xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml

# 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

  clocks:
    maxItems: 1

  clock-names:
    description: |
      Use xin, if connected to an external crystal.
      Use clkin, if connected to an external clock signal.
    enum:
      - xin
      - clkin

  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>;
        };
    };