[PATCH] iio: chemical: atlas-ezo-sensor: refactor IIO_CHAN_INFO_SCALE checks

[Matt Ranostay <matt.ranostay@konsulko.com>]

Additional modifiers in IIO_CHAN_INFO_SCALE check will mostly have a ppm
unit and the switch statement is more confusing, and adds unneeded code.

Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
---
 drivers/iio/chemical/atlas-ezo-sensor.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/chemical/atlas-ezo-sensor.c b/drivers/iio/chemical/atlas-ezo-sensor.c
index 307c3488f4bd..5fae1c4087ee 100644
--- a/drivers/iio/chemical/atlas-ezo-sensor.c
+++ b/drivers/iio/chemical/atlas-ezo-sensor.c
@@ -165,17 +165,19 @@ static int atlas_ezo_read_raw(struct iio_dev *indio_dev,
 			return -EINVAL;
 		}
 
-		/* IIO_CONCENTRATION modifiers */
-		switch (chan->channel2) {
-		case IIO_MOD_CO2:
-			*val = 0;
-			*val2 = 100; /* 0.0001 */
-			return IIO_VAL_INT_PLUS_MICRO;
-		case IIO_MOD_O2:
+		if (chan->channel2 == IIO_NO_MOD)
+			return -EINVAL;
+
+		// IIO_CONCENTRATION modifier for percent
+		if (chan->channel2 == IIO_MOD_O2) {
 			*val = 100;
 			return IIO_VAL_INT;
 		}
-		return -EINVAL;
+
+		// IIO_CONCENTRATION modifier for PPM - 0.0001
+		*val = 0;
+		*val2 = 100;
+		return IIO_VAL_INT_PLUS_MICRO;
 	}
 
 	return 0;
-- 
2.30.2