diff options
| author | Rodrigo Alencar <rodrigo.alencar@analog.com> | 2026-07-29 09:25:30 +0100 |
|---|---|---|
| committer | Jonathan Cameron <jonathan.cameron@oss.qualcomm.com> | 2026-09-21 03:41:19 +0100 |
| commit | 1171811e2a0d4c4ecb6b0261a4575e2283aeedce (patch) | |
| tree | f2aeb6906172f7c640fc4589cb8910d9eeafdf75 | |
| parent | f2718230040615a4b98dfc0ebee49df3884f3508 (diff) | |
iio: ABI: add parent entry for iio channels
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@analog.com>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index d4974a32d7a7..2b6f57041763 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -2174,6 +2174,34 @@ Description: specific attributes. This is useful for userspace to be able to better identify an individual channel. +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_parent +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_parent +What: /sys/bus/iio/devices/iio:deviceX/in_altvoltageY_parent +What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_parent +What: /sys/bus/iio/devices/iio:deviceX/in_currentY_parent +What: /sys/bus/iio/devices/iio:deviceX/out_currentY_parent +What: /sys/bus/iio/devices/iio:deviceX/in_altcurrentY_parent +What: /sys/bus/iio/devices/iio:deviceX/out_altcurrentY_parent +KernelVersion: 7.3 +Contact: linux-iio@vger.kernel.org +Description: + Read-only attribute containing the sysfs name prefix of the parent + channel for hierarchical channel relationships (e.g. "out_altvoltage0"). + The prefix uniquely identifies the parent channel and can be used by + userspace to organize channels in tree-like structures that reflects + virtual or logical relationships between them. + + 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 <dir>_<type>[Y]_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. + What: /sys/bus/iio/devices/iio:deviceX/in_frequencyY_raw KernelVersion: 7.3 Contact: linux-iio@vger.kernel.org |