On 07/25/2013 02:53 PM, Ben Hutchings wrote:

On Thu, Jul 25, 2013 at 04:32:28PM -0400, Jason Cooper wrote:
[...]

quoted

One of the things I've been trying to square up in my head is how to
retain the history of the binding when moving to the new tree.  My
current idea was to clone the kernel tree, add one patch deleting
everything but the bindings and dts files, and one more patch moving
things where we want them (arch/{powerpc,arm}/boot/dts -> dts).

Then, as needed, we could merge a kernel version tag and delete
everything we don't need (code) in the merge commit.

The downside of this is it would be messy, the upside is that we could
closely track the kernel tree (until the bindings and dts are moved
out), and retain the history of the bindings and dts files.

[...]

It's *extremely* messy, but 'git filter-branch' might help to make a
clean tracking branch preserving history of just DT files.  David
Woodhouse did something like that for the linux-firmware repo
initially.

Ian Campbell is already working on exactly this solution:
https://lkml.org/lkml/2013/7/23/547