Re: [PATCH v2 1/3] ALSA SoC: Add OpenFirmware helper for matching bus and codec drivers

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Mark Brown wrote:

>> The PowerPC side isn't without fault too. PowerPC still doesn't have a
>> good way to load the fabric/machine driver.
> 
> I'm finding it difficult to square these two statements - from an ASoC
> point of view the main thing this patch is doing is adding a machine
> driver and that's not something that's going to go away.  

Jon's concern is that there is no straightforward way to build a kernel with
multiple fabric drivers and have the right one chosen via the device tree.  This
is just a limitation of the device tree model, and no one has come up with a
good solution yet.

The problem still exists in ASoC V2.  However, it's not anything that ASoC
itself needs to be concerned with.  It's purely a PowerPC problem.

>> Which are we going to call it, fabric or machine? I had been working
>> on the Apple code in sound/aoa. It is called fabric in that code. The
>> equivalent driver is called machine in ASoC v1.
> 
> ASoC has always called it a machine driver.

Wait, I thought it's supposed to be called a fabric driver now?  On PowerPC, it
should be called a fabric driver because we already have machine drivers.

-- 
Timur Tabi
Linux kernel developer at Freescale
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