[PATCH v2 1/3] iio: adc: meson_saradc: Convert to use dev_err_probe()

[PATCH v2 1/3] iio: adc: meson_saradc: Convert to use dev_err_probe()

[Andy Shevchenko]

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 <andriy.shevchenko@linux.intel.com>
---
v2: split long line (Martin)
 drivers/iio/adc/meson_saradc.c | 52 +++++++++++++---------------------
 1 file changed, 19 insertions(+), 33 deletions(-)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 62cc6fb0ef85..a2e83eca03e8 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 +718,23 @@ 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 +759,7 @@ 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 +883,12 @@ 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 +1175,21 @@ 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;
 
-- 
2.35.1

[PATCH v2 1/3] iio: adc: meson_saradc: Convert to use dev_err_probe()

[Andy Shevchenko]

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 <andriy.shevchenko@linux.intel.com>
---
v2: split long line (Martin)
 drivers/iio/adc/meson_saradc.c | 52 +++++++++++++---------------------
 1 file changed, 19 insertions(+), 33 deletions(-)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 62cc6fb0ef85..a2e83eca03e8 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 +718,23 @@ 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 +759,7 @@ 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 +883,12 @@ 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 +1175,21 @@ 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;
 
-- 
2.35.1


_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic

[PATCH v2 1/3] iio: adc: meson_saradc: Convert to use dev_err_probe()

[Andy Shevchenko]

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 <andriy.shevchenko@linux.intel.com>
---
v2: split long line (Martin)
 drivers/iio/adc/meson_saradc.c | 52 +++++++++++++---------------------
 1 file changed, 19 insertions(+), 33 deletions(-)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 62cc6fb0ef85..a2e83eca03e8 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 +718,23 @@ 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 +759,7 @@ 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 +883,12 @@ 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 +1175,21 @@ 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;
 
-- 
2.35.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v2 2/3] iio: adc: meson_saradc: Use devm_clk_get_optional()

[Andy Shevchenko]

Replace open coded variants of devm_clk_get_optional().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
v2: added tag (Martin)
 drivers/iio/adc/meson_saradc.c | 22 ++++++----------------
 1 file changed, 6 insertions(+), 16 deletions(-)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index a2e83eca03e8..e0762103c869 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -1225,23 +1225,13 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, PTR_ERR(priv->core_clk),
 				     "failed to get core clk\n");
 
-	priv->adc_clk = devm_clk_get(&pdev->dev, "adc_clk");
-	if (IS_ERR(priv->adc_clk)) {
-		if (PTR_ERR(priv->adc_clk) == -ENOENT)
-			priv->adc_clk = NULL;
-		else
-			return dev_err_probe(&pdev->dev, PTR_ERR(priv->adc_clk),
-					     "failed to get adc clk\n");
-	}
+	priv->adc_clk = devm_clk_get_optional(dev, "adc_clk");
+	if (IS_ERR(priv->adc_clk))
+		return dev_err_probe(dev, PTR_ERR(priv->adc_clk), "failed to get adc clk\n");
 
-	priv->adc_sel_clk = devm_clk_get(&pdev->dev, "adc_sel");
-	if (IS_ERR(priv->adc_sel_clk)) {
-		if (PTR_ERR(priv->adc_sel_clk) == -ENOENT)
-			priv->adc_sel_clk = NULL;
-		else
-			return dev_err_probe(&pdev->dev, PTR_ERR(priv->adc_sel_clk),
-					     "failed to get adc_sel clk\n");
-	}
+	priv->adc_sel_clk = devm_clk_get_optional(dev, "adc_sel");
+	if (IS_ERR(priv->adc_sel_clk))
+		return dev_err_probe(dev, PTR_ERR(priv->adc_sel_clk), "failed to get adc_sel clk\n");
 
 	/* on pre-GXBB SoCs the SAR ADC itself provides the ADC clock: */
 	if (!priv->adc_clk) {
-- 
2.35.1

[PATCH v2 2/3] iio: adc: meson_saradc: Use devm_clk_get_optional()

[Andy Shevchenko]

Replace open coded variants of devm_clk_get_optional().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
v2: added tag (Martin)
 drivers/iio/adc/meson_saradc.c | 22 ++++++----------------
 1 file changed, 6 insertions(+), 16 deletions(-)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index a2e83eca03e8..e0762103c869 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -1225,23 +1225,13 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, PTR_ERR(priv->core_clk),
 				     "failed to get core clk\n");
 
-	priv->adc_clk = devm_clk_get(&pdev->dev, "adc_clk");
-	if (IS_ERR(priv->adc_clk)) {
-		if (PTR_ERR(priv->adc_clk) == -ENOENT)
-			priv->adc_clk = NULL;
-		else
-			return dev_err_probe(&pdev->dev, PTR_ERR(priv->adc_clk),
-					     "failed to get adc clk\n");
-	}
+	priv->adc_clk = devm_clk_get_optional(dev, "adc_clk");
+	if (IS_ERR(priv->adc_clk))
+		return dev_err_probe(dev, PTR_ERR(priv->adc_clk), "failed to get adc clk\n");
 
-	priv->adc_sel_clk = devm_clk_get(&pdev->dev, "adc_sel");
-	if (IS_ERR(priv->adc_sel_clk)) {
-		if (PTR_ERR(priv->adc_sel_clk) == -ENOENT)
-			priv->adc_sel_clk = NULL;
-		else
-			return dev_err_probe(&pdev->dev, PTR_ERR(priv->adc_sel_clk),
-					     "failed to get adc_sel clk\n");
-	}
+	priv->adc_sel_clk = devm_clk_get_optional(dev, "adc_sel");
+	if (IS_ERR(priv->adc_sel_clk))
+		return dev_err_probe(dev, PTR_ERR(priv->adc_sel_clk), "failed to get adc_sel clk\n");
 
 	/* on pre-GXBB SoCs the SAR ADC itself provides the ADC clock: */
 	if (!priv->adc_clk) {
-- 
2.35.1


_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic

[PATCH v2 2/3] iio: adc: meson_saradc: Use devm_clk_get_optional()

[Andy Shevchenko]

