[PATCH 2/2] powerpc/85xx: p1022ds: enable monitor switching via pixis indirect mode

Scott Wood scottwood at freescale.com
Fri Nov 18 09:45:58 EST 2011


On Thu, Nov 17, 2011 at 04:28:48PM -0600, Timur Tabi wrote:
> Scott Wood wrote:
> 
> > As we discussed earlier, you could have a kernel boot parameter that
> > indicates what mode you'd like the localbus to run in.  Then, platform
> > code could update the device tree before any drivers bind.
> 
> How do I update the device tree from platform code?

prom_update_property()

Or, since you shouldn't be declaring these devices directly under a
simple-bus node, selectively probe the devices that are accessible.

> > Or, have U-boot set up the desired mode before entering the kernel, and
> > provide an appropriate device tree.
> 
> I can both of these features, but not in this patch.

This patch is the one that is adding a switch to indirect mode.  You're
adding it to the wrong place (it shouldn't be in a function called by the
DIU driver), so it is relevant to this patch.

-Scott



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