dts/bindings/comparator/nordic,nrf-comp.yaml

# Copyright (c) 2024 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0

description: |
  Nordic nRF COMP (analog COMParator)

  This comparator has varying configurations which require varying
  properties be set in the devicetree.

  The following example displays the minimum node layout:

    comp: comp@deadbeef {
            compatible = "nordic,nrf-comp";
            reg = <0xdeadbeef 0x1000>;
            interrupts = <0 NRF_DEFAULT_IRQ_PRIORITY>;
            status = "disabled";
    };

  Enabling the comparator node requires setting the default
  configuration of the comparator.

  The following example displays enabling the comparator in
  single-ended mode, selecting an internal reference:

    &comp {
            status = "okay";
            main-mode = "SE";
            psel = "AIN0";
            refsel = "INT_1V2";
            sp-mode = "NORMAL";
            th-up = <36>;
            th-down = <30>;
            isource = "OFF";
    };

  To select an external reference, select the "AREF"
  reference and add the external reference:

    &comp {
            ...
            refsel = "AREF";
            extrefsel = "AIN1";
            ...
    };

  The following example displays enabling the comparator
  in differential mode:

    &comp {
            status = "okay";
            main-mode = "DIFF";
            psel = "AIN0";
            extrefsel = "AIN1";
            sp-mode = "NORMAL";
            hyst = "50MV";
            isource = "OFF";
    };

compatible: "nordic,nrf-comp"

include: base.yaml

properties:
  main-mode:
    type: string
    enum:
      - "SE"
      - "DIFF"

  psel:
    type: string
    enum:
      - "AIN0"
      - "AIN1"
      - "AIN2"
      - "AIN3"
      - "AIN4"
      - "AIN5"
      - "AIN6"
      - "AIN7"
      - "VDD_DIV2"
      - "VDDH_DIV5"

  extrefsel:
    type: string
    enum:
      - "AIN0"
      - "AIN1"
      - "AIN2"
      - "AIN3"
      - "AIN4"
      - "AIN5"
      - "AIN6"
      - "AIN7"

  refsel:
    type: string
    enum:
      - "INT_1V2"
      - "INT_1V8"
      - "INT_2V4"
      - "AVDDAO1V8"
      - "VDD"
      - "AREF"

  enable-hyst:
    type: boolean

  sp-mode:
    type: string
    enum:
      - "LOW"
      - "NORMAL"
      - "HIGH"

  th-up:
    type: int

  th-down:
    type: int

  isource:
    type: string
    enum:
      - "DISABLED"
      - "2UA5"
      - "5UA"
      - "10UA"