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 | POWER_SUPPLY_CHARGE_TYPE_LONGLIFE, /* slow speed, longer life */ |
52 | POWER_SUPPLY_CHARGE_TYPE_BYPASS, /* bypassing the charger */ |
53 | }; |
54 | |
55 | enum { |
56 | POWER_SUPPLY_HEALTH_UNKNOWN = 0, |
57 | POWER_SUPPLY_HEALTH_GOOD, |
58 | POWER_SUPPLY_HEALTH_OVERHEAT, |
59 | POWER_SUPPLY_HEALTH_DEAD, |
60 | POWER_SUPPLY_HEALTH_OVERVOLTAGE, |
61 | POWER_SUPPLY_HEALTH_UNSPEC_FAILURE, |
62 | POWER_SUPPLY_HEALTH_COLD, |
63 | POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE, |
64 | POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE, |
65 | POWER_SUPPLY_HEALTH_OVERCURRENT, |
66 | POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED, |
67 | POWER_SUPPLY_HEALTH_WARM, |
68 | POWER_SUPPLY_HEALTH_COOL, |
69 | POWER_SUPPLY_HEALTH_HOT, |
70 | POWER_SUPPLY_HEALTH_NO_BATTERY, |
71 | }; |
72 | |
73 | enum { |
74 | POWER_SUPPLY_TECHNOLOGY_UNKNOWN = 0, |
75 | POWER_SUPPLY_TECHNOLOGY_NiMH, |
76 | POWER_SUPPLY_TECHNOLOGY_LION, |
77 | POWER_SUPPLY_TECHNOLOGY_LIPO, |
78 | POWER_SUPPLY_TECHNOLOGY_LiFe, |
79 | POWER_SUPPLY_TECHNOLOGY_NiCd, |
80 | POWER_SUPPLY_TECHNOLOGY_LiMn, |
81 | }; |
82 | |
83 | enum { |
84 | POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN = 0, |
85 | POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL, |
86 | POWER_SUPPLY_CAPACITY_LEVEL_LOW, |
87 | POWER_SUPPLY_CAPACITY_LEVEL_NORMAL, |
88 | POWER_SUPPLY_CAPACITY_LEVEL_HIGH, |
89 | POWER_SUPPLY_CAPACITY_LEVEL_FULL, |
90 | }; |
91 | |
92 | enum { |
93 | POWER_SUPPLY_SCOPE_UNKNOWN = 0, |
94 | POWER_SUPPLY_SCOPE_SYSTEM, |
95 | POWER_SUPPLY_SCOPE_DEVICE, |
96 | }; |
97 | |
98 | enum power_supply_property { |
99 | /* Properties of type `int' */ |
100 | POWER_SUPPLY_PROP_STATUS = 0, |
101 | POWER_SUPPLY_PROP_CHARGE_TYPE, |
102 | POWER_SUPPLY_PROP_HEALTH, |
103 | POWER_SUPPLY_PROP_PRESENT, |
104 | POWER_SUPPLY_PROP_ONLINE, |
105 | POWER_SUPPLY_PROP_AUTHENTIC, |
106 | POWER_SUPPLY_PROP_TECHNOLOGY, |
107 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
108 | POWER_SUPPLY_PROP_VOLTAGE_MAX, |
109 | POWER_SUPPLY_PROP_VOLTAGE_MIN, |
110 | POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, |
111 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
112 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
113 | POWER_SUPPLY_PROP_VOLTAGE_AVG, |
114 | POWER_SUPPLY_PROP_VOLTAGE_OCV, |
115 | POWER_SUPPLY_PROP_VOLTAGE_BOOT, |
116 | POWER_SUPPLY_PROP_CURRENT_MAX, |
117 | POWER_SUPPLY_PROP_CURRENT_NOW, |
118 | POWER_SUPPLY_PROP_CURRENT_AVG, |
119 | POWER_SUPPLY_PROP_CURRENT_BOOT, |
120 | POWER_SUPPLY_PROP_POWER_NOW, |
121 | POWER_SUPPLY_PROP_POWER_AVG, |
122 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
123 | POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN, |
124 | POWER_SUPPLY_PROP_CHARGE_FULL, |
125 | POWER_SUPPLY_PROP_CHARGE_EMPTY, |
126 | POWER_SUPPLY_PROP_CHARGE_NOW, |
127 | POWER_SUPPLY_PROP_CHARGE_AVG, |
128 | POWER_SUPPLY_PROP_CHARGE_COUNTER, |
129 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, |
130 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, |
131 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, |
132 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, |
133 | POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, |
134 | POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX, |
135 | POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD, /* in percents! */ |
136 | POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD, /* in percents! */ |
137 | POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR, |
138 | POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, |
139 | POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT, |
140 | POWER_SUPPLY_PROP_INPUT_POWER_LIMIT, |
141 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
142 | POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN, |
143 | POWER_SUPPLY_PROP_ENERGY_FULL, |
144 | POWER_SUPPLY_PROP_ENERGY_EMPTY, |
145 | POWER_SUPPLY_PROP_ENERGY_NOW, |
146 | POWER_SUPPLY_PROP_ENERGY_AVG, |
147 | POWER_SUPPLY_PROP_CAPACITY, /* in percents! */ |
148 | POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN, /* in percents! */ |
149 | POWER_SUPPLY_PROP_CAPACITY_ALERT_MAX, /* in percents! */ |
150 | POWER_SUPPLY_PROP_CAPACITY_ERROR_MARGIN, /* in percents! */ |
151 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
152 | POWER_SUPPLY_PROP_TEMP, |
153 | POWER_SUPPLY_PROP_TEMP_MAX, |
154 | POWER_SUPPLY_PROP_TEMP_MIN, |
155 | POWER_SUPPLY_PROP_TEMP_ALERT_MIN, |
156 | POWER_SUPPLY_PROP_TEMP_ALERT_MAX, |
157 | POWER_SUPPLY_PROP_TEMP_AMBIENT, |
158 | POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MIN, |
159 | POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MAX, |
160 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
161 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, |
162 | POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, |
163 | POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, |
164 | POWER_SUPPLY_PROP_TYPE, /* use power_supply.type instead */ |
165 | POWER_SUPPLY_PROP_USB_TYPE, |
166 | POWER_SUPPLY_PROP_SCOPE, |
167 | POWER_SUPPLY_PROP_PRECHARGE_CURRENT, |
168 | POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, |
169 | POWER_SUPPLY_PROP_CALIBRATE, |
170 | POWER_SUPPLY_PROP_MANUFACTURE_YEAR, |
171 | POWER_SUPPLY_PROP_MANUFACTURE_MONTH, |
172 | POWER_SUPPLY_PROP_MANUFACTURE_DAY, |
173 | /* Properties of type `const char *' */ |
174 | POWER_SUPPLY_PROP_MODEL_NAME, |
175 | POWER_SUPPLY_PROP_MANUFACTURER, |
176 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
177 | }; |
178 | |
179 | enum power_supply_type { |
180 | POWER_SUPPLY_TYPE_UNKNOWN = 0, |
181 | POWER_SUPPLY_TYPE_BATTERY, |
