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Date: Mon, 14 Sep 2026 00:38:17 +0100
From: Jonathan Cameron <jic23@kernel.org>
To: Andy Shevchenko <andriy.shevchenko@intel.com>
Cc: Andrei Stancovici <andrei.stancovici@analog.com>, Nuno =?UTF-8?B?U8Oh?=
 <nuno.sa@analog.com>, Michael Hennerich <Michael.Hennerich@analog.com>,
 David Lechner <dlechner@baylibre.com>, Andy Shevchenko <andy@kernel.org>,
 Rob Herring <robh@kernel.org>, Krzysztof Kozlowski <krzk+dt@kernel.org>,
 Conor Dooley <conor+dt@kernel.org>, Liam Beguin <liambeguin@gmail.com>,
 linux@analog.com, linux-iio@vger.kernel.org, devicetree@vger.kernel.org,
 linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 3/3] iio: adc: ltc2497: add 2x conversion speed mode
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On Wed, 9 Sep 2026 17:04:57 +0300
Andy Shevchenko <andriy.shevchenko@intel.com> wrote:

> On Wed, Sep 09, 2026 at 11:27:52AM +0300, Andrei Stancovici wrote:
> > The LTC2499 can convert at twice the output rate by disabling the offset
> > auto-calibration.  Expose it through sampling_frequency and
> > sampling_frequency_available on the voltage channels.  The part ignores
> > the setting while measuring temperature, so the temperature channel does
> > not carry the attribute.
> > 
> > The wait before a result is read is keyed on the conversion currently in
> > flight, whose duration is fixed by the mode that was active when it
> > started rather than by the mode just selected.  Otherwise the first read
> > after a 1x -> 2x switch can reprogram the part while a 1x conversion is
> > still running, which the part NACKs.  
> 
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
> 
> ...
> 
> > +LTC2497_DEFINE_CHANNELS(ltc2497core_channel_samp_freq,
> > +			BIT(IIO_CHAN_INFO_SAMP_FREQ));  
> 
> I believe having this on a single line is fine.
> 
Tweaked.

I've taken the somewhat (currently) unusual step of picking up 2 and 3, but
not patch 1.  In the past I've always been one to pick up whatever is ready
but since that started confusing sashiko I stopped doing so.
Here it doesn't matter as patch 1 is independent anyway!

So patches 2 and 3 are on the testing branch of iio.git.

Thanks,

Jonathan