There are two demands that need to be addressed.
Firstly, an instruction document is required, including the following information: default pin iomux, default pull up and down status of I/O pad ; I / O DC / AC parameters; pin multiplexing function and theoretical maximum working current of each power supply and so on.
Secondly, is there a configuration tool to configure the I / O pin of imx8 chip?
Thank you for the answering the above question!
1. All the data you require can be found in the corresponding processor's Data Sheet and Reference Manual documents. If you specify what exactly i.MX family processor do you mean, I can point you to the exact sections/tables of the corresponding documents.
2. The Pins Tool software can be used for that purpose:
https://www.nxp.com/design/designs/pins-tool-for-i-mx-application-processors:PINS-TOOL-IMX
Best Regards,
Artur