On Mon, Feb 09, 2004 at 06:39:20PM -0800, Jon Smirl wrote: > Thanks for the explanation, PCI, I2C, SCSI and USB all make sense now. I hadn't > realized that USB hubs were also USB devices. This is all new so some things > aren't obvious to me. > > So looking at it from a symmetry point of view then shouldn't all entries in > /sys/bus have a parallel entry in /sys/class like 'bus'_host? That might be a good idea, for 2.7 > I have these buses: > i2c i2c-adapter > ide > ieee1394 > pci pci_bus > platform > scsi scsi_host > usb usb_host > > What do you think about moving the 'host' class directories out of /class and > into the bus directory? For example move /sys/class/usb_host to > /sys/bus/usb/host, /sys/class/i2c_adapter to /sys/bus/i2c/adapter (or host). That would take some driver core changes to do this. Also 2.7 work. > Moving the 'host' items out of /sys/class will make /sys/class have more of a > direct correspondence with /udev. But there's no reason it has to have a directo correspondence with what udev sees. udev is smart enough to only care about the devices that have a "dev" file. And none of the above do, for now. But some types of host controllers might in the future, who knows :) thanks, greg k-h
