iio: Replace occurrences of magic number 0 by IIO_CHAN_INFO_RAW

Usually, functions responsible for reading raw data typically relies on
values from iio_chan_info_enum to correctly identify the type of data to
be read. There is a set of a device driver that uses the magic number 0
instead of IIO_CHAN_INFO_RAW. This patch improves the readability by
replaces the magic number 0 for the appropriate IIO_CHAN_INFO_RAW in six
devices driver in the IIO subsystem.
Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/accel/hid-sensor-accel-3d.c

@@ -155,7 +155,7 @@ static int accel_3d_read_raw(struct iio_dev *indio_dev,
 	*val = 0;
 	*val2 = 0;
 	switch (mask) {
-	case 0:
+	case IIO_CHAN_INFO_RAW:
 		hid_sensor_power_state(&accel_state->common_attributes, true);
 		report_id = accel_state->accel[chan->scan_index].report_id;
 		address = accel_3d_addresses[chan->scan_index];

drivers/iio/dac/ad5380.c

@@ -158,7 +158,7 @@ static unsigned int ad5380_info_to_reg(struct iio_chan_spec const *chan,
 	long info)
 {
 	switch (info) {
-	case 0:
+	case IIO_CHAN_INFO_RAW:
 		return AD5380_REG_DATA(chan->address);
 	case IIO_CHAN_INFO_CALIBBIAS:
 		return AD5380_REG_OFFSET(chan->address);

drivers/iio/dac/ad5764.c

@@ -168,7 +168,7 @@ static int ad5764_read(struct iio_dev *indio_dev, unsigned int reg,
 static int ad5764_chan_info_to_reg(struct iio_chan_spec const *chan, long info)
 {
 	switch (info) {
-	case 0:
+	case IIO_CHAN_INFO_RAW:
 		return AD5764_REG_DATA(chan->address);
 	case IIO_CHAN_INFO_CALIBBIAS:
 		return AD5764_REG_OFFSET(chan->address);

drivers/iio/gyro/hid-sensor-gyro-3d.c

@@ -115,7 +115,7 @@ static int gyro_3d_read_raw(struct iio_dev *indio_dev,
 	*val = 0;
 	*val2 = 0;
 	switch (mask) {
-	case 0:
+	case IIO_CHAN_INFO_RAW:
 		hid_sensor_power_state(&gyro_state->common_attributes, true);
 		report_id = gyro_state->gyro[chan->scan_index].report_id;
 		address = gyro_3d_addresses[chan->scan_index];

drivers/iio/light/hid-sensor-als.c

@@ -97,7 +97,7 @@ static int als_read_raw(struct iio_dev *indio_dev,
 	*val = 0;
 	*val2 = 0;
 	switch (mask) {
-	case 0:
+	case IIO_CHAN_INFO_RAW:
 		switch (chan->scan_index) {
 		case  CHANNEL_SCAN_INDEX_INTENSITY:
 		case  CHANNEL_SCAN_INDEX_ILLUM:

drivers/iio/light/lm3533-als.c

@@ -199,7 +199,7 @@ static int lm3533_als_read_raw(struct iio_dev *indio_dev,
 	int ret;
 
 	switch (mask) {
-	case 0:
+	case IIO_CHAN_INFO_RAW:
 		switch (chan->type) {
 		case IIO_LIGHT:
 			ret = lm3533_als_get_adc(indio_dev, false, val);