diff options
| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2014-03-29 14:33:30 +0100 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2014-03-29 14:33:30 +0100 |
| commit | 80b0e0abfbcf9897ee263a79bc4cbdcfeca72431 (patch) | |
| tree | 98d9a33911b0ae054b52848da9c065cd08d16a52 /drivers/dma | |
| parent | dma: dw: Add suspend and resume handling for PCI mode DW_DMAC. (diff) | |
| download | linux-80b0e0abfbcf9897ee263a79bc4cbdcfeca72431.tar.xz linux-80b0e0abfbcf9897ee263a79bc4cbdcfeca72431.zip | |
dma: omap-dma: 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: Tony Lindgren <tony@atomide.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/omap-dma.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c index 362e7c49f2e1..928a0fa39f89 100644 --- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -597,6 +597,23 @@ static void omap_dma_free(struct omap_dmadev *od) kfree(od); } +#define OMAP_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)) + +static int omap_dma_device_slave_caps(struct dma_chan *dchan, + struct dma_slave_caps *caps) +{ + caps->src_addr_widths = OMAP_DMA_BUSWIDTHS; + caps->dstn_addr_widths = OMAP_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_BURST; + + return 0; +} + static int omap_dma_probe(struct platform_device *pdev) { struct omap_dmadev *od; @@ -615,6 +632,7 @@ static int omap_dma_probe(struct platform_device *pdev) od->ddev.device_prep_slave_sg = omap_dma_prep_slave_sg; od->ddev.device_prep_dma_cyclic = omap_dma_prep_dma_cyclic; od->ddev.device_control = omap_dma_control; + od->ddev.device_slave_caps = omap_dma_device_slave_caps; od->ddev.dev = &pdev->dev; INIT_LIST_HEAD(&od->ddev.channels); INIT_LIST_HEAD(&od->pending); |