On 05/04/2022 11:17, Arnd Bergmann wrote: > From: Arnd Bergmann <arnd@xxxxxxxx> > > BAST is the one machine that theoretically supports unmodified ISA > drivers for hardware on its PC/104 connector, using a custom version of > the inb()/outb() and inw()/outw() macros. > > This is incompatible with the generic version used in asm/io.h, and > can't easily be used in a multiplatform kernel. > > Removing the special case for 16-bit I/O port access on BAST gets us > closer to multiplatform, at the expense of any PC/104 users with 16-bit > cards having to either use an older kernel or modify their ISA drivers > to manually ioremap() the area and use readw()/write() in place of > inw()/outw(). Either way is probably ok, given that all of s3c24xx is > already on the way out next year, and many traditional ISA drivers are > already gone. > > Machines other than BAST already have no support for ISA drivers, though a > couple of them do map one of the external chip-selects into the ISA port > range, using the same address for 8-bit and 16-bit I/O. It is unlikely > that anything actually uses this mapping, but it's also easy to keep > this working by mapping it to the normal platform-independent PCI I/O > base that is otherwise unused on s3c24xx. > > The mach/map-base.h file is no longer referenced in global headers and > can be moved into the platform directory. > > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> > --- Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> Best regards, Krzysztof
