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_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__ */