大家好，我是做硬件的，最近一个项目上带OTG功能的USB调试不出来。奇怪的是USB口什么外设也没接，内核却说有检测到设备，枚举不上。打印信息如下：
usb 1-1: device descriptor read/64, error -71
usb 1-1: device descriptor read/64, error -71
usb 1-1: new full speed USB device using fsl-ehci and address 3
usb 1-1: device descriptor read/64, error -71
usb 1-1: device descriptor read/64, error -71
usb 1-1: new full speed USB device using fsl-ehci and address 4
usb 1-1: device not accepting address 4, error -71
usb 1-1: new full speed USB device using fsl-ehci and address 5
usb 1-1: device not accepting address 5, error -71
hub 1-0:1.0: unable to enumerate USB device on port 1
USB出来就4根线，已经被我拆光光了，还是如此，请各位帮忙分析下，可能的原因，感激不尽。
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