Hello Gonzalo,
Our i.MX8MM-EVK doesn't support Charger IC, BUT On our I.MX6DL-SabreSD board, charger IC MAX8903C is supported, so you can refer to it's schematic and charger driver in android.

Attachment is it's schematic.
Or your can also select charger ICs from other providers, basically, they also provide you corresponding drivers.
Hope the information is helpf to you!
Have a great day!
B.R,
Weidong