On Tue, Mar 14, 2017 at 05:14:12PM -0400, valdis.kletnieks@xxxxxx wrote: > On Tue, 14 Mar 2017 21:59:20 +0100, Bjørn Mork said: > > > And another one: > > > > 5.) vendor independent class drivers > > > > > > IMHO perfect for the independent developer since there will be > > documentation available. The USB class specs are freely available for > > example. > > Hmm... /sys/class has a bunch of stuff already. /sys/class has nothing to do with a USB class specification :) > How many class drivers > are missing from there? And more importantly, class drivers for a hardware > class that's actually available (i.e. neither extinct or not shipping yet)? A USB "class" is a set of devices that follow a published specification. Like a USB HID device (keyboard/mouse/etc.) These are all published on the usb.org website. I think there still are a few class specs that are not yet implemented on Linux, usually because no one actually made any devices for them, or not enough that anyone really cares. A /sys/class/ entry is a kernel subsystem that describes a set of devices that interact with userspace in a defined way. Like an "input" class. That is how userspace interacts with _all_ keyboards, be they USB or PS/2 or i2c or whatever. Hope this helps, greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
