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Tue, 7 Oct 2025 06:57:40 -0700 From: Shubhi Garg To: Lee Jones , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , "Catalin Marinas" , Will Deacon , "Alexandre Belloni" , Jonathan Hunter CC: , , , , Shubhi Garg Subject: [PATCH v7 0/4] Add NVIDIA VRS RTC support Date: Tue, 7 Oct 2025 13:57:34 +0000 Message-ID: <20251007135738.487694-1-shgarg@nvidia.com> X-Mailer: git-send-email 2.43.0 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: SJ1PEPF0000231A:EE_|BY5PR12MB4036:EE_ X-MS-Office365-Filtering-Correlation-Id: a7b28b77-b031-4659-750b-08de05a981f6 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|1800799024|82310400026|376014|7416014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?mFvOfdS9HMQ9NlLGJOi35HT0ymdDFRPJvh1PiLqdY1vC15qOkxGh7R+EaUr4?= =?us-ascii?Q?Tw5giAK4OE5NsyuQKjEzLjIxN1+wM8qOhIRgZommSqAgUd5jx0leZD+DgrCh?= =?us-ascii?Q?zkaU+XfL68cORi8VlIqhJ2wTU6DWs/EkM4owTrCPDlE4SNhc7SKBSlMFaU0U?= =?us-ascii?Q?Tv3rX91LZjAGiOsqKPmQU7oUXJDI9o/l6bwb4xQbImu28diJhOCNweERQG8U?= =?us-ascii?Q?fxJLAvtg0zVL1y0KorURHfMuTgcp3a2Ow43hz/ZSf+Hsr7MciKMbwdn1eKsO?= =?us-ascii?Q?rt3KSiTzTnzy+H5zgD4E5za1myFiYnpPHMH8pXOn3+fsEB029Ya1Yq4RHr9B?= =?us-ascii?Q?7CvPm21cf+pNGbXdjhsaeSSormWSmXMoGNY0irTOu82qitPJbf6Fp36yMFW7?= =?us-ascii?Q?gA5huwz8yw8nE3WN8cDzDhBji/B+K7RqHr5SwIZMfwqO12gLCJQDnDSObxCD?= =?us-ascii?Q?2CVRgC6UVc7eYbq0+Iljko0Cde9TVbdZVKh+OGfXG5oZjTYd1PuUzd0P+qwf?= =?us-ascii?Q?LRSm9BJQzl10sMhERAbMue0QzXru/RyC3DdQYBzeK21yBhbQ+yxSVdbs8ijQ?= =?us-ascii?Q?O3QIs7fDQeyMCHjn+GXNoMnWqK5387Zk+B0RWCuhaqgEd0RCUmYqH95NfCoB?= =?us-ascii?Q?9SalU2RI4g1xyBBk6yEiLGOY7GH3SCKCHW5k/AhabPbZG6NBvRhNCqD2tOT5?= =?us-ascii?Q?xa3YmrfvCHqdkj3lDQqHuN/FJWTgRIwTv21HN15d/y65caLL92nRAIsZaIdY?= =?us-ascii?Q?jZw4Z3waL1yRvdE3giGhOfyAaJ1or4sfhnvcvPgTh66URMZ1bb/kXbjlv8CW?= =?us-ascii?Q?To4yLji2sTldStqCAG3d1yOzolL18seRCm4g7sTZF6Zw7FUbqbWYBU+rbp4r?= =?us-ascii?Q?hC2vtuVB4QU+GthlJSbbcT+JwpyaXgLhR1Gq1tS172/ZuIxah+1qSMhWnCnQ?= =?us-ascii?Q?7tw2OwkBm0utGTIAif17WgqmWdePQxOJiqp2/EHojnnSD1JCQB0X0rNeVjFV?= =?us-ascii?Q?r+bRvFG2nrPGGolEnPoHaWlkkBPZLJMmb2IEpKX1rITc+76aC42w64oEzKCh?= =?us-ascii?Q?PCOqGiWTUhp/Qh/eum1pFlRdq/opu7mjha+PgHxjlbos6mjzaHU+4qLVSaZA?= =?us-ascii?Q?0Rr2aUVYX7a5CAcO0ycUW2at30M1l3qcP8lScuZaJaVjq1rfdgD3Ap6E1ckA?= =?us-ascii?Q?1Pb3sA8Aa97JCdwq7t+NPYDtZHMu0uq5UU/3m9PN0kv7UmNXdQeAhe1bwOEt?= =?us-ascii?Q?8P6G0RqLk8D5b1iGPaZ7tarsRSBWzyaJnGEVQvazwABB9tzvSU+T8zOYWIia?= =?us-ascii?Q?yt3ZRWOQVyPEm8nNjian4OGO7HBS1Ex1d088rRdrSsGBLsvYSzfgePbZpTrr?= =?us-ascii?Q?LsGSxGBHUQfaFzIs8l3bcgwjNJAcyKL75LwMDQJ+4K1yVo7JOD6yPsYyOTcD?= =?us-ascii?Q?9MBdNNhtXuj8AzDM8kaoKOeGtT8yQ/O2j9WOVcHXrCRALlYNzMPec0Jjh2Zc?= =?us-ascii?Q?HAKusw+VAI4d5DfES+CSXcA21S+rhCnRXXcP8lYYUUC8T17B+NxZjHrf0+BG?= =?us-ascii?Q?35kaKQKWyj9aNDeW12g=3D?