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Commit 80b0e0ab authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Vinod Koul
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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: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 4501fe61

drivers/dma/omap-dma.c

+18 −0
Original line number Diff line number Diff line
@@ -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);