Registering the cooling device from the probe can result in the
execution of get_property() function before it gets initialized.
To avoid this, register the cooling device from a workqueue
instead of registering in the probe.
Signed-off-by: Manaf Meethalavalappu Pallikunhi <[email protected]>
---
drivers/power/supply/power_supply_core.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index 10a357a..ea3e75e 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -132,6 +132,7 @@ void power_supply_changed(struct power_supply *psy)
}
EXPORT_SYMBOL_GPL(power_supply_changed);
+static int psy_register_cooler(struct power_supply *psy);
/*
* Notify that power supply was registered after parent finished the probing.
*
@@ -139,6 +140,8 @@ EXPORT_SYMBOL_GPL(power_supply_changed);
* calling power_supply_changed() directly from power_supply_register()
* would lead to execution of get_property() function provided by the driver
* too early - before the probe ends.
+ * Also, registering cooling device from the probe will execute the
+ * get_property() function. So register the cooling device after the probe.
*
* Avoid that by waiting on parent's mutex.
*/
@@ -156,6 +159,7 @@ static void power_supply_deferred_register_work(struct work_struct *work)
}
power_supply_changed(psy);
+ psy_register_cooler(psy);
if (psy->dev.parent)
mutex_unlock(&psy->dev.parent->mutex);
@@ -1257,10 +1261,6 @@ __power_supply_register(struct device *parent,
if (rc)
goto register_thermal_failed;
- rc = psy_register_cooler(psy);
- if (rc)
- goto register_cooler_failed;
-
rc = power_supply_create_triggers(psy);
if (rc)
goto create_triggers_failed;
@@ -1290,8 +1290,6 @@ __power_supply_register(struct device *parent,
add_hwmon_sysfs_failed:
power_supply_remove_triggers(psy);
create_triggers_failed:
- psy_unregister_cooler(psy);
-register_cooler_failed:
psy_unregister_thermal(psy);
register_thermal_failed:
device_del(dev);
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
With thermal frameworks of-thermal interface, thermal zone parameters can
be defined in devicetree. This includes cooling device mitigation levels
for a thermal zone. To take advantage of this, cooling device should use
the thermal_of_cooling_device_register API to register a cooling device.
Use thermal_of_cooling_device_register API to register the power supply
cooling device. This enables power supply cooling device be included in the
thermal zone parameter in devicetree.
Signed-off-by: Manaf Meethalavalappu Pallikunhi <[email protected]>
---
drivers/power/supply/power_supply_core.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index ea3e75e..800b8a3 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -132,7 +132,7 @@ void power_supply_changed(struct power_supply *psy)
}
EXPORT_SYMBOL_GPL(power_supply_changed);
-static int psy_register_cooler(struct power_supply *psy);
+static int psy_register_cooler(struct device *dev, struct power_supply *psy);
/*
* Notify that power supply was registered after parent finished the probing.
*
@@ -159,7 +159,7 @@ static void power_supply_deferred_register_work(struct work_struct *work)
}
power_supply_changed(psy);
- psy_register_cooler(psy);
+ psy_register_cooler(psy->dev.parent, psy);
if (psy->dev.parent)
mutex_unlock(&psy->dev.parent->mutex);
@@ -1145,7 +1145,7 @@ static const struct thermal_cooling_device_ops psy_tcd_ops = {
.set_cur_state = ps_set_cur_charge_cntl_limit,
};
-static int psy_register_cooler(struct power_supply *psy)
+static int psy_register_cooler(struct device *dev, struct power_supply *psy)
{
int i;
@@ -1153,7 +1153,13 @@ static int psy_register_cooler(struct power_supply *psy)
for (i = 0; i < psy->desc->num_properties; i++) {
if (psy->desc->properties[i] ==
POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT) {
- psy->tcd = thermal_cooling_device_register(
+ if (dev)
+ psy->tcd = thermal_of_cooling_device_register(
+ dev_of_node(dev),
+ (char *)psy->desc->name,
+ psy, &psy_tcd_ops);
+ else
+ psy->tcd = thermal_cooling_device_register(
(char *)psy->desc->name,
psy, &psy_tcd_ops);
return PTR_ERR_OR_ZERO(psy->tcd);
@@ -1178,7 +1184,7 @@ static void psy_unregister_thermal(struct power_supply *psy)
{
}
-static int psy_register_cooler(struct power_supply *psy)
+static int psy_register_cooler(struct device *dev, struct power_supply *psy)
{
return 0;
}
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project