coresight: etm4x: Add support to enable ETMv4.2
[ Upstream commit
5666dfd1d8a45a167f0d8b4ef47ea7f780b1f24a ]
SDM845 has ETMv4.2 and can use the existing etm4x driver.
But the current etm driver checks only for ETMv4.0 and
errors out for other etm4x versions. This patch adds this
missing support to enable SoC's with ETMv4x to use same
driver by checking only the ETM architecture major version
number.
Without this change, we get below error during etm probe:
/ # dmesg | grep etm
[ 6.660093] coresight-etm4x: probe of
7040000.etm failed with error -22
[ 6.666902] coresight-etm4x: probe of
7140000.etm failed with error -22
[ 6.673708] coresight-etm4x: probe of
7240000.etm failed with error -22
[ 6.680511] coresight-etm4x: probe of
7340000.etm failed with error -22
[ 6.687313] coresight-etm4x: probe of
7440000.etm failed with error -22
[ 6.694113] coresight-etm4x: probe of
7540000.etm failed with error -22
[ 6.700914] coresight-etm4x: probe of
7640000.etm failed with error -22
[ 6.707717] coresight-etm4x: probe of
7740000.etm failed with error -22
With this change, etm probe is successful:
/ # dmesg | grep etm
[ 6.659198] coresight-etm4x
7040000.etm: CPU0: ETM v4.2 initialized
[ 6.665848] coresight-etm4x
7140000.etm: CPU1: ETM v4.2 initialized
[ 6.672493] coresight-etm4x
7240000.etm: CPU2: ETM v4.2 initialized
[ 6.679129] coresight-etm4x
7340000.etm: CPU3: ETM v4.2 initialized
[ 6.685770] coresight-etm4x
7440000.etm: CPU4: ETM v4.2 initialized
[ 6.692403] coresight-etm4x
7540000.etm: CPU5: ETM v4.2 initialized
[ 6.699024] coresight-etm4x
7640000.etm: CPU6: ETM v4.2 initialized
[ 6.705646] coresight-etm4x
7740000.etm: CPU7: ETM v4.2 initialized
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
projects / thirdparty / kernel / stable.git / commit
