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_USB_TYPE,
 149         POWER_SUPPLY_PROP_SCOPE,
 150         POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
 151         POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
 152         POWER_SUPPLY_PROP_CALIBRATE,
 153         /* Properties of type `const char *' */
 154         POWER_SUPPLY_PROP_MODEL_NAME,
 155         POWER_SUPPLY_PROP_MANUFACTURER,
 156         POWER_SUPPLY_PROP_SERIAL_NUMBER,
 157 };
 158
 159 enum power_supply_type {
 160         POWER_SUPPLY_TYPE_UNKNOWN = 0,
 161         POWER_SUPPLY_TYPE_BATTERY,
 162         POWER_SUPPLY_TYPE_UPS,
 163         POWER_SUPPLY_TYPE_MAINS,
 164         POWER_SUPPLY_TYPE_USB,                  /* Standard Downstream Port */
 165         POWER_SUPPLY_TYPE_USB_DCP,              /* Dedicated Charging Port */
 166         POWER_SUPPLY_TYPE_USB_CDP,              /* Charging Downstream Port */
 167         POWER_SUPPLY_TYPE_USB_ACA,              /* Accessory Charger Adapters */
 168         POWER_SUPPLY_TYPE_USB_TYPE_C,           /* Type C Port */
 169         POWER_SUPPLY_TYPE_USB_PD,               /* Power Delivery Port */
 170         POWER_SUPPLY_TYPE_USB_PD_DRP,           /* PD Dual Role Port */
 171         POWER_SUPPLY_TYPE_APPLE_BRICK_ID,       /* Apple Charging Method */
 172 };
 173
 174 enum power_supply_usb_type {
 175         POWER_SUPPLY_USB_TYPE_UNKNOWN = 0,
 176         POWER_SUPPLY_USB_TYPE_SDP,              /* Standard Downstream Port */
 177         POWER_SUPPLY_USB_TYPE_DCP,              /* Dedicated Charging Port */
 178         POWER_SUPPLY_USB_TYPE_CDP,              /* Charging Downstream Port */
 179         POWER_SUPPLY_USB_TYPE_ACA,              /* Accessory Charger Adapters */
 180         POWER_SUPPLY_USB_TYPE_C,                /* Type C Port */
 181         POWER_SUPPLY_USB_TYPE_PD,               /* Power Delivery Port */
 182         POWER_SUPPLY_USB_TYPE_PD_DRP,           /* PD Dual Role Port */
 183         POWER_SUPPLY_USB_TYPE_PD_PPS,           /* PD Programmable Power Supply */
 184         POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID,   /* Apple Charging Method */
 185 };
 186
 187 enum power_supply_notifier_events {
 188         PSY_EVENT_PROP_CHANGED,
 189 };
 190
 191 union power_supply_propval {
 192         int intval;
 193         const char *strval;
 194 };
 195
 196 struct device_node;
 197 struct power_supply;
 198
 199 /* Run-time specific power supply configuration */
 200 struct power_supply_config {
 201         struct device_node *of_node;
 202         struct fwnode_handle *fwnode;
 203
 204         /* Driver private data */
 205         void *drv_data;
 206
 207         char **supplied_to;
 208         size_t num_supplicants;
 209 };
 210
 211 /* Description of power supply */
 212 struct power_supply_desc {
 213         const char *name;
 214         enum power_supply_type type;
 215         enum power_supply_usb_type *usb_types;
 216         size_t num_usb_types;
 217         enum power_supply_property *properties;
 218         size_t num_properties;
 219
 220         /*
 221          * Functions for drivers implementing power supply class.
 222          * These shouldn't be called directly by other drivers for accessing
 223          * this power supply. Instead use power_supply_*() functions (for
 224          * example power_supply_get_property()).
 225          */
 226         int (*get_property)(struct power_supply *psy,
 227                             enum power_supply_property psp,
 228                             union power_supply_propval *val);
 229         int (*set_property)(struct power_supply *psy,
 230                             enum power_supply_property psp,
 231                             const union power_supply_propval *val);
 232         /*
 233          * property_is_writeable() will be called during registration
 234          * of power supply. If this happens during device probe then it must
 235          * not access internal data of device (because probe did not end).
