spi-gpio-cs-overlay.dts

/dts-v1/;
/plugin/;

/ {
        compatible = "brcm,bcm2835", "brcm,bcm2836", "brcm,bcm2708", "brcm,bcm2709";

        fragment@0 {
                target = <&spi0_cs_pins>;
                frag0: __overlay__ {
                        brcm,pins = <8 7 21>;
                };
        };

        fragment@1 {
                target = <&spi0>;
                frag1: __overlay__ {
                        #address-cells = <1>;
                        #size-cells = <0>;

                        cs-gpios = <&gpio 8 1>, <&gpio 7 1>, <&gpio 21 1>;
                        status = "okay";

                        spidev0_2: spidev@2 {
                                compatible = "spidev";
                                reg = <2>;      /* CE2 */
                                #address-cells = <1>;
                                #size-cells = <0>;
                                spi-max-frequency = <125000000>;
                        };
                };
        };

        __overrides__ {
                cs0_pin  = <&frag0>,"brcm,pins:0",
                           <&frag1>,"cs-gpios:4";
                cs1_pin  = <&frag0>,"brcm,pins:4",
                           <&frag1>,"cs-gpios:16";
                cs2_pin  = <&frag0>,"brcm,pins:8",
                           <&frag1>,"cs-gpios:28";
                cs2_spidev = <&spidev0_2>, "status";
        };
};