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iio: core: introduce trough info element for minimum values

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The IIO_CHAN_INFO_PEAK info element is used for maximum values and
currently there is no equivalent for minimum values. Instead of
overloading the existing peak info element, a new info element can
be added.

In principle there is no need to add a _TROUGH_SCALE element as the
scale will be the same as the one required for INFO_PEAK, which in
turn is sometimes omitted if a single scale for peaks and raw values
is required.

Add an IIO_CHAN_INFO_TROUGH info element for minimum values.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://lore.kernel.org/r/20231211122747.9723-1-579lpy@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Javier Carrasco 2023-12-11 20:27:47 +08:00 committed by Jonathan Cameron
parent 8b0d4c40d7
commit 5bc2ea6089
2 changed files with 2 additions and 0 deletions
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1
drivers/iio/industrialio-core.c
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@ -184,6 +184,7 @@ static const char * const iio_chan_info_postfix[] = {
[IIO_CHAN_INFO_THERMOCOUPLE_TYPE] = "thermocouple_type",
[IIO_CHAN_INFO_CALIBAMBIENT] = "calibambient",
[IIO_CHAN_INFO_ZEROPOINT] = "zeropoint",
[IIO_CHAN_INFO_TROUGH] = "trough_raw",
};
/**
* iio_device_id() - query the unique ID for the device

1
include/linux/iio/types.h
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@ -68,6 +68,7 @@ enum iio_chan_info_enum {
IIO_CHAN_INFO_THERMOCOUPLE_TYPE,
IIO_CHAN_INFO_CALIBAMBIENT,
IIO_CHAN_INFO_ZEROPOINT,
IIO_CHAN_INFO_TROUGH,
};
#endif /* _IIO_TYPES_H_ */