2 * Universal power supply monitor class
4 * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
5 * Copyright © 2004 Szabolcs Gyurko
6 * Copyright © 2003 Ian Molton <spyro@f2s.com>
8 * Modified: 2004, Oct Szabolcs Gyurko
10 * You may use this code as per GPL version 2
13 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/init.h>
16 #include <linux/slab.h>
17 #include <linux/device.h>
18 #include <linux/notifier.h>
19 #include <linux/err.h>
20 #include <linux/power_supply.h>
21 #include <linux/thermal.h>
22 #include "power_supply.h"
24 /* exported for the APM Power driver, APM emulation */
25 struct class *power_supply_class;
26 EXPORT_SYMBOL_GPL(power_supply_class);
28 ATOMIC_NOTIFIER_HEAD(power_supply_notifier);
29 EXPORT_SYMBOL_GPL(power_supply_notifier);
31 static struct device_type power_supply_dev_type;
33 #define POWER_SUPPLY_DEFERRED_REGISTER_TIME msecs_to_jiffies(10)
35 static bool __power_supply_is_supplied_by(struct power_supply *supplier,
36 struct power_supply *supply)
40 if (!supply->supplied_from && !supplier->supplied_to)
43 /* Support both supplied_to and supplied_from modes */
44 if (supply->supplied_from) {
45 if (!supplier->desc->name)
47 for (i = 0; i < supply->num_supplies; i++)
48 if (!strcmp(supplier->desc->name, supply->supplied_from[i]))
51 if (!supply->desc->name)
53 for (i = 0; i < supplier->num_supplicants; i++)
54 if (!strcmp(supplier->supplied_to[i], supply->desc->name))
61 static int __power_supply_changed_work(struct device *dev, void *data)
63 struct power_supply *psy = data;
64 struct power_supply *pst = dev_get_drvdata(dev);
66 if (__power_supply_is_supplied_by(psy, pst)) {
67 if (pst->desc->external_power_changed)
68 pst->desc->external_power_changed(pst);
74 static void power_supply_changed_work(struct work_struct *work)
77 struct power_supply *psy = container_of(work, struct power_supply,
80 dev_dbg(&psy->dev, "%s\n", __func__);
82 spin_lock_irqsave(&psy->changed_lock, flags);
84 * Check 'changed' here to avoid issues due to race between
85 * power_supply_changed() and this routine. In worst case
86 * power_supply_changed() can be called again just before we take above
87 * lock. During the first call of this routine we will mark 'changed' as
88 * false and it will stay false for the next call as well.
90 if (likely(psy->changed)) {
92 spin_unlock_irqrestore(&psy->changed_lock, flags);
93 class_for_each_device(power_supply_class, NULL, psy,
94 __power_supply_changed_work);
95 power_supply_update_leds(psy);
96 atomic_notifier_call_chain(&power_supply_notifier,
97 PSY_EVENT_PROP_CHANGED, psy);
98 kobject_uevent(&psy->dev.kobj, KOBJ_CHANGE);
99 spin_lock_irqsave(&psy->changed_lock, flags);
103 * Hold the wakeup_source until all events are processed.
104 * power_supply_changed() might have called again and have set 'changed'
107 if (likely(!psy->changed))
109 spin_unlock_irqrestore(&psy->changed_lock, flags);
112 void power_supply_changed(struct power_supply *psy)
116 dev_dbg(&psy->dev, "%s\n", __func__);
118 spin_lock_irqsave(&psy->changed_lock, flags);
120 pm_stay_awake(&psy->dev);
121 spin_unlock_irqrestore(&psy->changed_lock, flags);
122 schedule_work(&psy->changed_work);
124 EXPORT_SYMBOL_GPL(power_supply_changed);
127 * Notify that power supply was registered after parent finished the probing.
129 * Often power supply is registered from driver's probe function. However
130 * calling power_supply_changed() directly from power_supply_register()
131 * would lead to execution of get_property() function provided by the driver
132 * too early - before the probe ends.
134 * Avoid that by waiting on parent's mutex.
