我们制作了一个新的电路板，使用了am5728芯片，使用tusb4041i来扩展usb2.0接口。

我没有对内核进行任何关于usb配置方面的修改。

下面是板子启动的打印信息：

[ 76.654585] usbcore: regstered new interface driver usbfs

[ 76.660739] usbcore: registered new interface driver hub

[ OK ] Reached target Sound Card.[ 76.660824] usbcore: registered new device driver usb

[ 76.685752] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller

[ 76.691820] xhci-hcd xhci-hcd.1.auto: new USB bus registered, assigned bus number 1

[ 76.700028] xhci-hcd xhci-hcd.1.auto: hcc params 0x0220f04c hci version 0x100 quirks 0x00210010

[ 76.708843] xhci-hcd xhci-hcd.1.auto: irq 438, io mem 0x48890000

[76.715539] hub 1-0:1.0: USB hub found

[ 76.719324] hub 1-0:1.0: 1 port detected

[ 76.724294] omap_hsmmc 480b4000.mmc: could not find pctldev for node /ocp/padconf@4844a000/mmc2_iodelay_ddr_3_3v_conf, deferring probe

[ 76.7