dt-bindings: power: supply: Add Richtek RT9756 smart cap divider charger

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause

%YAML 1.2

---

$id: http://devicetree.org/schemas/power/supply/richtek,rt9756.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Richtek RT9756 Smart Cap Divider Charger

maintainers:

  - ChiYuan Huang <cy_huang@richtek.com>

description: |

  The RT9756/RT9757 is a high efficiency and high charge current charger.

  The efficiency is up to 98.2% when VBAT = 4V, IBAT = 2A in DIV2 mode and 99.1%

  when VBAT=4V, IBAT=1A in bypass mode. The maximum charger current is up to 8A

  in DIV2 mode and 5A in bypass mode. The device integrates smart cap divider

  topology, direct charging mode, external over-voltage protection control, an

  input reverse blocking NFET and 2-way regulation, a dual phase charge pump

  core, 8-Channel high speed ADCs and USB BC 1.2 detection.

  RT9770 is almost the same with RT9756/57, only BC 1.2 detection function is

  removed to shrink the die size.

allOf:

  - $ref: power-supply.yaml#

properties:

  compatible:

    oneOf:

      - enum:

          - richtek,rt9756

          - richtek,rt9770

      - items:

          - enum:

              - richtek,rt9757

          - const: richtek,rt9756

  reg:

    maxItems: 1

  wakeup-source: true

  interrupts:

    maxItems: 1

  shunt-resistor-micro-ohms:

    description: Battery current sense resistor mounted.

    default: 2000

required:

  - compatible

  - reg

  - interrupts

unevaluatedProperties: false

examples:

  - |

    #include <dt-bindings/interrupt-controller/irq.h>

    i2c {

      #address-cells = <1>;

      #size-cells = <0>;

      charger@6f {

        compatible = "richtek,rt9756";

        reg = <0x6f>;

        wakeup-source;

        interrupts-extended = <&gpio_intc 32 IRQ_TYPE_EDGE_FALLING>;

        shunt-resistor-micro-ohms = <5000>;

      };

    };