/dts-v1/; /plugin/; / { compatible = "brcm,bcm2835"; fragment@0 { target = <&gpio>; __overlay__ { spi1_pins: spi1_pins { brcm,pins = <19 20 21>; brcm,function = <3>; /* alt4 */ }; spi1_cs_pins: spi1_cs_pins { brcm,pins = <18>; brcm,function = <1>; /* output */ }; }; }; fragment@1 { target = <&spi1>; frag1: __overlay__ { /* needed to avoid dtc warning */ #address-cells = <1>; #size-cells = <0>; pinctrl-names = "default"; pinctrl-0 = <&spi1_pins &spi1_cs_pins>; cs-gpios = <&gpio 18 1>; status = "okay"; spidev1_0: spidev@0 { compatible = "spidev"; reg = <0>; /* CE0 */ #address-cells = <1>; #size-cells = <0>; spi-max-frequency = <125000000>; status = "okay"; }; }; }; fragment@2 { target = <&aux>; __overlay__ { status = "okay"; }; }; __overrides__ { cs0_pin = <&spi1_cs_pins>,"brcm,pins:0", <&frag1>,"cs-gpios:4"; cs0_spidev = <&spidev1_0>,"status"; }; };