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authorHans de Goede <hdegoede@redhat.com>2015-06-10 00:37:56 +0300
committerSebastian Reichel <sre@kernel.org>2015-06-10 17:15:54 +0300
commitfe27e1dfe9962b07215ee01445926306ddbb7c25 (patch)
treeb0e05cfc8302404ba84e0b4c3d270ff4b4d1b762 /drivers/power/power_supply_core.c
parenta6e6b63ee2798f18e0e786feb407cc7846077ea3 (diff)
downloadlinux-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/power/power_supply_core.c')
-rw-r--r--drivers/power/power_supply_core.c39
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,