136 static void power_supply_deferred_register_work(struct work_struct *work)
138 struct power_supply *psy = container_of(work, struct power_supply,
139 deferred_register_work.work);
142 mutex_lock(&psy->dev.parent->mutex);
144 power_supply_changed(psy);
147 mutex_unlock(&psy->dev.parent->mutex);
151 #include <linux/of.h>
153 static int __power_supply_populate_supplied_from(struct device *dev,
156 struct power_supply *psy = data;
157 struct power_supply *epsy = dev_get_drvdata(dev);
158 struct device_node *np;
162 np = of_parse_phandle(psy->of_node, "power-supplies", i++);
166 if (np == epsy->of_node) {
167 dev_info(&psy->dev, "%s: Found supply : %s\n",
168 psy->desc->name, epsy->desc->name);
169 psy->supplied_from[i-1] = (char *)epsy->desc->name;
180 static int power_supply_populate_supplied_from(struct power_supply *psy)
184 error = class_for_each_device(power_supply_class, NULL, psy,
185 __power_supply_populate_supplied_from);
187 dev_dbg(&psy->dev, "%s %d\n", __func__, error);
192 static int __power_supply_find_supply_from_node(struct device *dev,
195 struct device_node *np = data;
196 struct power_supply *epsy = dev_get_drvdata(dev);
198 /* returning non-zero breaks out of class_for_each_device loop */
199 if (epsy->of_node == np)
205 static int power_supply_find_supply_from_node(struct device_node *supply_node)
210 * class_for_each_device() either returns its own errors or values
211 * returned by __power_supply_find_supply_from_node().
213 * __power_supply_find_supply_from_node() will return 0 (no match)
216 * We return 0 if class_for_each_device() returned 1, -EPROBE_DEFER if
217 * it returned 0, or error as returned by it.
219 error = class_for_each_device(power_supply_class, NULL, supply_node,
220 __power_supply_find_supply_from_node);
222 return error ? (error == 1 ? 0 : error) : -EPROBE_DEFER;
225 static int power_supply_check_supplies(struct power_supply *psy)
227 struct device_node *np;
230 /* If there is already a list honor it */
231 if (psy->supplied_from && psy->num_supplies > 0)
234 /* No device node found, nothing to do */
241 np = of_parse_phandle(psy->of_node, "power-supplies", cnt++);
245 ret = power_supply_find_supply_from_node(np);
249 dev_dbg(&psy->dev, "Failed to find supply!\n");
254 /* Missing valid "power-supplies" entries */
258 /* All supplies found, allocate char ** array for filling */
259 psy->supplied_from = devm_kzalloc(&psy->dev, sizeof(psy->supplied_from),
261 if (!psy->supplied_from) {
262 dev_err(&psy->dev, "Couldn't allocate memory for supply list\n");
266 *psy->supplied_from = devm_kzalloc(&psy->dev,
267 sizeof(char *) * (cnt - 1),
269 if (!*psy->supplied_from) {
270 dev_err(&psy->dev, "Couldn't allocate memory for supply list\n");
274 return power_supply_populate_supplied_from(psy);
277 static inline int power_supply_check_supplies(struct power_supply *psy)
283 struct psy_am_i_supplied_data {
284 struct power_supply *psy;
288 static int __power_supply_am_i_supplied(struct device *dev, void *_data)
290 union power_supply_propval ret = {0,};
291 struct power_supply *epsy = dev_get_drvdata(dev);
292 struct psy_am_i_supplied_data *data = _data;
295 if (__power_supply_is_supplied_by(epsy, data->psy))
296 if (!epsy->desc->get_property(epsy, POWER_SUPPLY_PROP_ONLINE,
303 int power_supply_am_i_supplied(struct power_supply *psy)
305 struct psy_am_i_supplied_data data = { psy, 0 };
308 error = class_for_each_device(power_supply_class, NULL, &data,
309 __power_supply_am_i_supplied);
311 dev_dbg(&psy->dev, "%s count %u err %d\n", __func__, data.count, error);
318 EXPORT_SYMBOL_GPL(power_supply_am_i_supplied);
320 static int __power_supply_is_system_supplied(struct device *dev, void *data)
322 union power_supply_propval ret = {0,};
323 struct power_supply *psy = dev_get_drvdata(dev);
324 unsigned int *count = data;
327 if (psy->desc->type != POWER_SUPPLY_TYPE_BATTERY)
328 if (!psy->desc->get_property(psy, POWER_SUPPLY_PROP_ONLINE,
335 int power_supply_is_system_supplied(void)
338 unsigned int count = 0;
340 error = class_for_each_device(power_supply_class, NULL, &count,
341 __power_supply_is_system_supplied);
344 * If no power class device was found at all, most probably we are
345 * running on a desktop system, so assume we are on mains power.
