[PATCH] regulator: core: Add regulator bypass trace points

[PATCH] regulator: core: Add regulator bypass trace points

[Charles Keepax]

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>
---
 drivers/regulator/core.c         |  9 +++++++++
 include/trace/events/regulator.h | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 941783a14b454..ec04fe8ece475 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -4312,6 +4312,7 @@ 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)
@@ -4326,18 +4327,26 @@ 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);
 		}
 	}
 
diff --git a/include/trace/events/regulator.h b/include/trace/events/regulator.h
index b70583c32c08c..72b3ba93b0a5a 100644
--- a/include/trace/events/regulator.h
+++ b/include/trace/events/regulator.h
@@ -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.
-- 
2.11.0

Re: [PATCH] regulator: core: Add regulator bypass trace points

[Mark Brown]

On Fri, 29 May 2020 16:22:16 +0100, Charles Keepax wrote:
> 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.

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git for-next

Thanks!

[1/1] regulator: core: Add regulator bypass trace points
      commit: 48325655290869dbcdc356478bde4606d79d600e

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark