> Ok, so I think that is related to what I originally hit. > > I played around with removing the current-speed property on canyonlands today, > and noticed that I would get no console output at all unless I specified a > baudrate with console=ttyS0,115200. That was sort of contrary to what I found > with bamboo, so I diffed the configs to see why. Bamboo has udbg enabled and > hence has legacy_serial builtin, whereas canyonlands just has of_serial. > > So on boards where of_serial is the only serial driver, we need either an > accurate current-speed property, or a specific baudrate on the command line. > That makes a bit more tenuous to remove the properties entirely, because if > people disable udbg and are relying on that behavior they get no more console > output. Need to think on that a bit I guess. > > Alternatively, we could try patching of_serial.c to do the baudrate probe > as well.
Well, I've always wondered why we just don't put the probe in the 8250 driver... I proposed it on the list a while back and there was no serious objection, but then forgot about it :-) We should do it, and check if the result is sane (looks like a standard speed). If it is, we should then just used it. Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
