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

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Message-ID: <ZHRUELoOoqw6rkbQ@debian.me>
Date:   Mon, 29 May 2023 14:28:16 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Hao Zhang <quic_hazha@...cinc.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        James Clark <james.clark@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Konrad Dybcio <konradybcio@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Jonathan Corbet <corbet@....net>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Tingwei Zhang <quic_tingweiz@...cinc.com>,
        Jinlong Mao <quic_jinlmao@...cinc.com>,
        Yuanfang Zhang <quic_yuanfang@...cinc.com>,
        Tao Zhang <quic_taozha@...cinc.com>,
        Trilok Soni <quic_tsoni@...cinc.com>,
        linux-arm-msm@...r.kernel.org,
        Bjorn Andersson <andersson@...nel.org>,
        linux-doc@...r.kernel.org
Subject: 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 <quic_hazha@...cinc.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@...oc@0:sink/dummy_sink0
> +    dummy_source0 -> ../../../devices/platform/soc@...oc@0:source/dummy_source0

The doc LGTM, thanks!

Reviewed-by: Bagas Sanjaya <bagasdotme@...il.com>

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

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