From bc7ee55633867909bb05e71f957a4d3c1aa1b488 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Wed, 30 Nov 2011 14:27:08 +0000 Subject: 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 --- drivers/base/regmap/regcache.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'drivers/base') 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; } -- cgit v1.1