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079a015b5a
This is a USB HID device which includes an I2C controller and 8 GPIO pins. The binding allows describing the chip's gpio and i2c controller in DT, with the i2c controller being bound to a subnode named "i2c". This is intended to be used in configurations where the CP2112 is permanently connected in hardware. Signed-off-by: Danny Kaehn <danny.kaehn@plexus.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Andi Shyti <andi.shyti@kernel.org> Link: https://lore.kernel.org/r/20260127-cp2112-dt-v13-1-6448ddd4bf22@plexus.com
101 lines
2.3 KiB
YAML
101 lines
2.3 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/i2c/silabs,cp2112.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: CP2112 HID USB to SMBus/I2C Bridge
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maintainers:
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- Danny Kaehn <danny.kaehn@plexus.com>
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description:
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The CP2112 is a USB HID device which includes an integrated I2C controller
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and 8 GPIO pins. Its GPIO pins can each be configured as inputs, open-drain
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outputs, or push-pull outputs.
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properties:
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compatible:
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const: usb10c4,ea90
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reg:
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maxItems: 1
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description: The USB port number
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interrupt-controller: true
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"#interrupt-cells":
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const: 2
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gpio-controller: true
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"#gpio-cells":
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const: 2
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gpio-line-names:
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minItems: 1
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maxItems: 8
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i2c:
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description: The SMBus/I2C controller node for the CP2112
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$ref: /schemas/i2c/i2c-controller.yaml#
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unevaluatedProperties: false
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properties:
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clock-frequency:
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minimum: 10000
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default: 100000
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maximum: 400000
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patternProperties:
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"-hog(-[0-9]+)?$":
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type: object
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required:
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- gpio-hog
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required:
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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#include <dt-bindings/gpio/gpio.h>
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usb {
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#address-cells = <1>;
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#size-cells = <0>;
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cp2112: device@1 {
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compatible = "usb10c4,ea90";
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reg = <1>;
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gpio-controller;
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interrupt-controller;
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#interrupt-cells = <2>;
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#gpio-cells = <2>;
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gpio-line-names = "CP2112_SDA", "CP2112_SCL", "TEST2",
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"TEST3","TEST4", "TEST5", "TEST6";
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fan-rst-hog {
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gpio-hog;
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gpios = <7 GPIO_ACTIVE_HIGH>;
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output-high;
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line-name = "FAN_RST";
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};
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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sda-gpios = <&cp2112 0 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
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scl-gpios = <&cp2112 1 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
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temp@48 {
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compatible = "national,lm75";
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reg = <0x48>;
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};
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};
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};
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};
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