Re: [PATCH v5 3/3] Documentation: trace: Add documentation for Coresight Dummy Trace

On Fri, May 26, 2023 at 06:07:53PM +0800, Hao Zhang wrote:

+=============================
+Coresight Dummy Trace Module
+=============================
+
+    :Author:   Hao Zhang [off-list ref]
+    :Date:     May 2023
+
+Introduction
+------------
+
+The Coresight dummy trace module is for the specific devices that kernel don't
+have permission to access or configure, e.g., CoreSight TPDMs on Qualcomm
+platforms. For these devices, a dummy driver is needed to register them as
+Coresight devices. The module may also be used to define components that may
+not have any programming interfaces (e.g, static links), so that paths can be
+created in the driver. It provides Coresight API for operations on dummy
+devices, such as enabling and disabling them. It also provides the Coresight
+dummy sink/source paths for debugging.
+
+Config details
+--------------
+
+There are two types of nodes, dummy sink and dummy source. These nodes
+are available at ``/sys/bus/coresight/devices``.
+
+Example output::
+
+    $ ls -l /sys/bus/coresight/devices | grep dummy
+    dummy_sink0 -> ../../../devices/platform/soc@0/soc@0:sink/dummy_sink0
+    dummy_source0 -> ../../../devices/platform/soc@0/soc@0:source/dummy_source0

The doc LGTM, thanks!

Reviewed-by: Bagas Sanjaya <redacted>

-- 
An old man doll... just what I always wanted! - Clara