182 | POWER_SUPPLY_TYPE_UPS, |
183 | POWER_SUPPLY_TYPE_MAINS, |
184 | POWER_SUPPLY_TYPE_USB, /* Standard Downstream Port */ |
185 | POWER_SUPPLY_TYPE_USB_DCP, /* Dedicated Charging Port */ |
186 | POWER_SUPPLY_TYPE_USB_CDP, /* Charging Downstream Port */ |
187 | POWER_SUPPLY_TYPE_USB_ACA, /* Accessory Charger Adapters */ |
188 | POWER_SUPPLY_TYPE_USB_TYPE_C, /* Type C Port */ |
189 | POWER_SUPPLY_TYPE_USB_PD, /* Power Delivery Port */ |
190 | POWER_SUPPLY_TYPE_USB_PD_DRP, /* PD Dual Role Port */ |
191 | POWER_SUPPLY_TYPE_APPLE_BRICK_ID, /* Apple Charging Method */ |
192 | POWER_SUPPLY_TYPE_WIRELESS, /* Wireless */ |
193 | }; |
194 | |
195 | enum power_supply_usb_type { |
196 | POWER_SUPPLY_USB_TYPE_UNKNOWN = 0, |
197 | POWER_SUPPLY_USB_TYPE_SDP, /* Standard Downstream Port */ |
198 | POWER_SUPPLY_USB_TYPE_DCP, /* Dedicated Charging Port */ |
199 | POWER_SUPPLY_USB_TYPE_CDP, /* Charging Downstream Port */ |
200 | POWER_SUPPLY_USB_TYPE_ACA, /* Accessory Charger Adapters */ |
201 | POWER_SUPPLY_USB_TYPE_C, /* Type C Port */ |
202 | POWER_SUPPLY_USB_TYPE_PD, /* Power Delivery Port */ |
203 | POWER_SUPPLY_USB_TYPE_PD_DRP, /* PD Dual Role Port */ |
204 | POWER_SUPPLY_USB_TYPE_PD_PPS, /* PD Programmable Power Supply */ |
205 | POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID, /* Apple Charging Method */ |
206 | }; |
207 | |
208 | enum power_supply_charge_behaviour { |
209 | POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO = 0, |
210 | POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE, |
211 | POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE, |
212 | }; |
213 | |
214 | enum power_supply_notifier_events { |
215 | PSY_EVENT_PROP_CHANGED, |
216 | }; |
217 | |
218 | union power_supply_propval { |
219 | int intval; |
220 | const char *strval; |
221 | }; |
222 | |
223 | struct device_node; |
224 | struct power_supply; |
225 | |
226 | /* Run-time specific power supply configuration */ |
227 | struct power_supply_config { |
228 | struct device_node *of_node; |
229 | struct fwnode_handle *fwnode; |
230 | |
231 | /* Driver private data */ |
232 | void *drv_data; |
233 | |
234 | /* Device specific sysfs attributes */ |
235 | const struct attribute_group **attr_grp; |
236 | |
237 | char **supplied_to; |
238 | size_t num_supplicants; |
239 | }; |
240 | |
241 | /* Description of power supply */ |
242 | struct power_supply_desc { |
243 | const char *name; |
244 | enum power_supply_type type; |
245 | const enum power_supply_usb_type *usb_types; |
246 | size_t num_usb_types; |
247 | const enum power_supply_property *properties; |
248 | size_t num_properties; |
249 | |
250 | /* |
251 | * Functions for drivers implementing power supply class. |
252 | * These shouldn't be called directly by other drivers for accessing |
253 | * this power supply. Instead use power_supply_*() functions (for |
254 | * example power_supply_get_property()). |
255 | */ |
256 | int (*get_property)(struct power_supply *psy, |
257 | enum power_supply_property psp, |
258 | union power_supply_propval *val); |
259 | int (*set_property)(struct power_supply *psy, |
260 | enum power_supply_property psp, |
261 | const union power_supply_propval *val); |
262 | /* |
263 | * property_is_writeable() will be called during registration |
264 | * of power supply. If this happens during device probe then it must |
265 | * not access internal data of device (because probe did not end). |
266 | */ |
267 | int (*property_is_writeable)(struct power_supply *psy, |
268 | enum power_supply_property psp); |
269 | void (*external_power_changed)(struct power_supply *psy); |
270 | void (*set_charged)(struct power_supply *psy); |
271 | |
272 | /* |
273 | * Set if thermal zone should not be created for this power supply. |
274 | * For example for virtual supplies forwarding calls to actual |
275 | * sensors or other supplies. |
276 | */ |
277 | bool no_thermal; |
278 | /* For APM emulation, think legacy userspace. */ |
279 | int use_for_apm; |
280 | }; |
281 | |
282 | struct power_supply { |
283 | const struct power_supply_desc *desc; |
284 | |
285 | char **supplied_to; |
286 | size_t num_supplicants; |
287 | |
288 | char **supplied_from; |
289 | size_t num_supplies; |
290 | struct device_node *of_node; |
291 | |
292 | /* Driver private data */ |
293 | void *drv_data; |
294 | |
295 | /* private */ |
296 | struct device dev; |
297 | struct work_struct changed_work; |
298 | struct delayed_work deferred_register_work; |
299 | spinlock_t changed_lock; |
300 | bool changed; |
301 | bool initialized; |
302 | bool removing; |
303 | atomic_t use_cnt; |
304 | struct power_supply_battery_info *battery_info; |
305 | #ifdef CONFIG_THERMAL |
306 | struct thermal_zone_device *tzd; |
307 | struct thermal_cooling_device *tcd; |
308 | #endif |
309 | |
310 | #ifdef CONFIG_LEDS_TRIGGERS |
311 | struct led_trigger *charging_full_trig; |
312 | char *charging_full_trig_name; |
313 | struct led_trigger *charging_trig; |
314 | char *charging_trig_name; |
315 | struct led_trigger *full_trig; |
316 | char *full_trig_name; |
317 | struct led_trigger *online_trig; |
318 | char *online_trig_name; |
319 | struct led_trigger *charging_blink_full_solid_trig; |
320 | char *charging_blink_full_solid_trig_name; |
321 | #endif |
322 | }; |
323 | |
324 | /* |
325 | * This is recommended structure to specify static power supply parameters. |
326 | * Generic one, parametrizable for different power supplies. Power supply |
327 | * class itself does not use it, but that's what implementing most platform |
328 | * drivers, should try reuse for consistency. |
329 | */ |
330 | |
331 | struct power_supply_info { |
332 | const char *name; |
333 | int technology; |
334 | int voltage_max_design; |
