4.17-stable review patch. If anyone has any objections, please let me know.
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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 @@ -415,10 +415,9 @@ static int bmp280_read_humid(struct bmp2 } 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,