 236          */
 237         int (*property_is_writeable)(struct power_supply *psy,
 238                                      enum power_supply_property psp);
 239         void (*external_power_changed)(struct power_supply *psy);
 240         void (*set_charged)(struct power_supply *psy);
 241
 242         /*
 243          * Set if thermal zone should not be created for this power supply.
 244          * For example for virtual supplies forwarding calls to actual
 245          * sensors or other supplies.
 246          */
 247         bool no_thermal;
 248         /* For APM emulation, think legacy userspace. */
 249         int use_for_apm;
 250 };
 251
 252 struct power_supply {
 253         const struct power_supply_desc *desc;
 254
 255         char **supplied_to;
 256         size_t num_supplicants;
 257
 258         char **supplied_from;
 259         size_t num_supplies;
 260         struct device_node *of_node;
 261
 262         /* Driver private data */
 263         void *drv_data;
 264
 265         /* private */
 266         struct device dev;
 267         struct work_struct changed_work;
 268         struct delayed_work deferred_register_work;
 269         spinlock_t changed_lock;
 270         bool changed;
 271         bool initialized;
 272         atomic_t use_cnt;
 273 #ifdef CONFIG_THERMAL
 274         struct thermal_zone_device *tzd;
 275         struct thermal_cooling_device *tcd;
 276 #endif
 277
 278 #ifdef CONFIG_LEDS_TRIGGERS
 279         struct led_trigger *charging_full_trig;
 280         char *charging_full_trig_name;
 281         struct led_trigger *charging_trig;
 282         char *charging_trig_name;
 283         struct led_trigger *full_trig;
 284         char *full_trig_name;
 285         struct led_trigger *online_trig;
 286         char *online_trig_name;
 287         struct led_trigger *charging_blink_full_solid_trig;
 288         char *charging_blink_full_solid_trig_name;
 289 #endif
 290 };
 291
 292 /*
 293  * This is recommended structure to specify static power supply parameters.
 294  * Generic one, parametrizable for different power supplies. Power supply
 295  * class itself does not use it, but that's what implementing most platform
 296  * drivers, should try reuse for consistency.
 297  */
 298
 299 struct power_supply_info {
 300         const char *name;
 301         int technology;
 302         int voltage_max_design;
 303         int voltage_min_design;
 304         int charge_full_design;
 305         int charge_empty_design;
 306         int energy_full_design;
 307         int energy_empty_design;
 308         int use_for_apm;
 309 };
 310
 311 /*
 312  * This is the recommended struct to manage static battery parameters,
 313  * populated by power_supply_get_battery_info(). Most platform drivers should
 314  * use these for consistency.
 315  * Its field names must correspond to elements in enum power_supply_property.
 316  * The default field value is -EINVAL.
 317  * Power supply class itself doesn't use this.
 318  */
 319
 320 struct power_supply_battery_info {
 321         int energy_full_design_uwh;         /* microWatt-hours */
 322         int charge_full_design_uah;         /* microAmp-hours */
 323         int voltage_min_design_uv;          /* microVolts */
 324         int precharge_current_ua;           /* microAmps */
 325         int charge_term_current_ua;         /* microAmps */
 326         int constant_charge_current_max_ua; /* microAmps */
 327         int constant_charge_voltage_max_uv; /* microVolts */
 328 };
 329
 330 extern struct atomic_notifier_head power_supply_notifier;
 331 extern int power_supply_reg_notifier(struct notifier_block *nb);
 332 extern void power_supply_unreg_notifier(struct notifier_block *nb);
 333 extern struct power_supply *power_supply_get_by_name(const char *name);
 334 extern void power_supply_put(struct power_supply *psy);
 335 #ifdef CONFIG_OF
 336 extern struct power_supply *power_supply_get_by_phandle(struct device_node *np,
 337                                                         const char *property);
 338 extern struct power_supply *devm_power_supply_get_by_phandle(
 339                                     struct device *dev, const char *property);
 340 #else /* !CONFIG_OF */
 341 static inline struct power_supply *
 342 power_supply_get_by_phandle(struct device_node *np, const char *property)
 343 { return NULL; }
 344 static inline struct power_supply *
 345 devm_power_supply_get_by_phandle(struct device *dev, const char *property)
 346 { return NULL; }
 347 #endif /* CONFIG_OF */
 348
 349 extern int power_supply_get_battery_info(struct power_supply *psy,
 350                                          struct power_supply_battery_info *info);
 351 extern void power_supply_changed(struct power_supply *psy);
 352 extern int power_supply_am_i_supplied(struct power_supply *psy);
