[alsa-devel] [PATCH] asoc/multi-component: fsl: add support for variable SSI FIFO depth

Grant Likely grant.likely at secretlab.ca
Thu Aug 5 21:43:46 CEST 2010

On Thu, Aug 5, 2010 at 12:18 PM, Mark Brown
<broonie at opensource.wolfsonmicro.com> wrote:
> It also seems like busy work for users to have to add things like this
> to their device trees.  I think what I'd expect to see in a strongly
> device tree model is something like the tree for a board saying it's
> using a given SoC and then a standard device tree for the SoC which is
> shared between all the different users of that SoC getting merged in
> early in boot (probably from the kernel).  That way if we gain support
> for a new feature on the SoC or discover something that needs to be
> flagged up for workaround then every board using the SoC will pick it
> up.  This seems particularly useful for things like crypto engines that
> are physically internal to the SoC and so don't normally require
> per-board hookup.  In ASoC terms you do need board specific hookup so
> that's a bit less of an issue but it looses us some of the benefit of
> having standard chip drivers by pushing some of the chip generic
> knowledge into a per-machine location.

The lack of shared soc data in device trees is indeed a problem that
has been on my radar for a while now.  Fortunately I do have a
solution[1] which is partially implemented plus a contractual
obligation to deliver it to a client in the near future.  I fully
expect this will become a non-issue between now and about mid


[1] http://www.mail-archive.com/devicetree-discuss@lists.ozlabs.org/msg00680.html

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