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 POWER_SUPPLY_TYPE_USB_TYPE_C, /* Type C Port */ 167 POWER_SUPPLY_TYPE_USB_PD, /* Power Delivery Port */ 168 POWER_SUPPLY_TYPE_USB_PD_DRP, /* PD Dual Role Port */ 169 }; 170 171 enum power_supply_notifier_events { 172 PSY_EVENT_PROP_CHANGED, 173 }; 174 175 union power_supply_propval { 176 int intval; 177 const char *strval; 178 }; 179 180 struct device_node; 181 struct power_supply; 182 183 /* Run-time specific power supply configuration */ 184 struct power_supply_config { 185 struct device_node *of_node; 186 /* Driver private data */ 187 void *drv_data; 188 189 char **supplied_to; 190 size_t num_supplicants; 191 }; 192 193 /* Description of power supply */ 194 struct power_supply_desc { 195 const char *name; 196 enum power_supply_type type; 197 enum power_supply_property *properties; 198 size_t num_properties; 199 200 /* 201 * Functions for drivers implementing power supply class. 202 * These shouldn't be called directly by other drivers for accessing 203 * this power supply. Instead use power_supply_*() functions (for 204 * example power_supply_get_property()). 205 */ 206 int (*get_property)(struct power_supply *psy, 207 enum power_supply_property psp, 208 union power_supply_propval *val); 209 int (*set_property)(struct power_supply *psy, 210 enum power_supply_property psp, 211 const union power_supply_propval *val); 212 /* 213 * property_is_writeable() will be called during registration 214 * of power supply. If this happens during device probe then it must 215 * not access internal data of device (because probe did not end). 216 */ 217 int (*property_is_writeable)(struct power_supply *psy, 218 enum power_supply_property psp); 219 void (*external_power_changed)(struct power_supply *psy); 220 void (*set_charged)(struct power_supply *psy); 221 222 /* 223 * Set if thermal zone should not be created for this power supply. 224 * For example for virtual supplies forwarding calls to actual 225 * sensors or other supplies. 226 */ 227 bool no_thermal; 228 /* For APM emulation, think legacy userspace. */ 229 int use_for_apm; 230 }; 231 232 struct power_supply { 233 const struct power_supply_desc *desc; 234 235 char **supplied_to; 236 size_t num_supplicants; 237 238 char **supplied_from; 239 size_t num_supplies; 240 struct device_node *of_node; 241 242 /* Driver private data */ 243 void *drv_data; 244 245 /* private */ 246 struct device dev; 247 struct work_struct changed_work; 248 struct delayed_work deferred_register_work; 249 spinlock_t changed_lock; 250 bool changed; 251 bool initialized; 252 atomic_t use_cnt; 253 #ifdef CONFIG_THERMAL 254 struct thermal_zone_device *tzd; 255 struct thermal_cooling_device *tcd; 256 #endif 257 258 #ifdef CONFIG_LEDS_TRIGGERS 259 struct led_trigger *charging_full_trig; 260 char *charging_full_trig_name; 261 struct led_trigger *charging_trig; 262 char *charging_trig_name; 263 struct led_trigger *full_trig; 264 char *full_trig_name; 265 struct led_trigger *online_trig; 266 char *online_trig_name; 267 struct led_trigger *charging_blink_full_solid_trig; 268 char *charging_blink_full_solid_trig_name; 269 #endif 270 }; 271 272 /* 273 * This is recommended structure to specify static power supply parameters. 274 * Generic one, parametrizable for different power supplies. Power supply 275 * class itself does not use it, but that's what implementing most platform 276 * drivers, should try reuse for consistency. 277 */ 278 279 struct power_supply_info { 280 const char *name; 281 int technology; 282 int voltage_max_design; 283 int voltage_min_design; 284 int charge_full_design; 285 int charge_empty_design; 286 int energy_full_design; 287 int energy_empty_design; 288 int use_for_apm; 289 }; 290 291 extern struct atomic_notifier_head power_supply_notifier; 292 extern int power_supply_reg_notifier(struct notifier_block *nb); 293 extern void power_supply_unreg_notifier(struct notifier_block *nb); 294 extern struct power_supply *power_supply_get_by_name(const char *name); 295 extern void power_supply_put(struct power_supply *psy); 296 #ifdef CONFIG_OF 297 extern struct power_supply *power_supply_get_by_phandle(struct device_node *np, 298 const char *property); 299 