linux-kernel - [PATCH 8/8] docs: counter: add edge_capture_unit

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Date:   Sat, 16 Oct 2021 20:33:43 -0500
From:   David Lechner <david@...hnology.com>
To:     linux-iio@...r.kernel.org
Cc:     David Lechner <david@...hnology.com>,
        William Breathitt Gray <vilhelm.gray@...il.com>,
        Robert Nelson <robertcnelson@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 8/8] docs: counter: add edge_capture_unit_* attributes

This adds documentation for new counter subsystem edge_capture_unit_*
sysfs attributes.

Signed-off-by: David Lechner <david@...hnology.com>
---
 Documentation/ABI/testing/sysfs-bus-counter | 37 +++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-counter b/Documentation/ABI/testing/sysfs-bus-counter
index 78bb1a501007..6c192c8c2b55 100644
--- a/Documentation/ABI/testing/sysfs-bus-counter
+++ b/Documentation/ABI/testing/sysfs-bus-counter
@@ -59,6 +59,7 @@ What:		/sys/bus/counter/devices/counterX/countY/error_noise_available
 What:		/sys/bus/counter/devices/counterX/countY/function_available
 What:		/sys/bus/counter/devices/counterX/countY/prescaler_available
 What:		/sys/bus/counter/devices/counterX/countY/signalZ_action_available
+What:		/sys/bus/counter/devices/counterX/edge_capture_unit_prescaler_available
 What:		/sys/bus/counter/devices/counterX/latch_mode_available
 What:		/sys/bus/counter/devices/counterX/signalY/index_polarity_available
 What:		/sys/bus/counter/devices/counterX/signalY/synchronous_mode_available
@@ -230,6 +231,10 @@ What:		/sys/bus/counter/devices/counterX/signalY/cable_fault_enable_component_id
 What:		/sys/bus/counter/devices/counterX/signalY/filter_clock_prescaler_component_id
 What:		/sys/bus/counter/devices/counterX/signalY/index_polarity_component_id
 What:		/sys/bus/counter/devices/counterX/signalY/synchronous_mode_component_id
+What:		/sys/bus/counter/devices/edge_capture_unit_enable_component_id
+What:		/sys/bus/counter/devices/edge_capture_unit_latched_period_component_id
+What:		/sys/bus/counter/devices/edge_capture_unit_max_period_component_id
+What:		/sys/bus/counter/devices/edge_capture_unit_prescaler_component_id
 What:		/sys/bus/counter/devices/latch_mode_component_id
 What:		/sys/bus/counter/devices/unit_timer_enable_component_id
 What:		/sys/bus/counter/devices/unit_timer_period_component_id
@@ -249,6 +254,38 @@ Description:
 		shorter or equal to configured value are ignored. Value 0 means
 		filter is disabled.
 
+What:		/sys/bus/counter/devices/edge_capture_unit_enable
+KernelVersion:	5.16
+Contact:	linux-iio@...r.kernel.org
+Description:
+		Read/write attribute that starts or stops the Edge Capture Unit.
+		Valid values are boolean.
+
+What:		/sys/bus/counter/devices/edge_capture_unit_latched_period
+KernelVersion:	5.16
+Contact:	linux-iio@...r.kernel.org
+Description:
+		Latched period of the Edge Capture Unit represented as a string.
+		The value is latched in based on the trigger selected by the
+		counterX/latch_mode attribute. Units are nanoseconds.
+
+What:		/sys/bus/counter/devices/edge_capture_unit_max_period
+KernelVersion:	5.16
+Contact:	linux-iio@...r.kernel.org
+Description:
+		Read/write attribute that selects the maximum period that can
+		be measured by the Edge Capture Unit. Units are nanoseconds.
+
+What:		/sys/bus/counter/devices/edge_capture_unit_prescaler
+KernelVersion:	5.16
+Contact:	linux-iio@...r.kernel.org
+Description:
+		Read/write attribute that selects the how the
+		counterX/countY/count value is scaled coming in to the Edge
+		Capture Unit. This acts like a clock divider, e.g. if a value
+		of 4 is selected, the Edge Capture Unit will measure the period
+		between every 4 counts.
+
 What:		/sys/bus/counter/devices/counterX/events_queue_size
 KernelVersion:	5.16
 Contact:	linux-iio@...r.kernel.org
-- 
2.25.1