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Subject[PATCH v2 4/6] dmaengine: axi-dmac: wrap entire dt parse in a function
Date
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>
---
drivers/dma/dma-axi-dmac.c | 40 +++++++++++++++++++++++---------------
1 file changed, 24 insertions(+), 16 deletions(-)

diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c
index f4b17b5e3914..1a1e227fa935 100644
--- a/drivers/dma/dma-axi-dmac.c
+++ b/drivers/dma/dma-axi-dmac.c
@@ -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);

--
2.17.1
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