Merge tag 'iio-for-5.16b' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next

Jonathan writes:

2nd set of IIO new driver, cleanups and features for the 5.16 cycle

New device support
* adrf6780 microwave upconverter.
  - New driver for this interesting device including bindings.

Features
* lite-on ltr501
  - Add dt-bindings including vendor ID and of_device_id table.
  - Add regulator support.
* sensiron,scd4x
  - Add reporting of channel scale.

Cleanups including fixes for things in this cycle
* Tree wide: Another set of dev_err_probe() introductions to reduce
  noise in logs when deferred probing is needed and provide more debug
  info. Devices included this time:
  - amlogic,meson_saradc
  - capella,cm3605
  - fsl,imx7d
  - maxim,max1118
  - maxim,max1241
  - nxp,lpc18xx
  - qcom,pm8xxxx-xoadc
  - rockchip,saradc
  - sharp,gp2ap002
  - sterricson,ab8500
  - ti,ads7950
* core - iio:buffer
  - Fix a path where a ret value is not intialized.
* channel-mux
  - Add support to mux core subsystem for a settling delay and use
    it in the iio-channel-mux driver.
  - Fix a few dt binding warnings.
* nxp,lpc18xx
  - Convert to devm_ functions for all of probe and drop remove()
* st,lsm6dsx
  - Suppress a warning due to lack of handling of an enum *_MAX entry
    that is just there to get the size.
* st,stm32-adc
  - Add generic channel binding, deprecating the old approach.
  - Add nvmem support to get calibration data for the vrefint channel and
    use it to perform such calibration.
  - Add a binding for sample-time to the generic channel description as it
    can be per channel.
* ti,adc128s052
  - Use devm_ managed functions and drop remove()
* vti,sca3000
  - Use sign_extend32() rather than opencoding.
* xilinx,xadc
  - Drop irq field from state structure as now just used in probe.

* tag 'iio-for-5.16b' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (36 commits)
  dt-bindings: iio: frequency: add adrf6780 doc
  iio: frequency: adrf6780: add support for ADRF6780
  iio: chemical: scd4x: Add a scale for the co2 concentration reading
  dt-bindings: iio: io-channel-mux: allow duplicate channel, labels
  dt-bindings: iio: io-channel-mux: add optional #io-channel-cells
  iio: adc: adc128s052: Simplify adc128_probe()
  iio: multiplexer: iio-mux: Support settle-time-us property
  dt-bindings: iio: io-channel-mux: Add property for settle time
  mux: add support for delay after muxing
  iio: adc: stm32-adc: use generic binding for sample-time
  iio: adc: stm32-adc: add vrefint calibration support
  iio: adc: stm32-adc: add support of internal channels
  iio: adc: stm32-adc: add support of generic channels binding
  iio: adc: stm32-adc: split channel init into several routines
  dt-bindings: iio: stm32-adc: add nvmem support for vrefint internal channel
  dt-bindings: iio: stm32-adc: add generic channel binding
  iio: accel: sca3000: Use sign_extend32() instead of opencoding sign extension.
  iio: xilinx-xadc: Remove `irq` field from state struct
  iio: imu: st_lsm6dsx: Avoid potential array overflow in st_lsm6dsx_set_odr()
  iio: light: gp2ap002: Make use of the helper function dev_err_probe()
  ...

26 files changed, 1116 insertions, 231 deletions

diff --git a/drivers/iio/accel/sca3000.c b/drivers/iio/accel/sca3000.c
index cb753a43533c..c6b75308148a 100644
--- a/drivers/iio/accel/sca3000.c
+++ b/drivers/iio/accel/sca3000.c
@@ -731,8 +731,7 @@ static int sca3000_read_raw(struct iio_dev *indio_dev,
 				return ret;
 			}
 			*val = (be16_to_cpup((__be16 *)st->rx) >> 3) & 0x1FFF;
-			*val = ((*val) << (sizeof(*val) * 8 - 13)) >>
-				(sizeof(*val) * 8 - 13);
+			*val = sign_extend32(*val, 12);
 		} else {
 			/* get the temperature when available */
 			ret = sca3000_read_data_short(st,
diff --git a/drivers/iio/adc/ab8500-gpadc.c b/drivers/iio/adc/ab8500-gpadc.c
index 7b5212ba5501..4c46a201d4ef 100644
--- a/drivers/iio/adc/ab8500-gpadc.c
+++ b/drivers/iio/adc/ab8500-gpadc.c
@@ -1103,17 +1103,15 @@ static int ab8500_gpadc_probe(struct platform_device *pdev)
 		return ret;
 
 	gpadc->irq_sw = platform_get_irq_byname(pdev, "SW_CONV_END");
-	if (gpadc->irq_sw < 0) {
-		dev_err(dev, "failed to get platform sw_conv_end irq\n");
-		return gpadc->irq_sw;
-	}
+	if (gpadc->irq_sw < 0)
+		return dev_err_probe(dev, gpadc->irq_sw,
+				     "failed to get platform sw_conv_end irq\n");
 
 	if (is_ab8500(gpadc->ab8500)) {
 		gpadc->irq_hw = platform_get_irq_byname(pdev, "HW_CONV_END");
-		if (gpadc->irq_hw < 0) {
-			dev_err(dev, "failed to get platform hw_conv_end irq\n");
-			return gpadc->irq_hw;
-		}
+		if (gpadc->irq_hw < 0)
+			return dev_err_probe(dev, gpadc->irq_hw,
+					     "failed to get platform hw_conv_end irq\n");
 	} else {
 		gpadc->irq_hw = 0;
 	}
@@ -1146,11 +1144,9 @@ static int ab8500_gpadc_probe(struct platform_device *pdev)
 
 	/* The VTVout LDO used to power the AB8500 GPADC */
 	gpadc->vddadc = devm_regulator_get(dev, "vddadc");
-	if (IS_ERR(gpadc->vddadc)) {
-		ret = PTR_ERR(gpadc->vddadc);
-		dev_err(dev, "failed to get vddadc\n");
-		return ret;
-	}
+	if (IS_ERR(gpadc->vddadc))
+		return dev_err_probe(dev, PTR_ERR(gpadc->vddadc),
+				     "failed to get vddadc\n");
 
 	ret = regulator_enable(gpadc->vddadc);
 	if (ret) {
diff --git a/drivers/iio/adc/imx7d_adc.c b/drivers/iio/adc/imx7d_adc.c
index 4969a5f941e3..092f8d296527 100644
--- a/drivers/iio/adc/imx7d_adc.c
+++ b/drivers/iio/adc/imx7d_adc.c
@@ -493,22 +493,16 @@ static int imx7d_adc_probe(struct platform_device *pdev)
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
-		return irq;
+		return dev_err_probe(dev, irq, "Failed getting irq\n");
 
 	info->clk = devm_clk_get(dev, "adc");
-	if (IS_ERR(info->clk)) {
-		ret = PTR_ERR(info->clk);
-		dev_err(dev, "Failed getting clock, err = %d\n", ret);
-		return ret;
-	}
+	if (IS_ERR(info->clk))
+		return dev_err_probe(dev, PTR_ERR(info->clk), "Failed getting clock\n");
 
 	info->vref = devm_regulator_get(dev, "vref");
-	if (IS_ERR(info->vref)) {
-		ret = PTR_ERR(info->vref);
-		dev_err(dev,
-			"Failed getting reference voltage, err = %d\n", ret);
-		return ret;
-	}
+	if (IS_ERR(info->vref))
+		return dev_err_probe(dev, PTR_ERR(info->vref),
+				     "Failed getting reference voltage\n");
 
 	platform_set_drvdata(pdev, indio_dev);
 
diff --git a/drivers/iio/adc/lpc18xx_adc.c b/drivers/iio/adc/lpc18xx_adc.c
index 3566990ae87d..ceefa4d793cf 100644
--- a/drivers/iio/adc/lpc18xx_adc.c
+++ b/drivers/iio/adc/lpc18xx_adc.c
@@ -115,6 +115,23 @@ static const struct iio_info lpc18xx_adc_info = {
 	.read_raw = lpc18xx_adc_read_raw,
 };
 
+static void lpc18xx_clear_cr_reg(void *data)
+{
+	struct lpc18xx_adc *adc = data;
+
+	writel(0, adc->base + LPC18XX_ADC_CR);
+}
+
+static void lpc18xx_clk_disable(void *clk)
+{
+	clk_disable_unprepare(clk);
+}
+
+static void lpc18xx_regulator_disable(void *vref)
+{
+	regulator_disable(vref);
+}
+
 static int lpc18xx_adc_probe(struct platform_device *pdev)
 {
 	struct iio_dev *indio_dev;
@@ -127,7 +144,6 @@ static int lpc18xx_adc_probe(struct platform_device *pdev)
 	if (!indio_dev)
 		return -ENOMEM;
 
-	platform_set_drvdata(pdev, indio_dev);
 	adc = iio_priv(indio_dev);
 	adc->dev = &pdev->dev;
 	mutex_init(&adc->lock);
@@ -137,19 +153,17 @@ static int lpc18xx_adc_probe(struct platform_device *pdev)
 		return PTR_ERR(adc->base);
 
 	adc->clk = devm_clk_get(&pdev->dev, NULL);
-	if (IS_ERR(adc->clk)) {
-		dev_err(&pdev->dev, "error getting clock\n");
-		return PTR_ERR(adc->clk);
-	}
+	if (IS_ERR(adc->clk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(adc->clk),
+				     "error getting clock\n");
 
 	rate = clk_get_rate(adc->clk);
 	clkdiv = DIV_ROUND_UP(rate, LPC18XX_ADC_CLK_TARGET);
 
 	adc->vref = devm_regulator_get(&pdev->dev, "vref");
-	if (IS_ERR(adc->vref)) {
-		dev_err(&pdev->dev, "error getting regulator\n");
-		return PTR_ERR(adc->vref);
-	}
+	if (IS_ERR(adc->vref))
+		return dev_err_probe(&pdev->dev, PTR_ERR(adc->vref),
+				     "error getting regulator\n");
 
 	indio_dev->name = dev_name(&pdev->dev);
 	indio_dev->info = &lpc18xx_adc_info;
@@ -163,44 +177,30 @@ static int lpc18xx_adc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	ret = devm_add_action_or_reset(&pdev->dev, lpc18xx_regulator_disable, adc->vref);
+	if (ret)
+		return ret;
+
 	ret = clk_prepare_enable(adc->clk);
 	if (ret) {
 		dev_err(&pdev->dev, "unable to enable clock\n");
-		goto dis_reg;
+		return ret;
 	}
 
+	ret = devm_add_action_or_reset(&pdev->dev, lpc18xx_clk_disable,
+				       adc->clk);
+	if (ret)
+		return ret;
+
 	adc->cr_reg = (clkdiv << LPC18XX_ADC_CR_CLKDIV_SHIFT) |
 			LPC18XX_ADC_CR_PDN;
 	writel(adc->cr_reg, adc->base + LPC18XX_ADC_CR);
 
