Documentation/devicetree/bindings/rtc/atmel,at91sam9260-rtt.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries
%YAML 1.2
---
$id: http://devicetree.org/schemas/rtc/atmel,at91sam9260-rtt.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Atmel AT91 RTT Device Tree Bindings

allOf:
  - $ref: "rtc.yaml#"

maintainers:
  - Alexandre Belloni <alexandre.belloni@bootlin.com>

properties:
  compatible:
    oneOf:
      - items:
          - const: atmel,at91sam9260-rtt
      - items:
          - const: microchip,sam9x60-rtt
          - const: atmel,at91sam9260-rtt
      - items:
          - const: microchip,sama7g5-rtt
          - const: microchip,sam9x60-rtt
          - const: atmel,at91sam9260-rtt

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    maxItems: 1

  atmel,rtt-rtc-time-reg:
    $ref: /schemas/types.yaml#/definitions/phandle-array
    items:
      - items:
          - description: Phandle to the GPBR node.
          - description: Offset within the GPBR block.
    description:
      Should encode the GPBR register used to store the time base when the
      RTT is used as an RTC. The first cell should point to the GPBR node
      and the second one encodes the offset within the GPBR block (or in
      other words, the GPBR register used to store the time base).

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - atmel,rtt-rtc-time-reg

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/irq.h>

    rtc@fffffd20 {
        compatible = "atmel,at91sam9260-rtt";
        reg = <0xfffffd20 0x10>;
        interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
        clocks = <&clk32k>;
        atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
    };