bq27xxx_battery_read_time
ret = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE, val);
ret = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP, val);
ret = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF, val);