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 #define POWER_SUPPLY_OCV_TEMP_MAX 20
329 
330 /*
331  * This is the recommended struct to manage static battery parameters,
332  * populated by power_supply_get_battery_info(). Most platform drivers should
333  * use these for consistency.
334  * Its field names must correspond to elements in enum power_supply_property.
335  * The default field value is -EINVAL.
336  * Power supply class itself doesn't use this.
337  */
338 
339 struct power_supply_battery_info {
340 	int energy_full_design_uwh;	    /* microWatt-hours */
341 	int charge_full_design_uah;	    /* microAmp-hours */
342 	int voltage_min_design_uv;	    /* microVolts */
343 	int voltage_max_design_uv;	    /* microVolts */
344 	int precharge_current_ua;	    /* microAmps */
345 	int charge_term_current_ua;	    /* microAmps */
346 	int constant_charge_current_max_ua; /* microAmps */
347 	int constant_charge_voltage_max_uv; /* microVolts */
348 	int factory_internal_resistance_uohm;   /* microOhms */
349 	int ocv_temp[POWER_SUPPLY_OCV_TEMP_MAX];/* celsius */
350 	struct power_supply_battery_ocv_table *ocv_table[POWER_SUPPLY_OCV_TEMP_MAX];
351 	int ocv_table_size[POWER_SUPPLY_OCV_TEMP_MAX];
352 };
353 
354 extern struct atomic_notifier_head power_supply_notifier;
355 extern int power_supply_reg_notifier(struct notifier_block *nb);
356 extern void power_supply_unreg_notifier(struct notifier_block *nb);
357 extern struct power_supply *power_supply_get_by_name(const char *name);
358 extern void power_supply_put(struct power_supply *psy);
359 #ifdef CONFIG_OF
360 extern struct power_supply *power_supply_get_by_phandle(struct device_node *np,
361 							const char *property);
362 extern struct power_supply *devm_power_supply_get_by_phandle(
363 				    struct device *dev, const char *property);
364 #else /* !CONFIG_OF */
365 static inline struct power_supply *
power_supply_get_by_phandle(struct device_node * np,const char * property)366 power_supply_get_by_phandle(struct device_node *np, const char *property)
367 { return NULL; }
368 static inline struct power_supply *
devm_power_supply_get_by_phandle(struct device * dev,const char * property)369 devm_power_supply_get_by_phandle(struct device *dev, const char *property)
370 { return NULL; }
371 #endif /* CONFIG_OF */
372 
373 extern int power_supply_get_battery_info(struct power_supply *psy,
374 					 struct power_supply_battery_info *info);
375 extern void power_supply_put_battery_info(struct power_supply *psy,
376 					  struct power_supply_battery_info *info);
377 extern int power_supply_ocv2cap_simple(struct power_supply_battery_ocv_table *table,
378 				       int table_len, int ocv);
379 extern struct power_supply_battery_ocv_table *
380 power_supply_find_ocv2cap_table(struct power_supply_battery_info *info,
381 				int temp, int *table_len);
382 extern int power_supply_batinfo_ocv2cap(struct power_supply_battery_info *info,
383 					int ocv, int temp);
384 extern void power_supply_changed(struct power_supply *psy);
385 extern int power_supply_am_i_supplied(struct power_supply *psy);
386 extern int power_supply_set_input_current_limit_from_supplier(
387 					 struct power_supply *psy);
388 extern int power_supply_set_battery_charged(struct power_supply *psy);
389 
390 #ifdef CONFIG_POWER_SUPPLY
391 extern int power_supply_is_system_supplied(void);
392 #else
power_supply_is_system_supplied(void)393 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
394 #endif
395 
396 extern int power_supply_get_property(struct power_supply *psy,
397 			    enum power_supply_property psp,
398 			    union power_supply_propval *val);
399 extern int power_supply_set_property(struct power_supply *psy,
400 			    enum power_supply_property psp,
401 			    const union power_supply_propval *val);
402 extern int power_supply_property_is_writeable(struct power_supply *psy,
403 					enum power_supply_property psp);
