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-rw-r--r--drivers/dma/fsldma.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 5dfedf326573..cbd5b9684521 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -406,6 +406,32 @@ static void fsl_dma_free_chan_resources(struct dma_chan *chan)
406 dma_pool_destroy(fsl_chan->desc_pool); 406 dma_pool_destroy(fsl_chan->desc_pool);
407} 407}
408 408
409static struct dma_async_tx_descriptor *
410fsl_dma_prep_interrupt(struct dma_chan *chan)
411{
412 struct fsl_dma_chan *fsl_chan;
413 struct fsl_desc_sw *new;
414
415 if (!chan)
416 return NULL;
417
418 fsl_chan = to_fsl_chan(chan);
419
420 new = fsl_dma_alloc_descriptor(fsl_chan);
421 if (!new) {
422 dev_err(fsl_chan->dev, "No free memory for link descriptor\n");
423 return NULL;
424 }
425
426 new->async_tx.cookie = -EBUSY;
427 new->async_tx.ack = 0;
428
429 /* Set End-of-link to the last link descriptor of new list*/
430 set_ld_eol(fsl_chan, new);
431
432 return &new->async_tx;
433}
434
409static struct dma_async_tx_descriptor *fsl_dma_prep_memcpy( 435static struct dma_async_tx_descriptor *fsl_dma_prep_memcpy(
410 struct dma_chan *chan, dma_addr_t dma_dest, dma_addr_t dma_src, 436 struct dma_chan *chan, dma_addr_t dma_dest, dma_addr_t dma_src,
411 size_t len, unsigned long flags) 437 size_t len, unsigned long flags)
@@ -1020,6 +1046,7 @@ static int __devinit of_fsl_dma_probe(struct of_device *dev,
1020 dma_cap_set(DMA_INTERRUPT, fdev->common.cap_mask); 1046 dma_cap_set(DMA_INTERRUPT, fdev->common.cap_mask);
1021 fdev->common.device_alloc_chan_resources = fsl_dma_alloc_chan_resources; 1047 fdev->common.device_alloc_chan_resources = fsl_dma_alloc_chan_resources;
1022 fdev->common.device_free_chan_resources = fsl_dma_free_chan_resources; 1048 fdev->common.device_free_chan_resources = fsl_dma_free_chan_resources;
1049 fdev->common.device_prep_dma_interrupt = fsl_dma_prep_interrupt;
1023 fdev->common.device_prep_dma_memcpy = fsl_dma_prep_memcpy; 1050 fdev->common.device_prep_dma_memcpy = fsl_dma_prep_memcpy;
1024 fdev->common.device_is_tx_complete = fsl_dma_is_complete; 1051 fdev->common.device_is_tx_complete = fsl_dma_is_complete;
1025 fdev->common.device_issue_pending = fsl_dma_memcpy_issue_pending; 1052 fdev->common.device_issue_pending = fsl_dma_memcpy_issue_pending;