July 1, 2014

Linux USB sysfs device naming scheme

In Linux dmesg, you may see something like this:

usb 1-1.1: new high speed USB device using musb-hdrc and address 8
usb 1-1.1: New USB device found, idVendor=05e3, idProduct=0608
usb 1-1.1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
usb 1-1.1: Product: USB2.0 Hub
hub 1-1.1:1.0: USB hub found

The naming scheme is like this:


So 1-1.1:1.0 means:

Device connected to Root Hub 1, Port 1 which has another hub connected to it, Port1. Then Config 1, and interface 0.

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