Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 84b68263 authored by Mark Brown's avatar Mark Brown Committed by Liam Girdwood
Browse files

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: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 6faa7e0a

drivers/regulator/core.c

+5 −2
Original line number Diff line number Diff line
@@ -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 */

include/linux/regulator/consumer.h

+3 −1
Original line number Diff line number Diff line
@@ -89,8 +89,9 @@ 
 * REGULATION_OUT Regulator output is out of regulation.

 * FAIL           Regulator output has failed.

 * OVER_TEMP      Regulator over temp.

 * FORCE_DISABLE  Regulator shut down by software.

 * FORCE_DISABLE  Regulator forcibly shut down by software.

 * VOLTAGE_CHANGE Regulator voltage changed.

 * DISABLE        Regulator was disabled.

 *

 * NOTE: These events can be OR'ed together when passed into handler.

 */
@@ -102,6 +103,7 @@ 
#define REGULATOR_EVENT_OVER_TEMP		0x10

#define REGULATOR_EVENT_FORCE_DISABLE		0x20

#define REGULATOR_EVENT_VOLTAGE_CHANGE		0x40

#define REGULATOR_EVENT_DISABLE 		0x80



struct regulator;