How to get rid of cape-universal in kernel 4.14?

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1

I’m testing kernel

`
$ uname -a
Linux arm 4.14.54-ti-r63 #1 SMP PREEMPT Thu Jul 12 21:26:13 UTC 2018 armv7l GNU/Linux

`

and I want to disable the cape-universal stuff. Regardless what I configure in /boot/uEnv.txt, I always get a message in

`
$ dmesg | grep univ
[ 1.124019] gpio-of-helper ocp:cape-universal: ready

`

and the folder

`

ls -l /sys/devices/platform/ocp/ocp:cape-*

insgesamt 0
lrwxrwxrwx 1 root root 0 Aug 11 08:26 driver → …/…/…/…/bus/platform/drivers/gpio-of-helper
-rw-r–r-- 1 root root 4096 Aug 11 08:26 driver_override
-r–r--r-- 1 root root 4096 Aug 11 08:26 modalias
lrwxrwxrwx 1 root root 0 Aug 11 08:26 of_node → …/…/…/…/firmware/devicetree/base/ocp/cape-universal
drwxr-xr-x 2 root root 0 Aug 11 08:26 power
-r–r--r-- 1 root root 4096 Aug 11 08:26 status
lrwxrwxrwx 1 root root 0 Aug 11 08:26 subsystem → …/…/…/…/bus/platform
-rw-r–r-- 1 root root 4096 Aug 11 08:26 uevent

`

is full of that cape-universal stuff.

How to get rid of that?

Note: I’m sure that I’m working on the right partition, since there is only one mounted.

2

Sure, open /boot/uEnv.txt and comment out:

enable_uboot_overlays=1

->

#enable_uboot_overlays=1

Regards,

3

Hi Robert!

I need to load a custom cape.

Regards

4

Well here is the changes you need to do to your custom cape, to be
fully compatible with "ocp:cape-universal" today...

All the pin's you utilized must be "disabled" in the cape-universal node:

https://github.com/beagleboard/bb.org-overlays/commit/5741f63c1ee922333dca02d9763edae03d477c96

If you don't like that, you can also remove the trigger file:

sudo rm /boot/dtbs/`uname -r`/am335x-boneblack-uboot-univ.dtb

But you'll still have the "ocp:cape-universal" node, as P9_19/P9_20 is
exported by this (i2c by default, but you can enable can on them)

To remove that last one:

enable_uboot_overlays=1

->

#enable_uboot_overlays=1

Regards,

5

Thanks, Robert!

Hi Robert!

I need to load a custom cape.

Well here is the changes you need to do to your custom cape, to be
fully compatible with “ocp:cape-universal” today…

All the pin’s you utilized must be “disabled” in the cape-universal node:

https://github.com/beagleboard/bb.org-overlays/commit/5741f63c1ee922333dca02d9763edae03d477c96

No way!

If you don’t like that, you can also remove the trigger file:

sudo rm /boot/dtbs/uname -r/am335x-boneblack-uboot-univ.dtb

But you’ll still have the “ocp:cape-universal” node, as P9_19/P9_20 is
exported by this (i2c by default, but you can enable can on them)

That worked! It saved about 5 seconds boot time and a lot an memory!

To remove that last one:

enable_uboot_overlays=1

→

#enable_uboot_overlays=1

Regards,

And what is that symbol for?

`
enable_uboot_cape_universal=1

`

Does it have any function “today …”? Why isn’t trigger file import controlled by this variable?

Regards