[RFC PATCH V2 2/2] kbuild: dtbs_install: new make target

Stephen Warren swarren at wwwdotorg.org
Mon Nov 18 14:23:48 EST 2013

On 11/18/2013 12:19 PM, Jason Cooper wrote:
> On Mon, Nov 18, 2013 at 12:09:19PM -0700, Stephen Warren wrote:
>> On 11/18/2013 11:38 AM, Jason Cooper wrote:
>>> Unlike other build products in the Linux kernel, the devicetree blobs
>>> are simply the name of their source file, s/dts/dtb/.  There is also no
>>> 'make *install' mechanism to put them in a standard place with a
>>> standard naming structure.
>>> Unfortunately, users have begun scripting pulling the needed dtbs from
>>> within the kernel tree, thus hardcoding the dtbs names.  In turn, this
>>> means any changes to the dts filenames breaks these scripts.
>>> This patch is an attempt to fix this problem.  Akin to 'make install',
>>> this creates a new make target, dtbs_install.  The script that gets
>>> called defers to a vendor or distribution supplied installdtbs binary,
>>> if found in the system.  Otherwise, the default action is to install a
>>> given dtb into
>> This only appears to create ${compat}.dtb, and not ${dtb} too. 
> See my comment, above.
>> So, it doesn't seem to address part of the cover letter, "In addition,
>> some vendors have done a diligent job naming their devicetree source
>> files appropriately and we don't want to break their setups." Was that
>> deliberate? If so, I guess I need to send some patches to U-Boot.
> I assume you are still pulling from arch/arm/boot/dts/*.dtb, right?
> Those build products don't go away with this patch, so you should be
> fine.  Unless I'm mis-understanding your workflow...

Yes, but I thought the whole point of this was that everyone would/could
switch to running "make dtbs_install", then pulling out the files from
the install tree, instead of any use-case requiring obtaining files
directly from the source/build tree?

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