Re: [PATCH V7 1/7] kbuild: centralize .dts->.dtb rule
From: Stephen Warren <hidden>
Date: 2012-11-28 18:33:46
On 11/27/2012 04:29 PM, Stephen Warren wrote:
All architectures that use cmd_dtc do so in almost the same way. Create a central build rule to avoid duplication. The one difference is that most current uses of dtc build $(obj)/%.dtb from $(src)/dts/%.dts rather than building the .dtb in the same directory as the .dts file. This difference will be eliminated arch-by-arch in future patches. MIPS is the exception here; it already uses the exact same rule as the new common rule, so the duplicate is removed in this patch to avoid any conflict. arch/mips changes courtesy of Ralf Baechle. Update Documentation/kbuild to remove the explicit call to cmd_dtc from the example, now that the rule exists in a centralized location.
Ben, Paul, Following this patch (http://lkml.org/lkml/2012/11/27/555), I posted a series of patches to convert almost all architectures to using the centralized rule. The one architecture I didn't convert was PowerPC. I didn't convert it because arch/powerpc/boot/Makefile contains a large number of rules (to generate *Image.% where % is a board name) that depend on %.dtb, which is expected to be in arch/powerpc/boot rather than arch/powerpc/boot/dts. Now, I guess it's possible to convert them all to expect the .dtb files to be in dts/ and also have arch/powerpc/boot/Makefile call make in boot/dts/ to make each required .dtb file. However, the patch would be a bit larger than all the other architecture patches. Do you want me to do that conversion, or would you rather I leave PowerPC alone? Thanks for any feedback.