[RFC PATCH 0/3] ARM: use C pre-processor with dtc
Scott Wood
scottwood at freescale.com
Wed Sep 26 05:59:11 EST 2012
On 09/25/2012 02:51:27 PM, Mark Brown wrote:
> On Tue, Sep 25, 2012 at 02:35:46PM -0500, Scott Wood wrote:
>
> > Do you have an example of where you'd actually benefit from this?
> > I'd think most things could either be done reasonably well with
> > what's built into DTC (see what we've done in
> > arch/powerpc/boot/dts/fsl), or would need math expression support in
> > DTC (or has that been added?).
>
> The constant example is the magic numbers we need to embed into DTs
> for
> things like interrupt modes, making them human readable would be a
> real
> win.
Wasn't there a patch for named constant support in dtc a while back?
Hmm:
https://lists.ozlabs.org/pipermail/devicetree-discuss/2012-January/011184.html
I'm not sure that going down the CPP path is better than the
possibility of named constants having a different syntax from
macros/functions. It would be one thing if someone were actively
working on the latter, but this paralysis seems to be a case of the
perfect being the enemy of the good.
-Scott
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