IIRC this was never integrated but was supported via community initiative:

Please take a look on CPU usage precision on the new kernel for x64 and arm64. It is 1 milliseconds. But kernel 6.13 on armv7 still provides 4 milliseconds of precision. How do I tune CPU usage precision on image build?

@Marco Cettina When you apply the overlay, the PWM driver will loaded and export some files to /sys. I haven't figured out what to do with it next or how to use it yet. I hope you can clarify this for all of us. PR: pull/8086

PanVK has reached a new milestone, and is now officially conformant with the Vulkan 1.1 specification on the Arm Mali-G610 GPU! The submission was done from the Mesa 25.0.2 release, and covers both armhf as well as aarch64 architectures. View the full article

https://github.com/The-going/PKG_test/tree/master/sunxi64-6.13 You can install these pre-assembled kernel packages and check their functionality. /boot/armbianEnv.txt ... overlay_prefix=sun50i-h616 overlays=pwm1-ph3 ...