linux-kernel - [PATCHv2 0/2] coresight: etm4x: Add support to skip trace unit power up

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Message-Id: <cover.1589485594.git.saiprakash.ranjan@codeaurora.org>
Date:   Fri, 15 May 2020 01:27:54 +0530
From:   Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>, devicetree@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>
Cc:     Stephen Boyd <swboyd@...omium.org>, Leo Yan <leo.yan@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        Tingwei Zhang <tingwei@...eaurora.org>,
        coresight@...ts.linaro.org,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Subject: [PATCHv2 0/2] coresight: etm4x: Add support to skip trace unit power up

This series adds support to skip powering up of trace unit on systems
with an errata which stops CPU watchdog counter when power up bit is
set (TRCPDCR.PU = 1). Setting this bit is not required on Qualcomm
Technologies Inc. chipsets where this errata exists since the ETMs
are in the same power domain as their respective CPU cores.

Tingwei Zhang (2):
  coresight: etm4x: Add support to skip trace unit power up
  dt-bindings: arm: coresight: Add support to skip trace unit power up

 .../devicetree/bindings/arm/coresight.txt     |  7 +++++
 drivers/hwtracing/coresight/coresight-etm4x.c | 27 ++++++++++++-------
 drivers/hwtracing/coresight/coresight-etm4x.h |  3 +++
 3 files changed, 27 insertions(+), 10 deletions(-)

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