On Wed, 22 Apr 2020, Tomasz Duszynski wrote: > Add documentation for sensor specific iio attributes. minor comments below > Signed-off-by: Tomasz Duszynski <tomasz.duszynski@xxxxxxxxxxx> > --- > Documentation/ABI/testing/sysfs-bus-iio-scd30 | 97 +++++++++++++++++++ > 1 file changed, 97 insertions(+) > create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-scd30 > > diff --git a/Documentation/ABI/testing/sysfs-bus-iio-scd30 b/Documentation/ABI/testing/sysfs-bus-iio-scd30 > new file mode 100644 > index 000000000000..0431a718447d > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-bus-iio-scd30 > @@ -0,0 +1,97 @@ > +What: /sys/bus/iio/devices/iio:deviceX/pressure_comp > +Date: April 2020 > +KernelVersion: 5.8 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Given that sensor's CO2 measurement chamber has fixed volume > + pressure changes will affect concentration readings. Writing > + current ambient pressure here will allow senor to make necessary sensor > + adjustments. Upon reading previously set value is returned. > + Units are millibars. unit for pressure in IIO is kilopascal (e.g. /sys/bus/iio/devices/iio:deviceX/in_pressure_raw) > + > +What: /sys/bus/iio/devices/iio:deviceX/pressure_comp_available > +Date: April 2020 > +KernelVersion: 5.8 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + The range of available values in millibars represented as the > + minimum value, the step and the maximum value, all enclosed in > + square brackets. > + > +What: /sys/bus/iio/devices/iio:deviceX/meas_interval > +Date: January 2020 > +KernelVersion: 5.8 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Amount of time between subsequent measurements. Writing this > + attribute will change measurement interval. Upon reading > + current measurement interval is returned. Units are seconds. > + > +What: /sys/bus/iio/devices/iio:deviceX/meas_interval_available > +Date: April 2020 > +KernelVersion: 5.8 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + The range of available values in seconds represented as the > + minimum value, the step and the maximum value, all enclosed in > + square brackets. > + > +What: /sys/bus/iio/devices/iio:deviceX/asc > +Date: April 2020 > +KernelVersion: 5.8 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Writing 1 or 0 to this attribute will respectively activate or > + deactivate automatic self calibration procedure. Upon reading 1 deactivate automatic self calibration (asc) procedure > + is returned if asc is ongoing, 0 otherwise. > + > +What: /sys/bus/iio/devices/iio:deviceX/frc > +Date: April 2020 > +KernelVersion: 5.8 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Forced recalibration is used to compensate for sensor drifts > + when a reference value of CO2 concentration in close proximity > + to the sensor is available. Writing attribute will set frc > + value. Upon reading current frc is returned. Units are > + millibars. > + > +What: /sys/bus/iio/devices/iio:deviceX/frc_available > +Date: April 2020 > +KernelVersion: 5.8 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + The range of available values in millibars represented as the > + minimum value, the step and the maximum value, all enclosed in > + square brackets. > + > +What: /sys/bus/iio/devices/iio:deviceX/temp_offset > +Date: April 2020 > +KernelVersion: 5.8 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Sensor readings may be affected by ambient temperature. > + Writing temperature offset will compensate for unwanted changes. > + Note that written offset gets multiplied by a factor of 100 > + by a sensor internally. > + > + For example, writing 10 here will correspond to 0.1 degree > + Celsius. > + > +What: /sys/bus/iio/devices/iio:deviceX/temp_offset_available > +Date: April 2020 > +KernelVersion: 5.8 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + The range of available values in degrees Celsius represented as > + the minimum value, the step and the maximum value, all enclosed > + in square brackets. > + > +What: /sys/bus/iio/devices/iio:deviceX/reset > +Date: April 2020 > +KernelVersion: 5.8 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Software reset mechanism forces sensor into the same state > + as after powering up without the need for removing power supply. > + Writing any value will reset sensor. > -- Peter Meerwald-Stadler Mobile: +43 664 24 44 418