335 | int voltage_min_design; |
336 | int charge_full_design; |
337 | int charge_empty_design; |
338 | int energy_full_design; |
339 | int energy_empty_design; |
340 | int use_for_apm; |
341 | }; |
342 | |
343 | struct power_supply_battery_ocv_table { |
344 | int ocv; /* microVolts */ |
345 | int capacity; /* percent */ |
346 | }; |
347 | |
348 | struct power_supply_resistance_temp_table { |
349 | int temp; /* celsius */ |
350 | int resistance; /* internal resistance percent */ |
351 | }; |
352 | |
353 | struct power_supply_vbat_ri_table { |
354 | int vbat_uv; /* Battery voltage in microvolt */ |
355 | int ri_uohm; /* Internal resistance in microohm */ |
356 | }; |
357 | |
358 | /** |
359 | * struct power_supply_maintenance_charge_table - setting for maintenace charging |
360 | * @charge_current_max_ua: maintenance charging current that is used to keep |
361 | * the charge of the battery full as current is consumed after full charging. |
362 | * The corresponding charge_voltage_max_uv is used as a safeguard: when we |
363 | * reach this voltage the maintenance charging current is turned off. It is |
364 | * turned back on if we fall below this voltage. |
365 | * @charge_voltage_max_uv: maintenance charging voltage that is usually a bit |
366 | * lower than the constant_charge_voltage_max_uv. We can apply this settings |
367 | * charge_current_max_ua until we get back up to this voltage. |
368 | * @safety_timer_minutes: maintenance charging safety timer, with an expiry |
369 | * time in minutes. We will only use maintenance charging in this setting |
370 | * for a certain amount of time, then we will first move to the next |
371 | * maintenance charge current and voltage pair in respective array and wait |
372 | * for the next safety timer timeout, or, if we reached the last maintencance |
373 | * charging setting, disable charging until we reach |
374 | * charge_restart_voltage_uv and restart ordinary CC/CV charging from there. |
375 | * These timers should be chosen to align with the typical discharge curve |
376 | * for the battery. |
377 | * |
378 | * Ordinary CC/CV charging will stop charging when the charge current goes |
379 | * below charge_term_current_ua, and then restart it (if the device is still |
380 | * plugged into the charger) at charge_restart_voltage_uv. This happens in most |
381 | * consumer products because the power usage while connected to a charger is |
382 | * not zero, and devices are not manufactured to draw power directly from the |
383 | * charger: instead they will at all times dissipate the battery a little, like |
384 | * the power used in standby mode. This will over time give a charge graph |
385 | * such as this: |
386 | * |
387 | * Energy |
388 | * ^ ... ... ... ... ... ... ... |
389 | * | . . . . . . . . . . . . . |
390 | * | .. . .. . .. . .. . .. . .. . .. |
391 | * |. .. .. .. .. .. .. |
392 | * +-------------------------------------------------------------------> t |
393 | * |
394 | * Practically this means that the Li-ions are wandering back and forth in the |
395 | * battery and this causes degeneration of the battery anode and cathode. |
396 | * To prolong the life of the battery, maintenance charging is applied after |
397 | * reaching charge_term_current_ua to hold up the charge in the battery while |
398 | * consuming power, thus lowering the wear on the battery: |
399 | * |
400 | * Energy |
401 | * ^ ....................................... |
402 | * | . ...................... |
403 | * | .. |
404 | * |. |
405 | * +-------------------------------------------------------------------> t |
406 | * |
407 | * Maintenance charging uses the voltages from this table: a table of settings |
408 | * is traversed using a slightly lower current and voltage than what is used for |
409 | * CC/CV charging. The maintenance charging will for safety reasons not go on |
410 | * indefinately: we lower the current and voltage with successive maintenance |
411 | * settings, then disable charging completely after we reach the last one, |
412 | * and after that we do not restart charging until we reach |
413 | * charge_restart_voltage_uv (see struct power_supply_battery_info) and restart |
414 | * ordinary CC/CV charging from there. |
415 | * |
416 | * As an example, a Samsung EB425161LA Lithium-Ion battery is CC/CV charged |
417 | * at 900mA to 4340mV, then maintenance charged at 600mA and 4150mV for up to |
418 | * 60 hours, then maintenance charged at 600mA and 4100mV for up to 200 hours. |
419 | * After this the charge cycle is restarted waiting for |
420 | * charge_restart_voltage_uv. |
421 | * |
422 | * For most mobile electronics this type of maintenance charging is enough for |
423 | * the user to disconnect the device and make use of it before both maintenance |
424 | * charging cycles are complete, if the current and voltage has been chosen |
425 | * appropriately. These need to be determined from battery discharge curves |
426 | * and expected standby current. |
427 | * |
428 | * If the voltage anyway drops to charge_restart_voltage_uv during maintenance |
429 | * charging, ordinary CC/CV charging is restarted. This can happen if the |
430 | * device is e.g. actively used during charging, so more current is drawn than |
431 | * the expected stand-by current. Also overvoltage protection will be applied |
432 | * as usual. |
433 | */ |
434 | struct power_supply_maintenance_charge_table { |
435 | int charge_current_max_ua; |
436 | int charge_voltage_max_uv; |
437 | int charge_safety_timer_minutes; |
438 | }; |
439 | |
440 | #define POWER_SUPPLY_OCV_TEMP_MAX 20 |
441 | |
442 | /** |
443 | * struct power_supply_battery_info - information about batteries |