Replace open coded variants of devm_clk_get_optional().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
v2: added tag (Martin)
 drivers/iio/adc/meson_saradc.c | 22 ++++++----------------
 1 file changed, 6 insertions(+), 16 deletions(-)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index a2e83eca03e8..e0762103c869 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -1225,23 +1225,13 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, PTR_ERR(priv->core_clk),
 				     "failed to get core clk\n");
 
-	priv->adc_clk = devm_clk_get(&pdev->dev, "adc_clk");
-	if (IS_ERR(priv->adc_clk)) {
-		if (PTR_ERR(priv->adc_clk) == -ENOENT)
-			priv->adc_clk = NULL;
-		else
-			return dev_err_probe(&pdev->dev, PTR_ERR(priv->adc_clk),
-					     "failed to get adc clk\n");
-	}
+	priv->adc_clk = devm_clk_get_optional(dev, "adc_clk");
+	if (IS_ERR(priv->adc_clk))
+		return dev_err_probe(dev, PTR_ERR(priv->adc_clk), "failed to get adc clk\n");
 
-	priv->adc_sel_clk = devm_clk_get(&pdev->dev, "adc_sel");
-	if (IS_ERR(priv->adc_sel_clk)) {
-		if (PTR_ERR(priv->adc_sel_clk) == -ENOENT)
-			priv->adc_sel_clk = NULL;
-		else
-			return dev_err_probe(&pdev->dev, PTR_ERR(priv->adc_sel_clk),
-					     "failed to get adc_sel clk\n");
-	}
+	priv->adc_sel_clk = devm_clk_get_optional(dev, "adc_sel");
+	if (IS_ERR(priv->adc_sel_clk))
+		return dev_err_probe(dev, PTR_ERR(priv->adc_sel_clk), "failed to get adc_sel clk\n");
 
 	/* on pre-GXBB SoCs the SAR ADC itself provides the ADC clock: */
 	if (!priv->adc_clk) {
-- 
2.35.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for struct device

[Andy Shevchenko]

Use temporary variable for struct device to make code neater.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2: fixed typo (LKP, Martin)

The Martin's idea about iio specific prints still can be discussed before
or after applying this, I have no preference. That said, this change can be
postponed.

 drivers/iio/adc/meson_saradc.c | 73 +++++++++++++++-------------------
 1 file changed, 31 insertions(+), 42 deletions(-)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index e0762103c869..c66f1e978c3c 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -345,6 +345,7 @@ static int meson_sar_adc_read_raw_sample(struct iio_dev *indio_dev,
 					 int *val)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *idev = &indio_dev->dev;
 	int regval, fifo_chan, fifo_val, count;
 
 	if (!wait_for_completion_timeout(&priv->done,
@@ -353,16 +354,14 @@ static int meson_sar_adc_read_raw_sample(struct iio_dev *indio_dev,
 
 	count = meson_sar_adc_get_fifo_count(indio_dev);
 	if (count != 1) {
-		dev_err(&indio_dev->dev,
-			"ADC FIFO has %d element(s) instead of one\n", count);
+		dev_err(idev, "ADC FIFO has %d element(s) instead of one\n", count);
 		return -EINVAL;
 	}
 
 	regmap_read(priv->regmap, MESON_SAR_ADC_FIFO_RD, &regval);
 	fifo_chan = FIELD_GET(MESON_SAR_ADC_FIFO_RD_CHAN_ID_MASK, regval);
 	if (fifo_chan != chan->address) {
-		dev_err(&indio_dev->dev,
-			"ADC FIFO entry belongs to channel %d instead of %lu\n",
+		dev_err(idev, "ADC FIFO entry belongs to channel %d instead of %lu\n",
 			fifo_chan, chan->address);
 		return -EINVAL;
 	}
@@ -550,6 +549,7 @@ static int meson_sar_adc_get_sample(struct iio_dev *indio_dev,
 				    int *val)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *dev = indio_dev->dev.parent;
 	int ret;
 
 	if (chan->type == IIO_TEMP && !priv->temperature_sensor_calibrated)
@@ -573,8 +573,7 @@ static int meson_sar_adc_get_sample(struct iio_dev *indio_dev,
 	meson_sar_adc_unlock(indio_dev);
 
 	if (ret) {
-		dev_warn(indio_dev->dev.parent,
-			 "failed to read sample for channel %lu: %d\n",
+		dev_warn(dev, "failed to read sample for channel %lu: %d\n",
 			 chan->address, ret);
 		return ret;
 	}
@@ -587,6 +586,7 @@ static int meson_sar_adc_iio_info_read_raw(struct iio_dev *indio_dev,
 					   int *val, int *val2, long mask)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *dev = indio_dev->dev.parent;
 	int ret;
 
 	switch (mask) {
@@ -603,9 +603,7 @@ static int meson_sar_adc_iio_info_read_raw(struct iio_dev *indio_dev,
 		if (chan->type == IIO_VOLTAGE) {
 			ret = regulator_get_voltage(priv->vref);
 			if (ret < 0) {
-				dev_err(indio_dev->dev.parent,
-					"failed to get vref voltage: %d\n",
-					ret);
+				dev_err(dev, "failed to get vref voltage: %d\n", ret);
 				return ret;
 			}
 
@@ -650,11 +648,12 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
 				  void __iomem *base)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *idev = &indio_dev->dev;
+	struct device *dev = idev->parent;
 	struct clk_init_data init;
 	const char *clk_parents[1];
 
-	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%s#adc_div",
-				   dev_name(indio_dev->dev.parent));
+	init.name = devm_kasprintf(idev, GFP_KERNEL, "%s#adc_div", dev_name(dev));
 	if (!init.name)
 		return -ENOMEM;
 
@@ -670,13 +669,11 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
 	priv->clk_div.hw.init = &init;
 	priv->clk_div.flags = 0;
 
-	priv->adc_div_clk = devm_clk_register(&indio_dev->dev,
-					      &priv->clk_div.hw);
+	priv->adc_div_clk = devm_clk_register(idev, &priv->clk_div.hw);
 	if (WARN_ON(IS_ERR(priv->adc_div_clk)))
 		return PTR_ERR(priv->adc_div_clk);
 
