[PATCH v2] dmaengine: xilinx_dma: Set dma_device directions

[Folker Schwesinger]

On Wed May 7, 2025 at 8:21 PM CEST, Thomas Gessler wrote:
> Coalesce the direction bits from the enabled TX and/or RX channels into
> the directions bit mask of dma_device. Without this mask set,
> dma_get_slave_caps() in the DMAEngine fails, which prevents the driver
> from being used with an IIO DMAEngine buffer.
>
> Signed-off-by: Thomas Gessler <thomas.gessler at brueckmann-gmbh.de>

Tested-by: Folker Schwesinger <dev at folker-schwesinger.de>

> ---
> Changes in v2:
>   - Change to Suraj's simpler version as per Radhey's request
>
>  drivers/dma/xilinx/xilinx_dma.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
> index 3ad44afd0e74..8f26b6eff3f3 100644
> --- a/drivers/dma/xilinx/xilinx_dma.c
> +++ b/drivers/dma/xilinx/xilinx_dma.c
> @@ -2909,6 +2909,8 @@ static int xilinx_dma_chan_probe(struct xilinx_dma_device *xdev,
>  		return -EINVAL;
>  	}
>  
> +	xdev->common.directions |= chan->direction;
> +
>  	/* Request the interrupt */
>  	chan->irq = of_irq_get(node, chan->tdest);
>  	if (chan->irq < 0)