Re: [PATCH v7 03/17] iio: ABI: add parent entry for iio channels

[Jonathan Cameron]

On Tue, 07 Jul 2026 15:04:24 +0100
Rodrigo Alencar via B4 Relay <devnull+rodrigo.alencar.analog.com@xxxxxxxxxx> wrote:

> From: Rodrigo Alencar <rodrigo.alencar@xxxxxxxxxx>
> 
> Add documentation for a read-only sysfs attribute that allows to expose
> parent-child relationships between IIO channels.
> 
> Signed-off-by: Rodrigo Alencar <rodrigo.alencar@xxxxxxxxxx>

> +
> +		For example, an IIO device may expose a primary output channel as
> +		"out_voltage0" together with a set of profile-based or mode-based
> +		subchannels used to configure or compose the output signal. These
> +		subchannels may carry common attributes such as frequency, phase, etc.
> +		They do not represent physical outputs, but rather logical/virtual
> +		channels grouping configurations that affect the primary output.
> +		Each subchannel exposes a *_parent attribute reading "out_voltage0",
> +		allowing userspace to group controls under the output channel they
> +		belong to rather than treating them as unrelated top-level channels.
> +
Nice.  Thanks for adding that.

Jonathan

>  What:		/sys/bus/iio/devices/iio:deviceX/in_phaseY_raw
>  KernelVersion:	4.18
>  Contact:	linux-iio@xxxxxxxxxxxxxxx
>