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iio: pressure: bmp280: Fix BMP580 temperature reading
commit 0f0f630661
upstream.
Fix overflow issue when storing BMP580 temperature reading and
properly preserve sign of 24-bit data.
Signed-off-by: Adam Rizkalla <ajarizzo@gmail.com>
Tested-By: Vasileios Amoiridis <vassilisamir@gmail.com>
Acked-by: Angel Iglesias <ang.iglesiasg@gmail.com>
Link: https://lore.kernel.org/r/Zin2udkXRD0+GrML@adam-asahi.lan
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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parent
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1 changed files with 5 additions and 5 deletions
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@ -1394,12 +1394,12 @@ static int bmp580_read_temp(struct bmp280_data *data, int *val, int *val2)
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/*
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* Temperature is returned in Celsius degrees in fractional
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* form down 2^16. We rescale by x1000 to return milli Celsius
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* to respect IIO ABI.
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* form down 2^16. We rescale by x1000 to return millidegrees
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* Celsius to respect IIO ABI.
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*/
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*val = raw_temp * 1000;
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*val2 = 16;
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return IIO_VAL_FRACTIONAL_LOG2;
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raw_temp = sign_extend32(raw_temp, 23);
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*val = ((s64)raw_temp * 1000) / (1 << 16);
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return IIO_VAL_INT;
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}
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static int bmp580_read_press(struct bmp280_data *data, int *val, int *val2)
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