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author | Hans de Goede <hdegoede@redhat.com> | 2015-06-09 21:37:56 (GMT) |
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committer | Sebastian Reichel <sre@kernel.org> | 2015-06-10 14:15:54 (GMT) |
commit | fe27e1dfe9962b07215ee01445926306ddbb7c25 (patch) | |
tree | b0e05cfc8302404ba84e0b4c3d270ff4b4d1b762 /drivers | |
parent | a6e6b63ee2798f18e0e786feb407cc7846077ea3 (diff) | |
download | linux-fe27e1dfe9962b07215ee01445926306ddbb7c25.tar.xz |
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>
Diffstat (limited to 'drivers')
-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 4bc0c7f..a44d455 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, |