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authorStephen Warren <swarren@wwwdotorg.org>2015-03-24 20:07:33 -0600
committerMarek Vasut <marex@denx.de>2015-04-14 05:47:59 +0200
commit927c1fa266ead17acb09e9397dbd33578f3ee267 (patch)
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Create API to map between CPU physical and bus addresses
On some SoCs, DMA-capable peripherals see a different address space to the CPU's physical address space. Create an API to allow platform-agnostic drivers to convert between the two address spaces when programming DMA operations. This API will exist on all platforms, but will have a dummy implementation when this feature is not required. Other platforms will enable CONFIG_PHYS_TO_BUS and provide the required implementation. Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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