[PATCH v2] iio: adc: stm32: Simplify with dev_err_probe()
From: Krzysztof Kozlowski
Date: Wed Aug 26 2020 - 12:18:52 EST
Common pattern of handling deferred probe can be simplified with
dev_err_probe(). Less code and also it prints the error value.
Signed-off-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
---
Changes since v1:
1. Update also stm32-dfsdm-core and stm32-dac-core.
2. Wrap around 100 characters (accepted by checkpatch).
---
drivers/iio/adc/stm32-adc-core.c | 57 ++++++++++--------------------
drivers/iio/adc/stm32-adc.c | 9 ++---
drivers/iio/adc/stm32-dfsdm-adc.c | 9 ++---
drivers/iio/adc/stm32-dfsdm-core.c | 8 ++---
drivers/iio/dac/stm32-dac-core.c | 5 +--
5 files changed, 26 insertions(+), 62 deletions(-)
diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
index 0e2068ec068b..d7bd4e28966c 100644
--- a/drivers/iio/adc/stm32-adc-core.c
+++ b/drivers/iio/adc/stm32-adc-core.c
@@ -582,11 +582,9 @@ static int stm32_adc_core_switches_probe(struct device *dev,
priv->syscfg = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
if (IS_ERR(priv->syscfg)) {
ret = PTR_ERR(priv->syscfg);
- if (ret != -ENODEV) {
- if (ret != -EPROBE_DEFER)
- dev_err(dev, "Can't probe syscfg: %d\n", ret);
- return ret;
- }
+ if (ret != -ENODEV)
+ return dev_err_probe(dev, ret, "Can't probe syscfg\n");
+
priv->syscfg = NULL;
}
@@ -596,12 +594,9 @@ static int stm32_adc_core_switches_probe(struct device *dev,
priv->booster = devm_regulator_get_optional(dev, "booster");
if (IS_ERR(priv->booster)) {
ret = PTR_ERR(priv->booster);
- if (ret != -ENODEV) {
- if (ret != -EPROBE_DEFER)
- dev_err(dev, "can't get booster %d\n",
- ret);
- return ret;
- }
+ if (ret != -ENODEV)
+ dev_err_probe(dev, ret, "can't get booster\n");
+
priv->booster = NULL;
}
}
@@ -612,11 +607,9 @@ static int stm32_adc_core_switches_probe(struct device *dev,
priv->vdd = devm_regulator_get_optional(dev, "vdd");
if (IS_ERR(priv->vdd)) {
ret = PTR_ERR(priv->vdd);
- if (ret != -ENODEV) {
- if (ret != -EPROBE_DEFER)
- dev_err(dev, "can't get vdd %d\n", ret);
- return ret;
- }
+ if (ret != -ENODEV)
+ return dev_err_probe(dev, ret, "can't get vdd\n");
+
priv->vdd = NULL;
}
}
@@ -669,40 +662,28 @@ static int stm32_adc_probe(struct platform_device *pdev)
priv->common.phys_base = res->start;
priv->vdda = devm_regulator_get(&pdev->dev, "vdda");
- if (IS_ERR(priv->vdda)) {
- ret = PTR_ERR(priv->vdda);
- if (ret != -EPROBE_DEFER)
- dev_err(&pdev->dev, "vdda get failed, %d\n", ret);
- return ret;
- }
+ if (IS_ERR(priv->vdda))
+ return dev_err_probe(&pdev->dev, PTR_ERR(priv->vdda), "vdda get failed\n");
priv->vref = devm_regulator_get(&pdev->dev, "vref");
- if (IS_ERR(priv->vref)) {
- ret = PTR_ERR(priv->vref);
- if (ret != -EPROBE_DEFER)
- dev_err(&pdev->dev, "vref get failed, %d\n", ret);
- return ret;
- }
+ if (IS_ERR(priv->vref))
+ return dev_err_probe(&pdev->dev, PTR_ERR(priv->vref), "vref get failed\n");
priv->aclk = devm_clk_get(&pdev->dev, "adc");
if (IS_ERR(priv->aclk)) {
ret = PTR_ERR(priv->aclk);
- if (ret != -ENOENT) {
- if (ret != -EPROBE_DEFER)
