coresight: etm4x: Extract the trace unit controlling

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The trace unit is controlled in the ETM hardware enabling and disabling.
The sequential changes for support AUX pause and resume will reuse the
same operations.

Extract the operations in the etm4_{enable|disable}_trace_unit()
functions.  A minor improvement in etm4_enable_trace_unit() is for
returning the timeout error to callers.

Signed-off-by: Leo Yan <leo.yan@arm.com>
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250401180708.385396-2-leo.yan@arm.com

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Leo Yan 2025-04-01 19:07:02 +01:00 • committed by Suzuki K Poulose

parent aad548a953

commit 40f682ae50

1 changed files with 62 additions and 41 deletions

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drivers/hwtracing/coresight/coresight-etm4x-core.c

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