Hello, I wrote:

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  Also, what mmio-ide in the compat properly means in the context 
of ide_platform which is able to handle both port and memory mapped 
IDE.

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I/O-space is only valid in the context of PCI, ISA, or similar buses, 
and
the bus-specific reg format indicates whether it's mmio-space or
io-space.

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  You could save time on lecturing me (and use it to look on the 
driver ;-).

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Sorry, I misread the question as being a mismatch between the 
capabilities of the device binding and the driver, not about the 
specific compatible name.

    That too. :-)

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Something like "generic-ide" would probably be better.

    I strongly disagree with "generic" part. The generic IDE could only be 
said of 1:1 I/O mapped IDE ports, not about this fancy mapping.

    BTW, there's already something called drivers/ide/ide-generic.c... :-)

MBR, Sergei