-	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%s#adc_en",
-				   dev_name(indio_dev->dev.parent));
+	init.name = devm_kasprintf(idev, GFP_KERNEL, "%s#adc_en", dev_name(dev));
 	if (!init.name)
 		return -ENOMEM;
 
@@ -690,7 +687,7 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
 	priv->clk_gate.bit_idx = __ffs(MESON_SAR_ADC_REG3_CLK_EN);
 	priv->clk_gate.hw.init = &init;
 
-	priv->adc_clk = devm_clk_register(&indio_dev->dev, &priv->clk_gate.hw);
+	priv->adc_clk = devm_clk_register(idev, &priv->clk_gate.hw);
 	if (WARN_ON(IS_ERR(priv->adc_clk)))
 		return PTR_ERR(priv->adc_clk);
 
@@ -706,8 +703,7 @@ static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
 	size_t read_len;
 	int ret;
 
-	temperature_calib = devm_nvmem_cell_get(indio_dev->dev.parent,
-						"temperature_calib");
+	temperature_calib = devm_nvmem_cell_get(dev, "temperature_calib");
 	if (IS_ERR(temperature_calib)) {
 		ret = PTR_ERR(temperature_calib);
 
@@ -721,9 +717,7 @@ static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
 		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");
+	priv->tsc_regmap = syscon_regmap_lookup_by_phandle(dev->of_node, "amlogic,hhi-sysctrl");
 	if (IS_ERR(priv->tsc_regmap))
 		return dev_err_probe(dev, PTR_ERR(priv->tsc_regmap),
 				     "failed to get amlogic,hhi-sysctrl regmap\n");
@@ -911,6 +905,7 @@ static void meson_sar_adc_set_bandgap(struct iio_dev *indio_dev, bool on_off)
 static int meson_sar_adc_hw_enable(struct iio_dev *indio_dev)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *dev = indio_dev->dev.parent;
 	int ret;
 	u32 regval;
 
@@ -920,14 +915,13 @@ static int meson_sar_adc_hw_enable(struct iio_dev *indio_dev)
 
 	ret = regulator_enable(priv->vref);
 	if (ret < 0) {
-		dev_err(indio_dev->dev.parent,
-			"failed to enable vref regulator\n");
+		dev_err(dev, "failed to enable vref regulator\n");
 		goto err_vref;
 	}
 
 	ret = clk_prepare_enable(priv->core_clk);
 	if (ret) {
-		dev_err(indio_dev->dev.parent, "failed to enable core clk\n");
+		dev_err(dev, "failed to enable core clk\n");
 		goto err_core_clk;
 	}
 
@@ -945,7 +939,7 @@ static int meson_sar_adc_hw_enable(struct iio_dev *indio_dev)
 
 	ret = clk_prepare_enable(priv->adc_clk);
 	if (ret) {
-		dev_err(indio_dev->dev.parent, "failed to enable adc clk\n");
+		dev_err(dev, "failed to enable adc clk\n");
 		goto err_adc_clk;
 	}
 
@@ -1180,14 +1174,14 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 	void __iomem *base;
 	int irq, ret;
 
-	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*priv));
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*priv));
 	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);
+	match_data = of_device_get_match_data(dev);
 	if (!match_data)
 		return dev_err_probe(dev, -ENODEV, "failed to get match data\n");
 
@@ -1201,29 +1195,25 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	priv->regmap = devm_regmap_init_mmio(&pdev->dev, base,
-					     priv->param->regmap_config);
+	priv->regmap = devm_regmap_init_mmio(dev, base, priv->param->regmap_config);
 	if (IS_ERR(priv->regmap))
 		return PTR_ERR(priv->regmap);
 
-	irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
+	irq = irq_of_parse_and_map(dev->of_node, 0);
 	if (!irq)
 		return -EINVAL;
 
-	ret = devm_request_irq(&pdev->dev, irq, meson_sar_adc_irq, IRQF_SHARED,
-			       dev_name(&pdev->dev), indio_dev);
+	ret = devm_request_irq(dev, irq, meson_sar_adc_irq, IRQF_SHARED, dev_name(dev), indio_dev);
 	if (ret)
 		return ret;
 
-	priv->clkin = devm_clk_get(&pdev->dev, "clkin");
+	priv->clkin = devm_clk_get(dev, "clkin");
 	if (IS_ERR(priv->clkin))
-		return dev_err_probe(&pdev->dev, PTR_ERR(priv->clkin),
-				     "failed to get clkin\n");
+		return dev_err_probe(dev, PTR_ERR(priv->clkin), "failed to get clkin\n");
 
-	priv->core_clk = devm_clk_get(&pdev->dev, "core");
+	priv->core_clk = devm_clk_get(dev, "core");
 	if (IS_ERR(priv->core_clk))
-		return dev_err_probe(&pdev->dev, PTR_ERR(priv->core_clk),
-				     "failed to get core clk\n");
+		return dev_err_probe(dev, PTR_ERR(priv->core_clk), "failed to get core clk\n");
 
 	priv->adc_clk = devm_clk_get_optional(dev, "adc_clk");
 	if (IS_ERR(priv->adc_clk))
@@ -1240,10 +1230,9 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 			return ret;
 	}
 
-	priv->vref = devm_regulator_get(&pdev->dev, "vref");
+	priv->vref = devm_regulator_get(dev, "vref");
 	if (IS_ERR(priv->vref))
-		return dev_err_probe(&pdev->dev, PTR_ERR(priv->vref),
-				     "failed to get vref regulator\n");
+		return dev_err_probe(dev, PTR_ERR(priv->vref), "failed to get vref regulator\n");
 
 	priv->calibscale = MILLION;
 
@@ -1273,7 +1262,7 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 
 	ret = meson_sar_adc_calib(indio_dev);
 	if (ret)
-		dev_warn(&pdev->dev, "calibration failed\n");
+		dev_warn(dev, "calibration failed\n");
 
 	platform_set_drvdata(pdev, indio_dev);
 
-- 
2.35.1

[PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for struct device

[Andy Shevchenko]

