diff --git a/drivers/iio/adc/sd_adc_modulator.c b/drivers/iio/adc/sd_adc_modulator.c
index 61246a52dc79..749c46da9c72 100644
--- a/drivers/iio/adc/sd_adc_modulator.c
+++ b/drivers/iio/adc/sd_adc_modulator.c
@@ -12,15 +12,23 @@
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
 #include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
 
 struct iio_sd_mod_priv {
+	struct regulator *vref;
+	int vref_mv;
 };
 
 static int sd_mod_enable(struct iio_backend *backend)
 {
 	struct iio_sd_mod_priv *priv = backend->priv;
+	int ret;
 
 	/* PM resume */
+	ret = regulator_enable(priv->vref);
+
+	ret = regulator_get_voltage(priv->vref);
+	priv->vref_mv = ret / 1000;
 
 	return 0;
 };
@@ -30,6 +38,7 @@ static int sd_mod_disable(struct iio_backend *backend)
 	struct iio_sd_mod_priv *priv = backend->priv;
 
 	/* PM suspend */
+	regulator_disable(priv->vref);
 
 	return 0;
 };
@@ -39,7 +48,15 @@ static int sd_mod_read(struct iio_backend *backend, int *val, int *val2, long ma
 	struct iio_sd_mod_priv *priv = backend->priv;
 
 	switch (mask) {
-		/* Process channel info */
+	case IIO_CHAN_INFO_SCALE:
+		*val = priv->vref_mv;
+		*val2 = 0;
+		return IIO_VAL_INT;
+
+	case IIO_CHAN_INFO_OFFSET:
+		*val = 0;
+		*val2 = 0;
+		return IIO_VAL_INT;
 	}
 
 	return -EINVAL;
@@ -54,12 +71,24 @@ static const struct iio_backend_ops sd_mod_ops = {
 static int iio_sd_mod_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	struct regulator *vref;
 	struct iio_backend *backend;
 	struct iio_sd_mod_priv *priv;
 	int ret;
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 
+	vref = devm_regulator_get_optional(dev, "vref");
+	if (IS_ERR(vref)) {
+		ret = PTR_ERR(vref);
+		if (ret != -ENODEV) {
+			if (ret != -EPROBE_DEFER)
+				dev_err(dev, "vref get failed, %d\n", ret);
+			return ret;
+		}
+	}
+	priv->vref = vref;
+
 	backend = iio_backend_alloc(dev);
 
 	backend->priv = priv;
diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c
index 2e76497cee51..468d72ab079d 100644
--- a/drivers/iio/adc/stm32-dfsdm-adc.c
+++ b/drivers/iio/adc/stm32-dfsdm-adc.c
@@ -9,6 +9,7 @@
 #include <linux/dmaengine.h>
 #include <linux/dma-mapping.h>
 #include <linux/iio/adc/stm32-dfsdm-adc.h>
+#include <linux/iio/backend.h>
 #include <linux/iio/buffer.h>
 #include <linux/iio/hw-consumer.h>
 #include <linux/iio/sysfs.h>
@@ -76,6 +77,7 @@ struct stm32_dfsdm_adc {
 
 	/* ADC specific */
 	unsigned int oversamp;
+	struct iio_backend **backend;
 	struct completion completion;
 	u32 *buffer;
 
@@ -599,6 +601,8 @@ static int stm32_dfsdm_channel_parse_of(struct stm32_dfsdm *dfsdm,
 					struct iio_chan_spec *ch)
 {
 	struct stm32_dfsdm_channel *df_ch;
+	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
+	struct iio_backend *backend;
 	const char *of_str;
 	int ret, val;
 
@@ -647,6 +651,9 @@ static int stm32_dfsdm_channel_parse_of(struct stm32_dfsdm *dfsdm,
 	if (ret != -EINVAL)
 		df_ch->alt_si = 0;
 
+	backend = iio_backend_get(node->dev);
+	adc->backend[df_ch->id] = backend;
+
 	return 0;
 }
 
@@ -1090,7 +1097,7 @@ static int stm32_dfsdm_single_conv(struct iio_dev *indio_dev,
 {
 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 	long timeout;
-	int ret;
+	int ret, idx = chan->scan_index;
 
 	reinit_completion(&adc->completion);
 
