// Definitions for an NXP PCF857X GPIO Extender /dts-v1/; /plugin/; /{ compatible = "brcm,bcm2835"; fragment@0 { target = <&i2c_arm>; __overlay__ { #address-cells = <1>; #size-cells = <0>; status = "okay"; pca8574: pca8574@20 { compatible = "nxp,pca8574"; gpio-controller; #gpio-cells = <2>; reg = <0x20>; status = "okay"; }; }; }; __overrides__ { addr = <&pca8574>,"reg:0"; }; };