1 /*
2 * Universal power supply monitor class
3 *
4 * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
5 * Copyright © 2004 Szabolcs Gyurko
6 * Copyright © 2003 Ian Molton <spyro@f2s.com>
7 *
8 * Modified: 2004, Oct Szabolcs Gyurko
9 *
10 * You may use this code as per GPL version 2
11 */
12
13 #ifndef __LINUX_POWER_SUPPLY_H__
14 #define __LINUX_POWER_SUPPLY_H__
15
16 #include <linux/device.h>
17 #include <linux/workqueue.h>
18 #include <linux/leds.h>
19
20 /*
21 * All voltages, currents, charges, energies, time and temperatures in uV,
22 * µA, µAh, µWh, seconds and tenths of degree Celsius unless otherwise
23 * stated. It's driver's job to convert its raw values to units in which
24 * this class operates.
25 */
26
27 /*
28 * For systems where the charger determines the maximum battery capacity
29 * the min and max fields should be used to present these values to user
30 * space. Unused/unknown fields will not appear in sysfs.
31 */
32
33 enum {
34 POWER_SUPPLY_STATUS_UNKNOWN = 0,
35 POWER_SUPPLY_STATUS_CHARGING,
36 POWER_SUPPLY_STATUS_DISCHARGING,
37 POWER_SUPPLY_STATUS_NOT_CHARGING,
38 POWER_SUPPLY_STATUS_FULL,
39 };
40
41 enum {
42 POWER_SUPPLY_HEALTH_UNKNOWN = 0,
43 POWER_SUPPLY_HEALTH_GOOD,
44 POWER_SUPPLY_HEALTH_OVERHEAT,
45 POWER_SUPPLY_HEALTH_DEAD,
46 POWER_SUPPLY_HEALTH_OVERVOLTAGE,
47 POWER_SUPPLY_HEALTH_UNSPEC_FAILURE,
48 POWER_SUPPLY_HEALTH_COLD,
49 };
50
51 enum {
52 POWER_SUPPLY_TECHNOLOGY_UNKNOWN = 0,
53 POWER_SUPPLY_TECHNOLOGY_NiMH,
54 POWER_SUPPLY_TECHNOLOGY_LION,
55 POWER_SUPPLY_TECHNOLOGY_LIPO,
56 POWER_SUPPLY_TECHNOLOGY_LiFe,
57 POWER_SUPPLY_TECHNOLOGY_NiCd,
58 POWER_SUPPLY_TECHNOLOGY_LiMn,
59 };
60
61 enum power_supply_property {
62 /* Properties of type `int' */
63 POWER_SUPPLY_PROP_STATUS = 0,
64 POWER_SUPPLY_PROP_HEALTH,
65 POWER_SUPPLY_PROP_PRESENT,
66 POWER_SUPPLY_PROP_ONLINE,
67 POWER_SUPPLY_PROP_TECHNOLOGY,
68 POWER_SUPPLY_PROP_VOLTAGE_MAX,
69 POWER_SUPPLY_PROP_VOLTAGE_MIN,
70 POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
71 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
72 POWER_SUPPLY_PROP_VOLTAGE_NOW,
73 POWER_SUPPLY_PROP_VOLTAGE_AVG,
74 POWER_SUPPLY_PROP_CURRENT_NOW,
75 POWER_SUPPLY_PROP_CURRENT_AVG,
76 POWER_SUPPLY_PROP_POWER_NOW,
77 POWER_SUPPLY_PROP_POWER_AVG,
78 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
79 POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
80 POWER_SUPPLY_PROP_CHARGE_FULL,
81 POWER_SUPPLY_PROP_CHARGE_EMPTY,
82 POWER_SUPPLY_PROP_CHARGE_NOW,
83 POWER_SUPPLY_PROP_CHARGE_AVG,
84 POWER_SUPPLY_PROP_CHARGE_COUNTER,
85 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
86 POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN,
87 POWER_SUPPLY_PROP_ENERGY_FULL,
88 POWER_SUPPLY_PROP_ENERGY_EMPTY,
89 POWER_SUPPLY_PROP_ENERGY_NOW,
90 POWER_SUPPLY_PROP_ENERGY_AVG,
91 POWER_SUPPLY_PROP_CAPACITY, /* in percents! */
92 POWER_SUPPLY_PROP_TEMP,
93 POWER_SUPPLY_PROP_TEMP_AMBIENT,
94 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
95 POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
96 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
97 POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
98 /* Properties of type `const char *' */
99 POWER_SUPPLY_PROP_MODEL_NAME,
100 POWER_SUPPLY_PROP_MANUFACTURER,
101 POWER_SUPPLY_PROP_SERIAL_NUMBER,
102 };
103
104 enum power_supply_type {
105 POWER_SUPPLY_TYPE_BATTERY = 0,
106 POWER_SUPPLY_TYPE_UPS,
107 POWER_SUPPLY_TYPE_MAINS,
108 POWER_SUPPLY_TYPE_USB,
109 };
110
111 union power_supply_propval {
112 int intval;
113 const char *strval;
114 };
115
116 struct power_supply {
117 const char *name;
118 enum power_supply_type type;
119 enum power_supply_property *properties;
120 size_t num_properties;
121
122 char **supplied_to;
123 size_t num_supplicants;
124
125 int (*get_property)(struct power_supply *psy,
126 enum power_supply_property psp,
127 union power_supply_propval *val);
128 void (*external_power_changed)(struct power_supply *psy);
129
130 /* For APM emulation, think legacy userspace. */
131 int use_for_apm;
132
133 /* private */
134 struct device *dev;
135 struct work_struct changed_work;
136
137 #ifdef CONFIG_LEDS_TRIGGERS
138 struct led_trigger *charging_full_trig;
139 char *charging_full_trig_name;
140 struct led_trigger *charging_trig;
141 char *charging_trig_name;
142 struct led_trigger *full_trig;
143 char *full_trig_name;
144 struct led_trigger *online_trig;
145 char *online_trig_name;
146 #endif
147 };
148
149 /*
150 * This is recommended structure to specify static power supply parameters.
151 * Generic one, parametrizable for different power supplies. Power supply
152 * class itself does not use it, but that's what implementing most platform
153 * drivers, should try reuse for consistency.
154 */
155
156 struct power_supply_info {
157 const char *name;
158 int technology;
159 int voltage_max_design;
160 int voltage_min_design;
161 int charge_full_design;
162 int charge_empty_design;
163 int energy_full_design;
164 int energy_empty_design;
165 int use_for_apm;
166 };
167
168 extern void power_supply_changed(struct power_supply *psy);
169 extern int power_supply_am_i_supplied(struct power_supply *psy);
170
171 #if defined(CONFIG_POWER_SUPPLY) || defined(CONFIG_POWER_SUPPLY_MODULE)
172 extern int power_supply_is_system_supplied(void);
173 #else
174 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
175 #endif
176
177 extern int power_supply_register(struct device *parent,
178 struct power_supply *psy);
179 extern void power_supply_unregister(struct power_supply *psy);
180
181 /* For APM emulation, think legacy userspace. */
182 extern struct class *power_supply_class;
183
184 #endif /* __LINUX_POWER_SUPPLY_H__ */
185
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