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/workqueue.h>
  17 #include <linux/leds.h>
  18
  19 struct device;
  20
  21 /*
  22  * All voltages, currents, charges, energies, time and temperatures in uV,
  23  * µA, µAh, µWh, seconds and tenths of degree Celsius unless otherwise
  24  * stated. It's driver's job to convert its raw values to units in which
  25  * this class operates.
  26  */
  27
  28 /*
  29  * For systems where the charger determines the maximum battery capacity
  30  * the min and max fields should be used to present these values to user
  31  * space. Unused/unknown fields will not appear in sysfs.
  32  */
  33
  34 enum {
  35         POWER_SUPPLY_STATUS_UNKNOWN = 0,
  36         POWER_SUPPLY_STATUS_CHARGING,
  37         POWER_SUPPLY_STATUS_DISCHARGING,
  38         POWER_SUPPLY_STATUS_NOT_CHARGING,
  39         POWER_SUPPLY_STATUS_FULL,
  40 };
  41
  42 enum {
  43         POWER_SUPPLY_CHARGE_TYPE_UNKNOWN = 0,
  44         POWER_SUPPLY_CHARGE_TYPE_NONE,
  45         POWER_SUPPLY_CHARGE_TYPE_TRICKLE,
  46         POWER_SUPPLY_CHARGE_TYPE_FAST,
  47 };
  48
  49 enum {
  50         POWER_SUPPLY_HEALTH_UNKNOWN = 0,
  51         POWER_SUPPLY_HEALTH_GOOD,
  52         POWER_SUPPLY_HEALTH_OVERHEAT,
  53         POWER_SUPPLY_HEALTH_DEAD,
  54         POWER_SUPPLY_HEALTH_OVERVOLTAGE,
  55         POWER_SUPPLY_HEALTH_UNSPEC_FAILURE,
  56         POWER_SUPPLY_HEALTH_COLD,
  57         POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE,
  58         POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE,
  59 };
  60
  61 enum {
  62         POWER_SUPPLY_TECHNOLOGY_UNKNOWN = 0,
  63         POWER_SUPPLY_TECHNOLOGY_NiMH,
  64         POWER_SUPPLY_TECHNOLOGY_LION,
  65         POWER_SUPPLY_TECHNOLOGY_LIPO,
  66         POWER_SUPPLY_TECHNOLOGY_LiFe,
  67         POWER_SUPPLY_TECHNOLOGY_NiCd,
  68         POWER_SUPPLY_TECHNOLOGY_LiMn,
  69 };
  70
  71 enum {
  72         POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN = 0,
  73         POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL,
  74         POWER_SUPPLY_CAPACITY_LEVEL_LOW,
  75         POWER_SUPPLY_CAPACITY_LEVEL_NORMAL,
  76         POWER_SUPPLY_CAPACITY_LEVEL_HIGH,
  77         POWER_SUPPLY_CAPACITY_LEVEL_FULL,
  78 };
  79
  80 enum {
  81         POWER_SUPPLY_SCOPE_UNKNOWN = 0,
  82         POWER_SUPPLY_SCOPE_SYSTEM,
  83         POWER_SUPPLY_SCOPE_DEVICE,
  84 };
  85
  86 enum power_supply_property {
  87         /* Properties of type `int' */
  88         POWER_SUPPLY_PROP_STATUS = 0,
  89         POWER_SUPPLY_PROP_CHARGE_TYPE,
  90         POWER_SUPPLY_PROP_HEALTH,
  91         POWER_SUPPLY_PROP_PRESENT,
  92         POWER_SUPPLY_PROP_ONLINE,
  93         POWER_SUPPLY_PROP_AUTHENTIC,
  94         POWER_SUPPLY_PROP_TECHNOLOGY,
  95         POWER_SUPPLY_PROP_CYCLE_COUNT,
  96         POWER_SUPPLY_PROP_VOLTAGE_MAX,
  97         POWER_SUPPLY_PROP_VOLTAGE_MIN,
  98         POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
  99         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
 100         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 101         POWER_SUPPLY_PROP_VOLTAGE_AVG,
 102         POWER_SUPPLY_PROP_VOLTAGE_OCV,
 103         POWER_SUPPLY_PROP_CURRENT_MAX,
 104         POWER_SUPPLY_PROP_CURRENT_NOW,
 105         POWER_SUPPLY_PROP_CURRENT_AVG,
 106         POWER_SUPPLY_PROP_POWER_NOW,
 107         POWER_SUPPLY_PROP_POWER_AVG,
 108         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 109         POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
 110         POWER_SUPPLY_PROP_CHARGE_FULL,
 111         POWER_SUPPLY_PROP_CHARGE_EMPTY,
 112         POWER_SUPPLY_PROP_CHARGE_NOW,
 113         POWER_SUPPLY_PROP_CHARGE_AVG,
 114         POWER_SUPPLY_PROP_CHARGE_COUNTER,
 115         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
 116         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
 117         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
 118         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
 119         POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
 120         POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
