On 03/26/2015 12:50 PM, Vinod Koul wrote:

On Wed, Mar 11, 2015 at 03:23:24PM +0200, Peter Ujfalusi wrote:

quoted

DMA routers are transparent devices used to mux DMA requests from
peripherals to DMA controllers. They are used when the SoC integrates more
devices with DMA requests then their controller can handle.
DRA7x is one example of such SoC, where the sDMA can hanlde 128 DMA request
lines, but in SoC level it has 205 DMA requests.

The of_dma_router will be registered as of_dma_controller with special
xlate function and additional parameters and the code will translate and
requests a DMA channel from the real DMA controller.
This way the router can be transparent for the system while remaining generic
enough to be used in different environments.

Looks fine, was expecting a Documentation updates as well, but that can come
as follow up patch too

I have added the DT binding document since this series adds support for
routers for platforms booting with DT:

Documentation/devicetree/bindings/dma/dma.txt | 28 ++++++++

-- 
P?ter