extern struct power_supply *devm_power_supply_get_by_phandle( 300 struct device *dev, const char *property); 301 #else /* !CONFIG_OF */ 302 static inline struct power_supply * 303 power_supply_get_by_phandle(struct device_node *np, const char *property) 304 { return NULL; } 305 static inline struct power_supply * 306 devm_power_supply_get_by_phandle(struct device *dev, const char *property) 307 { return NULL; } 308 #endif /* CONFIG_OF */ 309 extern void power_supply_changed(struct power_supply *psy); 310 extern int power_supply_am_i_supplied(struct power_supply *psy); 311 extern int power_supply_set_battery_charged(struct power_supply *psy); 312 313 #ifdef CONFIG_POWER_SUPPLY 314 extern int power_supply_is_system_supplied(void); 315 #else 316 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; } 317 #endif 318 319 extern int power_supply_get_property(struct power_supply *psy, 320 enum power_supply_property psp, 321 union power_supply_propval *val); 322 extern int power_supply_set_property(struct power_supply *psy, 323 enum power_supply_property psp, 324 const union power_supply_propval *val); 325 extern int power_supply_property_is_writeable(struct power_supply *psy, 326 enum power_supply_property psp); 327 extern void power_supply_external_power_changed(struct power_supply *psy); 328 329 extern struct power_supply *__must_check 330 power_supply_register(struct device *parent, 331 const struct power_supply_desc *desc, 332 const struct power_supply_config *cfg); 333 extern struct power_supply *__must_check 334 power_supply_register_no_ws(struct device *parent, 335 const struct power_supply_desc *desc, 336 const struct power_supply_config *cfg); 337 extern struct power_supply *__must_check 338 devm_power_supply_register(struct device *parent, 339 const struct power_supply_desc *desc, 340 const struct power_supply_config *cfg); 341 extern struct power_supply *__must_check 342 devm_power_supply_register_no_ws(struct device *parent, 343 const struct power_supply_desc *desc, 344 const struct power_supply_config *cfg); 345 extern void power_supply_unregister(struct power_supply *psy); 346 extern int power_supply_powers(struct power_supply *psy, struct device *dev); 347 348 extern void *power_supply_get_drvdata(struct power_supply *psy); 349 /* For APM emulation, think legacy userspace. */ 350 extern struct class *power_supply_class; 351 352 static inline bool power_supply_is_amp_property(enum power_supply_property psp) 353 { 354 switch (psp) { 355 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: 356 case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN: 357 case POWER_SUPPLY_PROP_CHARGE_FULL: 358 case POWER_SUPPLY_PROP_CHARGE_EMPTY: 359 case POWER_SUPPLY_PROP_CHARGE_NOW: 360 case POWER_SUPPLY_PROP_CHARGE_AVG: 361 case POWER_SUPPLY_PROP_CHARGE_COUNTER: 362 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: 363 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: 364 case POWER_SUPPLY_PROP_CURRENT_MAX: 365 case POWER_SUPPLY_PROP_CURRENT_NOW: 366 case POWER_SUPPLY_PROP_CURRENT_AVG: 367 case POWER_SUPPLY_PROP_CURRENT_BOOT: 368 return 1; 369 default: 370 break; 371 } 372 373 return 0; 374 } 375 376 static inline bool power_supply_is_watt_property(enum power_supply_property psp) 377 { 378 switch (psp) { 379 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: 380 case POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN: 381 case POWER_SUPPLY_PROP_ENERGY_FULL: 382 case POWER_SUPPLY_PROP_ENERGY_EMPTY: 383 case POWER_SUPPLY_PROP_ENERGY_NOW: 384 case POWER_SUPPLY_PROP_ENERGY_AVG: 385 case POWER_SUPPLY_PROP_VOLTAGE_MAX: 386 case POWER_SUPPLY_PROP_VOLTAGE_MIN: 387 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: 388 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: 389 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 390 case POWER_SUPPLY_PROP_VOLTAGE_AVG: 391 case POWER_SUPPLY_PROP_VOLTAGE_OCV: 392 case POWER_SUPPLY_PROP_VOLTAGE_BOOT: 393 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: 394 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: 395 case POWER_SUPPLY_PROP_POWER_NOW: 396 return 1; 397 default: 398 break; 399 } 400 401 return 0; 402 } 403 404 #endif /* __LINUX_POWER_SUPPLY_H__ */ 405