xref: /linux/Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml (revision 6e7fd890f1d6ac83805409e9c346240de2705584) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4
5$id: http://devicetree.org/schemas/hwmon/ti,ina2xx.yaml#
6$schema: http://devicetree.org/meta-schemas/core.yaml#
7
8title: Texas Instruments INA209 family of power/voltage monitors
9
10maintainers:
11  - Krzysztof Kozlowski <krzk@kernel.org>
12
13description: |
14  The INA209 is a high-side current shunt and power monitor with
15  an I2C interface.
16
17  Datasheets:
18    https://www.ti.com/product/INA209
19
20properties:
21  compatible:
22    enum:
23      - ti,ina209
24      - ti,ina219
25      - ti,ina220
26      - ti,ina226
27      - ti,ina230
28      - ti,ina231
29      - ti,ina237
30      - ti,ina238
31      - ti,ina260
32
33  reg:
34    maxItems: 1
35
36  "#io-channel-cells":
37    const: 1
38
39  shunt-resistor:
40    description:
41      Shunt resistor value in micro-Ohm.
42    $ref: /schemas/types.yaml#/definitions/uint32
43
44  ti,shunt-gain:
45    description: |
46      Programmable gain divisor for the shunt voltage accuracy and range. This
47      property only applies to devices that have configurable PGA/ADCRANGE. The
48      gain value is used configure the gain and to convert the shunt voltage,
49      current and power register values when reading measurements from the
50      device.
51
52      For devices that have a configurable PGA (e.g. INA209, INA219, INA220),
53      the gain value maps directly with the PG bits of the config register.
54
55      For devices that have ADCRANGE configuration (e.g. INA238) a shunt-gain
56      value of 1 maps to ADCRANGE=1 where no gain divisor is applied to the
57      shunt voltage, and a value of 4 maps to ADCRANGE=0 such that a wider
58      voltage range is used.
59
60      The default value is device dependent, and is defined by the reset value
61      of PGA/ADCRANGE in the respective configuration registers.
62    $ref: /schemas/types.yaml#/definitions/uint32
63    enum: [1, 2, 4, 8]
64
65  vs-supply:
66    description: phandle to the regulator that provides the VS supply typically
67      in range from 2.7 V to 5.5 V.
68
69  ti,alert-polarity-active-high:
70    description: Alert pin is asserted based on the value of Alert polarity Bit
71      of Mask/Enable register. Default value is Normal (0 which maps to
72      active-low open collector). The other value is Inverted
73      (1 which maps to active-high open collector). Specify this property to set
74      the alert polarity to active-high.
75    $ref: /schemas/types.yaml#/definitions/flag
76
77required:
78  - compatible
79  - reg
80
81allOf:
82  - $ref: hwmon-common.yaml#
83
84unevaluatedProperties: false
85
86examples:
87  - |
88    i2c {
89        #address-cells = <1>;
90        #size-cells = <0>;
91
92        power-sensor@44 {
93            compatible = "ti,ina220";
94            reg = <0x44>;
95            #io-channel-cells = <1>;
96            label = "vdd_3v0";
97            shunt-resistor = <1000>;
98            vs-supply = <&vdd_3v0>;
99            ti,alert-polarity-active-high;
100        };
101    };
102