[v1,1/3] iio: adc: meson_saradc: Convert to use dev_err_probe()

Commit Message

Andy Shevchenko May 31, 2022, 9:18 p.m. UTC

It's fine to call dev_err_probe() in ->probe() when error code is known.
Convert the driver to use dev_err_probe().

Signed-off-by: Andy Shevchenko <[e-mail]>
---
 drivers/iio/adc/meson_saradc.c | 51 ++++++++++++----------------------
 1 file changed, 18 insertions(+), 33 deletions(-)

Comments

Martin Blumenstingl May 31, 2022, 9:53 p.m. UTC | #1

Hi Andy,

overall this is looking great - thank you for this patch!

On Tue, May 31, 2022 at 11:18 PM Andy Shevchenko
<[e-mail]> wrote:
[...]
> +       if (IS_ERR(priv->tsc_regmap))
> +               return dev_err_probe(dev, PTR_ERR(priv->tsc_regmap), "failed to get amlogic,hhi-sysctrl regmap\n");
checkpatch complains:
  WARNING: line length of 115 exceeds 100 columns
  #44: FILE: drivers/iio/adc/meson_saradc.c:728:

Adding a line-break right before the error message will solve this problem


Best regards,
Martin

Patch

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 62cc6fb0ef85..c2abbfc1396c 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -701,6 +701,7 @@  static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
 	u8 *buf, trimming_bits, trimming_mask, upper_adc_val;
+	struct device *dev = indio_dev->dev.parent;
 	struct nvmem_cell *temperature_calib;
 	size_t read_len;
 	int ret;
@@ -717,30 +718,22 @@  static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
 		if (ret == -ENODEV)
 			return 0;
 
-		return dev_err_probe(indio_dev->dev.parent, ret,
-				     "failed to get temperature_calib cell\n");
+		return dev_err_probe(dev, ret, "failed to get temperature_calib cell\n");
 	}
 
 	priv->tsc_regmap =
 		syscon_regmap_lookup_by_phandle(indio_dev->dev.parent->of_node,
 						"amlogic,hhi-sysctrl");
-	if (IS_ERR(priv->tsc_regmap)) {
-		dev_err(indio_dev->dev.parent,
-			"failed to get amlogic,hhi-sysctrl regmap\n");
-		return PTR_ERR(priv->tsc_regmap);
-	}
+	if (IS_ERR(priv->tsc_regmap))
+		return dev_err_probe(dev, PTR_ERR(priv->tsc_regmap), "failed to get amlogic,hhi-sysctrl regmap\n");
 
 	read_len = MESON_SAR_ADC_EFUSE_BYTES;
 	buf = nvmem_cell_read(temperature_calib, &read_len);
-	if (IS_ERR(buf)) {
-		dev_err(indio_dev->dev.parent,
-			"failed to read temperature_calib cell\n");
-		return PTR_ERR(buf);
-	} else if (read_len != MESON_SAR_ADC_EFUSE_BYTES) {
+	if (IS_ERR(buf))
+		return dev_err_probe(dev, PTR_ERR(buf), "failed to read temperature_calib cell\n");
+	if (read_len != MESON_SAR_ADC_EFUSE_BYTES) {
 		kfree(buf);
-		dev_err(indio_dev->dev.parent,
-			"invalid read size of temperature_calib cell\n");
-		return -EINVAL;
+		return dev_err_probe(dev, -EINVAL, "invalid read size of temperature_calib cell\n");
 	}
 
 	trimming_bits = priv->param->temperature_trimming_bits;
@@ -765,6 +758,7 @@  static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
 static int meson_sar_adc_init(struct iio_dev *indio_dev)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *dev = indio_dev->dev.parent;
 	int regval, i, ret;
 
 	/*
@@ -888,18 +882,12 @@  static int meson_sar_adc_init(struct iio_dev *indio_dev)
 	}
 
 	ret = clk_set_parent(priv->adc_sel_clk, priv->clkin);
-	if (ret) {
-		dev_err(indio_dev->dev.parent,
-			"failed to set adc parent to clkin\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to set adc parent to clkin\n");
 
 	ret = clk_set_rate(priv->adc_clk, priv->param->clock_rate);
-	if (ret) {
-		dev_err(indio_dev->dev.parent,
-			"failed to set adc clock rate\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to set adc clock rate\n");
 
 	return 0;
 }
@@ -1186,24 +1174,21 @@  static int meson_sar_adc_probe(struct platform_device *pdev)
 {
 	const struct meson_sar_adc_data *match_data;
 	struct meson_sar_adc_priv *priv;
+	struct device *dev = &pdev->dev;
 	struct iio_dev *indio_dev;
 	void __iomem *base;
 	int irq, ret;
 
 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*priv));
-	if (!indio_dev) {
-		dev_err(&pdev->dev, "failed allocating iio device\n");
-		return -ENOMEM;
-	}
+	if (!indio_dev)
+		return dev_err_probe(dev, -ENOMEM, "failed allocating iio device\n");
 
 	priv = iio_priv(indio_dev);
 	init_completion(&priv->done);
 
 	match_data = of_device_get_match_data(&pdev->dev);
-	if (!match_data) {
-		dev_err(&pdev->dev, "failed to get match data\n");
-		return -ENODEV;
-	}
+	if (!match_data)
+		return dev_err_probe(dev, -ENODEV, "failed to get match data\n");
 
 	priv->param = match_data->param;