-	ret = iio_device_register(indio_dev);
-	if (ret) {
-		dev_err(&pdev->dev, "unable to register device\n");
-		goto dis_clk;
-	}
-
-	return 0;
-
-dis_clk:
-	writel(0, adc->base + LPC18XX_ADC_CR);
-	clk_disable_unprepare(adc->clk);
-dis_reg:
-	regulator_disable(adc->vref);
-	return ret;
-}
-
-static int lpc18xx_adc_remove(struct platform_device *pdev)
-{
-	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
-	struct lpc18xx_adc *adc = iio_priv(indio_dev);
-
-	iio_device_unregister(indio_dev);
-
-	writel(0, adc->base + LPC18XX_ADC_CR);
-	clk_disable_unprepare(adc->clk);
-	regulator_disable(adc->vref);
+	ret = devm_add_action_or_reset(&pdev->dev, lpc18xx_clear_cr_reg, adc);
+	if (ret)
+		return ret;
 
-	return 0;
+	return devm_iio_device_register(&pdev->dev, indio_dev);
 }
 
 static const struct of_device_id lpc18xx_adc_match[] = {
@@ -211,7 +211,6 @@ MODULE_DEVICE_TABLE(of, lpc18xx_adc_match);
 
 static struct platform_driver lpc18xx_adc_driver = {
 	.probe	= lpc18xx_adc_probe,
-	.remove	= lpc18xx_adc_remove,
 	.driver	= {
 		.name = "lpc18xx-adc",
 		.of_match_table = lpc18xx_adc_match,
diff --git a/drivers/iio/adc/max1118.c b/drivers/iio/adc/max1118.c
index 8cec9d949083..a41bc570be21 100644
--- a/drivers/iio/adc/max1118.c
+++ b/drivers/iio/adc/max1118.c
@@ -221,10 +221,9 @@ static int max1118_probe(struct spi_device *spi)
 
 	if (id->driver_data == max1118) {
 		adc->reg = devm_regulator_get(&spi->dev, "vref");
-		if (IS_ERR(adc->reg)) {
-			dev_err(&spi->dev, "failed to get vref regulator\n");
-			return PTR_ERR(adc->reg);
-		}
+		if (IS_ERR(adc->reg))
+			return dev_err_probe(&spi->dev, PTR_ERR(adc->reg),
+					     "failed to get vref regulator\n");
 		ret = regulator_enable(adc->reg);
 		if (ret)
 			return ret;
diff --git a/drivers/iio/adc/max1241.c b/drivers/iio/adc/max1241.c
index b60f8448f21a..a5afd84af58b 100644
--- a/drivers/iio/adc/max1241.c
+++ b/drivers/iio/adc/max1241.c
@@ -148,10 +148,9 @@ static int max1241_probe(struct spi_device *spi)
 	mutex_init(&adc->lock);
 
 	adc->vdd = devm_regulator_get(dev, "vdd");
-	if (IS_ERR(adc->vdd)) {
-		dev_err(dev, "failed to get vdd regulator\n");
-		return PTR_ERR(adc->vdd);
-	}
+	if (IS_ERR(adc->vdd))
+		return dev_err_probe(dev, PTR_ERR(adc->vdd),
+				     "failed to get vdd regulator\n");
 
 	ret = regulator_enable(adc->vdd);
 	if (ret)
@@ -164,10 +163,9 @@ static int max1241_probe(struct spi_device *spi)
 	}
 
 	adc->vref = devm_regulator_get(dev, "vref");
-	if (IS_ERR(adc->vref)) {
-		dev_err(dev, "failed to get vref regulator\n");
-		return PTR_ERR(adc->vref);
-	}
+	if (IS_ERR(adc->vref))
+		return dev_err_probe(dev, PTR_ERR(adc->vref),
+				     "failed to get vref regulator\n");
 
 	ret = regulator_enable(adc->vref);
 	if (ret)
@@ -182,7 +180,8 @@ static int max1241_probe(struct spi_device *spi)
 	adc->shutdown = devm_gpiod_get_optional(dev, "shutdown",
 						GPIOD_OUT_HIGH);
 	if (IS_ERR(adc->shutdown))
-		return PTR_ERR(adc->shutdown);
+		return dev_err_probe(dev, PTR_ERR(adc->shutdown),
+				     "cannot get shutdown gpio\n");
 
 	if (adc->shutdown)
 		dev_dbg(dev, "shutdown pin passed, low-power mode enabled");
diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 705d5e11a54b..62cc6fb0ef85 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -1230,35 +1230,31 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 		return ret;
 
 	priv->clkin = devm_clk_get(&pdev->dev, "clkin");
-	if (IS_ERR(priv->clkin)) {
-		dev_err(&pdev->dev, "failed to get clkin\n");
-		return PTR_ERR(priv->clkin);
-	}
+	if (IS_ERR(priv->clkin))
+		return dev_err_probe(&pdev->dev, PTR_ERR(priv->clkin),
+				     "failed to get clkin\n");
 
 	priv->core_clk = devm_clk_get(&pdev->dev, "core");
-	if (IS_ERR(priv->core_clk)) {
-		dev_err(&pdev->dev, "failed to get core clk\n");
-		return PTR_ERR(priv->core_clk);
-	}
+	if (IS_ERR(priv->core_clk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(priv->core_clk),
+				     "failed to get core clk\n");
 
 	priv->adc_clk = devm_clk_get(&pdev->dev, "adc_clk");
 	if (IS_ERR(priv->adc_clk)) {
-		if (PTR_ERR(priv->adc_clk) == -ENOENT) {
+		if (PTR_ERR(priv->adc_clk) == -ENOENT)
 			priv->adc_clk = NULL;
-		} else {
-			dev_err(&pdev->dev, "failed to get adc clk\n");
-			return PTR_ERR(priv->adc_clk);
-		}
+		else
+			return dev_err_probe(&pdev->dev, PTR_ERR(priv->adc_clk),
+					     "failed to get adc clk\n");
 	}
 
 	priv->adc_sel_clk = devm_clk_get(&pdev->dev, "adc_sel");
 	if (IS_ERR(priv->adc_sel_clk)) {
-		if (PTR_ERR(priv->adc_sel_clk) == -ENOENT) {
+		if (PTR_ERR(priv->adc_sel_clk) == -ENOENT)
 			priv->adc_sel_clk = NULL;
-		} else {
-			dev_err(&pdev->dev, "failed to get adc_sel clk\n");
-			return PTR_ERR(priv->adc_sel_clk);
-		}
+		else
+			return dev_err_probe(&pdev->dev, PTR_ERR(priv->adc_sel_clk),
+					     "failed to get adc_sel clk\n");
 	}
 
 	/* on pre-GXBB SoCs the SAR ADC itself provides the ADC clock: */
@@ -1269,10 +1265,9 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 	}
 
 	priv->vref = devm_regulator_get(&pdev->dev, "vref");
-	if (IS_ERR(priv->vref)) {
-		dev_err(&pdev->dev, "failed to get vref regulator\n");
-		return PTR_ERR(priv->vref);
-	}
+	if (IS_ERR(priv->vref))
+		return dev_err_probe(&pdev->dev, PTR_ERR(priv->vref),
+				     "failed to get vref regulator\n");
 
 	priv->calibscale = MILLION;
 
diff --git a/drivers/iio/adc/qcom-pm8xxx-xoadc.c b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
index 0610bf254771..21d7eff645c3 100644
--- a/drivers/iio/adc/qcom-pm8xxx-xoadc.c
+++ b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
@@ -910,16 +910,15 @@ static int pm8xxx_xoadc_probe(struct platform_device *pdev)
 	map = dev_get_regmap(dev->parent, NULL);
 	if (!map) {
 		dev_err(dev, "parent regmap unavailable.\n");
-		return -ENXIO;
+		return -ENODEV;
 	}
 	adc->map = map;
 
 	/* Bring up regulator */
 	adc->vref = devm_regulator_get(dev, "xoadc-ref");
-	if (IS_ERR(adc->vref)) {
-		dev_err(dev, "failed to get XOADC VREF regulator\n");
-		return PTR_ERR(adc->vref);
-	}
+	if (IS_ERR(adc->vref))
+		return dev_err_probe(dev, PTR_ERR(adc->vref),
+				     "failed to get XOADC VREF regulator\n");
 	ret = regulator_enable(adc->vref);
 	if (ret) {
 		dev_err(dev, "failed to enable XOADC VREF regulator\n");
diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
index a56a0d7337ca..14b8df4ca9c8 100644
--- a/drivers/iio/adc/rockchip_saradc.c
+++ b/drivers/iio/adc/rockchip_saradc.c
@@ -360,7 +360,8 @@ static int rockchip_saradc_probe(struct platform_device *pdev)
 	if (IS_ERR(info->reset)) {
 		ret = PTR_ERR(info->reset);
 		if (ret != -ENOENT)
-			return ret;
+			return dev_err_probe(&pdev->dev, ret,
+					     "failed to get saradc-apb\n");
 
 		dev_dbg(&pdev->dev, "no reset control found\n");
 		info->reset = NULL;
@@ -370,7 +371,7 @@ static int rockchip_saradc_probe(struct platform_device *pdev)
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
-		return irq;
+		return dev_err_probe(&pdev->dev, irq, "failed to get irq\n");
 
 	ret = devm_request_irq(&pdev->dev, irq, rockchip_saradc_isr,
 			       0, dev_name(&pdev->dev), info);
@@ -380,23 +381,19 @@ static int rockchip_saradc_probe(struct platform_device *pdev)
 	}
 
 	info->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
-	if (IS_ERR(info->pclk)) {
-		dev_err(&pdev->dev, "failed to get pclk\n");
-		return PTR_ERR(info->pclk);
-	}
+	if (IS_ERR(info->pclk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(info->pclk),
+				     "failed to get pclk\n");
 
 	info->clk = devm_clk_get(&pdev->dev, "saradc");
-	if (IS_ERR(info->clk)) {
-		dev_err(&pdev->dev, "failed to get adc clock\n");
-		return PTR_ERR(info->clk);
-	}
+	if (IS_ERR(info->clk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(info->clk),
+				     "failed to get adc clock\n");
 
 	info->vref = devm_regulator_get(&pdev->dev, "vref");
-	if (IS_ERR(info->vref)) {
-		dev_err(&pdev->dev, "failed to get regulator, %ld\n",
-			PTR_ERR(info->vref));
-		return PTR_ERR(info->vref);
-	}
+	if (IS_ERR(info->vref))
+		return dev_err_probe(&pdev->dev, PTR_ERR(info->vref),
+				     "failed to get regulator\n");
 
 	if (info->reset)
 		rockchip_saradc_reset_controller(info->reset);
diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
index c088cb990193..b6e18eb101f7 100644
--- a/drivers/iio/adc/stm32-adc-core.c
+++ b/drivers/iio/adc/stm32-adc-core.c
@@ -659,6 +659,7 @@ static int stm32_adc_probe(struct platform_device *pdev)
 
 	priv->cfg = (const struct stm32_adc_priv_cfg *)
 		of_match_device(dev->driver->of_match_table, dev)->data;
+	spin_lock_init(&priv->common.lock);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	priv->common.base = devm_ioremap_resource(&pdev->dev, res);
diff --git a/drivers/iio/adc/stm32-adc-core.h b/drivers/iio/adc/stm32-adc-core.h
index 2322809bfd2f..faedf7a49555 100644
--- a/drivers/iio/adc/stm32-adc-core.h
+++ b/drivers/iio/adc/stm32-adc-core.h
@@ -102,6 +102,9 @@
 #define STM32H7_ADC_CALFACT		0xC4
 #define STM32H7_ADC_CALFACT2		0xC8
 
