A first encoder IIO driver (104-quad-8) with a count channel already exist. STM32 driver have the same type of feature but with different counting modes. Some parts, like counting direction (up/down) could be generalized so move the corresponding documentation from driver file to sysfs-bus-iio.
version 4: - fix indentation in documentation - reword triggered description
version 3: - fix typo in documentation - change some functions names
version 2: - since iio: Generalize counting direction modes commit of version has being pushed in iio.git testing branch I have remove it from this serie. - split the original attribute in 2: one for quadrature modes and one for enable modes. - add scale info - change modes to more generic names to be able to merge them with 104-quad-8 in the futur.
Benjamin Gaignard (2): iio: stm32 trigger: Add quadrature encoder device iio: stm32 trigger: Add counter enable modes
.../ABI/testing/sysfs-bus-iio-timer-stm32 | 71 ++++- drivers/iio/trigger/stm32-timer-trigger.c | 314 ++++++++++++++++++++- include/linux/mfd/stm32-timers.h | 2 + 3 files changed, 377 insertions(+), 10 deletions(-)