• Paul Mundt's avatar
    sh: support for platforms without PIO. · 86e4dd5a
    Paul Mundt authored
    This extends some of the existing special casing for HAS_IOPORT
    platforms and gets it to the point where platforms can begin to
    conditionally select it.
    
    The major changes here are that the PIO routines themselves go away
    completely, including all of the machvec port mapping wrappers. With this
    in place it's possible for any non-machvec abusing platform to disable
    PIO completely. At present this is left as an opt-in until the abusers
    are the odd ones out instead of the majority.
    Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
    86e4dd5a
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