Who does makes USB dev files ?

[J.H.Kim]

Hi, everyone

I'm looking for routines which make dev files (for example, /dev/usb/lp0 
for usb printer) of USB character devices.

Is it udev or kernel driver module?

If it is udev, how does it determine the major and minor number of the 
device?

The uevent message from kernel for usb printer seems not to include the 
information on the major and minor numbers.
Captured uevent message for usb printer was like this :
    ACTION=add
    DEVPATH=/devices/pci0000:00/0000:00:1d.3/usb4/4-2/4-2:1.0
    SUBSYSTEM=usb
    DEVTYPE=usb_interface
    DRIVER=usblp
    PHYSDEVBUS=usb
    PHYSDEVDRIVER=usblp
    DEVICE=/proc/bus/usb/004/002
    PRODUCT=3f0/8604/100
    TYPE=0/0/0
    INTERFACE=7/1/2
    MODALIAS=usb:v03F0p8604d0100dc00dsc00dp00ic07isc01ip02
    SEQNUM=940

Please let me know which routines makes dev files for usb character devices.

Thanks in advance.


Regards,
J.H.Kim


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