regmap: Add tracepoints for cache only and cache bypass
Mark Brown [Thu, 23 Feb 2012 22:02:57 +0000 (22:02 +0000)]
Useful for figuring out where the hardware interaction went or came from.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
(cherry picked from commit 5d5b7d4f80ed6e861c1c220fd57e3dad0912526e)

Change-Id: Ie7c0659458a3a4a2f100d86db552c606d9da0e6b
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/96488
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>

drivers/base/regmap/regcache.c
include/trace/events/regmap.h

index c38ee81..3785955 100644 (file)
@@ -317,6 +317,7 @@ 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);
@@ -354,6 +355,7 @@ 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);
index 12fbf43..d697382 100644 (file)
@@ -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 */