Can you advise me if you do any packages where i can do a firmware update or download some firmware through the RS232 port on a linux system.
I have been using a product called flash magic but this doesn't seem to friendly with linux.
Any suggestions would be appreciated.
You can try the utility that Con Verse is saying. Another option is to develop your own utility, you can use the next application note https://www.nxp.com/docs/en/application-note/AN11229.pdf as a guide to see how you need to send the data through RS232.