iio: adc: stm32-dfsdm-adc: make use of regmap_clear_bits(), regmap_set_bits()

Instead of using regmap_update_bits() and passing the mask twice, use
regmap_set_bits().

Instead of using regmap_update_bits() and passing val = 0, use
regmap_clear_bits().
Suggested-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://patch.msgid.link/20240617-review-v3-18-88d1338c4cca@baylibre.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/stm32-dfsdm-adc.c

@@ -759,8 +759,7 @@ static int stm32_dfsdm_start_conv(struct iio_dev *indio_dev,
 	return 0;
 
 filter_unconfigure:
-	regmap_update_bits(regmap, DFSDM_CR1(adc->fl_id),
-			   DFSDM_CR1_CFG_MASK, 0);
+	regmap_clear_bits(regmap, DFSDM_CR1(adc->fl_id), DFSDM_CR1_CFG_MASK);
 stop_channels:
 	stm32_dfsdm_stop_channel(indio_dev);
 
@@ -774,8 +773,7 @@ static void stm32_dfsdm_stop_conv(struct iio_dev *indio_dev)
 
 	stm32_dfsdm_stop_filter(adc->dfsdm, adc->fl_id);
 
-	regmap_update_bits(regmap, DFSDM_CR1(adc->fl_id),
-			   DFSDM_CR1_CFG_MASK, 0);
+	regmap_clear_bits(regmap, DFSDM_CR1(adc->fl_id), DFSDM_CR1_CFG_MASK);
 
 	stm32_dfsdm_stop_channel(indio_dev);
 }
@@ -951,15 +949,13 @@ static int stm32_dfsdm_adc_dma_start(struct iio_dev *indio_dev)
 
 	if (adc->nconv == 1 && !indio_dev->trig) {
 		/* Enable regular DMA transfer*/
-		ret = regmap_update_bits(adc->dfsdm->regmap,
+		ret = regmap_set_bits(adc->dfsdm->regmap,
 				      DFSDM_CR1(adc->fl_id),
-					 DFSDM_CR1_RDMAEN_MASK,
 				      DFSDM_CR1_RDMAEN_MASK);
 	} else {
 		/* Enable injected DMA transfer*/
-		ret = regmap_update_bits(adc->dfsdm->regmap,
+		ret = regmap_set_bits(adc->dfsdm->regmap,
 				      DFSDM_CR1(adc->fl_id),
-					 DFSDM_CR1_JDMAEN_MASK,
 				      DFSDM_CR1_JDMAEN_MASK);
 	}
 
@@ -981,8 +977,8 @@ static void stm32_dfsdm_adc_dma_stop(struct iio_dev *indio_dev)
 	if (!adc->dma_chan)
 		return;
 
-	regmap_update_bits(adc->dfsdm->regmap, DFSDM_CR1(adc->fl_id),
-			   DFSDM_CR1_RDMAEN_MASK | DFSDM_CR1_JDMAEN_MASK, 0);
+	regmap_clear_bits(adc->dfsdm->regmap, DFSDM_CR1(adc->fl_id),
+			  DFSDM_CR1_RDMAEN_MASK | DFSDM_CR1_JDMAEN_MASK);
 	dmaengine_terminate_all(adc->dma_chan);
 }
 
@@ -1305,8 +1301,7 @@ static irqreturn_t stm32_dfsdm_irq(int irq, void *arg)
 	if (status & DFSDM_ISR_ROVRF_MASK) {
 		if (int_en & DFSDM_CR2_ROVRIE_MASK)
 			dev_warn(&indio_dev->dev, "Overrun detected\n");
-		regmap_update_bits(regmap, DFSDM_ICR(adc->fl_id),
-				   DFSDM_ICR_CLRROVRF_MASK,
+		regmap_set_bits(regmap, DFSDM_ICR(adc->fl_id),
 				DFSDM_ICR_CLRROVRF_MASK);
 	}