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New API for mixed accesses
A new API allows to write drivers that can work on either devices accessed over PIO or MMIO. A few drivers use it, but there doesn't seem to be a consensus in the kernel community around it.
- For PIO: ioport_map() and ioport_unmap(). They don't really map, but they return a special cookie.
- For MMIO: ioremap() and iounmap(). As usual.
Access, works both on addresses returned by ioport_map() and ioremap()
- ioread[8/16/32]() and iowrite[8/16/32] for single access
- ioread_rep[8/16/32]() and iowrite_rep[8/16/32]() for repeated accesses