dt-bindings: rtc: Convert and update jz4740-rtc doc to YAML

JZ4740 and similar SoCs real-time clock driver

Required properties:

- compatible: One of:

  - "ingenic,jz4740-rtc" - for use with the JZ4740 SoC

  - "ingenic,jz4780-rtc" - for use with the JZ4780 SoC

- reg: Address range of rtc register set

- interrupts: IRQ number for the alarm interrupt

- clocks: phandle to the "rtc" clock

- clock-names: must be "rtc"

Optional properties:

- system-power-controller: To use this component as the

  system power controller

- reset-pin-assert-time-ms: Reset pin low-level assertion

  time after wakeup (default 60ms; range 0-125ms if RTC clock

  at 32 kHz)

- min-wakeup-pin-assert-time-ms: Minimum wakeup pin assertion

  time (default 100ms; range 0-2s if RTC clock at 32 kHz)

Example:

rtc@10003000 {

	compatible = "ingenic,jz4740-rtc";

	reg = <0x10003000 0x40>;

	interrupt-parent = <&intc>;

	interrupts = <32>;

	clocks = <&rtc_clock>;

	clock-names = "rtc";

	system-power-controller;

	reset-pin-assert-time-ms = <60>;

	min-wakeup-pin-assert-time-ms = <100>;

};

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/rtc/ingenic,rtc.yaml#

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

title: Ingenic SoCs Real-Time Clock DT bindings

maintainers:

  - Paul Cercueil <paul@crapouillou.net>

allOf:

  - $ref: rtc.yaml#

properties:

  compatible:

    oneOf:

      - enum:

        - ingenic,jz4740-rtc

        - ingenic,jz4760-rtc

      - items:

        - const: ingenic,jz4725b-rtc

        - const: ingenic,jz4740-rtc

      - items:

        - enum:

          - ingenic,jz4770-rtc

          - ingenic,jz4780-rtc

        - const: ingenic,jz4760-rtc

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  clocks:

    maxItems: 1

  clock-names:

    const: rtc

  system-power-controller:

    description: |

      Indicates that the RTC is responsible for powering OFF

      the system.

    type: boolean

  ingenic,reset-pin-assert-time-ms:

    minimum: 0

    maximum: 125

    default: 60

    description: |

      Reset pin low-level assertion time after wakeup

      (assuming RTC clock at 32 kHz)

  ingenic,min-wakeup-pin-assert-time-ms:

    minimum: 0

    maximum: 2000

    default: 100

    description: |

      Minimum wakeup pin assertion time

      (assuming RTC clock at 32 kHz)

required:

  - compatible

  - reg

  - interrupts

  - clocks

  - clock-names

examples:

  - |

    #include <dt-bindings/clock/jz4740-cgu.h>

    rtc_dev: rtc@10003000 {

      compatible = "ingenic,jz4740-rtc";

      reg = <0x10003000 0x40>;

      interrupt-parent = <&intc>;

      interrupts = <15>;

      clocks = <&cgu JZ4740_CLK_RTC>;

      clock-names = "rtc";

    };