diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/power_supply_core.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c index 4bc0c7f459a5..a44d4554af4f 100644 --- a/drivers/power/power_supply_core.c +++ b/drivers/power/power_supply_core.c @@ -446,6 +446,45 @@ struct power_supply *power_supply_get_by_phandle(struct device_node *np, return psy; } EXPORT_SYMBOL_GPL(power_supply_get_by_phandle); + +static void devm_power_supply_put(struct device *dev, void *res) +{ + struct power_supply **psy = res; + + power_supply_put(*psy); +} + +/** + * devm_power_supply_get_by_phandle() - Resource managed version of + * power_supply_get_by_phandle() + * @dev: Pointer to device holding phandle property + * @phandle_name: Name of property holding a power supply phandle + * + * Return: On success returns a reference to a power supply with + * matching name equals to value under @property, NULL or ERR_PTR otherwise. + */ +struct power_supply *devm_power_supply_get_by_phandle(struct device *dev, + const char *property) +{ + struct power_supply **ptr, *psy; + + if (!dev->of_node) + return ERR_PTR(-ENODEV); + + ptr = devres_alloc(devm_power_supply_put, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return ERR_PTR(-ENOMEM); + + psy = power_supply_get_by_phandle(dev->of_node, property); + if (IS_ERR_OR_NULL(psy)) { + devres_free(ptr); + } else { + *ptr = psy; + devres_add(dev, ptr); + } + return psy; +} +EXPORT_SYMBOL_GPL(devm_power_supply_get_by_phandle); #endif /* CONFIG_OF */ int power_supply_get_property(struct power_supply *psy, |
