Hi Nayab Basha Sayed,
I found the complete series is relevant even with kernel 5.15.y
I have tried your easy to work with instructions made my work easy.
And using your instructions I am able to create RPi3 up with new kernel 5.15.y, kernel option in ct-ng 5.15.37 in just one day.
This is my first time bring up the complete kernel, rootfs and initfs from scratch. I really thank you!

My main motive is to bring up the kernel, rootfs and initfs from scratch and making a easy learning env. for kernel and device driver for myself.

But I am finding 2 issues:
1) lsmod command is not working to list the modules.
2) wifi interface is not coming up, my UART is also not coming once the kernel start up.
if you can help to extend this article to give more input on initFS will be a help.

Thanks,

Glad the Embedded Linux RPi series is helpful for you. Assuming initFS is initramfs , the initial goal was to make the series as easy as possible for the new comers. Yes initramfs and WiFi bring up will be done as part of Embedded Linux with Yocto Linux series (upcoming) and subsequently will be added here also.
lsmod was working for me. Would be helpful if give some more details.
It will be really appreciated if you share the Embedded Linux series with your colleagues and friends. Thanks

Surely Nayab I will share this to my friends and colleagues.
lsmod is giving no output at all.

My sever in lab area because UART is not working for me when kernel started. I am unable to progress without UART i tried my cmdline.txt but no help. Can you help me with this, i would be really appreciated? Not changed any env variable in uboot.

Use HDMI cable to connect to monitor/TV. Connect mouse and keyboard to RPi. You will see all logs. I didn't use UART cable. May be this will help you establishing UART connection to your RPi. https://elinux.org/RPi_Seri...