Unable to boot up RPi 3b+

[mharishankar]

Hi,
Is your build intended to work with the Pi model 3b+? I followed your instructions exactly as is multiple times from scratch, but the Pi doesn't boot up and gives me red flashing light (4 flashes in a row). I also get no HDMI output though monitor is plugged in.

Thanks!

[kkamagui]

@mharishankar , I guess you used the wrong firmware or OS image. This repository is for RPI 3, not RPI 3B or 3B+. So, that's the reason I think. :)

[mharishankar]

Got it, thanks for the clarification! I'll change the firmware + kernel image.

Can you also clarify why rpi3.mk in build/ seems to repeat the same targets multiple times? Eg make all executes linux as well as update_rootfs, but update_rootfs executes filelist-tee which executes linux again. Is there any good reason for doing this?

[kkamagui]

@mharishankar , hmm... I'm not sure, but is update_rootfs just copies the Linux kernel executable? As I know, update_rootfs makes a root filesystem. So it just copies the kernel into the filesystem. :)

[mharishankar]

Yup I removed the redundant remakes of linux from update_rootfs and some other places, and make all works just fine. Also, I was able to get everything working on a Pi 3B without major issues! (Pi 3B+ didnt work, and I didnt try with Pi 3; looks like you're referencing 3-b.dtb in build/ so I think your repo is currently configured for 3B).

[kkamagui]

@mharishankar , it's fine. 👍 I hope everything goes well.