Which routine does make dev file of usb char device ?

["J.H.Kim" <frog1120@xxxxxxxxx>]

Hi, everyone

I'm looking for codes which makes 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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