There is a well known device number contention bug
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=155895
that prevents serial ports on PowerMacs from functioning when 8250
support is built directly into the kernel.
While we wait [forever???] for LANANA to assign a set of device numbers
for pmac_zlog that do not conflict with those assigned to the 8250,
there is a simple workaround:
build 8250 support as a loadable module:
#
# Serial drivers
#
CONFIG_SERIAL_8250=m
CONFIG_SERIAL_8250_PCI=m
CONFIG_SERIAL_8250_PNP=m
I don't know of any platform that has both 8250 and pmac_zilog serial
ports so this should be a painless workaround.
-Joseph
--
jsacco [at] gnome [dot] org
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