1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Universal power supply monitor class 4 * 5 * Copyright © 2007 Anton Vorontsov <cbou@mail.ru> 6 * Copyright © 2004 Szabolcs Gyurko 7 * Copyright © 2003 Ian Molton <spyro@f2s.com> 8 * 9 * Modified: 2004, Oct Szabolcs Gyurko 10 */ 11 12 #ifndef __LINUX_POWER_SUPPLY_H__ 13 #define __LINUX_POWER_SUPPLY_H__ 14 15 #include <linux/device.h> 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 /* What algorithm is the charger using? */ 43 enum { 44 POWER_SUPPLY_CHARGE_TYPE_UNKNOWN = 0, 45 POWER_SUPPLY_CHARGE_TYPE_NONE, 46 POWER_SUPPLY_CHARGE_TYPE_TRICKLE, /* slow speed */ 47 POWER_SUPPLY_CHARGE_TYPE_FAST, /* fast speed */ 48 POWER_SUPPLY_CHARGE_TYPE_STANDARD, /* normal speed */ 49 POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE, /* dynamically adjusted speed */ 50 POWER_SUPPLY_CHARGE_TYPE_CUSTOM, /* use CHARGE_CONTROL_* props */ 51 }; 52 53 enum { 54 POWER_SUPPLY_HEALTH_UNKNOWN = 0, 55 POWER_SUPPLY_HEALTH_GOOD, 56 POWER_SUPPLY_HEALTH_OVERHEAT, 57 POWER_SUPPLY_HEALTH_DEAD, 58 POWER_SUPPLY_HEALTH_OVERVOLTAGE, 59 POWER_SUPPLY_HEALTH_UNSPEC_FAILURE, 60 POWER_SUPPLY_HEALTH_COLD, 61 POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE, 62 POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE, 63 POWER_SUPPLY_HEALTH_OVERCURRENT, 64 }; 65 66 enum { 67 POWER_SUPPLY_TECHNOLOGY_UNKNOWN = 0, 68 POWER_SUPPLY_TECHNOLOGY_NiMH, 69 POWER_SUPPLY_TECHNOLOGY_LION, 70 POWER_SUPPLY_TECHNOLOGY_LIPO, 71 POWER_SUPPLY_TECHNOLOGY_LiFe, 72 POWER_SUPPLY_TECHNOLOGY_NiCd, 73 POWER_SUPPLY_TECHNOLOGY_LiMn, 74 }; 75 76 enum { 77 POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN = 0, 78 POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL, 79 POWER_SUPPLY_CAPACITY_LEVEL_LOW, 80 POWER_SUPPLY_CAPACITY_LEVEL_NORMAL, 81 POWER_SUPPLY_CAPACITY_LEVEL_HIGH, 82 POWER_SUPPLY_CAPACITY_LEVEL_FULL, 83 }; 84 85 enum { 86 POWER_SUPPLY_SCOPE_UNKNOWN = 0, 87 POWER_SUPPLY_SCOPE_SYSTEM, 88 POWER_SUPPLY_SCOPE_DEVICE, 89 }; 90 91 enum power_supply_property { 92 /* Properties of type `int' */ 93 POWER_SUPPLY_PROP_STATUS = 0, 94 POWER_SUPPLY_PROP_CHARGE_TYPE, 95 POWER_SUPPLY_PROP_HEALTH, 96 POWER_SUPPLY_PROP_PRESENT, 97 POWER_SUPPLY_PROP_ONLINE, 98 POWER_SUPPLY_PROP_AUTHENTIC, 99 POWER_SUPPLY_PROP_TECHNOLOGY, 100 POWER_SUPPLY_PROP_CYCLE_COUNT, 101 POWER_SUPPLY_PROP_VOLTAGE_MAX, 102 POWER_SUPPLY_PROP_VOLTAGE_MIN, 103 POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 104 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 105 POWER_SUPPLY_PROP_VOLTAGE_NOW, 106 POWER_SUPPLY_PROP_VOLTAGE_AVG, 107 POWER_SUPPLY_PROP_VOLTAGE_OCV, 108 POWER_SUPPLY_PROP_VOLTAGE_BOOT, 109 POWER_SUPPLY_PROP_CURRENT_MAX, 110 POWER_SUPPLY_PROP_CURRENT_NOW, 111 POWER_SUPPLY_PROP_CURRENT_AVG, 112 POWER_SUPPLY_PROP_CURRENT_BOOT, 113 POWER_SUPPLY_PROP_POWER_NOW, 114 POWER_SUPPLY_PROP_POWER_AVG, 115 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 116 POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN, 117 POWER_SUPPLY_PROP_CHARGE_FULL, 118 POWER_SUPPLY_PROP_CHARGE_EMPTY, 119 POWER_SUPPLY_PROP_CHARGE_NOW, 120 POWER_SUPPLY_PROP_CHARGE_AVG, 121 POWER_SUPPLY_PROP_CHARGE_COUNTER, 122 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, 123 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, 124 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, 125 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, 126 POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, 127 POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX, 128 POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD, /* in percents! */ 129 POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD, /* in percents! */ 130 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, 131 POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT, 132 POWER_SUPPLY_PROP_INPUT_POWER_LIMIT, 133 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 134 POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN, 135 POWER_SUPPLY_PROP_ENERGY_FULL, 136 POWER_SUPPLY_PROP_ENERGY_EMPTY, 137 POWER_SUPPLY_PROP_ENERGY_NOW, 138 POWER_SUPPLY_PROP_ENERGY_AVG, 139 POWER_SUPPLY_PROP_CAPACITY, /* in percents! */ 140 POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN, /* in percents! */ 141 POWER_SUPPLY_PROP_CAPACITY_ALERT_MAX, /* in percents! */ 142 POWER_SUPPLY_PROP_CAPACITY_LEVEL, 143 POWER_SUPPLY_PROP_TEMP, 144 POWER_SUPPLY_PROP_TEMP_MAX, 145 POWER_SUPPLY_PROP_TEMP_MIN, 146 POWER_SUPPLY_PROP_TEMP_ALERT_MIN, 147 POWER_SUPPLY_PROP_TEMP_ALERT_MAX, 148 POWER_SUPPLY_PROP_TEMP_AMBIENT, 149 POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MIN, 150 POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MAX, 151 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, 152 POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, 153 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, 154 POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, 155 POWER_SUPPLY_PROP_TYPE, /* use power_supply.type instead */ 156 POWER_SUPPLY_PROP_USB_TYPE, 157 POWER_SUPPLY_PROP_SCOPE, 158 POWER_SUPPLY_PROP_PRECHARGE_CURRENT, 159 POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, 160 POWER_SUPPLY_PROP_CALIBRATE, 161 /* Properties of type `const char *' */ 162 POWER_SUPPLY_PROP_MODEL_NAME, 163 POWER_SUPPLY_PROP_MANUFACTURER, 164 POWER_SUPPLY_PROP_SERIAL_NUMBER, 165 }; 166 167 enum power_supply_type { 168 POWER_SUPPLY_TYPE_UNKNOWN = 0, 169 POWER_SUPPLY_TYPE_BATTERY, 170 POWER_SUPPLY_TYPE_UPS, 171 POWER_SUPPLY_TYPE_MAINS, 172 POWER_SUPPLY_TYPE_USB, /* Standard Downstream Port */ 173 POWER_SUPPLY_TYPE_USB_DCP, /* Dedicated Charging Port */ 174 POWER_SUPPLY_TYPE_USB_CDP, /* Charging Downstream Port */ 175 POWER_SUPPLY_TYPE_USB_ACA, /* Accessory Charger Adapters */ 176 POWER_SUPPLY_TYPE_USB_TYPE_C, /* Type C Port */ 177 POWER_SUPPLY_TYPE_USB_PD, /* Power Delivery Port */ 178 POWER_SUPPLY_TYPE_USB_PD_DRP, /* PD Dual Role Port */ 179 POWER_SUPPLY_TYPE_APPLE_BRICK_ID, /* Apple Charging Method */ 180 }; 181 182 enum power_supply_usb_type { 183 POWER_SUPPLY_USB_TYPE_UNKNOWN = 0, 184 POWER_SUPPLY_USB_TYPE_SDP, /* Standard Downstream Port */ 185 POWER_SUPPLY_USB_TYPE_DCP, /* Dedicated Charging Port */ 186 POWER_SUPPLY_USB_TYPE_CDP, /* Charging Downstream Port */ 187 POWER_SUPPLY_USB_TYPE_ACA, /* Accessory Charger Adapters */ 188 POWER_SUPPLY_USB_TYPE_C, /* Type C Port */ 189 POWER_SUPPLY_USB_TYPE_PD, /* Power Delivery Port */ 190 POWER_SUPPLY_USB_TYPE_PD_DRP, /* PD Dual Role Port */ 191 POWER_SUPPLY_USB_TYPE_PD_PPS, /* PD Programmable Power Supply */ 192 POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID, /* Apple Charging Method */ 193 }; 194 195 enum power_supply_notifier_events { 196 PSY_EVENT_PROP_CHANGED, 197 }; 198 199 union power_supply_propval { 200 int intval; 201 const char *strval; 202 }; 203 204 struct device_node; 205 struct power_supply; 206 207 /* Run-time specific power supply configuration */ 208 struct power_supply_config { 209 struct device_node *of_node; 210 struct fwnode_handle *fwnode; 211 212 /* Driver private data */ 213 void *drv_data; 214 215 /* Device specific sysfs attributes */ 216 const struct attribute_group **attr_grp; 217 218 char **supplied_to; 219 size_t num_supplicants; 220 }; 221 222 /* Description of power supply */ 223 struct power_supply_desc { 224 const char *name; 225 enum power_supply_type type; 226 enum power_supply_usb_type *usb_types; 227 size_t num_usb_types; 228 enum power_supply_property *properties; 229 size_t num_properties; 230 231 /* 232 * Functions for drivers implementing power supply class. 