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732f2dc468
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>
19 lines
640 B
Plaintext
19 lines
640 B
Plaintext
What: /sys/bus/iio/devices/triggerX/trigger_polarity
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KernelVersion: 4.11
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Contact: fabrice.gasnier@st.com
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Description:
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The STM32 ADC can be configured to use external trigger sources
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(e.g. timers, pwm or exti gpio). Then, it can be tuned to start
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conversions on external trigger by either:
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- "rising-edge"
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- "falling-edge"
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- "both-edges".
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Reading returns current trigger polarity.
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Writing value before enabling conversions sets trigger polarity.
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What: /sys/bus/iio/devices/triggerX/trigger_polarity_available
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KernelVersion: 4.11
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Contact: fabrice.gasnier@st.com
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Description:
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List all available trigger_polarity settings.
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