MUX_CTL_IN2P
output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P);
output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P);
output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P);
output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P);
wcd_mbhc_write_field(mbhc, WCD_MBHC_MUX_CTL, MUX_CTL_IN2P);