kernel/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 #include <linux/spinlock.h>
  20 #include <linux/notifier.h>
  21
  22 /*
  23  * All voltages, currents, charges, energies, time and temperatures in uV,
  24  * µA, µAh, µWh, seconds and tenths of degree Celsius unless otherwise
  25  * stated. It's driver's job to convert its raw values to units in which
  26  * this class operates.
  27  */
  28
  29 /*
  30  * For systems where the charger determines the maximum battery capacity
  31  * the min and max fields should be used to present these values to user
  32  * space. Unused/unknown fields will not appear in sysfs.
  33  */
  34
  35 enum {
  36         POWER_SUPPLY_STATUS_UNKNOWN = 0,
  37         POWER_SUPPLY_STATUS_CHARGING,
  38         POWER_SUPPLY_STATUS_DISCHARGING,
  39         POWER_SUPPLY_STATUS_NOT_CHARGING,
  40         POWER_SUPPLY_STATUS_FULL,
  41 };
  42
  43 enum {
  44         POWER_SUPPLY_CHARGE_TYPE_UNKNOWN = 0,
  45         POWER_SUPPLY_CHARGE_TYPE_NONE,
  46         POWER_SUPPLY_CHARGE_TYPE_TRICKLE,
  47         POWER_SUPPLY_CHARGE_TYPE_FAST,
  48 };
  49
  50 enum {
  51         POWER_SUPPLY_HEALTH_UNKNOWN = 0,
  52         POWER_SUPPLY_HEALTH_GOOD,
  53         POWER_SUPPLY_HEALTH_OVERHEAT,
  54         POWER_SUPPLY_HEALTH_DEAD,
  55         POWER_SUPPLY_HEALTH_OVERVOLTAGE,
  56         POWER_SUPPLY_HEALTH_UNSPEC_FAILURE,
  57         POWER_SUPPLY_HEALTH_COLD,
  58         POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE,
  59         POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE,
  60 };
  61
  62 enum {
  63         POWER_SUPPLY_TECHNOLOGY_UNKNOWN = 0,
  64         POWER_SUPPLY_TECHNOLOGY_NiMH,
  65         POWER_SUPPLY_TECHNOLOGY_LION,
  66         POWER_SUPPLY_TECHNOLOGY_LIPO,
  67         POWER_SUPPLY_TECHNOLOGY_LiFe,
  68         POWER_SUPPLY_TECHNOLOGY_NiCd,
  69         POWER_SUPPLY_TECHNOLOGY_LiMn,
  70 };
  71
  72 enum {
  73         POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN = 0,
  74         POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL,
  75         POWER_SUPPLY_CAPACITY_LEVEL_LOW,
  76         POWER_SUPPLY_CAPACITY_LEVEL_NORMAL,
  77         POWER_SUPPLY_CAPACITY_LEVEL_HIGH,
  78         POWER_SUPPLY_CAPACITY_LEVEL_FULL,
  79 };
  80
  81 enum {
  82         POWER_SUPPLY_SCOPE_UNKNOWN = 0,
  83         POWER_SUPPLY_SCOPE_SYSTEM,
  84         POWER_SUPPLY_SCOPE_DEVICE,
  85 };
  86
  87 enum power_supply_property {
  88         /* Properties of type `int' */
  89         POWER_SUPPLY_PROP_STATUS = 0,
  90         POWER_SUPPLY_PROP_CHARGE_TYPE,
  91         POWER_SUPPLY_PROP_HEALTH,
  92         POWER_SUPPLY_PROP_PRESENT,
  93         POWER_SUPPLY_PROP_ONLINE,
  94         POWER_SUPPLY_PROP_AUTHENTIC,
  95         POWER_SUPPLY_PROP_TECHNOLOGY,
  96         POWER_SUPPLY_PROP_CYCLE_COUNT,
  97         POWER_SUPPLY_PROP_VOLTAGE_MAX,
  98         POWER_SUPPLY_PROP_VOLTAGE_MIN,
  99         POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
 100         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
 101         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 102         POWER_SUPPLY_PROP_VOLTAGE_AVG,
 103         POWER_SUPPLY_PROP_VOLTAGE_OCV,
 104         POWER_SUPPLY_PROP_VOLTAGE_BOOT,
 105         POWER_SUPPLY_PROP_CURRENT_MAX,
 106         POWER_SUPPLY_PROP_CURRENT_NOW,
 107         POWER_SUPPLY_PROP_CURRENT_AVG,
 108         POWER_SUPPLY_PROP_CURRENT_BOOT,
 109         POWER_SUPPLY_PROP_POWER_NOW,
 110         POWER_SUPPLY_PROP_POWER_AVG,
 111         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 112         POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
 113         POWER_SUPPLY_PROP_CHARGE_FULL,
