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| author | German Gomez <german.gomez@arm.com> | 2022-08-23 18:06:50 +0200 |
|---|---|---|
| committer | Mathieu Poirier <mathieu.poirier@linaro.org> | 2022-08-26 21:38:35 +0200 |
| commit | 04d1edb0ecf297eba4fe946b3b715cff4f8a6656 (patch) | |
| tree | 59a83a5304be9f58f7f4cce41fb2c20ec081a8cd /Documentation/ABI | |
| parent | coresight: etm4x: Expose default timestamp source in sysfs (diff) | |
| download | linux-04d1edb0ecf297eba4fe946b3b715cff4f8a6656.tar.xz linux-04d1edb0ecf297eba4fe946b3b715cff4f8a6656.zip | |
coresight: etm4x: docs: Add documentation for 'ts_source' sysfs interface
Sync sysfs documentation pages to include the new ts_source (timestamp
source) interface.
Signed-off-by: German Gomez <german.gomez@arm.com>
Signed-off-by: James Clark <james.clark@arm.com>
Link: https://lore.kernel.org/r/20220823160650.455823-3-james.clark@arm.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x | 8 |
1 files changed, 8 insertions, 0 deletions
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@linaro.org> 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@linaro.org> or Suzuki K Poulose <suzuki.poulose@arm.com> +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. |