[yocto] Kernel build directory path

[Arek Marud]

Hello, 

I'm trying to create a recipe for driver from external company.

Unfortunately compilation process require path to Kernel build
directory. I red "Incorporating Out-of-Tree Modules" chapter in Kernel
Dev Manual, and tried to use module.bbclass. But I only got path to
kernel-build-artifacts, that is not enough for driver compilation.

Is there any way to get Kernel build path in recipe?

Best regards
Arek Marud