target/armv7m_trace: Improve SWO frequency auto-detection

[openocd.git] / src / target / armv7m_trace.c

diff --git a/src/target/armv7m_trace.c b/src/target/armv7m_trace.c
index 6170119d9effc698daca348233bac183e70a48b8..853362f7eab610ca5cf724e36498ff8307b35424 100644 (file)
--- a/src/target/armv7m_trace.c
+++ b/src/target/armv7m_trace.c
@@ -56,16 +56,15 @@ int armv7m_trace_tpiu_config(struct target *target)
 {
        struct armv7m_common *armv7m = target_to_armv7m(target);
        struct armv7m_trace_config *trace_config = &armv7m->trace_config;
-       int prescaler;
+       uint16_t prescaler;
        int retval;
 
        target_unregister_timer_callback(armv7m_poll_trace, target);
 
-
        retval = adapter_config_trace(trace_config->config_type == TRACE_CONFIG_TYPE_INTERNAL,
-                                     trace_config->pin_protocol,
-                                     trace_config->port_size,
-                                     &trace_config->trace_freq);
+               trace_config->pin_protocol, trace_config->port_size,
+               &trace_config->trace_freq, trace_config->traceclkin_freq, &prescaler);
+
        if (retval != ERROR_OK)
                return retval;
 
@@ -74,23 +73,6 @@ int armv7m_trace_tpiu_config(struct target *target)
                return ERROR_FAIL;
        }
 
-       prescaler = trace_config->traceclkin_freq / trace_config->trace_freq;
-
-       if (trace_config->traceclkin_freq % trace_config->trace_freq) {
-               prescaler++;
-               int trace_freq = trace_config->traceclkin_freq / prescaler;
-               LOG_INFO("Can not obtain %u trace port frequency from %u TRACECLKIN frequency, using %u instead",
-                         trace_config->trace_freq, trace_config->traceclkin_freq,
-                         trace_freq);
-               trace_config->trace_freq = trace_freq;
-               retval = adapter_config_trace(trace_config->config_type == TRACE_CONFIG_TYPE_INTERNAL,
-                                             trace_config->pin_protocol,
-                                             trace_config->port_size,
-                                             &trace_config->trace_freq);
-               if (retval != ERROR_OK)
-                       return retval;
-       }
-
        retval = target_write_u32(target, TPIU_CSPSR, 1 << trace_config->port_size);
        if (retval != ERROR_OK)
                return retval;