LXR linux/include/linux/power

   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
  35enum {
  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
  43enum {
  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
  50enum {
  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
  62enum {
  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
  72enum {
  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
  81enum {
  82        POWER_SUPPLY_SCOPE_UNKNOWN = 0,
  83        POWER_SUPPLY_SCOPE_SYSTEM,
  84        POWER_SUPPLY_SCOPE_DEVICE,
  85};
  86
  87enum 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
 157enum 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
 168enum power_supply_notifier_events {
 169        PSY_EVENT_PROP_CHANGED,
 170};
 171
 172union power_supply_propval {
 173        int intval;
 174        const char *strval;
 175};
 176
 177struct device_node;
 178struct power_supply;
 179
 180/* Run-time specific power supply configuration */
 181struct 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 */
 191struct 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        /*
 210         * property_is_writeable() will be called during registration
 211         * of power supply. If this happens during device probe then it must
 212         * not access internal data of device (because probe did not end).
 213         */
 214        int (*property_is_writeable)(struct power_supply *psy,
 215                                     enum power_supply_property psp);
 216        void (*external_power_changed)(struct power_supply *psy);
 217        void (*set_charged)(struct power_supply *psy);
 218
 219        /*
 220         * Set if thermal zone should not be created for this power supply.
 221         * For example for virtual supplies forwarding calls to actual
 222         * sensors or other supplies.
 223         */
 224        bool no_thermal;
 225        /* For APM emulation, think legacy userspace. */
 226        int use_for_apm;
 227};
 228
 229struct power_supply {
 230        const struct power_supply_desc *desc;
 231
 232        char **supplied_to;
 233        size_t num_supplicants;
 234
 235        char **supplied_from;
 236        size_t num_supplies;
 237        struct device_node *of_node;
 238
 239        /* Driver private data */
 240        void *drv_data;
 241
 242        /* private */
 243        struct device dev;
 244        struct work_struct changed_work;
 245        struct delayed_work deferred_register_work;
 246        spinlock_t changed_lock;
 247        bool changed;
 248        atomic_t use_cnt;
 249#ifdef CONFIG_THERMAL
 250        struct thermal_zone_device *tzd;
 251        struct thermal_cooling_device *tcd;
 252#endif
 253
 254#ifdef CONFIG_LEDS_TRIGGERS
 255        struct led_trigger *charging_full_trig;
 256        char *charging_full_trig_name;
 257        struct led_trigger *charging_trig;
 258        char *charging_trig_name;
 259        struct led_trigger *full_trig;
 260        char *full_trig_name;
 261        struct led_trigger *online_trig;
 262        char *online_trig_name;
 263        struct led_trigger *charging_blink_full_solid_trig;
 264        char *charging_blink_full_solid_trig_name;
 265#endif
 266};
 267
 268/*
 269 * This is recommended structure to specify static power supply parameters.
 270 * Generic one, parametrizable for different power supplies. Power supply
 271 * class itself does not use it, but that's what implementing most platform
 272 * drivers, should try reuse for consistency.
