[fedora-arm] Samsung Chromebook 2 (Peach Pi), nv u-boot, kernel and initrd

Hi, Has anybody managed to get this to work? I can get to work with a custom kernel, but only using vboot and only without initrd. As soon as I add the initramfs into the .its file, the resulting image doesn't work. Is there a specific load/entry address that has to be used for the initramfs? I tried using 0x50000000 which works on my Chromebook 1 (snow), but it doesn't make any difference. I also built a mainline u-boot which supposedly supports the peach pi chromebook, but I cannot get that to boot anything at all. The kernel fit image (kernel+dtb) that boots fine using vboot (signed for vboot using vbutil_kernel) loads fine in nv u-boot, but the boot gets stuck at Starting kernel ... I am using load address 0x42000000 in u-boot (since that works on snow. Is the memory map on the peach pi radically different? I tried a few different ranges but nothing results in the boot completing. Has anyone managed to get this to work using either nv u-boot or a fit image containing the initramfs? I even tried building the initramfs cpio into the kernel, but that also causes it to stop booting with vboot. The only thing I can think of is the load/entry addresses being very picky for both and some FDT disagreement between nv u-boot and the kernel (u-boot has exynos5800-peach-pi.dts and the chromeos kernel sources use exynos5422-peach-pi.dts). I am running out of ideas of what else to try. :-( Gordan