Re: [Buildroot] [PATCH 2/4] package/k3-image-gen: new package

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

Hello,

On Tue, 26 Jul 2022 15:56:31 -0500
Xuanhao Shi <x-shi@ti.com> wrote:

> > Could you explain what you are trying to do? Is it because you need to
> > build two different U-Boot configurations?
> 
> Yes, the R5 core requires a different U-Boot build than the A53 core. I 
> mentioned a bit about it above.
> 
> I understood that this patch currently does not achieve that in a proper 
> way. Would you mind recommending a proper way to do this? Should I find 
> a way to patch U-Boot directly so it has an option for a separate build?
> 
> Since you mentioned earlier that k3-image-gen should be a package in 
> boot/, should the patch modify boot/uboot/ for the separate U-Boot build 
> instead?

One option that I see, which isn't very nice, is to do like Barebox in
boot/barebox/, where boot/barebox/barebox.mk contains most of the code,
but in fact two barebox packages exist, boot/barebox/barebox/ and
boot/barebox/barebox-aux/.

Another option, much simpler, is to do something that is more TI
specific, such as a ti-am64x-r5-loader package that would download your
U-Boot for R5 and build it, but without relying on the boot/uboot/
package. Exactly like if you had a custom bootloader/firmware for the
R5. I think this is the best option.

What do you think?

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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