linux-kernel - Re: AT32 ASoC Driver Patches on alsa-devel

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Message-ID: <20080605162206.0a34a54e@hskinnemo-gx745.norway.atmel.com>
Date:	Thu, 5 Jun 2008 16:22:06 +0200
From:	Haavard Skinnemoen <haavard.skinnemoen@...el.com>
To:	Geoffrey Wossum <geoffrey@...er.net>
Cc:	kernel@...32linux.org, linux-kernel@...r.kernel.org
Subject: Re: AT32 ASoC Driver Patches on alsa-devel

Geoffrey Wossum <geoffrey@...er.net> wrote:
> For anyone that's interested, there's patches to add ALSA System-on-Chip sound 
> platform drivers for the AVR32 being discussed on the alsa-devel mailing list 
> right now.

Hmm. For something that depends on a metric shitload of middle layers,
it is surprisingly large...

I have to admit I don't understand the current sound situation at all.
With this driver, we now have:
  * An OSS driver for the AP7000 Audio Bitstream DAC
  * A "regular" ALSA driver for the AC97C (not based on ASoC)
  * Two different "generic" AC97 layers: one in sound/pci/ac97 and one
    in sound/soc/ac97 (the AC97C driver uses the former)
  * An i2s driver for the AT73C213 chip using the SSC controller and SPI
  * Another SSC driver based on the ASoC layer
  * Some sort of "AT32 PCM" layer which apparently can only be used
    with the SSC controller
  * The above two being essentially identical to similar drivers for
    AT91

Can someone please help me out here? In particular, what is ASoC and
why should I want to use it?

Haavard
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