xref: /linux/Documentation/devicetree/bindings/i2c/silabs,cp2112.yaml (revision 99e447220b938dfed6488db95a2930b57ea849ba)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/i2c/silabs,cp2112.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: CP2112 HID USB to SMBus/I2C Bridge

maintainers:
  - Danny Kaehn <danny.kaehn@plexus.com>

description:
  The CP2112 is a USB HID device which includes an integrated I2C controller
  and 8 GPIO pins. Its GPIO pins can each be configured as inputs, open-drain
  outputs, or push-pull outputs.

properties:
  compatible:
    const: usb10c4,ea90

  reg:
    maxItems: 1
    description: The USB port number

  interrupt-controller: true
  "#interrupt-cells":
    const: 2

  gpio-controller: true
  "#gpio-cells":
    const: 2

  gpio-line-names:
    minItems: 1
    maxItems: 8

  i2c:
    description: The SMBus/I2C controller node for the CP2112
    $ref: /schemas/i2c/i2c-controller.yaml#
    unevaluatedProperties: false

    properties:
      clock-frequency:
        minimum: 10000
        default: 100000
        maximum: 400000

patternProperties:
  "-hog(-[0-9]+)?$":
    type: object

    required:
      - gpio-hog

required:
  - compatible
  - reg

additionalProperties: false

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

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

        cp2112: device@1 {
            compatible = "usb10c4,ea90";
            reg = <1>;

            gpio-controller;
            interrupt-controller;
            #interrupt-cells = <2>;
            #gpio-cells = <2>;
            gpio-line-names = "CP2112_SDA", "CP2112_SCL", "TEST2",
                              "TEST3","TEST4", "TEST5", "TEST6";

            fan-rst-hog {
                gpio-hog;
                gpios = <7 GPIO_ACTIVE_HIGH>;
                output-high;
                line-name = "FAN_RST";
            };

            i2c {
                #address-cells = <1>;
                #size-cells = <0>;
                sda-gpios = <&cp2112 0 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
                scl-gpios = <&cp2112 1 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;

                temp@48 {
                    compatible = "national,lm75";
                    reg = <0x48>;
                };
            };
        };
    };