[yocto] [meta-raspberrypi] how to customize kernel config?

[Andrei Gherzan]

Hi Jonatan,

Did you managed to try Alex's patch? https://review.gherzan.ro:8443/#/c/106/
Your feedback would be helpful.

Thanks,

On Thu, Jun 12, 2014 at 09:47:17PM +0100, Alex J Lennon wrote:
>
> On 12/06/2014 07:48, Jonatan Magnusson wrote:
> > Hi
> >
> > I’m trying to use the meta-raspberrypi BSP with Yocto (1.6, Daisy).
> >
> > It works great, except I have no idea how to use a custom kernel config!
> >
> > I have a custom kernel recipe that bbappends to the meta-raspberrypi kernel recipe.
> >
> > I’ve tried using defconfig as well as configuration fragments, but neither work.
> >
> > I’ve also tried using the kernel_configure_variable function, and that almost works, except if I try to disable an option that is enabled earlier in the the config file, the option is still enabled since kernel_configure_variable only appends to the config file.
> >
> > Example:
> >
> > do_configure_append() {
> >   kernel_configure_variable SPI_SPIDEV n
> > }
> >
> > So I wonder: how is this supposed to work?
> >
> > In my case I need to enable CONFIG_IEEE802154_MRF24J40 and it’s dependencies and disable CONFIG_SPI_SPIDEV and a few more.
> >
> > I’ve found no help on IRC and all Google comes up with is this old discussion, which does not lead to a solution:
> >
> > https://lists.yoctoproject.org/pipermail/yocto/2013-November/017113.html
> >
> > I would be very happy to get any hints on how this is supposed to work!
>
> Jonatan,
>
> I have a patch set here which I believe will enable configuration
> fragment support (yocto-ization) for the RPi as detailed in the Yocto
> Kernel Development Manual.
>
> It needs more testing before I would be comfortable releasing it, and I
> am short of time right now. The kernel builds and my testing shows that
> the config and config. fragments seem to get picked up, but I haven't
> tested on a board yet as I have run into trouble moving up from Yocto
> daisy to master.
>
> I wonder if you would be interested in taking a look at it with me?
> If/when it worked/works you should be able to simply add a foo.cfg file
> with your CONFIG_foo to SRC_URI in a .bbappend and that should get
> pulled in as you need.
>
> Cheers,
>
> Alex
>
>
> Cheer
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--
Andrei Gherzan