From 04d1edb0ecf297eba4fe946b3b715cff4f8a6656 Mon Sep 17 00:00:00 2001 From: German Gomez Date: Tue, 23 Aug 2022 17:06:50 +0100 Subject: 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 Signed-off-by: James Clark Link: https://lore.kernel.org/r/20220823160650.455823-3-james.clark@arm.com Signed-off-by: Mathieu Poirier --- .../trace/coresight/coresight-etm4x-reference.rst | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'Documentation/trace') 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 @@ 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: -- cgit v1.2.3