[PATCH v5 08/15] iio: sx9310: Use regmap_read_poll_timeout() for compensation

[Daniel Campello <campello@xxxxxxxxxxxx>]

Simplify compensation stage by using regmap_read_poll_timeout().

Signed-off-by: Daniel Campello <campello@xxxxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
---

Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2:
 - Fixed dev_err() message

 drivers/iio/proximity/sx9310.c | 25 ++++++++++---------------
 1 file changed, 10 insertions(+), 15 deletions(-)

diff --git a/drivers/iio/proximity/sx9310.c b/drivers/iio/proximity/sx9310.c
index f78500b8a5841e..cd7de40a55c2f6 100644
--- a/drivers/iio/proximity/sx9310.c
+++ b/drivers/iio/proximity/sx9310.c
@@ -799,7 +799,7 @@ static const struct sx9310_reg_default sx9310_default_regs[] = {
 static int sx9310_init_compensation(struct iio_dev *indio_dev)
 {
 	struct sx9310_data *data = iio_priv(indio_dev);
-	int i, ret;
+	int ret;
 	unsigned int val;
 	unsigned int ctrl0;
 
@@ -813,22 +813,17 @@ static int sx9310_init_compensation(struct iio_dev *indio_dev)
 	if (ret < 0)
 		return ret;
 
-	for (i = 100; i >= 0; i--) {
-		msleep(20);
-		ret = regmap_read(data->regmap, SX9310_REG_STAT1, &val);
-		if (ret < 0)
-			goto out;
-		if (!(val & SX9310_REG_STAT1_COMPSTAT_MASK))
-			break;
-	}
-
-	if (i < 0) {
-		dev_err(&data->client->dev,
-			"initial compensation timed out: 0x%02x", val);
-		ret = -ETIMEDOUT;
+	ret = regmap_read_poll_timeout(data->regmap, SX9310_REG_STAT1, val,
+				       !(val & SX9310_REG_STAT1_COMPSTAT_MASK),
+				       20000, 2000000);
+	if (ret) {
+		if (ret == -ETIMEDOUT)
+			dev_err(&data->client->dev,
+				"initial compensation timed out: 0x%02x\n",
+				val);
+		return ret;
 	}
 
-out:
 	regmap_write(data->regmap, SX9310_REG_PROX_CTRL0, ctrl0);
 	return ret;
 }
-- 
2.28.0.163.g6104cc2f0b6-goog