diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-11-30 14:27:08 +0000 |
|---|---|---|
| committer | Lokesh Pathak <lpathak@nvidia.com> | 2012-03-05 07:55:14 -0800 |
| commit | 65a11acf350177394a96e21919c6fef2551a2cc3 (patch) | |
| tree | e17a26506b18cc432ebc8290191b52b714cd0561 | |
| parent | 818abf71538cf2e880a5be127f3f852b3d291a15 (diff) | |
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: Mark Brown <broonie@opensource.wolfsonmicro.com>
(cherry picked from commit bc7ee55633867909bb05e71f957a4d3c1aa1b488)
Change-Id: Ibbd7caff4e97b8a511f1d36b98bfdaa706ff8af4
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/87572
| -rw-r--r-- | drivers/base/regmap/regcache.c | 12 | ||||
| -rw-r--r-- | include/trace/events/regmap.h | 9 |
2 files changed, 19 insertions, 2 deletions
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index 741c85d1cb35..5636e5be57e7 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -192,13 +192,21 @@ 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; } diff --git a/include/trace/events/regmap.h b/include/trace/events/regmap.h index 1e3193b8fcc8..12fbf43524e9 100644 --- a/include/trace/events/regmap.h +++ b/include/trace/events/regmap.h @@ -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), |