 121         POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
 122         POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN,
 123         POWER_SUPPLY_PROP_ENERGY_FULL,
 124         POWER_SUPPLY_PROP_ENERGY_EMPTY,
 125         POWER_SUPPLY_PROP_ENERGY_NOW,
 126         POWER_SUPPLY_PROP_ENERGY_AVG,
 127         POWER_SUPPLY_PROP_CAPACITY, /* in percents! */
 128         POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN, /* in percents! */
 129         POWER_SUPPLY_PROP_CAPACITY_ALERT_MAX, /* in percents! */
 130         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 131         POWER_SUPPLY_PROP_TEMP,
 132         POWER_SUPPLY_PROP_TEMP_ALERT_MIN,
 133         POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
 134         POWER_SUPPLY_PROP_TEMP_AMBIENT,
 135         POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MIN,
 136         POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MAX,
 137         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 138         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 139         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 140         POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
 141         POWER_SUPPLY_PROP_TYPE, /* use power_supply.type instead */
 142         POWER_SUPPLY_PROP_SCOPE,
 143         /* Properties of type `const char *' */
 144         POWER_SUPPLY_PROP_MODEL_NAME,
 145         POWER_SUPPLY_PROP_MANUFACTURER,
 146         POWER_SUPPLY_PROP_SERIAL_NUMBER,
 147 };
 148
 149 enum power_supply_type {
 150         POWER_SUPPLY_TYPE_UNKNOWN = 0,
 151         POWER_SUPPLY_TYPE_BATTERY,
 152         POWER_SUPPLY_TYPE_UPS,
 153         POWER_SUPPLY_TYPE_MAINS,
 154         POWER_SUPPLY_TYPE_USB,          /* Standard Downstream Port */
 155         POWER_SUPPLY_TYPE_USB_DCP,      /* Dedicated Charging Port */
 156         POWER_SUPPLY_TYPE_USB_CDP,      /* Charging Downstream Port */
 157         POWER_SUPPLY_TYPE_USB_ACA,      /* Accessory Charger Adapters */
 158 };
 159
 160 union power_supply_propval {
 161         int intval;
 162         const char *strval;
 163 };
 164
 165 struct power_supply {
 166         const char *name;
 167         enum power_supply_type type;
 168         enum power_supply_property *properties;
 169         size_t num_properties;
 170
 171         char **supplied_to;
 172         size_t num_supplicants;
 173
 174         char **supplied_from;
 175         size_t num_supplies;
 176 #ifdef CONFIG_OF
 177         struct device_node *of_node;
 178 #endif
 179
 180         int (*get_property)(struct power_supply *psy,
 181                             enum power_supply_property psp,
 182                             union power_supply_propval *val);
 183         int (*set_property)(struct power_supply *psy,
 184                             enum power_supply_property psp,
 185                             const union power_supply_propval *val);
 186         int (*property_is_writeable)(struct power_supply *psy,
 187                                      enum power_supply_property psp);
 188         void (*external_power_changed)(struct power_supply *psy);
 189         void (*set_charged)(struct power_supply *psy);
 190
 191         /* For APM emulation, think legacy userspace. */
 192         int use_for_apm;
 193
 194         /* private */
 195         struct device *dev;
 196         struct work_struct changed_work;
 197 #ifdef CONFIG_THERMAL
 198         struct thermal_zone_device *tzd;
 199         struct thermal_cooling_device *tcd;
 200 #endif
 201
 202 #ifdef CONFIG_LEDS_TRIGGERS
 203         struct led_trigger *charging_full_trig;
 204         char *charging_full_trig_name;
 205         struct led_trigger *charging_trig;
 206         char *charging_trig_name;
 207         struct led_trigger *full_trig;
 208         char *full_trig_name;
 209         struct led_trigger *online_trig;
 210         char *online_trig_name;
 211         struct led_trigger *charging_blink_full_solid_trig;
 212         char *charging_blink_full_solid_trig_name;
 213 #endif
 214 };
 215
 216 /*
 217  * This is recommended structure to specify static power supply parameters.