233 * These shouldn't be called directly by other drivers for accessing 234 * this power supply. Instead use power_supply_*() functions (for 235 * example power_supply_get_property()). 236 */ 237 int (*get_property)(struct power_supply *psy, 238 enum power_supply_property psp, 239 union power_supply_propval *val); 240 int (*set_property)(struct power_supply *psy, 241 enum power_supply_property psp, 242 const union power_supply_propval *val); 243 /* 244 * property_is_writeable() will be called during registration 245 * of power supply. If this happens during device probe then it must 246 * not access internal data of device (because probe did not end). 247 */ 248 int (*property_is_writeable)(struct power_supply *psy, 249 enum power_supply_property psp); 250 void (*external_power_changed)(struct power_supply *psy); 251 void (*set_charged)(struct power_supply *psy); 252 253 /* 254 * Set if thermal zone should not be created for this power supply. 255 * For example for virtual supplies forwarding calls to actual 256 * sensors or other supplies. 257 */ 258 bool no_thermal; 259 /* For APM emulation, think legacy userspace. */ 260 int use_for_apm; 261 }; 262 263 struct power_supply { 264 const struct power_supply_desc *desc; 265 266 char **supplied_to; 267 size_t num_supplicants; 268 269 char **supplied_from; 270 size_t num_supplies; 271 struct device_node *of_node; 272 273 /* Driver private data */ 274 void *drv_data; 275 276 /* private */ 277 struct device dev; 278 struct work_struct changed_work; 279 struct delayed_work deferred_register_work; 280 spinlock_t changed_lock; 281 bool changed; 282 bool initialized; 283 bool removing; 284 atomic_t use_cnt; 285 #ifdef CONFIG_THERMAL 286 struct thermal_zone_device *tzd; 287 struct thermal_cooling_device *tcd; 288 #endif 289 290 #ifdef CONFIG_LEDS_TRIGGERS 291 struct led_trigger *charging_full_trig; 292 char *charging_full_trig_name; 293 struct led_trigger *charging_trig; 294 char *charging_trig_name; 295 struct led_trigger *full_trig; 296 char *full_trig_name; 297 struct led_trigger *online_trig; 298 char *online_trig_name; 299 struct led_trigger *charging_blink_full_solid_trig; 300 char *charging_blink_full_solid_trig_name; 301 #endif 302 }; 303 304 /* 305 * This is recommended structure to specify static power supply parameters. 306 * Generic one, parametrizable for different power supplies. Power supply 307 * class itself does not use it, but that's what implementing most platform 308 * drivers, should try reuse for consistency. 309 */ 310 311 struct power_supply_info { 312 const char *name; 313 int technology; 314 int voltage_max_design; 315 int voltage_min_design; 316 int charge_full_design; 317 int charge_empty_design; 318 int energy_full_design; 319 int energy_empty_design; 320 int use_for_apm; 321 }; 322 323 struct power_supply_battery_ocv_table { 324 int ocv; /* microVolts */ 325 int capacity; /* percent */ 326 }; 327 328 struct power_supply_resistance_temp_table { 329 int temp; /* celsius */ 330 int resistance; /* internal resistance percent */ 331 }; 332 333 #define POWER_SUPPLY_OCV_TEMP_MAX 20 334 335 /* 336 * This is the recommended struct to manage static battery parameters, 337 * populated by power_supply_get_battery_info(). Most platform drivers should 338 * use these for consistency. 