1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/input/iqs62x-keys.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Azoteq IQS620A/621/622/624/625 Keys and Switches
8
9maintainers:
10  - Jeff LaBundy <jeff@labundy.com>
11
12description: |
13  The Azoteq IQS620A, IQS621, IQS622, IQS624 and IQS625 multi-function sensors
14  feature a variety of self-capacitive, mutual-inductive and Hall-effect sens-
15  ing capabilities that can facilitate a variety of contactless key and switch
16  applications.
17
18  These functions are collectively represented by a "keys" child node from the
19  parent MFD driver. See Documentation/devicetree/bindings/mfd/iqs62x.yaml for
20  further details and examples. Sensor hardware configuration (self-capacitive
21  vs. mutual-inductive, etc.) is selected based on the device's firmware.
22
23properties:
24  compatible:
25    enum:
26      - azoteq,iqs620a-keys
27      - azoteq,iqs621-keys
28      - azoteq,iqs622-keys
29      - azoteq,iqs624-keys
30      - azoteq,iqs625-keys
31
32  linux,keycodes:
33    $ref: /schemas/types.yaml#/definitions/uint32-array
34    minItems: 1
35    maxItems: 16
36    description: |
37      Specifies the numeric keycodes associated with each available touch or
38      proximity event according to the following table. An 'x' indicates the
39      event is supported for a given device. Specify 0 for unused events.
40
41      -------------------------------------------------------------------------
42      | #  | Event              | IQS620A | IQS621 | IQS622 | IQS624 | IQS625 |
43      -------------------------------------------------------------------------
44      | 0  | CH0 Touch          |    x    |    x   |    x   |    x   |    x   |
45      |    | Antenna 1 Touch*   |    x    |        |        |        |        |
46      -------------------------------------------------------------------------
47      | 1  | CH0 Proximity      |    x    |    x   |    x   |    x   |    x   |
48      |    | Antenna 1 Prox.*   |    x    |        |        |        |        |
49      -------------------------------------------------------------------------
50      | 2  | CH1 Touch          |    x    |    x   |    x   |    x   |    x   |
51      |    | Ant. 1 Deep Touch* |    x    |        |        |        |        |
52      -------------------------------------------------------------------------
53      | 3  | CH1 Proximity      |    x    |    x   |    x   |    x   |    x   |
54      -------------------------------------------------------------------------
55      | 4  | CH2 Touch          |    x    |        |        |        |        |
56      -------------------------------------------------------------------------
57      | 5  | CH2 Proximity      |    x    |        |        |        |        |
58      |    | Antenna 2 Prox.*   |    x    |        |        |        |        |
59      -------------------------------------------------------------------------
60      | 6  | Metal (+) Touch**  |    x    |    x   |        |        |        |
61      |    | Ant. 2 Deep Touch* |    x    |        |        |        |        |
62      -------------------------------------------------------------------------
63      | 7  | Metal (+) Prox.**  |    x    |    x   |        |        |        |
64      |    | Antenna 2 Touch*   |    x    |        |        |        |        |
65      -------------------------------------------------------------------------
66      | 8  | Metal (-) Touch**  |    x    |    x   |        |        |        |
67      -------------------------------------------------------------------------
68      | 9  | Metal (-) Prox.**  |    x    |    x   |        |        |        |
69      -------------------------------------------------------------------------
70      | 10 | SAR Active***      |    x    |        |    x   |        |        |
71      -------------------------------------------------------------------------
72      | 11 | SAR Quick Rel.***  |    x    |        |    x   |        |        |
73      -------------------------------------------------------------------------
74      | 12 | SAR Movement***    |    x    |        |    x   |        |        |
75      -------------------------------------------------------------------------
76      | 13 | SAR Filter Halt*** |    x    |        |    x   |        |        |
77      -------------------------------------------------------------------------
78      | 14 | Wheel Up           |         |        |        |    x   |        |
79      -------------------------------------------------------------------------
80      | 15 | Wheel Down         |         |        |        |    x   |        |
81      -------------------------------------------------------------------------
82      *   Two-channel SAR. Replaces CH0-2 plus metal touch and proximity events
83          if enabled via firmware.
84      **  "+" and "-" refer to the polarity of a channel's delta (LTA - counts),
85          where "LTA" is defined as the channel's long-term average.
86      *** One-channel SAR. Replaces CH0-2 touch and proximity events if enabled
87          via firmware.
88
89patternProperties:
90  "^hall-switch-(north|south)$":
91    type: object
92    description:
93      Represents north/south-field Hall-effect sensor touch or proximity
94      events. Note that north/south-field orientation is reversed on the
95      IQS620AXzCSR device due to its flip-chip package.
96
97    properties:
98      linux,code:
99        $ref: /schemas/types.yaml#/definitions/uint32
100        description: Numeric switch code associated with the event.
101
102      azoteq,use-prox:
103        $ref: /schemas/types.yaml#/definitions/flag
104        description:
105          If present, specifies that Hall-effect sensor reporting should
106          use the device's wide-range proximity threshold instead of its
107          close-range touch threshold (default).
108
109    required:
110      - linux,code
111
112    additionalProperties: false
113
114if:
115  properties:
116    compatible:
117      contains:
118        enum:
119          - azoteq,iqs624-keys
120          - azoteq,iqs625-keys
121then:
122  patternProperties:
123    "^hall-switch-(north|south)$": false
124
125required:
126  - compatible
127  - linux,keycodes
128
129additionalProperties: false
130
131...
132