Messages in this thread | | | Date | Wed, 24 Sep 2008 13:59:16 +0200 | From | Nicolas Ferre <> | Subject | dmaengine: DMA_CTRL_ACK flag signification |
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Hi all,
I am in the process of writing a driver for an on-chip Atmel DMA engine.
I am a little confused about the use of the flag DMA_CTRL_ACK : It seems that it is set in most of the descriptors in use except the first or last of a descriptor chain. So, I cannot find where this flag is cleared. In short, I do not see what it is used for : how must I take it into account in my driver (in device_prep_dma_memcpy() for instance) ?
Can you enlighten me ?
Regards, -- Nicolas Ferre
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