339 * Its field names must correspond to elements in enum power_supply_property. 340 * The default field value is -EINVAL. 341 * Power supply class itself doesn't use this. 342 */ 343 344 struct power_supply_battery_info { 345 int energy_full_design_uwh; /* microWatt-hours */ 346 int charge_full_design_uah; /* microAmp-hours */ 347 int voltage_min_design_uv; /* microVolts */ 348 int voltage_max_design_uv; /* microVolts */ 349 int precharge_current_ua; /* microAmps */ 350 int charge_term_current_ua; /* microAmps */ 351 int constant_charge_current_max_ua; /* microAmps */ 352 int constant_charge_voltage_max_uv; /* microVolts */ 353 int factory_internal_resistance_uohm; /* microOhms */ 354 int ocv_temp[POWER_SUPPLY_OCV_TEMP_MAX];/* celsius */ 355 struct power_supply_battery_ocv_table *ocv_table[POWER_SUPPLY_OCV_TEMP_MAX]; 356 int ocv_table_size[POWER_SUPPLY_OCV_TEMP_MAX]; 357 struct power_supply_resistance_temp_table *resist_table; 358 int resist_table_size; 359 }; 360 361 extern struct atomic_notifier_head power_supply_notifier; 362 extern int power_supply_reg_notifier(struct notifier_block *nb); 363 extern void power_supply_unreg_notifier(struct notifier_block *nb); 364 extern struct power_supply *power_supply_get_by_name(const char *name); 365 extern void power_supply_put(struct power_supply *psy); 366 #ifdef CONFIG_OF 367 extern struct power_supply *power_supply_get_by_phandle(struct device_node *np, 368 const char *property); 369 extern struct power_supply *devm_power_supply_get_by_phandle( 370 struct device *dev, const char *property); 371 #else /* !CONFIG_OF */ 372 static inline struct power_supply * 373 power_supply_get_by_phandle(struct device_node *np, const char *property) 374 { return NULL; } 375 static inline struct power_supply * 376 devm_power_supply_get_by_phandle(struct device *dev, const char *property) 377 { return NULL; } 378 #endif /* CONFIG_OF */ 379 380 extern int power_supply_get_battery_info(struct power_supply *psy, 381 struct power_supply_battery_info *info); 382 extern void power_supply_put_battery_info(struct power_supply *psy, 383 struct power_supply_battery_info *info); 384 extern int power_supply_ocv2cap_simple(struct power_supply_battery_ocv_table *table, 385 int table_len, int ocv); 386 extern struct power_supply_battery_ocv_table * 387 power_supply_find_ocv2cap_table(struct power_supply_battery_info *info, 388 int temp, int *table_len); 389 extern int power_supply_batinfo_ocv2cap(struct power_supply_battery_info *info, 390 int ocv, int temp); 391 extern int 392 power_supply_temp2resist_simple(struct power_supply_resistance_temp_table *table, 393 int table_len, int temp); 394 extern void power_supply_changed(struct power_supply *psy); 395 extern int power_supply_am_i_supplied(struct power_supply *psy); 396 extern int power_supply_set_input_current_limit_from_supplier( 397 struct power_supply *psy); 398 extern int power_supply_set_battery_charged(struct power_supply *psy); 399 400 #ifdef CONFIG_POWER_SUPPLY 401 extern int power_supply_is_system_supplied(void); 402 #else 403 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; } 404 #endif 405 406 extern int power_supply_get_property(struct power_supply *psy, 407 enum power_supply_property psp, 408 union power_supply_propval *val); 409 extern int power_supply_set_property(struct power_supply *psy, 410 enum power_supply_property psp, 411 const union power_supply_propval *val); 412 extern int power_supply_property_is_writeable(struct power_supply *psy, 413 enum power_supply_property