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Wed, 11 Jun 2025 00:34:58 -0700 From: Shubhi Garg To: Lee Jones , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , "Catalin Marinas" , Will Deacon , "Alexandre Belloni" , <--to=jonathanh@nvidia.com> CC: , , , , Shubhi Garg Subject: [PATCH v3 1/6] dt-bindings: mfd: add NVIDIA VRS PSEQ Date: Wed, 11 Jun 2025 07:34:49 +0000 Message-ID: <20250611073454.978859-2-shgarg@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250611073454.978859-1-shgarg@nvidia.com> References: <20250611073454.978859-1-shgarg@nvidia.com> Precedence: bulk X-Mailing-List: linux-rtc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB72:EE_|IA0PR12MB7700:EE_ X-MS-Office365-Filtering-Correlation-Id: e37c9952-9540-473c-bd9a-08dda8ba8082 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|7416014|36860700013|376014|13003099007; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Jun 2025 07:35:12.7885 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e37c9952-9540-473c-bd9a-08dda8ba8082 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: BL6PEPF0001AB72.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB7700 Add support for NVIDIA VRS (Voltage Regulator Specification) power sequencer device. NVIDIA VRS PSEQ provides 32kHz RTC support with backup battery for system timing. It controls ON/OFF and suspend/resume power sequencing of system power rails on below NVIDIA platforms: - NVIDIA Jetson AGX Orin Developer Kit - NVIDIA IGX Orin Development Kit - NVIDIA Jetson Orin NX Developer Kit - NVIDIA Jetson Orin Nano Developer Kit Signed-off-by: Shubhi Garg --- v3: - fixed device tree node name to generic "pmic@3c" - fixed indentation v2: - fixed copyrights - updated description with RTC information - added status node in dtb node example .../bindings/mfd/nvidia,vrs-pseq.yaml | 60 +++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/nvidia,vrs-pseq.yaml diff --git a/Documentation/devicetree/bindings/mfd/nvidia,vrs-pseq.yaml b/Documentation/devicetree/bindings/mfd/nvidia,vrs-pseq.yaml new file mode 100644 index 000000000000..65bf77f70c44 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/nvidia,vrs-pseq.yaml @@ -0,0 +1,60 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/nvidia,vrs-pseq.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NVIDIA Voltage Regulator Specification Power Sequencer + +maintainers: + - Shubhi Garg + +description: + NVIDIA Voltage Regulator Specification Power Sequencer device controls + ON/OFF and suspend/resume power sequencing of system power rails for NVIDIA + SoCs. It provides 32kHz RTC clock support with backup battery for system + timing. The device also acts as an interrupt controller for managing + interrupts from the VRS power sequencer. + +properties: + compatible: + const: nvidia,vrs-pseq + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + interrupt-controller: true + + '#interrupt-cells': + const: 2 + description: + The first cell is the IRQ number, the second cell is the trigger type. + +required: + - compatible + - reg + - interrupts + - interrupt-controller + - '#interrupt-cells' + +additionalProperties: false + +examples: + - | + #include + i2c { + #address-cells = <1>; + #size-cells = <0>; + + pmic@3c { + compatible = "nvidia,vrs-pseq"; + reg = <0x3c>; + interrupt-parent = <&pmc>; + interrupts = <24 IRQ_TYPE_LEVEL_LOW>; + interrupt-controller; + #interrupt-cells = <2>; + }; + }; -- 2.43.0