linux-kernel - [PATCH 1/2] staging: iio: cdc: ad7746: clean up driver comments and probe return

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Date:   Tue, 11 May 2021 17:54:01 -0300
From:   Lucas Stankus <lucas.p.stankus@...il.com>
To:     lars@...afoo.de, Michael.Hennerich@...log.com, jic23@...nel.org,
        gregkh@...uxfoundation.org
Cc:     linux-iio@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] staging: iio: cdc: ad7746: clean up driver comments and
 probe return

Remove vague comments, align temperature comment with indent block and
simplify probe return on device register.

Also fix the following checkpatch warning:
CHECK: Alignment should match open parenthesis

Signed-off-by: Lucas Stankus <lucas.p.stankus@...il.com>
---
 drivers/staging/iio/cdc/ad7746.c | 31 ++++++++++---------------------
 1 file changed, 10 insertions(+), 21 deletions(-)

diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c
index dfd71e99e872..e03d010b2f4c 100644
--- a/drivers/staging/iio/cdc/ad7746.c
+++ b/drivers/staging/iio/cdc/ad7746.c
@@ -84,10 +84,6 @@
 #define AD7746_CAPDAC_DACEN		BIT(7)
 #define AD7746_CAPDAC_DACP(x)		((x) & 0x7F)
 
-/*
- * struct ad7746_chip_info - chip specific information
- */
-
 struct ad7746_chip_info {
 	struct i2c_client *client;
 	struct mutex lock; /* protect sensor state */
@@ -232,13 +228,14 @@ static int ad7746_select_channel(struct iio_dev *indio_dev,
 
 		if (chip->capdac_set != chan->channel) {
 			ret = i2c_smbus_write_byte_data(chip->client,
-				AD7746_REG_CAPDACA,
-				chip->capdac[chan->channel][0]);
+							AD7746_REG_CAPDACA,
+							chip->capdac[chan->channel][0]);
 			if (ret < 0)
 				return ret;
+
 			ret = i2c_smbus_write_byte_data(chip->client,
-				AD7746_REG_CAPDACB,
-				chip->capdac[chan->channel][1]);
+							AD7746_REG_CAPDACB,
+							chip->capdac[chan->channel][1]);
 			if (ret < 0)
 				return ret;
 
@@ -564,10 +561,10 @@ static int ad7746_read_raw(struct iio_dev *indio_dev,
 
 		switch (chan->type) {
 		case IIO_TEMP:
-		/*
-		 * temperature in milli degrees Celsius
-		 * T = ((*val / 2048) - 4096) * 1000
-		 */
+			/*
+			 * temperature in milli degrees Celsius
+			 * T = ((*val / 2048) - 4096) * 1000
+			 */
 			*val = (*val * 125) / 256;
 			break;
 		case IIO_VOLTAGE:
@@ -669,10 +666,6 @@ static const struct iio_info ad7746_info = {
 	.write_raw = ad7746_write_raw,
 };
 
-/*
- * device probe and remove
- */
-
 static int ad7746_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
@@ -730,11 +723,7 @@ static int ad7746_probe(struct i2c_client *client,
 	if (ret < 0)
 		return ret;
 
-	ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev);
-	if (ret)
-		return ret;
-
-	return 0;
+	return devm_iio_device_register(indio_dev->dev.parent, indio_dev);
 }
 
 static const struct i2c_device_id ad7746_id[] = {
-- 
2.31.1