kernel-docs from Kernel:openSUSE-15.2 project

Select Your Operating System

For standard run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Kernel:openSUSE-15.2/standard/Kernel:openSUSE-15.2.repo
zypper refresh
zypper install kernel-docs
For ports run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Kernel:openSUSE-15.2/ports/Kernel:openSUSE-15.2.repo
zypper refresh
zypper install kernel-docs