Issues loading capes

GoogleGroups
1

Hi!
Not really sure where to go from here.

$uname -a
Linux tester 4.9.45-ti-r57 #1 SMP PREEMPT Fri Aug 25 22:58:38 UTC 2017 armv7l GNU/Linux

$ cat /etc/dogtag
rcn-ee.net console Debian Image 2017-08-11

$ sudo sh -c “echo ‘BB-UART1’ > /sys/devices/platform/bone_capemgr/slots”
[ 80.994834] bone_capemgr bone_capemgr: slot #4: override
[ 81.012216] bone_capemgr bone_capemgr: slot #4: auto loading handled by U-Boot

Then that terminal hangs. I can still connect via another ssh or via console.

$ cat /sys/devices/platform/bone_capemgr/slots
0: ------ -1
1: ------ -1
2: —l-- -1
3: —l-- -1
4: --O— -1

I can try rebooting, but the reboot hangs with a stop job running timeout on capemgr.

Any thoughts/tips appreciated. I’m starting to lose my mind…

Pete.

2

Hi Pete,

We moved to u-boot overlays, just way reliable then kernel overlays,
but you need to edit /boot/uEnv.txt

http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays

Regards,

3

Thanks, I’ll check them out.

Just glancing at the doc now, I’m not immediately seeing to how to load while.runing a kernel, unload then reload an newer version. I’m sure it’ll become more obvious once my caffeine levels increase.

Thanks again.

P.

4

Yeah we’ve given up on, loading, unloading, loading in kernel land. Too many race conditions… Everyone has pretty much given up, and the focus is doing it in UBoot.

Regards,

5

Annoying for Testing Land, but I can appreciate.

It may seem like a long time but it’ll only add up to back of the envelope calculations a few minutes over a week.

Cheers again

6

Thank you for the explanation.

As a suggestion - perhaps you could add that to http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Override_external_capes or somewhere? I just spent a rather frustrating day trying to get my capes to load via capemgr/slots on a fresh image and came here to ask the exact same question as Peter. Can’t say I found it obvious that this is no longer possible :slight_smile: