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| author |   Irina Tirdea <irina.tirdea@intel.com> | 2015-04-08 18:26:12 +0300 |
|---|---|---|
| committer |   Jonathan Cameron <jic23@kernel.org> | 2015-04-09 12:54:10 +0100 |
| commit | abad398337f038f5822e53c55eff5b0820ef7efe (patch) | |
| tree | e0442b139200afcf71c3f0ff32204d9f3e9d4335 | |
| parent | Merge 4.0-rc7 into staging-next (diff) | |
| download | linux-dev-abad398337f038f5822e53c55eff5b0820ef7efe.tar.xz linux-dev-abad398337f038f5822e53c55eff5b0820ef7efe.zip | |
iio: pressure: bmp280: fix temp compensation
Temperature reads on bmp280 device always return 0,
due to a missing step in the compensation formula
(data->tfine is never initialized).
Initialize data->tfine value so we get correct
temperature and pressure values.
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Reviewed-by: Vlad Dogaru <vlad.dogaru@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| -rw-r--r-- | drivers/iio/pressure/bmp280.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/iio/pressure/bmp280.c b/drivers/iio/pressure/bmp280.c index 7c623e2bd633..a2602d8dd6d5 100644 --- a/drivers/iio/pressure/bmp280.c +++ b/drivers/iio/pressure/bmp280.c @@ -172,6 +172,7 @@ static s32 bmp280_compensate_temp(struct bmp280_data *data, var2 = (((((adc_temp >> 4) - ((s32)le16_to_cpu(buf[T1]))) * ((adc_temp >> 4) - ((s32)le16_to_cpu(buf[T1])))) >> 12) * ((s32)(s16)le16_to_cpu(buf[T3]))) >> 14; + data->t_fine = var1 + var2; return (data->t_fine * 5 + 128) >> 8; } |