[PATCH v3 0/3] add sysfs nodes to configure TPDA's registers

Jie Gan
2025-08-27T11:43:32Z

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

Patchset 2 introduces a logic 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.

Changes in V3:
1. Optimizing codes according to James's comment.
Link to V2 - https://lore.kernel.org/all/20250827042042.6786-1-jie.gan@oss.qualcomm.com/

Changes in V2:
1. Refactoring the code based on James's comment for optimization.
Link to V1 - https://lore.kernel.org/all/20250826070150.5603-1-jie.gan@oss.qualcomm.com/

Tao Zhang (3):
coresight: tpda: add sysfs nodes for tpda cross-trigger configuration
coresight: tpda: add logic 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 | 278 ++++++++++++++++++
drivers/hwtracing/coresight/coresight-tpda.h | 33 ++-
3 files changed, 360 insertions(+), 1 deletion(-)
create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda

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2.34.1