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| author | Marcelo Schmitt <marcelo.schmitt@analog.com> | 2026-07-27 18:32:18 -0300 |
|---|---|---|
| committer | Jonathan Cameron <jonathan.cameron@oss.qualcomm.com> | 2026-08-03 22:32:33 +0100 |
| commit | ce717fbfda6c697c5f0b4e081cdac4718c7016f5 (patch) | |
| tree | 928d0b836bc587862ee5ffdc884c60e7530505d6 | |
| parent | d9166f1a996c91f480736dc588701d1028cec9a8 (diff) | |
| download | linux-ce717fbfda6c697c5f0b4e081cdac4718c7016f5.tar.gz linux-ce717fbfda6c697c5f0b4e081cdac4718c7016f5.zip | |
iio: ABI: Encourage differential voltage ABI usage
So far, parts that could only do differential voltage measurements were
only required to have a consistent labeling of their channels by complying
either to voltageY or to voltageY-voltageZ ABI. Over time, code maintainers
came to the conclusion that the voltageY-voltageZ ABI is better suited for
differential-only chips as it provides a simple indication to users that
the channels measure the difference of two inputs.
Adjust the ABI documentation to recommend using the voltageY-voltageZ ABI
for chips that do only differential voltage measurements.
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index 5cc2e82c4997..7446e07b9ab2 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -162,10 +162,11 @@ Contact: linux-iio@vger.kernel.org Description: Raw (unscaled) differential voltage measurement equivalent to channel Y - channel Z where these channel numbers apply to the - physically equivalent inputs when non differential readings are - separately available. In differential only parts, then all that - is required is a consistent labeling. Units after application - of scale and offset are millivolts. + physically equivalent inputs when non-differential readings are + separately available. Even though differential-only parts had + been merely required to have consistent channel labeling, this + ABI is preferred over the non-differential one for those chips. + Units after application of scale and offset are millivolts. What: /sys/bus/iio/devices/iio:deviceX/in_altvoltageY_rms_raw KernelVersion: 6.18 |