[PATCH] ARM: imx: do not bring up unavailable cores

[Shawn Guo]

On Wed, Apr 03, 2013 at 08:01:02AM -0500, Rob Herring wrote:
> On 04/02/2013 10:18 PM, Fabio Estevam wrote:
> > On Tue, Apr 2, 2013 at 11:47 PM, Shawn Guo <shawn.guo at linaro.org> wrote:
> > 
> >> Ah, great.  I haven't checked the U-Boot code for some time.  But does
> >> U-Boot remove cpu nodes of those unavailable cores from device tree
> >> before passing it to kernel?
> > 
> > No, it just uses the information from the SCU to print the name of the
> > mx6 variant on boot.
> 
> It is quite common and the correct place IMHO to do this dtb fixup in
> u-boot.

Yes, I agree.

> You can just add 'status = "disabled";' properties. I'm not sure
> that the kernel is checking the status though.
> 
No, I do not think that kernel is current checking property 'status'.

> Reading the core count from the SCU is the only reason the SCU needs to
> be statically mapped, so if you remove that you can remove the static
> mapping.

Yea, that's something desirable.  We can do that after both u-boot and
kernel get ready to manipulate 'status' property of cpu node.

Shawn