352 EXPORT_SYMBOL_GPL(power_supply_is_system_supplied);
354 int power_supply_set_battery_charged(struct power_supply *psy)
356 if (atomic_read(&psy->use_cnt) >= 0 &&
357 psy->desc->type == POWER_SUPPLY_TYPE_BATTERY &&
358 psy->desc->set_charged) {
359 psy->desc->set_charged(psy);
365 EXPORT_SYMBOL_GPL(power_supply_set_battery_charged);
367 static int power_supply_match_device_by_name(struct device *dev, const void *data)
369 const char *name = data;
370 struct power_supply *psy = dev_get_drvdata(dev);
372 return strcmp(psy->desc->name, name) == 0;
376 * power_supply_get_by_name() - Search for a power supply and returns its ref
377 * @name: Power supply name to fetch
379 * If power supply was found, it increases reference count for the
380 * internal power supply's device. The user should power_supply_put()
383 * Return: On success returns a reference to a power supply with
384 * matching name equals to @name, a NULL otherwise.
386 struct power_supply *power_supply_get_by_name(const char *name)
388 struct power_supply *psy = NULL;
389 struct device *dev = class_find_device(power_supply_class, NULL, name,
390 power_supply_match_device_by_name);
393 psy = dev_get_drvdata(dev);
394 atomic_inc(&psy->use_cnt);
399 EXPORT_SYMBOL_GPL(power_supply_get_by_name);
402 * power_supply_put() - Drop reference obtained with power_supply_get_by_name
403 * @psy: Reference to put
405 * The reference to power supply should be put before unregistering
408 void power_supply_put(struct power_supply *psy)
412 atomic_dec(&psy->use_cnt);
413 put_device(&psy->dev);
415 EXPORT_SYMBOL_GPL(power_supply_put);
418 static int power_supply_match_device_node(struct device *dev, const void *data)
420 return dev->parent && dev->parent->of_node == data;
424 * power_supply_get_by_phandle() - Search for a power supply and returns its ref
425 * @np: Pointer to device node holding phandle property
426 * @property: Name of property holding a power supply name
428 * If power supply was found, it increases reference count for the
429 * internal power supply's device. The user should power_supply_put()
432 * Return: On success returns a reference to a power supply with
433 * matching name equals to value under @property, NULL or ERR_PTR otherwise.
435 struct power_supply *power_supply_get_by_phandle(struct device_node *np,
436 const char *property)
438 struct device_node *power_supply_np;
439 struct power_supply *psy = NULL;
442 power_supply_np = of_parse_phandle(np, property, 0);
443 if (!power_supply_np)
444 return ERR_PTR(-ENODEV);
446 dev = class_find_device(power_supply_class, NULL, power_supply_np,
447 power_supply_match_device_node);
449 of_node_put(power_supply_np);
452 psy = dev_get_drvdata(dev);
453 atomic_inc(&psy->use_cnt);
458 EXPORT_SYMBOL_GPL(power_supply_get_by_phandle);
460 static void devm_power_supply_put(struct device *dev, void *res)
462 struct power_supply **psy = res;
464 power_supply_put(*psy);
468 * devm_power_supply_get_by_phandle() - Resource managed version of
469 * power_supply_get_by_phandle()
470 * @dev: Pointer to device holding phandle property
471 * @property: Name of property holding a power supply phandle
473 * Return: On success returns a reference to a power supply with
474 * matching name equals to value under @property, NULL or ERR_PTR otherwise.
