Re: [PATCH v7 2/2] iio: adc: add MAX40080 current-sense amplifier driver

[Siratul Islam]

August 18, 2026 at 8:29 PM, "Stefan Popa" <stefan.popa@xxxxxxxxxx> wrote:


> 
> The MAX40080 is a bidirectional current-sense amplifier with an
> integrated 12-bit ADC and an I2C/SMBus interface. It measures the
> voltage across an external shunt resistor and the input bus voltage,
> storing the results in an internal FIFO.
> 
> Add a direct-mode IIO driver exposing the current and voltage channels
> with raw, scale and hardware-gain attributes, a configurable
> oversampling (digital averaging) ratio, and PEC-protected register
> access. The current scale is derived from the shunt resistor value
> described in the device tree.
> 
> The driver operates in single-measurement mode: each raw read triggers
> an on-demand conversion via SMBus Quick Command and returns a matched
> current/voltage pair. This avoids the latency and complexity of the
> continuous FIFO mode while ensuring each read reflects the current
> state. The two selectable current-sense ranges are exposed through
> scale/scale_available.
> 
> Continuous FIFO buffering, threshold events and the alert interrupt are
> intentionally left out of this initial submission and may be added
> later.
> 
> Co-developed-by: Ciprian Hegbeli <ciprian.hegbeli@xxxxxxxxxx>
> Signed-off-by: Ciprian Hegbeli <ciprian.hegbeli@xxxxxxxxxx>
> Signed-off-by: Stefan Popa <stefan.popa@xxxxxxxxxx>
> ---
>
Looks like my concerns have been addressed. Assuming you are going to send v8 with
fixes for Andy and Jonathan, feel free to add my tag.

Reviewed-by: Siratul Islam <siratul.islam@xxxxxxxxx>