18c2ecf20Sopenharmony_ciWhat:		/sys/bus/iio/devices/triggerX/trigger_polarity
28c2ecf20Sopenharmony_ciKernelVersion:	4.11
38c2ecf20Sopenharmony_ciContact:	fabrice.gasnier@st.com
48c2ecf20Sopenharmony_ciDescription:
58c2ecf20Sopenharmony_ci		The STM32 ADC can be configured to use external trigger sources
68c2ecf20Sopenharmony_ci		(e.g. timers, pwm or exti gpio). Then, it can be tuned to start
78c2ecf20Sopenharmony_ci		conversions on external trigger by either:
88c2ecf20Sopenharmony_ci
98c2ecf20Sopenharmony_ci		- "rising-edge"
108c2ecf20Sopenharmony_ci		- "falling-edge"
118c2ecf20Sopenharmony_ci		- "both-edges".
128c2ecf20Sopenharmony_ci
138c2ecf20Sopenharmony_ci		Reading returns current trigger polarity.
148c2ecf20Sopenharmony_ci
158c2ecf20Sopenharmony_ci		Writing value before enabling conversions sets trigger polarity.
168c2ecf20Sopenharmony_ci
178c2ecf20Sopenharmony_ciWhat:		/sys/bus/iio/devices/triggerX/trigger_polarity_available
188c2ecf20Sopenharmony_ciKernelVersion:	4.11
198c2ecf20Sopenharmony_ciContact:	fabrice.gasnier@st.com
208c2ecf20Sopenharmony_ciDescription:
218c2ecf20Sopenharmony_ci		List all available trigger_polarity settings.
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