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| author | Fabrice Gasnier <fabrice.gasnier@st.com> | 2017-01-26 15:28:31 +0100 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2017-01-28 18:24:57 +0000 |
| commit | 732f2dc46813821824db853e867f08b1ccabb1ab (patch) | |
| tree | ff6e70e59161d56b36a53de6fcbb6d2426956983 /Documentation | |
| parent | f24a33b3e2a393856c315b23bbb5bebf422b0611 (diff) | |
| download | op-kernel-dev-732f2dc46813821824db853e867f08b1ccabb1ab.zip op-kernel-dev-732f2dc46813821824db853e867f08b1ccabb1ab.tar.gz | |
iio: adc: stm32: add trigger polarity extended attribute
Define extended attribute so that user may choose rising, falling or both
edges for external trigger sources.
Default to rising edge in case it isn't set.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio-adc-stm32 | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-adc-stm32 b/Documentation/ABI/testing/sysfs-bus-iio-adc-stm32 new file mode 100644 index 0000000..efe4c85 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-adc-stm32 @@ -0,0 +1,18 @@ +What: /sys/bus/iio/devices/triggerX/trigger_polarity +KernelVersion: 4.11 +Contact: fabrice.gasnier@st.com +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 +KernelVersion: 4.11 +Contact: fabrice.gasnier@st.com +Description: + List all available trigger_polarity settings. |
