1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/input/allwi
5 $schema: http://devicetree.org/meta-schemas/co
6
7 title: Allwinner A10 LRADC
8
9 maintainers:
10 - Chen-Yu Tsai <wens@csie.org>
11 - Maxime Ripard <mripard@kernel.org>
12
13 properties:
14 compatible:
15 oneOf:
16 - const: allwinner,sun4i-a10-lradc-keys
17 - const: allwinner,sun8i-a83t-r-lradc
18 - items:
19 - enum:
20 - allwinner,suniv-f1c100s-lradc
21 - allwinner,sun50i-a64-lradc
22 - const: allwinner,sun8i-a83t-r-lrad
23 - const: allwinner,sun50i-r329-lradc
24 - items:
25 - enum:
26 - allwinner,sun50i-h616-lradc
27 - allwinner,sun20i-d1-lradc
28 - const: allwinner,sun50i-r329-lradc
29
30 reg:
31 maxItems: 1
32
33 clocks:
34 maxItems: 1
35
36 resets:
37 maxItems: 1
38
39 interrupts:
40 maxItems: 1
41
42 vref-supply:
43 description:
44 Regulator for the LRADC reference voltag
45
46 wakeup-source: true
47
48 patternProperties:
49 "^button-[0-9]+$":
50 type: object
51 $ref: input.yaml#
52 properties:
53 label:
54 description: Descriptive name of the k
55
56 linux,code: true
57
58 channel:
59 $ref: /schemas/types.yaml#/definitions
60 enum: [0, 1]
61 description: ADC Channel this key is a
62
63 voltage:
64 $ref: /schemas/types.yaml#/definitions
65 description:
66 Voltage in microvolts at LRADC input
67 pressed
68
69 required:
70 - label
71 - linux,code
72 - channel
73 - voltage
74
75 additionalProperties: false
76
77 required:
78 - compatible
79 - reg
80 - interrupts
81 - vref-supply
82
83 if:
84 properties:
85 compatible:
86 contains:
87 enum:
88 - allwinner,sun50i-r329-lradc
89
90 then:
91 required:
92 - clocks
93 - resets
94
95 additionalProperties: false
96
97 examples:
98 - |
99 lradc: lradc@1c22800 {
100 compatible = "allwinner,sun4i-a10-lrad
101 reg = <0x01c22800 0x100>;
102 interrupts = <31>;
103 vref-supply = <®_vcc3v0>;
104
105 button-191 {
106 label = "Volume Up";
107 linux,code = <115>;
108 channel = <0>;
109 voltage = <191274>;
110 };
111
112 button-392 {
113 label = "Volume Down";
114 linux,code = <114>;
115 channel = <0>;
116 voltage = <392644>;
117 };
118 };
119
120 ...
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