linux-kernel - [PATCH v1 0/3] add sysfs nodes to configure TPDA's registers

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Message-Id: <20250826070150.5603-1-jie.gan@oss.qualcomm.com>
Date: Tue, 26 Aug 2025 15:01:47 +0800
From: Jie Gan <jie.gan@....qualcomm.com>
To: Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>,
        James Clark <james.clark@...aro.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Tingwei Zhang <tingwei.zhang@....qualcomm.com>
Cc: coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: [PATCH v1 0/3] add sysfs nodes to configure TPDA's registers

Patchset 1 introduces configuration of the cross-trigger registers with
appropriate values to enable proper generation of cross-trigger packets.

Patchset 2 introduces a function to configure the TPDA_SYNCR register,
which determines the frequency of ASYNC packet generation. These packets
assist userspace tools in accurately identifying each valid packet.

Patchset 3 introduces a sysfs node to initiate a flush request for the
specific port, forcing the data to synchronize and be transmitted to the
sink device.

Tao Zhang (3):
  coresight: tpda: Add sysfs node for tpda cross-trigger configuration
  coresight: tpda: add function to configure TPDA_SYNCR register
  coresight: tpda: add sysfs node to flush specific port

 .../testing/sysfs-bus-coresight-devices-tpda  |  50 +++
 drivers/hwtracing/coresight/coresight-tpda.c  | 301 ++++++++++++++++++
 drivers/hwtracing/coresight/coresight-tpda.h  |  29 ++
 3 files changed, 380 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda

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2.34.1