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Leo Yan 8116e7a2ea coresight: etm4x: Support atclk 
[ Upstream commit 40c0cdc9cb ]

The atclk is an optional clock for the CoreSight ETMv4, but the driver
misses to initialize it.

This change enables atclk in probe of the ETMv4 driver, and dynamically
control the clock during suspend and resume.

No need to check the driver data and clock pointer in the runtime
suspend and resume, so remove checks.  And add error handling in the
resume function.

Add a minor fix to the comment format when adding the atclk field.

Fixes: 2e1cdfe184 ("coresight-etm4x: Adding CoreSight ETM4x driver")
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com>
Tested-by: James Clark <james.clark@linaro.org>
Signed-off-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250731-arm_cs_fix_clock_v4-v6-3-1dfe10bb3f6f@arm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-10-15 12:04:06 +02:00
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README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.