xref: /openbmc/linux/Documentation/devicetree/bindings/power/supply/bq25890.yaml (revision 1ac731c529cd4d6adbce134754b51ff7d822b145)

# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2021 Sebastian Reichel
%YAML 1.2
---
$id: http://devicetree.org/schemas/power/supply/bq25890.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Bq25890, bq25892, bq25895 and bq25896 Li-Ion Charger

maintainers:
  - Sebastian Reichel <sre@kernel.org>

allOf:
  - $ref: power-supply.yaml#

properties:
  compatible:
    oneOf:
      - enum:
          - ti,bq25890
      - items:
          - enum:
              - ti,bq25892
              - ti,bq25895
              - ti,bq25896
          - const: ti,bq25890

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  ti,battery-regulation-voltage:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: maximum charging voltage (in uV)

  ti,charge-current:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: maximum charging current (in uA)

  ti,termination-current:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: |
      charge will be terminated when current in constant-voltage phase
      drops below this value (in uA)

  ti,precharge-current:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: maximum charge current during precharge phase (in uA)

  ti,minimum-sys-voltage:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: |
      when battery is charging and it is below minimum system voltage,
      the system will be regulated above minimum-sys-voltage setting (in uV)

  ti,boost-voltage:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: VBUS voltage level in boost mode (in uV)

  ti,boost-max-current:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: maximum allowed current draw in boost mode (in uA)

  ti,boost-low-freq:
    description: boost mode frequency will be 500kHz, otherwise 1.5MHz
    type: boolean

  ti,use-ilim-pin:
    description: |
      ILIM resistor will be used and the input current will be the lower
      between the resistor setting and the IINLIM register setting
    type: boolean

  ti,thermal-regulation-threshold:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: |
      temperature above which the charge current is lowered, to avoid overheating
      (in degrees Celsius). If omitted, the default setting will be used (120 degrees)

  ti,ibatcomp-micro-ohms:
    description: value of a resistor in series with the battery (in Micro Ohms)

  ti,ibatcomp-clamp-microvolt:
    description: max. charging voltage adjustment due to expected voltage drop on in-series resistor

required:
  - compatible
  - reg
  - interrupts
  - ti,battery-regulation-voltage
  - ti,charge-current
  - ti,termination-current
  - ti,precharge-current
  - ti,minimum-sys-voltage
  - ti,boost-voltage
  - ti,boost-max-current

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/irq.h>
    i2c {
      #address-cells = <1>;
      #size-cells = <0>;

      charger@6a {
        compatible = "ti,bq25890";
        reg = <0x6a>;

        interrupt-parent = <&gpio1>;
        interrupts = <16 IRQ_TYPE_EDGE_FALLING>;

        ti,battery-regulation-voltage = <4200000>;
        ti,charge-current = <1000000>;
        ti,termination-current = <50000>;
        ti,precharge-current = <128000>;
        ti,minimum-sys-voltage = <3600000>;
        ti,boost-voltage = <5000000>;
        ti,boost-max-current = <1000000>;

        ti,use-ilim-pin;
        ti,thermal-regulation-threshold = <120>;
      };
    };