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dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclic

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Add context parameter to device_prep_slave_sg() and device_prep_dma_cyclic()
interfaces to allow passing client/target specific information associated
with the data transfer.
Modify all affected DMA engine drivers.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
This commit is contained in:
Alexandre Bounine
2012-03-08 15:35:13 -05:00
committed by Vinod Koul
parent 16052827d9
commit 185ecb5f4f
19 changed files with 49 additions and 30 deletions
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drivers/dma/pch_dma.c
+2 -1
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@@ -587,7 +587,8 @@ static void pd_issue_pending(struct dma_chan *chan)
static struct dma_async_tx_descriptor *pd_prep_slave_sg(struct dma_chan *chan,
struct scatterlist *sgl, unsigned int sg_len,
enum dma_transfer_direction direction, unsigned long flags)
enum dma_transfer_direction direction, unsigned long flags,
void *context)
{
struct pch_dma_chan *pd_chan = to_pd_chan(chan);
struct pch_dma_slave *pd_slave = chan->private;