This has to do with switching over to Device Tree Overlays for processor configurations. The README.md file at https://github.com/jadonk/validation-scripts/tree/master/test-capemgr has a good explanation, but that doesn't make it any easier to get it up and running.
I've cloned the validation-scripts repository from https://github.com/jadonk/validation-scripts.git. I tried to run do_pinctrl_test.sh from test-capemgr folder, but it needs dtc. No problem, right, we'll just install it....wrong! The current version of dtc in ALARM is not patched to support the -@ option (see https://patchwork.kernel.org/patch/1934471/), so you get a "dtc: invalid option -- '@'" error message.
I'm not as hardcore as the guys at http://hipstercircuits.com/adding-beaglebone-cape-support-to-a-kernel-with-device-tree-in-ubuntu/ so I am calling it a night. I will look into how to get a patched version of dtc, but if it involves too much, I can see myself jumping ship and reverting to an older kernel.
FYI: Here are a couple of issues that I ran into, when trying to install ArchLinux, and how to fix them:
I followed the instructions at http://archlinuxarm.org/platforms/armv7/beaglebone for configuring and setting up the SD card. When I followed the links provided though, I ran into 2 issues:
- I could get a u-boot command prompt, but it could not load the kernel image from the SD card. This was solved by copying /boot/uImage to the DOS partition.
- After looking for upgrades ('pacman -Syu'), the kernel update gave a warning that my u-boot was probably out of date. After a reboot, sure enough the "image is wrong type" error message appeared in u-boot. I corrected this by downloading and installing http://os.archlinuxarm.org/os/omap/BeagleBone-bootloader.tar.gz