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 struct device; 22 23 /* 24 * All voltages, currents, charges, energies, time and temperatures in uV, 25 * µA, µAh, µWh, seconds and tenths of degree Celsius unless otherwise 26 * stated. It's driver's job to convert its raw values to units in which 27 * this class operates. 28 */ 29 30 /* 31 * For systems where the charger determines the maximum battery capacity 32 * the min and max fields should be used to present these values to user 33 * space. Unused/unknown fields will not appear in sysfs. 34 */ 35 36 enum { 37 POWER_SUPPLY_STATUS_UNKNOWN = 0, 38 POWER_SUPPLY_STATUS_CHARGING, 39 POWER_SUPPLY_STATUS_DISCHARGING, 40 POWER_SUPPLY_STATUS_NOT_CHARGING, 41 POWER_SUPPLY_STATUS_FULL, 42 }; 43 44 enum { 45 POWER_SUPPLY_CHARGE_TYPE_UNKNOWN = 0, 46 POWER_SUPPLY_CHARGE_TYPE_NONE, 47 POWER_SUPPLY_CHARGE_TYPE_TRICKLE, 48 POWER_SUPPLY_CHARGE_TYPE_FAST, 49 }; 50 51 enum { 52 POWER_SUPPLY_HEALTH_UNKNOWN = 0, 53 POWER_SUPPLY_HEALTH_GOOD, 54 POWER_SUPPLY_HEALTH_OVERHEAT, 55 POWER_SUPPLY_HEALTH_DEAD, 56 POWER_SUPPLY_HEALTH_OVERVOLTAGE, 57 POWER_SUPPLY_HEALTH_UNSPEC_FAILURE, 58 POWER_SUPPLY_HEALTH_COLD, 59 POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE, 60 POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE, 61 }; 62 63 enum { 64 POWER_SUPPLY_TECHNOLOGY_UNKNOWN = 0, 65 POWER_SUPPLY_TECHNOLOGY_NiMH, 66 POWER_SUPPLY_TECHNOLOGY_LION, 67 POWER_SUPPLY_TECHNOLOGY_LIPO, 68 POWER_SUPPLY_TECHNOLOGY_LiFe, 69 POWER_SUPPLY_TECHNOLOGY_NiCd, 70 POWER_SUPPLY_TECHNOLOGY_LiMn, 71 }; 72 73 enum { 74 POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN = 0, 75 POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL, 76 POWER_SUPPLY_CAPACITY_LEVEL_LOW, 77 POWER_SUPPLY_CAPACITY_LEVEL_NORMAL, 78 POWER_SUPPLY_CAPACITY_LEVEL_HIGH, 79 POWER_SUPPLY_CAPACITY_LEVEL_FULL, 80 }; 81 82 enum { 83 POWER_SUPPLY_SCOPE_UNKNOWN = 0, 84 POWER_SUPPLY_SCOPE_SYSTEM, 85 POWER_SUPPLY_SCOPE_DEVICE, 86 }; 87 88 enum power_supply_property { 89 /* Properties of type `int' */ 90 POWER_SUPPLY_PROP_STATUS = 0, 91 POWER_SUPPLY_PROP_CHARGE_TYPE, 92 POWER_SUPPLY_PROP_HEALTH, 93 POWER_SUPPLY_PROP_PRESENT, 94 POWER_SUPPLY_PROP_ONLINE, 95 POWER_SUPPLY_PROP_AUTHENTIC, 96 POWER_SUPPLY_PROP_TECHNOLOGY, 97 POWER_SUPPLY_PROP_CYCLE_COUNT, 98 POWER_SUPPLY_PROP_VOLTAGE_MAX, 99 POWER_SUPPLY_PROP_VOLTAGE_MIN, 100 POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 101 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 102 POWER_SUPPLY_PROP_VOLTAGE_NOW, 103 POWER_SUPPLY_PROP_VOLTAGE_AVG, 104 POWER_SUPPLY_PROP_VOLTAGE_OCV, 105 POWER_SUPPLY_PROP_CURRENT_MAX, 106 POWER_SUPPLY_PROP_CURRENT_NOW, 107 POWER_SUPPLY_PROP_CURRENT_AVG, 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 /* Properties of type `const char *' */ 150 POWER_SUPPLY_PROP_MODEL_NAME, 151 POWER_SUPPLY_PROP_MANUFACTURER, 152 POWER_SUPPLY_PROP_SERIAL_NUMBER, 153 }; 154 155 enum power_supply_type { 156 POWER_SUPPLY_TYPE_UNKNOWN = 0, 157 POWER_SUPPLY_TYPE_BATTERY, 158 POWER_SUPPLY_TYPE_UPS, 159 POWER_SUPPLY_TYPE_MAINS, 160 POWER_SUPPLY_TYPE_USB, /* Standard Downstream Port */ 161 POWER_SUPPLY_TYPE_USB_DCP, /* Dedicated Charging Port */ 162 POWER_SUPPLY_TYPE_USB_CDP, /* Charging Downstream Port */ 163 POWER_SUPPLY_TYPE_USB_ACA, /* Accessory Charger Adapters */ 164 }; 165 166 enum power_supply_notifier_events { 167 PSY_EVENT_PROP_CHANGED, 168 }; 169 170 union power_supply_propval { 171 int intval; 172 const char *strval; 173 }; 174 175 struct device_node; 176 177 struct power_supply { 178 const char *name; 179 enum power_supply_type type; 180 enum power_supply_property *properties; 181 size_t num_properties; 182 183 char **supplied_to; 184 size_t num_supplicants; 185 186 char **supplied_from; 187 size_t num_supplies; 188 struct device_node *of_node; 189 190 int (*get_property)(struct power_supply *psy, 191 enum power_supply_property psp, 192 union power_supply_propval *val); 193 int (*set_property)(struct power_supply *psy, 194 enum power_supply_property psp, 195 const union power_supply_propval *val); 196 int (*property_is_writeable)(struct power_supply *psy, 197 enum power_supply_property psp); 198 void (*external_power_changed)(struct power_supply *psy); 199 void (*set_charged)(struct power_supply *psy); 200 201 /* For APM emulation, think legacy userspace. */ 202 int use_for_apm; 203 204 /* private */ 205 struct device *dev; 206 struct