diff options
| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2014-04-14 14:42:01 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2014-04-22 21:35:54 +0530 |
| commit | 2c88ee6b6b9a715f2caba87b7c993ca485f68c0d (patch) | |
| tree | 5d70829e8112342e85ea0fded29d7f98c0df0311 /drivers/dma/edma.c | |
| parent | 83bb3126cc63620fe23c2a0539800ab7f8cf7ba4 (diff) | |
| download | blackbird-op-linux-2c88ee6b6b9a715f2caba87b7c993ca485f68c0d.tar.gz blackbird-op-linux-2c88ee6b6b9a715f2caba87b7c993ca485f68c0d.zip | |
dmaengine: edma: Implement device_slave_caps callback
With the callback implemented omap-dma can provide information to client
drivers regarding to supported address widths, directions, residue
granularity, etc.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Joel Fernandes <joelf@ti.com>
Reviewed-and-Tested-by: Joel Fernandes <joelf@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/edma.c')
| -rw-r--r-- | drivers/dma/edma.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index 5c24b6024278..ce230f8f6d98 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -853,6 +853,23 @@ static void __init edma_chan_init(struct edma_cc *ecc, } } +#define EDMA_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)) + +static int edma_dma_device_slave_caps(struct dma_chan *dchan, + struct dma_slave_caps *caps) +{ + caps->src_addr_widths = EDMA_DMA_BUSWIDTHS; + caps->dstn_addr_widths = EDMA_DMA_BUSWIDTHS; + caps->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); + caps->cmd_pause = true; + caps->cmd_terminate = true; + caps->residue_granularity = DMA_RESIDUE_GRANULARITY_DESCRIPTOR; + + return 0; +} + static void edma_dma_init(struct edma_cc *ecc, struct dma_device *dma, struct device *dev) { @@ -863,6 +880,7 @@ static void edma_dma_init(struct edma_cc *ecc, struct dma_device *dma, dma->device_issue_pending = edma_issue_pending; dma->device_tx_status = edma_tx_status; dma->device_control = edma_control; + dma->device_slave_caps = edma_dma_device_slave_caps; dma->dev = dev; INIT_LIST_HEAD(&dma->channels); |
