From: German Gomez <german.gomez@xxxxxxx> Sync sysfs documentation pages to include the new ts_source (timestamp source) interface. Signed-off-by: German Gomez <german.gomez@xxxxxxx> Signed-off-by: James Clark <james.clark@xxxxxxx> --- .../ABI/testing/sysfs-bus-coresight-devices-etm4x | 8 ++++++++ .../trace/coresight/coresight-etm4x-reference.rst | 14 ++++++++++++++ 2 files changed, 22 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x index 8e53a32f8150..08b1964f27d3 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x @@ -516,3 +516,11 @@ Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> Description: (Read) Returns the number of special conditional P1 right-hand keys that the trace unit can use (0x194). The value is taken directly from the HW. + +What: /sys/bus/coresight/devices/etm<N>/ts_source +Date: October 2022 +KernelVersion: 6.1 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> or Suzuki K Poulose <suzuki.poulose@xxxxxxx> +Description: (Read) When FEAT_TRF is implemented, value of TRFCR_ELx.TS used for + trace session. Otherwise -1 indicates an unknown time source. Check + trcidr0.tssize to see if a global timestamp is available. diff --git a/Documentation/trace/coresight/coresight-etm4x-reference.rst b/Documentation/trace/coresight/coresight-etm4x-reference.rst index fb7578fd9372..70e34b8c81c1 100644 --- a/Documentation/trace/coresight/coresight-etm4x-reference.rst +++ b/Documentation/trace/coresight/coresight-etm4x-reference.rst @@ -71,6 +71,20 @@ ---- +:File: ``ts_source`` (ro) +:Trace Registers: None. +:Notes: + When FEAT_TRF is implemented, value of TRFCR_ELx.TS used for trace session. Otherwise -1 + indicates an unknown time source. Check trcidr0.tssize to see if a global timestamp is + available. + +:Example: + ``$> cat ts_source`` + + ``$> 1`` + +---- + :File: ``addr_idx`` (rw) :Trace Registers: None. :Notes: -- 2.28.0
