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authorManuel Lauss <manuel.lauss@gmail.com>2014-02-20 14:59:23 +0100
committerRalf Baechle <ralf@linux-mips.org>2014-03-26 23:09:21 +0100
commit88e9a93c9d53ddcf633aa07f14245da7f30408c2 (patch)
tree743667e5317873f87f82a430c71de90cd106b34a /arch/mips/Kconfig
parentMIPS: Extend DMA_MAYBE_COHERENT logic to DMA_NONCOHERENT use (diff)
downloadlinux-88e9a93c9d53ddcf633aa07f14245da7f30408c2.tar.xz
linux-88e9a93c9d53ddcf633aa07f14245da7f30408c2.zip
MIPS: Alchemy: Determine cohereny at runtime based on cpu type
All Alchemy chips have coherent DMA, but for example the USB or AC97 peripherals on the Au1000/1500/1100 are not. This patch uses DMA_MAYBE_COHERENT on Alchemy and sets coherentio based on CPU type. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Cc: Linux-MIPS <linux-mips@linux-mips.org> Patchwork: https://patchwork.linux-mips.org/patch/6576/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/Kconfig')
-rw-r--r--arch/mips/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index daef6709db15..51f5a09f179d 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -63,6 +63,7 @@ config MIPS_ALCHEMY
select CEVT_R4K
select CSRC_R4K
select IRQ_CPU
+ select DMA_MAYBE_COHERENT # Au1000,1500,1100 aren't, rest is
select SYS_HAS_CPU_MIPS32_R1
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_APM_EMULATION