So the image I’m using on two separate boards: bone-debian-8.7-console-armhf-2017-04-02-1gb.img
One board has uboot capes enabled, and they do function. The other board is not using uboot overlays, but seems odd at times.
So on both board inserting an overlay as such: root@wgd:~# echo BB-UART1 > /sys/devices/platform/bone_capemgr/slots
Causes the terminal session to hang directly after the command is issued. The board is still operational, however after reiitializing an ssh session:
root@wgd:~# cat /sys/devices/platform/bone_capemgr/slots
0: —l-- -1
1: ------ -1
2: —l-- -1
3: —l-- -1
4: --O— -1
root@wgd:~# dmesg | tail
[ 18.436962] net eth0: initializing cpsw version 1.12 (0)
[ 18.436993] net eth0: initialized cpsw ale version 1.4
[ 18.437003] net eth0: ALE Table size 1024
[ 18.445166] net eth0: phy found : id is : 0x7c0f1
[ 18.462196] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 121.758813] cpsw 4a100000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 121.758944] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[346482.260850] bone_capemgr bone_capemgr: part_number ‘BB-UART1’, version ‘N/A’
[346482.260892] bone_capemgr bone_capemgr: slot #4: override
[346482.260910] bone_capemgr bone_capemgr: slot #4: auto loading handled by U-Boot
root@wgd:~# ls /dev |grep ttyO[0-4]
ttyO0
The cape is definitely not loading. The output from these commands here is from the board that is loading overlays via uboot, but I am willing( I have not checked yet ) the output would be identical on the board that does not have uboot overlays enabled. Curiously, I did try the old method of loading the overlay form uEnv.txt, and the overlay did not load correctly then either.
One thing of note which may possibly be the culprit. Is that I do not have a board file for either of these loaded specifically. However on at least the uboot overlay board I have hdmi video and audio both disabled through the new uboot way. I have not checked if any of those pins conflict with that overlay or not, because I have not looked.
I’ll make another post following this one to see how this overlay behaves when i attempt to load via uboot overlays.