+/* STM32MP1 - ADC2 instance option register */
+#define STM32MP1_ADC2_OR		0xD0
+
 /* STM32H7 - common registers for all ADC instances */
 #define STM32H7_ADC_CSR			(STM32_ADCX_COMN_OFFSET + 0x00)
 #define STM32H7_ADC_CCR			(STM32_ADCX_COMN_OFFSET + 0x08)
@@ -168,23 +171,30 @@ enum stm32h7_adc_dmngt {
 #define STM32H7_EOC_MST			BIT(2)
 
 /* STM32H7_ADC_CCR - bit fields */
+#define STM32H7_VBATEN			BIT(24)
+#define STM32H7_VREFEN			BIT(22)
 #define STM32H7_PRESC_SHIFT		18
 #define STM32H7_PRESC_MASK		GENMASK(21, 18)
 #define STM32H7_CKMODE_SHIFT		16
 #define STM32H7_CKMODE_MASK		GENMASK(17, 16)
 
+/* STM32MP1_ADC2_OR - bit fields */
+#define STM32MP1_VDDCOREEN		BIT(0)
+
 /**
  * struct stm32_adc_common - stm32 ADC driver common data (for all instances)
  * @base:		control registers base cpu addr
  * @phys_base:		control registers base physical addr
  * @rate:		clock rate used for analog circuitry
  * @vref_mv:		vref voltage (mv)
+ * @lock:		spinlock
  */
 struct stm32_adc_common {
 	void __iomem			*base;
 	phys_addr_t			phys_base;
 	unsigned long			rate;
 	int				vref_mv;
+	spinlock_t			lock;		/* lock for common register */
 };
 
 #endif
diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
index 5088de835bb1..6245434f8377 100644
--- a/drivers/iio/adc/stm32-adc.c
+++ b/drivers/iio/adc/stm32-adc.c
@@ -21,6 +21,7 @@
 #include <linux/io.h>
 #include <linux/iopoll.h>
 #include <linux/module.h>
+#include <linux/nvmem-consumer.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
@@ -35,12 +36,13 @@
 #define STM32H7_BOOST_CLKRATE		20000000UL
 
 #define STM32_ADC_CH_MAX		20	/* max number of channels */
-#define STM32_ADC_CH_SZ			10	/* max channel name size */
+#define STM32_ADC_CH_SZ			16	/* max channel name size */
 #define STM32_ADC_MAX_SQ		16	/* SQ1..SQ16 */
 #define STM32_ADC_MAX_SMP		7	/* SMPx range is [0..7] */
 #define STM32_ADC_TIMEOUT_US		100000
 #define STM32_ADC_TIMEOUT	(msecs_to_jiffies(STM32_ADC_TIMEOUT_US / 1000))
 #define STM32_ADC_HW_STOP_DELAY_MS	100
+#define STM32_ADC_VREFINT_VOLTAGE	3300
 
 #define STM32_DMA_BUFFER_SIZE		PAGE_SIZE
 
@@ -77,6 +79,30 @@ enum stm32_adc_extsel {
 	STM32_EXT20,
 };
 
+enum stm32_adc_int_ch {
+	STM32_ADC_INT_CH_NONE = -1,
+	STM32_ADC_INT_CH_VDDCORE,
+	STM32_ADC_INT_CH_VREFINT,
+	STM32_ADC_INT_CH_VBAT,
+	STM32_ADC_INT_CH_NB,
+};
+
+/**
+ * struct stm32_adc_ic - ADC internal channels
+ * @name:	name of the internal channel
+ * @idx:	internal channel enum index
+ */
+struct stm32_adc_ic {
+	const char *name;
+	u32 idx;
+};
+
+static const struct stm32_adc_ic stm32_adc_ic[STM32_ADC_INT_CH_NB] = {
+	{ "vddcore", STM32_ADC_INT_CH_VDDCORE },
+	{ "vrefint", STM32_ADC_INT_CH_VREFINT },
+	{ "vbat", STM32_ADC_INT_CH_VBAT },
+};
+
 /**
  * struct stm32_adc_trig_info - ADC trigger info
  * @name:		name of the trigger, corresponding to its source
@@ -114,6 +140,16 @@ struct stm32_adc_regs {
 };
 
 /**
+ * struct stm32_adc_vrefint - stm32 ADC internal reference voltage data
+ * @vrefint_cal:	vrefint calibration value from nvmem
+ * @vrefint_data:	vrefint actual value
+ */
+struct stm32_adc_vrefint {
+	u32 vrefint_cal;
+	u32 vrefint_data;
+};
+
+/**
  * struct stm32_adc_regspec - stm32 registers definition
  * @dr:			data register offset
  * @ier_eoc:		interrupt enable register & eocie bitfield
@@ -126,6 +162,9 @@ struct stm32_adc_regs {
  * @res:		resolution selection register & bitfield
  * @smpr:		smpr1 & smpr2 registers offset array
  * @smp_bits:		smpr1 & smpr2 index and bitfields
+ * @or_vdd:		option register & vddcore bitfield
+ * @ccr_vbat:		common register & vbat bitfield
+ * @ccr_vref:		common register & vrefint bitfield
  */
 struct stm32_adc_regspec {
 	const u32 dr;
@@ -139,6 +178,9 @@ struct stm32_adc_regspec {
 	const struct stm32_adc_regs res;
 	const u32 smpr[2];
 	const struct stm32_adc_regs *smp_bits;
+	const struct stm32_adc_regs or_vdd;
+	const struct stm32_adc_regs ccr_vbat;
+	const struct stm32_adc_regs ccr_vref;
 };
 
 struct stm32_adc;
@@ -156,6 +198,7 @@ struct stm32_adc;
  * @unprepare:		optional unprepare routine (disable, power-down)
  * @irq_clear:		routine to clear irqs
  * @smp_cycles:		programmable sampling time (ADC clock cycles)
+ * @ts_vrefint_ns:	vrefint minimum sampling time in ns
  */
 struct stm32_adc_cfg {
 	const struct stm32_adc_regspec	*regs;
@@ -169,6 +212,7 @@ struct stm32_adc_cfg {
 	void (*unprepare)(struct iio_dev *);
 	void (*irq_clear)(struct iio_dev *indio_dev, u32 msk);
 	const unsigned int *smp_cycles;
+	const unsigned int ts_vrefint_ns;
 };
 
 /**
@@ -193,7 +237,10 @@ struct stm32_adc_cfg {
  * @pcsel:		bitmask to preselect channels on some devices
  * @smpr_val:		sampling time settings (e.g. smpr1 / smpr2)
  * @cal:		optional calibration data on some devices
+ * @vrefint:		internal reference voltage data
  * @chan_name:		channel name array
+ * @num_diff:		number of differential channels
+ * @int_ch:		internal channel indexes array
  */
 struct stm32_adc {
 	struct stm32_adc_common	*common;
@@ -216,7 +263,10 @@ struct stm32_adc {
 	u32			pcsel;
 	u32			smpr_val[2];
 	struct stm32_adc_calib	cal;
+	struct stm32_adc_vrefint vrefint;
 	char			chan_name[STM32_ADC_CH_MAX][STM32_ADC_CH_SZ];
+	u32			num_diff;
+	int			int_ch[STM32_ADC_INT_CH_NB];
 };
 
 struct stm32_adc_diff_channel {
@@ -449,6 +499,24 @@ static const struct stm32_adc_regspec stm32h7_adc_regspec = {
 	.smp_bits = stm32h7_smp_bits,
 };
 
+static const struct stm32_adc_regspec stm32mp1_adc_regspec = {
+	.dr = STM32H7_ADC_DR,
+	.ier_eoc = { STM32H7_ADC_IER, STM32H7_EOCIE },
+	.ier_ovr = { STM32H7_ADC_IER, STM32H7_OVRIE },
+	.isr_eoc = { STM32H7_ADC_ISR, STM32H7_EOC },
+	.isr_ovr = { STM32H7_ADC_ISR, STM32H7_OVR },
+	.sqr = stm32h7_sq,
+	.exten = { STM32H7_ADC_CFGR, STM32H7_EXTEN_MASK, STM32H7_EXTEN_SHIFT },
+	.extsel = { STM32H7_ADC_CFGR, STM32H7_EXTSEL_MASK,
+		    STM32H7_EXTSEL_SHIFT },
+	.res = { STM32H7_ADC_CFGR, STM32H7_RES_MASK, STM32H7_RES_SHIFT },
+	.smpr = { STM32H7_ADC_SMPR1, STM32H7_ADC_SMPR2 },
+	.smp_bits = stm32h7_smp_bits,
+	.or_vdd = { STM32MP1_ADC2_OR, STM32MP1_VDDCOREEN },
+	.ccr_vbat = { STM32H7_ADC_CCR, STM32H7_VBATEN },
+	.ccr_vref = { STM32H7_ADC_CCR, STM32H7_VREFEN },
+};
+
 /*
  * STM32 ADC registers access routines
  * @adc: stm32 adc instance
@@ -487,6 +555,14 @@ static void stm32_adc_set_bits(struct stm32_adc *adc, u32 reg, u32 bits)
 	spin_unlock_irqrestore(&adc->lock, flags);
 }
 
+static void stm32_adc_set_bits_common(struct stm32_adc *adc, u32 reg, u32 bits)
+{
+	spin_lock(&adc->common->lock);
+	writel_relaxed(readl_relaxed(adc->common->base + reg) | bits,
+		       adc->common->base + reg);
+	spin_unlock(&adc->common->lock);
+}
+
 static void stm32_adc_clr_bits(struct stm32_adc *adc, u32 reg, u32 bits)
 {
 	unsigned long flags;
@@ -496,6 +572,14 @@ static void stm32_adc_clr_bits(struct stm32_adc *adc, u32 reg, u32 bits)
 	spin_unlock_irqrestore(&adc->lock, flags);
 }
 
+static void stm32_adc_clr_bits_common(struct stm32_adc *adc, u32 reg, u32 bits)
+{
+	spin_lock(&adc->common->lock);
+	writel_relaxed(readl_relaxed(adc->common->base + reg) & ~bits,
+		       adc->common->base + reg);
+	spin_unlock(&adc->common->lock);
+}
+
 /**
  * stm32_adc_conv_irq_enable() - Enable end of conversion interrupt
  * @adc: stm32 adc instance
@@ -577,6 +661,60 @@ err_clk_dis:
 	return ret;
 }
 
