1 files changed, 13 insertions, 35 deletions

diff --git a/drivers/iio/adc/ti-ads7950.c b/drivers/iio/adc/ti-ads7950.c
index c31c706c92a9..0b98c8e7385d 100644
--- a/drivers/iio/adc/ti-ads7950.c
+++ b/drivers/iio/adc/ti-ads7950.c
@@ -334,19 +334,9 @@ static int ti_ads7950_scan_direct(struct iio_dev *indio_dev, unsigned int ch)
 	return st->single_rx;
 }
 
-static int ti_ads7950_get_range(struct ti_ads7950_state *st)
+static unsigned int ti_ads7950_get_range(struct ti_ads7950_state *st)
 {
-	int vref;
-
-	if (st->vref_mv) {
-		vref = st->vref_mv;
-	} else {
-		vref = regulator_get_voltage(st->reg);
-		if (vref < 0)
-			return vref;
-
-		vref /= 1000;
-	}
+	unsigned int vref = st->vref_mv;
 
 	if (st->cmd_settings_bitmask & TI_ADS7950_CR_RANGE_5V)
 		vref *= 2;
@@ -375,11 +365,7 @@ static int ti_ads7950_read_raw(struct iio_dev *indio_dev,
 
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
-		ret = ti_ads7950_get_range(st);
-		if (ret < 0)
-			return ret;
-
-		*val = ret;
+		*val = ti_ads7950_get_range(st);
 		*val2 = (1 << chan->scan_type.realbits) - 1;
 
 		return IIO_VAL_FRACTIONAL;
@@ -573,30 +559,25 @@ static int ti_ads7950_probe(struct spi_device *spi)
 	spi_message_init_with_transfers(&st->scan_single_msg,
 					st->scan_single_xfer, 3);
 
-	/* Use hard coded value for reference voltage in ACPI case */
-	if (ACPI_COMPANION(&spi->dev))
-		st->vref_mv = TI_ADS7950_VA_MV_ACPI_DEFAULT;
-
 	mutex_init(&st->slock);
 
-	st->reg = devm_regulator_get(&spi->dev, "vref");
-	if (IS_ERR(st->reg)) {
-		ret = dev_err_probe(&spi->dev, PTR_ERR(st->reg),
-				     "Failed to get regulator \"vref\"\n");
-		goto error_destroy_mutex;
-	}
+	/* Use hard coded value for reference voltage in ACPI case */
+	if (ACPI_COMPANION(&spi->dev)) {
+		st->vref_mv = TI_ADS7950_VA_MV_ACPI_DEFAULT;
+	} else {
+		ret = devm_regulator_get_enable_read_voltage(&spi->dev, "vref");
+		if (ret < 0)
+			return dev_err_probe(&spi->dev, ret,
+					     "Failed to get regulator \"vref\"\n");
 
-	ret = regulator_enable(st->reg);
-	if (ret) {
-		dev_err(&spi->dev, "Failed to enable regulator \"vref\"\n");
-		goto error_destroy_mutex;
+		st->vref_mv = ret / 1000;
 	}
 
 	ret = iio_triggered_buffer_setup(indio_dev, NULL,
 					 &ti_ads7950_trigger_handler, NULL);
 	if (ret) {
 		dev_err(&spi->dev, "Failed to setup triggered buffer\n");
-		goto error_disable_reg;
+		goto error_destroy_mutex;
 	}
 
 	ret = ti_ads7950_init_hw(st);
@@ -636,8 +617,6 @@ error_iio_device:
 	iio_device_unregister(indio_dev);
 error_cleanup_ring:
 	iio_triggered_buffer_cleanup(indio_dev);
-error_disable_reg:
-	regulator_disable(st->reg);
 error_destroy_mutex:
 	mutex_destroy(&st->slock);
 
@@ -652,7 +631,6 @@ static void ti_ads7950_remove(struct spi_device *spi)
 	gpiochip_remove(&st->chip);
 	iio_device_unregister(indio_dev);
 	iio_triggered_buffer_cleanup(indio_dev);
-	regulator_disable(st->reg);
 	mutex_destroy(&st->slock);
 }