tree 122f3912ed717627b0e5bac8c72f42ef2eb0cb6e
parent c14330417ef2050f4bf38ac20e125785fea14351
author Ira Snyder <iws@ovro.caltech.edu> 1285847206 +0000
committer Dan Williams <dan.j.williams@intel.com> 1286487701 -0700

fsldma: improved DMA_SLAVE support

Now that the generic DMAEngine API has support for scatterlist to
scatterlist copying, the device_prep_slave_sg() portion of the
DMA_SLAVE API is no longer necessary and has been removed.

However, the device_control() portion of the DMA_SLAVE API is still
useful to control device specific parameters, such as externally
controlled DMA transfers and maximum burst length.

A special dma_ctrl_cmd has been added to enable externally controlled
DMA transfers. This is currently specific to the Freescale DMA
controller, but can easily be made generic when another user is found.

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>