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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>
This commit is contained in:
Sebastian Reichel 2013-11-24 17:49:29 +01:00 committed by Anton Vorontsov
parent 32260308b4
commit abce97708a
2 changed files with 34 additions and 0 deletions
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26
drivers/power/power_supply_core.c
View File

@ -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");

8
include/linux/power_supply.h
View File

@ -244,6 +244,14 @@ extern struct atomic_notifier_head power_supply_notifier;
extern int power_supply_reg_notifier(struct notifier_block *nb);
extern void power_supply_unreg_notifier(struct notifier_block *nb);
extern struct power_supply *power_supply_get_by_name(const char *name);
#ifdef CONFIG_OF
extern struct power_supply *power_supply_get_by_phandle(struct device_node *np,
const char *property);
#else /* !CONFIG_OF */
static inline struct power_supply *
power_supply_get_by_phandle(struct device_node *np, const char *property)
{ return NULL; }
#endif /* CONFIG_OF */
extern void power_supply_changed(struct power_supply *psy);
extern int power_supply_am_i_supplied(struct power_supply *psy);
extern int power_supply_set_battery_charged(struct power_supply *psy);