Re: [linux-sunxi] Re: [PATCH 1/5] ARM: sunxi: Add driver for SD/MMC hosts found on Allwinner sunxi SoCs

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Hi,

On 12/15/2013 10:19 PM, David Lanzendörfer wrote:
[...]
Do you have something like this in mind? ->
drivers/mmc/host/dw_mmc-exynos.c
No, as explained in my previous mail the idmac being shared seemed to be the
only 2 things the dw-mmc controller and the sunxi-mmc controller have in
common.
Ok.

Looking at dw_mmc-exynos.c it still pretty much is the classic dw-mmc
controller with some extra bits, where as the sunxi controller is
significantly different (which allows us to write a significant simpler
driver).
Do you have an outline for such a driver as you imagine it?
I'd be interested into some "experiments".
Maybe you have a repository where you could push a dedicated tree
for some colaboration on this?

I think that we're miss-communicating a bit here. What I'm trying to say
is that trying to extend the dw_mmc driver to support sunxi is a bad
idea because the sunxi hardware is quite different. And that the
sunxi hardware having autostop allows the existing sunxi-mci driver to
be much simpler then the dw-mmc driver.

IOW the much simpler driver already exists and it is the sunxi-mci
driver.

Regards,

Hans
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