Re: [PATCH v1 2/4] iio: adc: Add support for MediaTek MT6357/8/9 Auxiliary ADC

[AngeloGioacchino Del Regno]

Il 04/06/24 12:55, Andy Shevchenko ha scritto:
> On Tue, Jun 4, 2024 at 12:42 PM AngeloGioacchino Del Regno
> <angelogioacchino.delregno@xxxxxxxxxxxxx> wrote:
> > Il 02/06/24 12:11, Jonathan Cameron ha scritto:
> > > On Thu, 30 May 2024 11:34:08 +0200
> > > AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx> wrote:
>
> ...
>
> > > What are IMP channels?
> >
> > Honestly? Well, it's called like that. I don't have any clear description of that
> > and not even datasheets are unrolling the meaning of "IMP". So.. I don't know.
> >
> > What I know is what I wrote in the driver, and this is:
> > * IMP has IBAT and VBAT ADCs
> > * It needs different handling from the other ADCs, as shown.
> >
> > ...and nothing else :-(
>
> I could speculate with confidence that this means IMPedance (since it's ADC).
>
>  From MTK6329  datasheet:
> "The hardware also includes necessary modes to allow for simultaneous
> current and voltage measurement
> which can be utilized to estimate the battery impedance."
> And googling in vendor trees also suggests the same.

That does make a lot of sense. Thanks for that, I don't have the 6329 datasheet.

Great, one more piece added to the puzzle!

Cheers,
Angelo