Build yocto for yellow

Hello. Could you send or explain how to build yocto for yellow mango.
As far as I understand, all the drivers for the board are contained in legato, but the drivers for wifi are already in yocto.

does this help?

no. wifi doesn’t start, problem in module cfg80211.
i use patch from this

but even after that the wifi did not work.
But after deleting bluetooth file in /etc/init.d/ wifi began to work
But it’s not solution.

How about the official fw

yes, 0.7.0 is worked. But i want build custom yocto image

Then you can compare the folder init.d