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