linux-kernel - Re: [PATCH v5 2/3] iommu/tegra-smmu: Rework tegra_smmu_probe

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Message-ID: <97d69b0b-db32-08ff-0691-73cfa571f974@gmail.com>
Date:   Sat, 3 Oct 2020 17:05:52 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Nicolin Chen <nicoleotsuka@...il.com>, thierry.reding@...il.com,
        joro@...tes.org
Cc:     vdumpa@...dia.com, jonathanh@...dia.com,
        linux-tegra@...r.kernel.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 2/3] iommu/tegra-smmu: Rework tegra_smmu_probe_device()

03.10.2020 09:59, Nicolin Chen пишет:
>     ubuntu@...son:~$ dmesg | grep iommu
>     iommu: Default domain type: Translated 
>     tegra-i2c 7000c400.i2c: Adding to iommu group 0
>     tegra-i2c 7000c500.i2c: Adding to iommu group 0
>     tegra-i2c 7000d000.i2c: Adding to iommu group 0
>     tegra-pcie 1003000.pcie: Adding to iommu group 1

Could you please explain how you got I2C into IOMMU?

Are you testing vanilla upstream kerne? Upstream DT doesn't assign AHB
group to I2C controllers, nor to APB DMA controller.