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| author | Tao Zhang <quic_taozha@quicinc.com> | 2024-02-04 13:30:37 +0800 |
|---|---|---|
| committer | Suzuki K Poulose <suzuki.poulose@arm.com> | 2024-02-12 10:29:47 +0000 |
| commit | 2d9ab11c262e39f3bc829d0679257ab942d5878f (patch) | |
| tree | bb7bb3bc949bcc6762cc4ae70f99c87adbec779b /Documentation/ABI | |
| parent | e6d7f5252f73cf21d3676de794916204524f51b5 (diff) | |
| download | linux-stable-2d9ab11c262e39f3bc829d0679257ab942d5878f.tar.gz linux-stable-2d9ab11c262e39f3bc829d0679257ab942d5878f.tar.bz2 linux-stable-2d9ab11c262e39f3bc829d0679257ab942d5878f.zip | |
coresight-tpdm: Add support to configure CMB
TPDM CMB subunits support two forms of CMB data set element creation:
continuous and trace-on-change collection mode. Continuous change
creates CMB data set elements on every CMBCLK edge. Trace-on-change
creates CMB data set elements only when a new data set element differs
in value from the previous element in a CMB data set. Set CMB_CR.MODE
to 0 for continuous CMB collection mode. Set CMB_CR.MODE to 1 for
trace-on-change CMB collection mode.
Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Jinlong Mao <quic_jinlmao@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1707024641-22460-7-git-send-email-quic_taozha@quicinc.com
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm index 4dd49b159543..6dfb18d6d64a 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm @@ -170,3 +170,17 @@ Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_t Description: (RW) Set/Get the MSR(mux select register) for the DSB subunit TPDM. + +What: /sys/bus/coresight/devices/<tpdm-name>/cmb_mode +Date: January 2024 +KernelVersion 6.9 +Contact: Jinlong Mao (QUIC) <quic_jinlmao@quicinc.com>, Tao Zhang (QUIC) <quic_taozha@quicinc.com> +Description: (Write) Set the data collection mode of CMB tpdm. Continuous + change creates CMB data set elements on every CMBCLK edge. + Trace-on-change creates CMB data set elements only when a new + data set element differs in value from the previous element + in a CMB data set. + + Accepts only one of the 2 values - 0 or 1. + 0 : Continuous CMB collection mode. + 1 : Trace-on-change CMB collection mode. |