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    Subject[PATCH v6 5/9] counter: 104-quad-8: Documentation: Add Generic Counter sysfs documentation
    Date
    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 <vilhelm.gray@gmail.com>
    ---
    .../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..274df6768b97
    --- /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: 4.18
    +Contact: linux-iio@vger.kernel.org
    +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: 4.18
    +Contact: linux-iio@vger.kernel.org
    +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: 4.18
    +Contact: linux-iio@vger.kernel.org
    +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 f11bf7885aeb..8e27b49e8d5e 100644
    --- a/MAINTAINERS
    +++ b/MAINTAINERS
    @@ -270,6 +270,7 @@ ACCES 104-QUAD-8 DRIVER
    M: William Breathitt Gray <vilhelm.gray@gmail.com>
    L: linux-iio@vger.kernel.org
    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

    --
    2.17.0
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