work_struct changed_work; 207 spinlock_t changed_lock; 208 bool changed; 209 #ifdef CONFIG_THERMAL 210 struct thermal_zone_device *tzd; 211 struct thermal_cooling_device *tcd; 212 #endif 213 214 #ifdef CONFIG_LEDS_TRIGGERS 215 struct led_trigger *charging_full_trig; 216 char *charging_full_trig_name; 217 struct led_trigger *charging_trig; 218 char *charging_trig_name; 219 struct led_trigger *full_trig; 220 char *full_trig_name; 221 struct led_trigger *online_trig; 222 char *online_trig_name; 223 struct led_trigger *charging_blink_full_solid_trig; 224 char *charging_blink_full_solid_trig_name; 225 #endif 226 }; 227 228 /* 229 * This is recommended structure to specify static power supply parameters. 230 * Generic one, parametrizable for different power supplies. Power supply 231 * class itself does not use it, but that's what implementing most platform 232 * drivers, should try reuse for consistency. 233 */ 234 235 struct power_supply_info { 236 const char *name; 237 int technology; 238 int voltage_max_design; 239 int voltage_min_design; 240 int charge_full_design; 241 int charge_empty_design; 242 int energy_full_design; 243 int energy_empty_design; 244 int use_for_apm; 245 }; 246 247 extern struct atomic_notifier_head power_supply_notifier; 248 extern int power_supply_reg_notifier(struct notifier_block *nb); 249 extern void power_supply_unreg_notifier(struct notifier_block *nb); 250 extern struct power_supply *power_supply_get_by_name(const char *name); 251 #ifdef CONFIG_OF 252 extern struct power_supply *power_supply_get_by_phandle(struct device_node *np, 253 const char *property); 254 #else /* !CONFIG_OF */ 255 static inline struct power_supply * 256 power_supply_get_by_phandle(struct device_node *np, const char *property) 257 { return NULL; } 258 #endif /* CONFIG_OF */ 259 extern void power_supply_changed(struct power_supply *psy); 260 extern int power_supply_am_i_supplied(struct power_supply *psy); 261 extern int power_supply_set_battery_charged(struct power_supply *psy); 262 263 #ifdef CONFIG_POWER_SUPPLY 264 extern int power_supply_is_system_supplied(void); 265 #else 266 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; } 267 #endif 268 269 extern int power_supply_register(struct device *parent, 270 struct power_supply *psy); 271 extern int power_supply_register_no_ws(struct device *parent, 272 struct power_supply *psy); 273 extern void power_supply_unregister(struct power_supply *psy); 274 extern int power_supply_powers(struct power_supply *psy, struct device *dev); 275 276 /* For APM emulation, think legacy userspace. */ 277 extern struct class *power_supply_class; 278 279 static inline bool power_supply_is_amp_property(enum power_supply_property psp) 280 { 281 switch (psp) { 282 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: 283 case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN: 284 case POWER_SUPPLY_PROP_CHARGE_FULL: 285 case POWER_SUPPLY_PROP_CHARGE_EMPTY: 286 case POWER_SUPPLY_PROP_CHARGE_NOW: 287 case POWER_SUPPLY_PROP_CHARGE_AVG: 288 case POWER_SUPPLY_PROP_CHARGE_COUNTER: 289 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: 290 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: 291 case POWER_SUPPLY_PROP_CURRENT_MAX: 292 case POWER_SUPPLY_PROP_CURRENT_NOW: 293 case POWER_SUPPLY_PROP_CURRENT_AVG: 294 return 1; 295 default: 296 break; 297 } 298 299 return 0; 300 } 301 302 static inline bool power_supply_is_watt_property(enum power_supply_property psp) 303 { 304 switch (psp) { 305 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: 306 case POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN: 307 case POWER_SUPPLY_PROP_ENERGY_FULL: 308 case POWER_SUPPLY_PROP_ENERGY_EMPTY: 309 case POWER_SUPPLY_PROP_ENERGY_NOW: 310 case POWER_SUPPLY_PROP_ENERGY_AVG: 311 case POWER_SUPPLY_PROP_VOLTAGE_MAX: 312 case POWER_SUPPLY_PROP_VOLTAGE_MIN: 313 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: 314 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: 315 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 316 case POWER_SUPPLY_PROP_VOLTAGE_AVG: 317 case POWER_SUPPLY_PROP_VOLTAGE_OCV: 318 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: 319 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: 320 case POWER_SUPPLY_PROP_POWER_NOW: 321 return 1; 322 default: 323 break; 324 } 325 326 return 0; 327 } 328 329 #endif /* __LINUX_POWER_SUPPLY_H__ */ 330