linux-kernel - [PATCH] regmap: Add tracepoints for cache only and cache bypass

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Date:	Thu, 23 Feb 2012 22:03:19 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	linux-kernel@...r.kernel.org
Cc:	patches@...nsource.wolfsonmicro.com,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH] regmap: Add tracepoints for cache only and cache bypass

Useful for figuring out where the hardware interaction went or came from.

Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
---
 drivers/base/regmap/regcache.c |    2 ++
 include/trace/events/regmap.h  |   36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 0 deletions(-)

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 6cd0398..1124abc 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -360,6 +360,7 @@ void regcache_cache_only(struct regmap *map, bool enable)
 	mutex_lock(&map->lock);
 	WARN_ON(map->cache_bypass && enable);
 	map->cache_only = enable;
+	trace_regmap_cache_only(map->dev, enable);
 	mutex_unlock(&map->lock);
 }
 EXPORT_SYMBOL_GPL(regcache_cache_only);
@@ -397,6 +398,7 @@ void regcache_cache_bypass(struct regmap *map, bool enable)
 	mutex_lock(&map->lock);
 	WARN_ON(map->cache_only && enable);
 	map->cache_bypass = enable;
+	trace_regmap_cache_bypass(map->dev, enable);
 	mutex_unlock(&map->lock);
 }
 EXPORT_SYMBOL_GPL(regcache_cache_bypass);
diff --git a/include/trace/events/regmap.h b/include/trace/events/regmap.h
index 12fbf43..d697382 100644
--- a/include/trace/events/regmap.h
+++ b/include/trace/events/regmap.h
@@ -139,6 +139,42 @@ TRACE_EVENT(regcache_sync,
 		  __get_str(type), __get_str(status))
 );
 
+DECLARE_EVENT_CLASS(regmap_bool,
+
+	TP_PROTO(struct device *dev, bool flag),
+
+	TP_ARGS(dev, flag),
+
+	TP_STRUCT__entry(
+		__string(	name,		dev_name(dev)	)
+		__field(	int,		flag		)
+	),
+
+	TP_fast_assign(
+		__assign_str(name, dev_name(dev));
+		__entry->flag = flag;
+	),
+
+	TP_printk("%s flag=%d", __get_str(name),
+		  (int)__entry->flag)
+);
+
+DEFINE_EVENT(regmap_bool, regmap_cache_only,
+
+	TP_PROTO(struct device *dev, bool flag),
+
+	TP_ARGS(dev, flag)
+
+);
+
+DEFINE_EVENT(regmap_bool, regmap_cache_bypass,
+
+	TP_PROTO(struct device *dev, bool flag),
+
+	TP_ARGS(dev, flag)
+
+);
+
 #endif /* _TRACE_REGMAP_H */
 
 /* This part must be outside protection */
-- 
1.7.9.1

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