444 | * @technology: from the POWER_SUPPLY_TECHNOLOGY_* enum |
445 | * @energy_full_design_uwh: energy content when fully charged in microwatt |
446 | * hours |
447 | * @charge_full_design_uah: charge content when fully charged in microampere |
448 | * hours |
449 | * @voltage_min_design_uv: minimum voltage across the poles when the battery |
450 | * is at minimum voltage level in microvolts. If the voltage drops below this |
451 | * level the battery will need precharging when using CC/CV charging. |
452 | * @voltage_max_design_uv: voltage across the poles when the battery is fully |
453 | * charged in microvolts. This is the "nominal voltage" i.e. the voltage |
454 | * printed on the label of the battery. |
455 | * @tricklecharge_current_ua: the tricklecharge current used when trickle |
456 | * charging the battery in microamperes. This is the charging phase when the |
457 | * battery is completely empty and we need to carefully trickle in some |
458 | * charge until we reach the precharging voltage. |
459 | * @precharge_current_ua: current to use in the precharge phase in microamperes, |
460 | * the precharge rate is limited by limiting the current to this value. |
461 | * @precharge_voltage_max_uv: the maximum voltage allowed when precharging in |
462 | * microvolts. When we pass this voltage we will nominally switch over to the |
463 | * CC (constant current) charging phase defined by constant_charge_current_ua |
464 | * and constant_charge_voltage_max_uv. |
465 | * @charge_term_current_ua: when the current in the CV (constant voltage) |
466 | * charging phase drops below this value in microamperes the charging will |
467 | * terminate completely and not restart until the voltage over the battery |
468 | * poles reach charge_restart_voltage_uv unless we use maintenance charging. |
469 | * @charge_restart_voltage_uv: when the battery has been fully charged by |
470 | * CC/CV charging and charging has been disabled, and the voltage subsequently |
471 | * drops below this value in microvolts, the charging will be restarted |
472 | * (typically using CV charging). |
473 | * @overvoltage_limit_uv: If the voltage exceeds the nominal voltage |
474 | * voltage_max_design_uv and we reach this voltage level, all charging must |
475 | * stop and emergency procedures take place, such as shutting down the system |
476 | * in some cases. |
477 | * @constant_charge_current_max_ua: current in microamperes to use in the CC |
478 | * (constant current) charging phase. The charging rate is limited |
479 | * by this current. This is the main charging phase and as the current is |
480 | * constant into the battery the voltage slowly ascends to |
481 | * constant_charge_voltage_max_uv. |
482 | * @constant_charge_voltage_max_uv: voltage in microvolts signifying the end of |
483 | * the CC (constant current) charging phase and the beginning of the CV |
484 | * (constant voltage) charging phase. |
485 | * @maintenance_charge: an array of maintenance charging settings to be used |
486 | * after the main CC/CV charging phase is complete. |
487 | * @maintenance_charge_size: the number of maintenance charging settings in |
488 | * maintenance_charge. |
489 | * @alert_low_temp_charge_current_ua: The charging current to use if the battery |
490 | * enters low alert temperature, i.e. if the internal temperature is between |
491 | * temp_alert_min and temp_min. No matter the charging phase, this |
492 | * and alert_high_temp_charge_voltage_uv will be applied. |
493 | * @alert_low_temp_charge_voltage_uv: Same as alert_low_temp_charge_current_ua, |
494 | * but for the charging voltage. |
495 | * @alert_high_temp_charge_current_ua: The charging current to use if the |
496 | * battery enters high alert temperature, i.e. if the internal temperature is |
497 | * between temp_alert_max and temp_max. No matter the charging phase, this |
498 | * and alert_high_temp_charge_voltage_uv will be applied, usually lowering |
499 | * the charging current as an evasive manouver. |
500 | * @alert_high_temp_charge_voltage_uv: Same as |
501 | * alert_high_temp_charge_current_ua, but for the charging voltage. |
502 | * @factory_internal_resistance_uohm: the internal resistance of the battery |
503 | * at fabrication time, expressed in microohms. This resistance will vary |
504 | * depending on the lifetime and charge of the battery, so this is just a |
505 | * nominal ballpark figure. This internal resistance is given for the state |
506 | * when the battery is discharging. |
507 | * @factory_internal_resistance_charging_uohm: the internal resistance of the |
508 | * battery at fabrication time while charging, expressed in microohms. |
509 | * The charging process will affect the internal resistance of the battery |
510 | * so this value provides a better resistance under these circumstances. |
511 | * This resistance will vary depending on the lifetime and charge of the |
512 | * battery, so this is just a nominal ballpark figure. |
513 | * @ocv_temp: array indicating the open circuit voltage (OCV) capacity |
514 | * temperature indices. This is an array of temperatures in degrees Celsius |
515 | * indicating which capacity table to use for a certain temperature, since |
516 | * the capacity for reasons of chemistry will be different at different |
517 | * temperatures. Determining capacity is a multivariate problem and the |
518 | * temperature is the first variable we determine. |
519 | * @temp_ambient_alert_min: the battery will go outside of operating conditions |
520 | * when the ambient temperature goes below this temperature in degrees |
521 | * Celsius. |
522 | * @temp_ambient_alert_max: the battery will go outside of operating conditions |