476 struct power_supply *devm_power_supply_get_by_phandle(struct device *dev,
477 const char *property)
479 struct power_supply **ptr, *psy;
482 return ERR_PTR(-ENODEV);
484 ptr = devres_alloc(devm_power_supply_put, sizeof(*ptr), GFP_KERNEL);
486 return ERR_PTR(-ENOMEM);
488 psy = power_supply_get_by_phandle(dev->of_node, property);
489 if (IS_ERR_OR_NULL(psy)) {
493 devres_add(dev, ptr);
497 EXPORT_SYMBOL_GPL(devm_power_supply_get_by_phandle);
498 #endif /* CONFIG_OF */
500 int power_supply_get_property(struct power_supply *psy,
501 enum power_supply_property psp,
502 union power_supply_propval *val)
504 if (atomic_read(&psy->use_cnt) <= 0) {
505 if (!psy->initialized)
510 return psy->desc->get_property(psy, psp, val);
512 EXPORT_SYMBOL_GPL(power_supply_get_property);
514 int power_supply_set_property(struct power_supply *psy,
515 enum power_supply_property psp,
516 const union power_supply_propval *val)
518 if (atomic_read(&psy->use_cnt) <= 0 || !psy->desc->set_property)
521 return psy->desc->set_property(psy, psp, val);
523 EXPORT_SYMBOL_GPL(power_supply_set_property);
525 int power_supply_property_is_writeable(struct power_supply *psy,
526 enum power_supply_property psp)
528 if (atomic_read(&psy->use_cnt) <= 0 ||
529 !psy->desc->property_is_writeable)
532 return psy->desc->property_is_writeable(psy, psp);
534 EXPORT_SYMBOL_GPL(power_supply_property_is_writeable);
536 void power_supply_external_power_changed(struct power_supply *psy)
538 if (atomic_read(&psy->use_cnt) <= 0 ||
539 !psy->desc->external_power_changed)
542 psy->desc->external_power_changed(psy);
544 EXPORT_SYMBOL_GPL(power_supply_external_power_changed);
546 int power_supply_powers(struct power_supply *psy, struct device *dev)
548 return sysfs_create_link(&psy->dev.kobj, &dev->kobj, "powers");
550 EXPORT_SYMBOL_GPL(power_supply_powers);
552 static void power_supply_dev_release(struct device *dev)
554 struct power_supply *psy = container_of(dev, struct power_supply, dev);
555 pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
559 int power_supply_reg_notifier(struct notifier_block *nb)
561 return atomic_notifier_chain_register(&power_supply_notifier, nb);
563 EXPORT_SYMBOL_GPL(power_supply_reg_notifier);
565 void power_supply_unreg_notifier(struct notifier_block *nb)
567 atomic_notifier_chain_unregister(&power_supply_notifier, nb);
569 EXPORT_SYMBOL_GPL(power_supply_unreg_notifier);
571 #ifdef CONFIG_THERMAL
572 static int power_supply_read_temp(struct thermal_zone_device *tzd,
575 struct power_supply *psy;
576 union power_supply_propval val;
579 WARN_ON(tzd == NULL);
581 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &val);
585 /* Convert tenths of degree Celsius to milli degree Celsius. */
586 *temp = val.intval * 100;
591 static struct thermal_zone_device_ops psy_tzd_ops = {
592 .get_temp = power_supply_read_temp,
595 static int psy_register_thermal(struct power_supply *psy)
599 if (psy->desc->no_thermal)
602 /* Register battery zone device psy reports temperature */
603 for (i = 0; i < psy->desc->num_properties; i++) {
604 if (psy->desc->properties[i] == POWER_SUPPLY_PROP_TEMP) {
605 psy->tzd = thermal_zone_device_register(psy->desc->name,
606 0, 0, psy, &psy_tzd_ops, NULL, 0, 0);
607 return PTR_ERR_OR_ZERO(psy->tzd);
613 static void psy_unregister_thermal(struct power_supply *psy)
615 if (IS_ERR_OR_NULL(psy->tzd))
617 thermal_zone_device_unregister(psy->tzd);
620 /* thermal cooling device callbacks */
621 static int ps_get_max_charge_cntl_limit(struct thermal_cooling_device *tcd,
622 unsigned long *state)
624 struct power_supply *psy;
625 union power_supply_propval val;
629 ret = power_supply_get_property(psy,
630 POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX, &val);
639 static int ps_get_cur_chrage_cntl_limit(struct thermal_cooling_device *tcd,
640 unsigned long *state)
642 struct power_supply *psy;
643 union power_supply_propval val;
647 ret = power_supply_get_property(psy,
648 POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, &val);
657 static int ps_set_cur_charge_cntl_limit(struct thermal_cooling_device *tcd,
660 struct power_supply *psy;
661 union power_supply_propval val;
666 ret = psy->desc->set_property(psy,
667 POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, &val);
672 static struct thermal_cooling_device_ops psy_tcd_ops = {
673 .get_max_state = ps_get_max_charge_cntl_limit,
