iio: adc: Switch to sparse friendly iio_device_claim/release_direct()

Single patch for all the relatively simple cases.

These new functions allow sparse to find failures to release
direct mode reducing chances of bugs over the claim_direct_mode()
functions that are deprecated.

Cc: Olivier Moysan <olivier.moysan@foss.st.com>
Cc: Phil Reid <preid@electromag.com.au>
Reviewed-by: Mike Looijmans <mike.looijmans@topic.nl>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://patch.msgid.link/20250217141630.897334-30-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

15 files changed, 71 insertions, 94 deletions

diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c
index 54f9cc5a89f5..ca2b41b16cc9 100644
--- a/drivers/iio/adc/ad7173.c
+++ b/drivers/iio/adc/ad7173.c
@@ -1157,11 +1157,10 @@ static int ad7173_write_raw(struct iio_dev *indio_dev,
 	struct ad7173_state *st = iio_priv(indio_dev);
 	struct ad7173_channel_config *cfg;
 	unsigned int freq, i;
-	int ret;
+	int ret = 0;
 
-	ret = iio_device_claim_direct_mode(indio_dev);
-	if (ret)
-		return ret;
+	if (!iio_device_claim_direct(indio_dev))
+		return -EBUSY;
 
 	switch (info) {
 	/*
@@ -1195,7 +1194,7 @@ static int ad7173_write_raw(struct iio_dev *indio_dev,
 		break;
 	}
 
-	iio_device_release_direct_mode(indio_dev);
+	iio_device_release_direct(indio_dev);
 	return ret;
 }
 
diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c
index 858c8be2ff1a..18559757f908 100644
--- a/drivers/iio/adc/ad7266.c
+++ b/drivers/iio/adc/ad7266.c
@@ -153,11 +153,10 @@ static int ad7266_read_raw(struct iio_dev *indio_dev,
 
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 		ret = ad7266_read_single(st, val, chan->address);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 
 		if (ret < 0)
 			return ret;
diff --git a/drivers/iio/adc/ad7298.c b/drivers/iio/adc/ad7298.c
index b35bd4d9ef81..28b88092b4aa 100644
--- a/drivers/iio/adc/ad7298.c
+++ b/drivers/iio/adc/ad7298.c
@@ -232,16 +232,15 @@ static int ad7298_read_raw(struct iio_dev *indio_dev,
 
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		if (chan->address == AD7298_CH_TEMP)
 			ret = ad7298_scan_temp(st, val);
 		else
 			ret = ad7298_scan_direct(st, chan->address);
 
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 
 		if (ret < 0)
 			return ret;
diff --git a/drivers/iio/adc/ad7380.c b/drivers/iio/adc/ad7380.c
index a18dcd664c1b..f232ad1a4963 100644
--- a/drivers/iio/adc/ad7380.c
+++ b/drivers/iio/adc/ad7380.c
@@ -716,16 +716,15 @@ static int ad7380_debugfs_reg_access(struct iio_dev *indio_dev, u32 reg,
 	struct ad7380_state *st = iio_priv(indio_dev);
 	int ret;
 
-	ret = iio_device_claim_direct_mode(indio_dev);
-	if (ret)
-		return ret;
+	if (!iio_device_claim_direct(indio_dev))
+		return -EBUSY;
 
 	if (readval)
 		ret = regmap_read(st->regmap, reg, readval);
 	else
 		ret = regmap_write(st->regmap, reg, writeval);
 
-	iio_device_release_direct_mode(indio_dev);
+	iio_device_release_direct(indio_dev);
 
 	return ret;
 }
@@ -1018,14 +1017,13 @@ static int ad7380_read_raw(struct iio_dev *indio_dev,
 
 	switch (info) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = ad7380_read_direct(st, chan->scan_index,
 					 scan_type, val);
 
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 
 		return ret;
 	case IIO_CHAN_INFO_SCALE:
@@ -1056,13 +1054,12 @@ static int ad7380_read_raw(struct iio_dev *indio_dev,
 
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = ad7380_get_osr(st, val);
 
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 
 		if (ret)
 			return ret;
@@ -1155,13 +1152,12 @@ static int ad7380_write_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = ad7380_set_oversampling_ratio(st, val);
 
