[PATCH v3 4/6] iio: frequency: adf4377: 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/adf4377.c | 57 ++++++++++++++++-----------------
 1 file changed, 27 insertions(+), 30 deletions(-)

diff --git a/drivers/iio/frequency/adf4377.c b/drivers/iio/frequency/adf4377.c
index fa686f785fa4..cfc0c524c4a4 100644
--- a/drivers/iio/frequency/adf4377.c
+++ b/drivers/iio/frequency/adf4377.c
@@ -706,23 +706,21 @@ static void adf4377_gpio_init(struct adf4377_state *st)
 
 static int adf4377_init(struct adf4377_state *st)
 {
-	struct spi_device *spi = st->spi;
+	struct device *dev = &st->spi->dev;
 	int ret;
 
 	adf4377_gpio_init(st);
 
 	ret = adf4377_soft_reset(st);
-	if (ret) {
-		dev_err(&spi->dev, "Failed to soft reset.\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to soft reset.\n");
 
 	ret = regmap_multi_reg_write(st->regmap, adf4377_reg_defaults,
 				     ARRAY_SIZE(adf4377_reg_defaults));
-	if (ret) {
-		dev_err(&spi->dev, "Failed to set default registers.\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to set default registers.\n");
 
 	ret = regmap_update_bits(st->regmap, 0x00,
 				 ADF4377_0000_SDO_ACTIVE_MSK | ADF4377_0000_SDO_ACTIVE_R_MSK,
@@ -730,10 +728,9 @@ static int adf4377_init(struct adf4377_state *st)
 					    ADF4377_0000_SDO_ACTIVE_SPI_4W) |
 				 FIELD_PREP(ADF4377_0000_SDO_ACTIVE_R_MSK,
 					    ADF4377_0000_SDO_ACTIVE_SPI_4W));
-	if (ret) {
-		dev_err(&spi->dev, "Failed to set 4-Wire Operation.\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to set 4-Wire Operation.\n");
 
 	st->clkin_freq = clk_get_rate(st->clkin);
 
@@ -747,10 +744,9 @@ static int adf4377_init(struct adf4377_state *st)
 			   FIELD_PREP(ADF4377_001A_PD_PFDCP_MSK, 0) |
 			   FIELD_PREP(ADF4377_001A_PD_CLKOUT1_MSK, 0) |
 			   FIELD_PREP(ADF4377_001A_PD_CLKOUT2_MSK, 0));
-	if (ret) {
-		dev_err(&spi->dev, "Failed to set power down registers.\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to set power down registers.\n");
 
 	/* Set Mux Output */
 	ret = regmap_update_bits(st->regmap, 0x1D,
@@ -882,35 +878,35 @@ static const struct iio_chan_spec adf4377_channels[] = {
 
 static int adf4377_properties_parse(struct adf4377_state *st)
 {
-	struct spi_device *spi = st->spi;
+	struct device *dev = &st->spi->dev;
 	int ret;
 
-	st->clkin = devm_clk_get_enabled(&spi->dev, "ref_in");
+	st->clkin = devm_clk_get_enabled(dev, "ref_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 reference input clock\n");
 
-	st->gpio_ce = devm_gpiod_get_optional(&st->spi->dev, "chip-enable",
+	st->gpio_ce = devm_gpiod_get_optional(dev, "chip-enable",
 					      GPIOD_OUT_LOW);
 	if (IS_ERR(st->gpio_ce))
-		return dev_err_probe(&spi->dev, PTR_ERR(st->gpio_ce),
+		return dev_err_probe(dev, PTR_ERR(st->gpio_ce),
 				     "failed to get the CE GPIO\n");
 
-	st->gpio_enclk1 = devm_gpiod_get_optional(&st->spi->dev, "clk1-enable",
+	st->gpio_enclk1 = devm_gpiod_get_optional(dev, "clk1-enable",
 						  GPIOD_OUT_LOW);
 	if (IS_ERR(st->gpio_enclk1))
-		return dev_err_probe(&spi->dev, PTR_ERR(st->gpio_enclk1),
+		return dev_err_probe(dev, PTR_ERR(st->gpio_enclk1),
 				     "failed to get the CE GPIO\n");
 
 	if (st->chip_info->has_gpio_enclk2) {
-		st->gpio_enclk2 = devm_gpiod_get_optional(&st->spi->dev, "clk2-enable",
+		st->gpio_enclk2 = devm_gpiod_get_optional(dev, "clk2-enable",
 							  GPIOD_OUT_LOW);
 		if (IS_ERR(st->gpio_enclk2))
-			return dev_err_probe(&spi->dev, PTR_ERR(st->gpio_enclk2),
+			return dev_err_probe(dev, PTR_ERR(st->gpio_enclk2),
 					"failed to get the CE GPIO\n");
 	}
 
-	ret = device_property_match_property_string(&spi->dev, "adi,muxout-select",
+	ret = device_property_match_property_string(dev, "adi,muxout-select",
 						    adf4377_muxout_modes,
 						    ARRAY_SIZE(adf4377_muxout_modes));
 	if (ret >= 0)
@@ -1055,9 +1051,10 @@ static int adf4377_probe(struct spi_device *spi)
 	struct iio_dev *indio_dev;
 	struct regmap *regmap;
 	struct adf4377_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;
 
@@ -1080,7 +1077,7 @@ static int adf4377_probe(struct spi_device *spi)
 		return ret;
 
 	st->nb.notifier_call = adf4377_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;
 
@@ -1097,7 +1094,7 @@ static int adf4377_probe(struct spi_device *spi)
 		indio_dev->num_channels = ARRAY_SIZE(adf4377_channels);
 	}
 
-	return devm_iio_device_register(&spi->dev, indio_dev);
+	return devm_iio_device_register(dev, indio_dev);
 }
 
 static const struct spi_device_id adf4377_id[] = {
-- 
2.43.0