Re: case sensitivity for devicetree node names

On 06/11/16 15:05, Benjamin Herrenschmidt wrote:

On Sat, 2016-06-11 at 12:38 -0700, Frank Rowand wrote:

quoted

I chased through the history and found a 2.6.0-test5 announcement
which noted the patch from you which adds:

  of_find_node_by_path()
  of_find_node_by_name()
  of_find_node_by_type()
  of_find_compatible_node()

(And the patch is commit 394edd852a14 in the git recreation
of bitkeeper days, which is found at
git://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git)

That version of the functions uses a case insensitive compare for
devicetree node names.

Do you remember why you chose to not use a case sensitive compare?

quoted

From memory, there were inconsistency in case on various earlier

machines (notably old macs). I think that's the main reason.

Cheers,
Ben.

Is there a kernel config option (or a small set of config options)
that would identify the affected machines?  It would be ok if
the option(s) also included some non-affected machines.  That
way we could use the case insensitive compare for a small
set of machines.