[PATCH] regulator: core: Add new notification for enabling of regulator

[Harald Geyer]

This is useful for devices, which need some time to start up, to help
the drivers track how long the supply has been up already. Ie whether
it can safely talk to the HW or needs to wait.

Signed-off-by: Harald Geyer <harald@xxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
 drivers/regulator/core.c           | 2 ++
 include/linux/regulator/consumer.h | 1 +
 2 files changed, 3 insertions(+)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 04baac9a165b..6b9bb1b00226 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2162,6 +2162,8 @@ static int _regulator_enable(struct regulator_dev *rdev)
 			if (ret < 0)
 				return ret;
 
+			_notifier_call_chain(rdev, REGULATOR_EVENT_ENABLE,
+					     NULL);
 		} else if (ret < 0) {
 			rdev_err(rdev, "is_enabled() failed: %d\n", ret);
 			return ret;
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index ea0fffa5faeb..df176d7c2b87 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -119,6 +119,7 @@ struct regmap;
 #define REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE	0x200
 #define REGULATOR_EVENT_PRE_DISABLE		0x400
 #define REGULATOR_EVENT_ABORT_DISABLE		0x800
+#define REGULATOR_EVENT_ENABLE			0x1000
 
 /*
  * Regulator errors that can be queried using regulator_get_error_flags
-- 
2.11.0