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-rw-r--r--Documentation/ABI/testing/sysfs-bus-iio-adc-stm323
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-adc-stm32 b/Documentation/ABI/testing/sysfs-bus-iio-adc-stm32
index efe4c85e3c8b..1975c7a1af34 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio-adc-stm32
+++ b/Documentation/ABI/testing/sysfs-bus-iio-adc-stm32
@@ -5,10 +5,13 @@ Description:
The STM32 ADC can be configured to use external trigger sources
(e.g. timers, pwm or exti gpio). Then, it can be tuned to start
conversions on external trigger by either:
+
- "rising-edge"
- "falling-edge"
- "both-edges".
+
Reading returns current trigger polarity.
+
Writing value before enabling conversions sets trigger polarity.
What: /sys/bus/iio/devices/triggerX/trigger_polarity_available