@@ -1100,6 +1107,8 @@ static int stm32_dfsdm_single_conv(struct iio_dev *indio_dev,
 	if (ret < 0)
 		return ret;
 
+	adc->backend[idx]->ops->enable(adc->backend[idx]);
+
 	ret = regmap_update_bits(adc->dfsdm->regmap, DFSDM_CR2(adc->fl_id),
 				 DFSDM_CR2_REOCIE_MASK, DFSDM_CR2_REOCIE(1));
 	if (ret < 0)
@@ -1133,6 +1142,8 @@ static int stm32_dfsdm_single_conv(struct iio_dev *indio_dev,
 	stm32_dfsdm_process_data(adc, res);
 
 stop_dfsdm:
+	adc->backend[idx]->ops->disable(adc->backend[idx]);
+
 	stm32_dfsdm_stop_dfsdm(adc->dfsdm);
 
 	return ret;
@@ -1197,7 +1208,14 @@ static int stm32_dfsdm_read_raw(struct iio_dev *indio_dev,
 				int *val2, long mask)
 {
 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
-	int ret;
+
+	struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[adc->fl_id];
+	struct stm32_dfsdm_filter_osr *flo = &fl->flo[fl->fast];
+	u32 max = flo->max << (flo->lshift - chan->scan_type.shift);
+	int ret, idx = chan->scan_index;
+
+	if (flo->lshift < chan->scan_type.shift)
+		max = flo->max >> (chan->scan_type.shift - flo->lshift);
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
@@ -1231,6 +1249,41 @@ static int stm32_dfsdm_read_raw(struct iio_dev *indio_dev,
 		*val = adc->sample_freq;
 
 		return IIO_VAL_INT;
+
+	case IIO_CHAN_INFO_SCALE:
+		/*
+		 * Scale is expressed in mV.
+		 * When fast mode is disabled, actual resolution may be lower
+		 * than 2^n, where n=realbits-1.
+		 * This leads to underestimating input voltage. To
+		 * compensate this deviation, the voltage reference can be
+		 * corrected with a factor = realbits resolution / actual max
+		 */
+		adc->backend[idx]->ops->read_raw(adc->backend[idx], val, val2, mask);
+
+		*val = div_u64((u64)*val * (u64)BIT(DFSDM_DATA_RES - 1), max);
+		*val2 = chan->scan_type.realbits;
+		if (chan->differential)
+			*val *= 2;
+		return IIO_VAL_FRACTIONAL_LOG2;
+
+	case IIO_CHAN_INFO_OFFSET:
+		/*
+		 * DFSDM output data are in the range [-2^n,2^n-1],
+		 * with n=realbits-1.
+		 * - Differential modulator:
+		 * Offset correspond to SD modulator offset.
+		 * - Single ended modulator:
+		 * Input is in [0V,Vref] range, where 0V corresponds to -2^n.
+		 * Add 2^n to offset. (i.e. middle of input range)
+		 * offset = offset(sd) * vref / res(sd) * max / vref.
+		 */
+		adc->backend[idx]->ops->read_raw(adc->backend[idx], val, val2, mask);
+
+		*val = div_u64((u64)max * *val, BIT(*val2 - 1));
+		if (chan->differential)
+			*val += max;
+		return IIO_VAL_INT;
 	}
 
 	return -EINVAL;
@@ -1358,7 +1411,10 @@ static int stm32_dfsdm_adc_chan_init_one(struct iio_dev *indio_dev,
 	 * IIO_CHAN_INFO_RAW: used to compute regular conversion
 	 * IIO_CHAN_INFO_OVERSAMPLING_RATIO: used to set oversampling
 	 */
-	ch->info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
+	ch->info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				 BIT(IIO_CHAN_INFO_SCALE) |
+				 BIT(IIO_CHAN_INFO_OFFSET);
+
 	ch->info_mask_shared_by_all = BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO) |
 					BIT(IIO_CHAN_INFO_SAMP_FREQ);
 
@@ -1454,6 +1510,8 @@ static int stm32_dfsdm_adc_init(struct device *dev, struct iio_dev *indio_dev)
 	if (ret < 0)
 		return ret;
 
+	adc->backend = devm_kzalloc(&indio_dev->dev, sizeof(*adc->backend) * num_ch, GFP_KERNEL);
+
 	indio_dev->num_channels = num_ch;
 	indio_dev->channels = ch;
 
