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I have a situation in which same device trees are used with different kernels. Can the device trees be build only once and used with all kernels?

The reason I ask this is because I found the device tree compiler having a separate repository that the kernel. Also the explanation from this answer doesn't relate device tree compilation directly to a kernel version.

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TheMeaningfulEngineer
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  • Vague. Device Tree could refer to Repository Source Code or The Structure Describing System Hardware. Here, the user meant Structure Describing System Hardware. – Tyler Maginnis Oct 03 '14 at 12:18
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    @TylerMaginnis Uh? No, “device tree” in a Linux kernel context is a structure describing hardware. A source code tree would not be called “device tree” but “kernel source code” or just possibly “driver (source) tree”. – Gilles 'SO- stop being evil' Oct 03 '14 at 23:22
  • The reference to compiler in this question mislead me to answer this in the context of kernel driver tree. I believe the answer here is that each Kernel you compile can only have one device tree. So you can build it twice (the device tree) in two different Kernels. – Tyler Maginnis Oct 03 '14 at 23:37
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    @TylerMaginnis I'm pretty sure the OP is asking whether or not a dtb compiled for, say, 3.14 could be used for a 3.16 kernel. And I'm 95% sure the answer is yes, but I'm not positive. – Tony Arkles Feb 20 '15 at 16:52

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After being in a situation where this could be tested I've witnessed that you can't use a device tree compiled for kernel 3.10 on kernel 3.14. and vice versa.

TheMeaningfulEngineer
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