[PATCH 2/3] staging: iio: adc: ad7280a: split ad7280_attr_init() to more functions

[Slawomir Stepien <sst@xxxxxxxxx>]

The ad7280_attr_init function has been split into more specific
functions to increase the code readability.

Signed-off-by: Slawomir Stepien <sst@xxxxxxxxx>
---
 drivers/staging/iio/adc/ad7280a.c | 79 +++++++++++++++++++------------
 1 file changed, 48 insertions(+), 31 deletions(-)

diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c
index a6b1bdd9f372..6faa85bf6f7e 100644
--- a/drivers/staging/iio/adc/ad7280a.c
+++ b/drivers/staging/iio/adc/ad7280a.c
@@ -592,11 +592,49 @@ static int ad7280_channel_init(struct ad7280_state *st)
 	return cnt + 1;
 }
 
+static int ad7280_balance_switch_attr_init(struct ad7280_state *st, int cnt,
+					   int dev, int ch)
+{
+	struct iio_dev_attr *attr = &st->iio_attr[cnt];
+
+	attr->address = ad7280a_devaddr(dev) << 8 | ch;
+	attr->dev_attr.attr.mode = 0644;
+	attr->dev_attr.show = ad7280_show_balance_sw;
+	attr->dev_attr.store = ad7280_store_balance_sw;
+	attr->dev_attr.attr.name = devm_kasprintf(&st->spi->dev, GFP_KERNEL,
+						  "in%d-in%d_balance_switch_en",
+						  ch, ch + 1);
+	if (!attr->dev_attr.attr.name)
+		return -ENOMEM;
+
+	ad7280_attributes[cnt] = &attr->dev_attr.attr;
+
+	return 0;
+}
+
+static int ad7280_balance_timer_attr_init(struct ad7280_state *st, int cnt,
+					  int dev, int ch)
+{
+	struct iio_dev_attr *attr = &st->iio_attr[cnt];
+
+	attr->address = ad7280a_devaddr(dev) << 8 | (AD7280A_CB1_TIMER + ch);
+	attr->dev_attr.attr.mode = 0644;
+	attr->dev_attr.show = ad7280_show_balance_timer;
+	attr->dev_attr.store = ad7280_store_balance_timer;
+	attr->dev_attr.attr.name = devm_kasprintf(&st->spi->dev, GFP_KERNEL,
+						  "in%d-in%d_balance_timer",
+						  ch, ch + 1);
+	if (!attr->dev_attr.attr.name)
+		return -ENOMEM;
+
+	ad7280_attributes[cnt] = &attr->dev_attr.attr;
+
+	return 0;
+}
+
 static int ad7280_attr_init(struct ad7280_state *st)
 {
-	int dev, ch, cnt;
-	unsigned int index;
-	struct iio_dev_attr *iio_attr;
+	int dev, ch, cnt, ret;
 
 	st->iio_attr = devm_kcalloc(&st->spi->dev, 2, sizeof(*st->iio_attr) *
 				    (st->slave_num + 1) * AD7280A_CELLS_PER_DEV,
@@ -607,35 +645,14 @@ static int ad7280_attr_init(struct ad7280_state *st)
 	for (dev = 0, cnt = 0; dev <= st->slave_num; dev++)
 		for (ch = AD7280A_CELL_VOLTAGE_1; ch <= AD7280A_CELL_VOLTAGE_6;
 			ch++, cnt++) {
-			iio_attr = &st->iio_attr[cnt];
-			index = dev * AD7280A_CELLS_PER_DEV + ch;
-			iio_attr->address = ad7280a_devaddr(dev) << 8 | ch;
-			iio_attr->dev_attr.attr.mode = 0644;
-			iio_attr->dev_attr.show = ad7280_show_balance_sw;
-			iio_attr->dev_attr.store = ad7280_store_balance_sw;
-			iio_attr->dev_attr.attr.name =
-				devm_kasprintf(&st->spi->dev, GFP_KERNEL,
-					       "in%d-in%d_balance_switch_en",
-					       index, index + 1);
-			if (!iio_attr->dev_attr.attr.name)
-				return -ENOMEM;
-
-			ad7280_attributes[cnt] = &iio_attr->dev_attr.attr;
+			ret = ad7280_balance_switch_attr_init(st, cnt, dev, ch);
+			if (ret < 0)
+				return ret;
+
 			cnt++;
-			iio_attr = &st->iio_attr[cnt];
-			iio_attr->address = ad7280a_devaddr(dev) << 8 |
-				(AD7280A_CB1_TIMER + ch);
-			iio_attr->dev_attr.attr.mode = 0644;
-			iio_attr->dev_attr.show = ad7280_show_balance_timer;
-			iio_attr->dev_attr.store = ad7280_store_balance_timer;
-			iio_attr->dev_attr.attr.name =
-				devm_kasprintf(&st->spi->dev, GFP_KERNEL,
-					       "in%d-in%d_balance_timer",
-					       index, index + 1);
-			if (!iio_attr->dev_attr.attr.name)
-				return -ENOMEM;
-
-			ad7280_attributes[cnt] = &iio_attr->dev_attr.attr;
+			ret = ad7280_balance_timer_attr_init(st, cnt, dev, ch);
+			if (ret < 0)
+				return ret;
 		}
 
 	ad7280_attributes[cnt] = NULL;
-- 
2.19.2