[PATCH] ARM/sp810: introduce API to change system mode

[Russell King - ARM Linux]

On Mon, Feb 27, 2012 at 11:38:14AM +0100, Linus Walleij wrote:
> Maybe I'm delusional but I think this could help centralizing the use
> of the SP* cells, since they're obviously used in both SPEAr and
> versatile express.

They can be used in any PrimeXsys based system, and I don't see that
there's anything which guarantees having both a SP810 and SP804
together.

There are platforms which have SP804 without SP810 - Integrator CP
and bcmring seem to fall into that category.

But... the register concerned does a whole load of other things, and
I'm not sure we want to have accesses to it de-centralized.