diff options
| author | Javier Carrasco <javier.carrasco.cruz@gmail.com> | 2024-01-03 13:08:51 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2024-01-22 18:58:44 +0000 |
| commit | 8745465e884c06736aafc6c0e7344ac3a3c7df94 (patch) | |
| tree | 9683eb5b7c4a04e4582f9b41bff0cfed31a42e0a /drivers/iio | |
| parent | 6613476e225e090cc9aad49be7fa504e290dd33d (diff) | |
| download | linux-8745465e884c06736aafc6c0e7344ac3a3c7df94.tar.gz | |
iio: light: as73211: use IIO_VAL_FRACTIONAL for intensity scales
The scale values associated to the light channels are calculated as a
division that can be better expressed as an IIO_VAL_FRACTIONAL type
instead of the current IIO_VAL_INT.
Note that the constant values used for the calculation were scaled up to
work with integers, turning the nW/cm^2 units from the datasheet into
nW/m^2, which would not be necessary with the IIO_VAL_FRACTIONAL type.
But to avoid issues from current users of the driver, the units must be
kept.
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/light/as73211.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/iio/light/as73211.c b/drivers/iio/light/as73211.c index ec97a3a468392d..b4c6f389a292dd 100644 --- a/drivers/iio/light/as73211.c +++ b/drivers/iio/light/as73211.c @@ -356,25 +356,24 @@ static int as73211_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec cons return IIO_VAL_INT_PLUS_MICRO; case IIO_INTENSITY: { - unsigned int scale; switch (chan->channel2) { case IIO_MOD_X: - scale = AS73211_SCALE_X; + *val = AS73211_SCALE_X; break; case IIO_MOD_Y: - scale = AS73211_SCALE_Y; + *val = AS73211_SCALE_Y; break; case IIO_MOD_Z: - scale = AS73211_SCALE_Z; + *val = AS73211_SCALE_Z; break; default: return -EINVAL; } - scale /= as73211_gain(data); - scale /= as73211_integration_time_1024cyc(data); - *val = scale; - return IIO_VAL_INT; + *val2 = as73211_integration_time_1024cyc(data) * + as73211_gain(data); + + return IIO_VAL_FRACTIONAL; default: return -EINVAL; |