dt-bindings: rtc: isl1208: Convert to json-schema

Intersil ISL1209/19 I2C RTC/Alarm chip with event in

ISL12X9 have additional pins EVIN and #EVDET for tamper detection, while the

ISL1208 and ISL1218 do not.  They are all use the same driver with the bindings

described here, with chip specific properties as noted.

Required properties supported by the device:

 - "compatible": Should be one of the following:

		- "isil,isl1208"

		- "isil,isl1209"

		- "isil,isl1218"

		- "isil,isl1219"

 - "reg": I2C bus address of the device

Optional properties:

 - "interrupt-names": list which may contains "irq" and "evdet"

	evdet applies to isl1209 and isl1219 only

 - "interrupts": list of interrupts for "irq" and "evdet"

	evdet applies to isl1209 and isl1219 only

 - "isil,ev-evienb": Enable or disable internal pull on EVIN pin

	Applies to isl1209 and isl1219 only

	Possible values are 0 and 1

	Value 0 enables internal pull-up on evin pin, 1 disables it.

	Default will leave the non-volatile configuration of the pullup

	as is.

Example isl1219 node with #IRQ pin connected to SoC gpio1 pin12 and #EVDET pin

connected to SoC gpio2 pin 24 and internal pull-up enabled in EVIN pin.

	isl1219: rtc@68 {

		compatible = "isil,isl1219";

		reg = <0x68>;

		interrupt-names = "irq", "evdet";

		interrupts-extended = <&gpio1 12 IRQ_TYPE_EDGE_FALLING>,

			<&gpio2 24 IRQ_TYPE_EDGE_FALLING>;

		isil,ev-evienb = <1>;

	};

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/rtc/isil,isl1208.yaml#

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

title: Intersil ISL1209/19 I2C RTC/Alarm chip with event in

maintainers:

  - Biju Das <biju.das.jz@bp.renesas.com>

  - Trent Piepho <tpiepho@gmail.com>

description:

  ISL12X9 have additional pins EVIN and EVDET for tamper detection, while the

  ISL1208 and ISL1218 do not.

properties:

  compatible:

    enum:

      - isil,isl1208

      - isil,isl1209

      - isil,isl1218

      - isil,isl1219

  reg:

    maxItems: 1

  interrupts:

    minItems: 1

    maxItems: 2

  interrupt-names:

    minItems: 1

    items:

      - const: irq

      - const: evdet

  isil,ev-evienb:

    $ref: /schemas/types.yaml#/definitions/uint32

    enum: [ 0, 1 ]

    description: |

      Enable or disable internal pull on EVIN pin

      Default will leave the non-volatile configuration of the pullup

      as is.

        <0> : Enables internal pull-up on evin pin

        <1> : Disables internal pull-up on evin pin

required:

  - compatible

  - reg

allOf:

  - $ref: rtc.yaml#

  - if:

      properties:

        compatible:

          contains:

            enum:

              - isil,isl1209

              - isil,isl1219

    then:

      properties:

        interrupts:

          maxItems: 2

        interrupt-names:

          items:

            - const: irq

            - const: evdet

    else:

      properties:

        interrupts:

          maxItems: 1

        interrupt-names:

          items:

            - const: irq

unevaluatedProperties: false

examples:

  - |

    i2c {

        #address-cells = <1>;

        #size-cells = <0>;

        rtc_twi: rtc@6f {

            compatible = "isil,isl1208";

            reg = <0x6f>;

        };

    };