Re: [RFC PATCH v1 0/2] hwmon: (iio_hwmon) optionally force iio channel type

[Guenter Roeck]

On 5/15/21 9:43 PM, Liam Beguin wrote:
> Add a devicetree binding to optionally force a different IIO channel
> type.
>
> This is useful in cases where ADC channels are connected to a circuit
> that represent another unit such as a temperature or a current.
>
> `channel-types` was chosen instead of `io-channel-types` as this is not
> part of the iio consumer bindings.
>
> In the current form, this patch does what it's intended to do:
> change the unit displayed by `sensors`, but feels like the wrong way to
> address the problem.
>
> Would it be possible to force the type of different IIO channels for
> this kind of use case with a devicetree binding from the IIO subsystem?

That doesn't make sense to me. If an ADC is used to report temperatures,
it would be a thermistor, and the ntc_thermistor driver should be used.
Not sure what to do with currents, but overriding "voltage" with "current"
seems wrong.

Guenter

> It would be convenient to do it within the IIO subsystem to have the
> right unit there too.
>
> Thanks for your time,
> Liam
>
> Liam Beguin (2):
>    hwmon: (iio_hwmon) optionally force iio channel type
>    dt-bindings: hwmon: add iio-hwmon bindings
>
>   .../devicetree/bindings/hwmon/iio-hwmon.yaml  | 41 +++++++++++++++++++
>   drivers/hwmon/iio_hwmon.c                     |  2 +
>   2 files changed, 43 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/hwmon/iio-hwmon.yaml
>
>
> base-commit: 9f4ad9e425a1d3b6a34617b8ea226d56a119a717