Commit 4c03653f authored by Shubhi Garg's avatar Shubhi Garg Committed by Alexandre Belloni
Browse files

dt-bindings: rtc: Document NVIDIA VRS RTC 



Add device tree bindings for NVIDIA VRS (Voltage Regulator Specification)
RTC device. NVIDIA VRS is a Power Management IC (PMIC) that implements a
power sequencing solution with I2C interface. The device includes RTC
which 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: default avatarShubhi Garg <shgarg@nvidia.com>
Reviewed-by: default avatarRob Herring (Arm) <robh@kernel.org>
Reviewed-by: default avatarJon Hunter <jonathanh@nvidia.com>
Tested-by: default avatarJon Hunter <jonathanh@nvidia.com>
Link: https://patch.msgid.link/20251007135738.487694-2-shgarg@nvidia.com


Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent 7adca706

Documentation/devicetree/bindings/rtc/nvidia,vrs-10.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/rtc/nvidia,vrs-10.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: NVIDIA Voltage Regulator Specification Real Time Clock



maintainers:

  - Shubhi Garg <shgarg@nvidia.com>



description:

  NVIDIA VRS-10 (Voltage Regulator Specification) is a Power Management IC

  (PMIC) that implements a power sequencing solution with I2C interface.

  The device includes a real-time clock (RTC) with 32kHz clock output and

  backup battery support, alarm functionality for system wake-up from

  suspend and shutdown states, OTP memory for power sequencing configuration,

  and an interrupt controller for managing VRS events.



properties:

  compatible:

    const: nvidia,vrs-10



  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 <dt-bindings/interrupt-controller/irq.h>

    i2c {

        #address-cells = <1>;

        #size-cells = <0>;



        pmic@3c {

            compatible = "nvidia,vrs-10";

            reg = <0x3c>;

            interrupt-parent = <&pmc>;

            interrupts = <24 IRQ_TYPE_LEVEL_LOW>;

            interrupt-controller;

            #interrupt-cells = <2>;

        };

    };