> wrote: > > in which oldest kernel could i plug composite > > gadget and use it.. I don't recall any particular changes were needed to make composite devices work from the host side in any 2.4+ kernel. Minor bugfixes at some points, maybe (!), at most. So your best course of action doesn't involve having someone else (!!) search for changes added in some dot-release ... but testing to see if the composite device of interest works on a given "old" kernel. I have a composite HID+AUDIO (speaker) device that I don't recall ever not working. The main technical issue is whether the right driver binds to each interface, and that binding model hasn't changed much since Linux-USB became usable. Even re-implementing using the driver model didn't change semantics. (Depending on the device, there may be userspace concerns, like being able to bind a HID interface to the right speakers. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
