STM32MP1 Yocto menuconfig unable to load the drivers

Embedded Linux Discussions
1

Hello there…
I hope all are doing well

I’m Working with the Yocto project with the dunfell branch
I have the STM32MP1 dk1 board, to test the kernel

My goal is to load the drivers for the USB WiFi dongles
That’s how, I’m using menuconfig to enable the drivers and customise the kernel

Now, The problem is, after menuconfig it’s successfully generating the image but unfortunately, in custom image I’m unable to find the loadable kernel modules!

I’m flowing the tutorial provided by @ShawnHymel followed by the below URL (which is extreamly good)

How to enable WiFi networking in the Yocto Project for a custom Linux image for the STM32MP157D-DK1

From my side, the steps are as follows…

  1. Manually set the required drivers by using menuconfig GUI tool
       bitbake -c menuconfig virtual/kernel
  1. Generate the default configuration
       bitbake -c savedefconfig virtual/kernel
  • also verified the drivers, which I have set in to the menuconfiig
  • drivers exist in defconfig
  1. copy defconfig in to the custom-layer
    /meta-customer/recipes-kernel/linux/files/
  1. Updated linux-stm32mp_%.bbappend asper the default configuration

FILESEXTRAPATHS_prepend := "${THISDIR}:${THISDIR}/files:"

SRC_URI += "\
               file://0001-stm32mp157a-dk1-i2c-add-dts.patch \
               file://0002-stm32mp157a-dk1-add-ltdc-dts.patch\
               file://defconfig\
"
# Applying the default configuration


KERNEL_DEFCONFIG_stm32mp1 = "defconfig"
  1. Updated locakl.conf to load the module automatically during the boot

# Adding kernel modules for the USB WiFi drivers

IMAGE_INSTALL += "kernel-module-r8188eu \
                  linux-firmware-rtl8188 \
                  dhcp-client \
                  iw \
                  wpa-supplicant \
                  wireless-regdb-static"

# Autoload WiFi driver on boot
KERNEL_MODULE_AUTOLOAD += "r8188eu"
  1. Then i done bake the image
   bitbake core-image-minimal

Problem statement :

  1. During the building of the image, I can find the logs to build the modules, which I’d set erlear !
  2. core-image-minimal.menifest seems not updated, as i verified using grep “modules which i set”
  3. After flashing the image on sd card & booting on ab board /lib directory missing all loadable modules!
  4. Even, wpa-supplicant is not working, which i have installed with image

Guys, can you advice what’s baking wrong here! All comments & suggestions welcome

Thanks,
Mahendra Sondagar

2

Shawn has a good video series on this…

Also take a look at:

https://wiki.st.com/stm32mpu/wiki/How_to_cross-compile_with_the_Distribution_Package#modifying_kernel_configuration

Which usb device are you using? is it showing up with lsusb ?

Look in the deploy directory, there should be a list of ./kernel-module-*.ipk or similar format for your newly configured kernel wireless driver.

Regards,