include/linux/power_supply.h

   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_CHARGE_TYPE_UNKNOWN = 0,
  43         POWER_SUPPLY_CHARGE_TYPE_NONE,
  44         POWER_SUPPLY_CHARGE_TYPE_TRICKLE,
  45         POWER_SUPPLY_CHARGE_TYPE_FAST,
  46 };
  47
  48 enum {
  49         POWER_SUPPLY_HEALTH_UNKNOWN = 0,
  50         POWER_SUPPLY_HEALTH_GOOD,
  51         POWER_SUPPLY_HEALTH_OVERHEAT,
  52         POWER_SUPPLY_HEALTH_DEAD,
  53         POWER_SUPPLY_HEALTH_OVERVOLTAGE,
  54         POWER_SUPPLY_HEALTH_UNSPEC_FAILURE,
  55         POWER_SUPPLY_HEALTH_COLD,
  56 };
  57
  58 enum {
  59         POWER_SUPPLY_TECHNOLOGY_UNKNOWN = 0,
  60         POWER_SUPPLY_TECHNOLOGY_NiMH,
  61         POWER_SUPPLY_TECHNOLOGY_LION,
  62         POWER_SUPPLY_TECHNOLOGY_LIPO,
  63         POWER_SUPPLY_TECHNOLOGY_LiFe,
  64         POWER_SUPPLY_TECHNOLOGY_NiCd,
  65         POWER_SUPPLY_TECHNOLOGY_LiMn,
  66 };
  67
  68 enum {
  69         POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN = 0,
  70         POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL,
  71         POWER_SUPPLY_CAPACITY_LEVEL_LOW,
  72         POWER_SUPPLY_CAPACITY_LEVEL_NORMAL,
  73         POWER_SUPPLY_CAPACITY_LEVEL_HIGH,
  74         POWER_SUPPLY_CAPACITY_LEVEL_FULL,
  75 };
  76
  77 enum power_supply_property {
  78         /* Properties of type `int' */
  79         POWER_SUPPLY_PROP_STATUS = 0,
  80         POWER_SUPPLY_PROP_CHARGE_TYPE,
  81         POWER_SUPPLY_PROP_HEALTH,
  82         POWER_SUPPLY_PROP_PRESENT,
  83         POWER_SUPPLY_PROP_ONLINE,
  84         POWER_SUPPLY_PROP_TECHNOLOGY,
  85         POWER_SUPPLY_PROP_VOLTAGE_MAX,
  86         POWER_SUPPLY_PROP_VOLTAGE_MIN,
  87         POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
  88         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
  89         POWER_SUPPLY_PROP_VOLTAGE_NOW,
  90         POWER_SUPPLY_PROP_VOLTAGE_AVG,
  91         POWER_SUPPLY_PROP_CURRENT_NOW,
  92         POWER_SUPPLY_PROP_CURRENT_AVG,
  93         POWER_SUPPLY_PROP_POWER_NOW,
  94         POWER_SUPPLY_PROP_POWER_AVG,
  95         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
  96         POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
  97         POWER_SUPPLY_PROP_CHARGE_FULL,
  98         POWER_SUPPLY_PROP_CHARGE_EMPTY,
  99         POWER_SUPPLY_PROP_CHARGE_NOW,
 100         POWER_SUPPLY_PROP_CHARGE_AVG,
 101         POWER_SUPPLY_PROP_CHARGE_COUNTER,
 102         POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
 103         POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN,
 104         POWER_SUPPLY_PROP_ENERGY_FULL,
 105         POWER_SUPPLY_PROP_ENERGY_EMPTY,
 106         POWER_SUPPLY_PROP_ENERGY_NOW,
 107         POWER_SUPPLY_PROP_ENERGY_AVG,
 108         POWER_SUPPLY_PROP_CAPACITY, /* in percents! */
 109         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 110         POWER_SUPPLY_PROP_TEMP,
 111         POWER_SUPPLY_PROP_TEMP_AMBIENT,
 112         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 113         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 114         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 115         POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
 116         /* Properties of type `const char *' */
 117         POWER_SUPPLY_PROP_MODEL_NAME,
 118         POWER_SUPPLY_PROP_MANUFACTURER,
 119         POWER_SUPPLY_PROP_SERIAL_NUMBER,
 120 };
 121
 122 enum power_supply_type {
 123         POWER_SUPPLY_TYPE_BATTERY = 0,
 124         POWER_SUPPLY_TYPE_UPS,
 125         POWER_SUPPLY_TYPE_MAINS,
 126         POWER_SUPPLY_TYPE_USB,
 127 };
 128
 129 union power_supply_propval {
 130         int intval;
 131         const char *strval;
 132 };
 133
 134 struct power_supply {
 135         const char *name;
 136         enum power_supply_type type;
 137         enum power_supply_property *properties;
 138         size_t num_properties;
 139
 140         char **supplied_to;
 141         size_t num_supplicants;
 142
 143         int (*get_property)(struct power_supply *psy,
 144                             enum power_supply_property psp,
 145                             union power_supply_propval *val);
 146         void (*external_power_changed)(struct power_supply *psy);
 147         void (*set_charged)(struct power_supply *psy);
 148
 149         /* For APM emulation, think legacy userspace. */
 150         int use_for_apm;
 151
 152         /* private */
 153         struct device *dev;
 154         struct work_struct changed_work;
 155
 156 #ifdef CONFIG_LEDS_TRIGGERS
 157         struct led_trigger *charging_full_trig;
 158         char *charging_full_trig_name;
 159         struct led_trigger *charging_trig;
 160         char *charging_trig_name;
 161         struct led_trigger *full_trig;
 162         char *full_trig_name;
 163         struct led_trigger *online_trig;
 164         char *online_trig_name;
 165 #endif
 166 };
 167
 168 /*
 169  * This is recommended structure to specify static power supply parameters.
 170  * Generic one, parametrizable for different power supplies. Power supply
 171  * class itself does not use it, but that's what implementing most platform
 172  * drivers, should try reuse for consistency.
 173  */
 174
 175 struct power_supply_info {
 176         const char *name;
 177         int technology;
 178         int voltage_max_design;
 179         int voltage_min_design;
 180         int charge_full_design;
 181         int charge_empty_design;
 182         int energy_full_design;
 183         int energy_empty_design;
 184         int use_for_apm;
 185 };
 186
 187 extern struct power_supply *power_supply_get_by_name(char *name);
 188 extern void power_supply_changed(struct power_supply *psy);
 189 extern int power_supply_am_i_supplied(struct power_supply *psy);
 190 extern int power_supply_set_battery_charged(struct power_supply *psy);
 191
 192 #if defined(CONFIG_POWER_SUPPLY) || defined(CONFIG_POWER_SUPPLY_MODULE)
 193 extern int power_supply_is_system_supplied(void);
 194 #else
 195 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
 196 #endif
 197
 198 extern int power_supply_register(struct device *parent,
 199                                  struct power_supply *psy);
 200 extern void power_supply_unregister(struct power_supply *psy);
 201
 202 /* For APM emulation, think legacy userspace. */
 203 extern struct class *power_supply_class;
 204
 205 #endif /* __LINUX_POWER_SUPPLY_H__ */