+static void stm32_adc_int_ch_enable(struct iio_dev *indio_dev)
+{
+	struct stm32_adc *adc = iio_priv(indio_dev);
+	u32 i;
+
+	for (i = 0; i < STM32_ADC_INT_CH_NB; i++) {
+		if (adc->int_ch[i] == STM32_ADC_INT_CH_NONE)
+			continue;
+
+		switch (i) {
+		case STM32_ADC_INT_CH_VDDCORE:
+			dev_dbg(&indio_dev->dev, "Enable VDDCore\n");
+			stm32_adc_set_bits(adc, adc->cfg->regs->or_vdd.reg,
+					   adc->cfg->regs->or_vdd.mask);
+			break;
+		case STM32_ADC_INT_CH_VREFINT:
+			dev_dbg(&indio_dev->dev, "Enable VREFInt\n");
+			stm32_adc_set_bits_common(adc, adc->cfg->regs->ccr_vref.reg,
+						  adc->cfg->regs->ccr_vref.mask);
+			break;
+		case STM32_ADC_INT_CH_VBAT:
+			dev_dbg(&indio_dev->dev, "Enable VBAT\n");
+			stm32_adc_set_bits_common(adc, adc->cfg->regs->ccr_vbat.reg,
+						  adc->cfg->regs->ccr_vbat.mask);
+			break;
+		}
+	}
+}
+
+static void stm32_adc_int_ch_disable(struct stm32_adc *adc)
+{
+	u32 i;
+
+	for (i = 0; i < STM32_ADC_INT_CH_NB; i++) {
+		if (adc->int_ch[i] == STM32_ADC_INT_CH_NONE)
+			continue;
+
+		switch (i) {
+		case STM32_ADC_INT_CH_VDDCORE:
+			stm32_adc_clr_bits(adc, adc->cfg->regs->or_vdd.reg,
+					   adc->cfg->regs->or_vdd.mask);
+			break;
+		case STM32_ADC_INT_CH_VREFINT:
+			stm32_adc_clr_bits_common(adc, adc->cfg->regs->ccr_vref.reg,
+						  adc->cfg->regs->ccr_vref.mask);
+			break;
+		case STM32_ADC_INT_CH_VBAT:
+			stm32_adc_clr_bits_common(adc, adc->cfg->regs->ccr_vbat.reg,
+						  adc->cfg->regs->ccr_vbat.mask);
+			break;
+		}
+	}
+}
+
 /**
  * stm32f4_adc_start_conv() - Start conversions for regular channels.
  * @indio_dev: IIO device instance
@@ -945,11 +1083,13 @@ static int stm32h7_adc_prepare(struct iio_dev *indio_dev)
 		goto pwr_dwn;
 	calib = ret;
 
+	stm32_adc_int_ch_enable(indio_dev);
+
 	stm32_adc_writel(adc, STM32H7_ADC_DIFSEL, adc->difsel);
 
 	ret = stm32h7_adc_enable(indio_dev);
 	if (ret)
-		goto pwr_dwn;
+		goto ch_disable;
 
 	/* Either restore or read calibration result for future reference */
 	if (calib)
@@ -965,6 +1105,8 @@ static int stm32h7_adc_prepare(struct iio_dev *indio_dev)
 
 disable:
 	stm32h7_adc_disable(indio_dev);
+ch_disable:
+	stm32_adc_int_ch_disable(adc);
 pwr_dwn:
 	stm32h7_adc_enter_pwr_down(adc);
 
@@ -976,6 +1118,7 @@ static void stm32h7_adc_unprepare(struct iio_dev *indio_dev)
 	struct stm32_adc *adc = iio_priv(indio_dev);
 
 	stm32h7_adc_disable(indio_dev);
+	stm32_adc_int_ch_disable(adc);
 	stm32h7_adc_enter_pwr_down(adc);
 }
 
@@ -1212,6 +1355,7 @@ static int stm32_adc_read_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
+	case IIO_CHAN_INFO_PROCESSED:
 		ret = iio_device_claim_direct_mode(indio_dev);
 		if (ret)
 			return ret;
@@ -1219,6 +1363,10 @@ static int stm32_adc_read_raw(struct iio_dev *indio_dev,
 			ret = stm32_adc_single_conv(indio_dev, chan, val);
 		else
 			ret = -EINVAL;
+
+		if (mask == IIO_CHAN_INFO_PROCESSED && adc->vrefint.vrefint_cal)
+			*val = STM32_ADC_VREFINT_VOLTAGE * adc->vrefint.vrefint_cal / *val;
+
 		iio_device_release_direct_mode(indio_dev);
 		return ret;
 
@@ -1657,6 +1805,13 @@ static void stm32_adc_smpr_init(struct stm32_adc *adc, int channel, u32 smp_ns)
 	u32 period_ns, shift = smpr->shift, mask = smpr->mask;
 	unsigned int smp, r = smpr->reg;
 
+	/*
+	 * For vrefint channel, ensure that the sampling time cannot
+	 * be lower than the one specified in the datasheet
+	 */
+	if (channel == adc->int_ch[STM32_ADC_INT_CH_VREFINT])
+		smp_ns = max(smp_ns, adc->cfg->ts_vrefint_ns);
+
 	/* Determine sampling time (ADC clock cycles) */
 	period_ns = NSEC_PER_SEC / adc->common->rate;
 	for (smp = 0; smp <= STM32_ADC_MAX_SMP; smp++)
@@ -1688,7 +1843,10 @@ static void stm32_adc_chan_init_one(struct iio_dev *indio_dev,
 	chan->datasheet_name = name;
 	chan->scan_index = scan_index;
 	chan->indexed = 1;
-	chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
+	if (chan->channel == adc->int_ch[STM32_ADC_INT_CH_VREFINT])
+		chan->info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED);
+	else
+		chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
 	chan->info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
 					 BIT(IIO_CHAN_INFO_OFFSET);
 	chan->scan_type.sign = 'u';
@@ -1706,17 +1864,11 @@ static void stm32_adc_chan_init_one(struct iio_dev *indio_dev,
 	}
 }
 
-static int stm32_adc_chan_of_init(struct iio_dev *indio_dev, bool timestamping)
+static int stm32_adc_get_legacy_chan_count(struct iio_dev *indio_dev, struct stm32_adc *adc)
 {
 	struct device_node *node = indio_dev->dev.of_node;
-	struct stm32_adc *adc = iio_priv(indio_dev);
 	const struct stm32_adc_info *adc_info = adc->cfg->adc_info;
-	struct stm32_adc_diff_channel diff[STM32_ADC_CH_MAX];
-	struct property *prop;
-	const __be32 *cur;
-	struct iio_chan_spec *channels;
-	int scan_index = 0, num_channels = 0, num_diff = 0, ret, i;
-	u32 val, smp = 0;
+	int num_channels = 0, ret;
 
 	ret = of_property_count_u32_elems(node, "st,adc-channels");
 	if (ret > adc_info->max_channels) {
@@ -1727,24 +1879,13 @@ static int stm32_adc_chan_of_init(struct iio_dev *indio_dev, bool timestamping)
 	}
 
 	ret = of_property_count_elems_of_size(node, "st,adc-diff-channels",
-					      sizeof(*diff));
+					      sizeof(struct stm32_adc_diff_channel));
 	if (ret > adc_info->max_channels) {
 		dev_err(&indio_dev->dev, "Bad st,adc-diff-channels?\n");
 		return -EINVAL;
 	} else if (ret > 0) {
-		int size = ret * sizeof(*diff) / sizeof(u32);
-
-		num_diff = ret;
+		adc->num_diff = ret;
 		num_channels += ret;
-		ret = of_property_read_u32_array(node, "st,adc-diff-channels",
-						 (u32 *)diff, size);
-		if (ret)
-			return ret;
-	}
-
-	if (!num_channels) {
-		dev_err(&indio_dev->dev, "No channels configured\n");
-		return -ENODATA;
 	}
 
 	/* Optional sample time is provided either for each, or all channels */
@@ -1754,13 +1895,45 @@ static int stm32_adc_chan_of_init(struct iio_dev *indio_dev, bool timestamping)
 		return -EINVAL;
 	}
 
-	if (timestamping)
-		num_channels++;
+	return num_channels;
+}
 
-	channels = devm_kcalloc(&indio_dev->dev, num_channels,
-				sizeof(struct iio_chan_spec), GFP_KERNEL);
-	if (!channels)
-		return -ENOMEM;
+static int stm32_adc_legacy_chan_init(struct iio_dev *indio_dev,
+				      struct stm32_adc *adc,
+				      struct iio_chan_spec *channels)
+{
+	struct device_node *node = indio_dev->dev.of_node;
+	const struct stm32_adc_info *adc_info = adc->cfg->adc_info;
+	struct stm32_adc_diff_channel diff[STM32_ADC_CH_MAX];
+	u32 num_diff = adc->num_diff;
+	int size = num_diff * sizeof(*diff) / sizeof(u32);
+	int scan_index = 0, val, ret, i;
+	struct property *prop;
+	const __be32 *cur;
+	u32 smp = 0;
+
+	if (num_diff) {
+		ret = of_property_read_u32_array(node, "st,adc-diff-channels",
+						 (u32 *)diff, size);
+		if (ret) {
+			dev_err(&indio_dev->dev, "Failed to get diff channels %d\n", ret);
+			return ret;
+		}
+
+		for (i = 0; i < num_diff; i++) {
+			if (diff[i].vinp >= adc_info->max_channels ||
+			    diff[i].vinn >= adc_info->max_channels) {
+				dev_err(&indio_dev->dev, "Invalid channel in%d-in%d\n",
+					diff[i].vinp, diff[i].vinn);
+				return -EINVAL;
+			}
+
+			stm32_adc_chan_init_one(indio_dev, &channels[scan_index],
+						diff[i].vinp, diff[i].vinn,
+						scan_index, true);
+			scan_index++;
+		}
+	}
 
 	of_property_for_each_u32(node, "st,adc-channels", prop, cur, val) {
 		if (val >= adc_info->max_channels) {
@@ -1771,8 +1944,7 @@ static int stm32_adc_chan_of_init(struct iio_dev *indio_dev, bool timestamping)
 		/* Channel can't be configured both as single-ended & diff */
 		for (i = 0; i < num_diff; i++) {
 			if (val == diff[i].vinp) {
-				dev_err(&indio_dev->dev,
-					"channel %d miss-configured\n",	val);
+				dev_err(&indio_dev->dev, "channel %d misconfigured\n",	val);
 				return -EINVAL;
 			}
 		}
@@ -1781,19 +1953,6 @@ static int stm32_adc_chan_of_init(struct iio_dev *indio_dev, bool timestamping)
 		scan_index++;
 	}
 
-	for (i = 0; i < num_diff; i++) {
-		if (diff[i].vinp >= adc_info->max_channels ||
-		    diff[i].vinn >= adc_info->max_channels) {
-			dev_err(&indio_dev->dev, "Invalid channel in%d-in%d\n",
-				diff[i].vinp, diff[i].vinn);
-			return -EINVAL;
-		}
-		stm32_adc_chan_init_one(indio_dev, &channels[scan_index],
-					diff[i].vinp, diff[i].vinn, scan_index,
-					true);
-		scan_index++;
-	}
-
 	for (i = 0; i < scan_index; i++) {
 		/*
 		 * Using of_property_read_u32_index(), smp value will only be
@@ -1801,12 +1960,178 @@ static int stm32_adc_chan_of_init(struct iio_dev *indio_dev, bool timestamping)
 		 * get either no value, 1 shared value for all indexes, or one
 		 * value per channel.
 		 */
-		of_property_read_u32_index(node, "st,min-sample-time-nsecs",
-					   i, &smp);
+		of_property_read_u32_index(node, "st,min-sample-time-nsecs", i, &smp);
+
 		/* Prepare sampling time settings */
 		stm32_adc_smpr_init(adc, channels[i].channel, smp);
 	}
 
+	return scan_index;
+}
+
+static int stm32_adc_populate_int_ch(struct iio_dev *indio_dev, const char *ch_name,
+				     int chan)
+{
+	struct stm32_adc *adc = iio_priv(indio_dev);
+	u16 vrefint;
+	int i, ret;
+
+	for (i = 0; i < STM32_ADC_INT_CH_NB; i++) {
+		if (!strncmp(stm32_adc_ic[i].name, ch_name, STM32_ADC_CH_SZ)) {
+			adc->int_ch[i] = chan;
+
+			if (stm32_adc_ic[i].idx != STM32_ADC_INT_CH_VREFINT)
+				continue;
+
+			/* Get calibration data for vrefint channel */
+			ret = nvmem_cell_read_u16(&indio_dev->dev, "vrefint", &vrefint);
+			if (ret && ret != -ENOENT) {
+				return dev_err_probe(&indio_dev->dev, ret,
+						     "nvmem access error\n");
+			}
+			if (ret == -ENOENT)
+				dev_dbg(&indio_dev->dev, "vrefint calibration not found\n");
+			else
+				adc->vrefint.vrefint_cal = vrefint;
+		}
+	}
+
+	return 0;
+}
+
+static int stm32_adc_generic_chan_init(struct iio_dev *indio_dev,
+				       struct stm32_adc *adc,
+				       struct iio_chan_spec *channels)
+{
+	struct device_node *node = indio_dev->dev.of_node;
+	const struct stm32_adc_info *adc_info = adc->cfg->adc_info;
+	struct device_node *child;
+	const char *name;
+	int val, scan_index = 0, ret;
+	bool differential;
+	u32 vin[2];
+
+	for_each_available_child_of_node(node, child) {
+		ret = of_property_read_u32(child, "reg", &val);
+		if (ret) {
+			dev_err(&indio_dev->dev, "Missing channel index %d\n", ret);
+			goto err;
+		}
+
+		ret = of_property_read_string(child, "label", &name);
+		/* label is optional */
+		if (!ret) {
+			if (strlen(name) >= STM32_ADC_CH_SZ) {
+				dev_err(&indio_dev->dev, "Label %s exceeds %d characters\n",
+					name, STM32_ADC_CH_SZ);
+				return -EINVAL;
+			}
+			strncpy(adc->chan_name[val], name, STM32_ADC_CH_SZ);
+			ret = stm32_adc_populate_int_ch(indio_dev, name, val);
+			if (ret)
+				goto err;
+		} else if (ret != -EINVAL) {
+			dev_err(&indio_dev->dev, "Invalid label %d\n", ret);
+			goto err;
+		}
+
+		if (val >= adc_info->max_channels) {
+			dev_err(&indio_dev->dev, "Invalid channel %d\n", val);
+			ret = -EINVAL;
+			goto err;
+		}
+
+		differential = false;
+		ret = of_property_read_u32_array(child, "diff-channels", vin, 2);
+		/* diff-channels is optional */
+		if (!ret) {
+			differential = true;
+			if (vin[0] != val || vin[1] >= adc_info->max_channels) {
+				dev_err(&indio_dev->dev, "Invalid channel in%d-in%d\n",
+					vin[0], vin[1]);
+				goto err;
+			}
+		} else if (ret != -EINVAL) {
+			dev_err(&indio_dev->dev, "Invalid diff-channels property %d\n", ret);
+			goto err;
+		}
+
+		stm32_adc_chan_init_one(indio_dev, &channels[scan_index], val,
+					vin[1], scan_index, differential);
+
+		ret = of_property_read_u32(child, "st,min-sample-time-ns", &val);
+		/* st,min-sample-time-ns is optional */
+		if (!ret) {
+			stm32_adc_smpr_init(adc, channels[scan_index].channel, val);
+			if (differential)
+				stm32_adc_smpr_init(adc, vin[1], val);
+		} else if (ret != -EINVAL) {
+			dev_err(&indio_dev->dev, "Invalid st,min-sample-time-ns property %d\n",
+				ret);
+			goto err;
+		}
+
+		scan_index++;
+	}
+
+	return scan_index;
+
+err:
+	of_node_put(child);
+
+	return ret;
+}
+
+static int stm32_adc_chan_of_init(struct iio_dev *indio_dev, bool timestamping)
+{
+	struct device_node *node = indio_dev->dev.of_node;
+	struct stm32_adc *adc = iio_priv(indio_dev);
+	const struct stm32_adc_info *adc_info = adc->cfg->adc_info;
+	struct iio_chan_spec *channels;
+	int scan_index = 0, num_channels = 0, ret, i;
+	bool legacy = false;
+
+	for (i = 0; i < STM32_ADC_INT_CH_NB; i++)
+		adc->int_ch[i] = STM32_ADC_INT_CH_NONE;
+
+	num_channels = of_get_available_child_count(node);
+	/* If no channels have been found, fallback to channels legacy properties. */
+	if (!num_channels) {
+		legacy = true;
+
+		ret = stm32_adc_get_legacy_chan_count(indio_dev, adc);
+		if (!ret) {
+			dev_err(indio_dev->dev.parent, "No channel found\n");
+			return -ENODATA;
+		} else if (ret < 0) {
+			return ret;
+		}
+
+		num_channels = ret;
+	}
+
+	if (num_channels > adc_info->max_channels) {
+		dev_err(&indio_dev->dev, "Channel number [%d] exceeds %d\n",
+			num_channels, adc_info->max_channels);
+		return -EINVAL;
+	}
+
+	if (timestamping)
+		num_channels++;
+
+	channels = devm_kcalloc(&indio_dev->dev, num_channels,
+				sizeof(struct iio_chan_spec), GFP_KERNEL);
+	if (!channels)
+		return -ENOMEM;
+
+	if (legacy)
+		ret = stm32_adc_legacy_chan_init(indio_dev, adc, channels);
+	else
+		ret = stm32_adc_generic_chan_init(indio_dev, adc, channels);
+	if (ret < 0)
+		return ret;
+	scan_index = ret;
+
 	if (timestamping) {
 		struct iio_chan_spec *timestamp = &channels[scan_index];
 
@@ -2099,7 +2424,7 @@ static const struct stm32_adc_cfg stm32h7_adc_cfg = {
 };
 
 static const struct stm32_adc_cfg stm32mp1_adc_cfg = {
-	.regs = &stm32h7_adc_regspec,
+	.regs = &stm32mp1_adc_regspec,
 	.adc_info = &stm32h7_adc_info,
 	.trigs = stm32h7_adc_trigs,
 	.has_vregready = true,
@@ -2109,6 +2434,7 @@ static const struct stm32_adc_cfg stm32mp1_adc_cfg = {
 	.unprepare = stm32h7_adc_unprepare,
 	.smp_cycles = stm32h7_adc_smp_cycles,
 	.irq_clear = stm32h7_adc_irq_clear,
+	.ts_vrefint_ns = 4300,
 };
 
 static const struct of_device_id stm32_adc_of_match[] = {
diff --git a/drivers/iio/adc/ti-adc128s052.c b/drivers/iio/adc/ti-adc128s052.c
index 83c1ae07b3e9..8e7adec87755 100644
--- a/drivers/iio/adc/ti-adc128s052.c
+++ b/drivers/iio/adc/ti-adc128s052.c
@@ -132,6 +132,11 @@ static const struct iio_info adc128_info = {
 	.read_raw = adc128_read_raw,
 };
 
+static void adc128_disable_regulator(void *reg)
+{
+	regulator_disable(reg);
+}
+
 static int adc128_probe(struct spi_device *spi)
 {
 	struct iio_dev *indio_dev;
@@ -151,8 +156,6 @@ static int adc128_probe(struct spi_device *spi)
 	adc = iio_priv(indio_dev);
 	adc->spi = spi;
 
-	spi_set_drvdata(spi, indio_dev);
-
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &adc128_info;
@@ -167,29 +170,14 @@ static int adc128_probe(struct spi_device *spi)
 	ret = regulator_enable(adc->reg);
 	if (ret < 0)
 		return ret;
-
-	mutex_init(&adc->lock);
-
-	ret = iio_device_register(indio_dev);
+	ret = devm_add_action_or_reset(&spi->dev, adc128_disable_regulator,
+				       adc->reg);
 	if (ret)
-		goto err_disable_regulator;
-
-	return 0;
-
-err_disable_regulator:
-	regulator_disable(adc->reg);
-	return ret;
-}
-
-static int adc128_remove(struct spi_device *spi)
-{
-	struct iio_dev *indio_dev = spi_get_drvdata(spi);
-	struct adc128 *adc = iio_priv(indio_dev);
+		return ret;
 
-	iio_device_unregister(indio_dev);
-	regulator_disable(adc->reg);
+	mutex_init(&adc->lock);
 
-	return 0;
+	return devm_iio_device_register(&spi->dev, indio_dev);
 }
 
 static const struct of_device_id adc128_of_match[] = {
@@ -231,7 +219,6 @@ static struct spi_driver adc128_driver = {
 		.acpi_match_table = ACPI_PTR(adc128_acpi_match),
 	},
 	.probe = adc128_probe,
-	.remove = adc128_remove,
 	.id_table = adc128_id,
 };
 module_spi_driver(adc128_driver);
diff --git a/drivers/iio/adc/ti-ads7950.c b/drivers/iio/adc/ti-ads7950.c
index a2b83f0bd526..a7efa3eada2c 100644
--- a/drivers/iio/adc/ti-ads7950.c
+++ b/drivers/iio/adc/ti-ads7950.c
@@ -600,8 +600,8 @@ static int ti_ads7950_probe(struct spi_device *spi)
 
 	st->reg = devm_regulator_get(&spi->dev, "vref");
 	if (IS_ERR(st->reg)) {
-		dev_err(&spi->dev, "Failed to get regulator \"vref\"\n");
-		ret = PTR_ERR(st->reg);
+		ret = dev_err_probe(&spi->dev, PTR_ERR(st->reg),
+				     "Failed to get regulator \"vref\"\n");
 		goto error_destroy_mutex;
 	}
 
diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c
index 198d2916266d..83bea5ef765d 100644
--- a/drivers/iio/adc/xilinx-xadc-core.c
+++ b/drivers/iio/adc/xilinx-xadc-core.c
@@ -1332,7 +1332,6 @@ static int xadc_probe(struct platform_device *pdev)
 
 	xadc = iio_priv(indio_dev);
 	xadc->ops = id->data;
-	xadc->irq = irq;
 	init_completion(&xadc->completion);
 	mutex_init(&xadc->mutex);
 	spin_lock_init(&xadc->lock);
@@ -1397,7 +1396,7 @@ static int xadc_probe(struct platform_device *pdev)
 		}
 	}
 
