Re: [PATCH 08/10] iommu/omap: Use bus_set_iommu instead of register_iommu

[KyongHo Cho]

On Tue, Sep 27, 2011 at 8:10 PM, Ohad Ben-Cohen <ohad@xxxxxxxxxx> wrote:
> On Tue, Sep 27, 2011 at 2:00 PM, Roedel, Joerg <Joerg.Roedel@xxxxxxx> wrote:
>> The question is, of course, if the IOMMU on the platform device can
>> identify single devices on the bus that originates from it?
>
> We can probably query the ancestors of those devices until we find one
> with IOMMU properties.

We make a relationship between a platform device and
its dedicated IOMMU (Exynos System MMU) while machine initialization.
The information about the relationship is stored in the platdata of
IOMMU device descriptor
and it is also a platform device.

Exynos platform is in similar situation with OMAP's,
whereas implementation is different.
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