topic Re: Interactive kernel configuration in i.MX Processors

Interactive kernel configuration

lpenama — Sun, 31 Aug 2025 15:07:14 GMT

EVALUATION BOARD: i.MX 8M Plus EVK (imx8mpevk)

Host Machine: Ubuntu 22.04.5 LTS

I installed yocto project: 6.6.52-2.2.1 release

using:

$: mkdir ~/bin
$: curl http://commondatastorage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
$: chmod a+x ~/bin/repo
$: PATH=${PATH}:~/bin
then:
$: mkdir 6.6.52-2.2.1
$: cd 6.6.52-2.2.1
$: repo init -u https://github.com/nxp-imx/imx-manifest -b imx-linux-scarthgap -m imx-6.6.52-2.2.1.xml
$: repo sync

then:
$: MACHINE=imx8mpevk DISTRO=fsl-imx-xwayland source ./imx-setup-release.sh -b bld-xwayland

$: bitbake imx-image-full

Then flashed to imx8mpevk using UUU utility succesfuly

I noticed that wifi drivers were not installed.

AW-CM276MA (NXP 88W8997): Wi-Fi®
5 (802.11ac) 2 x 2 dual-band (2.4/5
GHz) and Bluetooth® 5.1

So I'm trying to installed them using the:

bitbake linux-imx -c menuconfig

I was able to locate the drivers and enable them, and save a .config with the GUI tool (see image attached). However I'm stock in how to apply this changes and bake the new image.

I'm trying to follow

RM00293
i.MX Linux Reference Manual
Rev. LF6.12.20_2.0.0 — 26 June 2025

but it is really confusing, I would really appreciate any help with this

Re: Interactive kernel configuration

coulomz — Sun, 31 Aug 2025 16:57:04 GMT

Hello,

You can check this link by variscite that shows how to configure the kernel on their boards. For you the difference should only be the layer names, but the baseline is:

After making you changes run

bitbake -c savedefconfig virtual/kernel

to save the changes in a defconfig format

Find the layer that contains the linux kernel, should be meta-imx-bsp/recipes-kernel/linux
Create a files directory in there
Copy the defconfig to the files directory
Create a .bbappend file that points to the defconfig

Re: Interactive kernel configuration

Harvey021 — Mon, 01 Sep 2025 08:43:07 GMT

The WiFi driver for Full image should be already included. You can refer to the UM11483 about how to bring up WiFi. The path to driver should be as like

./usr/lib/modules/6.12.3-lts-next-g37d02f4dcbbe/updates/moal.ko

And to how to apply, you can refer to the section <2.1.2 How to build and load Kernel in Yocto Project> of Porting Guide

Regards

Harvey