Re: [PATCH 3/3] dmaengine: sun6i: Add support for Allwinner A64

[Maxime Ripard]

Hi,

On Mon, Sep 04, 2017 at 09:14:52AM +0100, André Przywara wrote:
> > And obviously, while maintaining the stability of the binding of those
> > hundreds properties.
> > 
> > Or, you can base all this on the compatible, and be done with it once
> > and for all.
> 
> What I am after is to cover SoCs which *don't* have differences in their
> register layout, for instance A83T, H3, A64, R40.
> In an ideal world we could have reused the H3 compatible string,
> adjusting the number of channels for each SoC in the DT.
> 
> So I see that having a generic compatible name will not fly, as we now
> have differences which should not be modelled by DT properties.
> But I still think we should try to cover those non-register differences
> (number of channels) with a DT property, to allow reusing the existing
> driver code whenever possible. As is stands with this series, the R40
> support should just be a matter of:
> 	compatible = "allwinner,sun8i-r40-dma",
> 		     "allwinner,sun50i-a64-dma";

I just suggested the exact same thing, and then saw your mail, so I
guess we have an agreement :)

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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