Hi Andy,
I agree with your suggestion, and in this case the appropriate kernel
version is 3.10.
On Tue, Apr 22, 2025 at 06:50:19PM +0300, Andy Shevchenko wrote:
> On Tue, Apr 22, 2025 at 01:34:46PM +0200, Jorge Marques wrote:
> > Some devices have an internal clock used to space out the conversion
> > trigger for the oversampling filter,
> > Consider an ADC with conversion and data ready pins topology:
> >
> > Sampling trigger | | | | |
> > ADC conversion ++++ ++++ ++++ ++++ ++++
> > ADC data ready * * * * *
> >
> > With the oversampling frequency, conversions are spaced:
> >
> > Sampling trigger | | | | |
> > ADC conversion + + + + + + + + + + + + + + + + + + + +
> > ADC data ready * * * * *
> >
> > In some devices and ranges, this internal clock can be used to evenly
> > space the conversions between the sampling edge.
> > In other devices the oversampling frequency is fixed or is computed
> > based on the sampling frequency parameter, and the parameter is
> > read only.
> >
> > Devices with this feature are max1363, ad7606, ad799x, and ad4052.
> > The max1363 driver included the events/sampling_frequency in
> > commit 168c9d95a940 ("iio:adc:max1363 move from staging.")
> > and ad799x in
> > commit ba1d79613df3 ("staging:iio:ad799x: Use event spec for threshold
> > hysteresis")
> > but went undocumented so far.
>
> So, it was no documentation for the nodes this change describes, right?
>
> ...
>
> > +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@xxxxxxxxxxxxxxx
> > +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@xxxxxxxxxxxxxxx
> > +Description:
> > + Hardware dependent values supported by the oversampling
> > + frequency.
>
> --
> With Best Regards,
> Andy Shevchenko
>
Best regards,
Jorge
