ADC_TM5_M_CTL_HW_SETTLE_DELAY_MASK
buf[6] &= ~ADC_TM5_M_CTL_HW_SETTLE_DELAY_MASK;
buf[6] |= FIELD_PREP(ADC_TM5_M_CTL_HW_SETTLE_DELAY_MASK, channel->hw_settle_time);