Use temporary variable for struct device to make code neater.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2: fixed typo (LKP, Martin)

The Martin's idea about iio specific prints still can be discussed before
or after applying this, I have no preference. That said, this change can be
postponed.

 drivers/iio/adc/meson_saradc.c | 73 +++++++++++++++-------------------
 1 file changed, 31 insertions(+), 42 deletions(-)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index e0762103c869..c66f1e978c3c 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -345,6 +345,7 @@ static int meson_sar_adc_read_raw_sample(struct iio_dev *indio_dev,
 					 int *val)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *idev = &indio_dev->dev;
 	int regval, fifo_chan, fifo_val, count;
 
 	if (!wait_for_completion_timeout(&priv->done,
@@ -353,16 +354,14 @@ static int meson_sar_adc_read_raw_sample(struct iio_dev *indio_dev,
 
 	count = meson_sar_adc_get_fifo_count(indio_dev);
 	if (count != 1) {
-		dev_err(&indio_dev->dev,
-			"ADC FIFO has %d element(s) instead of one\n", count);
+		dev_err(idev, "ADC FIFO has %d element(s) instead of one\n", count);
 		return -EINVAL;
 	}
 
 	regmap_read(priv->regmap, MESON_SAR_ADC_FIFO_RD, &regval);
 	fifo_chan = FIELD_GET(MESON_SAR_ADC_FIFO_RD_CHAN_ID_MASK, regval);
 	if (fifo_chan != chan->address) {
-		dev_err(&indio_dev->dev,
-			"ADC FIFO entry belongs to channel %d instead of %lu\n",
+		dev_err(idev, "ADC FIFO entry belongs to channel %d instead of %lu\n",
 			fifo_chan, chan->address);
 		return -EINVAL;
 	}
@@ -550,6 +549,7 @@ static int meson_sar_adc_get_sample(struct iio_dev *indio_dev,
 				    int *val)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *dev = indio_dev->dev.parent;
 	int ret;
 
 	if (chan->type == IIO_TEMP && !priv->temperature_sensor_calibrated)
@@ -573,8 +573,7 @@ static int meson_sar_adc_get_sample(struct iio_dev *indio_dev,
 	meson_sar_adc_unlock(indio_dev);
 
 	if (ret) {
-		dev_warn(indio_dev->dev.parent,
-			 "failed to read sample for channel %lu: %d\n",
+		dev_warn(dev, "failed to read sample for channel %lu: %d\n",
 			 chan->address, ret);
 		return ret;
 	}
@@ -587,6 +586,7 @@ static int meson_sar_adc_iio_info_read_raw(struct iio_dev *indio_dev,
 					   int *val, int *val2, long mask)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *dev = indio_dev->dev.parent;
 	int ret;
 
 	switch (mask) {
@@ -603,9 +603,7 @@ static int meson_sar_adc_iio_info_read_raw(struct iio_dev *indio_dev,
 		if (chan->type == IIO_VOLTAGE) {
 			ret = regulator_get_voltage(priv->vref);
 			if (ret < 0) {
-				dev_err(indio_dev->dev.parent,
-					"failed to get vref voltage: %d\n",
-					ret);
+				dev_err(dev, "failed to get vref voltage: %d\n", ret);
 				return ret;
 			}
 
@@ -650,11 +648,12 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
 				  void __iomem *base)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *idev = &indio_dev->dev;
+	struct device *dev = idev->parent;
 	struct clk_init_data init;
 	const char *clk_parents[1];
 
-	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%s#adc_div",
-				   dev_name(indio_dev->dev.parent));
+	init.name = devm_kasprintf(idev, GFP_KERNEL, "%s#adc_div", dev_name(dev));
 	if (!init.name)
 		return -ENOMEM;
 
@@ -670,13 +669,11 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
 	priv->clk_div.hw.init = &init;
 	priv->clk_div.flags = 0;
 
-	priv->adc_div_clk = devm_clk_register(&indio_dev->dev,
-					      &priv->clk_div.hw);
+	priv->adc_div_clk = devm_clk_register(idev, &priv->clk_div.hw);
 	if (WARN_ON(IS_ERR(priv->adc_div_clk)))
 		return PTR_ERR(priv->adc_div_clk);
 
-	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%s#adc_en",
-				   dev_name(indio_dev->dev.parent));
+	init.name = devm_kasprintf(idev, GFP_KERNEL, "%s#adc_en", dev_name(dev));
 	if (!init.name)
 		return -ENOMEM;
 
@@ -690,7 +687,7 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
 	priv->clk_gate.bit_idx = __ffs(MESON_SAR_ADC_REG3_CLK_EN);
 	priv->clk_gate.hw.init = &init;
 
-	priv->adc_clk = devm_clk_register(&indio_dev->dev, &priv->clk_gate.hw);
+	priv->adc_clk = devm_clk_register(idev, &priv->clk_gate.hw);
 	if (WARN_ON(IS_ERR(priv->adc_clk)))
 		return PTR_ERR(priv->adc_clk);
 
@@ -706,8 +703,7 @@ static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
 	size_t read_len;
 	int ret;
 
-	temperature_calib = devm_nvmem_cell_get(indio_dev->dev.parent,
-						"temperature_calib");
+	temperature_calib = devm_nvmem_cell_get(dev, "temperature_calib");
 	if (IS_ERR(temperature_calib)) {
 		ret = PTR_ERR(temperature_calib);
 
@@ -721,9 +717,7 @@ static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
 		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");
+	priv->tsc_regmap = syscon_regmap_lookup_by_phandle(dev->of_node, "amlogic,hhi-sysctrl");
 	if (IS_ERR(priv->tsc_regmap))
 		return dev_err_probe(dev, PTR_ERR(priv->tsc_regmap),
 				     "failed to get amlogic,hhi-sysctrl regmap\n");
@@ -911,6 +905,7 @@ static void meson_sar_adc_set_bandgap(struct iio_dev *indio_dev, bool on_off)
 static int meson_sar_adc_hw_enable(struct iio_dev *indio_dev)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *dev = indio_dev->dev.parent;
 	int ret;
 	u32 regval;
 
