[PATCH v3 3/6] iio: frequency: admv1013: add dev variable and use dev_err_probe

[Antoniu Miclaus <antoniu.miclaus@analog.com>]

Introduce a struct device *dev local variable and replace dev_err() +
return with dev_err_probe() in functions that use devm_ managed
resources. This simplifies error handling and ensures proper logging
of deferred probes.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
 drivers/iio/frequency/admv1013.c | 51 +++++++++++++++-----------------
 1 file changed, 24 insertions(+), 27 deletions(-)

diff --git a/drivers/iio/frequency/admv1013.c b/drivers/iio/frequency/admv1013.c
index d8e8d541990f..514cf9f8eacb 100644
--- a/drivers/iio/frequency/admv1013.c
+++ b/drivers/iio/frequency/admv1013.c
@@ -441,7 +441,7 @@ static int admv1013_init(struct admv1013_state *st, int vcm_uv)
 {
 	int ret;
 	unsigned int data;
-	struct spi_device *spi = st->spi;
+	struct device *dev = &st->spi->dev;
 
 	/* Perform a software reset */
 	ret = __admv1013_spi_update_bits(st, ADMV1013_REG_SPI_CONTROL,
@@ -461,10 +461,9 @@ static int admv1013_init(struct admv1013_state *st, int vcm_uv)
 		return ret;
 
 	data = FIELD_GET(ADMV1013_CHIP_ID_MSK, data);
-	if (data != ADMV1013_CHIP_ID) {
-		dev_err(&spi->dev, "Invalid Chip ID.\n");
-		return -EINVAL;
-	}
+	if (data != ADMV1013_CHIP_ID)
+		return dev_err_probe(dev, -EINVAL,
+				     "Invalid Chip ID.\n");
 
 	ret = __admv1013_spi_write(st, ADMV1013_REG_VVA_TEMP_COMP, 0xE700);
 	if (ret)
@@ -518,11 +517,11 @@ static int admv1013_properties_parse(struct admv1013_state *st)
 {
 	int ret;
 	const char *str;
-	struct spi_device *spi = st->spi;
+	struct device *dev = &st->spi->dev;
 
-	st->det_en = device_property_read_bool(&spi->dev, "adi,detector-enable");
+	st->det_en = device_property_read_bool(dev, "adi,detector-enable");
 
-	ret = device_property_read_string(&spi->dev, "adi,input-mode", &str);
+	ret = device_property_read_string(dev, "adi,input-mode", &str);
 	if (ret)
 		st->input_mode = ADMV1013_IQ_MODE;
 
@@ -533,7 +532,7 @@ static int admv1013_properties_parse(struct admv1013_state *st)
 	else
 		return -EINVAL;
 
-	ret = device_property_read_string(&spi->dev, "adi,quad-se-mode", &str);
+	ret = device_property_read_string(dev, "adi,quad-se-mode", &str);
 	if (ret)
 		st->quad_se_mode = ADMV1013_SE_MODE_DIFF;
 
@@ -546,14 +545,12 @@ static int admv1013_properties_parse(struct admv1013_state *st)
 	else
 		return -EINVAL;
 
-	ret = devm_regulator_bulk_get_enable(&st->spi->dev,
+	ret = devm_regulator_bulk_get_enable(dev,
 					     ARRAY_SIZE(admv1013_vcc_regs),
 					     admv1013_vcc_regs);
-	if (ret) {
-		dev_err_probe(&spi->dev, ret,
-			      "Failed to request VCC regulators\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to request VCC regulators\n");
 
 	return 0;
 }
@@ -562,9 +559,10 @@ static int admv1013_probe(struct spi_device *spi)
 {
 	struct iio_dev *indio_dev;
 	struct admv1013_state *st;
+	struct device *dev = &spi->dev;
 	int ret, vcm_uv;
 
-	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
 	if (!indio_dev)
 		return -ENOMEM;
 
@@ -581,36 +579,35 @@ static int admv1013_probe(struct spi_device *spi)
 	if (ret)
 		return ret;
 
-	ret = devm_regulator_get_enable_read_voltage(&spi->dev, "vcm");
+	ret = devm_regulator_get_enable_read_voltage(dev, "vcm");
 	if (ret < 0)
-		return dev_err_probe(&spi->dev, ret,
+		return dev_err_probe(dev, ret,
 				     "failed to get the common-mode voltage\n");
 
 	vcm_uv = ret;
 
-	st->clkin = devm_clk_get_enabled(&spi->dev, "lo_in");
+	st->clkin = devm_clk_get_enabled(dev, "lo_in");
 	if (IS_ERR(st->clkin))
-		return dev_err_probe(&spi->dev, PTR_ERR(st->clkin),
+		return dev_err_probe(dev, PTR_ERR(st->clkin),
 				     "failed to get the LO input clock\n");
 
 	st->nb.notifier_call = admv1013_freq_change;
-	ret = devm_clk_notifier_register(&spi->dev, st->clkin, &st->nb);
+	ret = devm_clk_notifier_register(dev, st->clkin, &st->nb);
 	if (ret)
 		return ret;
 
 	mutex_init(&st->lock);
 
 	ret = admv1013_init(st, vcm_uv);
-	if (ret) {
-		dev_err(&spi->dev, "admv1013 init failed\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "admv1013 init failed\n");
 
-	ret = devm_add_action_or_reset(&spi->dev, admv1013_powerdown, st);
+	ret = devm_add_action_or_reset(dev, admv1013_powerdown, st);
 	if (ret)
 		return ret;
 
-	return devm_iio_device_register(&spi->dev, indio_dev);
+	return devm_iio_device_register(dev, indio_dev);
 }
 
 static const struct spi_device_id admv1013_id[] = {
-- 
2.43.0