power_supply.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 *  Functions private to power supply class
 4 *
 5 *  Copyright © 2007  Anton Vorontsov <cbou@mail.ru>
 6 *  Copyright © 2004  Szabolcs Gyurko
 7 *  Copyright © 2003  Ian Molton <spyro@f2s.com>
 8 *
 9 *  Modified: 2004, Oct     Szabolcs Gyurko
10 */
11
12#include <linux/lockdep.h>
13
14struct device;
15struct device_type;
16struct power_supply;
17
18extern int power_supply_property_is_writeable(struct power_supply *psy,
19					      enum power_supply_property psp);
20extern bool power_supply_has_property(struct power_supply *psy,
21				      enum power_supply_property psp);
22extern bool power_supply_ext_has_property(const struct power_supply_ext *ext,
23					  enum power_supply_property psp);
24
25struct power_supply_ext_registration {
26	struct list_head list_head;
27	const struct power_supply_ext *ext;
28	struct device *dev;
29	void *data;
30};
31
32/* Make sure that the macro is a single expression */
33#define power_supply_for_each_extension(pos, psy)			\
34	if ( ({ lockdep_assert_held(&(psy)->extensions_sem); 0; }) )	\
35		;							\
36	else								\
37		list_for_each_entry(pos, &(psy)->extensions, list_head)	\
38
39#ifdef CONFIG_SYSFS
40
41extern void __init power_supply_init_attrs(void);
42extern int power_supply_uevent(const struct device *dev, struct kobj_uevent_env *env);
43extern const struct attribute_group *power_supply_attr_groups[];
44extern int power_supply_sysfs_add_extension(struct power_supply *psy,
45					    const struct power_supply_ext *ext,
46					    struct device *dev);
47extern void power_supply_sysfs_remove_extension(struct power_supply *psy,
48						const struct power_supply_ext *ext);
49
50#else
51
52static inline void power_supply_init_attrs(void) {}
53#define power_supply_attr_groups NULL
54#define power_supply_uevent NULL
55static inline int power_supply_sysfs_add_extension(struct power_supply *psy,
56						   const struct power_supply_ext *ext,
57						   struct device *dev)
58{ return 0; }
59static inline void power_supply_sysfs_remove_extension(struct power_supply *psy,
60						       const struct power_supply_ext *ext) {}
61
62#endif /* CONFIG_SYSFS */
63
64#ifdef CONFIG_LEDS_TRIGGERS
65
66extern void power_supply_update_leds(struct power_supply *psy);
67extern int power_supply_create_triggers(struct power_supply *psy);
68extern void power_supply_remove_triggers(struct power_supply *psy);
69
70#else
71
72static inline void power_supply_update_leds(struct power_supply *psy) {}
73static inline int power_supply_create_triggers(struct power_supply *psy)
74{ return 0; }
75static inline void power_supply_remove_triggers(struct power_supply *psy) {}
76
77#endif /* CONFIG_LEDS_TRIGGERS */
78
79#ifdef CONFIG_POWER_SUPPLY_HWMON
80
81int power_supply_add_hwmon_sysfs(struct power_supply *psy);
82void power_supply_remove_hwmon_sysfs(struct power_supply *psy);
83
84#else
85
86static inline int power_supply_add_hwmon_sysfs(struct power_supply *psy)
87{
88	return 0;
89}
90
91static inline
92void power_supply_remove_hwmon_sysfs(struct power_supply *psy) {}
93
94#endif /* CONFIG_POWER_SUPPLY_HWMON */