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

[Bagas Sanjaya]

On Fri, May 26, 2023 at 06:07:53PM +0800, Hao Zhang wrote:
> +=============================
> +Coresight Dummy Trace Module
> +=============================
> +
> +    :Author:   Hao Zhang <quic_hazha at quicinc.com>
> +    :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 at 0/soc at 0:sink/dummy_sink0
> +    dummy_source0 -> ../../../devices/platform/soc at 0/soc at 0:source/dummy_source0

The doc LGTM, thanks!

Reviewed-by: Bagas Sanjaya <bagasdotme at gmail.com>

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