523 | * when the ambient temperature goes above this temperature in degrees |
524 | * Celsius. |
525 | * @temp_alert_min: the battery should issue an alert if the internal |
526 | * temperature goes below this temperature in degrees Celsius. |
527 | * @temp_alert_max: the battery should issue an alert if the internal |
528 | * temperature goes above this temperature in degrees Celsius. |
529 | * @temp_min: the battery will go outside of operating conditions when |
530 | * the internal temperature goes below this temperature in degrees Celsius. |
531 | * Normally this means the system should shut down. |
532 | * @temp_max: the battery will go outside of operating conditions when |
533 | * the internal temperature goes above this temperature in degrees Celsius. |
534 | * Normally this means the system should shut down. |
535 | * @ocv_table: for each entry in ocv_temp there is a corresponding entry in |
536 | * ocv_table and a size for each entry in ocv_table_size. These arrays |
537 | * determine the capacity in percent in relation to the voltage in microvolts |
538 | * at the indexed temperature. |
539 | * @ocv_table_size: for each entry in ocv_temp this array is giving the size of |
540 | * each entry in the array of capacity arrays in ocv_table. |
541 | * @resist_table: this is a table that correlates a battery temperature to the |
542 | * expected internal resistance at this temperature. The resistance is given |
543 | * as a percentage of factory_internal_resistance_uohm. Knowing the |
544 | * resistance of the battery is usually necessary for calculating the open |
545 | * circuit voltage (OCV) that is then used with the ocv_table to calculate |
546 | * the capacity of the battery. The resist_table must be ordered descending |
547 | * by temperature: highest temperature with lowest resistance first, lowest |
548 | * temperature with highest resistance last. |
549 | * @resist_table_size: the number of items in the resist_table. |
550 | * @vbat2ri_discharging: this is a table that correlates Battery voltage (VBAT) |
551 | * to internal resistance (Ri). The resistance is given in microohm for the |
552 | * corresponding voltage in microvolts. The internal resistance is used to |
553 | * determine the open circuit voltage so that we can determine the capacity |
554 | * of the battery. These voltages to resistance tables apply when the battery |
555 | * is discharging. The table must be ordered descending by voltage: highest |
556 | * voltage first. |
557 | * @vbat2ri_discharging_size: the number of items in the vbat2ri_discharging |
558 | * table. |
559 | * @vbat2ri_charging: same function as vbat2ri_discharging but for the state |
560 | * when the battery is charging. Being under charge changes the battery's |
561 | * internal resistance characteristics so a separate table is needed.* |
562 | * The table must be ordered descending by voltage: highest voltage first. |
563 | * @vbat2ri_charging_size: the number of items in the vbat2ri_charging |
564 | * table. |
565 | * @bti_resistance_ohm: The Battery Type Indicator (BIT) nominal resistance |
566 | * in ohms for this battery, if an identification resistor is mounted |
567 | * between a third battery terminal and ground. This scheme is used by a lot |
568 | * of mobile device batteries. |
569 | * @bti_resistance_tolerance: The tolerance in percent of the BTI resistance, |
570 | * for example 10 for +/- 10%, if the bti_resistance is set to 7000 and the |
571 | * tolerance is 10% we will detect a proper battery if the BTI resistance |
572 | * is between 6300 and 7700 Ohm. |
573 | * |
574 | * This is the recommended struct to manage static battery parameters, |
575 | * populated by power_supply_get_battery_info(). Most platform drivers should |
576 | * use these for consistency. |
577 | * |
578 | * Its field names must correspond to elements in enum power_supply_property. |
579 | * The default field value is -EINVAL or NULL for pointers. |
580 | * |
581 | * CC/CV CHARGING: |
582 | * |
583 | * The charging parameters here assume a CC/CV charging scheme. This method |
584 | * is most common with Lithium Ion batteries (other methods are possible) and |
585 | * looks as follows: |
586 | * |
587 | * ^ Battery voltage |
588 | * | --- overvoltage_limit_uv |
589 | * | |
590 | * | ................................................... |
591 | * | .. constant_charge_voltage_max_uv |
592 | * | .. |
593 | * | . |
594 | * | . |
595 | * | . |
596 | * | . |
597 | * | . |
598 | * | .. precharge_voltage_max_uv |
599 | * | .. |
600 | * |. (trickle charging) |
601 | * +------------------------------------------------------------------> time |
602 | * |
603 | * ^ Current into the battery |
604 | * | |
605 | * | ............. constant_charge_current_max_ua |
606 | * | . . |
607 | * | . . |
608 | * | . . |
609 | * | . . |
610 | * | . .. |
611 | * | . .... |
612 | * | . ..... |
613 | * | ... precharge_current_ua ....... charge_term_current_ua |
614 | * | . . |
615 | * | . . |
616 | * |.... tricklecharge_current_ua . |
617 | * | . |
618 | * +-----------------------------------------------------------------> time |
619 | * |
620 | * These diagrams are synchronized on time and the voltage and current |
621 | * follow each other. |
622 | * |
623 | * With CC/CV charging commence over time like this for an empty battery: |
624 | * |
625 | * 1. When the battery is completely empty it may need to be charged with |
626 | * an especially small current so that electrons just "trickle in", |
627 | * this is the tricklecharge_current_ua. |
628 | * |
629 | * 2. Next a small initial pre-charge current (precharge_current_ua) |
