Re: [PATCH v3 1/4] dt-bindings: input: Add CP2112 HID USB to SMBus Bridge

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On Mon, Feb 6, 2023 at 1:59 AM Krzysztof Kozlowski
<krzysztof.kozlowski@xxxxxxxxxx> wrote:
>
> On 05/02/2023 15:54, Danny Kaehn wrote:
> > This is a USB HID device which includes an I2C controller and 8 GPIO pins.
>
> I actually wonder - which part of CP2112 is input or HID related? The
> manufacturer advertises it as USB to SMBus bridge, so it is an I2C
> controller, thus should be in i2c directory.
>

That's a great point - - the device is technically a USB HID device,
and since HID is usually used for input devices, it's lumped in with
hid and input devices on the driver tree. Though, since dt bindings
and Linux are separate, I see how it would make sense to classify it
differently on the bindings side. Though I wonder, since it has both
an i2c controller and gpio controller, should it go under mfd? Or,
since i2c is its "primary" use, going under i2c would be fine?

Thanks,

Danny Kaehn



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