[yocto] Conditional patches on kernel depending on board, how to maintain?

[Daniel Hilst Selli]

On 06/12/2014 09:27 AM, Patrick Doyle wrote:
> Can you compile the different device drivers as modules and load them
> at runtime?
> Can you compile the different device drivers statically and probe them
> based on a devicetree file?

Yes I do compile the device drivers as modules, but yet I have to 
register the *_board_info structs on board-*.c file, here is an example:

http://pastebin.com/GMSDQERB

Thanks in advance,
Cheers!

>
> --wpd
>
>
> On Thu, Jun 12, 2014 at 7:54 AM, Daniel Hilst Selli
> <danielhilst at gmail.com> wrote:
>> I have a SoM which will be used on several boards, this SoM has a base
>> kernel for it, with its board-*.c file. In each board I may have different
>> peripherals, so I have to patch the same board-*.c file depending on my
>> target board, and that patches may be conflicting one each other. For
>> example, I could have a RF on first SPI bus on one board, and on another
>> board a SD card on same first SPI bus.
>>
>> So basically I will have a different kernel(uImage) and rootfs (with kernel
>> modules) for each board.
>>
>> I think to create a layer for each target board, with the linux-SoM.bbappend
>> including the patches for that board..., so I enable the layer depending on
>> target board I'm creating, but is too much file editions, or have a build
>> directory for each target board, enabling the right layer on each
>> local.conf, but this means mantaining build directories, or at last
>> local.conf, which doesn't seem a good idea for me...
>>
>> Would be possible to do this relying only new layers and its configurations?
>>
>> Thanks in advance
>> Cheers!
>> --
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