topic Re: Add Kernel Modules in the core-image-minimal in i.MX Processors

Add Kernel Modules in the core-image-minimal

abelussi — Fri, 16 Mar 2018 15:07:15 GMT

How can I add the modules of kernel in the core-image-minimal filesystem ?

We tried with :

CORE_IMAGE_EXTRA_INSTALL += " kernel-modules" in the local.conf

and

MACHINE_EXTRA_RRECOMMENDS = " kernel-modules" in the machine.conf

But in both cases we didn't find the modules.

We had to install by rpm.

Thanks in advanced

Re: Add Kernel Modules in the core-image-minimal

Carlos_Musich — Fri, 16 Mar 2018 22:32:40 GMT

Hi Antonio,

please see following posts:

how to cross-compile a external module based on imx yocto files?

imx6ul: Yocto toolchain can't build kernel modules

How ever I prefer to Create Meta-toolchain and rebuild zImage outside of Yocto and just replace zImage.

Regards,
Carlos
NXP Technical Support
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Re: Add Kernel Modules in the core-image-minimal

henrideveer — Tue, 14 May 2019 13:47:18 GMT

This does not answer the question, it another subject (cross compilation from a SDK)?

The real question is (as I expect) is how to get a kernel module, which is marked with 'm' in the kernel config, in the /lib directory from the regular yocto build in the rootfs /lib/... directory.

In the yocto morty release I could add this in the image recipe (.bb):

IMAGE_INSTALL += "kernel-module-<the-module>"

But in the sumo release this does not work any more.

(Based on core-image-minimal)

Re: Add Kernel Modules in the core-image-minimal

radhikasomaiya — Fri, 17 May 2019 10:19:52 GMT

Hi, Antonio Belussi‌

We are able to get kernel modules in lib directory from yocto core-image-minimal based file system by adding only below the line in conf/local.conf file.

CORE_IMAGE_EXTRA_INSTALL += " kernel-modules"

There is no need to add MACHINE_EXTRA_RRECOMMENDS = " kernel-modules" in the machine configuration file.

After that, we did bitbake core-image-minimal and we are able to see modules in the lib directory. We have also checked in yocto krogoth, morty and sumo as well.

Let us know if you are still facing an error with this solution.

Regards,

Re: Add Kernel Modules in the core-image-minimal

henrideveer — Fri, 17 May 2019 11:12:16 GMT

I fixed it in another way. In the image recipe I added the kernel module as follow:

IMAGE_INSTALL_append += "\

kernel-module-<the-module> \

.. all other packages ..

Why this does not work, beats me, it should do the same:

IMAGE_INSTALL += "kernel-module-<the-module>"

I think adding it to the "image recipe" is more clean iso using the local.conf (which I dislike to put anything in, except the bare minimum).

Re: Add Kernel Modules in the core-image-minimal

marcocavallini — Thu, 01 Jul 2021 10:29:44 GMT

kernel-modules is just a package, so you can include it in IMAGE_INSTALL just
like any other package name (although this may not be the most appropriate
solution), alternatively, add them to MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS.

IMAGE_INSTALL_append = " kernel-modules"

MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS_append = " kernel-modules"