[PATCH 00/23] RFC: exynos multiplatform support

On Tuesday 05 of March 2013 21:54:22 Arnd Bergmann wrote:

On Tuesday 05 March 2013, Arnd Bergmann wrote:

quoted

The s3c64xx_dma code is also interesting because
it has both an implementation of the s3c_dma interface in
arch/arm/mach-s3c64xx/dma.c and one using the generic interface in
drivers/dma/amba-pl08x.c.

This actually brings me to an interesting idea: the s3c64xx SPI driver
is used with the regular dmaengine API and pl330 on S5P and Exynos,
but with the s3c-dma interface and pl080 on S3C64xx.

If we just convert S3C64xx to use the pl080 dmaengine driver
instead, we can apply my SPI patch without breaking anything.

AFAIR, the PL080 in S3C64xx is a slightly customized variant and requires 
some modifications to the driver. However I'm saying this only based on 
what I remember from the past, as I haven't checked current version of the 
driver yet, so it's possible that it has been modified already.

I believe I will eventually have to take a look at it anyway, as it's a 
necessary step towards S3C64xx DT support.

Best regards,
Tomasz

We still need a solution for the ASoC drivers, but they are
not as essential. We could probably move the wrapper files
from plat-samsung/*dma*.c to sounds/soc/samsung when that becomes
the only remaining user.

There is also drivers/mmc/host/s3cmci.c, which uses the s3c-dma
interface, but it is only used on s3c24xx, not s3c64xx or later.

	Arnd
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