 114         POWER_SUPPLY_PROP_CHARGE_EMPTY,
 115         POWER_SUPPLY_PROP_CHARGE_NOW,
 116         POWER_SUPPLY_PROP_CHARGE_AVG,
 117         POWER_SUPPLY_PROP_CHARGE_COUNTER,
 118         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
 119         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
 120         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
 121         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
 122         POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
 123         POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
 124         POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
 125         POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
 126         POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN,
 127         POWER_SUPPLY_PROP_ENERGY_FULL,
 128         POWER_SUPPLY_PROP_ENERGY_EMPTY,
 129         POWER_SUPPLY_PROP_ENERGY_NOW,
 130         POWER_SUPPLY_PROP_ENERGY_AVG,
 131         POWER_SUPPLY_PROP_CAPACITY, /* in percents! */
 132         POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN, /* in percents! */
 133         POWER_SUPPLY_PROP_CAPACITY_ALERT_MAX, /* in percents! */
 134         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 135         POWER_SUPPLY_PROP_TEMP,
 136         POWER_SUPPLY_PROP_TEMP_MAX,
 137         POWER_SUPPLY_PROP_TEMP_MIN,
 138         POWER_SUPPLY_PROP_TEMP_ALERT_MIN,
 139         POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
 140         POWER_SUPPLY_PROP_TEMP_AMBIENT,
 141         POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MIN,
 142         POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MAX,
 143         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 144         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 145         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 146         POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
 147         POWER_SUPPLY_PROP_TYPE, /* use power_supply.type instead */
 148         POWER_SUPPLY_PROP_SCOPE,
 149         POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
 150         POWER_SUPPLY_PROP_CALIBRATE,
 151         /* Properties of type `const char *' */
 152         POWER_SUPPLY_PROP_MODEL_NAME,
 153         POWER_SUPPLY_PROP_MANUFACTURER,
 154         POWER_SUPPLY_PROP_SERIAL_NUMBER,
 155 };
 156
 157 enum power_supply_type {
 158         POWER_SUPPLY_TYPE_UNKNOWN = 0,
 159         POWER_SUPPLY_TYPE_BATTERY,
 160         POWER_SUPPLY_TYPE_UPS,
 161         POWER_SUPPLY_TYPE_MAINS,
 162         POWER_SUPPLY_TYPE_USB,          /* Standard Downstream Port */
 163         POWER_SUPPLY_TYPE_USB_DCP,      /* Dedicated Charging Port */
 164         POWER_SUPPLY_TYPE_USB_CDP,      /* Charging Downstream Port */
 165         POWER_SUPPLY_TYPE_USB_ACA,      /* Accessory Charger Adapters */
 166 };
 167
 168 enum power_supply_notifier_events {
 169         PSY_EVENT_PROP_CHANGED,
 170 };
 171
 172 union power_supply_propval {
 173         int intval;
 174         const char *strval;
 175 };
 176
 177 struct device_node;
 178 struct power_supply;
 179
 180 /* Run-time specific power supply configuration */
 181 struct power_supply_config {
 182         struct device_node *of_node;
 183         /* Driver private data */
 184         void *drv_data;
 185
 186         char **supplied_to;
 187         size_t num_supplicants;
 188 };
 189
 190 /* Description of power supply */
 191 struct power_supply_desc {
 192         const char *name;
 193         enum power_supply_type type;
 194         enum power_supply_property *properties;
 195         size_t num_properties;
 196
 197         /*
 198          * Functions for drivers implementing power supply class.
