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SubjectRe: [PATCH v7 05/10] counter: 104-quad-8: Documentation: Add Generic Counter sysfs documentation
On Thu, 21 Jun 2018 17:08:08 -0400
William Breathitt Gray <vilhelm.gray@gmail.com> 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 <vilhelm.gray@gmail.com>
This stuff is very device specific obviously, but looks fine to me.

Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.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..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: 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: 4.19
> +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: 4.19
> +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 4083523699f3..a06fd762f5d9 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
>


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