Commit e46e2512 authored by Roan van Dijk's avatar Roan van Dijk Committed by Jonathan Cameron
Browse files

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: default avatarRoan van Dijk <roan@protonic.nl>
Link: https://lore.kernel.org/r/20211021140018.3051213-1-roan@protonic.nl


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 392998a8

drivers/iio/chemical/scd4x.c

+7 −2
Original line number Diff line number Diff line
@@ -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 = {