dt-bindings: power: supply: lp8727: Convert to DT schema format

Binding for TI/National Semiconductor LP8727 Charger

Required properties:

- compatible: "ti,lp8727"

- reg: I2C slave address 27h

Optional properties:

- interrupts: interrupt specifier (see interrupt binding[0])

- debounce-ms: interrupt debounce time. (u32)

AC and USB charging parameters

- charger-type: "ac" or "usb" (string)

- eoc-level: value of 'enum lp8727_eoc_level' (u8)

- charging-current: value of 'enum lp8727_ichg' (u8)

[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt

Example)

lp8727@27 {

	compatible = "ti,lp8727";

	reg = <0x27>;

	/* GPIO 134 is used for LP8728 interrupt pin */

	interrupt-parent = <&gpio5>; 	/* base = 128 */

	interrupts = <6 0x2>;		/* offset = 6, falling edge type */

	debounce-ms = <300>;

	/* AC charger: 5% EOC and 500mA charging current */

	ac {

		charger-type = "ac";

		eoc-level = /bits/ 8 <0>;

		charging-current = /bits/ 8 <4>;

	};

	/* USB charger: 10% EOC and 400mA charging current */

	usb {

		charger-type = "usb";

		eoc-level = /bits/ 8 <1>;

		charging-current = /bits/ 8 <2>;

	};

};

# SPDX-License-Identifier: GPL-2.0

%YAML 1.2

---

$id: http://devicetree.org/schemas/power/supply/ti,lp8727.yaml#

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

title: Binding for TI/National Semiconductor LP8727 Charger

maintainers:

  - Sebastian Reichel <sre@kernel.org>

allOf:

  - $ref: power-supply.yaml#

properties:

  compatible:

    const: ti,lp8727

  reg:

    const: 0x27

  interrupts:

    maxItems: 1

  debounce-ms:

    description: interrupt debounce time in ms

patternProperties:

  '^(ac|usb)$':

    type: object

    description: USB/AC charging parameters

    properties:

      charger-type:

        enum:

          - ac

          - usb

      eoc-level:

        $ref: /schemas/types.yaml#/definitions/uint8

        minimum: 0

        maximum: 6

        description: |

          End of Charge Percentage with the following mapping:

          0 = 5%, 1 = 10%, 2 = 16%, 3 = 20%, 4 = 25%, 5 = 33%, 6 = 50%

      charging-current:

        $ref: /schemas/types.yaml#/definitions/uint8

        minimum: 0

        maximum: 9

        description: |

          Charging current with the following mapping:

          0 = 90mA, 1 = 100mA, 2 = 400mA, 3 = 450mA, 4 = 500mA, 5 = 600mA,

          6 = 700mA, 7 = 800mA, 8 = 900mA, 9 = 1000mA

required:

  - compatible

  - reg

additionalProperties: false

examples:

  - |

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

    i2c0 {

      #address-cells = <1>;

      #size-cells = <0>;

      lp8727: charger@27 {

        compatible = "ti,lp8727";

        reg = <0x27>;

        interrupt-parent = <&gpio5>;

        interrupts = <6 IRQ_TYPE_EDGE_FALLING>;

        debounce-ms = <300>;

        /* AC charger: 5% EOC and 500mA charging current */

        ac {

          charger-type = "ac";

          eoc-level = /bits/ 8 <0>;

          charging-current = /bits/ 8 <4>;

        };

        /* USB charger: 10% EOC and 400mA charging current */

        usb {

          charger-type = "usb";

          eoc-level = /bits/ 8 <1>;

          charging-current = /bits/ 8 <2>;

        };

      };

    };