Re: [PATCH v3 6/6] iommu: mtk_iommu: Lookup phandle to retrieve syscon to pericfg

[AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>]

Il 13/06/22 07:32, Yong Wu ha scritto:
> On Thu, 2022-06-09 at 12:08 +0200, AngeloGioacchino Del Regno wrote:
>> On some SoCs (of which only MT8195 is supported at the time of
>> writing),
>> the "R" and "W" (I/O) enable bits for the IOMMUs are in the
>> pericfg_ao
>> register space and not in the IOMMU space: as it happened already
>> with
>> infracfg, it is expected that this list will grow.
> 
> Currently I don't see the list will grow. As commented before, In the
> lastest SoC, The IOMMU enable bits for IOMMU will be in ATF, rather
> than in this pericfg register region. In this case, Is this patch
> unnecessary? or we could add this patch when there are 2 SoCs use this
> setting at least?  what's your opinion?
> 

Perhaps I've misunderstood... besides, can you please check if there's any
other SoC (not just chromebooks, also smartphone SoCs) that need this logic?

Thanks,
Angelo


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