zynq linux挂载mcp2515无设备显示

Question

zynq启动后，dev/中和ifconfig -a都查找不到spi上的mcp2515,只有设备树里有显示，内核勾选过了mcp251x驱动选项，下面有我的设备树，请问这是什么原因？

/include/ "system-conf.dtsi"
#include <dt-bindings/gpio/gpio.h>

/ {

     compatible = "alientek,zynq-7020","xlnx,zynq-7000";

clocks {

            mcp2515_clock: mcp2515_clock {
                    compatible = "fixed-clock";
                    #clock-cells = <0>;
                    clock-frequency  = <8000000>; 
                    };

            };

regulators {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <0>;

    reg_can_3v3: regulator@0 {
        compatible = "regulator-fixed";
        reg = <0>;
        regulator-name = "can-3v3";
        regulator-min-microvolt = <3300000>;
        regulator-max-microvolt = <3300000>;
        //gpios = <&gpio_spi 3 GPIO_ACTIVE_LOW>;
    };

};

};

&spi0 {

is-decoded-cs = <0>;
num-cs = <2>;
status = "okay";

       mcp2515_can0: mcp2515@0 {
     compatible = "microchip,mcp2515";
    reg = <0>;
    spi-max-frequency = <2000000>;
    clocks = <&mcp2515_clock>;
    oscillator_frequency = <8000000>;
    interrupt-parent = <&gpio0>;
    interrupts = <54 0x2>;
    status = "okay";

    vdd-supply = <&reg_can_3v3>;
            xceiver-supply = <&reg_can_3v3>;

        };

   mcp2515_can1: mcp2515@1 {
     compatible = "microchip,mcp2515";
    reg = <1>;
    spi-max-frequency = <2000000>;
    clocks = <&mcp2515_clock>;
    oscillator_frequency = <8000000>;
    interrupt-parent = <&gpio0>;
    interrupts = <55 0x2>;
    status = "okay";

    vdd-supply = <&reg_can_3v3>;
    xceiver-supply = <&reg_can_3v3>;

        };

};