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

From: Jie Gan

Date: Mon Oct 13 2025 - 04:25:20 EST




On 9/15/2025 10:12 AM, Jie Gan wrote:


On 8/27/2025 7:59 PM, James Clark wrote:


On 27/08/2025 11:55 am, Jie Gan wrote:
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@xxxxxxxxxxxxxxxx/

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@xxxxxxxxxxxxxxxx/

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


Reviewed-by: James Clark <james.clark@xxxxxxxxxx>


Gentle ping.

Hi Suzuki,

James has reviewed the patch series. May I know whether you have any comments about the patch series before get applied?

Thanks,
Jie