On Fri, May 26, 2023 at 06:07:53PM +0800, Hao Zhang wrote: > +============================= > +Coresight Dummy Trace Module > +============================= > + > + :Author: Hao Zhang <quic_hazha@xxxxxxxxxxx> > + :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 <bagasdotme@xxxxxxxxx> -- An old man doll... just what I always wanted! - Clara
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