@@ -920,14 +915,13 @@ static int meson_sar_adc_hw_enable(struct iio_dev *indio_dev)
 
 	ret = regulator_enable(priv->vref);
 	if (ret < 0) {
-		dev_err(indio_dev->dev.parent,
-			"failed to enable vref regulator\n");
+		dev_err(dev, "failed to enable vref regulator\n");
 		goto err_vref;
 	}
 
 	ret = clk_prepare_enable(priv->core_clk);
 	if (ret) {
-		dev_err(indio_dev->dev.parent, "failed to enable core clk\n");
+		dev_err(dev, "failed to enable core clk\n");
 		goto err_core_clk;
 	}
 
@@ -945,7 +939,7 @@ static int meson_sar_adc_hw_enable(struct iio_dev *indio_dev)
 
 	ret = clk_prepare_enable(priv->adc_clk);
 	if (ret) {
-		dev_err(indio_dev->dev.parent, "failed to enable adc clk\n");
+		dev_err(dev, "failed to enable adc clk\n");
 		goto err_adc_clk;
 	}
 
@@ -1180,14 +1174,14 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 	void __iomem *base;
 	int irq, ret;
 
-	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*priv));
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*priv));
 	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);
+	match_data = of_device_get_match_data(dev);
 	if (!match_data)
 		return dev_err_probe(dev, -ENODEV, "failed to get match data\n");
 
@@ -1201,29 +1195,25 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	priv->regmap = devm_regmap_init_mmio(&pdev->dev, base,
-					     priv->param->regmap_config);
+	priv->regmap = devm_regmap_init_mmio(dev, base, priv->param->regmap_config);
 	if (IS_ERR(priv->regmap))
 		return PTR_ERR(priv->regmap);
 
-	irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
+	irq = irq_of_parse_and_map(dev->of_node, 0);
 	if (!irq)
 		return -EINVAL;
 
-	ret = devm_request_irq(&pdev->dev, irq, meson_sar_adc_irq, IRQF_SHARED,
-			       dev_name(&pdev->dev), indio_dev);
+	ret = devm_request_irq(dev, irq, meson_sar_adc_irq, IRQF_SHARED, dev_name(dev), indio_dev);
 	if (ret)
 		return ret;
 
-	priv->clkin = devm_clk_get(&pdev->dev, "clkin");
+	priv->clkin = devm_clk_get(dev, "clkin");
 	if (IS_ERR(priv->clkin))
-		return dev_err_probe(&pdev->dev, PTR_ERR(priv->clkin),
-				     "failed to get clkin\n");
+		return dev_err_probe(dev, PTR_ERR(priv->clkin), "failed to get clkin\n");
 
-	priv->core_clk = devm_clk_get(&pdev->dev, "core");
+	priv->core_clk = devm_clk_get(dev, "core");
 	if (IS_ERR(priv->core_clk))
-		return dev_err_probe(&pdev->dev, PTR_ERR(priv->core_clk),
-				     "failed to get core clk\n");
+		return dev_err_probe(dev, PTR_ERR(priv->core_clk), "failed to get core clk\n");
 
 	priv->adc_clk = devm_clk_get_optional(dev, "adc_clk");
 	if (IS_ERR(priv->adc_clk))
@@ -1240,10 +1230,9 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 			return ret;
 	}
 
-	priv->vref = devm_regulator_get(&pdev->dev, "vref");
+	priv->vref = devm_regulator_get(dev, "vref");
 	if (IS_ERR(priv->vref))
-		return dev_err_probe(&pdev->dev, PTR_ERR(priv->vref),
-				     "failed to get vref regulator\n");
+		return dev_err_probe(dev, PTR_ERR(priv->vref), "failed to get vref regulator\n");
 
 	priv->calibscale = MILLION;
 
@@ -1273,7 +1262,7 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 
 	ret = meson_sar_adc_calib(indio_dev);
 	if (ret)
-		dev_warn(&pdev->dev, "calibration failed\n");
+		dev_warn(dev, "calibration failed\n");
 
 	platform_set_drvdata(pdev, indio_dev);
 
-- 
2.35.1


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[PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for struct device

[Andy Shevchenko]

Use temporary variable for struct device to make code neater.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2: fixed typo (LKP, Martin)

The Martin's idea about iio specific prints still can be discussed before
or after applying this, I have no preference. That said, this change can be
postponed.

 drivers/iio/adc/meson_saradc.c | 73 +++++++++++++++-------------------
 1 file changed, 31 insertions(+), 42 deletions(-)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index e0762103c869..c66f1e978c3c 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -345,6 +345,7 @@ static int meson_sar_adc_read_raw_sample(struct iio_dev *indio_dev,
 					 int *val)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *idev = &indio_dev->dev;
 	int regval, fifo_chan, fifo_val, count;
 
 	if (!wait_for_completion_timeout(&priv->done,
@@ -353,16 +354,14 @@ static int meson_sar_adc_read_raw_sample(struct iio_dev *indio_dev,
 
 	count = meson_sar_adc_get_fifo_count(indio_dev);
 	if (count != 1) {
-		dev_err(&indio_dev->dev,
-			"ADC FIFO has %d element(s) instead of one\n", count);
+		dev_err(idev, "ADC FIFO has %d element(s) instead of one\n", count);
 		return -EINVAL;
 	}
 
 	regmap_read(priv->regmap, MESON_SAR_ADC_FIFO_RD, &regval);
 	fifo_chan = FIELD_GET(MESON_SAR_ADC_FIFO_RD_CHAN_ID_MASK, regval);
 	if (fifo_chan != chan->address) {
-		dev_err(&indio_dev->dev,
-			"ADC FIFO entry belongs to channel %d instead of %lu\n",
+		dev_err(idev, "ADC FIFO entry belongs to channel %d instead of %lu\n",
 			fifo_chan, chan->address);
 		return -EINVAL;
 	}
@@ -550,6 +549,7 @@ static int meson_sar_adc_get_sample(struct iio_dev *indio_dev,
 				    int *val)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *dev = indio_dev->dev.parent;
 	int ret;
 
