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authorNiklas Schnelle <schnelle@linux.ibm.com>2023-03-23 19:33:52 +0300
committerArnd Bergmann <arnd@arndb.de>2023-04-05 23:15:19 +0300
commitfcbfe8121a45152a3cfbe1c28c96a3b611b7347d (patch)
tree3f1e4c0bd1979e56e9438396bea7686466c59dfe /drivers/bus
parentfe15c26ee26efa11741a7b632e9f23b01aca4cc6 (diff)
downloadlinux-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/Kconfig2
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