Kernel 4.1.9 overlays not working

bremenpl · October 12, 2015, 9:01am

Hello there,
I have installed latest console version of Debian from eLinux.org. Its uses kernel version 4.1.9:

Linux beaglebone 4.1.9-ti-r20 #1 SMP PREEMPT Fri Oct 2 05:35:56 UTC 2015 armv7l GNU/Linux

I was trying to load BB-UART5 overlay but I failed. I also dont see any overlays loaded I thought I would, like eMMC:

root@beaglebone:/sys/devices/platform/bone_capemgr# cat slots 0: PF---- -1 1: PF---- -1 2: PF---- -1 3: PF---- -1

When I tried to load the tree i got:

[ 3013.532495] bone_capemgr bone_capemgr: part_number 'BB-UART5', version 'N/A' [ 3013.532543] bone_capemgr bone_capemgr: slot #4: override [ 3013.532561] bone_capemgr bone_capemgr: Using override eeprom data at slot 4 [ 3013.532579] bone_capemgr bone_capemgr: slot #4: 'Override Board Name,00A0,Override Manuf,BB-UART5' [ 3013.533110] __of_adjust_tree_phandle_references: Could not find target property 'fixup' @/__local_fixups__ [ 3013.548518] bone_capemgr bone_capemgr: slot #4: Failed to resolve tree

And I have compiled the tds before and put the dtbo in /lib/firmware/

Has anything changed in the new kernel regarding dts loading and general usage?
I would apreciate all help regarding this topic!

Andreas_Muller · October 12, 2015, 9:48am

Am not sure: Did you compile dts with the patched version of dtc?

Andreas

bremenpl · October 12, 2015, 9:51am

I used dtc in version 1.4.0 i believe.

Andreas_Muller · October 12, 2015, 9:58am

To make overlays build properly, you need a special version of dtc
found at [1] further details see [2]

[1] https://github.com/pantoniou/dtc
[2] https://github.com/beagleboard/bb.org-overlays

Andreas

bremenpl · October 12, 2015, 10:03am

I will try this out, thank you.

W dniu 2015-10-12 o 11:58, 'Andreas Müller' via BeagleBoard pisze:

bremenpl · October 12, 2015, 10:32am

Im sorry but I cant find any source on how to install the dtc compiller after I have downloaed it from http://devicetree.org/Device_Tree_Compiler

W dniu 2015-10-12 o 11:58, 'Andreas Müller' via BeagleBoard pisze:

bremenpl · October 12, 2015, 10:51am

I think I managed to do everything, thank you.
There is still one thing that differs from version 3.8 kernel- I dont see either hdmi/emmc was disabled or not by looking at the slots. How can I check that?

W dniu 2015-10-12 o 11:58, 'Andreas Müller' via BeagleBoard pisze:

Lee_Armstrong · October 13, 2015, 2:36pm

I am also getting the same error with 4.1.9-ti-r20, what exactly did you do to fix it?

RobertCNelson · October 13, 2015, 2:59pm

Guys, please read the readme.md and /boot/uEnv.txt for examples on how
to disable the "hdmi/emmc"..

https://github.com/beagleboard/bb.org-overlays/blob/master/readme.md

under: "BBB compatibility issues"

There are also other combinations listed in /boot/uEnv.txt

Regards,

bremenpl · October 13, 2015, 3:00pm

Hi, I have followed this link: beagleboard/bb.org-overlays It doesnt say it in there, but after the steps with update_kernel.sh, you have to clone the directory and go into it for the next steps.

Lee_Armstrong · October 13, 2015, 3:01pm

Thanks Robert,

I am simply trying to enable UART4 which I didn’t think needed anything disabling though?

Lee

RobertCNelson · October 13, 2015, 3:05pm

in /boot/uEnv.txt

cape_enable=bone_capemgr.enable_partno=BB-UART4

and reboot.

(this is assuming /lib/firmware/BB-UART4-00A0.dtbo is installed)

Regards,

Lee_Armstrong · October 13, 2015, 3:09pm

Thanks Robert,

BB-UART4-00A0.dtbo is present in /lib/firmware. I’ve not had an issue before but this is a freshly flashed Jessie BBB.

dmesg shows the following which is the same error as per the first post when echoing into the slots.

[ 4.968908] __of_adjust_tree_phandle_references: Could not find target property ‘fixup’ @/local_f
ixups
[ 4.979738] bone_capemgr bone_capemgr: slot #4: Failed to resolve tree
[ 4.987236] bone_capemgr bone_capemgr: loader: failed to load slot-4 BB-UART4:00A0 (prio 0)

RobertCNelson · October 13, 2015, 3:17pm

That means you have the wrong dtc compiler..

You need to re-do step 2 & 3:

https://github.com/beagleboard/bb.org-overlays/blob/master/readme.md

(i just updated the readme.md to make it more useful... (i think..))

Regards,

Lee_Armstrong · October 13, 2015, 3:20pm

Thanks Robert,

I’ve just reflashed it again with the latest Jessie image and will run through those steps.

One thing not 100% clear in the steps is the best location to get the latest (patched) DTC, there are many differing sources it seems!

Lee

RobertCNelson · October 13, 2015, 3:22pm

I moved the "./dtc-overlay.sh" script right after the "check dtc" in
step 2... I'm hoping it should be more obvious to run it..

Regards,

Lee_Armstrong · October 13, 2015, 4:51pm

Robert,

Yes that is much better thank you. Working well now

Thank you very much,

Lee

tteague · October 19, 2015, 1:42am

Robert, I have the same question about the source of DTC 1.4.1-gXYZXYZXYZ - I installed the device-tree-overlay package into a new build (Linux beaglebone 4.1.10-bone-rt-r16 #1 Sun Oct 4 09:05:14 UTC 2015 armv7l GNU/Linux) and checked the version of dtc. It was v1.4.0. I tried running ./dtc_overlay.sh, but the version didn’t change. So, I cloned the git repository of the source at devicetree.org, did a make and make install. The version is still 1.4.0. The only reference Google has to the string in your readme (DTC 1.4.1-gXYZXYZXYZ) points to your readme.

Thank you
Tim

RobertCNelson · October 19, 2015, 2:07am

It's installed too:

/usr/local/bin/

https://github.com/beagleboard/bb.org-overlays/blob/master/dtc-overlay.sh#L56

If it doesn't work, your PATH is mangled..

Regards,

William_Hermans · October 19, 2015, 3:38am

http://www.embeddedhobbyist.com/2015/09/beaglebone-black-updating-device-tree-files/