scottwood at freescale.com
Thu Apr 23 07:38:02 EST 2009
Kumar Gala wrote:
> I disagree. If you update your kernel you should update your device
> tree (thus we have .dts in the kernel tree and not somewhere else).
No. The device tree is a means to pass information from the firmware to
the kernel. It is part of the firmware. That the repository of trees
is in the Linux kernel for any boards which are not including the tree
inside a bootwrapper is a historical accident.
Updating the dtb with the kernel just shifts the risk of incompatibility
to interactions between the firmware and the dtb. The same backwards
compatibility considerations when making kernel changes that depend on
firmware changes should be made when making kernel changes that depend
on dts changes.
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