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dmaengine: axi-dmac: wrap entire dt parse in a function 

All these attributes will be read from registers in newer core versions, so
just wrap the logic into a function.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20200825151950.57605-5-alexandru.ardelean@analog.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Alexandru Ardelean 2020-08-25 18:19:48 +03:00 committed by Vinod Koul
parent 08b36dba23
commit 06b6e88c7e
1 changed files with 24 additions and 16 deletions
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40
drivers/dma/dma-axi-dmac.c
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@ -774,6 +774,28 @@ static int axi_dmac_parse_chan_dt(struct device_node *of_chan,
return 0;
}
static int axi_dmac_parse_dt(struct device *dev, struct axi_dmac *dmac)
{
struct device_node *of_channels, *of_chan;
int ret;
of_channels = of_get_child_by_name(dev->of_node, "adi,channels");
if (of_channels == NULL)
return -ENODEV;
for_each_child_of_node(of_channels, of_chan) {
ret = axi_dmac_parse_chan_dt(of_chan, &dmac->chan);
if (ret) {
of_node_put(of_chan);
of_node_put(of_channels);
return -EINVAL;
}
}
of_node_put(of_channels);
return 0;
}
static int axi_dmac_detect_caps(struct axi_dmac *dmac, unsigned int version)
{
struct axi_dmac_chan *chan = &dmac->chan;
@ -823,7 +845,6 @@ static int axi_dmac_detect_caps(struct axi_dmac *dmac, unsigned int version)
static int axi_dmac_probe(struct platform_device *pdev)
{
struct device_node *of_channels, *of_chan;
struct dma_device *dma_dev;
struct axi_dmac *dmac;
struct resource *res;
@ -854,22 +875,9 @@ static int axi_dmac_probe(struct platform_device *pdev)
if (ret < 0)
return ret;
of_channels = of_get_child_by_name(pdev->dev.of_node, "adi,channels");
if (of_channels == NULL) {
ret = -ENODEV;
ret = axi_dmac_parse_dt(&pdev->dev, dmac);
if (ret < 0)
goto err_clk_disable;
}
for_each_child_of_node(of_channels, of_chan) {
ret = axi_dmac_parse_chan_dt(of_chan, &dmac->chan);
if (ret) {
of_node_put(of_chan);
of_node_put(of_channels);
ret = -EINVAL;
goto err_clk_disable;
}
}
of_node_put(of_channels);
INIT_LIST_HEAD(&dmac->chan.active_descs);