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| author | Alexandru Ardelean <alexandru.ardelean@analog.com> | 2020-08-25 18:19:49 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-08-25 18:37:11 +0300 |
| commit | 3061a65c1b3dbcad0d6c03e4edc606698cfa05d2 (patch) | |
| tree | 38423bc1b13782dcc31c38466722c2c35049a9cd /drivers/dma | |
| parent | 06b6e88c7ecf48e666bdd88615fa46155c8cb8f1 (diff) | |
| download | linux-3061a65c1b3dbcad0d6c03e4edc606698cfa05d2.tar.xz | |
dmaengine: axi-dmac: wrap channel parameter adjust into function
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.ardelean@analog.com>
Link: https://lore.kernel.org/r/20200825151950.57605-6-alexandru.ardelean@analog.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/dma-axi-dmac.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c index 1a1e227fa935..7ee56ae60093 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; } |