diff options
| author | Fabrice Gasnier <fabrice.gasnier@st.com> | 2017-01-26 15:28:31 +0100 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2017-01-28 19:24:57 +0100 |
| commit | 732f2dc46813821824db853e867f08b1ccabb1ab (patch) | |
| tree | ff6e70e59161d56b36a53de6fcbb6d2426956983 /Documentation/ABI/testing/sysfs-bus-iio-adc-stm32 | |
| parent | iio: adc: stm32: Enable use of stm32 timer triggers (diff) | |
| download | linux-732f2dc46813821824db853e867f08b1ccabb1ab.tar.xz linux-732f2dc46813821824db853e867f08b1ccabb1ab.zip | |
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/ABI/testing/sysfs-bus-iio-adc-stm32')
| -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 000000000000..efe4c85e3c8b --- /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. |