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

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Message-ID: <5aa4d76f-6f16-40ae-9dbf-767c63aa0a3d@baylibre.com>
Date: Tue, 29 Apr 2025 10:40:14 -0500
From: David Lechner <dlechner@...libre.com>
To: Jorge Marques <gastmaier@...il.com>, Andy Shevchenko <andy@...nel.org>
Cc: 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 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.