xref: /linux/Documentation/devicetree/bindings/hwmon/adt7475.yaml (revision 7ae9fb1b7ecbb5d85d07857943f677fd1a559b18) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/hwmon/adt7475.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: ADT7475 hwmon sensor
8
9maintainers:
10  - Jean Delvare <jdelvare@suse.com>
11
12description: |
13  The ADT7473, ADT7475, ADT7476, and ADT7490 are thermal monitors and multiple
14  PWN fan controllers.
15
16  They support monitoring and controlling up to four fans (the ADT7490 can only
17  control up to three). They support reading a single on chip temperature
18  sensor and two off chip temperature sensors (the ADT7490 additionally
19  supports measuring up to three current external temperature sensors with
20  series resistance cancellation (SRC)).
21
22  Datasheets:
23  https://www.onsemi.com/pub/Collateral/ADT7473-D.PDF
24  https://www.onsemi.com/pub/Collateral/ADT7475-D.PDF
25  https://www.onsemi.com/pub/Collateral/ADT7476-D.PDF
26  https://www.onsemi.com/pub/Collateral/ADT7490-D.PDF
27
28  Description taken from onsemiconductors specification sheets, with minor
29  rephrasing.
30
31properties:
32  compatible:
33    enum:
34      - adi,adt7473
35      - adi,adt7475
36      - adi,adt7476
37      - adi,adt7490
38
39  reg:
40    maxItems: 1
41
42  adi,pwm-active-state:
43    description: |
44      Integer array, represents the active state of the pwm outputs If set to 0
45      the pwm uses a logic low output for 100% duty cycle. If set to 1 the pwm
46      uses a logic high output for 100% duty cycle.
47    $ref: /schemas/types.yaml#/definitions/uint32-array
48    minItems: 3
49    maxItems: 3
50    items:
51      enum: [0, 1]
52      default: 1
53
54patternProperties:
55  "^adi,bypass-attenuator-in[0-4]$":
56    description: |
57      Configures bypassing the individual voltage input attenuator. If
58      set to 1 the attenuator is bypassed if set to 0 the attenuator is
59      not bypassed. If the property is absent then the attenuator
60      retains its configuration from the bios/bootloader.
61    $ref: /schemas/types.yaml#/definitions/uint32
62    enum: [0, 1]
63
64  "^adi,pin(5|10)-function$":
65    description: |
66      Configures the function for pin 5 on the adi,adt7473 and adi,adt7475. Or
67      pin 10 on the adi,adt7476 and adi,adt7490.
68    $ref: /schemas/types.yaml#/definitions/string
69    enum:
70      - pwm2
71      - smbalert#
72
73  "^adi,pin(9|14)-function$":
74    description: |
75      Configures the function for pin 9 on the adi,adt7473 and adi,adt7475. Or
76      pin 14 on the adi,adt7476 and adi,adt7490
77    $ref: /schemas/types.yaml#/definitions/string
78    enum:
79      - tach4
80      - therm#
81      - smbalert#
82      - gpio
83
84required:
85  - compatible
86  - reg
87
88additionalProperties: false
89
90examples:
91  - |
92    i2c {
93      #address-cells = <1>;
94      #size-cells = <0>;
95
96      hwmon@2e {
97        compatible = "adi,adt7476";
98        reg = <0x2e>;
99        adi,bypass-attenuator-in0 = <1>;
100        adi,bypass-attenuator-in1 = <0>;
101        adi,pwm-active-state = <1 0 1>;
102        adi,pin10-function = "smbalert#";
103        adi,pin14-function = "tach4";
104      };
105    };
106