- dev_err(&pdev->dev, "Can't get 'adc' clock\n");
- return ret;
- }
+ if (ret != -ENOENT)
+ return dev_err_probe(&pdev->dev, ret, "Can't get 'adc' clock\n");
+
priv->aclk = NULL;
}
priv->bclk = devm_clk_get(&pdev->dev, "bus");
if (IS_ERR(priv->bclk)) {
ret = PTR_ERR(priv->bclk);
- if (ret != -ENOENT) {
- if (ret != -EPROBE_DEFER)
- dev_err(&pdev->dev, "Can't get 'bus' clock\n");
- return ret;
- }
+ if (ret != -ENOENT)
+ return dev_err_probe(&pdev->dev, ret, "Can't get 'bus' clock\n");
+
priv->bclk = NULL;
}
diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
index 3eb9ebe8372f..b8e764ca54a6 100644
--- a/drivers/iio/adc/stm32-adc.c
+++ b/drivers/iio/adc/stm32-adc.c
@@ -1805,13 +1805,8 @@ static int stm32_adc_dma_request(struct device *dev, struct iio_dev *indio_dev)
adc->dma_chan = dma_request_chan(dev, "rx");
if (IS_ERR(adc->dma_chan)) {
ret = PTR_ERR(adc->dma_chan);
- if (ret != -ENODEV) {
- if (ret != -EPROBE_DEFER)
- dev_err(dev,
- "DMA channel request failed with %d\n",
- ret);
- return ret;
- }
+ if (ret != -ENODEV)
+ return dev_err_probe(dev, ret, "DMA channel request failed with\n");
/* DMA is optional: fall back to IRQ mode */
adc->dma_chan = NULL;
diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c
index 5e10fb4f3704..12c951078c1f 100644
--- a/drivers/iio/adc/stm32-dfsdm-adc.c
+++ b/drivers/iio/adc/stm32-dfsdm-adc.c
@@ -1473,13 +1473,8 @@ static int stm32_dfsdm_adc_init(struct device *dev, struct iio_dev *indio_dev)
/* Optionally request DMA */
ret = stm32_dfsdm_dma_request(dev, indio_dev);
if (ret) {
- if (ret != -ENODEV) {
- if (ret != -EPROBE_DEFER)
- dev_err(dev,
- "DMA channel request failed with %d\n",
- ret);
- return ret;
- }
+ if (ret != -ENODEV)
+ return dev_err_probe(dev, ret, "DMA channel request failed with\n");
dev_dbg(dev, "No DMA support\n");
return 0;
diff --git a/drivers/iio/adc/stm32-dfsdm-core.c b/drivers/iio/adc/stm32-dfsdm-core.c
index 26e2011c5868..34e4e6e59acf 100644
--- a/drivers/iio/adc/stm32-dfsdm-core.c
+++ b/drivers/iio/adc/stm32-dfsdm-core.c
@@ -243,12 +243,8 @@ static int stm32_dfsdm_parse_of(struct platform_device *pdev,
* on use case.
*/
priv->clk = devm_clk_get(&pdev->dev, "dfsdm");
- if (IS_ERR(priv->clk)) {
- ret = PTR_ERR(priv->clk);
- if (ret != -EPROBE_DEFER)
- dev_err(&pdev->dev, "Failed to get clock (%d)\n", ret);
- return ret;
- }
+ if (IS_ERR(priv->clk))
+ return dev_err_probe(&pdev->dev, PTR_ERR(priv->clk), "Failed to get clock\n");
priv->aclk = devm_clk_get(&pdev->dev, "audio");
if (IS_ERR(priv->aclk))
diff --git a/drivers/iio/dac/stm32-dac-core.c b/drivers/iio/dac/stm32-dac-core.c
index 7e5809ba0dee..906436780347 100644
--- a/drivers/iio/dac/stm32-dac-core.c
+++ b/drivers/iio/dac/stm32-dac-core.c
@@ -150,10 +150,7 @@ static int stm32_dac_probe(struct platform_device *pdev)
rst = devm_reset_control_get_optional_exclusive(dev, NULL);
if (rst) {
if (IS_ERR(rst)) {
- ret = PTR_ERR(rst);
- if (ret != -EPROBE_DEFER)
- dev_err(dev, "reset get failed, %d\n", ret);
-
+ ret = dev_err_probe(dev, PTR_ERR(rst), "reset get failed\n");
goto err_hw_stop;
}
--
2.17.1