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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Jul 2025 13:04:06.4278 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3c18718d-eec0-4eba-063e-08ddc9e967fd 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: SN1PEPF00036F3D.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH1PPF989868826 Add device tree bindings for NVIDIA VRS (Voltage Regulator Specification) RTC device. NVIDIA VRS RTC provides functionality to get/set system time, retain system time across boot, wake system from suspend and shutdown state. Supported 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 --- v5: - moved device tree bindings from mfd to rtc - changed dtb node name to rtc@3c - changed compatible string to "nvidia,vrs10-rtc" v4: - no changes 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/rtc/nvidia,vrs10-rtc.yaml | 57 +++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/nvidia,vrs10-rtc.yaml diff --git a/Documentation/devicetree/bindings/rtc/nvidia,vrs10-rtc.yaml b/Documentation/devicetree/bindings/rtc/nvidia,vrs10-rtc.yaml new file mode 100644 index 000000000000..b7eea5f03e5a --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/nvidia,vrs10-rtc.yaml @@ -0,0 +1,57 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/rtc/nvidia,vrs10-rtc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NVIDIA Voltage Regulator Specification Real Time Clock + +maintainers: + - Shubhi Garg + +description: + NVIDIA VRS (Voltage Regulator Specification) RTC provides 32kHz RTC clock + support with backup battery for system timing. It provides alarm functionality + to wake system from suspend and shutdown state. The device also acts as an + interrupt controller for managing interrupts from the VRS. + +properties: + compatible: + const: nvidia,vrs10-rtc + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + interrupt-controller: true + + '#interrupt-cells': + const: 2 + +required: + - compatible + - reg + - interrupts + - interrupt-controller + - '#interrupt-cells' + +additionalProperties: false + +examples: + - | + #include + i2c { + #address-cells = <1>; + #size-cells = <0>; + + rtc@3c { + compatible = "nvidia,vrs10-rtc"; + reg = <0x3c>; + interrupt-parent = <&pmc>; + interrupts = <24 IRQ_TYPE_LEVEL_LOW>; + interrupt-controller; + #interrupt-cells = <2>; + }; + }; -- 2.43.0