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Tue, 5 May 2026 03:59:37 -0700 From: Akhil R To: Laxman Dewangan , Dmitry Osipenko , Andi Shyti , Thierry Reding , Jonathan Hunter , "Kartik Rajput" , Wolfram Sang , , , CC: , Akhil R Subject: [PATCH 0/4] i2c: tegra: Improve DMA mapping, latency, and power management Date: Tue, 5 May 2026 16:29:24 +0530 Message-ID: <20260505105928.38457-1-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-i2c@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: BL02EPF00021F6F:EE_|DM6PR12MB4250:EE_ X-MS-Office365-Filtering-Correlation-Id: 978381c7-ea1c-41b3-14ad-08deaa956f93 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700016|376014|1800799024|18002099003|921020|56012099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: S/cHRqpZAS3j2x8YHAsDveelaUsDpVF40JME2fWn6Lyo3nIusLGgVF0noTZX7vgIDX3LNSsX8S0zUgMf3KiejmWY5CmA/hDf2VOLw3/kOgWysN8HvJjEmvUxUiBNZEwr7CIgVC8DSykC151m7Kl5wqKw1YKmpbPCrDCmiMKNpPgq1RLxxAKgX477sQVwz8y9dOB5OpRCJv81eyxq+mVI7ApGj5Hov40w5WLMQCVq4gxWhlzwcH197o7AuMOXVIuopYUxesmOtUXiTEUfylwbZnp++3MaikTnuprk4jt/KhogoQDyqwZ7gUl9rkuYlwkZOuhewpMt+IQ7luG5cd1ZgghYUDYp4PGNUVar3b2qumbqf5Ubexq8A4JeA4LrNMB85T669P+3LLtEhVQc07JUXaZKX7TN0H9eVd8PUjjXaDbaMIzeFXDewmFghtCbG1jV X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 May 2026 10:59:53.0120 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 978381c7-ea1c-41b3-14ad-08deaa956f93 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF00021F6F.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4250 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. 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 | 86 +++++++++++++++++++++++----------- 1 file changed, 58 insertions(+), 28 deletions(-) -- 2.50.1