-	ret = devm_request_irq(dev, xadc->irq, xadc->ops->interrupt_handler, 0,
+	ret = devm_request_irq(dev, irq, xadc->ops->interrupt_handler, 0,
 			       dev_name(dev), indio_dev);
 	if (ret)
 		return ret;
@@ -1407,7 +1406,7 @@ static int xadc_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	ret = xadc->ops->setup(pdev, indio_dev, xadc->irq);
+	ret = xadc->ops->setup(pdev, indio_dev, irq);
 	if (ret)
 		return ret;
 
diff --git a/drivers/iio/adc/xilinx-xadc.h b/drivers/iio/adc/xilinx-xadc.h
index 8b80195725e9..7d78ce698967 100644
--- a/drivers/iio/adc/xilinx-xadc.h
+++ b/drivers/iio/adc/xilinx-xadc.h
@@ -67,7 +67,6 @@ struct xadc {
 	spinlock_t lock;
 
 	struct completion completion;
-	int irq;
 };
 
 enum xadc_type {
diff --git a/drivers/iio/chemical/scd4x.c b/drivers/iio/chemical/scd4x.c
index ebebcb117ba2..267bc3c05338 100644
--- a/drivers/iio/chemical/scd4x.c
+++ b/drivers/iio/chemical/scd4x.c
@@ -353,7 +353,11 @@ static int scd4x_read_raw(struct iio_dev *indio_dev,
 		*val = ret;
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
-		if (chan->type == IIO_TEMP) {
+		if (chan->type == IIO_CONCENTRATION) {
+			*val = 0;
+			*val2 = 100;
+			return IIO_VAL_INT_PLUS_MICRO;
+		} else if (chan->type == IIO_TEMP) {
 			*val = 175000;
 			*val2 = 65536;
 			return IIO_VAL_FRACTIONAL;
@@ -503,7 +507,8 @@ static const struct iio_chan_spec scd4x_channels[] = {
 		.type = IIO_CONCENTRATION,
 		.channel2 = IIO_MOD_CO2,
 		.modified = 1,
-		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+					BIT(IIO_CHAN_INFO_SCALE),
 		.address = SCD4X_CO2,
 		.scan_index = SCD4X_CO2,
 		.scan_type = {
diff --git a/drivers/iio/frequency/Kconfig b/drivers/iio/frequency/Kconfig
index 240b81502512..2c9e0559e8a4 100644
--- a/drivers/iio/frequency/Kconfig
+++ b/drivers/iio/frequency/Kconfig
@@ -49,5 +49,17 @@ config ADF4371
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called adf4371.
+
+config ADRF6780
+        tristate "Analog Devices ADRF6780 Microwave Upconverter"
+        depends on SPI
+        depends on COMMON_CLK
+        help
+          Say yes here to build support for Analog Devices ADRF6780
+          5.9 GHz to 23.6 GHz, Wideband, Microwave Upconverter.
+
+          To compile this driver as a module, choose M here: the
+          module will be called adrf6780.
+
 endmenu
 endmenu
diff --git a/drivers/iio/frequency/Makefile b/drivers/iio/frequency/Makefile
index 518b1e50caef..ae3136c79202 100644
--- a/drivers/iio/frequency/Makefile
+++ b/drivers/iio/frequency/Makefile
@@ -7,3 +7,4 @@
 obj-$(CONFIG_AD9523) += ad9523.o
 obj-$(CONFIG_ADF4350) += adf4350.o
 obj-$(CONFIG_ADF4371) += adf4371.o
+obj-$(CONFIG_ADRF6780) += adrf6780.o
diff --git a/drivers/iio/frequency/adrf6780.c b/drivers/iio/frequency/adrf6780.c
new file mode 100644
index 000000000000..abe8b30fceca
--- /dev/null
+++ b/drivers/iio/frequency/adrf6780.c
@@ -0,0 +1,527 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ADRF6780 driver
+ *
+ * Copyright 2021 Analog Devices Inc.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/spi/spi.h>
+
+#include <asm/unaligned.h>
+
+/* ADRF6780 Register Map */
+#define ADRF6780_REG_CONTROL			0x00
+#define ADRF6780_REG_ALARM_READBACK		0x01
+#define ADRF6780_REG_ALARM_MASKS		0x02
+#define ADRF6780_REG_ENABLE			0x03
+#define ADRF6780_REG_LINEARIZE			0x04
+#define ADRF6780_REG_LO_PATH			0x05
+#define ADRF6780_REG_ADC_CONTROL		0x06
+#define ADRF6780_REG_ADC_OUTPUT			0x0C
+
+/* ADRF6780_REG_CONTROL Map */
+#define ADRF6780_PARITY_EN_MSK			BIT(15)
+#define ADRF6780_SOFT_RESET_MSK			BIT(14)
+#define ADRF6780_CHIP_ID_MSK			GENMASK(11, 4)
+#define ADRF6780_CHIP_ID			0xA
+#define ADRF6780_CHIP_REVISION_MSK		GENMASK(3, 0)
+
+/* ADRF6780_REG_ALARM_READBACK Map */
+#define ADRF6780_PARITY_ERROR_MSK		BIT(15)
+#define ADRF6780_TOO_FEW_ERRORS_MSK		BIT(14)
+#define ADRF6780_TOO_MANY_ERRORS_MSK		BIT(13)
+#define ADRF6780_ADDRESS_RANGE_ERROR_MSK	BIT(12)
+
+/* ADRF6780_REG_ENABLE Map */
+#define ADRF6780_VGA_BUFFER_EN_MSK		BIT(8)
+#define ADRF6780_DETECTOR_EN_MSK		BIT(7)
+#define ADRF6780_LO_BUFFER_EN_MSK		BIT(6)
+#define ADRF6780_IF_MODE_EN_MSK			BIT(5)
+#define ADRF6780_IQ_MODE_EN_MSK			BIT(4)
+#define ADRF6780_LO_X2_EN_MSK			BIT(3)
+#define ADRF6780_LO_PPF_EN_MSK			BIT(2)
+#define ADRF6780_LO_EN_MSK			BIT(1)
+#define ADRF6780_UC_BIAS_EN_MSK			BIT(0)
+
+/* ADRF6780_REG_LINEARIZE Map */
+#define ADRF6780_RDAC_LINEARIZE_MSK		GENMASK(7, 0)
+
+/* ADRF6780_REG_LO_PATH Map */
+#define ADRF6780_LO_SIDEBAND_MSK		BIT(10)
+#define ADRF6780_Q_PATH_PHASE_ACCURACY_MSK	GENMASK(7, 4)
+#define ADRF6780_I_PATH_PHASE_ACCURACY_MSK	GENMASK(3, 0)
+
+/* ADRF6780_REG_ADC_CONTROL Map */
+#define ADRF6780_VDET_OUTPUT_SELECT_MSK		BIT(3)
+#define ADRF6780_ADC_START_MSK			BIT(2)
+#define ADRF6780_ADC_EN_MSK			BIT(1)
+#define ADRF6780_ADC_CLOCK_EN_MSK		BIT(0)
+
+/* ADRF6780_REG_ADC_OUTPUT Map */
+#define ADRF6780_ADC_STATUS_MSK			BIT(8)
+#define ADRF6780_ADC_VALUE_MSK			GENMASK(7, 0)
+
+struct adrf6780_state {
+	struct spi_device	*spi;
+	struct clk		*clkin;
+	/* Protect against concurrent accesses to the device */
+	struct mutex		lock;
+	bool			vga_buff_en;
+	bool			lo_buff_en;
+	bool			if_mode_en;
+	bool			iq_mode_en;
+	bool			lo_x2_en;
+	bool			lo_ppf_en;
+	bool			lo_en;
+	bool			uc_bias_en;
+	bool			lo_sideband;
+	bool			vdet_out_en;
+	u8			data[3] ____cacheline_aligned;
+};
+
+static int __adrf6780_spi_read(struct adrf6780_state *st, unsigned int reg,
+			       unsigned int *val)
+{
+	int ret;
+	struct spi_transfer t = {0};
+
+	st->data[0] = 0x80 | (reg << 1);
+	st->data[1] = 0x0;
+	st->data[2] = 0x0;
+
+	t.rx_buf = &st->data[0];
+	t.tx_buf = &st->data[0];
+	t.len = 3;
+
+	ret = spi_sync_transfer(st->spi, &t, 1);
+	if (ret)
+		return ret;
+
+	*val = (get_unaligned_be24(&st->data[0]) >> 1) & GENMASK(15, 0);
+
+	return ret;
+}
+
+static int adrf6780_spi_read(struct adrf6780_state *st, unsigned int reg,
+			     unsigned int *val)
+{
+	int ret;
+
+	mutex_lock(&st->lock);
+	ret = adrf6780_spi_read(st, reg, val);
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
+static int __adrf6780_spi_write(struct adrf6780_state *st,
+				unsigned int reg,
+				unsigned int val)
+{
+	put_unaligned_be24((val << 1) | (reg << 17), &st->data[0]);
+
+	return spi_write(st->spi, &st->data[0], 3);
+}
+
+static int adrf6780_spi_write(struct adrf6780_state *st, unsigned int reg,
+			      unsigned int val)
+{
+	int ret;
+
+	mutex_lock(&st->lock);
+	ret = adrf6780_spi_write(st, reg, val);
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
+static int __adrf6780_spi_update_bits(struct adrf6780_state *st,
+				      unsigned int reg, unsigned int mask,
+				      unsigned int val)
+{
+	int ret;
+	unsigned int data, temp;
+
+	ret = __adrf6780_spi_read(st, reg, &data);
+	if (ret)
+		return ret;
+
+	temp = (data & ~mask) | (val & mask);
+
+	return __adrf6780_spi_write(st, reg, temp);
+}
+
+static int adrf6780_spi_update_bits(struct adrf6780_state *st, unsigned int reg,
+				    unsigned int mask, unsigned int val)
+{
+	int ret;
+
+	mutex_lock(&st->lock);
+	ret = __adrf6780_spi_update_bits(st, reg, mask, val);
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
+static int adrf6780_read_adc_raw(struct adrf6780_state *st, unsigned int *read_val)
+{
+	int ret;
+
+	mutex_lock(&st->lock);
+
+	ret = __adrf6780_spi_update_bits(st, ADRF6780_REG_ADC_CONTROL,
+					 ADRF6780_ADC_EN_MSK |
+					 ADRF6780_ADC_CLOCK_EN_MSK |
+					 ADRF6780_ADC_START_MSK,
+					 FIELD_PREP(ADRF6780_ADC_EN_MSK, 1) |
+					 FIELD_PREP(ADRF6780_ADC_CLOCK_EN_MSK, 1) |
+					 FIELD_PREP(ADRF6780_ADC_START_MSK, 1));
+	if (ret)
+		goto exit;
+
+	/* Recommended delay for the ADC to be ready*/
+	usleep_range(200, 250);
+
+	ret = __adrf6780_spi_read(st, ADRF6780_REG_ADC_OUTPUT, read_val);
+	if (ret)
+		goto exit;
+
+	if (!(*read_val & ADRF6780_ADC_STATUS_MSK)) {
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	ret = __adrf6780_spi_update_bits(st, ADRF6780_REG_ADC_CONTROL,
+					 ADRF6780_ADC_START_MSK,
+					 FIELD_PREP(ADRF6780_ADC_START_MSK, 0));
+	if (ret)
+		goto exit;
+
+	ret = __adrf6780_spi_read(st, ADRF6780_REG_ADC_OUTPUT, read_val);
+
+exit:
+	mutex_unlock(&st->lock);
+	return ret;
+}
+
+static int adrf6780_read_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int *val, int *val2, long info)
+{
+	struct adrf6780_state *dev = iio_priv(indio_dev);
+	unsigned int data;
