[PATCH 0/3] patches to allow DTB to be appended to the ARM zImage

Tony Lindgren tony at atomide.com
Wed Jun 15 04:08:21 EDT 2011

* Grant Likely <grant.likely at secretlab.ca> [110614 15:02]:
> On Tue, Jun 14, 2011 at 3:42 PM, Arnd Bergmann <arnd at arndb.de> wrote:
> > On Tuesday 14 June 2011 23:21:52 Nicolas Pitre wrote:
> >> Otherwise, if the revision number is effectively non probable, then I
> >> would guess it is the device tree's purpose to carry that information
> >> somehow, right?  Maybe this can be appended to the board name string?
> >
> > That's what I meant with adding it to "compatible", which is a list of
> > strings with varying degrees of detailed information, e.g.
> >
> >  ti,omap7
> >  ti,omap7-squirrelboard
> >  ti,omap7-squirrelboard-v3
> >  ti,omap7-squirrelboard-v3.17b
> >
> > You can match the list against a specific revision or a less specific
> > identifier if you just want to know whether you are on a squirrelboard
> > or a hamsterboard.
> Yes, that's generally the right way to handle it.  In practice I've
> not seen many cases where it is really required, but it doesn't hurt
> if somebody wants to include it in the DT for their board.

Appending the ATAG_REVISION to "compatible" and also setting system_rev
to ATAG_REVISION like we already do should work.

Just to clarify things abit: We just can't generate .dts files for all
existing hardware. It would require dumping out system_rev and other ATAGs
on tens or hundeds of pieces of hardware.



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