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Mon, 18 May 2026 04:40:18 -0700 From: Akhil R To: Laxman Dewangan , Dmitry Osipenko , Andi Shyti , Thierry Reding , Jonathan Hunter , "Kartik Rajput" , Wolfram Sang , , , CC: Akhil R Subject: [PATCH v2 0/4] i2c: tegra: Improve DMA mapping, latency, and power management Date: Mon, 18 May 2026 17:10:09 +0530 Message-ID: <20260518114013.62065-1-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-tegra@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF000023D9:EE_|SJ2PR12MB9139:EE_ X-MS-Office365-Filtering-Correlation-Id: eb536bd4-f64c-4412-505e-08deb4d24929 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|376014|1800799024|36860700016|11063799003|18002099003|56012099003|3023799003|921020; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: WVvFd3DiyafFl9cidUO4G/SwkZevP+Dinr9oXKcjk0HnnE5hNwbjpklhtOsxrpFvwRo6+hDEhP+7XiOS7KBe0ofqRS/ZfNa63as8pzFwOcc5K7JHFD8aPRKyT01Ae8DJEHsJJaX8mtCNdswpGYc/cfcaF3oTqPWQej04YO53Qtke15PdwwCq7usU8tJCkmifDTEpDG0nULey704pwS5UmvC4UMNz7CReSMfqlmYV5EEIeA1DRwvo4D6ZrDr5QhAdt3k1FM0e+0/J207Sgl/AAVC7ARwZ6+zQvN8JrpwI3Dm4vRRplIoibFTEUYBP5z4vto89LxNBenfr+H1iJEJnzGvhDWaX3ziT/lL+g1Tchs4JRKupD6xLgW2w4LeOO6MunBD27pGWRE2W8+qI5B3o/9xDpWGA/hVxnrHwdSOiP2kWjVfPCY6Y4o3/FVG0C39y X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 May 2026 11:40:39.6594 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: eb536bd4-f64c-4412-505e-08deb4d24929 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF000023D9.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB9139 This series addresses several aspects of the Tegra I2C driver: - DMA mapping: Use the proper DMA device for buffer allocation to ensure correct DMA address translation. - Transfer latency: Disable fair arbitration on non-MCTP buses to reduce transfer latency. - Timing parameters: Update I2C timing values for Tegra410. - Power management: Keep the controller available during noirq suspend/resume phases for system dependencies. v1->v2: * Add description for is_mctp in the struct Akhil R (4): i2c: tegra: use dmaengine_get_dma_device() for DMA buffer allocation i2c: tegra: Disable fair arbitration for non-MCTP buses i2c: tegra: Update Tegra410 I2C timing parameters i2c: tegra: Fix NOIRQ suspend/resume drivers/i2c/busses/i2c-tegra.c | 87 +++++++++++++++++++++++----------- 1 file changed, 59 insertions(+), 28 deletions(-) -- 2.50.1