I'm not very familiar with the kernel Kconfig/makefile layout, but it seems the mach-rdc321x stuff, namely gpio.c and platform.c in arch/x86/mach-rdc321x/ don't get compiled. I couldn't work out if there was some kernel option needed to enable them, but judging from the other x86 architectures I think the above patch is what's needed.
I'm baffled as to why this would be missing - it seems this is broken all the way from 2.6.27.5 -> 2.6.28.8. I guess nobody uses GPIO on RDC platforms?
rdc-gpio-working-2.6.27.5.patch
Description: Binary data
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