linux-kernel - [PATCH v7 6/8] iio: accel: adxl345: Reorder probe initialization

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Date: Mon,  1 Apr 2024 19:49:04 +0000
From: Lothar Rubusch <l.rubusch@...il.com>
To: lars@...afoo.de,
	Michael.Hennerich@...log.com,
	jic23@...nel.org,
	robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org
Cc: linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	eraretuya@...il.com,
	l.rubusch@...il.com
Subject: [PATCH v7 6/8] iio: accel: adxl345: Reorder probe initialization

Bring indio_dev, setup() and data initialization to begin of the probe()
function to increase readability. Access members through data
pointer to assure implicitely the driver's data instance is correctly
initialized and functional.

Signed-off-by: Lothar Rubusch <l.rubusch@...il.com>
---
 drivers/iio/accel/adxl345_core.c | 40 ++++++++++++++++----------------
 1 file changed, 20 insertions(+), 20 deletions(-)

diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c
index 8d4a66d8c..5d0f3243e 100644
--- a/drivers/iio/accel/adxl345_core.c
+++ b/drivers/iio/accel/adxl345_core.c
@@ -180,14 +180,30 @@ int adxl345_core_probe(struct device *dev, struct regmap *regmap,
 					 ADXL345_DATA_FORMAT_SELF_TEST);
 	int ret;
 
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	data->regmap = regmap;
+	data->info = device_get_match_data(dev);
+	if (!data->info)
+		return -ENODEV;
+
+	indio_dev->name = data->info->name;
+	indio_dev->info = &adxl345_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = adxl345_channels;
+	indio_dev->num_channels = ARRAY_SIZE(adxl345_channels);
+
 	if (setup) {
 		/* Perform optional initial bus specific configuration */
-		ret = setup(dev, regmap);
+		ret = setup(dev, data->regmap);
 		if (ret)
 			return ret;
 
 		/* Enable full-resolution mode */
-		ret = regmap_update_bits(regmap, ADXL345_REG_DATA_FORMAT,
+		ret = regmap_update_bits(data->regmap, ADXL345_REG_DATA_FORMAT,
 					 data_format_mask,
 					 ADXL345_DATA_FORMAT_FULL_RES);
 		if (ret)
@@ -196,14 +212,14 @@ int adxl345_core_probe(struct device *dev, struct regmap *regmap,
 
 	} else {
 		/* Enable full-resolution mode (init all data_format bits) */
-		ret = regmap_write(regmap, ADXL345_REG_DATA_FORMAT,
+		ret = regmap_write(data->regmap, ADXL345_REG_DATA_FORMAT,
 				   ADXL345_DATA_FORMAT_FULL_RES);
 		if (ret)
 			return dev_err_probe(dev, ret,
 					     "Failed to set data range\n");
 	}
 
-	ret = regmap_read(regmap, ADXL345_REG_DEVID, &regval);
+	ret = regmap_read(data->regmap, ADXL345_REG_DEVID, &regval);
 	if (ret < 0)
 		return dev_err_probe(dev, ret, "Error reading device ID\n");
 
@@ -211,22 +227,6 @@ int adxl345_core_probe(struct device *dev, struct regmap *regmap,
 		return dev_err_probe(dev, -ENODEV, "Invalid device ID: %x, expected %x\n",
 				     regval, ADXL345_DEVID);
 
-	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
-	if (!indio_dev)
-		return -ENOMEM;
-
-	data = iio_priv(indio_dev);
-	data->regmap = regmap;
-	data->info = device_get_match_data(dev);
-	if (!data->info)
-		return -ENODEV;
-
-	indio_dev->name = data->info->name;
-	indio_dev->info = &adxl345_info;
-	indio_dev->modes = INDIO_DIRECT_MODE;
-	indio_dev->channels = adxl345_channels;
-	indio_dev->num_channels = ARRAY_SIZE(adxl345_channels);
-
 	/* Enable measurement mode */
 	ret = adxl345_powerup(data->regmap);
 	if (ret < 0)
-- 
2.25.1