* Peter Ujfalusi <peter.ujfalusi@xxxxxx> [140307 05:39]:
> With the callback implemented omap-dma can provide information to client
> drivers regarding to supported address widths, directions, residue
> granularity, etc.
This may need some testing against linux next with Russell's
omap-dma.c clean-up series merged there. Peter, care to check
if this patch is still valid against linux next?
Regards,
Tony
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
> ---
> drivers/dma/omap-dma.c | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c
> index 64ceca2920b8..b19f04f4390b 100644
> --- a/drivers/dma/omap-dma.c
> +++ b/drivers/dma/omap-dma.c
> @@ -1088,6 +1088,23 @@ static void omap_dma_free(struct omap_dmadev *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;
> @@ -1118,6 +1135,7 @@ 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);
> --
> 1.9.0
>
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