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 7title: Binding for LTC2941, LTC2942, LTC2943 and LTC2944 battery fuel gauges 8 9description: | 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 16maintainers: 17 - Sebastian Reichel <sre@kernel.org> 18 19allOf: 20 - $ref: power-supply.yaml# 21 22properties: 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 47required: 48 - compatible 49 - reg 50 - lltc,resistor-sense 51 - lltc,prescaler-exponent 52 53additionalProperties: false 54 55examples: 56 - | 57 i2c0 { 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 }; 67