regulator: Add notifier event on regulator disable

The intended use case is for drivers which disable regulators to save
power but need to do some work to restore the hardware state when
restarting.  If the supplies are not actually disabled due to board
limits or sharing with other active devices this notifier allows the
driver to avoid unneeded reinitialisation, particularly when used with
runtime PM.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index b60a4c9f8f16..6d2ce8a05331 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1341,6 +1341,9 @@ static int _regulator_disable(struct regulator_dev *rdev)
                                        __func__, rdev_get_name(rdev));
                                 return ret;
                         }
+
+                        _notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE,
+                                             NULL);
                 }
 
                 /* decrease our supplies ref count and disable if required */
@@ -1399,8 +1402,8 @@ static int _regulator_force_disable(struct regulator_dev *rdev)
                         return ret;
                 }
                 /* notify other consumers that power has been forced off */
-                _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE,
-                        NULL);
+                _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE |
+                        REGULATOR_EVENT_DISABLE, NULL);
         }
 
         /* decrease our supplies ref count and disable if required */