Documentation/ABI/testing/sysfs-bus-counter-104-quad-8

   1 What:           /sys/bus/counter/devices/counterX/signalY/index_polarity
   2 KernelVersion:  5.2
   3 Contact:        linux-iio@vger.kernel.org
   4 Description:
   5                 Active level of index input Signal Y; irrelevant in
   6                 non-synchronous load mode.
   7
   8 What:           /sys/bus/counter/devices/counterX/signalY/index_polarity_available
   9 What:           /sys/bus/counter/devices/counterX/signalY/synchronous_mode_available
  10 KernelVersion:  5.2
  11 Contact:        linux-iio@vger.kernel.org
  12 Description:
  13                 Discrete set of available values for the respective Signal Y
  14                 configuration are listed in this file.
  15
  16 What:           /sys/bus/counter/devices/counterX/signalY/synchronous_mode
  17 KernelVersion:  5.2
  18 Contact:        linux-iio@vger.kernel.org
  19 Description:
  20                 Configure the counter associated with Signal Y for
  21                 non-synchronous or synchronous load mode. Synchronous load mode
  22                 cannot be selected in non-quadrature (Pulse-Direction) clock
  23                 mode.
  24
  25                 non-synchronous:
  26                         A logic low level is the active level at this index
  27                         input. The index function (as enabled via preset_enable)
  28                         is performed directly on the active level of the index
  29                         input.
  30
  31                 synchronous:
  32                         Intended for interfacing with encoder Index output in
  33                         quadrature clock mode. The active level is configured
  34                         via index_polarity. The index function (as enabled via
  35                         preset_enable) is performed synchronously with the
  36                         quadrature clock on the active level of the index input.