What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_agc_gain What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_agc_gain_bias KernelVersion: 4.18 Contact: linux-iio@vger.kernel.org Description: This sensor has an automatic gain control (agc) loop which sets the analog signal levels at an optimum level by controlling programmable gain amplifiers. The criteria for optimal gain is determined by the sensor. Return the actual gain value as an integer in [0; 65536] range when read from. The agc gain read when measuring crosstalk shall be written into in_proximity0_agc_gain_bias. What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calib_phase_temp_a What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calib_phase_temp_b What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calib_phase_light_a What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calib_phase_light_b KernelVersion: 4.18 Contact: linux-iio@vger.kernel.org Description: The sensor is able to perform correction of distance measurements due to changing temperature and ambient light conditions. It can be programmed to correct for a second order error polynomial. Phase data has to be collected when temperature and ambient light are modulated independently. Then a least squares curve fit to a second order polynomial has to be generated from the data. The resultant curves have the form ax^2 + bx + c. From those two curves, a and b coefficients shall be stored in in_proximity0_calib_phase_temp_a and in_proximity0_calib_phase_temp_b for temperature and in in_proximity0_calib_phase_light_a and in_proximity0_calib_phase_light_b for ambient light. Those values must be integer in [0; 8355840] range. Finally, the c constant is set by the sensor internally. The value stored in sensor is displayed when read from. |