Re: DT case sensitivity

On 23/08/2018 02:29, Benjamin Herrenschmidt wrote:

On Wed, 2018-08-22 at 20:26 -0500, Rob Herring wrote:

quoted

On Wed, Aug 22, 2018 at 8:14 PM Benjamin Herrenschmidt
[off-list ref] wrote:

quoted

On Wed, 2018-08-22 at 19:47 -0500, Rob Herring wrote:

quoted

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 differe=

nt?

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.

quoted

quoted

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What PPC systems are case insensitive? Can we limit that to certain sy=

stems?

quoted

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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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