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Commit 7e798ef9 authored by William Breathitt Gray's avatar William Breathitt Gray Committed by Greg Kroah-Hartman
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counter: 104-quad-8: Documentation: Add Generic Counter sysfs documentation 



This patch adds standard documentation for the Generic Counter interface
userspace sysfs attributes of the 104-QUAD-8 driver.

Acked-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarWilliam Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent f1d8a071

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

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What:		/sys/bus/counter/devices/counterX/signalY/index_polarity

KernelVersion:	5.2

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:	5.2

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:	5.2

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.

MAINTAINERS

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@@ -272,6 +272,7 @@ 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