diff options
| author | Tingwei Zhang <[email protected]> | 2020-07-16 11:57:32 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2020-07-21 15:48:38 +0200 |
| commit | 02510a5aa78df45ff9a22def37e5c18677d4d659 (patch) | |
| tree | 21acdf5564448aedeedbde789f299ebce20fbdf2 /kernel/gcov/clang.c | |
| parent | 9cfb556357d56895ae50f0f3c691730d640530d2 (diff) | |
coresight: etm4x: Add support to skip trace unit power up
On some Qualcomm Technologies Inc. SoCs like SC7180, there
exists a hardware errata where the APSS (Application Processor
SubSystem)/CPU watchdog counter is stopped when the trace unit
power up ETM register is set (TRCPDCR.PU = 1). Since the ETMs
share the same power domain as that of respective CPU cores,
they are powered on when the CPU core is powered on. So we can
skip powering up of trace unit after checking for this errata
via new property called "qcom,skip-power-up".
Signed-off-by: Tingwei Zhang <[email protected]>
Co-developed-by: Sai Prakash Ranjan <[email protected]>
Signed-off-by: Sai Prakash Ranjan <[email protected]>
Signed-off-by: Mathieu Poirier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'kernel/gcov/clang.c')
0 files changed, 0 insertions, 0 deletions