[PATCH v2] dma: edma: Add support for Cyclic DMA

[Vinod Koul]

On Thu, Oct 31, 2013 at 04:31:23PM -0500, Joel Fernandes wrote:
> Using the PaRAM configuration function that we split for reuse by the
> different DMA types, we implement Cyclic DMA support.
> For the cyclic case, we pass different configuration parameters to this
> function, and handle all the Cyclic-specific functionality separately.
> 
> Callbacks to the DMA users are handled using vchan_cyclic_callback in
> the virt-dma layer. Linking is handled the same way as the slave SG case
> except for the last slot where we link it back to the first one in a
> cyclic fashion.
> 
> For continuity, we check for cases where no.of periods is great than the
> MAX number of slots the driver can allocate for a particular descriptor
> and error out on such cases.
Applied, thanks

~Vinod