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 
 		return ret;
 	default:
@@ -1186,13 +1182,12 @@ static int ad7380_read_event_config(struct iio_dev *indio_dev,
 	struct ad7380_state *st = iio_priv(indio_dev);
 	int tmp, ret;
 
-	ret = iio_device_claim_direct_mode(indio_dev);
-	if (ret)
-		return ret;
+	if (!iio_device_claim_direct(indio_dev))
+		return -EBUSY;
 
 	ret = regmap_read(st->regmap, AD7380_REG_ADDR_CONFIG1, &tmp);
 
-	iio_device_release_direct_mode(indio_dev);
+	iio_device_release_direct(indio_dev);
 
 	if (ret)
 		return ret;
@@ -1209,16 +1204,15 @@ static int ad7380_write_event_config(struct iio_dev *indio_dev,
 	struct ad7380_state *st = iio_priv(indio_dev);
 	int ret;
 
-	ret = iio_device_claim_direct_mode(indio_dev);
-	if (ret)
-		return ret;
+	if (!iio_device_claim_direct(indio_dev))
+		return -EBUSY;
 
 	ret = regmap_update_bits(st->regmap,
 				 AD7380_REG_ADDR_CONFIG1,
 				 AD7380_CONFIG1_ALERTEN,
 				 FIELD_PREP(AD7380_CONFIG1_ALERTEN, state));
 
-	iio_device_release_direct_mode(indio_dev);
+	iio_device_release_direct(indio_dev);
 
 	return ret;
 }
@@ -1265,13 +1259,12 @@ static int ad7380_read_event_value(struct iio_dev *indio_dev,
 
 	switch (info) {
 	case IIO_EV_INFO_VALUE:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = ad7380_get_alert_th(st, dir, val);
 
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		return ret;
 	default:
 		return -EINVAL;
@@ -1332,13 +1325,12 @@ static int ad7380_write_event_value(struct iio_dev *indio_dev,
 
 	switch (info) {
 	case IIO_EV_INFO_VALUE:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = ad7380_set_alert_th(indio_dev, chan, dir, val);
 
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		return ret;
 	default:
 		return -EINVAL;
diff --git a/drivers/iio/adc/ad7476.c b/drivers/iio/adc/ad7476.c
index aeb8e383fe71..37b0515cf4fc 100644
--- a/drivers/iio/adc/ad7476.c
+++ b/drivers/iio/adc/ad7476.c
@@ -138,11 +138,10 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
 
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 		ret = ad7476_scan_direct(st);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 
 		if (ret < 0)
 			return ret;
diff --git a/drivers/iio/adc/ad7887.c b/drivers/iio/adc/ad7887.c
index 69add1dc4b53..87ff95643794 100644
--- a/drivers/iio/adc/ad7887.c
+++ b/drivers/iio/adc/ad7887.c
@@ -152,11 +152,10 @@ static int ad7887_read_raw(struct iio_dev *indio_dev,
 
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 		ret = ad7887_scan_direct(st, chan->address);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 
 		if (ret < 0)
 			return ret;
diff --git a/drivers/iio/adc/ad7923.c b/drivers/iio/adc/ad7923.c
index acc44cb34f82..87945efb940b 100644
--- a/drivers/iio/adc/ad7923.c
+++ b/drivers/iio/adc/ad7923.c
@@ -260,11 +260,10 @@ static int ad7923_read_raw(struct iio_dev *indio_dev,
 
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 		ret = ad7923_scan_direct(st, chan->address);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 
 		if (ret < 0)
 			return ret;
diff --git a/drivers/iio/adc/ad7944.c b/drivers/iio/adc/ad7944.c
index 9a7825ea5087..2f949fe55873 100644
--- a/drivers/iio/adc/ad7944.c
+++ b/drivers/iio/adc/ad7944.c
@@ -407,12 +407,11 @@ static int ad7944_read_raw(struct iio_dev *indio_dev,
 
 	switch (info) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = ad7944_single_conversion(adc, chan, val);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		return ret;
 
 	case IIO_CHAN_INFO_SCALE:
diff --git a/drivers/iio/adc/dln2-adc.c b/drivers/iio/adc/dln2-adc.c
index 221a5fdc1eaa..a1e48a756a7b 100644
--- a/drivers/iio/adc/dln2-adc.c
+++ b/drivers/iio/adc/dln2-adc.c
@@ -314,15 +314,14 @@ static int dln2_adc_read_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret < 0)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		mutex_lock(&dln2->mutex);
 		ret = dln2_adc_read(dln2, chan->channel);
 		mutex_unlock(&dln2->mutex);
 