 	if (chan->type == IIO_TEMP && !priv->temperature_sensor_calibrated)
@@ -573,8 +573,7 @@ static int meson_sar_adc_get_sample(struct iio_dev *indio_dev,
 	meson_sar_adc_unlock(indio_dev);
 
 	if (ret) {
-		dev_warn(indio_dev->dev.parent,
-			 "failed to read sample for channel %lu: %d\n",
+		dev_warn(dev, "failed to read sample for channel %lu: %d\n",
 			 chan->address, ret);
 		return ret;
 	}
@@ -587,6 +586,7 @@ static int meson_sar_adc_iio_info_read_raw(struct iio_dev *indio_dev,
 					   int *val, int *val2, long mask)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *dev = indio_dev->dev.parent;
 	int ret;
 
 	switch (mask) {
@@ -603,9 +603,7 @@ static int meson_sar_adc_iio_info_read_raw(struct iio_dev *indio_dev,
 		if (chan->type == IIO_VOLTAGE) {
 			ret = regulator_get_voltage(priv->vref);
 			if (ret < 0) {
-				dev_err(indio_dev->dev.parent,
-					"failed to get vref voltage: %d\n",
-					ret);
+				dev_err(dev, "failed to get vref voltage: %d\n", ret);
 				return ret;
 			}
 
@@ -650,11 +648,12 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
 				  void __iomem *base)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *idev = &indio_dev->dev;
+	struct device *dev = idev->parent;
 	struct clk_init_data init;
 	const char *clk_parents[1];
 
-	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%s#adc_div",
-				   dev_name(indio_dev->dev.parent));
+	init.name = devm_kasprintf(idev, GFP_KERNEL, "%s#adc_div", dev_name(dev));
 	if (!init.name)
 		return -ENOMEM;
 
@@ -670,13 +669,11 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
 	priv->clk_div.hw.init = &init;
 	priv->clk_div.flags = 0;
 
-	priv->adc_div_clk = devm_clk_register(&indio_dev->dev,
-					      &priv->clk_div.hw);
+	priv->adc_div_clk = devm_clk_register(idev, &priv->clk_div.hw);
 	if (WARN_ON(IS_ERR(priv->adc_div_clk)))
 		return PTR_ERR(priv->adc_div_clk);
 
-	init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%s#adc_en",
-				   dev_name(indio_dev->dev.parent));
+	init.name = devm_kasprintf(idev, GFP_KERNEL, "%s#adc_en", dev_name(dev));
 	if (!init.name)
 		return -ENOMEM;
 
@@ -690,7 +687,7 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
 	priv->clk_gate.bit_idx = __ffs(MESON_SAR_ADC_REG3_CLK_EN);
 	priv->clk_gate.hw.init = &init;
 
-	priv->adc_clk = devm_clk_register(&indio_dev->dev, &priv->clk_gate.hw);
+	priv->adc_clk = devm_clk_register(idev, &priv->clk_gate.hw);
 	if (WARN_ON(IS_ERR(priv->adc_clk)))
 		return PTR_ERR(priv->adc_clk);
 
@@ -706,8 +703,7 @@ static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
 	size_t read_len;
 	int ret;
 
-	temperature_calib = devm_nvmem_cell_get(indio_dev->dev.parent,
-						"temperature_calib");
+	temperature_calib = devm_nvmem_cell_get(dev, "temperature_calib");
 	if (IS_ERR(temperature_calib)) {
 		ret = PTR_ERR(temperature_calib);
 
@@ -721,9 +717,7 @@ static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
 		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");
+	priv->tsc_regmap = syscon_regmap_lookup_by_phandle(dev->of_node, "amlogic,hhi-sysctrl");
 	if (IS_ERR(priv->tsc_regmap))
 		return dev_err_probe(dev, PTR_ERR(priv->tsc_regmap),
 				     "failed to get amlogic,hhi-sysctrl regmap\n");
@@ -911,6 +905,7 @@ static void meson_sar_adc_set_bandgap(struct iio_dev *indio_dev, bool on_off)
 static int meson_sar_adc_hw_enable(struct iio_dev *indio_dev)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+	struct device *dev = indio_dev->dev.parent;
 	int ret;
 	u32 regval;
 
@@ -920,14 +915,13 @@ static int meson_sar_adc_hw_enable(struct iio_dev *indio_dev)
 
 	ret = regulator_enable(priv->vref);
 	if (ret < 0) {
-		dev_err(indio_dev->dev.parent,
-			"failed to enable vref regulator\n");
+		dev_err(dev, "failed to enable vref regulator\n");
 		goto err_vref;
 	}
 
 	ret = clk_prepare_enable(priv->core_clk);
 	if (ret) {
-		dev_err(indio_dev->dev.parent, "failed to enable core clk\n");
+		dev_err(dev, "failed to enable core clk\n");
 		goto err_core_clk;
 	}
 
@@ -945,7 +939,7 @@ static int meson_sar_adc_hw_enable(struct iio_dev *indio_dev)
 
 	ret = clk_prepare_enable(priv->adc_clk);
 	if (ret) {
-		dev_err(indio_dev->dev.parent, "failed to enable adc clk\n");
+		dev_err(dev, "failed to enable adc clk\n");
 		goto err_adc_clk;
 	}
 
@@ -1180,14 +1174,14 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 	void __iomem *base;
 	int irq, ret;
 
-	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*priv));
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*priv));
 	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);
+	match_data = of_device_get_match_data(dev);
 	if (!match_data)
 		return dev_err_probe(dev, -ENODEV, "failed to get match data\n");
 
@@ -1201,29 +1195,25 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	priv->regmap = devm_regmap_init_mmio(&pdev->dev, base,
-					     priv->param->regmap_config);
+	priv->regmap = devm_regmap_init_mmio(dev, base, priv->param->regmap_config);
 	if (IS_ERR(priv->regmap))
 		return PTR_ERR(priv->regmap);
 
-	irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
+	irq = irq_of_parse_and_map(dev->of_node, 0);
 	if (!irq)
 		return -EINVAL;
 
