On 2013/3/29 2:44, Alan Stern wrote:
On Thu, 28 Mar 2013, Greg KH wrote:
ls /sys/bus/usb/devices
1-0:1.0 2-0:1.0 port1-1 port1-1.3 port2-1.2 port2-2 port4-3
1-1 2-1 port1-1.1 port1-1.4 port2-1.3 port3-1 port4-4
1-1.1 2-1:1.0 port1-1.2 port1-1.5 port2-1.4 port3-2 usb1
1-1:1.0 3-0:1.0 port1-1.2.1 port1-1.6 port2-1.5 port3-3 usb2
1-1.1:1.0 3-1 port1-1.2.2 port1-2 port2-1.6 port3-4 usb3
1-1.2 3-1:1.0 port1-1.2.3 port2-1 port2-1.7 port4-1 usb4
1-1.2:1.0 4-0:1.0 port1-1.2.4 port2-1.1 port2-1.8 port4-2
What does it look like if you reverse the naming scheme (hub dev name +
"port")? Doesn't that show the devices in a bit more logical way?
Hi Greg:
Do you mean e.g "port1.2-1", originally it's "port2-1.1".
2-1 is hub dev name?
No, I mean "2-1.port1" as these are the ports on the device, the device
prefix should go first, right?
If right, how about root hub port and it should be port2.usb1?
"usb1.port2"
Is this a good idea? There are userspace programs that look through
the list of files in /sys/bus/usb/devices, and they probably expect
filenames beginning with a number or with 'usb' to be USB devices and
After updating
ls /sys/bus/usb/devices
1-0:1.0 1-1.1:1.0 1-1.4 1-1.port3 2-1:1.0 2-1.6 2-1.port2
2-1.port6 usb1.port1 usb2.port1 usb3.port1 usb4 usb4.port4
1-1 1-1.1:1.1 1-1.4:1.0 1-1.port4 2-1.5 2-1.6:1.0 2-1.port3
3-0:1.0 usb1.port2 usb2.port2 usb3.port2 usb4.port1
1-1.1 1-1.2 1-1.port1 2-0:1.0 2-1.5:1.0 2-1.6:1.1 2-1.port4
4-0:1.0 usb1.port3 usb2.port3 usb3.port3 usb4.port2
1-1:1.0 1-1.2:1.0 1-1.port2 2-1 2-1.5:1.1 2-1.port1 2-1.port5 usb1
usb2 usb3 usb3.port4 usb4.port3
interfaces.
Alan Stern
--
Best Regards
Tianyu Lan
linux kernel enabling team
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