i.MX ProcessorsのトピックRe: Yocto - Add functionality without recompiling all kernel - (modules ?)

Yocto - Add functionality without recompiling all kernel - (modules ?)

maximedutres — Tue, 14 Nov 2017 17:10:42 GMT

Hi,

I'm currently working on i.MX28 with a linux kernel generated by Yocto project.

I noticed that I can activate some functionnalities of kernel with this specific config file :

meta-*****\recipes-kernel\linux\linux-fslc\mxs\defconfig

For example, I've changed

# CONFIG_CAN_BCM is not set

CONFIG_CAN_BCM=y

I recompile linux kernel with following command

bitbake -C fetch virtual/kernel

and it activates BCM protocol for CAN bus.

I would like to know if it is possible to add this BCM protocol without recompiling all kernel.

I've heard kernel modules could do that, but I'm totally novice to that.

Thank you in advance if you could help me.

Re: Yocto - Add functionality without recompiling all kernel - (modules ?)

maximedutres — Wed, 15 Nov 2017 13:46:35 GMT

In case someone is interested, I finally manage to do it.

By replacing

CONFIG_CAN_BCM=y

with

CONFIG_CAN_BCM=m

and generating kernel, I was able to find my module can-bcm.ko in an generated archive named modules-***.tgz.

Then, by doing following command in a linux kernel not equiped with BCM protocol, it finally enables it :

insmod can-bcm.ko

Re: Yocto - Add functionality without recompiling all kernel - (modules ?)

Carlos_Musich — Wed, 15 Nov 2017 15:23:34 GMT

Hi Maxime,

thank you very much for sharing your solution.

Regards,
Carlos

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