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 
 		if (ret < 0)
 			return ret;
diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
index 9d3b23efcc06..5dbf5f136768 100644
--- a/drivers/iio/adc/stm32-adc.c
+++ b/drivers/iio/adc/stm32-adc.c
@@ -1471,9 +1471,8 @@ 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;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 		if (chan->type == IIO_VOLTAGE)
 			ret = stm32_adc_single_conv(indio_dev, chan, val);
 		else
@@ -1482,7 +1481,7 @@ static int stm32_adc_read_raw(struct iio_dev *indio_dev,
 		if (mask == IIO_CHAN_INFO_PROCESSED)
 			*val = STM32_ADC_VREFINT_VOLTAGE * adc->vrefint.vrefint_cal / *val;
 
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		return ret;
 
 	case IIO_CHAN_INFO_SCALE:
diff --git a/drivers/iio/adc/ti-adc084s021.c b/drivers/iio/adc/ti-adc084s021.c
index da16876c32ae..9c845ee01697 100644
--- a/drivers/iio/adc/ti-adc084s021.c
+++ b/drivers/iio/adc/ti-adc084s021.c
@@ -96,19 +96,18 @@ static int adc084s021_read_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret < 0)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = regulator_enable(adc->reg);
 		if (ret) {
-			iio_device_release_direct_mode(indio_dev);
+			iio_device_release_direct(indio_dev);
 			return ret;
 		}
 
 		adc->tx_buf[0] = channel->channel << 3;
 		ret = adc084s021_adc_conversion(adc, &be_val);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		regulator_disable(adc->reg);
 		if (ret < 0)
 			return ret;
diff --git a/drivers/iio/adc/ti-adc108s102.c b/drivers/iio/adc/ti-adc108s102.c
index 9758ac801310..7d615e2bbf39 100644
--- a/drivers/iio/adc/ti-adc108s102.c
+++ b/drivers/iio/adc/ti-adc108s102.c
@@ -181,13 +181,12 @@ static int adc108s102_read_raw(struct iio_dev *indio_dev,
 
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = adc108s102_scan_direct(st, chan->address);
 
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 
 		if (ret < 0)
 			return ret;
diff --git a/drivers/iio/adc/ti-ads1298.c b/drivers/iio/adc/ti-ads1298.c
index 03f762415fa5..ae30b47e4514 100644
--- a/drivers/iio/adc/ti-ads1298.c
+++ b/drivers/iio/adc/ti-ads1298.c
@@ -319,13 +319,12 @@ static int ads1298_read_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = ads1298_read_one(priv, chan->scan_index);
 
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 
 		if (ret)
 			return ret;
diff --git a/drivers/iio/adc/ti-ads131e08.c b/drivers/iio/adc/ti-ads131e08.c
index 91a79ebc4bde..c6096b64664e 100644
--- a/drivers/iio/adc/ti-ads131e08.c
+++ b/drivers/iio/adc/ti-ads131e08.c
@@ -505,12 +505,11 @@ static int ads131e08_read_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = ads131e08_read_direct(indio_dev, channel, value);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		if (ret)
 			return ret;
 
@@ -551,12 +550,11 @@ static int ads131e08_write_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_SAMP_FREQ:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = ads131e08_set_data_rate(st, value);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		return ret;
 
 	default:
diff --git a/drivers/iio/adc/ti-tlc4541.c b/drivers/iio/adc/ti-tlc4541.c
index 08de997584fd..5a138be983ed 100644
--- a/drivers/iio/adc/ti-tlc4541.c
+++ b/drivers/iio/adc/ti-tlc4541.c
@@ -131,11 +131,10 @@ static int tlc4541_read_raw(struct iio_dev *indio_dev,
 
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 		ret = spi_sync(st->spi, &st->scan_single_msg);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		if (ret < 0)
 			return ret;
 		*val = be16_to_cpu(st->rx_buf[0]);