[RFC PATCH dtc] C-based DT schema checker integrated into dtc

[Stephen Warren]

On 10/25/2013 12:43 AM, Grant Likely wrote:
> On Thu, 24 Oct 2013 22:51:28 +0100, Stephen Warren <swarren at wwwdotorg.org> wrote:
>> From: Stephen Warren <swarren at nvidia.com>
>>
>> This is a very quick proof-of-concept re: how a DT schema checker might
>> look if written in C, and integrated into dtc.
> 
> Thanks for looking at this.
> 
> Very interesting. Certainly an expedient way to start checking schemas,
> and for certain bindings it may be the best approach. The downside is it
> forces a recompilation of DTC to bring in new bindings and it isn't a
> great meduim for mixing schema with documentation in the bindings.

This approach would certainly require recompiling something. I threw the
code into dtc simply because it was the easiest container for the
demonstration. It could be a separate DT validation utility if we
wanted, although we'd need to split the DT parser from dtc into a
library to avoid code duplication. The resultant utility could be part
of the repo containing the DTs, so it didn't end up as a separate
package to manage.

I think the additional documentation could be added as comments in the
validation functions, just like IIRC it was to be represented as
comments even in the .dts-based schema proposals.