 199          * These shouldn't be called directly by other drivers for accessing
 200          * this power supply. Instead use power_supply_*() functions (for
 201          * example power_supply_get_property()).
 202          */
 203         int (*get_property)(struct power_supply *psy,
 204                             enum power_supply_property psp,
 205                             union power_supply_propval *val);
 206         int (*set_property)(struct power_supply *psy,
 207                             enum power_supply_property psp,
 208                             const union power_supply_propval *val);
 209         int (*property_is_writeable)(struct power_supply *psy,
 210                                      enum power_supply_property psp);
 211         void (*external_power_changed)(struct power_supply *psy);
 212         void (*set_charged)(struct power_supply *psy);
 213
 214         /*
 215          * Set if thermal zone should not be created for this power supply.
 216          * For example for virtual supplies forwarding calls to actual
 217          * sensors or other supplies.
 218          */
 219         bool no_thermal;
 220         /* For APM emulation, think legacy userspace. */
 221         int use_for_apm;
 222 };
 223
 224 struct power_supply {
 225         const struct power_supply_desc *desc;
 226
 227         char **supplied_to;
 228         size_t num_supplicants;
 229
 230         char **supplied_from;
 231         size_t num_supplies;
 232         struct device_node *of_node;
 233
 234         /* Driver private data */
 235         void *drv_data;
 236
 237         /* private */
 238         struct device dev;
 239         struct work_struct changed_work;
 240         struct delayed_work deferred_register_work;
 241         spinlock_t changed_lock;
 242         bool changed;
 243         atomic_t use_cnt;
 244 #ifdef CONFIG_THERMAL
 245         struct thermal_zone_device *tzd;
 246         struct thermal_cooling_device *tcd;
 247 #endif
 248
 249 #ifdef CONFIG_LEDS_TRIGGERS
 250         struct led_trigger *charging_full_trig;
 251         char *charging_full_trig_name;
 252         struct led_trigger *charging_trig;
 253         char *charging_trig_name;
 254         struct led_trigger *full_trig;
 255         char *full_trig_name;
 256         struct led_trigger *online_trig;
 257         char *online_trig_name;
 258         struct led_trigger *charging_blink_full_solid_trig;
 259         char *charging_blink_full_solid_trig_name;
 260 #endif
 261 };
 262
 263 /*
 264  * This is recommended structure to specify static power supply parameters.
 265  * Generic one, parametrizable for different power supplies. Power supply
 266  * class itself does not use it, but that's what implementing most platform
 267  * drivers, should try reuse for consistency.
 268  */
 269
 270 struct power_supply_info {
 271         const char *name;
 272         int technology;
 273         int voltage_max_design;
 274         int voltage_min_design;
 275         int charge_full_design;
 276         int charge_empty_design;
 277         int energy_full_design;
 278         int energy_empty_design;
 279         int use_for_apm;
 280 };
 281
 282 extern struct atomic_notifier_head power_supply_notifier;
 283 extern int power_supply_reg_notifier(struct notifier_block *nb);
 284 extern void power_supply_unreg_notifier(struct notifier_block *nb);
 285 extern struct power_supply *power_supply_get_by_name(const char *name);
 286 extern void power_supply_put(struct power_supply *psy);
 287 #ifdef CONFIG_OF
 288 extern struct power_supply *power_supply_get_by_phandle(struct device_node *np,
 289                                                         const char *property);
 290 #else /* !CONFIG_OF */
 291 static inline struct power_supply *
 292 power_supply_get_by_phandle(struct device_node *np, const char *property)
 293 { return NULL; }
 294 #endif /* CONFIG_OF */
 295 extern void power_supply_changed(struct power_supply *psy);
 296 extern int power_supply_am_i_supplied(struct power_supply *psy);
 297 extern int power_supply_set_battery_charged(struct power_supply *psy);
 298
 299 #ifdef CONFIG_POWER_SUPPLY
 300 extern int power_supply_is_system_supplied(void);
 301 #else
