What is this
This is a release from openwrt-24.10 branch, which is made for avanta devices using official kirkwood source.
So, the target name for 88f6560 devices (ZTE F660/F460/F420/F620 V3, HQW HGG420N) is called kirkwood here.
I replaced kirkwood target folder (target/linux/kirkwood) with avanta 88f6560 files.
Official openwrt-24.10.2 package source compatibility
There are some hacks to make the output images compatible with official kmod source,
but only work if you use official kirkwood 24.10.2 config template which can be found there config.buildinfo
Otherwise you will get images that only support official userspace package source.
To do that, you need to download config.buildinfo file, rename it to .config and place it in openwrt repository root directory,
make sure you have done ./scripts/feeds update -a and ./scripts/feeds install -a , then run make defconfig and here you go.
Finally, you can run make with your own parameters.
Kernel partition size: 4096K
Do a clean installation instead of sysupgrade if your current firmware has a different kernel size.
The steps to do a clean installation in u-boot is described here openwrt-now-support-zte-f660-v3-0-and-hgg420n
If you have custom package to build, just use official 24.10.2 kirkwood SDK