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Regulator: Push lock out of _notifier_call_chain + add voltage change event. 

Regulator: Push lock out of _notifier_call_chain and into caller functions
(side effect of fixing deadlock in regulator_force_disable)
+ Add a voltage changed event.
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Jonathan Cameron 2009-01-19 18:20:58 +00:00 committed by Liam Girdwood
parent 9485397aa2
commit b136fb4463
3 changed files with 14 additions and 5 deletions
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15
drivers/regulator/core.c
View File

@ -1284,6 +1284,7 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV)
ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV);
out:
_notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE, NULL);
mutex_unlock(&rdev->mutex);
return ret;
}
@ -1584,20 +1585,23 @@ int regulator_unregister_notifier(struct regulator *regulator,
}
EXPORT_SYMBOL_GPL(regulator_unregister_notifier);
/* notify regulator consumers and downstream regulator consumers */
/* notify regulator consumers and downstream regulator consumers.
* Note mutex must be held by caller.
*/
static void _notifier_call_chain(struct regulator_dev *rdev,
unsigned long event, void *data)
{
struct regulator_dev *_rdev;
/* call rdev chain first */
mutex_lock(&rdev->mutex);
blocking_notifier_call_chain(&rdev->notifier, event, NULL);
mutex_unlock(&rdev->mutex);
/* now notify regulator we supply */
list_for_each_entry(_rdev, &rdev->supply_list, slist)
_notifier_call_chain(_rdev, event, data);
list_for_each_entry(_rdev, &rdev->supply_list, slist) {
mutex_lock(&_rdev->mutex);
_notifier_call_chain(_rdev, event, data);
mutex_unlock(&_rdev->mutex);
}
}
/**
@ -1744,6 +1748,7 @@ EXPORT_SYMBOL_GPL(regulator_bulk_free);
*
* Called by regulator drivers to notify clients a regulator event has
* occurred. We also notify regulator clients downstream.
* Note lock must be held by caller.
*/
int regulator_notifier_call_chain(struct regulator_dev *rdev,
unsigned long event, void *data)

2
drivers/regulator/wm8350-regulator.c
View File

@ -1293,6 +1293,7 @@ static void pmic_uv_handler(struct wm8350 *wm8350, int irq, void *data)
{
struct regulator_dev *rdev = (struct regulator_dev *)data;
mutex_lock(&rdev->mutex);
if (irq == WM8350_IRQ_CS1 || irq == WM8350_IRQ_CS2)
regulator_notifier_call_chain(rdev,
REGULATOR_EVENT_REGULATION_OUT,
@ -1301,6 +1302,7 @@ static void pmic_uv_handler(struct wm8350 *wm8350, int irq, void *data)
regulator_notifier_call_chain(rdev,
REGULATOR_EVENT_UNDER_VOLTAGE,
wm8350);
mutex_unlock(&rdev->mutex);
}
static int wm8350_regulator_probe(struct platform_device *pdev)

2
include/linux/regulator/consumer.h
View File

@ -88,6 +88,7 @@
* FAIL Regulator output has failed.
* OVER_TEMP Regulator over temp.
* FORCE_DISABLE Regulator shut down by software.
* VOLTAGE_CHANGE Regulator voltage changed.
*
* NOTE: These events can be OR'ed together when passed into handler.
*/
@ -98,6 +99,7 @@
#define REGULATOR_EVENT_FAIL 0x08
#define REGULATOR_EVENT_OVER_TEMP 0x10
#define REGULATOR_EVENT_FORCE_DISABLE 0x20
#define REGULATOR_EVENT_VOLTAGE_CHANGE 0x40
struct regulator;