 302 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
 303 #endif
 304
 305 extern int power_supply_get_property(struct power_supply *psy,
 306                             enum power_supply_property psp,
 307                             union power_supply_propval *val);
 308 extern int power_supply_set_property(struct power_supply *psy,
 309                             enum power_supply_property psp,
 310                             const union power_supply_propval *val);
 311 extern int power_supply_property_is_writeable(struct power_supply *psy,
 312                                         enum power_supply_property psp);
 313 extern void power_supply_external_power_changed(struct power_supply *psy);
 314
 315 extern struct power_supply *__must_check
 316 power_supply_register(struct device *parent,
 317                                  const struct power_supply_desc *desc,
 318                                  const struct power_supply_config *cfg);
 319 extern struct power_supply *__must_check
 320 power_supply_register_no_ws(struct device *parent,
 321                                  const struct power_supply_desc *desc,
 322                                  const struct power_supply_config *cfg);
 323 extern struct power_supply *__must_check
 324 devm_power_supply_register(struct device *parent,
 325                                  const struct power_supply_desc *desc,
 326                                  const struct power_supply_config *cfg);
 327 extern struct power_supply *__must_check
 328 devm_power_supply_register_no_ws(struct device *parent,
 329                                  const struct power_supply_desc *desc,
 330                                  const struct power_supply_config *cfg);
 331 extern void power_supply_unregister(struct power_supply *psy);
 332 extern int power_supply_powers(struct power_supply *psy, struct device *dev);
 333
 334 extern void *power_supply_get_drvdata(struct power_supply *psy);
 335 /* For APM emulation, think legacy userspace. */
 336 extern struct class *power_supply_class;
 337
 338 static inline bool power_supply_is_amp_property(enum power_supply_property psp)
 339 {
 340         switch (psp) {
 341         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 342         case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
 343         case POWER_SUPPLY_PROP_CHARGE_FULL:
 344         case POWER_SUPPLY_PROP_CHARGE_EMPTY:
 345         case POWER_SUPPLY_PROP_CHARGE_NOW:
 346         case POWER_SUPPLY_PROP_CHARGE_AVG:
 347         case POWER_SUPPLY_PROP_CHARGE_COUNTER:
 348         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 349         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
 350         case POWER_SUPPLY_PROP_CURRENT_MAX:
 351         case POWER_SUPPLY_PROP_CURRENT_NOW:
 352         case POWER_SUPPLY_PROP_CURRENT_AVG:
 353         case POWER_SUPPLY_PROP_CURRENT_BOOT:
 354                 return 1;
 355         default:
 356                 break;
 357         }
 358
 359         return 0;
 360 }
 361
 362 static inline bool power_supply_is_watt_property(enum power_supply_property psp)
 363 {
 364         switch (psp) {
 365         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
 366         case POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN:
 367         case POWER_SUPPLY_PROP_ENERGY_FULL:
 368         case POWER_SUPPLY_PROP_ENERGY_EMPTY:
 369         case POWER_SUPPLY_PROP_ENERGY_NOW:
 370         case POWER_SUPPLY_PROP_ENERGY_AVG:
 371         case POWER_SUPPLY_PROP_VOLTAGE_MAX:
 372         case POWER_SUPPLY_PROP_VOLTAGE_MIN:
 373         case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
 374         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
 375         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 376         case POWER_SUPPLY_PROP_VOLTAGE_AVG:
 377         case POWER_SUPPLY_PROP_VOLTAGE_OCV:
 378         case POWER_SUPPLY_PROP_VOLTAGE_BOOT:
 379         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 380         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
 381         case POWER_SUPPLY_PROP_POWER_NOW:
 382                 return 1;
 383         default:
 384                 break;
 385         }
 386
 387         return 0;
 388 }
 389
 390 #endif /* __LINUX_POWER_SUPPLY_H__ */