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| author | Arnd Bergmann <arnd@arndb.de> | 2022-04-02 12:29:36 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2022-04-07 09:31:21 +0200 |
| commit | 91276c0fa4b405c90d7a7fafdca84ae18a516bbf (patch) | |
| tree | 6619dfb005de61a8b93569da2c52a353a59df9ac /arch/arm/Kconfig | |
| parent | 09f6b27d5ddd9ad0ec096d1b0f8decdacc70f0f8 (diff) | |
| download | linux-91276c0fa4b405c90d7a7fafdca84ae18a516bbf.tar.bz2 | |
ARM: s3c24xx: remove support for ISA drivers on BAST PC/104
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 there is a
recurring discussion about dropping s3c24xx altogether, 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.
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index faf696173af7..2242d2ae8854 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -444,7 +444,6 @@ config ARCH_S3C24XX select CLKSRC_SAMSUNG_PWM select GPIO_SAMSUNG select GPIOLIB - select NEED_MACH_IO_H select S3C2410_WATCHDOG select SAMSUNG_ATAGS select USE_OF |