summaryrefslogtreecommitdiff
path: root/arch/arm/include
diff options
context:
space:
mode:
authorRob Herring <rob.herring@calxeda.com>2012-08-21 12:20:17 +0200
committerMarek Szyprowski <m.szyprowski@samsung.com>2012-10-02 08:58:06 +0200
commitdd37e9405a8e85be49a60b2530efeb5f06bcb753 (patch)
tree0480f0c6ed0941eeeba4f94190814e8c710504b6 /arch/arm/include
parenta0d271cbfed1dd50278c6b06bead3d00ba0a88f9 (diff)
ARM: add coherent dma ops
arch_is_coherent is problematic as it is a global symbol. This doesn't work for multi-platform kernels or platforms which can support per device coherent DMA. This adds arm_coherent_dma_ops to be used for devices which connected coherently (i.e. to the ACP port on Cortex-A9 or A15). The arm_dma_ops are modified at boot when arch_is_coherent is true. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Diffstat (limited to 'arch/arm/include')
-rw-r--r--arch/arm/include/asm/dma-mapping.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 5c44dcb0987b..23004847bb05 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -13,6 +13,7 @@
#define DMA_ERROR_CODE (~0)
extern struct dma_map_ops arm_dma_ops;
+extern struct dma_map_ops arm_coherent_dma_ops;
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
{