device vcio is missing in aarch64

[capthookb]

Hello,
I have a raspberry pi 4 and I have installed aarch64
[code]
uname -a
Linux rasp 6.9.12-2-aarch64-ARCH #1 SMP PREEMPT_DYNAMIC Sat Jul 27 13:48:15 MDT 2024 aarch64 GNU/Linux
[/code]

I know that the aarch64 does not support the closed source libraries. I am trying to run the vcgencmd as root, and i get:
[code]
#vcgencmd
Can't open device file: /dev/vcio
Try creating a device file with: sudo mknod /dev/vcio c 100 0
[/code]

Is this something that I would expect in aarch64, or am I missing something?

[graysky]

The linux-aarch64 kernel ships the vanilla kernel. If you want Pi-specific stuff you will need to use the linux-rpi kernel which ships the RPi Foundations fork of the linux kernel.

[capthookb]

Thank you graysky for the prompt response!

[lategoodbye]

Hi capthookb,

could you please tell, why do you need vcgencmd?

[jmarro]

Hello! Just comment that I am in the same situation reported by capthookb.
In my case, I try to use vcgencmd in order to get information about the device tree which is really in force in this device... I am having a quite hard time trying to setup a "letstrust" TPM module, and I want check de device tree configuracion in order to try to isolate where my problem is.

... also, some time ago, I also tried to use de vcgencmd in order to get the voltage levels, which is also quite an issue in raspeberries, and unfortunatelly I was not able (same problem), but in that case, it was not really a problem for me.

It would be nice if vcgencmd were available.

Regards
Josep

[graysky]

See my reply above re: differences in kernel packages. Also:
% pkgfile vcgencmd
alarm/raspberrypi-utils

[jmarro]

Hello Graysky,
you are right. Thank you
Regards