rpi_spi-nand.dtsi

&gpio {
	spi0_pins: spi0_pins {
		brcm,pins = <9 10 11>;
		brcm,function = <4>; /* alt0 */
	};

	spi0_cs_pins: spi0_cs_pins {
		brcm,pins = <8 7>;
		brcm,function = <1>; /* output */
	};
};

&spi {
	//pinctrl-names = "default";
	//pinctrl-0 = <&spi0_pins &spi0_cs_pins>;
	cs-gpios = <&gpio 8 1>, <&gpio 7 1>;
	status = "okay";

	spi-nand@0 {
		compatible = "spi-nand";
		reg = <0>;
		spi-max-frequency = <1000000>;
	};
};