 218  * Generic one, parametrizable for different power supplies. Power supply
 219  * class itself does not use it, but that's what implementing most platform
 220  * drivers, should try reuse for consistency.
 221  */
 222
 223 struct power_supply_info {
 224         const char *name;
 225         int technology;
 226         int voltage_max_design;
 227         int voltage_min_design;
 228         int charge_full_design;
 229         int charge_empty_design;
 230         int energy_full_design;
 231         int energy_empty_design;
 232         int use_for_apm;
 233 };
 234
 235 extern struct power_supply *power_supply_get_by_name(const char *name);
 236 extern void power_supply_changed(struct power_supply *psy);
 237 extern int power_supply_am_i_supplied(struct power_supply *psy);
 238 extern int power_supply_set_battery_charged(struct power_supply *psy);
 239
 240 #ifdef CONFIG_POWER_SUPPLY
 241 extern int power_supply_is_system_supplied(void);
 242 #else
 243 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
 244 #endif
 245
 246 extern int power_supply_register(struct device *parent,
 247                                  struct power_supply *psy);
 248 extern void power_supply_unregister(struct power_supply *psy);
 249 extern int power_supply_powers(struct power_supply *psy, struct device *dev);
 250
 251 /* For APM emulation, think legacy userspace. */
 252 extern struct class *power_supply_class;
 253
 254 static inline bool power_supply_is_amp_property(enum power_supply_property psp)
 255 {
 256         switch (psp) {
 257         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 258         case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
 259         case POWER_SUPPLY_PROP_CHARGE_FULL:
 260         case POWER_SUPPLY_PROP_CHARGE_EMPTY:
 261         case POWER_SUPPLY_PROP_CHARGE_NOW:
 262         case POWER_SUPPLY_PROP_CHARGE_AVG:
 263         case POWER_SUPPLY_PROP_CHARGE_COUNTER:
 264         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 265         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
 266         case POWER_SUPPLY_PROP_CURRENT_MAX:
 267         case POWER_SUPPLY_PROP_CURRENT_NOW:
 268         case POWER_SUPPLY_PROP_CURRENT_AVG:
 269                 return 1;
 270         default:
 271                 break;
 272         }
 273
 274         return 0;
 275 }
 276
 277 static inline bool power_supply_is_watt_property(enum power_supply_property psp)
 278 {
 279         switch (psp) {
 280         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
 281         case POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN:
 282         case POWER_SUPPLY_PROP_ENERGY_FULL:
 283         case POWER_SUPPLY_PROP_ENERGY_EMPTY:
 284         case POWER_SUPPLY_PROP_ENERGY_NOW:
 285         case POWER_SUPPLY_PROP_ENERGY_AVG:
 286         case POWER_SUPPLY_PROP_VOLTAGE_MAX:
 287         case POWER_SUPPLY_PROP_VOLTAGE_MIN:
 288         case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
 289         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
 290         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 291         case POWER_SUPPLY_PROP_VOLTAGE_AVG:
 292         case POWER_SUPPLY_PROP_VOLTAGE_OCV:
 293         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 294         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
 295         case POWER_SUPPLY_PROP_POWER_NOW:
 296                 return 1;
 297         default:
 298                 break;
 299         }
 300
 301         return 0;
 302 }
 303
 304 #endif /* __LINUX_POWER_SUPPLY_H__ */