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| author | Niklas Schnelle <schnelle@linux.ibm.com> | 2023-03-23 19:33:52 +0300 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2023-04-05 23:15:19 +0300 |
| commit | fcbfe8121a45152a3cfbe1c28c96a3b611b7347d (patch) | |
| tree | 3f1e4c0bd1979e56e9438396bea7686466c59dfe /drivers/bus | |
| parent | fe15c26ee26efa11741a7b632e9f23b01aca4cc6 (diff) | |
| download | linux-fcbfe8121a45152a3cfbe1c28c96a3b611b7347d.tar.xz | |
Kconfig: introduce HAS_IOPORT option and select it as necessary
We introduce a new HAS_IOPORT Kconfig option to indicate support for I/O
Port access. In a future patch HAS_IOPORT=n will disable compilation of
the I/O accessor functions inb()/outb() and friends on architectures
which can not meaningfully support legacy I/O spaces such as s390.
The following architectures do not select HAS_IOPORT:
* ARC
* C-SKY
* Hexagon
* Nios II
* OpenRISC
* s390
* User-Mode Linux
* Xtensa
All other architectures select HAS_IOPORT at least conditionally.
The "depends on" relations on HAS_IOPORT in drivers as well as ifdefs
for HAS_IOPORT specific sections will be added in subsequent patches on
a per subsystem basis.
Co-developed-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@kernel.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net> # for ARCH=um
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig index 7bfe998f3514..fcfa280df98a 100644 --- a/drivers/bus/Kconfig +++ b/drivers/bus/Kconfig @@ -81,7 +81,7 @@ config MOXTET config HISILICON_LPC bool "Support for ISA I/O space on HiSilicon Hip06/7" depends on (ARM64 && ARCH_HISI) || (COMPILE_TEST && !ALPHA && !HEXAGON && !PARISC) - depends on HAS_IOMEM + depends on HAS_IOPORT select INDIRECT_PIO if ARM64 help Driver to enable I/O access to devices attached to the Low Pin |