dmaengine: sirf: Add device_slave_caps interface

this patch adds device_slave_caps() callback as SiRF SoC sound drivers
depend on it.

Signed-off-by: Rongjun Ying <rongjun.ying@csr.com>
Signed-off-by: Barry Song <Barry.Song@csr.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/dma/sirf-dma.c b/drivers/dma/sirf-dma.c
index 6aec3ad814d3..d4d3a3109b16 100644
--- a/drivers/dma/sirf-dma.c
+++ b/drivers/dma/sirf-dma.c
@@ -640,6 +640,25 @@ bool sirfsoc_dma_filter_id(struct dma_chan *chan, void *chan_id)
 }
 EXPORT_SYMBOL(sirfsoc_dma_filter_id);
 
+#define SIRFSOC_DMA_BUSWIDTHS \
+        (BIT(DMA_SLAVE_BUSWIDTH_UNDEFINED) | \
+        BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
+        BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
+        BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \
+        BIT(DMA_SLAVE_BUSWIDTH_8_BYTES))
+
+static int sirfsoc_dma_device_slave_caps(struct dma_chan *dchan,
+        struct dma_slave_caps *caps)
+{
+        caps->src_addr_widths = SIRFSOC_DMA_BUSWIDTHS;
+        caps->dstn_addr_widths = SIRFSOC_DMA_BUSWIDTHS;
+        caps->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+        caps->cmd_pause = true;
+        caps->cmd_terminate = true;
+
+        return 0;
+}
+
 static int sirfsoc_dma_probe(struct platform_device *op)
 {
         struct device_node *dn = op->dev.of_node;
@@ -712,6 +731,7 @@ static int sirfsoc_dma_probe(struct platform_device *op)
         dma->device_tx_status = sirfsoc_dma_tx_status;
         dma->device_prep_interleaved_dma = sirfsoc_dma_prep_interleaved;
         dma->device_prep_dma_cyclic = sirfsoc_dma_prep_cyclic;
+        dma->device_slave_caps = sirfsoc_dma_device_slave_caps;
 
         INIT_LIST_HEAD(&dma->channels);
         dma_cap_set(DMA_SLAVE, dma->cap_mask);