxp,pca8574"; 30 reg = <0x38>; 31 #gpio-cells = <2>; 32 gpio-controller; 33 }; 34 }; 35 }; 36