xref: /freebsd/sys/contrib/device-tree/Bindings/iio/adc/ti,ads1015.yaml (revision 95eb4b873b6a8b527c5bd78d7191975dfca38998) 
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
7title: TI ADS1015/ADS1115 4 channel I2C analog to digital converter
8
9maintainers:
10  - Daniel Baluta <daniel.baluta@nxp.com>
11
12description: |
13  Datasheet at: https://www.ti.com/lit/gpn/ads1015
14  Supports both single ended and differential channels.
15
16properties:
17  compatible:
18    enum:
19      - ti,ads1015
20      - ti,ads1115
21      - ti,tla2024
22
23  reg:
24    maxItems: 1
25
26  interrupts:
27    maxItems: 1
28
29  "#address-cells":
30    const: 1
31
32  "#size-cells":
33    const: 0
34
35  "#io-channel-cells":
36    const: 1
37
38required:
39  - compatible
40  - reg
41  - "#address-cells"
42  - "#size-cells"
43
44additionalProperties: false
45
46patternProperties:
47  "^channel@[0-7]+$":
48    type: object
49    additionalProperties: false
50    description:
51      Child nodes needed for each channel that the platform uses.
52
53    properties:
54      reg:
55        description: |
56          0: Voltage over AIN0 and AIN1.
57          1: Voltage over AIN0 and AIN3.
58          2: Voltage over AIN1 and AIN3.
59          3: Voltage over AIN2 and AIN3.
60          4: Voltage over AIN0 and GND.
61          5: Voltage over AIN1 and GND.
62          6: Voltage over AIN2 and GND.
63          7: Voltage over AIN3 and GND.
64        items:
65          - minimum: 0
66            maximum: 7
67
68      ti,gain:
69        $ref: /schemas/types.yaml#/definitions/uint32
70        minimum: 0
71        maximum: 5
72        description: |
73          pga is the programmable gain amplifier (values are full scale)
74          0: +/- 6.144 V
75          1: +/- 4.096 V
76          2: +/- 2.048 V (default)
77          3: +/- 1.024 V
78          4: +/- 0.512 V
79          5: +/- 0.256 V
80
81      ti,datarate:
82        $ref: /schemas/types.yaml#/definitions/uint32
83        minimum: 0
84        maximum: 7
85        description: |
86          Data acquisition rate in samples per second for ADS1015, TLA2024
87          0: 128
88          1: 250
89          2: 490
90          3: 920
91          4: 1600 (default)
92          5: 2400
93          6: 3300
94          7: 3300
95
96          Data acquisition rate in samples per second for ADS1115
97          0: 8
98          1: 16
99          2: 32
100          3: 64
101          4: 128 (default)
102          5: 250
103          6: 475
104          7: 860
105
106    required:
107      - reg
108
109examples:
110  - |
111    i2c {
112        #address-cells = <1>;
113        #size-cells = <0>;
114
115        adc@49 {
116            compatible = "ti,ads1015";
117            reg = <0x49>;
118            #address-cells = <1>;
119            #size-cells = <0>;
120            channel@0 {
121                reg = <0>;
122            };
123            channel@4 {
124                reg = <4>;
125                ti,gain = <3>;
126                ti,datarate = <5>;
127            };
128        };
129    };
130...
131