VCNL4040_ALS_CONF_PERS
ret_pers = FIELD_GET(VCNL4040_ALS_CONF_PERS, ret);
regval = FIELD_PREP(VCNL4040_ALS_CONF_PERS, i);
regval |= (ret & ~VCNL4040_ALS_CONF_PERS);