On Sat, Jan 26, 2013 at 12:32:16AM +0000, Alan Cox wrote: > > Or am I missing something big and major here? How have people been > > seeing and configuring their tty devices for the last 8+ years or so > > since the 2.6.0 kernel was released with uevent support for tty > > devices? > > Minor more than major. The newer ACPI tries to begin to describe what > is on the other end of serial busses being used for internal purposes. > > Now there are several good reasons we want to know what is on the end > of a port already that are not currently handled, and I have suggested > a port "type" attribute would be useful (eg unknown, modem, bluetooth, > ax25, dcc, etc) so the kernel can help user space enumerate in user > friendly fashion. That's fine, just add a single attribute to the existing tty class device, not a whole new class, which is what this code does. > Where it gets slightly more tricky is that we are beginning to see > systems where the firmware is describing > > serial port (and power management) > device behind port (and power management) > > so there is a power management hierarchy involved. Ick, that's going to get messy fast. There's no hope they would switch to a USB connection instead for these devices, could they? That would fix up most of these issues, and make the devices discoverable. thanks, greg k-h -- 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