-	ret = devm_request_irq(&pdev->dev, irq, meson_sar_adc_irq, IRQF_SHARED,
-			       dev_name(&pdev->dev), indio_dev);
+	ret = devm_request_irq(dev, irq, meson_sar_adc_irq, IRQF_SHARED, dev_name(dev), indio_dev);
 	if (ret)
 		return ret;
 
-	priv->clkin = devm_clk_get(&pdev->dev, "clkin");
+	priv->clkin = devm_clk_get(dev, "clkin");
 	if (IS_ERR(priv->clkin))
-		return dev_err_probe(&pdev->dev, PTR_ERR(priv->clkin),
-				     "failed to get clkin\n");
+		return dev_err_probe(dev, PTR_ERR(priv->clkin), "failed to get clkin\n");
 
-	priv->core_clk = devm_clk_get(&pdev->dev, "core");
+	priv->core_clk = devm_clk_get(dev, "core");
 	if (IS_ERR(priv->core_clk))
-		return dev_err_probe(&pdev->dev, PTR_ERR(priv->core_clk),
-				     "failed to get core clk\n");
+		return dev_err_probe(dev, PTR_ERR(priv->core_clk), "failed to get core clk\n");
 
 	priv->adc_clk = devm_clk_get_optional(dev, "adc_clk");
 	if (IS_ERR(priv->adc_clk))
@@ -1240,10 +1230,9 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 			return ret;
 	}
 
-	priv->vref = devm_regulator_get(&pdev->dev, "vref");
+	priv->vref = devm_regulator_get(dev, "vref");
 	if (IS_ERR(priv->vref))
-		return dev_err_probe(&pdev->dev, PTR_ERR(priv->vref),
-				     "failed to get vref regulator\n");
+		return dev_err_probe(dev, PTR_ERR(priv->vref), "failed to get vref regulator\n");
 
 	priv->calibscale = MILLION;
 
@@ -1273,7 +1262,7 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 
 	ret = meson_sar_adc_calib(indio_dev);
 	if (ret)
-		dev_warn(&pdev->dev, "calibration failed\n");
+		dev_warn(dev, "calibration failed\n");
 
 	platform_set_drvdata(pdev, indio_dev);
 
-- 
2.35.1


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Re: [PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for struct device

[Lars-Peter Clausen]

On 6/2/22 13:42, Andy Shevchenko wrote:
return -ENOMEM;
>   
> @@ -690,7 +687,7 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
>   	priv->clk_gate.bit_idx = __ffs(MESON_SAR_ADC_REG3_CLK_EN);
>   	priv->clk_gate.hw.init = &init;
>   
> -	priv->adc_clk = devm_clk_register(&indio_dev->dev, &priv->clk_gate.hw);
> +	priv->adc_clk = devm_clk_register(idev, &priv->clk_gate.hw);

You are not changing anything here. But we shouldn't be devm'ing on the 
IIO device. It will get freed eventually, but only when the last 
reference to the iio device has been dropped, which might be long after 
the platform device has been removed. devm'ing should happen on the 
platform_device's device. Might be worth fixing.

>   	if (WARN_ON(IS_ERR(priv->adc_clk)))
>   		return PTR_ERR(priv->adc_clk);
>   
> @@ -706,8 +703,7 @@ static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
>   	size_t read_len;
>   	

Re: [PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for struct device

[Lars-Peter Clausen]

On 6/2/22 13:42, Andy Shevchenko wrote:
return -ENOMEM;
>   
> @@ -690,7 +687,7 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
>   	priv->clk_gate.bit_idx = __ffs(MESON_SAR_ADC_REG3_CLK_EN);
>   	priv->clk_gate.hw.init = &init;
>   
> -	priv->adc_clk = devm_clk_register(&indio_dev->dev, &priv->clk_gate.hw);
> +	priv->adc_clk = devm_clk_register(idev, &priv->clk_gate.hw);

You are not changing anything here. But we shouldn't be devm'ing on the 
IIO device. It will get freed eventually, but only when the last 
reference to the iio device has been dropped, which might be long after 
the platform device has been removed. devm'ing should happen on the 
platform_device's device. Might be worth fixing.

>   	if (WARN_ON(IS_ERR(priv->adc_clk)))
>   		return PTR_ERR(priv->adc_clk);
>   
> @@ -706,8 +703,7 @@ static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
>   	size_t read_len;
>   	


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Re: [PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for struct device

[Lars-Peter Clausen]

On 6/2/22 13:42, Andy Shevchenko wrote:
return -ENOMEM;
>   
> @@ -690,7 +687,7 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,
>   	priv->clk_gate.bit_idx = __ffs(MESON_SAR_ADC_REG3_CLK_EN);
>   	priv->clk_gate.hw.init = &init;
>   
> -	priv->adc_clk = devm_clk_register(&indio_dev->dev, &priv->clk_gate.hw);
> +	priv->adc_clk = devm_clk_register(idev, &priv->clk_gate.hw);

You are not changing anything here. But we shouldn't be devm'ing on the 
IIO device. It will get freed eventually, but only when the last 
reference to the iio device has been dropped, which might be long after 
the platform device has been removed. devm'ing should happen on the 
platform_device's device. Might be worth fixing.

>   	if (WARN_ON(IS_ERR(priv->adc_clk)))
>   		return PTR_ERR(priv->adc_clk);
>   
> @@ -706,8 +703,7 @@ static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
>   	size_t read_len;
>   	


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Re: [PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for struct device

[Andy Shevchenko]

On Thu, Jun 2, 2022 at 2:08 PM Lars-Peter Clausen <lars@metafoo.de> wrote:
> On 6/2/22 13:42, Andy Shevchenko wrote:

...

> > -     priv->adc_clk = devm_clk_register(&indio_dev->dev, &priv->clk_gate.hw);
> > +     priv->adc_clk = devm_clk_register(idev, &priv->clk_gate.hw);
>
> You are not changing anything here.

The scope of patch is supposed not to change the current behaviour :-)

> But we shouldn't be devm'ing on the
> IIO device. It will get freed eventually, but only when the last
> reference to the iio device has been dropped, which might be long after
> the platform device has been removed. devm'ing should happen on the
> platform_device's device. Might be worth fixing.

