xref: /openbmc/linux/Documentation/devicetree/bindings/input/allwinner,sun4i-a10-lradc-keys.yaml (revision 4081b335592a46d506e9ab5725ba8d7cd8cea1d9) 
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/input/allwinner,sun4i-a10-lradc-keys.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Allwinner A10 LRADC Device Tree Bindings
8
9maintainers:
10  - Chen-Yu Tsai <wens@csie.org>
11  - Maxime Ripard <mripard@kernel.org>
12
13properties:
14  compatible:
15    oneOf:
16      - const: allwinner,sun4i-a10-lradc-keys
17      - const: allwinner,sun8i-a83t-r-lradc
18      - items:
19        - const: allwinner,sun50i-a64-lradc
20        - const: allwinner,sun8i-a83t-r-lradc
21
22  reg:
23    maxItems: 1
24
25  interrupts:
26    maxItems: 1
27
28  vref-supply:
29    description:
30      Regulator for the LRADC reference voltage
31
32patternProperties:
33  "^button-[0-9]+$":
34    type: object
35    properties:
36      label:
37        $ref: /schemas/types.yaml#/definitions/string
38        description: Descriptive name of the key
39
40      linux,code:
41        $ref: /schemas/types.yaml#/definitions/uint32
42        description: Keycode to emit
43
44      channel:
45        allOf:
46          - $ref: /schemas/types.yaml#/definitions/uint32
47          - enum: [0, 1]
48        description: ADC Channel this key is attached to
49
50      voltage:
51        $ref: /schemas/types.yaml#/definitions/uint32
52        description:
53          Voltage in microvolts at LRADC input when this key is
54          pressed
55
56    required:
57      - label
58      - linux,code
59      - channel
60      - voltage
61
62    additionalProperties: false
63
64required:
65  - compatible
66  - reg
67  - interrupts
68  - vref-supply
69
70additionalProperties: false
71
72examples:
73  - |
74    lradc: lradc@1c22800 {
75        compatible = "allwinner,sun4i-a10-lradc-keys";
76        reg = <0x01c22800 0x100>;
77        interrupts = <31>;
78        vref-supply = <&reg_vcc3v0>;
79
80        button-191 {
81            label = "Volume Up";
82            linux,code = <115>;
83            channel = <0>;
84            voltage = <191274>;
85        };
86
87        button-392 {
88            label = "Volume Down";
89            linux,code = <114>;
90            channel = <0>;
91            voltage = <392644>;
92        };
93    };
94
95...
96