Re: [PATCH] hwmon: ina238: Add support for shunt voltage scaling

[Guenter Roeck]

On 1/20/25 08:23, Potin Lai wrote:
> The INA238 sensor reports shunt voltage with microvolt precision.
> However, the hwmon driver currently exposes this value only in
> millivolts via `in0_input`, which results in a loss of precision for
> readings within the range of ±1 mV.
>
> This patch introduces an `in0_scale` attribute to provide the scaling
> factor applied to the shunt voltage reading. By exposing this attribute,
> users can accurately interpret the in0_input values in microvolts,
> preserving the sensor's full precision.
>
> Signed-off-by: Potin Lai <potin.lai.pt@xxxxxxxxx>

Sorry, this is an ABI violation and thus a no-go. in0_input is and will
always be reported in mV.

Guenter