 353 extern int power_supply_set_input_current_limit_from_supplier(
 354                                          struct power_supply *psy);
 355 extern int power_supply_set_battery_charged(struct power_supply *psy);
 356
 357 #ifdef CONFIG_POWER_SUPPLY
 358 extern int power_supply_is_system_supplied(void);
 359 #else
 360 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
 361 #endif
 362
 363 extern int power_supply_get_property(struct power_supply *psy,
 364                             enum power_supply_property psp,
 365                             union power_supply_propval *val);
 366 extern int power_supply_set_property(struct power_supply *psy,
 367                             enum power_supply_property psp,
 368                             const union power_supply_propval *val);
 369 extern int power_supply_property_is_writeable(struct power_supply *psy,
 370                                         enum power_supply_property psp);
 371 extern void power_supply_external_power_changed(struct power_supply *psy);
 372
 373 extern struct power_supply *__must_check
 374 power_supply_register(struct device *parent,
 375                                  const struct power_supply_desc *desc,
 376                                  const struct power_supply_config *cfg);
 377 extern struct power_supply *__must_check
 378 power_supply_register_no_ws(struct device *parent,
 379                                  const struct power_supply_desc *desc,
 380                                  const struct power_supply_config *cfg);
 381 extern struct power_supply *__must_check
 382 devm_power_supply_register(struct device *parent,
 383                                  const struct power_supply_desc *desc,
 384                                  const struct power_supply_config *cfg);
 385 extern struct power_supply *__must_check
 386 devm_power_supply_register_no_ws(struct device *parent,
 387                                  const struct power_supply_desc *desc,
 388                                  const struct power_supply_config *cfg);
 389 extern void power_supply_unregister(struct power_supply *psy);
 390 extern int power_supply_powers(struct power_supply *psy, struct device *dev);
 391
 392 #define to_power_supply(device) container_of(device, struct power_supply, dev)
 393
 394 extern void *power_supply_get_drvdata(struct power_supply *psy);
 395 /* For APM emulation, think legacy userspace. */
 396 extern struct class *power_supply_class;
 397
 398 static inline bool power_supply_is_amp_property(enum power_supply_property psp)
 399 {
 400         switch (psp) {
 401         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 402         case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
 403         case POWER_SUPPLY_PROP_CHARGE_FULL:
 404         case POWER_SUPPLY_PROP_CHARGE_EMPTY:
 405         case POWER_SUPPLY_PROP_CHARGE_NOW:
 406         case POWER_SUPPLY_PROP_CHARGE_AVG:
 407         case POWER_SUPPLY_PROP_CHARGE_COUNTER:
 408         case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
 409         case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
 410         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 411         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
 412         case POWER_SUPPLY_PROP_CURRENT_MAX:
 413         case POWER_SUPPLY_PROP_CURRENT_NOW:
 414         case POWER_SUPPLY_PROP_CURRENT_AVG:
 415         case POWER_SUPPLY_PROP_CURRENT_BOOT:
 416                 return 1;
 417         default:
 418                 break;
 419         }
 420
 421         return 0;
 422 }
 423
 424 static inline bool power_supply_is_watt_property(enum power_supply_property psp)
 425 {
 426         switch (psp) {
 427         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
 428         case POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN:
 429         case POWER_SUPPLY_PROP_ENERGY_FULL:
 430         case POWER_SUPPLY_PROP_ENERGY_EMPTY:
 431         case POWER_SUPPLY_PROP_ENERGY_NOW:
 432         case POWER_SUPPLY_PROP_ENERGY_AVG:
 433         case POWER_SUPPLY_PROP_VOLTAGE_MAX:
 434         case POWER_SUPPLY_PROP_VOLTAGE_MIN:
 435         case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
 436         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
 437         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 438         case POWER_SUPPLY_PROP_VOLTAGE_AVG:
 439         case POWER_SUPPLY_PROP_VOLTAGE_OCV:
 440         case POWER_SUPPLY_PROP_VOLTAGE_BOOT:
 441         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 442         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
 443         case POWER_SUPPLY_PROP_POWER_NOW:
 444                 return 1;
 445         default:
 446                 break;
 447         }
 448
 449         return 0;
 450 }
 451
 452 #endif /* __LINUX_POWER_SUPPLY_H__ */