/proc/bus/input/devices 구조

• I => @id: id of the device (struct input_id)
  • Bus     => id.bustype
  • Vendor  => id.vendor
  • Product => id.product
  • Version => id.version
• N => name of the device.
• P => physical path to the device in the system hierarchy.
• S => sysfs path.
• U => unique identification code for the device (if device has it).
• H => list of input handles associated with the device.
• B => bitmaps
• PROP => device properties and quirks.
• EV   => types of events supported by the device.
• KEY  => keys/buttons this device has.
• MSC  => miscellaneous events supported by the device.
• LED  => leds present on the device.

(출처)http://unix.stackexchange.com/questions/74903/explain-ev-in-proc-bus-input-devices-data