+	int ret;
+
+	switch (info) {
+	case IIO_CHAN_INFO_RAW:
+		ret = adrf6780_read_adc_raw(dev, &data);
+		if (ret)
+			return ret;
+
+		*val = data & ADRF6780_ADC_VALUE_MSK;
+
+		return IIO_VAL_INT;
+
+	case IIO_CHAN_INFO_SCALE:
+		ret = adrf6780_spi_read(dev, ADRF6780_REG_LINEARIZE, &data);
+		if (ret)
+			return ret;
+
+		*val = data & ADRF6780_RDAC_LINEARIZE_MSK;
+
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_PHASE:
+		ret = adrf6780_spi_read(dev, ADRF6780_REG_LO_PATH, &data);
+		if (ret)
+			return ret;
+
+		switch (chan->channel2) {
+		case IIO_MOD_I:
+			*val = data & ADRF6780_I_PATH_PHASE_ACCURACY_MSK;
+
+			return IIO_VAL_INT;
+		case IIO_MOD_Q:
+			*val = FIELD_GET(ADRF6780_Q_PATH_PHASE_ACCURACY_MSK,
+					 data);
+
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int adrf6780_write_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan,
+			      int val, int val2, long info)
+{
+	struct adrf6780_state *st = iio_priv(indio_dev);
+
+	switch (info) {
+	case IIO_CHAN_INFO_SCALE:
+		return adrf6780_spi_write(st, ADRF6780_REG_LINEARIZE, val);
+	case IIO_CHAN_INFO_PHASE:
+		switch (chan->channel2) {
+		case IIO_MOD_I:
+			return adrf6780_spi_update_bits(st,
+				ADRF6780_REG_LO_PATH,
+				ADRF6780_I_PATH_PHASE_ACCURACY_MSK,
+				FIELD_PREP(ADRF6780_I_PATH_PHASE_ACCURACY_MSK, val));
+		case IIO_MOD_Q:
+			return adrf6780_spi_update_bits(st,
+				ADRF6780_REG_LO_PATH,
+				ADRF6780_Q_PATH_PHASE_ACCURACY_MSK,
+				FIELD_PREP(ADRF6780_Q_PATH_PHASE_ACCURACY_MSK, val));
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int adrf6780_reg_access(struct iio_dev *indio_dev,
+			       unsigned int reg,
+			       unsigned int write_val,
+			       unsigned int *read_val)
+{
+	struct adrf6780_state *st = iio_priv(indio_dev);
+
+	if (read_val)
+		return adrf6780_spi_read(st, reg, read_val);
+	else
+		return adrf6780_spi_write(st, reg, write_val);
+}
+
+static const struct iio_info adrf6780_info = {
+	.read_raw = adrf6780_read_raw,
+	.write_raw = adrf6780_write_raw,
+	.debugfs_reg_access = &adrf6780_reg_access,
+};
+
+#define ADRF6780_CHAN_ADC(_channel) {			\
+	.type = IIO_ALTVOLTAGE,				\
+	.output = 0,					\
+	.indexed = 1,					\
+	.channel = _channel,				\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW)	\
+}
+
+#define ADRF6780_CHAN_RDAC(_channel) {			\
+	.type = IIO_ALTVOLTAGE,				\
+	.output = 1,					\
+	.indexed = 1,					\
+	.channel = _channel,				\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_SCALE)	\
+}
+
+#define ADRF6780_CHAN_IQ_PHASE(_channel, rf_comp) {		\
+	.type = IIO_ALTVOLTAGE,					\
+	.modified = 1,						\
+	.output = 1,						\
+	.indexed = 1,						\
+	.channel2 = IIO_MOD_##rf_comp,				\
+	.channel = _channel,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_PHASE)		\
+}
+
+static const struct iio_chan_spec adrf6780_channels[] = {
+	ADRF6780_CHAN_ADC(0),
+	ADRF6780_CHAN_RDAC(0),
+	ADRF6780_CHAN_IQ_PHASE(0, I),
+	ADRF6780_CHAN_IQ_PHASE(0, Q),
+};
+
+static int adrf6780_reset(struct adrf6780_state *st)
+{
+	int ret;
+	struct spi_device *spi = st->spi;
+
+	ret = __adrf6780_spi_update_bits(st, ADRF6780_REG_CONTROL,
+					 ADRF6780_SOFT_RESET_MSK,
+					 FIELD_PREP(ADRF6780_SOFT_RESET_MSK, 1));
+	if (ret) {
+		dev_err(&spi->dev, "ADRF6780 SPI software reset failed.\n");
+		return ret;
+	}
+
+	ret = __adrf6780_spi_update_bits(st, ADRF6780_REG_CONTROL,
+					 ADRF6780_SOFT_RESET_MSK,
+					 FIELD_PREP(ADRF6780_SOFT_RESET_MSK, 0));
+	if (ret) {
+		dev_err(&spi->dev, "ADRF6780 SPI software reset disable failed.\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int adrf6780_init(struct adrf6780_state *st)
+{
+	int ret;
+	unsigned int chip_id, enable_reg, enable_reg_msk;
+	struct spi_device *spi = st->spi;
+
+	/* Perform a software reset */
+	ret = adrf6780_reset(st);
+	if (ret)
+		return ret;
+
+	ret = __adrf6780_spi_read(st, ADRF6780_REG_CONTROL, &chip_id);
+	if (ret)
+		return ret;
+
+	chip_id = FIELD_GET(ADRF6780_CHIP_ID_MSK, chip_id);
+	if (chip_id != ADRF6780_CHIP_ID) {
+		dev_err(&spi->dev, "ADRF6780 Invalid Chip ID.\n");
+		return -EINVAL;
+	}
+
+	enable_reg_msk = ADRF6780_VGA_BUFFER_EN_MSK |
+			ADRF6780_DETECTOR_EN_MSK |
+			ADRF6780_LO_BUFFER_EN_MSK |
+			ADRF6780_IF_MODE_EN_MSK |
+			ADRF6780_IQ_MODE_EN_MSK |
+			ADRF6780_LO_X2_EN_MSK |
+			ADRF6780_LO_PPF_EN_MSK |
+			ADRF6780_LO_EN_MSK |
+			ADRF6780_UC_BIAS_EN_MSK;
+
+	enable_reg = FIELD_PREP(ADRF6780_VGA_BUFFER_EN_MSK, st->vga_buff_en) |
+			FIELD_PREP(ADRF6780_DETECTOR_EN_MSK, 1) |
+			FIELD_PREP(ADRF6780_LO_BUFFER_EN_MSK, st->lo_buff_en) |
+			FIELD_PREP(ADRF6780_IF_MODE_EN_MSK, st->if_mode_en) |
+			FIELD_PREP(ADRF6780_IQ_MODE_EN_MSK, st->iq_mode_en) |
+			FIELD_PREP(ADRF6780_LO_X2_EN_MSK, st->lo_x2_en) |
+			FIELD_PREP(ADRF6780_LO_PPF_EN_MSK, st->lo_ppf_en) |
+			FIELD_PREP(ADRF6780_LO_EN_MSK, st->lo_en) |
+			FIELD_PREP(ADRF6780_UC_BIAS_EN_MSK, st->uc_bias_en);
+
+	ret = __adrf6780_spi_update_bits(st, ADRF6780_REG_ENABLE,
+					 enable_reg_msk, enable_reg);
+	if (ret)
+		return ret;
+
+	ret = __adrf6780_spi_update_bits(st, ADRF6780_REG_LO_PATH,
+					 ADRF6780_LO_SIDEBAND_MSK,
+					 FIELD_PREP(ADRF6780_LO_SIDEBAND_MSK, st->lo_sideband));
+	if (ret)
+		return ret;
+
+	return __adrf6780_spi_update_bits(st, ADRF6780_REG_ADC_CONTROL,
+		ADRF6780_VDET_OUTPUT_SELECT_MSK,
+		FIELD_PREP(ADRF6780_VDET_OUTPUT_SELECT_MSK, st->vdet_out_en));
+}
+
+static void adrf6780_properties_parse(struct adrf6780_state *st)
+{
+	struct spi_device *spi = st->spi;
+
+	st->vga_buff_en = device_property_read_bool(&spi->dev, "adi,vga-buff-en");
+	st->lo_buff_en = device_property_read_bool(&spi->dev, "adi,lo-buff-en");
+	st->if_mode_en = device_property_read_bool(&spi->dev, "adi,if-mode-en");
+	st->iq_mode_en = device_property_read_bool(&spi->dev, "adi,iq-mode-en");
+	st->lo_x2_en = device_property_read_bool(&spi->dev, "adi,lo-x2-en");
+	st->lo_ppf_en = device_property_read_bool(&spi->dev, "adi,lo-ppf-en");
+	st->lo_en = device_property_read_bool(&spi->dev, "adi,lo-en");
+	st->uc_bias_en = device_property_read_bool(&spi->dev, "adi,uc-bias-en");
+	st->lo_sideband = device_property_read_bool(&spi->dev, "adi,lo-sideband");
+	st->vdet_out_en = device_property_read_bool(&spi->dev, "adi,vdet-out-en");
+}
+
+static void adrf6780_clk_disable(void *data)
+{
+	clk_disable_unprepare(data);
+}
+
+static void adrf6780_powerdown(void *data)
+{
+	/* Disable all components in the Enable Register */
+	adrf6780_spi_write(data, ADRF6780_REG_ENABLE, 0x0);
+}
+
+static int adrf6780_probe(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev;
+	struct adrf6780_state *st;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	st = iio_priv(indio_dev);
+
+	indio_dev->info = &adrf6780_info;
+	indio_dev->name = "adrf6780";
+	indio_dev->channels = adrf6780_channels;
+	indio_dev->num_channels = ARRAY_SIZE(adrf6780_channels);
+
+	st->spi = spi;
+
+	adrf6780_properties_parse(st);
+
+	st->clkin = devm_clk_get(&spi->dev, "lo_in");
+	if (IS_ERR(st->clkin))
+		return dev_err_probe(&spi->dev, PTR_ERR(st->clkin),
+				     "failed to get the LO input clock\n");
+
+	ret = clk_prepare_enable(st->clkin);
+	if (ret)
+		return ret;
+
+	ret = devm_add_action_or_reset(&spi->dev, adrf6780_clk_disable,
+				       st->clkin);
+	if (ret)
+		return ret;
+
+	mutex_init(&st->lock);
+
+	ret = adrf6780_init(st);
+	if (ret)
+		return ret;
+
+	ret = devm_add_action_or_reset(&spi->dev, adrf6780_powerdown, st);
+	if (ret)
+		return ret;
+
+	return devm_iio_device_register(&spi->dev, indio_dev);
+}
+
+static const struct spi_device_id adrf6780_id[] = {
+	{ "adrf6780", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(spi, adrf6780_id);
+
+static const struct of_device_id adrf6780_of_match[] = {
+	{ .compatible = "adi,adrf6780" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, adrf6780_of_match);
+
+static struct spi_driver adrf6780_driver = {
+	.driver = {
+		.name = "adrf6780",
+		.of_match_table = adrf6780_of_match,
+	},
+	.probe = adrf6780_probe,
+	.id_table = adrf6780_id,
+};
+module_spi_driver(adrf6780_driver);
+
+MODULE_AUTHOR("Antoniu Miclaus <antoniu.miclaus@analog.com");
+MODULE_DESCRIPTION("Analog Devices ADRF6780");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
index 0f54df85134a..f2cbbc756459 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
@@ -1281,6 +1281,8 @@ st_lsm6dsx_set_odr(struct st_lsm6dsx_sensor *sensor, u32 req_odr)
 	int err;
 
