On 31 May 2013 02:01, Tony Lindgren [off-list ref] wrote:

* Linus Walleij [off-list ref] [130530 13:27]:

quoted

On Thu, May 30, 2013 at 10:18 PM, Tony Lindgren [off-list ref] wrote:

quoted

TUSB would work with dmaengine, but AFAIK we're still missing the
dmaengine configuration options to support increasing device end
FIFO address.

Can you elaborate on this? What is the usecase here?

There are many devices where the device FIFO is memory mapped to the
GPMC bus on omaps, like TUSB, OneNAND, smc911x etc. I believe the
only reason why these have not been converted to the dmaengine is
the fact that dmaengine cannot configure the DMA hardware to do
autoincrement and loop over the device FIFO.

Doesn't device_prep_interleaved_dma() help?

-jassi