= X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230040)(36860700013)(1800799024)(82310400026)(376014)(7416014);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Oct 2025 13:57:52.0935 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a7b28b77-b031-4659-750b-08de05a981f6 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF0000231A.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB4036 This patch series adds support for NVIDIA's Voltage Regulator Specification (VRS) RTC device. It provides following features: - read/set system time - 32kHz clock support with backup battery input to retain system time across boot - alarm functionality to wake system from suspend and shutdown state The series includes: - Device tree bindings for the VRS RTC - VRS device tree nodes for NVIDIA platforms - VRS RTC device driver - Configuration updates to enable the driver Changes in v7: - rtc driver fixes to remove mutex lock - moved rtc register definitions in driver - dt binding file name fix to keep same as compatible Changes in v6: - compatible name fixes to "nvidia,vrs-10" - changed dtb node name to pmic@3c Changes in v5: - moved device tree bindings from mfd to rtc - changed dtb node name to rtc@3c - removed VRS MFD driver - moved VRS common functions to RTC driver - removed unused register definitions from header - changed driver compatible to "nvidia,vrs10-rtc" Changes in v4: - fixed device tree node name to "pmic@3c" in dtb aliases Changes in v3: - fixed device tree node name to generic "pmic@3c" - fixed indentation in dt-bindings - added rate limiting to interrupt clearing debug logs - removed unnecessary braces in if blocks - changed dependency from I2C=y to I2C in mfd Kconfig - fixed return value in RTC driver function calls - fixed sizeof(*variable) inside rtc driver devm_kzalloc - switch to devm_device_init_wakeup() for automatic cleanup Changes in v2: - fixed, copyrights, definitions and dtb node in dt-bindings - removed unnecessary logs from MFD and RTC driver - fixed RTC allocation and registration APIs - removed unnecessary functions in RTC driver - used rtc_lock/unlock in RTC irq handler - added alias to assign VRS RTC as RTC0 - added driver entry in MAINTAINERS - few other miinor changes done in drivers Shubhi Garg (4): dt-bindings: rtc: Document NVIDIA VRS RTC arm64: tegra: Add device-tree node for NVVRS RTC rtc: nvvrs: add NVIDIA VRS RTC device driver arm64: defconfig: enable NVIDIA VRS PSEQ RTC .../bindings/rtc/nvidia,vrs-10.yaml | 59 ++ MAINTAINERS | 8 + .../arm64/boot/dts/nvidia/tegra234-p3701.dtsi | 11 + .../arm64/boot/dts/nvidia/tegra234-p3767.dtsi | 15 + arch/arm64/configs/defconfig | 1 + drivers/rtc/Kconfig | 9 + drivers/rtc/Makefile | 1 + drivers/rtc/rtc-nvidia-vrs10.c | 542 ++++++++++++++++++ 8 files changed, 646 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/nvidia,vrs-10.yaml create mode 100644 drivers/rtc/rtc-nvidia-vrs10.c -- 2.43.0