On Tue, Jan 21, 2025 at 12:38 AM Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > > 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 > Hi Guenter, In our use case, the shunt voltage is less than 1 mv most of the time. I would like to get your advice on the correct way of getting microvolt reading from the driver? Thank you. Best regards, Potin
