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SubjectRe: [RFC 01/32] Kconfig: introduce and depend on LEGACY_PCI
On Tue, Dec 28, 2021 at 11:58:55AM +0100, Niklas Schnelle wrote:
> We add both LEGACY_PCI and HAS_IOPORT to differentiate between two
> cases. HAS_IOPORT is for PC-style devices that are not on a PCI card
> while LEGACY_PCI is for PCI drivers that require port I/O. This
> includes pre-PCIe devices as well as PCIe devices which require
> features like I/O spaces. The "legacy" naming is comes from the PCIe
> spec which in section says "PCI Express supports I/O Space for
> compatibility with legacy devices which require their use. Future
> revisions of this specification may deprecate the use of I/O Space."

Ah, then mention the reason why this is called LEGACY_PCI is that it is
because that is what the PCI spec calls it. It was not obvious here at
all that this is where the name came from.


greg k-h

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