Bindings/power/supply/lltc,ltc294x.yaml

   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     };