Some architectures are either exclusively cache-coherent or not, but some others can have only some devices that snoop the bus, while the rest doesn't. Provide a new CONFIG_OF_DMA_COHERENCY symbol for selection on such platforms.
Signed-off-by: Ahmad Fatoum <[email protected]> --- drivers/dma/Kconfig | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index 46b9b90d8231..d96fcd0f845a 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -7,4 +7,14 @@ config MXS_APBH_DMA select STMP_DEVICE help Experimental! + +config OF_DMA_COHERENCY + bool "Respect device tree DMA coherency settings" if COMPILE_TEST + depends on HAS_DMA + help + For most platforms supported, either all DMA is coherent or it isn't. + Platforms that have DMA masters of mixed coherency or that differ + from the architecture default will select this option to parse + DMA coherency out of the DT. + endmenu -- 2.30.2
