67 lines
1.8 KiB
YAML
67 lines
1.8 KiB
YAML
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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/power/supply/lltc,ltc294x.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Binding for LTC2941, LTC2942, LTC2943 and LTC2944 battery fuel gauges
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description: |
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All chips measure battery capacity.
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The LTC2942 is pin compatible with the LTC2941, it adds voltage and
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temperature monitoring, and is runtime detected. LTC2943 and LTC2944
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are software compatible, uses a slightly different conversion formula
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for the charge counter and adds voltage, current and temperature monitoring.
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maintainers:
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- Sebastian Reichel <sre@kernel.org>
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allOf:
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- $ref: power-supply.yaml#
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properties:
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compatible:
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enum:
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- lltc,ltc2941
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- lltc,ltc2942
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- lltc,ltc2943
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- lltc,ltc2944
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reg:
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maxItems: 1
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lltc,resistor-sense:
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$ref: /schemas/types.yaml#/definitions/int32
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description: |
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Sense resistor value in milli-ohms.
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Can be negative value when the battery has been connected to the wrong end of the resistor.
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lltc,prescaler-exponent:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: |
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The prescaler exponent as explained in the datasheet.
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This determines the range and accuracy of the gauge.
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The value is programmed into the chip only if it differs from the current setting.
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The setting is lost when the battery is disconnected.
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required:
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- compatible
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- reg
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- lltc,resistor-sense
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- lltc,prescaler-exponent
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additionalProperties: false
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examples:
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- |
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i2c0 {
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#address-cells = <1>;
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#size-cells = <0>;
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battery@64 {
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compatible = "lltc,ltc2943";
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reg = <0x64>;
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lltc,resistor-sense = <15>;
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lltc,prescaler-exponent = <5>; /* 2^(2*5) = 1024 */
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};
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};
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