Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 2c88ee6b authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Vinod Koul
Browse files

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: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: default avatarJoel Fernandes <joelf@ti.com>
Reviewed-and-Tested-by: default avatarJoel Fernandes <joelf@ti.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 83bb3126

drivers/dma/edma.c

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