From af36103e48c0146d9af9403f0d994f30ca17a4d8 Mon Sep 17 00:00:00 2001 From: Mathieu Poirier Date: Wed, 2 Aug 2017 10:21:59 -0600 Subject: [PATCH] coresight: etm3x: Set synchronisation frequencty to TRM default Register ETMSYNCFR holds the number of by that need to be generated before periodic synchronisation packets are inserted in the trace stream. By zeroing out the config structure, the current code effectively disable periodic synchronization. This patch simply initialise the recommended value for this register as specified in the technical reference manual. Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman --- drivers/hwtracing/coresight/coresight-etm3x.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c index 93ee8fc539be..9d8bd4e36b32 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x.c +++ b/drivers/hwtracing/coresight/coresight-etm3x.c @@ -243,6 +243,8 @@ void etm_set_default(struct etm_config *config) } config->ctxid_mask = 0x0; + /* Setting default to 1024 as per TRM recommendation */ + config->sync_freq = 0x400; } void etm_config_trace_mode(struct etm_config *config) -- 2.20.1