Setup the capabilities of the device/driver, so that users of the DMAengine API
can query them.
Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
---
drivers/dma/dma-jz4740.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/dma/dma-jz4740.c b/drivers/dma/dma-jz4740.c
index 7497578..7638b24 100644
--- a/drivers/dma/dma-jz4740.c
+++ b/drivers/dma/dma-jz4740.c
@@ -502,6 +502,9 @@ static void jz4740_dma_desc_free(struct virt_dma_desc *vdesc)
kfree(container_of(vdesc, struct jz4740_dma_desc, vdesc));
}
+#define JZ4740_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | BIT(DMA_SLAVE_BUSWIDTH_4_BYTES))
+
static int jz4740_dma_probe(struct platform_device *pdev)
{
struct jz4740_dmaengine_chan *chan;
@@ -538,6 +541,10 @@ static int jz4740_dma_probe(struct platform_device *pdev)
dd->device_prep_dma_cyclic = jz4740_dma_prep_dma_cyclic;
dd->device_config = jz4740_dma_slave_config;
dd->device_terminate_all = jz4740_dma_terminate_all;
+ dd->src_addr_widths = JZ4740_DMA_BUSWIDTHS;
+ dd->dst_addr_widths = JZ4740_DMA_BUSWIDTHS;
+ dd->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+ dd->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
dd->dev = &pdev->dev;
INIT_LIST_HEAD(&dd->channels);
--
1.7.10.4
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