 	switch (sensor->id) {
+	case ST_LSM6DSX_ID_GYRO:
+		break;
 	case ST_LSM6DSX_ID_EXT0:
 	case ST_LSM6DSX_ID_EXT1:
 	case ST_LSM6DSX_ID_EXT2:
@@ -1306,8 +1308,8 @@ st_lsm6dsx_set_odr(struct st_lsm6dsx_sensor *sensor, u32 req_odr)
 		}
 		break;
 	}
-	default:
-		break;
+	default: /* should never occur */
+		return -EINVAL;
 	}
 
 	if (req_odr > 0) {
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index 7932e86cd8e9..e180728914c0 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -179,7 +179,7 @@ static ssize_t iio_buffer_write(struct file *filp, const char __user *buf,
 	struct iio_buffer *rb = ib->buffer;
 	struct iio_dev *indio_dev = ib->indio_dev;
 	DEFINE_WAIT_FUNC(wait, woken_wake_function);
-	int ret;
+	int ret = 0;
 	size_t written;
 
 	if (!indio_dev->info)
diff --git a/drivers/iio/light/cm3605.c b/drivers/iio/light/cm3605.c
index 4c83953672be..3e7fb16ab1f6 100644
--- a/drivers/iio/light/cm3605.c
+++ b/drivers/iio/light/cm3605.c
@@ -159,6 +159,7 @@ static int cm3605_probe(struct platform_device *pdev)
 	struct device_node *np = dev->of_node;
 	enum iio_chan_type ch_type;
 	u32 rset;
+	int irq;
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*cm3605));
@@ -195,12 +196,9 @@ static int cm3605_probe(struct platform_device *pdev)
 
 	cm3605->aout = devm_iio_channel_get(dev, "aout");
 	if (IS_ERR(cm3605->aout)) {
-		if (PTR_ERR(cm3605->aout) == -ENODEV) {
-			dev_err(dev, "no ADC, deferring...\n");
-			return -EPROBE_DEFER;
-		}
-		dev_err(dev, "failed to get AOUT ADC channel\n");
-		return PTR_ERR(cm3605->aout);
+		ret = PTR_ERR(cm3605->aout);
+		ret = (ret == -ENODEV) ? -EPROBE_DEFER : ret;
+		return dev_err_probe(dev, ret, "failed to get AOUT ADC channel\n");
 	}
 	ret = iio_get_channel_type(cm3605->aout, &ch_type);
 	if (ret < 0)
@@ -211,10 +209,10 @@ static int cm3605_probe(struct platform_device *pdev)
 	}
 
 	cm3605->vdd = devm_regulator_get(dev, "vdd");
-	if (IS_ERR(cm3605->vdd)) {
-		dev_err(dev, "failed to get VDD regulator\n");
-		return PTR_ERR(cm3605->vdd);
-	}
+	if (IS_ERR(cm3605->vdd))
+		return dev_err_probe(dev, PTR_ERR(cm3605->vdd),
+				     "failed to get VDD regulator\n");
+
 	ret = regulator_enable(cm3605->vdd);
 	if (ret) {
 		dev_err(dev, "failed to enable VDD regulator\n");
@@ -223,13 +221,16 @@ static int cm3605_probe(struct platform_device *pdev)
 
 	cm3605->aset = devm_gpiod_get(dev, "aset", GPIOD_OUT_HIGH);
 	if (IS_ERR(cm3605->aset)) {
-		dev_err(dev, "no ASET GPIO\n");
-		ret = PTR_ERR(cm3605->aset);
+		ret = dev_err_probe(dev, PTR_ERR(cm3605->aset), "no ASET GPIO\n");
 		goto out_disable_vdd;
 	}
 
-	ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0),
-			cm3605_prox_irq, NULL, 0, "cm3605", indio_dev);
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return dev_err_probe(dev, irq, "failed to get irq\n");
+
+	ret = devm_request_threaded_irq(dev, irq, cm3605_prox_irq,
+					NULL, 0, "cm3605", indio_dev);
 	if (ret) {
 		dev_err(dev, "unable to request IRQ\n");
 		goto out_disable_aset;
diff --git a/drivers/iio/light/gp2ap002.c b/drivers/iio/light/gp2ap002.c
index f960be7d4001..c6d1d88d3775 100644
--- a/drivers/iio/light/gp2ap002.c
+++ b/drivers/iio/light/gp2ap002.c
@@ -503,12 +503,9 @@ static int gp2ap002_probe(struct i2c_client *client,
 	if (!gp2ap002->is_gp2ap002s00f) {
 		gp2ap002->alsout = devm_iio_channel_get(dev, "alsout");
 		if (IS_ERR(gp2ap002->alsout)) {
-			if (PTR_ERR(gp2ap002->alsout) == -ENODEV) {
-				dev_err(dev, "no ADC, deferring...\n");
-				return -EPROBE_DEFER;
-			}
-			dev_err(dev, "failed to get ALSOUT ADC channel\n");
-			return PTR_ERR(gp2ap002->alsout);
+			ret = PTR_ERR(gp2ap002->alsout);
+			ret = (ret == -ENODEV) ? -EPROBE_DEFER : ret;
+			return dev_err_probe(dev, ret, "failed to get ALSOUT ADC channel\n");
 		}
 		ret = iio_get_channel_type(gp2ap002->alsout, &ch_type);
 		if (ret < 0)
@@ -521,15 +518,14 @@ static int gp2ap002_probe(struct i2c_client *client,
 	}
 
 	gp2ap002->vdd = devm_regulator_get(dev, "vdd");
-	if (IS_ERR(gp2ap002->vdd)) {
-		dev_err(dev, "failed to get VDD regulator\n");
-		return PTR_ERR(gp2ap002->vdd);
-	}
+	if (IS_ERR(gp2ap002->vdd))
+		return dev_err_probe(dev, PTR_ERR(gp2ap002->vdd),
+				     "failed to get VDD regulator\n");
+
 	gp2ap002->vio = devm_regulator_get(dev, "vio");
-	if (IS_ERR(gp2ap002->vio)) {
-		dev_err(dev, "failed to get VIO regulator\n");
-		return PTR_ERR(gp2ap002->vio);
-	}
+	if (IS_ERR(gp2ap002->vio))
+		return dev_err_probe(dev, PTR_ERR(gp2ap002->vio),
+				     "failed to get VIO regulator\n");
 
 	/* Operating voltage 2.4V .. 3.6V according to datasheet */
 	ret = regulator_set_voltage(gp2ap002->vdd, 2400000, 3600000);
diff --git a/drivers/iio/light/ltr501.c b/drivers/iio/light/ltr501.c
index 1830221da48d..7e51aaac0bf8 100644
--- a/drivers/iio/light/ltr501.c
+++ b/drivers/iio/light/ltr501.c
@@ -15,6 +15,7 @@
 #include <linux/delay.h>
 #include <linux/regmap.h>
 #include <linux/acpi.h>
+#include <linux/regulator/consumer.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/events.h>
@@ -151,6 +152,7 @@ struct ltr501_chip_info {
 
 struct ltr501_data {
 	struct i2c_client *client;
+	struct regulator_bulk_data regulators[2];
 	struct mutex lock_als, lock_ps;
 	const struct ltr501_chip_info *chip_info;
 	u8 als_contr, ps_contr;
@@ -1379,6 +1381,13 @@ static const struct regmap_config ltr501_regmap_config = {
 	.volatile_reg = ltr501_is_volatile_reg,
 };
 
+static void ltr501_disable_regulators(void *d)
+{
+	struct ltr501_data *data = d;
+
+	regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);
+}
+
 static int ltr501_powerdown(struct ltr501_data *data)
 {
 	return ltr501_write_contr(data, data->als_contr &
@@ -1423,6 +1432,25 @@ static int ltr501_probe(struct i2c_client *client,
 	mutex_init(&data->lock_als);
 	mutex_init(&data->lock_ps);
 
+	data->regulators[0].supply = "vdd";
+	data->regulators[1].supply = "vddio";
+	ret = devm_regulator_bulk_get(&client->dev,
+				      ARRAY_SIZE(data->regulators),
+				      data->regulators);
+	if (ret)
+		return dev_err_probe(&client->dev, ret,
+				     "Failed to get regulators\n");
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(data->regulators),
+				    data->regulators);
+	if (ret)
+		return ret;
+
+	ret = devm_add_action_or_reset(&client->dev,
+				       ltr501_disable_regulators, data);
+	if (ret)
+		return ret;
+
 	data->reg_it = devm_regmap_field_alloc(&client->dev, regmap,
 					       reg_field_it);
 	if (IS_ERR(data->reg_it)) {
@@ -1581,9 +1609,18 @@ static const struct i2c_device_id ltr501_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, ltr501_id);
 
+static const struct of_device_id ltr501_of_match[] = {
+	{ .compatible = "liteon,ltr501", },
+	{ .compatible = "liteon,ltr559", },
+	{ .compatible = "liteon,ltr301", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, ltr501_of_match);
+
 static struct i2c_driver ltr501_driver = {
 	.driver = {
 		.name   = LTR501_DRV_NAME,
+		.of_match_table = ltr501_of_match,
 		.pm	= &ltr501_pm_ops,
 		.acpi_match_table = ACPI_PTR(ltr_acpi_match),
 	},
diff --git a/drivers/iio/multiplexer/iio-mux.c b/drivers/iio/multiplexer/iio-mux.c
index d54ae5cbe51b..f422d44377df 100644
--- a/drivers/iio/multiplexer/iio-mux.c
+++ b/drivers/iio/multiplexer/iio-mux.c
@@ -33,6 +33,7 @@ struct mux {
 	struct iio_chan_spec *chan;
 	struct iio_chan_spec_ext_info *ext_info;
 	struct mux_child *child;
+	u32 delay_us;
 };
 
 static int iio_mux_select(struct mux *mux, int idx)
@@ -42,7 +43,8 @@ static int iio_mux_select(struct mux *mux, int idx)
 	int ret;
 	int i;
 
-	ret = mux_control_select(mux->control, chan->channel);
+	ret = mux_control_select_delay(mux->control, chan->channel,
+				       mux->delay_us);
 	if (ret < 0) {
 		mux->cached_state = -1;
 		return ret;
@@ -392,6 +394,9 @@ static int mux_probe(struct platform_device *pdev)
 	mux->parent = parent;
 	mux->cached_state = -1;
 
+	mux->delay_us = 0;
+	of_property_read_u32(np, "settle-time-us", &mux->delay_us);
+
 	indio_dev->name = dev_name(dev);
 	indio_dev->info = &mux_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;