Coresight: Add coresight dummy driver

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Some Coresight devices that kernel don't have permission to access or
configure. For these devices, a dummy driver is needed to register them as
Coresight devices. The module may also be used to define components that
may not have any programming interfaces, so that paths can be created
in the driver. It provides Coresight API for operations on dummy devices,
such as enabling and disabling them. It also provides the Coresight dummy
sink/source paths for debugging.

Signed-off-by: Hao Zhang <quic_hazha@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230602084149.40031-2-quic_hazha@quicinc.com

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Hao Zhang 2023-06-02 16:41:47 +08:00 • committed by Suzuki K Poulose

parent 83e92e301e

commit 9d3ba0b6c0

4 changed files with 176 additions and 0 deletions

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11

drivers/hwtracing/coresight/Kconfig

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1

drivers/hwtracing/coresight/Makefile

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163

drivers/hwtracing/coresight/coresight-dummy.c

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1

include/linux/coresight.h

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