1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/iio/potentiostat/ti,lmp91000.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Texas Instruments LMP91000 series of potentiostats with I2C control
8
9 maintainers:
10 - Matt Ranostay <matt.ranostay@konsulko.com>
11
12 description: |
13 Typically used as a signal conditioner for chemical sensors.
14 LMP91000: https://www.ti.com/lit/ds/symlink/lmp91000.pdf
15 LMP91002: https://www.ti.com/lit/ds/symlink/lmp91002.pdf
16
17 properties:
18 compatible:
19 enum:
20 - ti,lmp91000
21 - ti,lmp91002
22
23 reg:
24 maxItems: 1
25
26 io-channels:
27 maxItems: 1
28
29 ti,external-tia-resistor:
30 $ref: /schemas/types.yaml#/definitions/flag
31 description:
32 If the property ti,tia-gain-ohm is not defined this needs to be set to
33 signal that an external resistor value is being used.
34
35 ti,tia-gain-ohm:
36 $ref: /schemas/types.yaml#/definitions/uint32
37 enum: [2750, 3500, 7000, 14000, 35000, 120000, 350000]
38 description:
39 Internal resistor for the transimpedance amplifier.
40
41 ti,rload-ohm:
42 $ref: /schemas/types.yaml#/definitions/uint32
43 enum: [10, 33, 50, 100]
44 description:
45 Internal resistor load applied to the gas sensor.
46 Default 100 Ohms.
47
48 required:
49 - compatible
50 - reg
51 - io-channels
52
53 additionalProperties: false
54
55 examples:
56 - |
57 i2c {
58 #address-cells = <1>;
59 #size-cells = <0>;
60 lmp91000@48 {
61 compatible = "ti,lmp91000";
62 reg = <0x48>;
63 ti,tia-gain-ohm = <7000>;
64 ti,rload-ohm = <100>;
65 io-channels = <&adc>;
66 };
67 };
68 ...
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