MODULE_SOFTDEP("pre: another-external-kernel-module...");

because I completely don't understand.

If I have phandle to another-external-kernel-module in dts which is mandatory in my kernel driver then should I put this line in my kernel driver code?

If I use function of core.c which is my framework and this is also as external module then should I  put this line in my kernel driver code:

  MODULE_SOFTDEP("pre: testframework-core");

Who knows please respond as this is black magic for me.