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regulator: core: Add regulator bypass trace points 

Add new trace points for the start and end of enabling bypass on a
regulator, to allow monitoring of when regulators are moved into bypass
and how long that takes.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200529152216.9671-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Charles Keepax 2020-05-29 16:22:16 +01:00 committed by Mark Brown
parent c1f615e4f4
commit 4832565529
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 41 additions and 0 deletions
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9
drivers/regulator/core.c
View File

@ -4321,6 +4321,7 @@ EXPORT_SYMBOL_GPL(regulator_set_load);
int regulator_allow_bypass(struct regulator *regulator, bool enable)
{
struct regulator_dev *rdev = regulator->rdev;
const char *name = rdev_get_name(rdev);
int ret = 0;
if (!rdev->desc->ops->set_bypass)
@ -4335,18 +4336,26 @@ int regulator_allow_bypass(struct regulator *regulator, bool enable)
rdev->bypass_count++;
if (rdev->bypass_count == rdev->open_count) {
trace_regulator_bypass_enable(name);
ret = rdev->desc->ops->set_bypass(rdev, enable);
if (ret != 0)
rdev->bypass_count--;
else
trace_regulator_bypass_enable_complete(name);
}
} else if (!enable && regulator->bypass) {
rdev->bypass_count--;
if (rdev->bypass_count != rdev->open_count) {
trace_regulator_bypass_disable(name);
ret = rdev->desc->ops->set_bypass(rdev, enable);
if (ret != 0)
rdev->bypass_count++;
else
trace_regulator_bypass_disable_complete(name);
}
}

32
include/trace/events/regulator.h
View File

@ -70,6 +70,38 @@ DEFINE_EVENT(regulator_basic, regulator_disable_complete,
);
DEFINE_EVENT(regulator_basic, regulator_bypass_enable,
TP_PROTO(const char *name),
TP_ARGS(name)
);
DEFINE_EVENT(regulator_basic, regulator_bypass_enable_complete,
TP_PROTO(const char *name),
TP_ARGS(name)
);
DEFINE_EVENT(regulator_basic, regulator_bypass_disable,
TP_PROTO(const char *name),
TP_ARGS(name)
);
DEFINE_EVENT(regulator_basic, regulator_bypass_disable_complete,
TP_PROTO(const char *name),
TP_ARGS(name)
);
/*
* Events that take a range of numerical values, mostly for voltages
* and so on.