 273 */
 274
 275struct power_supply_info {
 276        const char *name;
 277        int technology;
 278        int voltage_max_design;
 279        int voltage_min_design;
 280        int charge_full_design;
 281        int charge_empty_design;
 282        int energy_full_design;
 283        int energy_empty_design;
 284        int use_for_apm;
 285};
 286
 287extern struct atomic_notifier_head power_supply_notifier;
 288extern int power_supply_reg_notifier(struct notifier_block *nb);
 289extern void power_supply_unreg_notifier(struct notifier_block *nb);
 290extern struct power_supply *power_supply_get_by_name(const char *name);
 291extern void power_supply_put(struct power_supply *psy);
 292#ifdef CONFIG_OF
 293extern struct power_supply *power_supply_get_by_phandle(struct device_node *np,
 294                                                        const char *property);
 295extern struct power_supply *devm_power_supply_get_by_phandle(
 296                                    struct device *dev, const char *property);
 297#else /* !CONFIG_OF */
 298static inline struct power_supply *
 299power_supply_get_by_phandle(struct device_node *np, const char *property)
 300{ return NULL; }
 301static inline struct power_supply *
 302devm_power_supply_get_by_phandle(struct device *dev, const char *property)
 303{ return NULL; }
 304#endif /* CONFIG_OF */
 305extern void power_supply_changed(struct power_supply *psy);
 306extern int power_supply_am_i_supplied(struct power_supply *psy);
 307extern int power_supply_set_battery_charged(struct power_supply *psy);
 308
 309#ifdef CONFIG_POWER_SUPPLY
 310extern int power_supply_is_system_supplied(void);
 311#else
 312static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
 313#endif
 314
 315extern int power_supply_get_property(struct power_supply *psy,
 316                            enum power_supply_property psp,
 317                            union power_supply_propval *val);
 318extern int power_supply_set_property(struct power_supply *psy,
 319                            enum power_supply_property psp,
 320                            const union power_supply_propval *val);
 321extern int power_supply_property_is_writeable(struct power_supply *psy,
 322                                        enum power_supply_property psp);
 323extern void power_supply_external_power_changed(struct power_supply *psy);
 324
 325extern struct power_supply *__must_check
 326power_supply_register(struct device *parent,
 327                                 const struct power_supply_desc *desc,
 328                                 const struct power_supply_config *cfg);
 329extern struct power_supply *__must_check
 330power_supply_register_no_ws(struct device *parent,
 331                                 const struct power_supply_desc *desc,
 332                                 const struct power_supply_config *cfg);
 333extern struct power_supply *__must_check
 334devm_power_supply_register(struct device *parent,
 335                                 const struct power_supply_desc *desc,
 336                                 const struct power_supply_config *cfg);
 337extern struct power_supply *__must_check
 338devm_power_supply_register_no_ws(struct device *parent,
 339                                 const struct power_supply_desc *desc,
 340                                 const struct power_supply_config *cfg);
 341extern void power_supply_unregister(struct power_supply *psy);
 342extern int power_supply_powers(struct power_supply *psy, struct device *dev);
 343
 344extern void *power_supply_get_drvdata(struct power_supply *psy);
 345/* For APM emulation, think legacy userspace. */
 346extern struct class *power_supply_class;
 347
 348static inline bool power_supply_is_amp_property(enum power_supply_property psp)
 349{
 350        switch (psp) {
 351        case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 352        case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
 353        case POWER_SUPPLY_PROP_CHARGE_FULL:
 354        case POWER_SUPPLY_PROP_CHARGE_EMPTY:
 355        case POWER_SUPPLY_PROP_CHARGE_NOW:
 356        case POWER_SUPPLY_PROP_CHARGE_AVG:
 357        case POWER_SUPPLY_PROP_CHARGE_COUNTER:
 358        case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 359        case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
 360        case POWER_SUPPLY_PROP_CURRENT_MAX:
 361        case POWER_SUPPLY_PROP_CURRENT_NOW:
 362        case POWER_SUPPLY_PROP_CURRENT_AVG:
 363        case POWER_SUPPLY_PROP_CURRENT_BOOT:
 364                return 1;
 365        default:
 366                break;
 367        }
 368
 369        return 0;
 370}
 371
 372static inline bool power_supply_is_watt_property(enum power_supply_property psp)
 373{
 374        switch (psp) {
 375        case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
 376        case POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN:
 377        case POWER_SUPPLY_PROP_ENERGY_FULL:
 378        case POWER_SUPPLY_PROP_ENERGY_EMPTY:
 379        case POWER_SUPPLY_PROP_ENERGY_NOW:
 380        case POWER_SUPPLY_PROP_ENERGY_AVG:
 381        case POWER_SUPPLY_PROP_VOLTAGE_MAX:
 382        case POWER_SUPPLY_PROP_VOLTAGE_MIN:
 383        case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
 384        case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
 385        case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 386        case POWER_SUPPLY_PROP_VOLTAGE_AVG:
 387        case POWER_SUPPLY_PROP_VOLTAGE_OCV:
 388        case POWER_SUPPLY_PROP_VOLTAGE_BOOT:
 389        case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 390        case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
 391        case POWER_SUPPLY_PROP_POWER_NOW:
 392                return 1;
 393        default:
 394                break;
 395        }
 396
 397        return 0;
 398}
 399
 400#endif /* __LINUX_POWER_SUPPLY_H__ */
 401