On Thu, 21 Jun 2018 17:08:08 -0400 William Breathitt Gray <[email protected]> wrote:
> This patch adds standard documentation for the Generic Counter interface > userspace sysfs attributes of the 104-QUAD-8 driver. > > Signed-off-by: William Breathitt Gray <[email protected]> This stuff is very device specific obviously, but looks fine to me. Acked-by: Jonathan Cameron <[email protected]> > --- > .../ABI/testing/sysfs-bus-counter-104-quad-8 | 36 +++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 37 insertions(+) > create mode 100644 Documentation/ABI/testing/sysfs-bus-counter-104-quad-8 > > diff --git a/Documentation/ABI/testing/sysfs-bus-counter-104-quad-8 > b/Documentation/ABI/testing/sysfs-bus-counter-104-quad-8 > new file mode 100644 > index 000000000000..062637df3c78 > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-bus-counter-104-quad-8 > @@ -0,0 +1,36 @@ > +What: /sys/bus/counter/devices/counterX/signalY/index_polarity > +KernelVersion: 4.19 > +Contact: [email protected] > +Description: > + Active level of index input Signal Y; irrelevant in > + non-synchronous load mode. > + > +What: > /sys/bus/counter/devices/counterX/signalY/index_polarity_available > +What: > /sys/bus/counter/devices/counterX/signalY/synchronous_mode_available > +KernelVersion: 4.19 > +Contact: [email protected] > +Description: > + Discrete set of available values for the respective Signal Y > + configuration are listed in this file. > + > +What: > /sys/bus/counter/devices/counterX/signalY/synchronous_mode > +KernelVersion: 4.19 > +Contact: [email protected] > +Description: > + Configure the counter associated with Signal Y for > + non-synchronous or synchronous load mode. Synchronous load mode > + cannot be selected in non-quadrature (Pulse-Direction) clock > + mode. > + > + Non-synchronous: > + A logic low level is the active level at this index > + input. The index function (as enabled via preset_enable) > + is performed directly on the active level of the index > + input. > + > + Synchronous: > + Intended for interfacing with encoder Index output in > + quadrature clock mode. The active level is configured > + via index_polarity. The index function (as enabled via > + preset_enable) is performed synchronously with the > + quadrature clock on the active level of the index input. > diff --git a/MAINTAINERS b/MAINTAINERS > index 4083523699f3..a06fd762f5d9 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -270,6 +270,7 @@ ACCES 104-QUAD-8 DRIVER > M: William Breathitt Gray <[email protected]> > L: [email protected] > S: Maintained > +F: Documentation/ABI/testing/sysfs-bus-counter-104-quad-8 > F: Documentation/ABI/testing/sysfs-bus-iio-counter-104-quad-8 > F: drivers/counter/104-quad-8.c >
