Describe the bug

#87988 introduced a zero-current-offset, useful for hall sensors.
#95588 then rewrote the conversion algorithm from milliamps to microamps and forgot to include said zero-current-offset, breaking all peripherals that use said offset.

For my device, I use a CC6920BSO-5A, which has a sensitivity of 264 mA/V.

I use the following device tree node:

 curr_sens: curr_sens { compatible = "current-sense-amplifier"; io-channels = <&adc1 0>; sense-resistor-milli-ohms = <1>; sense-gain-mult = <264>; zero-current-voltage-mv = <1650>; }; 

I consume about 1.1A and get the following debug output:

[00:00:05.420,000] <inf> current_amp: 1667/4095, 1343041 uV, current:5087276 uA u 

I then patched current_sense_amplifier_scale_ua_dt and added:

temp = temp - 1000 * (int64_t)(spec->zero_current_voltage_mv);

... and now it works:

[00:00:21.368,000] <inf> current_amp: 1664/4095, 1340625 uV, current:-1171875 uA 

Regression

• This is a regression.

Steps to reproduce

Not that easy, I don't know of a dev board with a built in hall sensor. It's very trivial to reproduce logically, the offset calculation in current_sense_amplifier_scale_dt is simply missing in current_sense_amplifier_scale_ua_dt.

Relevant log output

Impact

Functional Limitation – Some features not working as expected, but system usable.

Environment

Zephyr v4.3.0

Additional Context

No response