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CoreSight TMC-ETR must have the non-secure invasive debug access enabled for use by self-hosted tracing. Without it, there is no point in enabling the ETR. So, let us check it in the TMC_AUTHSTATUS register and fail the probe if it is disabled. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Link: https://lore.kernel.org/r/20190829202842.580-7-mathieu.poirier@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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