linux-kernel - Re: [PATCH v2 1/5] Documentation: ABI: add oversampling frequency in sysfs-bus-iio

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Message-ID: <CAHp75VcZM+4Br2-RMKZixEd1=x3_exbWZkEFw1U_NrFtsejkUg@mail.gmail.com>
Date: Wed, 30 Apr 2025 01:03:07 +0300
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: David Lechner <dlechner@...libre.com>
Cc: Jorge Marques <gastmaier@...il.com>, Andy Shevchenko <andy@...nel.org>, 
	Jorge Marques <jorge.marques@...log.com>, Jonathan Cameron <jic23@...nel.org>, 
	Lars-Peter Clausen <lars@...afoo.de>, Michael Hennerich <Michael.Hennerich@...log.com>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Jonathan Corbet <corbet@....net>, Nuno Sá <nuno.sa@...log.com>, 
	Uwe Kleine-König <ukleinek@...nel.org>, 
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org, 
	linux-pwm@...r.kernel.org
Subject: Re: [PATCH v2 1/5] Documentation: ABI: add oversampling frequency in sysfs-bus-iio

On Tue, Apr 29, 2025 at 6:40 PM David Lechner <dlechner@...libre.com> wrote:
>
> On 4/29/25 8:47 AM, Jorge Marques wrote:
> >
> > Hi Andy,
> >
> > I agree with your suggestion, and in this case the appropriate kernel
> > version is 3.10.
> >
> >>
> >>> +What:              /sys/bus/iio/devices/iio:deviceX/oversampling_frequency
> >>> +KernelVersion:     6.15
> >>
> >> Then why don't you put the real version of the first release that has it?
> >>
> >>> +Contact:   linux-iio@...r.kernel.org
> >>> +Description:
> >>> +           Some devices have internal clocks for oversampling.
> >>> +           Sets the resulting frequency in Hz to trigger a conversion used by
> >>> +           the oversampling filter.
> >>> +           If the device has a fixed internal clock or is computed based on
> >>> +           the sampling frequency parameter, the parameter is read only.
> >>> +
> >>> +What:              /sys/bus/iio/devices/iio:deviceX/oversampling_frequency_available
> >>> +KernelVersion:     6.15
> >>
> >> Ditto.
> >>
> >>> +Contact:   linux-iio@...r.kernel.org
> >>> +Description:
> >>> +           Hardware dependent values supported by the oversampling
> >>> +           frequency.
>
>
> I don't see oversampling_frequency used in any existing driver, so how could
> it be introduced in kernel 3.10? I think you confuse it with
> events/sampling_frequency.
>
> oversampling_frequency is new and so 6.16 should be correct if Jonathan picks
> this up in the next few weeks, otherwise it will be 6.17.

If this is the case, the whole commit message should be revisited.

-- 
With Best Regards,
Andy Shevchenko