From ef7fcf86cc65822ca091adda6e865a1bfbbd99de Mon Sep 17 00:00:00 2001 From: Rodrigo Alencar Date: Wed, 29 Jul 2026 09:25:35 +0100 Subject: iio: core: add hierarchical channel relationships Add parent-child relationship between iio channels by creating a parent pointer field in iio_chan_spec struct and exposing a sysfs attribute that returns the parent channel prefix. Signed-off-by: Rodrigo Alencar Signed-off-by: Jonathan Cameron --- include/linux/iio/iio.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux/iio') diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index c227e292aaf1..7c751e117ccc 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -264,6 +264,10 @@ struct iio_scan_type { * @ext_info: Array of extended info attributes for this channel. * The array is NULL terminated, the last element should * have its name field set to NULL. + * @parent: Optional pointer to the parent channel spec for + * hierarchical channel relationships. When set, a read-only + * "parent" sysfs attribute is created containing the + * parent channel's sysfs name prefix (e.g. "in_voltage0"). * @extend_name: Allows labeling of channel attributes with an * informative name. Note this has no effect codes etc, * unlike modifiers. @@ -309,6 +313,7 @@ struct iio_chan_spec { const struct iio_event_spec *event_spec; unsigned int num_event_specs; const struct iio_chan_spec_ext_info *ext_info; + const struct iio_chan_spec *parent; const char *extend_name; const char *datasheet_name; unsigned int modified:1; -- cgit v1.2.3