[PATCH u-boot 0/1] RFC: How to configure boot options?

[Patrick Williams]

On Mon, Jul 24, 2017 at 11:19:52AM -0700, Rick Altherr wrote:
> The current bootcmd script is there to provide backward compatibility for
> pre-FIT ramdisks.  That can probably be removed but we now want fallback
> behavior for images that still use a ramdisk.

Thanks for giving me the history on that BOOTCOMMAND snippet.  It wasn't
obvious what it was doing to me.

Agreed.  It seems a little odd to me that this is all controlled in the
u-boot repository directly, hence my questions.  I would have expected
that an IMAGE_FEATURE or MACHINE_FEATURE of Yocto would have triggered
FIT vs non-FIT.  Same now with the transition to UBI with kernel and
squashfs instead of distinct MTD devices.

> 
> On Fri, Jul 21, 2017 at 3:33 PM, Patrick Williams <patrick at stwcx.xyz> wrote:
> 
> > As part of the change-over from an initramfs-based boot sequence to a
> > direct rootfs boot, we need to change some of the boot options for
> > u-boot.  I expect these to change a few times in the near future as we
> > also transition to UBI-managed volumes and we figure out how to set
> > u-boot environment options to switch between different UBI kernels and
> > rootfses.
> >
> > This is really independent from the current ast-*-defconfigs, in that
> > those currently select between different network options.  I suspect
> > we do not N*M combinations of defconfigs for network*image-structure.
> > I plan to make a MACHINE_FEATURE (or DISTRO_FEATURE) in bitbake to
> > control this, but looking for feedback on how we should change u-boot.
> >
> > Ideally, to me, this would have been passed in via the config file and
> > we could have used config-snippets in Yocto like we do for the kernel.
> > Due to the way u-boot builds, I could not find a simple way to even
> > change this option from a include/config/ast-common.h #define into a
> > machine_config driven option.
> >
> > Anyone have ideas?
> >
> > Patrick Williams (1):
> >   config/ast-common: hack bootopts
> >
> >  include/configs/ast-common.h | 6 ++++++
> >  1 file changed, 6 insertions(+)
> >
> > --
> > 2.13.0
> >
> >
> >

-- 
Patrick Williams
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