coresight-etm: add CoreSight ETM/PTM driver
This driver manages CoreSight ETM (Embedded Trace Macrocell) that supports processor tracing. Currently supported version are ARM ETMv3.x and PTM1.x. Signed-off-by: NPratik Patel <pratikp@codeaurora.org> Signed-off-by: NMathieu Poirier <mathieu.poirier@linaro.org> coresight-etm3x: adding missing error checking Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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drivers/coresight/coresight-etm.h
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