# # USB Core configuration # config USB_DEBUG bool "USB verbose debug messages" depends on USB help Say Y here if you want the USB core & hub drivers to produce a bunch of debug messages to the system log. Select this if you are having a problem with USB support and want to see more of what is going on. comment "Miscellaneous USB options" depends on USB config USB_DEVICEFS bool "USB device filesystem" depends on USB ---help--- If you say Y here (and to "/proc file system support" in the "File systems" section, above), you will get a file /proc/bus/usb/devices which lists the devices currently connected to your USB bus or busses, and for every connected device a file named "/proc/bus/usb/xxx/yyy", where xxx is the bus number and yyy the device number; the latter files can be used by user space programs to talk directly to the device. These files are "virtual", meaning they are generated on the fly and not stored on the hard drive. You may need to mount the usbfs file system to see the files, use mount -t usbfs none /proc/bus/usb For the format of the various /proc/bus/usb/ files, please read . Please note that this code is completely unrelated to devfs, the "/dev file system support". Most users want to say Y here. config USB_BANDWIDTH bool "Enforce USB bandwidth allocation (EXPERIMENTAL)" depends on USB && EXPERIMENTAL help If you say Y here, the USB subsystem enforces USB bandwidth allocation and will prevent some device opens from succeeding if they would cause USB bandwidth usage to go above 90% of the bus bandwidth. If you say N here, these conditions will cause warning messages about USB bandwidth usage to be logged and some devices or drivers may not work correctly. config USB_DYNAMIC_MINORS bool "Dynamic USB minor allocation (EXPERIMENTAL)" depends on USB && EXPERIMENTAL help If you say Y here, the USB subsystem will use dynamic minor allocation for any device that uses the USB major number. This means that you can have more than 16 of a single type of device (like USB printers). If you are unsure about this, say N here.