[U-Boot] [RFC] ARM: omap3: Add option to disable errata workarounds.

[Peter Meerwald]

Hello,

> >>>> It seems that all three ARM errata workarounds done in omap3 board-init
> >>>> (#454179 #430973 #621766) are solved/not longer needed e.g. in the
> >>>> AM/DM37xx chips. Other people have noticed this:
> >>>> http://e2e.ti.com/support/arm/sitara_arm/f/791/t/254742.aspx
> >>>>
> >>>> When still applying them (especcially #430973), lots of segmentations
> >>>> faults and other strange stuff begin to appear.
> >>
> >> I read your link the other way round. If the #430973 errata fix is _not_
> >> applied to r3p2 it gives a lot of segfaults. Unfortunately the thread
> >> has noc more information on that.

#430973 is still needed on latest Cortex-A8 silicon of DM3730 according to 
my testing; this is in contradiction to what TI and ARM claim

> > I dont know what bootloader the guy used, but he states that he needs to
> > enable the errata fix in the kernel for the segfaults to disappear. I

the guy used u-boot 2012.10 and linux 3.7 :)

> > found exactly the same: Initially I had no errata fixes configured for
> > the kernel, only when I added them the segfaults disappeared.
> > However they also disappear if I remove the workarounds from kernel as
> > well as u-boot, hence this patch.

interesting; I did not consider this dependency between u-boot and 
kernel here; will try it

regards, p.

-- 

Peter Meerwald
+43-664-2444418 (mobile)