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iio:chemical:bme680: Fix, report temperature in millidegrees 

The standard unit for temperature is millidegrees Celcius. Adapt the
driver to report in millidegrees instead of degrees.

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Fixes: 1b3bd85927 ("iio: chemical: Add support for Bosch BME680 sensor");
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Mike Looijmans 2019-03-06 08:31:47 +01:00 committed by Jonathan Cameron
parent 831d2fefdf
commit 9436f45dd5
1 changed files with 7 additions and 9 deletions
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16
drivers/iio/chemical/bme680_core.c
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@ -583,8 +583,7 @@ static int bme680_gas_config(struct bme680_data *data)
return ret;
}
static int bme680_read_temp(struct bme680_data *data,
int *val, int *val2)
static int bme680_read_temp(struct bme680_data *data, int *val)
{
struct device *dev = regmap_get_device(data->regmap);
int ret;
@ -617,10 +616,9 @@ static int bme680_read_temp(struct bme680_data *data,
* compensate_press/compensate_humid to get compensated
* pressure/humidity readings.
*/
if (val && val2) {
*val = comp_temp;
*val2 = 100;
return IIO_VAL_FRACTIONAL;
if (val) {
*val = comp_temp * 10; /* Centidegrees to millidegrees */
return IIO_VAL_INT;
}
return ret;
@ -635,7 +633,7 @@ static int bme680_read_press(struct bme680_data *data,
s32 adc_press;
/* Read and compensate temperature to get a reading of t_fine */
ret = bme680_read_temp(data, NULL, NULL);
ret = bme680_read_temp(data, NULL);
if (ret < 0)
return ret;
@ -668,7 +666,7 @@ static int bme680_read_humid(struct bme680_data *data,
u32 comp_humidity;
/* Read and compensate temperature to get a reading of t_fine */
ret = bme680_read_temp(data, NULL, NULL);
ret = bme680_read_temp(data, NULL);
if (ret < 0)
return ret;
@ -761,7 +759,7 @@ static int bme680_read_raw(struct iio_dev *indio_dev,
case IIO_CHAN_INFO_PROCESSED:
switch (chan->type) {
case IIO_TEMP:
return bme680_read_temp(data, val, val2);
return bme680_read_temp(data, val);
case IIO_PRESSURE:
return bme680_read_press(data, val, val2);
case IIO_HUMIDITYRELATIVE: