From: Dimitri Fedrau <dimitri.fedrau@liebherr.com>

According to the ABI the units after application of scale and offset are
milli degrees for temperature measurements and milli percent for relative
humidity measurements. Currently the resulting units are degree celsius for
temperature measurements and percent for relative humidity measurements.
Change scale factor to fix this issue.

Fixes: c9180b8e39be ("iio: humidity: Add driver for ti HDC302x humidity sensors")
Reported-by: Chris Lesiak <chris.lesiak@licorbio.com>
Suggested-by: Chris Lesiak <chris.lesiak@licorbio.com>
Signed-off-by: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
---
 drivers/iio/humidity/hdc3020.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/humidity/hdc3020.c b/drivers/iio/humidity/hdc3020.c
index ffb25596d3a8bad01d1f84a9a972561266f65d76..8aa567d9aded9cab461f1f905b6b5ada721ba2f0 100644
--- a/drivers/iio/humidity/hdc3020.c
+++ b/drivers/iio/humidity/hdc3020.c
@@ -301,9 +301,9 @@ static int hdc3020_read_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_SCALE:
 		*val2 = 65536;
 		if (chan->type == IIO_TEMP)
-			*val = 175;
+			*val = 175 * MILLI;
 		else
-			*val = 100;
+			*val = 100 * MILLI;
 		return IIO_VAL_FRACTIONAL;
 
 	case IIO_CHAN_INFO_OFFSET:

-- 
2.39.5

On Tue Sep 2, 2025 at 1:51 AM CST, Dimitri Fedrau via B4 Relay wrote:
> From: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
>
> According to the ABI the units after application of scale and offset are
> milli degrees for temperature measurements and milli percent for relative
> humidity measurements. Currently the resulting units are degree celsius for
> temperature measurements and percent for relative humidity measurements.
> Change scale factor to fix this issue.
>
> Fixes: c9180b8e39be ("iio: humidity: Add driver for ti HDC302x humidity sensors")
> Reported-by: Chris Lesiak <chris.lesiak@licorbio.com>
> Suggested-by: Chris Lesiak <chris.lesiak@licorbio.com>
> Signed-off-by: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
> ---
>  drivers/iio/humidity/hdc3020.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/iio/humidity/hdc3020.c b/drivers/iio/humidity/hdc3020.c
> index ffb25596d3a8bad01d1f84a9a972561266f65d76..8aa567d9aded9cab461f1f905b6b5ada721ba2f0 100644
> --- a/drivers/iio/humidity/hdc3020.c
> +++ b/drivers/iio/humidity/hdc3020.c
> @@ -301,9 +301,9 @@ static int hdc3020_read_raw(struct iio_dev *indio_dev,
>  	case IIO_CHAN_INFO_SCALE:
>  		*val2 = 65536;
>  		if (chan->type == IIO_TEMP)
> -			*val = 175;
> +			*val = 175 * MILLI;
>  		else
> -			*val = 100;
> +			*val = 100 * MILLI;
>  		return IIO_VAL_FRACTIONAL;
>  
>  	case IIO_CHAN_INFO_OFFSET:

Reviewed-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>