On Sat, Jan 10, 2004 at 01:29:48AM +0100, David Zeuthen wrote: > On Sat, 2004-01-10 at 01:17, Greg KH wrote: > > But i2c adapters _are not_ on the i2c bus. They are the "bridge device" > > between say the PCI bus and the i2c bus. They are really just a PCI > > device, and so that's where they are in the tree. > > > > Ok, so they are exactly like PCI devices of class 12, subclass 3 (USB > serial controller) as seen in this screenshot > > http://freedesktop.org/~david/hal-pci-usb.png > > right? (except of course they bridge PCI with i2c instead of USB) Exactly. But for USB, we have an extra device, the USB root hub (usbX in sysfs). Hope this helps, greg k-h
