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Message-ID: <b29594464415af0ea56b6d5431744982fa1385ee.camel@gmail.com>
Date: Fri, 27 Oct 2023 10:40:21 +0200
From: Nuno Sá <noname.nuno@...il.com>
To: Marius.Cristea@...rochip.com, jic23@...nel.org, lars@...afoo.de,
robh+dt@...nel.org
Cc: conor+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
devicetree@...r.kernel.org, linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] iio: adc: adding support for pac193x
On Thu, 2023-10-26 at 15:03 +0000, Marius.Cristea@...rochip.com wrote:
> Hi Nuno Sá,
>
> Thanks for looking over the patch.
>
> On Wed, 2023-10-25 at 16:38 +0200, Nuno Sá wrote:
> > EXTERNAL EMAIL: Do not click links or open attachments unless you
> > know the content is safe
> >
> > On Wed, 2023-10-25 at 16:44 +0300,
> > marius.cristea@...rochip.com wrote:
> > > From: Marius Cristea <marius.cristea@...rochip.com>
> > >
> > > This is the iio driver for Microchip
> > > PAC193X series of Power Monitor with Accumulator chip family.
> > >
> > > Signed-off-by: Marius Cristea <marius.cristea@...rochip.com>
> > > ---
> >
> > Hi Marius,
> >
> > I'll be honest and I just looked at this for 5min. But I'm seeing
> > things like
> > shunt resistors, vsense, power, energy... This seems to me that it
> > belong to
> > drivers/hwmon. Any special reason for IIO?
> >
>
> Yes, this device is at the boundary between IIO and HWMON if you are
> looking just at the "shunt resistors, vsense, power, energy". The
> device also has ADC internaly that can measure voltages (up to 4
> channels) and also currents (up to 4 channels). Current is measured as
> voltage across the shunt_resistor.
>
I think this alone is not justification but...
> As I said before: I was thinking to start with a simple driver (this
> one that is more apropiate to be a HWMON) and add more functionality
> later (like data buffering that is quite important for example if
> someone wants to profile power consumtion of the procesor itself, or a
> pheriperic, or a battery, this kind of functionality was requested by
> our customers).
>
having buffering support already makes a case for IIO, yes.
Hmm, I'm also just realizing this is v2 and indeed you already justified the very
same question in v1. Sorry for noise!
- Nuno Sá
>
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