[PATCH] iio: temperature: max30208: fix wrong scale value

[Salah Triki]

The driver currently returns a scale of 5 for IIO_CHAN_INFO_SCALE, which
leads to incorrect temperature readings.

According to the MAX30208 datasheet, the temperature resolution is 0.005°C
per LSB. Using IIO_VAL_FRACTIONAL with 5/1000 correctly represents this
16-bit resolution.

Fix the scale value to ensure user space tools report the temperature
correctly in Celsius.

Fixes: 9ee95ae4cffd ("iio: temperature: Add driver support for Maxim
MAX30208")
Signed-off-by: Salah Triki <salah.triki@xxxxxxxxx>
---
 drivers/iio/temperature/max30208.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/temperature/max30208.c b/drivers/iio/temperature/max30208.c
index 720469f9dc36..96f63c4fb2b6 100644
--- a/drivers/iio/temperature/max30208.c
+++ b/drivers/iio/temperature/max30208.c
@@ -163,7 +163,8 @@ static int max30208_read(struct iio_dev *indio_dev,
 
 	case IIO_CHAN_INFO_SCALE:
 		*val = 5;
-		return IIO_VAL_INT;
+		*val2 = 1000;
+		return IIO_VAL_FRACTIONAL;
 
 	default:
 		return -EINVAL;
-- 
2.43.0