Add documentation for sensor specific iio attributes. 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 + adjustments. Upon reading previously set value is returned. + Units are millibars. + +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 + 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. -- 2.26.1