630 | * is applied if the voltage is below precharge_voltage_max_uv until we |
631 | * reach precharge_voltage_max_uv. CAUTION: in some texts this is referred |
632 | * to as "trickle charging" but the use in the Linux kernel is different |
633 | * see below! |
634 | * |
635 | * 3. Then the main charging current is applied, which is called the constant |
636 | * current (CC) phase. A current regulator is set up to allow |
637 | * constant_charge_current_max_ua of current to flow into the battery. |
638 | * The chemical reaction in the battery will make the voltage go up as |
639 | * charge goes into the battery. This current is applied until we reach |
640 | * the constant_charge_voltage_max_uv voltage. |
641 | * |
642 | * 4. At this voltage we switch over to the constant voltage (CV) phase. This |
643 | * means we allow current to go into the battery, but we keep the voltage |
644 | * fixed. This current will continue to charge the battery while keeping |
645 | * the voltage the same. A chemical reaction in the battery goes on |
646 | * storing energy without affecting the voltage. Over time the current |
647 | * will slowly drop and when we reach charge_term_current_ua we will |
648 | * end the constant voltage phase. |
649 | * |
650 | * After this the battery is fully charged, and if we do not support maintenance |
651 | * charging, the charging will not restart until power dissipation makes the |
652 | * voltage fall so that we reach charge_restart_voltage_uv and at this point |
653 | * we restart charging at the appropriate phase, usually this will be inside |
654 | * the CV phase. |
655 | * |
656 | * If we support maintenance charging the voltage is however kept high after |
657 | * the CV phase with a very low current. This is meant to let the same charge |
658 | * go in for usage while the charger is still connected, mainly for |
659 | * dissipation for the power consuming entity while connected to the |
660 | * charger. |
661 | * |
662 | * All charging MUST terminate if the overvoltage_limit_uv is ever reached. |
663 | * Overcharging Lithium Ion cells can be DANGEROUS and lead to fire or |
664 | * explosions. |
665 | * |
666 | * DETERMINING BATTERY CAPACITY: |
667 | * |
668 | * Several members of the struct deal with trying to determine the remaining |
669 | * capacity in the battery, usually as a percentage of charge. In practice |
670 | * many chargers uses a so-called fuel gauge or coloumb counter that measure |
671 | * how much charge goes into the battery and how much goes out (+/- leak |
672 | * consumption). This does not help if we do not know how much capacity the |
673 | * battery has to begin with, such as when it is first used or was taken out |
674 | * and charged in a separate charger. Therefore many capacity algorithms use |
675 | * the open circuit voltage with a look-up table to determine the rough |
676 | * capacity of the battery. The open circuit voltage can be conceptualized |
677 | * with an ideal voltage source (V) in series with an internal resistance (Ri) |
678 | * like this: |
679 | * |
680 | * +-------> IBAT >----------------+ |
681 | * | ^ | |
682 | * [ ] Ri | | |
683 | * | | VBAT | |
684 | * o <---------- | | |
685 | * +| ^ | [ ] Rload |
686 | * .---. | | | |
687 | * | V | | OCV | | |
688 | * '---' | | | |
689 | * | | | | |
690 | * GND +-------------------------------+ |
691 | * |
692 | * If we disconnect the load (here simplified as a fixed resistance Rload) |
693 | * and measure VBAT with a infinite impedance voltage meter we will get |
694 | * VBAT = OCV and this assumption is sometimes made even under load, assuming |
695 | * Rload is insignificant. However this will be of dubious quality because the |
696 | * load is rarely that small and Ri is strongly nonlinear depending on |
697 | * temperature and how much capacity is left in the battery due to the |
698 | * chemistry involved. |
699 | * |
700 | * In many practical applications we cannot just disconnect the battery from |
701 | * the load, so instead we often try to measure the instantaneous IBAT (the |
702 | * current out from the battery), estimate the Ri and thus calculate the |
703 | * voltage drop over Ri and compensate like this: |
704 | * |
705 | * OCV = VBAT - (IBAT * Ri) |
706 | * |
707 | * The tables vbat2ri_discharging and vbat2ri_charging are used to determine |
708 | * (by interpolation) the Ri from the VBAT under load. These curves are highly |
709 | * nonlinear and may need many datapoints but can be found in datasheets for |
710 | * some batteries. This gives the compensated open circuit voltage (OCV) for |
711 | * the battery even under load. Using this method will also compensate for |
712 | * temperature changes in the environment: this will also make the internal |
713 | * resistance change, and it will affect the VBAT under load, so correlating |
714 | * VBAT to Ri takes both remaining capacity and temperature into consideration. |
715 | * |
716 | * Alternatively a manufacturer can specify how the capacity of the battery |
717 | * is dependent on the battery temperature which is the main factor affecting |
718 | * Ri. As we know all checmical reactions are faster when it is warm and slower |
719 | * when it is cold. You can put in 1500mAh and only get 800mAh out before the |
720 | * voltage drops too low for example. This effect is also highly nonlinear and |
721 | * the purpose of the table resist_table: this will take a temperature and |
722 | * tell us how big percentage of Ri the specified temperature correlates to. |
723 | * Usually we have 100% of the factory_internal_resistance_uohm at 25 degrees |
724 | * Celsius. |
725 | * |
726 | * The power supply class itself doesn't use this struct as of now. |
