Commit 7f1a1c2c authored by Tingwei Zhang's avatar Tingwei Zhang Committed by Greg Kroah-Hartman

dt-bindings: arm: coresight: Add support to skip trace unit power up

Add "qcom,skip-power-up" property to identify systems which can
skip powering up of trace unit since they share the same power
domain as their CPU core. This is required to identify such
systems with hardware errata which stops the CPU watchdog counter
when the power up bit is set (TRCPDCR.PU).
Signed-off-by: default avatarTingwei Zhang <tingwei@codeaurora.org>
Co-developed-by: default avatarSai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Signed-off-by: default avatarSai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200716175746.3338735-5-mathieu.poirier@linaro.orgSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 02510a5a
......@@ -108,6 +108,13 @@ its hardware characteristcs.
* arm,cp14: must be present if the system accesses ETM/PTM management
registers via co-processor 14.
* qcom,skip-power-up: boolean. Indicates that an implementation can
skip powering up the trace unit. TRCPDCR.PU does not have to be set
on Qualcomm Technologies Inc. systems since ETMs are in the same power
domain as their CPU cores. This property is required to identify such
systems with hardware errata where the CPU watchdog counter is stopped
when TRCPDCR.PU is set.
* Optional property for TMC:
* arm,buffer-size: size of contiguous buffer space for TMC ETR
......
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