设备树 demo

/dts-v1/;

/ {
    #address-cells = <1>;
    #size-cells = <1>;

    compatible = "acme,coyotes-revenge";

    cpus {
        #address-cells = <1>;
        #size-cells = <0>;
        cpu@0 {
            compatible = "arm,cortex-a9";
            reg = <0>;
        };
        cpu@1 {
            compatible = "arm,cortex-a9";
            reg = <1>;
        };
    };

    serial@101f0000 {
        compatible = "arm,pl011";
        reg = <0x101f0000 0x1000 >;
    };

    serial@101f2000 {
        compatible = "arm,pl011";
        reg = <0x101f2000 0x1000 >;
    };

    gpio@101f3000 {
        compatible = "arm,pl061";
        reg = <0x101f3000 0x1000
               0x101f4000 0x0010>;
    };

    interrupt-controller@10140000 {
        compatible = "arm,pl190";
        reg = <0x10140000 0x1000 >;
    };

    spi@10115000 {
        #address-cells = <1>;
        #size-cells = <0>;
        compatible = "arm,pl022";
        reg = <0x10115000 0x1000>;

        lcd: spi1@0 {
            compatible = "spi-bus";
            reg = <0>;
        };
    };

    demo_bus@3000000 {
        #address-cells = <1>;
        #size-cells = <1>;
        compatible = "simple-bus";
        /* 地址映射, localaddr parentaddr len  */
        ranges = <0x100 0x3000000 0x100>;

        device1@100 {
            compatible = "range";
            reg = <0x100 0x100>;
        };

        device2@200 {
            compatible = "range";
            reg = <0x200 0x400>;
        };
    };
};