ls -l /sys/class/i2c-adapter/i2c-0/
-rw-r--r-- root     root         4096 2012-02-02 21:04 uevent
-r--r--r-- root     root         4096 2012-02-02 21:04 name
--w------- root     root         4096 2012-02-02 21:04 new_device
--w------- root     root         4096 2012-02-02 21:04 delete_device
lrwxrwxrwx root     root              2012-02-02 21:04 subsystem -> ../../../../bus/i2c
drwxr-xr-x root     root              2012-02-02 21:04 power
lrwxrwxrwx root     root              2012-02-02 21:04 device -> ../../rk29_i2c.0
drwxr-xr-x root     root              2012-02-02 21:04 0-001a
drwxr-xr-x root     root              2012-02-02 21:04 0-0051
drwxr-xr-x root     root              2012-02-02 21:04 0-001c