diff options
| author | Roan van Dijk <roan@protonic.nl> | 2021-10-21 16:00:18 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-10-21 20:53:11 +0100 |
| commit | e46e2512ac84bd914212dc4b639d596db543f5b1 (patch) | |
| tree | 6ce37605305834f9820fc7ae931cc8bfa41a14d3 /drivers/iio | |
| parent | 392998a8032a59bff4ec14dc9d5098c60b50baf9 (diff) | |
iio: chemical: scd4x: Add a scale for the co2 concentration reading
This patch adds a scale for the co2 concentration reading. The reading is
expressed in percent after applying the scale to the raw value.
Signed-off-by: Roan van Dijk <roan@protonic.nl>
Link: https://lore.kernel.org/r/20211021140018.3051213-1-roan@protonic.nl
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/chemical/scd4x.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/iio/chemical/scd4x.c b/drivers/iio/chemical/scd4x.c index ebebcb117ba2..267bc3c05338 100644 --- a/drivers/iio/chemical/scd4x.c +++ b/drivers/iio/chemical/scd4x.c @@ -353,7 +353,11 @@ static int scd4x_read_raw(struct iio_dev *indio_dev, *val = ret; return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: - if (chan->type == IIO_TEMP) { + if (chan->type == IIO_CONCENTRATION) { + *val = 0; + *val2 = 100; + return IIO_VAL_INT_PLUS_MICRO; + } else if (chan->type == IIO_TEMP) { *val = 175000; *val2 = 65536; return IIO_VAL_FRACTIONAL; @@ -503,7 +507,8 @@ static const struct iio_chan_spec scd4x_channels[] = { .type = IIO_CONCENTRATION, .channel2 = IIO_MOD_CO2, .modified = 1, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), .address = SCD4X_CO2, .scan_index = SCD4X_CO2, .scan_type = { |