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authorSebastian Reichel <sre@debian.org>2013-11-24 17:49:29 +0100
committerAnton Vorontsov <anton@enomsg.org>2013-12-23 18:21:11 -0800
commitabce97708a9b5ba897ad94fa289804d8af8d3ea9 (patch)
tree130cb8a31d312f755b0f26303218b377863c3b7c /drivers/power
parent32260308b4cafcd71b1c0aac35675dc68120c33d (diff)
power_supply: Add power_supply_get_by_phandle
Add method to get power supply by device tree phandle. Signed-off-by: Sebastian Reichel <sre@debian.org> Reviewed-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Anton Vorontsov <anton@enomsg.org>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/power_supply_core.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 6aac23cc6566..26606641fe44 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -341,6 +341,32 @@ struct power_supply *power_supply_get_by_name(const char *name)
}
EXPORT_SYMBOL_GPL(power_supply_get_by_name);
+#ifdef CONFIG_OF
+static int power_supply_match_device_node(struct device *dev, const void *data)
+{
+ return dev->parent && dev->parent->of_node == data;
+}
+
+struct power_supply *power_supply_get_by_phandle(struct device_node *np,
+ const char *property)
+{
+ struct device_node *power_supply_np;
+ struct device *dev;
+
+ power_supply_np = of_parse_phandle(np, property, 0);
+ if (!power_supply_np)
+ return ERR_PTR(-ENODEV);
+
+ dev = class_find_device(power_supply_class, NULL, power_supply_np,
+ power_supply_match_device_node);
+
+ of_node_put(power_supply_np);
+
+ return dev ? dev_get_drvdata(dev) : NULL;
+}
+EXPORT_SYMBOL_GPL(power_supply_get_by_phandle);
+#endif /* CONFIG_OF */
+
int power_supply_powers(struct power_supply *psy, struct device *dev)
{
return sysfs_create_link(&psy->dev->kobj, &dev->kobj, "powers");