1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/power/supply/lltc,ltc294x.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: LTC2941, LTC2942, LTC2943 and LTC2944 battery fuel gauges
8
9 description: |
10 All chips measure battery capacity.
11 The LTC2942 is pin compatible with the LTC2941, it adds voltage and
12 temperature monitoring, and is runtime detected. LTC2943 and LTC2944
13 are software compatible, uses a slightly different conversion formula
14 for the charge counter and adds voltage, current and temperature monitoring.
15
16 maintainers:
17 - Sebastian Reichel <sre@kernel.org>
18
19 allOf:
20 - $ref: power-supply.yaml#
21
22 properties:
23 compatible:
24 enum:
25 - lltc,ltc2941
26 - lltc,ltc2942
27 - lltc,ltc2943
28 - lltc,ltc2944
29
30 reg:
31 maxItems: 1
32
33 lltc,resistor-sense:
34 $ref: /schemas/types.yaml#/definitions/int32
35 description: |
36 Sense resistor value in milli-ohms.
37 Can be negative value when the battery has been connected to the wrong end of the resistor.
38
39 lltc,prescaler-exponent:
40 $ref: /schemas/types.yaml#/definitions/uint32
41 description: |
42 The prescaler exponent as explained in the datasheet.
43 This determines the range and accuracy of the gauge.
44 The value is programmed into the chip only if it differs from the current setting.
45 The setting is lost when the battery is disconnected.
46
47 required:
48 - compatible
49 - reg
50 - lltc,resistor-sense
51 - lltc,prescaler-exponent
52
53 additionalProperties: false
54
55 examples:
56 - |
57 i2c {
58 #address-cells = <1>;
59 #size-cells = <0>;
60 battery@64 {
61 compatible = "lltc,ltc2943";
62 reg = <0x64>;
63 lltc,resistor-sense = <15>;
64 lltc,prescaler-exponent = <5>; /* 2^(2*5) = 1024 */
65 };
66 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.