| From foo@baz Wed Aug 22 09:42:09 CEST 2018 |
| From: Tomasz Duszynski <tduszyns@gmail.com> |
| Date: Mon, 28 May 2018 17:38:59 +0200 |
| Subject: iio: pressure: bmp280: fix relative humidity unit |
| |
| From: Tomasz Duszynski <tduszyns@gmail.com> |
| |
| [ Upstream commit 13399ff25f179811ce9c1df1523eb39f9e4a4772 ] |
| |
| According to IIO ABI relative humidity reading should be |
| returned in milli percent. |
| |
| This patch addresses that by applying proper scaling and |
| returning integer instead of fractional format type specifier. |
| |
| Note that the fixes tag is before the driver was heavily refactored |
| to introduce spi support, so the patch won't apply that far back. |
| |
| Signed-off-by: Tomasz Duszynski <tduszyns@gmail.com> |
| Fixes: 14beaa8f5ab1 ("iio: pressure: bmp280: add humidity support") |
| Acked-by: Matt Ranostay <matt.ranostay@konsulko.com> |
| Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> |
| Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| drivers/iio/pressure/bmp280-core.c | 5 ++--- |
| 1 file changed, 2 insertions(+), 3 deletions(-) |
| |
| --- a/drivers/iio/pressure/bmp280-core.c |
| +++ b/drivers/iio/pressure/bmp280-core.c |
| @@ -347,10 +347,9 @@ static int bmp280_read_humid(struct bmp2 |
| adc_humidity = be16_to_cpu(tmp); |
| comp_humidity = bmp280_compensate_humidity(data, adc_humidity); |
| |
| - *val = comp_humidity; |
| - *val2 = 1024; |
| + *val = comp_humidity * 1000 / 1024; |
| |
| - return IIO_VAL_FRACTIONAL; |
| + return IIO_VAL_INT; |
| } |
| |
| static int bmp280_read_raw(struct iio_dev *indio_dev, |