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Commit bc7ee556 authored by Mark Brown's avatar Mark Brown
Browse files

regmap: Add trace event for successful cache reads 



Currently we only trace physical reads, there's no instrumentation if
the read is satisfied from cache.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 018690d3

drivers/base/regmap/regcache.c

+10 −2
Original line number Diff line number Diff line
@@ -193,13 +193,21 @@ void regcache_exit(struct regmap *map) 
int regcache_read(struct regmap *map,

		  unsigned int reg, unsigned int *value)

{

	int ret;



	if (map->cache_type == REGCACHE_NONE)

		return -ENOSYS;



	BUG_ON(!map->cache_ops);



	if (!regmap_volatile(map, reg))

		return map->cache_ops->read(map, reg, value);

	if (!regmap_volatile(map, reg)) {

		ret = map->cache_ops->read(map, reg, value);



		if (ret == 0)

			trace_regmap_reg_read_cache(map->dev, reg, *value);



		return ret;

	}



	return -EINVAL;

}

include/trace/events/regmap.h

+9 −0
Original line number Diff line number Diff line
@@ -55,6 +55,15 @@ DEFINE_EVENT(regmap_reg, regmap_reg_read, 


);



DEFINE_EVENT(regmap_reg, regmap_reg_read_cache,



	TP_PROTO(struct device *dev, unsigned int reg,

		 unsigned int val),



	TP_ARGS(dev, reg, val)



);



DECLARE_EVENT_CLASS(regmap_block,



	TP_PROTO(struct device *dev, unsigned int reg, int count),