RK3568平台（USB篇）禁用USB端口

一.linux中怎样查看usb的端口号

在USB口插入U盘：

[  198.141319][  T106] usb 3-1.3: new SuperSpeed Gen 1 USB device number 5 using xhci-hcd
[  198.161695][  T106] usb 3-1.3: New USB device found, idVendor=0781, idProduct=5591, bcdDevice= 1.00
[  198.161721][  T106] usb 3-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  198.161732][  T106] usb 3-1.3: Product:  SanDisk 3.2Gen1
[  198.161740][  T106] usb 3-1.3: Manufacturer:  USB
[  198.161747][  T106] usb 3-1.3: SerialNumber: 00015405032923011514

这里可以知道插入的android的端口号为3-1.3。

插拔U盘/sys/bus/usb/devices下出现不同的端口号：

二.