The channel parameters (which are read from the device-tree) are adjusted
for the DMAEngine framework in the axi_dmac_parse_chan_dt() function, after
they are read from the device-tree.
When we want to read these from registers, we will need to use the same
logic, so this change splits the logic into a separate function.
Signed-off-by: Alexandru Ardelean <alexandru.ardel...@analog.com>
---
drivers/dma/dma-axi-dmac.c | 25 +++++++++++++++----------
1 file changed, 15 insertions(+), 10 deletions(-)
diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c
index 473c4a159c89..95aea2b423ac 100644
--- a/drivers/dma/dma-axi-dmac.c
+++ b/drivers/dma/dma-axi-dmac.c
@@ -717,6 +717,20 @@ static const struct regmap_config axi_dmac_regmap_config =
{
.writeable_reg = axi_dmac_regmap_rdwr,
};
+static void axi_dmac_adjust_chan_params(struct axi_dmac_chan *chan)
+{
+ chan->address_align_mask = max(chan->dest_width, chan->src_width) - 1;
+
+ if (axi_dmac_dest_is_mem(chan) && axi_dmac_src_is_mem(chan))
+ chan->direction = DMA_MEM_TO_MEM;
+ else if (!axi_dmac_dest_is_mem(chan) && axi_dmac_src_is_mem(chan))
+ chan->direction = DMA_MEM_TO_DEV;
+ else if (axi_dmac_dest_is_mem(chan) && !axi_dmac_src_is_mem(chan))
+ chan->direction = DMA_DEV_TO_MEM;
+ else
+ chan->direction = DMA_DEV_TO_DEV;
+}
+
/*
* The configuration stored in the devicetree matches the configuration
* parameters of the peripheral instance and allows the driver to know which
@@ -760,16 +774,7 @@ static int axi_dmac_parse_chan_dt(struct device_node
*of_chan,
return ret;
chan->dest_width = val / 8;
- chan->address_align_mask = max(chan->dest_width, chan->src_width) - 1;
-
- if (axi_dmac_dest_is_mem(chan) && axi_dmac_src_is_mem(chan))
- chan->direction = DMA_MEM_TO_MEM;
- else if (!axi_dmac_dest_is_mem(chan) && axi_dmac_src_is_mem(chan))
- chan->direction = DMA_MEM_TO_DEV;
- else if (axi_dmac_dest_is_mem(chan) && !axi_dmac_src_is_mem(chan))
- chan->direction = DMA_DEV_TO_MEM;
- else
- chan->direction = DMA_DEV_TO_DEV;
+ axi_dmac_adjust_chan_params(chan);
return 0;
}
--
2.17.1