404 extern void power_supply_external_power_changed(struct power_supply *psy);
405 
406 extern struct power_supply *__must_check
407 power_supply_register(struct device *parent,
408 				 const struct power_supply_desc *desc,
409 				 const struct power_supply_config *cfg);
410 extern struct power_supply *__must_check
411 power_supply_register_no_ws(struct device *parent,
412 				 const struct power_supply_desc *desc,
413 				 const struct power_supply_config *cfg);
414 extern struct power_supply *__must_check
415 devm_power_supply_register(struct device *parent,
416 				 const struct power_supply_desc *desc,
417 				 const struct power_supply_config *cfg);
418 extern struct power_supply *__must_check
419 devm_power_supply_register_no_ws(struct device *parent,
420 				 const struct power_supply_desc *desc,
421 				 const struct power_supply_config *cfg);
422 extern void power_supply_unregister(struct power_supply *psy);
423 extern int power_supply_powers(struct power_supply *psy, struct device *dev);
424 
425 #define to_power_supply(device) container_of(device, struct power_supply, dev)
426 
427 extern void *power_supply_get_drvdata(struct power_supply *psy);
428 /* For APM emulation, think legacy userspace. */
429 extern struct class *power_supply_class;
430 
power_supply_is_amp_property(enum power_supply_property psp)431 static inline bool power_supply_is_amp_property(enum power_supply_property psp)
432 {
433 	switch (psp) {
434 	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
435 	case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
436 	case POWER_SUPPLY_PROP_CHARGE_FULL:
437 	case POWER_SUPPLY_PROP_CHARGE_EMPTY:
438 	case POWER_SUPPLY_PROP_CHARGE_NOW:
439 	case POWER_SUPPLY_PROP_CHARGE_AVG:
440 	case POWER_SUPPLY_PROP_CHARGE_COUNTER:
441 	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
442 	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
443 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
444 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
445 	case POWER_SUPPLY_PROP_CURRENT_MAX:
446 	case POWER_SUPPLY_PROP_CURRENT_NOW:
447 	case POWER_SUPPLY_PROP_CURRENT_AVG:
448 	case POWER_SUPPLY_PROP_CURRENT_BOOT:
449 		return 1;
450 	default:
451 		break;
452 	}
453 
454 	return 0;
455 }
456 
power_supply_is_watt_property(enum power_supply_property psp)457 static inline bool power_supply_is_watt_property(enum power_supply_property psp)
458 {
459 	switch (psp) {
460 	case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
461 	case POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN:
462 	case POWER_SUPPLY_PROP_ENERGY_FULL:
463 	case POWER_SUPPLY_PROP_ENERGY_EMPTY:
464 	case POWER_SUPPLY_PROP_ENERGY_NOW:
465 	case POWER_SUPPLY_PROP_ENERGY_AVG:
466 	case POWER_SUPPLY_PROP_VOLTAGE_MAX:
467 	case POWER_SUPPLY_PROP_VOLTAGE_MIN:
468 	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
469 	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
470 	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
471 	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
472 	case POWER_SUPPLY_PROP_VOLTAGE_OCV:
473 	case POWER_SUPPLY_PROP_VOLTAGE_BOOT:
474 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
475 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
476 	case POWER_SUPPLY_PROP_POWER_NOW:
477 		return 1;
478 	default:
479 		break;
480 	}
481 
482 	return 0;
483 }
484 
485 #ifdef CONFIG_POWER_SUPPLY_HWMON
486 int power_supply_add_hwmon_sysfs(struct power_supply *psy);
487 void power_supply_remove_hwmon_sysfs(struct power_supply *psy);
488 #else
power_supply_add_hwmon_sysfs(struct power_supply * psy)489 static inline int power_supply_add_hwmon_sysfs(struct power_supply *psy)
490 {
491 	return 0;
492 }
493 
494 static inline
power_supply_remove_hwmon_sysfs(struct power_supply * psy)495 void power_supply_remove_hwmon_sysfs(struct power_supply *psy) {}
496 #endif
497 
498 #endif /* __LINUX_POWER_SUPPLY_H__ */
499