# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id:
http://devicetree.org/schemas/hwmon/adi,max31827.yaml#
$schema:
http://devicetree.org/meta-schemas/core.yaml#
title: Analog Devices MAX31827, MAX31828, MAX31829 Low-Power Temperature Switch
maintainers:
- Daniel Matyas <daniel.matyas@analog.com>
description: |
Analog Devices MAX31827, MAX31828, MAX31829 Low-Power Temperature Switch with
I2C Interface
https://www.analog.com/media/en/technical-documentation/data-sheets/MAX31827-MAX31829.pdf
properties:
compatible:
oneOf:
- const: adi,max31827
- items:
- enum:
- adi,max31828
- adi,max31829
- const: adi,max31827
reg:
maxItems: 1
vref-supply:
description:
Must have values in the interval (1.6V; 3.6V) in order for the device to
function correctly.
adi,comp-int:
description:
If present interrupt mode is used. If not present comparator mode is used
(default).
type: boolean
adi,alarm-pol:
description:
Sets the alarms active state.
- 0 = active low
- 1 = active high
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1]
adi,fault-q:
description:
Select how many consecutive temperature faults must occur before
overtemperature or undertemperature faults are indicated in the
corresponding status bits.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [1, 2, 4, 8]
adi,timeout-enable:
description:
Enables timeout. Bus timeout resets the I2C-compatible interface when SCL
is low for more than 30ms (nominal).
type: boolean
allOf:
- if:
properties:
compatible:
contains:
const: adi,max31829
then:
properties:
adi,alarm-pol:
default: 1
else:
properties:
adi,alarm-pol:
default: 0
- if:
properties:
compatible:
contains:
const: adi,max31827
then:
properties:
adi,fault-q:
default: 1
else:
properties:
adi,fault-q:
default: 4
required:
- compatible
- reg
- vref-supply
additionalProperties: false
examples:
- |
i2c {
#address-cells = <1>;
#size-cells = <0>;
temperature-sensor@42 {
compatible = "adi,max31827";
reg = <0x42>;
vref-supply = <®_vdd>;
adi,comp-int;
adi,alarm-pol = <0>;
adi,fault-q = <1>;
adi,timeout-enable;
};
};
...
