iio: adc: stm32: add trigger polarity extended attribute
authorFabrice Gasnier <fabrice.gasnier@st.com>
Thu, 26 Jan 2017 14:28:31 +0000 (15:28 +0100)
committerJonathan Cameron <jic23@kernel.org>
Sat, 28 Jan 2017 18:24:57 +0000 (18:24 +0000)
commit732f2dc46813821824db853e867f08b1ccabb1ab
treeff6e70e59161d56b36a53de6fcbb6d2426956983
parentf24a33b3e2a393856c315b23bbb5bebf422b0611
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>
Documentation/ABI/testing/sysfs-bus-iio-adc-stm32 [new file with mode: 0644]
drivers/iio/adc/stm32-adc.c