Continued need for ATAGS-based booting?

[Tom Rini]

On Tue, Sep 16, 2025 at 05:37:47PM +0300, Svyatoslav Ryhel wrote:
> вт, 16 вер. 2025 р. о 17:30 Tom Rini <trini at konsulko.com> пише:
> >
> > On Tue, Sep 16, 2025 at 12:05:58PM +0300, Svyatoslav Ryhel wrote:
> > > пн, 15 вер. 2025 р. о 23:38 Tom Rini <trini at konsulko.com> пише:
> > > >
> > > > As part of working on cleaning up documentation, I ended up seeing just
> > > > how few boards still enable support for ATAGS-based OS booting. In fact,
> > > > the list is:
> > > > brcp150 brcp170 brcp1_1r brcp1_1r_switch brcp1_2r brsmarc2 chagall
> > > > dockstar dreamplug ds109 ds116 ds414 endeavoru goflexhome grouper
> > > > icnova-a20-swac iconnect ideapad-yoga-11 lschlv2 lsxhl mocha mot n1
> > > > n2350 nsa310s nsa325 openrd_base openrd_client openrd_ultimate ouya
> > > > picasso pogo_e02 pogo_v4 qc750 sheevaplug star stemmy surface-2
> > > > surface-rt tegratab tf701t transformer_t20 transformer_t30 x3_t30
> > > >
> > > > And my question is, for you board maintainers, do you still need to
> > > > actively support booting such old Linux kernels? Or can we disable this
> > > > support and then possibly be able to remove the underlying code as well.
> > > > Thanks!
> > > >
> > > > --
> > > > Tom
> > >
> > > Hello Tom!
> > >
> > > Maintainers of some boards in interest have agreed that support for
> > > ATAGS-based OS booting can/should be removed from the boards in the
> > > following list:
> > > chagall endeavoru grouper ideapad-yoga-11 mocha mot n1 ouya picasso
> > > qc750 star surface-2 surface-rt tegratab tf701t transformer_t20
> > > transformer_t30 x3_t30
> > >
> > > Thank you for your support! Have a nice day.
> >
> > That's good. Are you going to submit a patch for the defconfigs or
> > should I?
> >
> 
> I can submit but that will not be too soon since I am quite occupied
> with Linux kernel stuff right now. I'll try to cut some time for this
> till the end of the week. Since there are still boards relying on
> ATAGS I assume this change is not urgent.

Yes, it's not an urgent need, I just hope to be able to turn this off
for more platforms with the v2026.01 release, given the confirmation
that some platforms *will* need to continue to use it.

-- 
Tom
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