Added base device tree source for audiomini

[fe-wickham]

Additionally added Makefile for easily building it and Jenkinsfiles so that Jenkins automatically builds the dtb files on update

[tvannoy]

Where did this dts come from? I think it is better to use the dts that is in the kernel source tree, as that is guaranteed to be based upon the base device tree created by Intel; doing so also guarantees that we get any bug fixes that Intel makes. Plus, there is already a framework for creating dtbs.

On the other hand, keeping our dts sources out-of-tree does perhaps make updating kernel versions easier.

[fe-wickham]

Where did this dts come from?

Passthrough project here

I think it is better to use the dts that is in the kernel source tree, as that is guaranteed to be based upon the base device tree created by Intel; doing so also guarantees that we get any bug fixes that Intel makes. Plus, there is already a framework for creating dtbs.

I mostly agree. Thats part of why this is just a draft PR, because if I get around to updating this to use the dts from the kernel source this isn't needed but I'd rather have this than nothing.

On the other hand, keeping our dts sources out-of-tree does perhaps make updating kernel versions easier.

Does this really impact the kernel versions much? We may need to make sure we move any custom dts changes to the new branch I suppose but otherwise it shouldn't have much of an impact.

[tvannoy]

Yeah, it's best to at least have something.

Does this really impact the kernel versions much? We may need to make sure we move any custom dts changes to the new branch I suppose but otherwise it shouldn't have much of an impact.

Not really. There's not really any dependencies between the dts and the kernel version (unless of course a breaking change in the device tree subsystem was introduced, but that's unlikely). The small benefit is that updating to a new branch is easier if we don't have any commits that aren't upstream. But the benefit is quite small, as cherry-picking our handful of commits is not very difficult, and we can always just copy/paste files and lose our small commit history.