[PATCH 8/9 V3] Add documentation for the new DTS language.

[Jon Loeliger]

On Thu, 2008-10-02 at 13:50 -0600, M. Warner Losh wrote:
> In message: <20081002152242.GB22258 at ld0162-tx32.am.freescale.net>
>             Scott Wood <scottwood at freescale.com> writes:
> : On Thu, Oct 02, 2008 at 11:18:00AM +1000, David Gibson wrote:
> : > > I vote against anything similar to the C preprocessor.
> : > 
> : > Why?
> : 
> : It's not nearly as powerful as the semantic approach, and it is
> : syntactically clumsy (I do *not* want to have to put a backslash at the
> : end of every line within a macro, for example).
> 
> And there are no looping constructs at all in CPP.  You flat out can't
> do a generalized for loop with the macro language, for example.  Its
> symbols also do not map 1-1/onto symbols used by the dts files.  It
> can only grok macros you define for it, so it has no way of knowing
> many useful things that dts just knows.
> 
> Basically, it is using a hammer to pound screws in.  Sure, it seems to
> work, but the results are shoddy.
> 
> Warner

Also, it  might be worth noting that if one uses "-I dts -O dts"
with my patch set, it is pretty-darn similar behavior to a simple
pre-processing pass that simply expands the original constructs
into a flat DTS file like we have today.

jdl