727 | */ |
728 | |
729 | struct power_supply_battery_info { |
730 | unsigned int technology; |
731 | int energy_full_design_uwh; |
732 | int charge_full_design_uah; |
733 | int voltage_min_design_uv; |
734 | int voltage_max_design_uv; |
735 | int tricklecharge_current_ua; |
736 | int precharge_current_ua; |
737 | int precharge_voltage_max_uv; |
738 | int charge_term_current_ua; |
739 | int charge_restart_voltage_uv; |
740 | int overvoltage_limit_uv; |
741 | int constant_charge_current_max_ua; |
742 | int constant_charge_voltage_max_uv; |
743 | struct power_supply_maintenance_charge_table *maintenance_charge; |
744 | int maintenance_charge_size; |
745 | int alert_low_temp_charge_current_ua; |
746 | int alert_low_temp_charge_voltage_uv; |
747 | int alert_high_temp_charge_current_ua; |
748 | int alert_high_temp_charge_voltage_uv; |
749 | int factory_internal_resistance_uohm; |
750 | int factory_internal_resistance_charging_uohm; |
751 | int ocv_temp[POWER_SUPPLY_OCV_TEMP_MAX]; |
752 | int temp_ambient_alert_min; |
753 | int temp_ambient_alert_max; |
754 | int temp_alert_min; |
755 | int temp_alert_max; |
756 | int temp_min; |
757 | int temp_max; |
758 | struct power_supply_battery_ocv_table *ocv_table[POWER_SUPPLY_OCV_TEMP_MAX]; |
759 | int ocv_table_size[POWER_SUPPLY_OCV_TEMP_MAX]; |
760 | struct power_supply_resistance_temp_table *resist_table; |
761 | int resist_table_size; |
762 | struct power_supply_vbat_ri_table *vbat2ri_discharging; |
763 | int vbat2ri_discharging_size; |
764 | struct power_supply_vbat_ri_table *vbat2ri_charging; |
765 | int vbat2ri_charging_size; |
766 | int bti_resistance_ohm; |
767 | int bti_resistance_tolerance; |
768 | }; |
769 | |
770 | extern int power_supply_reg_notifier(struct notifier_block *nb); |
771 | extern void power_supply_unreg_notifier(struct notifier_block *nb); |
772 | #if IS_ENABLED(CONFIG_POWER_SUPPLY) |
773 | extern struct power_supply *power_supply_get_by_name(const char *name); |
774 | extern void power_supply_put(struct power_supply *psy); |
775 | #else |
776 | static inline void power_supply_put(struct power_supply *psy) {} |
777 | static inline struct power_supply *power_supply_get_by_name(const char *name) |
778 | { return NULL; } |
779 | #endif |
780 | #ifdef CONFIG_OF |
781 | extern struct power_supply *power_supply_get_by_phandle(struct device_node *np, |
782 | const char *property); |
783 | extern struct power_supply *devm_power_supply_get_by_phandle( |
784 | struct device *dev, const char *property); |
785 | #else /* !CONFIG_OF */ |
786 | static inline struct power_supply * |
787 | power_supply_get_by_phandle(struct device_node *np, const char *property) |
788 | { return NULL; } |
789 | static inline struct power_supply * |
790 | devm_power_supply_get_by_phandle(struct device *dev, const char *property) |
791 | { return NULL; } |
792 | #endif /* CONFIG_OF */ |
793 | |
794 | extern const enum power_supply_property power_supply_battery_info_properties[]; |
795 | extern const size_t power_supply_battery_info_properties_size; |
796 | extern int power_supply_get_battery_info(struct power_supply *psy, |
797 | struct power_supply_battery_info **info_out); |
798 | extern void power_supply_put_battery_info(struct power_supply *psy, |
799 | struct power_supply_battery_info *info); |
800 | extern bool power_supply_battery_info_has_prop(struct power_supply_battery_info *info, |
801 | enum power_supply_property psp); |
802 | extern int power_supply_battery_info_get_prop(struct power_supply_battery_info *info, |
803 | enum power_supply_property psp, |
804 | union power_supply_propval *val); |
805 | extern int power_supply_ocv2cap_simple(struct power_supply_battery_ocv_table *table, |
806 | int table_len, int ocv); |
807 | extern struct power_supply_battery_ocv_table * |
808 | power_supply_find_ocv2cap_table(struct power_supply_battery_info *info, |
809 | int temp, int *table_len); |
810 | extern int power_supply_batinfo_ocv2cap(struct power_supply_battery_info *info, |
811 | int ocv, int temp); |
812 | extern int |
813 | power_supply_temp2resist_simple(struct power_supply_resistance_temp_table *table, |
814 | int table_len, int temp); |
815 | extern int power_supply_vbat2ri(struct power_supply_battery_info *info, |
816 | int vbat_uv, bool charging); |
817 | extern struct power_supply_maintenance_charge_table * |
818 | power_supply_get_maintenance_charging_setting(struct power_supply_battery_info *info, int index); |
819 | extern bool power_supply_battery_bti_in_range(struct power_supply_battery_info *info, |
820 | int resistance); |
821 | extern void power_supply_changed(struct power_supply *psy); |
822 | extern int power_supply_am_i_supplied(struct power_supply *psy); |
823 | int power_supply_get_property_from_supplier(struct power_supply *psy, |
824 | enum power_supply_property psp, |
825 | union power_supply_propval *val); |
826 | extern int power_supply_set_battery_charged(struct power_supply *psy); |
827 | |
828 | static inline bool |
829 | power_supply_supports_maintenance_charging(struct power_supply_battery_info *info) |
830 | { |
831 | struct power_supply_maintenance_charge_table *mt; |
832 | |
833 | mt = power_supply_get_maintenance_charging_setting(info, index: 0); |
834 | |
835 | return (mt != NULL); |
836 | } |
837 | |
838 | static inline bool |
839 | power_supply_supports_vbat2ri(struct power_supply_battery_info *info) |
840 | { |
841 | return ((info->vbat2ri_discharging != NULL) && |
842 | info->vbat2ri_discharging_size > 0); |
843 | } |
844 | |
845 | static inline bool |
846 | power_supply_supports_temp2ri(struct power_supply_battery_info *info) |
847 | { |
848 | return ((info->resist_table != NULL) && |
849 | info->resist_table_size > 0); |
