on my overo I need to use uart2 (those pins are muxed to the BT/wifi module and I don't need the BT/wifi).

Doing a few searches, I can see there is a patch to apply to u-boot to configure the correct muxing for these pins.

The easyway is to change the u-boot source code. But, this could result in a coding horor. So, I guess, I need to place the patch in my own meta layer.

I does not yet understand fully how to do this work.

I know I have to create a .bb named u-boot in my layer but what next to add the patch to the u-boot ?

how to name the file to append ?
what to insert in my recipe ? (is there any example I could look at?)

If anyone could help me on this issue, I would appreciate :-)

Thank you