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[109.252.91.252]) by smtp.googlemail.com with ESMTPSA id z2sm1630625lfc.209.2020.10.03.07.05.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 03 Oct 2020 07:05:53 -0700 (PDT) Subject: Re: [PATCH v5 2/3] iommu/tegra-smmu: Rework tegra_smmu_probe_device() To: Nicolin Chen , thierry.reding@gmail.com, joro@8bytes.org Cc: vdumpa@nvidia.com, jonathanh@nvidia.com, linux-tegra@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org References: <20201003065947.18671-1-nicoleotsuka@gmail.com> <20201003065947.18671-3-nicoleotsuka@gmail.com> From: Dmitry Osipenko Message-ID: <97d69b0b-db32-08ff-0691-73cfa571f974@gmail.com> Date: Sat, 3 Oct 2020 17:05:52 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20201003065947.18671-3-nicoleotsuka@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 03.10.2020 09:59, Nicolin Chen пишет: > ubuntu@jetson:~$ 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.