> > > > 1) cannot have two gadget peripheral controllers > > as modules in a given > > > > kernel > > > > > True. > > > > Is this behavior by design or accident? > Design. The USB specs only allow one upstream > port, meaning one USB peripheral controller in > any USB-certified device. > So why would we bother trying to support two, if > that's contrary to the standards we follow?? The USB spec allows one upstream facing port, but that does not necessarily mean one USB peripheral controller per device. There are many mobile devices on the marketing that have two physical controllers connected to the same upstream port through a USB switch. These devices are USB certified, so by definition of the certification this implementation is not contrary to the standards we follow. --------------------------------------------------------------- This message and any attachments may contain Cypress (or its subsidiaries) confidential information. If it has been received in error, please advise the sender and immediately delete this message. --------------------------------------------------------------- -- 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
