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 #include <linux/spinlock.h>
  19 #include <linux/notifier.h>
  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_VOLTAGE_BOOT,
 104         POWER_SUPPLY_PROP_CURRENT_MAX,
 105         POWER_SUPPLY_PROP_CURRENT_NOW,
 106         POWER_SUPPLY_PROP_CURRENT_AVG,
 107         POWER_SUPPLY_PROP_CURRENT_BOOT,
 108         POWER_SUPPLY_PROP_POWER_NOW,
 109         POWER_SUPPLY_PROP_POWER_AVG,
 110         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 111         POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
 112         POWER_SUPPLY_PROP_CHARGE_FULL,
 113         POWER_SUPPLY_PROP_CHARGE_EMPTY,
 114         POWER_SUPPLY_PROP_CHARGE_NOW,
 115         POWER_SUPPLY_PROP_CHARGE_AVG,
 116         POWER_SUPPLY_PROP_CHARGE_COUNTER,
 117         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
 118         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
 119         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
 120         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
 121         POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
 122         POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
 123         POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
 124         POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
 125         POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN,
 126         POWER_SUPPLY_PROP_ENERGY_FULL,
 127         POWER_SUPPLY_PROP_ENERGY_EMPTY,
 128         POWER_SUPPLY_PROP_ENERGY_NOW,
 129         POWER_SUPPLY_PROP_ENERGY_AVG,
 130         POWER_SUPPLY_PROP_CAPACITY, /* in percents! */
 131         POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN, /* in percents! */
 132         POWER_SUPPLY_PROP_CAPACITY_ALERT_MAX, /* in percents! */
 133         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 134         POWER_SUPPLY_PROP_TEMP,
 135         POWER_SUPPLY_PROP_TEMP_MAX,
 136         POWER_SUPPLY_PROP_TEMP_MIN,
 137         POWER_SUPPLY_PROP_TEMP_ALERT_MIN,
 138         POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
 139         POWER_SUPPLY_PROP_TEMP_AMBIENT,
 140         POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MIN,
 141         POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MAX,
 142         POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 143         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 144         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 145         POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
 146         POWER_SUPPLY_PROP_TYPE, /* use power_supply.type instead */
 147         POWER_SUPPLY_PROP_SCOPE,
 148         POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
 149         POWER_SUPPLY_PROP_CALIBRATE,
 150         /* Properties of type `const char *' */
 151         POWER_SUPPLY_PROP_MODEL_NAME,
 152         POWER_SUPPLY_PROP_MANUFACTURER,
 153         POWER_SUPPLY_PROP_SERIAL_NUMBER,
 154 };
 155
 156 enum power_supply_type {
 157         POWER_SUPPLY_TYPE_UNKNOWN = 0,
 158         POWER_SUPPLY_TYPE_BATTERY,
 159         POWER_SUPPLY_TYPE_UPS,
 160         POWER_SUPPLY_TYPE_MAINS,
 161         POWER_SUPPLY_TYPE_USB,          /* Standard Downstream Port */
 162         POWER_SUPPLY_TYPE_USB_DCP,      /* Dedicated Charging Port */
 163         POWER_SUPPLY_TYPE_USB_CDP,      /* Charging Downstream Port */
 164         POWER_SUPPLY_TYPE_USB_ACA,      /* Accessory Charger Adapters */
 165 };
 166
 167 enum power_supply_notifier_events {
 168         PSY_EVENT_PROP_CHANGED,
 169 };
 170
 171 union power_supply_propval {
 172         int intval;
 173         const char *strval;
 174 };
 175
 176 struct device;
 177 struct device_node;
 178
 179 struct power_supply {
 180         const char *name;
 181         enum power_supply_type type;
 182         enum power_supply_property *properties;
 183         size_t num_properties;
 184
 185         char **supplied_to;
 186         size_t num_supplicants;
 187
 188         char **supplied_from;
 189         size_t num_supplies;
 190         struct device_node *of_node;
 191
 192         int (*get_property)(struct power_supply *psy,
 193                             enum power_supply_property psp,
 194                             union power_supply_propval *val);
 195         int (*set_property)(struct power_supply *psy,
 196                             enum power_supply_property psp,
 197                             const union power_supply_propval *val);
 198         int (*property_is_writeable)(struct power_supply *psy,
 199                                      enum power_supply_property psp);
 200         void (*external_power_changed)(struct power_supply *psy);
 201         void (*set_charged)(struct power_supply *psy);
 202
 203         /*
 204          * Set if thermal zone should not be created for this power supply.
 205          * For example for virtual supplies forwarding calls to actual
 206          * sensors or other supplies.
 207          */
 208         bool no_thermal;
 209         /* For APM emulation, think legacy userspace. */
 210         int use_for_apm;
 211
 212         /* private */
 213         struct device *dev;
 214         struct work_struct changed_work;
 215         spinlock_t changed_lock;
 216         bool changed;
 217 #ifdef CONFIG_THERMAL
 218         struct thermal_zone_device *tzd;
 219         struct thermal_cooling_device *tcd;
 220 #endif
 221
 222 #ifdef CONFIG_LEDS_TRIGGERS
 223         struct led_trigger *charging_full_trig;
 224         char *charging_full_trig_name;
 225         struct led_trigger *charging_trig;
 226         char *charging_trig_name;
 227         struct led_trigger *full_trig;
 228         char *full_trig_name;
 229         struct led_trigger *online_trig;
 230         char *online_trig_name;
 231         struct led_trigger *charging_blink_full_solid_trig;
 232         char *charging_blink_full_solid_trig_name;
 233 #endif
 234 };
 235
 236 /*
 237  * This is recommended structure to specify static power supply parameters.
 238  * Generic one, parametrizable for different power supplies. Power supply
 239  * class itself does not use it, but that's what implementing most platform
 240  * drivers, should try reuse for consistency.
 241  */
 242
 243 struct power_supply_info {
 244         const char *name;
 245         int technology;
 246         int voltage_max_design;
 247         int voltage_min_design;
 248         int charge_full_design;
 249         int charge_empty_design;
 250         int energy_full_design;
 251         int energy_empty_design;
 252         int use_for_apm;
 253 };
 254
 255 extern struct atomic_notifier_head power_supply_notifier;
 256 extern int power_supply_reg_notifier(struct notifier_block *nb);
 257 extern void power_supply_unreg_notifier(struct notifier_block *nb);
 258 extern struct power_supply *power_supply_get_by_name(const char *name);
 259 #ifdef CONFIG_OF
 260 extern struct power_supply *power_supply_get_by_phandle(struct device_node *np,
 261                                                         const char *property);
 262 #else /* !CONFIG_OF */
 263 static inline struct power_supply *
 264 power_supply_get_by_phandle(struct device_node *np, const char *property)
 265 { return NULL; }
 266 #endif /* CONFIG_OF */
 267 extern void power_supply_changed(struct power_supply *psy);
 268 extern int power_supply_am_i_supplied(struct power_supply *psy);
 269 extern int power_supply_set_battery_charged(struct power_supply *psy);
 270
 271 #ifdef CONFIG_POWER_SUPPLY
 272 extern int power_supply_is_system_supplied(void);
 273 #else
 274 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
 275 #endif
 276
 277 extern int power_supply_register(struct device *parent,
 278                                  struct power_supply *psy);
 279 extern int power_supply_register_no_ws(struct device *parent,
 280                                  struct power_supply *psy);
 281 extern void power_supply_unregister(struct power_supply *psy);
 282 extern int power_supply_powers(struct power_supply *psy, struct device *dev);
 283
 284 /* For APM emulation, think legacy userspace. */
 285 extern struct class *power_supply_class;
 286
 287 static inline bool power_supply_is_amp_property(enum power_supply_property psp)
 288 {
 289         switch (psp) {
 290         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 291         case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
 292         case POWER_SUPPLY_PROP_CHARGE_FULL:
 293         case POWER_SUPPLY_PROP_CHARGE_EMPTY:
 294         case POWER_SUPPLY_PROP_CHARGE_NOW:
 295         case POWER_SUPPLY_PROP_CHARGE_AVG:
 296         case POWER_SUPPLY_PROP_CHARGE_COUNTER:
 297         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 298         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
 299         case POWER_SUPPLY_PROP_CURRENT_MAX:
 300         case POWER_SUPPLY_PROP_CURRENT_NOW:
 301         case POWER_SUPPLY_PROP_CURRENT_AVG:
 302         case POWER_SUPPLY_PROP_CURRENT_BOOT:
 303                 return 1;
 304         default:
 305                 break;
 306         }
 307
 308         return 0;
 309 }
 310
 311 static inline bool power_supply_is_watt_property(enum power_supply_property psp)
 312 {
 313         switch (psp) {
 314         case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
 315         case POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN:
 316         case POWER_SUPPLY_PROP_ENERGY_FULL:
 317         case POWER_SUPPLY_PROP_ENERGY_EMPTY:
 318         case POWER_SUPPLY_PROP_ENERGY_NOW:
 319         case POWER_SUPPLY_PROP_ENERGY_AVG:
 320         case POWER_SUPPLY_PROP_VOLTAGE_MAX:
 321         case POWER_SUPPLY_PROP_VOLTAGE_MIN:
 322         case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
 323         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
 324         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 325         case POWER_SUPPLY_PROP_VOLTAGE_AVG:
 326         case POWER_SUPPLY_PROP_VOLTAGE_OCV:
 327         case POWER_SUPPLY_PROP_VOLTAGE_BOOT:
 328         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 329         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
 330         case POWER_SUPPLY_PROP_POWER_NOW:
 331                 return 1;
 332         default:
 333                 break;
 334         }
 335
 336         return 0;
 337 }
 338
 339 #endif /* __LINUX_POWER_SUPPLY_H__ */