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power: Add devm_power_supply_get_by_phandle() helper function
This commit adds a resource-managed version of the power_supply_get_by_phandle() function. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
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2 changed files with 44 additions and 0 deletions
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@ -446,6 +446,45 @@ struct power_supply *power_supply_get_by_phandle(struct device_node *np,
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return psy;
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}
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EXPORT_SYMBOL_GPL(power_supply_get_by_phandle);
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static void devm_power_supply_put(struct device *dev, void *res)
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{
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struct power_supply **psy = res;
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power_supply_put(*psy);
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}
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/**
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* devm_power_supply_get_by_phandle() - Resource managed version of
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* power_supply_get_by_phandle()
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* @dev: Pointer to device holding phandle property
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* @phandle_name: Name of property holding a power supply phandle
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*
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* Return: On success returns a reference to a power supply with
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* matching name equals to value under @property, NULL or ERR_PTR otherwise.
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*/
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struct power_supply *devm_power_supply_get_by_phandle(struct device *dev,
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const char *property)
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{
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struct power_supply **ptr, *psy;
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if (!dev->of_node)
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return ERR_PTR(-ENODEV);
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ptr = devres_alloc(devm_power_supply_put, sizeof(*ptr), GFP_KERNEL);
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if (!ptr)
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return ERR_PTR(-ENOMEM);
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psy = power_supply_get_by_phandle(dev->of_node, property);
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if (IS_ERR_OR_NULL(psy)) {
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devres_free(ptr);
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} else {
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*ptr = psy;
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devres_add(dev, ptr);
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}
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return psy;
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}
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EXPORT_SYMBOL_GPL(devm_power_supply_get_by_phandle);
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#endif /* CONFIG_OF */
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int power_supply_get_property(struct power_supply *psy,
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@ -292,10 +292,15 @@ extern void power_supply_put(struct power_supply *psy);
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#ifdef CONFIG_OF
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extern struct power_supply *power_supply_get_by_phandle(struct device_node *np,
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const char *property);
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extern struct power_supply *devm_power_supply_get_by_phandle(
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struct device *dev, const char *property);
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#else /* !CONFIG_OF */
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static inline struct power_supply *
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power_supply_get_by_phandle(struct device_node *np, const char *property)
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{ return NULL; }
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static inline struct power_supply *
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devm_power_supply_get_by_phandle(struct device *dev, const char *property)
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{ return NULL; }
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#endif /* CONFIG_OF */
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extern void power_supply_changed(struct power_supply *psy);
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extern int power_supply_am_i_supplied(struct power_supply *psy);
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