psp); 414 extern void power_supply_external_power_changed(struct power_supply *psy); 415 416 extern struct power_supply *__must_check 417 power_supply_register(struct device *parent, 418 const struct power_supply_desc *desc, 419 const struct power_supply_config *cfg); 420 extern struct power_supply *__must_check 421 power_supply_register_no_ws(struct device *parent, 422 const struct power_supply_desc *desc, 423 const struct power_supply_config *cfg); 424 extern struct power_supply *__must_check 425 devm_power_supply_register(struct device *parent, 426 const struct power_supply_desc *desc, 427 const struct power_supply_config *cfg); 428 extern struct power_supply *__must_check 429 devm_power_supply_register_no_ws(struct device *parent, 430 const struct power_supply_desc *desc, 431 const struct power_supply_config *cfg); 432 extern void power_supply_unregister(struct power_supply *psy); 433 extern int power_supply_powers(struct power_supply *psy, struct device *dev); 434 435 #define to_power_supply(device) container_of(device, struct power_supply, dev) 436 437 extern void *power_supply_get_drvdata(struct power_supply *psy); 438 /* For APM emulation, think legacy userspace. */ 439 extern struct class *power_supply_class; 440 441 static inline bool power_supply_is_amp_property(enum power_supply_property psp) 442 { 443 switch (psp) { 444 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: 445 case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN: 446 case POWER_SUPPLY_PROP_CHARGE_FULL: 447 case POWER_SUPPLY_PROP_CHARGE_EMPTY: 448 case POWER_SUPPLY_PROP_CHARGE_NOW: 449 case POWER_SUPPLY_PROP_CHARGE_AVG: 450 case POWER_SUPPLY_PROP_CHARGE_COUNTER: 451 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: 452 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: 453 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: 454 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: 455 case POWER_SUPPLY_PROP_CURRENT_MAX: 456 case POWER_SUPPLY_PROP_CURRENT_NOW: 457 case POWER_SUPPLY_PROP_CURRENT_AVG: 458 case POWER_SUPPLY_PROP_CURRENT_BOOT: 459 return 1; 460 default: 461 break; 462 } 463 464 return 0; 465 } 466 467 static inline bool power_supply_is_watt_property(enum power_supply_property psp) 468 { 469 switch (psp) { 470 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: 471 case POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN: 472 case POWER_SUPPLY_PROP_ENERGY_FULL: 473 case POWER_SUPPLY_PROP_ENERGY_EMPTY: 474 case POWER_SUPPLY_PROP_ENERGY_NOW: 475 case POWER_SUPPLY_PROP_ENERGY_AVG: 476 case POWER_SUPPLY_PROP_VOLTAGE_MAX: 477 case POWER_SUPPLY_PROP_VOLTAGE_MIN: 478 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: 479 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: 480 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 481 case POWER_SUPPLY_PROP_VOLTAGE_AVG: 482 case POWER_SUPPLY_PROP_VOLTAGE_OCV: 483 case POWER_SUPPLY_PROP_VOLTAGE_BOOT: 484 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: 485 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: 486 case POWER_SUPPLY_PROP_POWER_NOW: 487 return 1; 488 default: 489 break; 490 } 491 492 return 0; 493 } 494 495 #ifdef CONFIG_POWER_SUPPLY_HWMON 496 int power_supply_add_hwmon_sysfs(struct power_supply *psy); 497 void power_supply_remove_hwmon_sysfs(struct power_supply *psy); 498 #else 499 static inline int power_supply_add_hwmon_sysfs(struct power_supply *psy) 500 { 501 return 0; 502 } 503 504 static inline 505 void power_supply_remove_hwmon_sysfs(struct power_supply *psy) {} 506 #endif 507 508 #endif /* __LINUX_POWER_SUPPLY_H__ */ 509