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authorMark Brown <broonie@opensource.wolfsonmicro.com>2011-11-30 14:27:08 +0000
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-11-30 20:51:09 +0000
commitbc7ee55633867909bb05e71f957a4d3c1aa1b488 (patch)
treeb8465a2ee229fed3a7ea133a983236ffe7f657d7 /drivers/base
parent018690d33ecf4aa1eb1415e38c40e2b0b6c7808e (diff)
downloadop-kernel-dev-bc7ee55633867909bb05e71f957a4d3c1aa1b488.zip
op-kernel-dev-bc7ee55633867909bb05e71f957a4d3c1aa1b488.tar.gz
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>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/regmap/regcache.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 1ca2d7a..1ead661 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -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;
}
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