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Documentation: dmaengine: clarify dma_slave_config expectations

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dma_slave_config is expected to be set for slave operations Only, not for
memcpy ones

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Vinod Koul 2014-12-07 23:18:01 +05:30
parent 6c04cd4f57
commit 6269591b98
1 changed files with 4 additions and 0 deletions
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4
Documentation/dmaengine/provider.txt
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@ -310,6 +310,10 @@ supported.
- Even though that structure contains a direction field, this
field is deprecated in favor of the direction argument given to
the prep_* functions
- This call is mandatory for slave operations only. This should NOT be
set or expected to be set for memcpy operations.
If a driver support both, it should use this call for slave
operations only and not for memcpy ones.
* device_pause
- Pauses a transfer on the channel