[PATCH v3 2/6] iio: frequency: admv1014: 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.

Drop 'SPI' from error messages since the bus type is evident from
the device hierarchy.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
 drivers/iio/frequency/admv1014.c | 94 +++++++++++++++-----------------
 1 file changed, 43 insertions(+), 51 deletions(-)

diff --git a/drivers/iio/frequency/admv1014.c b/drivers/iio/frequency/admv1014.c
index 7a8f92ec80a2..eeb01cfb799f 100644
--- a/drivers/iio/frequency/admv1014.c
+++ b/drivers/iio/frequency/admv1014.c
@@ -609,16 +609,15 @@ static void admv1014_powerdown(void *data)
 static int admv1014_init(struct admv1014_state *st)
 {
 	unsigned int chip_id, enable_reg, enable_reg_msk;
-	struct spi_device *spi = st->spi;
+	struct device *dev = &st->spi->dev;
 	int ret;
 
 	ret = regulator_bulk_enable(ADMV1014_NUM_REGULATORS, st->regulators);
-	if (ret) {
-		dev_err(&spi->dev, "Failed to enable regulators");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to enable regulators");
 
-	ret = devm_add_action_or_reset(&spi->dev, admv1014_reg_disable, st->regulators);
+	ret = devm_add_action_or_reset(dev, admv1014_reg_disable, st->regulators);
 	if (ret)
 		return ret;
 
@@ -626,16 +625,16 @@ static int admv1014_init(struct admv1014_state *st)
 	if (ret)
 		return ret;
 
-	ret = devm_add_action_or_reset(&spi->dev, admv1014_clk_disable, st->clkin);
+	ret = devm_add_action_or_reset(dev, admv1014_clk_disable, st->clkin);
 	if (ret)
 		return ret;
 
 	st->nb.notifier_call = admv1014_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;
 
-	ret = devm_add_action_or_reset(&spi->dev, admv1014_powerdown, st);
+	ret = devm_add_action_or_reset(dev, admv1014_powerdown, st);
 	if (ret)
 		return ret;
 
@@ -643,55 +642,48 @@ static int admv1014_init(struct admv1014_state *st)
 	ret = __admv1014_spi_update_bits(st, ADMV1014_REG_SPI_CONTROL,
 					 ADMV1014_SPI_SOFT_RESET_MSK,
 					 FIELD_PREP(ADMV1014_SPI_SOFT_RESET_MSK, 1));
-	if (ret) {
-		dev_err(&spi->dev, "ADMV1014 SPI software reset failed.\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "ADMV1014 software reset failed.\n");
 
 	ret = __admv1014_spi_update_bits(st, ADMV1014_REG_SPI_CONTROL,
 					 ADMV1014_SPI_SOFT_RESET_MSK,
 					 FIELD_PREP(ADMV1014_SPI_SOFT_RESET_MSK, 0));
-	if (ret) {
-		dev_err(&spi->dev, "ADMV1014 SPI software reset disable failed.\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "ADMV1014 software reset disable failed.\n");
 
 	ret = __admv1014_spi_write(st, ADMV1014_REG_VVA_TEMP_COMP, 0x727C);
-	if (ret) {
-		dev_err(&spi->dev, "Writing default Temperature Compensation value failed.\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Writing default Temperature Compensation value failed.\n");
 
 	ret = __admv1014_spi_read(st, ADMV1014_REG_SPI_CONTROL, &chip_id);
 	if (ret)
 		return ret;
 
 	chip_id = FIELD_GET(ADMV1014_CHIP_ID_MSK, chip_id);
-	if (chip_id != ADMV1014_CHIP_ID) {
-		dev_err(&spi->dev, "Invalid Chip ID.\n");
-		return -EINVAL;
-	}
+	if (chip_id != ADMV1014_CHIP_ID)
+		return dev_err_probe(dev, -EINVAL,
+				     "Invalid Chip ID.\n");
 
 	ret = __admv1014_spi_update_bits(st, ADMV1014_REG_QUAD,
 					 ADMV1014_QUAD_SE_MODE_MSK,
 					 FIELD_PREP(ADMV1014_QUAD_SE_MODE_MSK,
 						    st->quad_se_mode));
-	if (ret) {
-		dev_err(&spi->dev, "Writing Quad SE Mode failed.\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Writing Quad SE Mode failed.\n");
 
 	ret = admv1014_update_quad_filters(st);
-	if (ret) {
-		dev_err(&spi->dev, "Update Quad Filters failed.\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Update Quad Filters failed.\n");
 
 	ret = admv1014_update_vcm_settings(st);
-	if (ret) {
-		dev_err(&spi->dev, "Update VCM Settings failed.\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Update VCM Settings failed.\n");
 
 	enable_reg_msk = ADMV1014_P1DB_COMPENSATION_MSK |
 			 ADMV1014_IF_AMP_PD_MSK |
@@ -711,14 +703,14 @@ static int admv1014_init(struct admv1014_state *st)
 static int admv1014_properties_parse(struct admv1014_state *st)
 {
 	unsigned int i;
-	struct spi_device *spi = st->spi;
+	struct device *dev = &st->spi->dev;
 	int ret;
 
-	st->det_en = device_property_read_bool(&spi->dev, "adi,detector-enable");
+	st->det_en = device_property_read_bool(dev, "adi,detector-enable");
 
-	st->p1db_comp = device_property_read_bool(&spi->dev, "adi,p1db-compensation-enable");
+	st->p1db_comp = device_property_read_bool(dev, "adi,p1db-compensation-enable");
 
-	ret = device_property_match_property_string(&spi->dev, "adi,input-mode",
+	ret = device_property_match_property_string(dev, "adi,input-mode",
 						    input_mode_names,
 						    ARRAY_SIZE(input_mode_names));
 	if (ret >= 0)
@@ -726,7 +718,7 @@ static int admv1014_properties_parse(struct admv1014_state *st)
 	else
 		st->input_mode = ADMV1014_IQ_MODE;
 
-	ret = device_property_match_property_string(&spi->dev, "adi,quad-se-mode",
+	ret = device_property_match_property_string(dev, "adi,quad-se-mode",
 						    quad_se_mode_names,
 						    ARRAY_SIZE(quad_se_mode_names));
 	if (ret >= 0)
@@ -737,16 +729,15 @@ static int admv1014_properties_parse(struct admv1014_state *st)
 	for (i = 0; i < ADMV1014_NUM_REGULATORS; ++i)
 		st->regulators[i].supply = admv1014_reg_name[i];
 
-	ret = devm_regulator_bulk_get(&st->spi->dev, ADMV1014_NUM_REGULATORS,
+	ret = devm_regulator_bulk_get(dev, ADMV1014_NUM_REGULATORS,
 				      st->regulators);
-	if (ret) {
-		dev_err(&spi->dev, "Failed to request regulators");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to request regulators");
 
-	st->clkin = devm_clk_get(&spi->dev, "lo_in");
+	st->clkin = devm_clk_get(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");
 
 	return 0;
@@ -756,9 +747,10 @@ static int admv1014_probe(struct spi_device *spi)
 {
 	struct iio_dev *indio_dev;
 	struct admv1014_state *st;
+	struct device *dev = &spi->dev;
 	int ret;
 
-	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
 	if (!indio_dev)
 		return -ENOMEM;
 
@@ -787,7 +779,7 @@ static int admv1014_probe(struct spi_device *spi)
 	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 admv1014_id[] = {
-- 
2.43.0