[U-Boot] License Problems for standalone application at u-boot

[Peter Chen]

Dear u-boot authors,

We have a standalone application, and u-boot will supply jump address
and some services to this application.
I wonder are there any license problems (GPL or u-boot) for our
standalone application at below condition:

1. Some services which we wrote have included some u-boot header file?
2. All the services we wrote by ourselves, and not using any u-boot
source code and header file?

Currently, we are number 1 situation.

Thank you

Best Regards,
Peter Chen