[PATCH v8 06/12] ARM: dts: Add description of System MMU of Exynos SoCs

Will Deacon
2013-08-08T21:43:43Z

On Thu, Aug 08, 2013 at 10:38:10PM +0100, Tomasz Figa wrote:
> On Thursday 08 of August 2013 08:09:49 Rob Herring wrote:
> > On Thu, Aug 1, 2013 at 8:05 AM, Cho KyongHo <pullip.cho@samsung.com>
> wrote:
> > > Should this align with ARM System MMU bindings?
> > > System MMU in Exynos SoC is different from ARM System MMU.
> > > It does not follows the specifications of ARM System MMU.
> >
> > I'm not saying the h/w is the same or even the same spec, but how you
> > describe a master to iommu connection needs to be done in the same
> > way. This should be done in the same way for ALL iommu's. And if what
> > is defined does not work for you, then we need to understand that and
> > fix the binding now.
>
> +1
>
> All IOMMUs should use a generic IOMMU Device Tree bindings (and in
> general, the same should be true for all Device Tree bindings).
>
> This means that if we already have some bindings for IOMMU, then they
> should be reused if possible or extended if there is anything missing.
>
> Of course there might be things that such generic bindings can't specify.
> In this case device-specific properties can be introduced, but this is
> last resort.

I'm also happy to discuss and/or review bindings in light of what we did for
the ARM SMMU.

Will