thermal: trace: Trace temperature changes

Create a new event to trace the temperature of a thermal zone. Using
this event trace the temperature changes of the thermal zone every-time
it is updated.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/include/trace/events/thermal.h b/include/trace/events/thermal.h
new file mode 100644
index 000000000000..8c5ca96eccd6
--- /dev/null
+++ b/include/trace/events/thermal.h
@@ -0,0 +1,38 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM thermal
+
+#if !defined(_TRACE_THERMAL_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_THERMAL_H
+
+#include <linux/thermal.h>
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(thermal_temperature,
+
+        TP_PROTO(struct thermal_zone_device *tz),
+
+        TP_ARGS(tz),
+
+        TP_STRUCT__entry(
+                __string(thermal_zone, tz->type)
+                __field(int, id)
+                __field(int, temp_prev)
+                __field(int, temp)
+        ),
+
+        TP_fast_assign(
+                __assign_str(thermal_zone, tz->type);
+                __entry->id = tz->id;
+                __entry->temp_prev = tz->last_temperature;
+                __entry->temp = tz->temperature;
+        ),
+
+        TP_printk("thermal_zone=%s id=%d temp_prev=%d temp=%d",
+                __get_str(thermal_zone), __entry->id, __entry->temp_prev,
+                __entry->temp)
+);
+
+#endif /* _TRACE_THERMAL_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>