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The Linux kernel configuration item CONFIG_RAPIDIO_DMA_ENGINE
:
( CONFIG_RAPIDIO ) && ( CONFIG_DMADEVICES )
Say Y here if you want to use DMA Engine frameork for RapidIO data transfers to/from target RIO devices. RapidIO uses NREAD and NWRITE (NWRITE_R, SWRITE) requests to transfer data between local memory and memory on remote target device. You need a DMA controller capable to perform data transfers to/from RapidIO.
If you are unsure about this, say Y here.
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