Greg KH wrote: > This is why that class directory was created. In order that userspace > can find all of the i2c adapters. Okay, good explaination. Sorry to bother you with this question - I have a better understanding of what the /sys/bus directory is for. :) In fact, on further examination, i2c-adapter class devices are similar to scsi_host class devices. scsi_hosts don't appear on the scsi bus - only scsi_devices do. Thanks for your time, Matt.