hi3516dv500， 在uboot下能检测到usb，在kernel启动后检测不到，demo板插上也没有反应

可以参考一下《外围设备驱动 操作指南.pdf》

直接访问对应usb的管脚寄存器，看看是否设置为usb功能，没有复用为其他用途。

确认下host/device模式配置是否正确，host模式下才能检测到USB设备

需要在dts里面把模式改成host，包括init_mode和dr_mode

    usb30drd:usb30drd@0x10320000 {
            compatible = "wing-usb,drd";
            reg = <0x0 0x10320000 0x0 0x10000>;
            controller_id = <0>;
            support-drd;
            tx-thrcfg = <0x22080000>;
            rx-thrcfg = <0x22200000>;
            phys = <&usb2phy0>,<&usb3phy0>;
            phy-names = "usb2-phy", "usb3-phy";
            clocks = <&ups_clock PERI_CRG3664_USB30_CTRL0>;
            clock-names = "ctrl-clk";
            init_mode="host";
            status = "okay";
            ranges;
            #address-cells = <2>;
            #size-cells = <2>;
            dwc3@10320000{
                compatible = "snps,dwc3";
                reg = <0x0 0x10320000 0x0 0x10000>;
                interrupts = <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
                interrupt-names = "peripheral";
                maximum-speed = "super-speed";
                dr_mode = "host";
                usb-role-switch;
                snps,dis-u1-entry-quirk;
                snps,dis-u2-entry-quirk;
                snps,dis_u2_susphy_quirk;
                snps,dis_u3_susphy_quirk;
                linux,sysdev_is_parent;
                extcon = <&usb30drd>;
            };
        };