xref: /openbmc/linux/Documentation/devicetree/bindings/power/supply/bq24735.yaml (revision 20a72af1)

# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2021 Sebastian Reichel
%YAML 1.2
---
$id: http://devicetree.org/schemas/power/supply/bq24735.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: TI BQ24735 Li-Ion Battery Charger

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

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

properties:
  compatible:
    const: ti,bq24735

  reg:
    maxItems: 1

  interrupts:
    description: AC adapter plug event interrupt
    maxItems: 1

  ti,ac-detect-gpios:
    maxItems: 1
    description: |
      This GPIO is optionally used to read the AC adapter status. This is a Host GPIO
      that is configured as an input and connected to the ACOK pin on the bq24735.
      Note: for backwards compatibility reasons, the GPIO must be active on AC adapter
      absence despite ACOK being active (high) on AC adapter presence.

  ti,charge-current:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: |
      Used to control and set the charging current.
      This value must be between 128mA and 8.128A with a 64mA step resolution.
      The POR value is 0x0000h. This number is in mA (e.g. 8192).
      See spec for more information about the ChargeCurrent (0x14h) register.

  ti,charge-voltage:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: |
      Used to control and set the charging voltage.
      This value must be between 1.024V and 19.2V with a 16mV step resolution.
      The POR value is 0x0000h. This number is in mV (e.g. 19200).
      See spec for more information about the ChargeVoltage (0x15h) register.

  ti,input-current:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: |
      Used to control and set the charger input current.
      This value must be between 128mA and 8.064A with a 128mA step resolution.
      The POR value is 0x1000h. This number is in mA (e.g. 8064).
      See the spec for more information about the InputCurrent (0x3fh) register.

  ti,external-control:
    type: boolean
    description: |
      Indicates that the charger is configured externally and that the host should not
      attempt to enable/disable charging or set the charge voltage/current.

  poll-interval:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: |
      If 'interrupts' is not specified, poll AC adapter presence with this interval (milliseconds).

required:
  - compatible
  - reg

additionalProperties: false

examples:
  - |
    #include <dt-bindings/gpio/gpio.h>

    i2c {
      #address-cells = <1>;
      #size-cells = <0>;

      charger@9 {
        compatible = "ti,bq24735";
        reg = <0x9>;
        ti,ac-detect-gpios = <&gpio 72 0x1>;
      };
    };