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>
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018690d33e
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bc7ee55633
2 changed files with 19 additions and 2 deletions
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@ -193,13 +193,21 @@ void regcache_exit(struct regmap *map)
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int regcache_read(struct regmap *map,
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unsigned int reg, unsigned int *value)
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{
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int ret;
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if (map->cache_type == REGCACHE_NONE)
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return -ENOSYS;
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BUG_ON(!map->cache_ops);
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if (!regmap_volatile(map, reg))
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return map->cache_ops->read(map, reg, value);
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if (!regmap_volatile(map, reg)) {
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ret = map->cache_ops->read(map, reg, value);
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if (ret == 0)
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trace_regmap_reg_read_cache(map->dev, reg, *value);
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return ret;
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}
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return -EINVAL;
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}
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@ -55,6 +55,15 @@ DEFINE_EVENT(regmap_reg, regmap_reg_read,
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);
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DEFINE_EVENT(regmap_reg, regmap_reg_read_cache,
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TP_PROTO(struct device *dev, unsigned int reg,
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unsigned int val),
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TP_ARGS(dev, reg, val)
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);
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DECLARE_EVENT_CLASS(regmap_block,
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TP_PROTO(struct device *dev, unsigned int reg, int count),
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