Commit 04d1edb0 authored by German Gomez's avatar German Gomez Committed by Mathieu Poirier
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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: default avatarGerman Gomez <german.gomez@arm.com>
Signed-off-by: default avatarJames Clark <james.clark@arm.com>
Link: https://lore.kernel.org/r/20220823160650.455823-3-james.clark@arm.com


Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
parent 0f00b223

Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x

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@@ -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.

Documentation/trace/coresight/coresight-etm4x-reference.rst

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@@ -71,6 +71,20 @@ the ‘TRC’ prefix. 


----



: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: