On Fri, May 30, 2014 at 07:44:06PM +0300, Hiroshi Doyu wrote:
>
> Stephen Warren <swarren@xxxxxxxxxxxxx> writes:
>
> > On 05/30/2014 05:20 AM, Hiroshi Doyu wrote:
> >> Add sdhci iommus bindings.
> >
> > This isn't adding bindings, it's adding DT properties. A binding is the
> > documentation of the schema, not the actual data in the DT.
> >
> >> diff --git a/arch/arm/boot/dts/tegra124.dtsi b/arch/arm/boot/dts/tegra124.dtsi
> >> index 5b339ca8a1ab..011831ffd390 100644
> >> --- a/arch/arm/boot/dts/tegra124.dtsi
> >> +++ b/arch/arm/boot/dts/tegra124.dtsi
> >> @@ -472,6 +472,7 @@
> >> resets = <&tegra_car 14>;
> >> reset-names = "sdhci";
> >> status = "disabled";
> >> + iommus=<&smmu TEGRA_SWGROUP_CELLS(SDMMC1A)>;
> >
> > Is the "iommus" property documented anywhere? I suspect not, since
> > there's an active ongoing discussion about how IOMMU bindings should be
> > structured. I suspect this series needs to wait until that discussion
> > completes, and the "iommus" property is documented somewhere.
>
> Yes, I'm catching up that thread now. That's why I drop document part.
>
> If Thierry's patch(v2 or v3) is accpeted, this patch won't need any
> further doc since it will use the IOMMU standard bindings("iommus = ").
The binding for the Tegra SMMU would still need to document what the
specifier means. Also I think we should change the current meaning of a
two-cell bitmask to the more explicit one cell per SWGROUP binding, that
is something like this:
iommus = <&smmu TEGRA_SWGROUP_SDMMC1A>;
Thierry
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