DT case sensitivity

[Grant Likely]

On 23/08/2018 02:29, Benjamin Herrenschmidt wrote:
> On Wed, 2018-08-22 at 20:26 -0500, Rob Herring wrote:
>> On Wed, Aug 22, 2018 at 8:14 PM Benjamin Herrenschmidt
>> <benh at kernel.crashing.org> wrote:
>>>
>>> On Wed, 2018-08-22 at 19:47 -0500, Rob Herring wrote:
>>>> The default DT string handling in the kernel is node names and
>>>> compatibles are case insensitive and property names are case sensitive
>>>> (Sparc is the the only variation and is opposite). It seems only PPC
>>>> (and perhaps only Power Macs?) needs to support case insensitive
>>>> comparisons. It was probably a mistake to follow PPC for new arches
>>>> and we should have made everything case sensitive from the start. So I
>>>> have a few questions for the DT historians. :)
>>>
>>> Open Firmware itself is insensitive.
>>
>> Doesn't it depend on the implementation? Otherwise, how is Sparc different?
>
> Not sure ... Forth itself is insensitive for words but maybe not for
> string comparisons.

What problem are you trying to solve? I would think making everything
case insensitive would be the direction to go if you do anything. Least
possibility of breaking existing platforms in that scenario.

g.

>
>>
>>>> What PPC systems are case insensitive? Can we limit that to certain systems?
>>>
>>> All PowerMacs at least, the problem is that I don't have DT images or
>>> access to all the historical systems (and yes some people occasionally
>>> still use them) to properly test a change in that area.
>>
>> I'm temped to break them so I can find folks to provide me with DT dumps. :)
>
> I have a collection of DT dumps but I'm not sure about the legality of
> publishing them...
>
> Cheers,
> Ben.
>
>

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