Compatible rootfs image (where to get it)

[VasylSamoilov]

Readme file states: "use a full AD provided linux build, just replace BOOT.BIN and device tree file from this build and it should be able to mount the SD card as the root file system".
Question: where to get a compatible "full ad provided linux build", or rootfs image, given that I'm not new to linux, partitioning, bootloaders and everything - and I'm successfully booting current firmware to ramdisk from sd card.
I do understand that fat32 partition is used to boot loader and kernel, and it should be mounting ext partition as root. It would be nice if someone can point me in the direction of compatible rootfs image. Maybe there are build instructions how to compile it?
Goal is to setup linux on sd card so I can develop and compile some software on the device itself.

Thank you.

[VasylSamoilov]

I will answer myself: Analog Devices linux is raspbian (debian) clone named Kuiper Linux. Located here: https://wiki.analog.com/resources/tools-software/linux-software/kuiper-linux. Matching package for this kernel version is Kuiper Linux 2022_r2 Patch 1. Image should be imaged to SD card like raspbian (tool provided), then you will end up with sd card with 2 partitions - fat32 boot and linux root. To boot it you should copy on SD card boot partition uImage, BOOT.BIN and devicetree.dtb from this repo also to root folder. LibreSDR will boot from sd card with random MAC address and dhcp client.
You can also try kernel from zynq-common/uImage (you will loose usb gadget functionality)

What you end up with is actually a raspbian with AD software installed.