1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/ti,ads1015.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: TI ADS1015/ADS1115 4 channel I2C analog to digital converter
8
9 maintainers:
10 - Daniel Baluta <daniel.baluta@nxp.com>
11
12 description: |
13 Datasheet at: https://www.ti.com/lit/gpn/ads1015
14 Supports both single ended and differential channels.
15
16 properties:
17 compatible:
18 enum:
19 - ti,ads1015
20 - ti,ads1115
21 - ti,tla2021
22 - ti,tla2024
23
24 reg:
25 maxItems: 1
26
27 interrupts:
28 maxItems: 1
29
30 "#address-cells":
31 const: 1
32
33 "#size-cells":
34 const: 0
35
36 "#io-channel-cells":
37 const: 1
38
39 required:
40 - compatible
41 - reg
42 - "#address-cells"
43 - "#size-cells"
44
45 additionalProperties: false
46
47 patternProperties:
48 "^channel@[0-7]+$":
49 type: object
50 additionalProperties: false
51 description:
52 Child nodes needed for each channel that the platform uses.
53
54 properties:
55 reg:
56 description: |
57 0: Voltage over AIN0 and AIN1.
58 1: Voltage over AIN0 and AIN3.
59 2: Voltage over AIN1 and AIN3.
60 3: Voltage over AIN2 and AIN3.
61 4: Voltage over AIN0 and GND.
62 5: Voltage over AIN1 and GND.
63 6: Voltage over AIN2 and GND.
64 7: Voltage over AIN3 and GND.
65 items:
66 - minimum: 0
67 maximum: 7
68
69 ti,gain:
70 $ref: /schemas/types.yaml#/definitions/uint32
71 minimum: 0
72 maximum: 5
73 description: |
74 pga is the programmable gain amplifier (values are full scale)
75 0: +/- 6.144 V
76 1: +/- 4.096 V
77 2: +/- 2.048 V (default)
78 3: +/- 1.024 V
79 4: +/- 0.512 V
80 5: +/- 0.256 V
81
82 ti,datarate:
83 $ref: /schemas/types.yaml#/definitions/uint32
84 minimum: 0
85 maximum: 7
86 description: |
87 Data acquisition rate in samples per second for ADS1015, TLA2024
88 0: 128
89 1: 250
90 2: 490
91 3: 920
92 4: 1600 (default)
93 5: 2400
94 6: 3300
95 7: 3300
96
97 Data acquisition rate in samples per second for ADS1115
98 0: 8
99 1: 16
100 2: 32
101 3: 64
102 4: 128 (default)
103 5: 250
104 6: 475
105 7: 860
106
107 required:
108 - reg
109
110 examples:
111 - |
112 i2c {
113 #address-cells = <1>;
114 #size-cells = <0>;
115
116 adc@49 {
117 compatible = "ti,ads1015";
118 reg = <0x49>;
119 #address-cells = <1>;
120 #size-cells = <0>;
121 channel@0 {
122 reg = <0>;
123 };
124 channel@4 {
125 reg = <4>;
126 ti,gain = <3>;
127 ti,datarate = <5>;
128 };
129 };
130 };
131 ...
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