u-boot (forks) status

[CameronNemo]

Unfortunately I could not get even a basic boot.scr to work with mainline u-boot (the recent 2020.04 release). Does anyone have any tips for debugging or known-working images (idbloader.img and u-boot.itb) that I can use as reference?

Here is the boot.cmd I am using:

```
setenv blink_power 'led power off; sleep 0.1; led power on'
while true; do run blink_power; sleep 1; done
```

I am building the script image with:

```
mkimage -C none -A arm -T script -d boot.cmd boot.scr
```

The ATF/u-boot build recipes are here: https://github.com/void-linux/void-packages/pull/21198

My sfdisk config is:

```
label: gpt
unit: sectors
first-lba: 64

/dev/mmcblk1p1 : start= 64, size= 16320, type=8DA63339-0007-60C0-C436-083AC8230908, name="IDBLoader", attrs="RequiredPartition"
/dev/mmcblk1p2 : start= 16384, size= 8192, type=8DA63339-0007-60C0-C436-083AC8230908, name="U-Boot", attrs="RequiredPartition"
/dev/mmcblk1p3 : start= 24576, size= 8192, type=8DA63339-0007-60C0-C436-083AC8230908, name="TrustedFirmware-A", attrs="RequiredPartition"
/dev/mmcblk1p4 : start= 32768, size= 229376, type=L, name="BootFS", bootable, attrs="LegacyBIOSBootable"
/dev/mmcblk1p6 : start= 262144, type=L, name="RootFS"
```

I then flash the images to the first two partitions, make a 32 bit FAT filesystem on the bootfs, mount it, and copy the boot.scr into the bootfs.