674 .get_cur_state = ps_get_cur_chrage_cntl_limit,
675 .set_cur_state = ps_set_cur_charge_cntl_limit,
678 static int psy_register_cooler(struct power_supply *psy)
682 /* Register for cooling device if psy can control charging */
683 for (i = 0; i < psy->desc->num_properties; i++) {
684 if (psy->desc->properties[i] ==
685 POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT) {
686 psy->tcd = thermal_cooling_device_register(
687 (char *)psy->desc->name,
689 return PTR_ERR_OR_ZERO(psy->tcd);
695 static void psy_unregister_cooler(struct power_supply *psy)
697 if (IS_ERR_OR_NULL(psy->tcd))
699 thermal_cooling_device_unregister(psy->tcd);
702 static int psy_register_thermal(struct power_supply *psy)
707 static void psy_unregister_thermal(struct power_supply *psy)
711 static int psy_register_cooler(struct power_supply *psy)
716 static void psy_unregister_cooler(struct power_supply *psy)
721 static struct power_supply *__must_check
722 __power_supply_register(struct device *parent,
723 const struct power_supply_desc *desc,
724 const struct power_supply_config *cfg,
728 struct power_supply *psy;
732 pr_warn("%s: Expected proper parent device for '%s'\n",
733 __func__, desc->name);
735 psy = kzalloc(sizeof(*psy), GFP_KERNEL);
737 return ERR_PTR(-ENOMEM);
741 device_initialize(dev);
743 dev->class = power_supply_class;
744 dev->type = &power_supply_dev_type;
745 dev->parent = parent;
746 dev->release = power_supply_dev_release;
747 dev_set_drvdata(dev, psy);
750 psy->drv_data = cfg->drv_data;
751 psy->of_node = cfg->of_node;
752 psy->supplied_to = cfg->supplied_to;
753 psy->num_supplicants = cfg->num_supplicants;
756 rc = dev_set_name(dev, "%s", desc->name);
758 goto dev_set_name_failed;
760 INIT_WORK(&psy->changed_work, power_supply_changed_work);
761 INIT_DELAYED_WORK(&psy->deferred_register_work,
762 power_supply_deferred_register_work);
764 rc = power_supply_check_supplies(psy);
766 dev_info(dev, "Not all required supplies found, defer probe\n");
767 goto check_supplies_failed;
770 spin_lock_init(&psy->changed_lock);
771 rc = device_init_wakeup(dev, ws);
773 goto wakeup_init_failed;
775 rc = device_add(dev);
777 goto device_add_failed;
779 rc = psy_register_thermal(psy);
781 goto register_thermal_failed;
783 rc = psy_register_cooler(psy);
785 goto register_cooler_failed;
787 rc = power_supply_create_triggers(psy);
789 goto create_triggers_failed;
792 * Update use_cnt after any uevents (most notably from device_add()).
793 * We are here still during driver's probe but
794 * the power_supply_uevent() calls back driver's get_property
796 * 1. Driver did not assigned the returned struct power_supply,
797 * 2. Driver could not finish initialization (anything in its probe
798 * after calling power_supply_register()).
800 atomic_inc(&psy->use_cnt);
801 psy->initialized = true;
803 queue_delayed_work(system_power_efficient_wq,
804 &psy->deferred_register_work,
805 POWER_SUPPLY_DEFERRED_REGISTER_TIME);
809 create_triggers_failed:
810 psy_unregister_cooler(psy);
811 register_cooler_failed:
812 psy_unregister_thermal(psy);
813 register_thermal_failed:
817 check_supplies_failed:
824 * power_supply_register() - Register new power supply
825 * @parent: Device to be a parent of power supply's device, usually
826 * the device which probe function calls this
827 * @desc: Description of power supply, must be valid through whole
828 * lifetime of this power supply
829 * @cfg: Run-time specific configuration accessed during registering,
832 * Return: A pointer to newly allocated power_supply on success
833 * or ERR_PTR otherwise.
834 * Use power_supply_unregister() on returned power_supply pointer to release
837 struct power_supply *__must_check power_supply_register(struct device *parent,
838 const struct power_supply_desc *desc,
839 const struct power_supply_config *cfg)
841 return __power_supply_register(parent, desc, cfg, true);
843 EXPORT_SYMBOL_GPL(power_supply_register);
846 * power_supply_register_no_ws() - Register new non-waking-source power supply
847 * @parent: Device to be a parent of power supply's device, usually
848 * the device which probe function calls this
849 * @desc: Description of power supply, must be valid through whole
850 * lifetime of this power supply
851 * @cfg: Run-time specific configuration accessed during registering,
854 * Return: A pointer to newly allocated power_supply on success
855 * or ERR_PTR otherwise.
