On Tue, Dec 04, 2012 at 07:50:30PM +0000, Alan Cox wrote: > > And if we have enumerated the UART controller from ACPI (it is > > probably attached to the platform bus) we can find the tty device it > > exports like: > > The property should not be in any ACPI specific form or space - just > attach it directly to the tty from ACPI, DT, driver internal knowledge, > PCI id, whatever The only property that comes into mind is _HID/_CID (referring to the ACPI ID) that can be used by userspace to find out type of the device behind the UART port. I don't know what name would be generic enough for the property, though. There are other resources as well in addition to the UartSerialBus(). For example we might have two GPIO lines connected to the bluetooth chip and these are represented as GpioIo ACPI resources. Since the bluetooth is mostly handled by the N_HCI line discipline, should the GPIO handling be done there as well? It can distinguish between DT and ACPI enumerated devices by comparing dev->of_node and ACPI_HANDLE(dev) so it can get the resources from both DT and ACPI but I'm not sure if it really belongs there. Or should this be in a separate driver? -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
