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authorJonathan Cameron <jic23@cam.ac.uk>2009-01-19 18:20:58 +0000
committerLiam Girdwood <lrg@slimlogic.co.uk>2009-03-31 09:56:20 +0100
commitb136fb4463d13eea129bf090a8a465bba6bf0003 (patch)
tree48de26101e37833a79f6b3d62f4526dcca8f91fe /drivers/regulator
parent9485397aa2195e82da6373586a66689526675ad4 (diff)
downloadop-kernel-dev-b136fb4463d13eea129bf090a8a465bba6bf0003.zip
op-kernel-dev-b136fb4463d13eea129bf090a8a465bba6bf0003.tar.gz
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>
Diffstat (limited to 'drivers/regulator')
-rw-r--r--drivers/regulator/core.c15
-rw-r--r--drivers/regulator/wm8350-regulator.c2
2 files changed, 12 insertions, 5 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 0ff95c3..96c877d 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -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)
diff --git a/drivers/regulator/wm8350-regulator.c b/drivers/regulator/wm8350-regulator.c
index 5056e23..afad611 100644
--- a/drivers/regulator/wm8350-regulator.c
+++ b/drivers/regulator/wm8350-regulator.c
@@ -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)
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