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Petalinux 2024.1 Build Error for Ultra96-V2 with WILC Driver on Kernel 6.8.0

agingwarrior

Hello,
I'm working on a Petalinux project with the Ultra96-V2 board on kernel version 6.8.0 (Ubuntu 22.04 LTS), using Petalinux 2024.1. I've set up my project using the steps listed below:

cd ~
mkdir Avnet_2024_1
cd ~/Avnet_2024_1
git clone https://github.com/Avnet/bdf
git clone -b 2024.1 https://github.com/Avnet/hdl
git clone -b 2024.1 https://github.com/Avnet/petalinux

Then I initiate the build with:

cd ~/Avnet_2024_1/petalinux
scripts/make_u96v2_sbc_base.sh


I encountered build errors with the WILC driver in `bt.c` and `power.c` files. The errors seem to be related to deprecated functions that are incompatible with the latest kernel. Specifically, the following issues arise:

1. Error with `class_create`:
   - Error: `too few arguments to function 'class_create'`
   - It seems the function signature has changed in newer kernels, requiring an explicit owner argument.

2. Error with `of_get_named_gpio_flags`:
   - Error: `implicit declaration of function ‘of_get_named_gpio_flags’`
   - This function appears to be deprecated in favor of `gpiod` (GPIO descriptor) APIs.

I tried manually updating the code to address these compatibility issues, such as replacing `of_get_named_gpio_flags` with `gpiod_get`. However, I’m still unsure if I’m implementing this correctly, and I'm looking for guidance on how best to adapt the WILC driver for compatibility with the 6.8.0 kernel.

Has anyone faced a similar issue with the WILC driver on Ultra96-V2 or with recent kernel updates? Any advice or solutions would be greatly appreciated! I am able to complete the build if the wilc driver is removed from the petalinux build list.

Thanks in advance for your help!

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  • 0

    In Linux kernel 6.x, class_create has changed, and an additional THIS_MODULE parameter is now required to specify the module owner. This should be a straightforward change:

    Original code: 

    struct class *my_class = class_create("my_class");

    Updated code:

    struct class *my_class = class_create(THIS_MODULE, "my_class");

    Updating this to add THIS_MODULE as the first argument should resolve the “too few arguments” error. Make sure this change is implemented wherever class_create is invoked.

  • 0 in reply to bidrohini

    Hi,

    Thanks for your guidance on the class_create issue. I'm new to Petalinux and still getting familiar with the specifics of the code and its structure. I'm not entirely sure where to implement the change you suggested or how to go about it.

    Could you please provide some more details on where to look for the class_create calls in my project? Any specific files or sections in the code that I should focus on would be really helpful.

    Thanks again for your support!

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  • 0 in reply to bidrohini

    Hi,

    Thanks for your guidance on the class_create issue. I'm new to Petalinux and still getting familiar with the specifics of the code and its structure. I'm not entirely sure where to implement the change you suggested or how to go about it.

    Could you please provide some more details on where to look for the class_create calls in my project? Any specific files or sections in the code that I should focus on would be really helpful.

    Thanks again for your support!

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