Support iot-gate-imx8plus in Kernel 6.6(.23)

[pbilstein]

Hi,

we would like to build a newer kernel for our iot-gate-imx8plus. Is it possible to add support for it in 6.6(.23)?

Another question to be clear: I want to use this kernel in the debian variant. Is this possible?

Kind regards Peter

[vraevsky]

Hi,

What do you call debian variant?

Regards, Valentin.

[pbilstein]

Hi,

I'm using the debian image for the imx8plus from here and followed this link which I found on the debian documentation to update the kernel.

Regards, Peter

[vraevsky]

Hi,

6.6.23 is already there: https://github.com/compulab-yokneam/linux-compulab/tree/linux-compulab_v6.6.23

Deployment procedure is here: https://github.com/compulab-yokneam/Documentation/blob/master/etc/linux_kernel_deployment.md

Regards, Valentin.

[pbilstein]

Hi,

I followed the build guide, but I get the following error:

$ export MACHINE=iot-gate-imx8plus
$ make ${MACHINE}_defconfig compulab.config
  YACC    scripts/kconfig/parser.tab.[ch]
  HOSTCC  scripts/kconfig/lexer.lex.o
  HOSTCC  scripts/kconfig/menu.o
  HOSTCC  scripts/kconfig/parser.tab.o
  HOSTCC  scripts/kconfig/preprocess.o
  HOSTCC  scripts/kconfig/symbol.o
  HOSTCC  scripts/kconfig/util.o
  HOSTLD  scripts/kconfig/conf
***
*** Can't find default configuration "arch/arm64/configs/iot-gate-imx8plus_defconfig"!
***
make[3]: *** [scripts/kconfig/Makefile:94: iot-gate-imx8plus_defconfig] Fehler 1
make[2]: *** [Makefile:697: iot-gate-imx8plus_defconfig] Fehler 2
make[1]: *** [/home/peter/projects/neoalto/compulab-kernel/linux-compulab/Makefile:359: __build_one_by_one] Fehler 2
make: *** [Makefile:234: __sub-make] Fehler 2

So it looks like the support for iot-gate-imx8plus is missing so far. Or am I doing something wrong?

Regards Peter

[vraevsky]

Hi,

Our guide has this for all imx8mp family: export MACHINE=compulab_v8 make ${MACHINE}_defconfig compulab.config

have a look at: https://github.com/compulab-yokneam/linux-compulab/linux-compulab_v6.6.23/README.md

I'd appreciate if if you could post the link to the followed the build guide.

Regards, Valentin.

[pbilstein]

Hi,

ok I got it. I did'nt re-read the README after switching thee kernel version branch. I followed still this one:

https://github.com/compulab-yokneam/linux-compulab/blob/linux-compulab_v5.15.32/README.md

instead of the new..

https://github.com/compulab-yokneam/linux-compulab/blob/linux-compulab_v6.6.23/README.md

btw: this one gives me a 404: https://github.com/compulab-yokneam/linux-compulab/linux-compulab_v6.6.23/README.md

And I used the v5.15.32 readme which is linked here: Building IOT-GATE-IMX8PLUS Linux Kernel

Kind regards Peter

[vraevsky]

Hi,

got it too. Did yo get to build the kernel using the latest procedure?

Regards, Valentin.

[pbilstein]

Hi,

ok I was able to build the deb packages and followed the installation guide:

https://github.com/compulab-yokneam/Documentation/blob/master/etc/linux_kernel_deployment.md#debian-linux-bindeb-pkg-deployment

It says:

Install procedure:

• Copy the created packages to the device and issue dpkg -i /path/to/deb/folder/*.deb
• Mount the device boot partition.
• Copy the content of the /usr/lib/linux-image-/compulab/{.dtb,.dtbo} to the mounted boot partition.

After reboot the old kernel is loaded. Am I missing any steps?

My /boot looks like this now

/boot$ ls -lah
total 63M
drwxr-xr-x  4 root root 4.0K Nov 22 11:50  .
drwxr-xr-x 18 root root 4.0K Nov 21 20:29  ..
-rw-r--r--  1 root root 4.7M Feb 29  2024  System.map-6.1.22-3.1
-rw-r--r--  1 root root 6.3M Nov 22 09:39  System.map-6.6.36-gc758345748da
-rw-r--r--  1 root root 234K Feb 29  2024  config-6.1.22-3.1
-rw-r--r--  1 root root 241K Nov 22 09:39  config-6.6.36-gc758345748da
drwxr-xr-x  2 root root 4.0K Feb  5  2024  efi
-rw-r--r--  1 root root 1.8M Feb  5  2024  flash.bin.d1d8
-rw-r--r--  1 root root 1.8M Feb  5  2024  flash.bin.d2d4
drwxr-xr-x  5 root root 4.0K Nov 21 20:33  grub
lrwxrwxrwx  1 root root    9 Feb  8  2024  imx-boot -> /dev/null
-rw-r--r--  1 root root  19M Feb 29  2024  initrd.img-6.1.22-3.1
-rwxr-xr-x  1 root root  75K Nov 22 11:50  iot-gate-imx8plus-brkout_pwm_gpio.dtb
-rwxr-xr-x  1 root root  388 Nov 22 11:50  iot-gate-imx8plus-gpio-keys.dtbo
-rwxr-xr-x  1 root root  76K Nov 22 11:50  iot-gate-imx8plus-m2adc.dtb
-rwxr-xr-x  1 root root  76K Nov 22 11:50  iot-gate-imx8plus-m2emmc.dtb
-rwxr-xr-x  1 root root  75K Nov 22 11:50  iot-gate-imx8plus-m2tpm.dtb
-rwxr-xr-x  1 root root  75K Nov 22 11:50  iot-gate-imx8plus-usbdev.dtb
-rwxr-xr-x  1 root root  75K Nov 22 11:50  iot-gate-imx8plus.dtb
lrwxrwxrwx  1 root root    7 Nov 21 20:33 'kernel-*' -> 'Image-*'
-rw-r--r--  1 root root  14M Feb 29  2024  vmlinuz-6.1.22-3.1
-rw-r--r--  1 root root  16M Nov 22 09:39  vmlinuz-6.6.36-gc758345748da

[vraevsky]

Reboot the device, stop in U-Boot and issue: run distro_bootcmd

6.6.36 is not released and not tested yet. 6.6.23 is the latest iot validated kernel.

NOTE: Make sure that the device trees are copied to the device p1 partition. The output shows p2/boot folder.