[PATCH v4 05/11] counter: Documentation: Add Simple Counter sysfs documentation

[William Breathitt Gray]

This patch adds standard documentation for the userspace sysfs
attributes of the Simple Counter interface.

Signed-off-by: William Breathitt Gray <vilhelm.gray@xxxxxxxxx>
---
 .../ABI/testing/sysfs-bus-counter-simple-sysfs     | 61 ++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-counter-simple-sysfs

diff --git a/Documentation/ABI/testing/sysfs-bus-counter-simple-sysfs b/Documentation/ABI/testing/sysfs-bus-counter-simple-sysfs
new file mode 100644
index 000000000000..e1f32c64c667
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-counter-simple-sysfs
@@ -0,0 +1,61 @@
+What:		/sys/bus/counter/devices/counterX/countY
+KernelVersion:	4.16
+Contact:	linux-iio@xxxxxxxxxxxxxxx
+Description:
+		Count data of Count Y. This is a signed integer value that
+		represents the accumulated count.
+
+What:		/sys/bus/counter/devices/counterX/countY_function
+KernelVersion:	4.16
+Contact:	linux-iio@xxxxxxxxxxxxxxx
+Description:
+		Count function mode of Count Y. Count function evaluation is
+		triggered by conditions specified by the countY_signalZ_action
+		attributes. Two count function modes are available: increase and
+		decrease.
+
+		Increase:
+			Accumulated count is incremented.
+
+		Decrease:
+			Accumulated count is decremented.
+
+What:		/sys/bus/counter/devices/counterX/countY_max
+KernelVersion:	4.16
+Contact:	linux-iio@xxxxxxxxxxxxxxx
+Description:
+		Count Y count data maximum value.
+
+What:		/sys/bus/counter/devices/counterX/countY_min
+KernelVersion:	4.16
+Contact:	linux-iio@xxxxxxxxxxxxxxx
+Description:
+		Count Y count data minimum value.
+
+What:		/sys/bus/counter/devices/counterX/countY_signalZ_action
+KernelVersion:	4.16
+Contact:	linux-iio@xxxxxxxxxxxxxxx
+Description:
+		Action mode of Count Y for Signal Z. This attribute indicates
+		the condition of Signal Z that triggers the count function
+		evaluation for Count Y. Four action modes are available: none,
+		rising edge, falling edge, and both edges.
+
+		None:
+			Signal does not trigger the count function.
+
+		Rising Edge:
+			Low state transitions to High state.
+
+		Falling Edge:
+			High state transitions to Low state.
+
+		Both Edges:
+			Any state transition.
+
+What:		/sys/bus/counter/devices/counterX/signalY
+KernelVersion:	4.16
+Contact:	linux-iio@xxxxxxxxxxxxxxx
+Description:
+		Signal data of Signal Y. This is the respective input level
+		represented by two available states: low and high.
-- 
2.15.1