diff mbox series

[v2,08/18] iio: adc: stm32: Simplify with dev_err_probe()

Message ID 20200827192642.1725-8-krzk@kernel.org (mailing list archive)
State New, archived
Headers show
Series [v2,01/18] iio: accel: bma180: Simplify with dev_err_probe() | expand

Commit Message

Krzysztof Kozlowski Aug. 27, 2020, 7:26 p.m. UTC
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@kernel.org>

---

Changes since v1:
1. Convert to devm_clk_get_optional
2. Update also stm32-dfsdm-core and stm32-dac-core.
3. Wrap around 100 characters (accepted by checkpatch).
---
 drivers/iio/adc/stm32-adc-core.c   | 67 +++++++++---------------------
 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(+), 72 deletions(-)

Comments

Andy Shevchenko Aug. 27, 2020, 7:51 p.m. UTC | #1
On Thu, Aug 27, 2020 at 10:28 PM Krzysztof Kozlowski <krzk@kernel.org> wrote:
>
> Common pattern of handling deferred probe can be simplified with
> dev_err_probe().  Less code and also it prints the error value.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>

> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
>
> ---
>
> Changes since v1:
> 1. Convert to devm_clk_get_optional
> 2. Update also stm32-dfsdm-core and stm32-dac-core.
> 3. Wrap around 100 characters (accepted by checkpatch).
> ---
>  drivers/iio/adc/stm32-adc-core.c   | 67 +++++++++---------------------
>  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(+), 72 deletions(-)
>
> diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
> index 0e2068ec068b..707c85dab7df 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;
>                 }
>         }
> @@ -669,42 +662,20 @@ 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;
> -               }
> -               priv->aclk = NULL;
> -       }
> +       priv->aclk = devm_clk_get_optional(&pdev->dev, "adc");
> +       if (IS_ERR(priv->aclk))
> +               return dev_err_probe(&pdev->dev, PTR_ERR(priv->aclk), "Can't get 'adc' clock\n");
>
> -       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;
> -               }
> -               priv->bclk = NULL;
> -       }
> +       priv->bclk = devm_clk_get_optional(&pdev->dev, "bus");
> +       if (IS_ERR(priv->bclk))
> +               return dev_err_probe(&pdev->dev, PTR_ERR(priv->bclk), "Can't get 'bus' clock\n");
>
>         ret = stm32_adc_core_switches_probe(dev, priv);
>         if (ret)
> 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
>
diff mbox series

Patch

diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
index 0e2068ec068b..707c85dab7df 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;
 		}
 	}
@@ -669,42 +662,20 @@  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;
-		}
-		priv->aclk = NULL;
-	}
+	priv->aclk = devm_clk_get_optional(&pdev->dev, "adc");
+	if (IS_ERR(priv->aclk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(priv->aclk), "Can't get 'adc' clock\n");
 
-	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;
-		}
-		priv->bclk = NULL;
-	}
+	priv->bclk = devm_clk_get_optional(&pdev->dev, "bus");
+	if (IS_ERR(priv->bclk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(priv->bclk), "Can't get 'bus' clock\n");
 
 	ret = stm32_adc_core_switches_probe(dev, priv);
 	if (ret)
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;
 		}