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dmaengine: axi-dmac: move version read in probe

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The 'version' of the IP core will be needed to adapt the driver to a new
feature (i.e. reading some DMA parameters from registers).
To do that, the version will be checked, so this is being moved out of the
axi_dmac_detect_caps() function.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20200825151950.57605-2-alexandru.ardelean@analog.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Alexandru Ardelean 2020-08-25 18:19:45 +03:00 committed by Vinod Koul
parent 112ec61b21
commit b377e670ba
1 changed files with 5 additions and 5 deletions
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10
drivers/dma/dma-axi-dmac.c
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@ -774,12 +774,9 @@ static int axi_dmac_parse_chan_dt(struct device_node *of_chan,
return 0;
}
static int axi_dmac_detect_caps(struct axi_dmac *dmac)
static int axi_dmac_detect_caps(struct axi_dmac *dmac, unsigned int version)
{
struct axi_dmac_chan *chan = &dmac->chan;
unsigned int version;
version = axi_dmac_read(dmac, ADI_AXI_REG_VERSION);
axi_dmac_write(dmac, AXI_DMAC_REG_FLAGS, AXI_DMAC_FLAG_CYCLIC);
if (axi_dmac_read(dmac, AXI_DMAC_REG_FLAGS) == AXI_DMAC_FLAG_CYCLIC)
@ -831,6 +828,7 @@ static int axi_dmac_probe(struct platform_device *pdev)
struct axi_dmac *dmac;
struct resource *res;
struct regmap *regmap;
unsigned int version;
int ret;
dmac = devm_kzalloc(&pdev->dev, sizeof(*dmac), GFP_KERNEL);
@ -898,7 +896,9 @@ static int axi_dmac_probe(struct platform_device *pdev)
if (ret < 0)
return ret;
ret = axi_dmac_detect_caps(dmac);
version = axi_dmac_read(dmac, ADI_AXI_REG_VERSION);
ret = axi_dmac_detect_caps(dmac, version);
if (ret)
goto err_clk_disable;