856 * Use power_supply_unregister() on returned power_supply pointer to release
859 struct power_supply *__must_check
860 power_supply_register_no_ws(struct device *parent,
861 const struct power_supply_desc *desc,
862 const struct power_supply_config *cfg)
864 return __power_supply_register(parent, desc, cfg, false);
866 EXPORT_SYMBOL_GPL(power_supply_register_no_ws);
868 static void devm_power_supply_release(struct device *dev, void *res)
870 struct power_supply **psy = res;
872 power_supply_unregister(*psy);
876 * devm_power_supply_register() - Register managed power supply
877 * @parent: Device to be a parent of power supply's device, usually
878 * the device which probe function calls this
879 * @desc: Description of power supply, must be valid through whole
880 * lifetime of this power supply
881 * @cfg: Run-time specific configuration accessed during registering,
884 * Return: A pointer to newly allocated power_supply on success
885 * or ERR_PTR otherwise.
886 * The returned power_supply pointer will be automatically unregistered
889 struct power_supply *__must_check
890 devm_power_supply_register(struct device *parent,
891 const struct power_supply_desc *desc,
892 const struct power_supply_config *cfg)
894 struct power_supply **ptr, *psy;
896 ptr = devres_alloc(devm_power_supply_release, sizeof(*ptr), GFP_KERNEL);
899 return ERR_PTR(-ENOMEM);
900 psy = __power_supply_register(parent, desc, cfg, true);
905 devres_add(parent, ptr);
909 EXPORT_SYMBOL_GPL(devm_power_supply_register);
912 * devm_power_supply_register_no_ws() - Register managed non-waking-source power supply
913 * @parent: Device to be a parent of power supply's device, usually
914 * the device which probe function calls this
915 * @desc: Description of power supply, must be valid through whole
916 * lifetime of this power supply
917 * @cfg: Run-time specific configuration accessed during registering,
920 * Return: A pointer to newly allocated power_supply on success
921 * or ERR_PTR otherwise.
922 * The returned power_supply pointer will be automatically unregistered
925 struct power_supply *__must_check
926 devm_power_supply_register_no_ws(struct device *parent,
927 const struct power_supply_desc *desc,
928 const struct power_supply_config *cfg)
930 struct power_supply **ptr, *psy;
932 ptr = devres_alloc(devm_power_supply_release, sizeof(*ptr), GFP_KERNEL);
935 return ERR_PTR(-ENOMEM);
936 psy = __power_supply_register(parent, desc, cfg, false);
941 devres_add(parent, ptr);
945 EXPORT_SYMBOL_GPL(devm_power_supply_register_no_ws);
948 * power_supply_unregister() - Remove this power supply from system
949 * @psy: Pointer to power supply to unregister
951 * Remove this power supply from the system. The resources of power supply
952 * will be freed here or on last power_supply_put() call.
954 void power_supply_unregister(struct power_supply *psy)
956 WARN_ON(atomic_dec_return(&psy->use_cnt));
957 cancel_work_sync(&psy->changed_work);
958 cancel_delayed_work_sync(&psy->deferred_register_work);
959 sysfs_remove_link(&psy->dev.kobj, "powers");
960 power_supply_remove_triggers(psy);
961 psy_unregister_cooler(psy);
962 psy_unregister_thermal(psy);
963 device_init_wakeup(&psy->dev, false);
964 device_unregister(&psy->dev);
966 EXPORT_SYMBOL_GPL(power_supply_unregister);
968 void *power_supply_get_drvdata(struct power_supply *psy)
970 return psy->drv_data;
972 EXPORT_SYMBOL_GPL(power_supply_get_drvdata);
974 static int __init power_supply_class_init(void)
976 power_supply_class = class_create(THIS_MODULE, "power_supply");
978 if (IS_ERR(power_supply_class))
979 return PTR_ERR(power_supply_class);
981 power_supply_class->dev_uevent = power_supply_uevent;
982 power_supply_init_attrs(&power_supply_dev_type);
987 static void __exit power_supply_class_exit(void)
989 class_destroy(power_supply_class);
992 subsys_initcall(power_supply_class_init);
993 module_exit(power_supply_class_exit);
995 MODULE_DESCRIPTION("Universal power supply monitor class");
996 MODULE_AUTHOR("Ian Molton <spyro@f2s.com>, "
998 "Anton Vorontsov <cbou@mail.ru>");
999 MODULE_LICENSE("GPL");