850 | } |
851 | |
852 | #ifdef CONFIG_POWER_SUPPLY |
853 | extern int power_supply_is_system_supplied(void); |
854 | #else |
855 | static inline int power_supply_is_system_supplied(void) { return -ENOSYS; } |
856 | #endif |
857 | |
858 | extern int power_supply_get_property(struct power_supply *psy, |
859 | enum power_supply_property psp, |
860 | union power_supply_propval *val); |
861 | #if IS_ENABLED(CONFIG_POWER_SUPPLY) |
862 | extern int power_supply_set_property(struct power_supply *psy, |
863 | enum power_supply_property psp, |
864 | const union power_supply_propval *val); |
865 | #else |
866 | static inline int power_supply_set_property(struct power_supply *psy, |
867 | enum power_supply_property psp, |
868 | const union power_supply_propval *val) |
869 | { return 0; } |
870 | #endif |
871 | extern int power_supply_property_is_writeable(struct power_supply *psy, |
872 | enum power_supply_property psp); |
873 | extern void power_supply_external_power_changed(struct power_supply *psy); |
874 | |
875 | extern struct power_supply *__must_check |
876 | power_supply_register(struct device *parent, |
877 | const struct power_supply_desc *desc, |
878 | const struct power_supply_config *cfg); |
879 | extern struct power_supply *__must_check |
880 | power_supply_register_no_ws(struct device *parent, |
881 | const struct power_supply_desc *desc, |
882 | const struct power_supply_config *cfg); |
883 | extern struct power_supply *__must_check |
884 | devm_power_supply_register(struct device *parent, |
885 | const struct power_supply_desc *desc, |
886 | const struct power_supply_config *cfg); |
887 | extern struct power_supply *__must_check |
888 | devm_power_supply_register_no_ws(struct device *parent, |
889 | const struct power_supply_desc *desc, |
890 | const struct power_supply_config *cfg); |
891 | extern void power_supply_unregister(struct power_supply *psy); |
892 | extern int power_supply_powers(struct power_supply *psy, struct device *dev); |
893 | |
894 | #define to_power_supply(device) container_of(device, struct power_supply, dev) |
895 | |
896 | extern void *power_supply_get_drvdata(struct power_supply *psy); |
897 | /* For APM emulation, think legacy userspace. */ |
898 | extern struct class *power_supply_class; |
899 | |
900 | static inline bool power_supply_is_amp_property(enum power_supply_property psp) |
901 | { |
902 | switch (psp) { |
903 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
904 | case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN: |
905 | case POWER_SUPPLY_PROP_CHARGE_FULL: |
906 | case POWER_SUPPLY_PROP_CHARGE_EMPTY: |
907 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
908 | case POWER_SUPPLY_PROP_CHARGE_AVG: |
909 | case POWER_SUPPLY_PROP_CHARGE_COUNTER: |
910 | case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: |
911 | case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: |
912 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: |
913 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: |
914 | case POWER_SUPPLY_PROP_CURRENT_MAX: |
915 | case POWER_SUPPLY_PROP_CURRENT_NOW: |
916 | case POWER_SUPPLY_PROP_CURRENT_AVG: |
917 | case POWER_SUPPLY_PROP_CURRENT_BOOT: |
918 | return true; |
919 | default: |
920 | break; |
921 | } |
922 | |
923 | return false; |
924 | } |
925 | |
926 | static inline bool power_supply_is_watt_property(enum power_supply_property psp) |
927 | { |
928 | switch (psp) { |
929 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
930 | case POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN: |
931 | case POWER_SUPPLY_PROP_ENERGY_FULL: |
932 | case POWER_SUPPLY_PROP_ENERGY_EMPTY: |
933 | case POWER_SUPPLY_PROP_ENERGY_NOW: |
934 | case POWER_SUPPLY_PROP_ENERGY_AVG: |
935 | case POWER_SUPPLY_PROP_VOLTAGE_MAX: |
936 | case POWER_SUPPLY_PROP_VOLTAGE_MIN: |
937 | case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: |
938 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
939 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
940 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: |
941 | case POWER_SUPPLY_PROP_VOLTAGE_OCV: |
942 | case POWER_SUPPLY_PROP_VOLTAGE_BOOT: |
943 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: |
944 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: |
945 | case POWER_SUPPLY_PROP_POWER_NOW: |
946 | return true; |
947 | default: |
948 | break; |
949 | } |
950 | |
951 | return false; |
952 | } |
953 | |
954 | #ifdef CONFIG_POWER_SUPPLY_HWMON |
955 | int power_supply_add_hwmon_sysfs(struct power_supply *psy); |
956 | void power_supply_remove_hwmon_sysfs(struct power_supply *psy); |
957 | #else |
958 | static inline int power_supply_add_hwmon_sysfs(struct power_supply *psy) |
959 | { |
960 | return 0; |
961 | } |
962 | |
963 | static inline |
964 | void power_supply_remove_hwmon_sysfs(struct power_supply *psy) {} |
965 | #endif |
966 | |
967 | #ifdef CONFIG_SYSFS |
968 | ssize_t power_supply_charge_behaviour_show(struct device *dev, |
969 | unsigned int available_behaviours, |
970 | enum power_supply_charge_behaviour behaviour, |
971 | char *buf); |
972 | |
973 | int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf); |
974 | #else |
975 | static inline |
976 | ssize_t power_supply_charge_behaviour_show(struct device *dev, |
977 | unsigned int available_behaviours, |
978 | enum power_supply_charge_behaviour behaviour, |
979 | char *buf) |
980 | { |
981 | return -EOPNOTSUPP; |
982 | } |
983 | |
984 | static inline int power_supply_charge_behaviour_parse(unsigned int available_behaviours, |
985 | const char *buf) |
986 | { |
987 | return -EOPNOTSUPP; |
988 | } |
989 | #endif |
990 | |
991 | #endif /* __LINUX_POWER_SUPPLY_H__ */ |
992 | |