Thanks for confirming my suspicions (as I mentioned to Martin, using
an IIO device there feels wrong).
I will add another patch to v3.

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for struct device

[Andy Shevchenko]

On Thu, Jun 2, 2022 at 2:08 PM Lars-Peter Clausen <lars@metafoo.de> wrote:
> On 6/2/22 13:42, Andy Shevchenko wrote:

...

> > -     priv->adc_clk = devm_clk_register(&indio_dev->dev, &priv->clk_gate.hw);
> > +     priv->adc_clk = devm_clk_register(idev, &priv->clk_gate.hw);
>
> You are not changing anything here.

The scope of patch is supposed not to change the current behaviour :-)

> But we shouldn't be devm'ing on the
> IIO device. It will get freed eventually, but only when the last
> reference to the iio device has been dropped, which might be long after
> the platform device has been removed. devm'ing should happen on the
> platform_device's device. Might be worth fixing.

Thanks for confirming my suspicions (as I mentioned to Martin, using
an IIO device there feels wrong).
I will add another patch to v3.

-- 
With Best Regards,
Andy Shevchenko

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Re: [PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for struct device

[Andy Shevchenko]

On Thu, Jun 2, 2022 at 2:08 PM Lars-Peter Clausen <lars@metafoo.de> wrote:
> On 6/2/22 13:42, Andy Shevchenko wrote:

...

> > -     priv->adc_clk = devm_clk_register(&indio_dev->dev, &priv->clk_gate.hw);
> > +     priv->adc_clk = devm_clk_register(idev, &priv->clk_gate.hw);
>
> You are not changing anything here.

The scope of patch is supposed not to change the current behaviour :-)

> But we shouldn't be devm'ing on the
> IIO device. It will get freed eventually, but only when the last
> reference to the iio device has been dropped, which might be long after
> the platform device has been removed. devm'ing should happen on the
> platform_device's device. Might be worth fixing.

Thanks for confirming my suspicions (as I mentioned to Martin, using
an IIO device there feels wrong).
I will add another patch to v3.

-- 
With Best Regards,
Andy Shevchenko

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Re: [PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for struct device

[Jonathan Cameron]

On Thu, 2 Jun 2022 15:45:27 +0200
Andy Shevchenko <andy.shevchenko@gmail.com> wrote:

> On Thu, Jun 2, 2022 at 2:08 PM Lars-Peter Clausen <lars@metafoo.de> wrote:
> > On 6/2/22 13:42, Andy Shevchenko wrote:  
> 
> ...
> 
> > > -     priv->adc_clk = devm_clk_register(&indio_dev->dev, &priv->clk_gate.hw);
> > > +     priv->adc_clk = devm_clk_register(idev, &priv->clk_gate.hw);  
> >
> > You are not changing anything here.  
> 
> The scope of patch is supposed not to change the current behaviour :-)
> 
> > But we shouldn't be devm'ing on the
> > IIO device. It will get freed eventually, but only when the last
> > reference to the iio device has been dropped, which might be long after
> > the platform device has been removed. devm'ing should happen on the
> > platform_device's device. Might be worth fixing.  
> 
> Thanks for confirming my suspicions (as I mentioned to Martin, using
> an IIO device there feels wrong).
> I will add another patch to v3.
> 

I thought that the iio_dev ends up holding a reference to the platform
device dev so the parent would only be released if the child had already been,
but I may well be wrong on that. 

Either way I don't mind it being tidied up.

Jonathan

Re: [PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for struct device

[Jonathan Cameron]

On Thu, 2 Jun 2022 15:45:27 +0200
Andy Shevchenko <andy.shevchenko@gmail.com> wrote:

> On Thu, Jun 2, 2022 at 2:08 PM Lars-Peter Clausen <lars@metafoo.de> wrote:
> > On 6/2/22 13:42, Andy Shevchenko wrote:  
> 
> ...
> 
> > > -     priv->adc_clk = devm_clk_register(&indio_dev->dev, &priv->clk_gate.hw);
> > > +     priv->adc_clk = devm_clk_register(idev, &priv->clk_gate.hw);  
> >
> > You are not changing anything here.  
> 
> The scope of patch is supposed not to change the current behaviour :-)
> 
> > But we shouldn't be devm'ing on the
> > IIO device. It will get freed eventually, but only when the last
> > reference to the iio device has been dropped, which might be long after
> > the platform device has been removed. devm'ing should happen on the
> > platform_device's device. Might be worth fixing.  
> 
> Thanks for confirming my suspicions (as I mentioned to Martin, using
> an IIO device there feels wrong).
> I will add another patch to v3.
> 

I thought that the iio_dev ends up holding a reference to the platform
device dev so the parent would only be released if the child had already been,
but I may well be wrong on that. 

Either way I don't mind it being tidied up.

Jonathan



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Re: [PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for struct device

[Jonathan Cameron]

On Thu, 2 Jun 2022 15:45:27 +0200
Andy Shevchenko <andy.shevchenko@gmail.com> wrote:

> On Thu, Jun 2, 2022 at 2:08 PM Lars-Peter Clausen <lars@metafoo.de> wrote:
> > On 6/2/22 13:42, Andy Shevchenko wrote:  
> 
> ...
> 
> > > -     priv->adc_clk = devm_clk_register(&indio_dev->dev, &priv->clk_gate.hw);
> > > +     priv->adc_clk = devm_clk_register(idev, &priv->clk_gate.hw);  
> >
> > You are not changing anything here.  
> 
> The scope of patch is supposed not to change the current behaviour :-)
> 
> > But we shouldn't be devm'ing on the
> > IIO device. It will get freed eventually, but only when the last
> > reference to the iio device has been dropped, which might be long after
> > the platform device has been removed. devm'ing should happen on the
> > platform_device's device. Might be worth fixing.  
> 
> Thanks for confirming my suspicions (as I mentioned to Martin, using
> an IIO device there feels wrong).
> I will add another patch to v3.
> 

I thought that the iio_dev ends up holding a reference to the platform
device dev so the parent would only be released if the child had already been,
but I may well be wrong on that. 

Either way I don't mind it being tidied up.

Jonathan



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