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dma: omap-dma: Implement device_slave_caps callback

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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>
This commit is contained in:
Peter Ujfalusi 2014-03-29 19:03:30 +05:30 committed by Vinod Koul
parent 4501fe61b2
commit 80b0e0abfb
1 changed files with 18 additions and 0 deletions
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18
drivers/dma/omap-dma.c
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@ -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);