Commit | Line | Data |
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4a11b59d AV |
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 | #include <linux/module.h> | |
14 | #include <linux/types.h> | |
15 | #include <linux/init.h> | |
5f487cd3 | 16 | #include <linux/slab.h> |
4a11b59d | 17 | #include <linux/device.h> |
d36240d2 | 18 | #include <linux/notifier.h> |
4a11b59d AV |
19 | #include <linux/err.h> |
20 | #include <linux/power_supply.h> | |
3be330bf | 21 | #include <linux/thermal.h> |
4a11b59d AV |
22 | #include "power_supply.h" |
23 | ||
ff3417e7 | 24 | /* exported for the APM Power driver, APM emulation */ |
4a11b59d | 25 | struct class *power_supply_class; |
ff3417e7 | 26 | EXPORT_SYMBOL_GPL(power_supply_class); |
4a11b59d | 27 | |
d36240d2 PR |
28 | ATOMIC_NOTIFIER_HEAD(power_supply_notifier); |
29 | EXPORT_SYMBOL_GPL(power_supply_notifier); | |
30 | ||
5f487cd3 AV |
31 | static struct device_type power_supply_dev_type; |
32 | ||
5e0848c6 RK |
33 | static bool __power_supply_is_supplied_by(struct power_supply *supplier, |
34 | struct power_supply *supply) | |
35 | { | |
36 | int i; | |
37 | ||
38 | if (!supply->supplied_from && !supplier->supplied_to) | |
39 | return false; | |
40 | ||
41 | /* Support both supplied_to and supplied_from modes */ | |
42 | if (supply->supplied_from) { | |
43 | if (!supplier->name) | |
44 | return false; | |
45 | for (i = 0; i < supply->num_supplies; i++) | |
46 | if (!strcmp(supplier->name, supply->supplied_from[i])) | |
47 | return true; | |
48 | } else { | |
49 | if (!supply->name) | |
50 | return false; | |
51 | for (i = 0; i < supplier->num_supplicants; i++) | |
52 | if (!strcmp(supplier->supplied_to[i], supply->name)) | |
53 | return true; | |
54 | } | |
55 | ||
56 | return false; | |
57 | } | |
58 | ||
443cad92 DY |
59 | static int __power_supply_changed_work(struct device *dev, void *data) |
60 | { | |
e80cf421 | 61 | struct power_supply *psy = data; |
443cad92 | 62 | struct power_supply *pst = dev_get_drvdata(dev); |
443cad92 | 63 | |
5e0848c6 RK |
64 | if (__power_supply_is_supplied_by(psy, pst)) { |
65 | if (pst->external_power_changed) | |
66 | pst->external_power_changed(pst); | |
67 | } | |
68 | ||
443cad92 DY |
69 | return 0; |
70 | } | |
71 | ||
4a11b59d AV |
72 | static void power_supply_changed_work(struct work_struct *work) |
73 | { | |
948dcf96 | 74 | unsigned long flags; |
4a11b59d AV |
75 | struct power_supply *psy = container_of(work, struct power_supply, |
76 | changed_work); | |
4a11b59d | 77 | |
0cddc0a9 | 78 | dev_dbg(psy->dev, "%s\n", __func__); |
4a11b59d | 79 | |
948dcf96 | 80 | spin_lock_irqsave(&psy->changed_lock, flags); |
061f3806 VK |
81 | /* |
82 | * Check 'changed' here to avoid issues due to race between | |
83 | * power_supply_changed() and this routine. In worst case | |
84 | * power_supply_changed() can be called again just before we take above | |
85 | * lock. During the first call of this routine we will mark 'changed' as | |
86 | * false and it will stay false for the next call as well. | |
87 | */ | |
88 | if (likely(psy->changed)) { | |
948dcf96 ZM |
89 | psy->changed = false; |
90 | spin_unlock_irqrestore(&psy->changed_lock, flags); | |
91 | class_for_each_device(power_supply_class, NULL, psy, | |
92 | __power_supply_changed_work); | |
93 | power_supply_update_leds(psy); | |
d36240d2 PR |
94 | atomic_notifier_call_chain(&power_supply_notifier, |
95 | PSY_EVENT_PROP_CHANGED, psy); | |
948dcf96 ZM |
96 | kobject_uevent(&psy->dev->kobj, KOBJ_CHANGE); |
97 | spin_lock_irqsave(&psy->changed_lock, flags); | |
98 | } | |
061f3806 | 99 | |
948dcf96 | 100 | /* |
061f3806 VK |
101 | * Hold the wakeup_source until all events are processed. |
102 | * power_supply_changed() might have called again and have set 'changed' | |
103 | * to true. | |
948dcf96 | 104 | */ |
061f3806 | 105 | if (likely(!psy->changed)) |
948dcf96 ZM |
106 | pm_relax(psy->dev); |
107 | spin_unlock_irqrestore(&psy->changed_lock, flags); | |
4a11b59d AV |
108 | } |
109 | ||
110 | void power_supply_changed(struct power_supply *psy) | |
111 | { | |
948dcf96 ZM |
112 | unsigned long flags; |
113 | ||
0cddc0a9 | 114 | dev_dbg(psy->dev, "%s\n", __func__); |
4a11b59d | 115 | |
948dcf96 ZM |
116 | spin_lock_irqsave(&psy->changed_lock, flags); |
117 | psy->changed = true; | |
118 | pm_stay_awake(psy->dev); | |
119 | spin_unlock_irqrestore(&psy->changed_lock, flags); | |
4a11b59d | 120 | schedule_work(&psy->changed_work); |
4a11b59d | 121 | } |
ff3417e7 | 122 | EXPORT_SYMBOL_GPL(power_supply_changed); |
4a11b59d | 123 | |
f6e0b081 RK |
124 | #ifdef CONFIG_OF |
125 | #include <linux/of.h> | |
126 | ||
127 | static int __power_supply_populate_supplied_from(struct device *dev, | |
128 | void *data) | |
129 | { | |
e80cf421 | 130 | struct power_supply *psy = data; |
f6e0b081 RK |
131 | struct power_supply *epsy = dev_get_drvdata(dev); |
132 | struct device_node *np; | |
133 | int i = 0; | |
134 | ||
135 | do { | |
136 | np = of_parse_phandle(psy->of_node, "power-supplies", i++); | |
137 | if (!np) | |
a0f93b42 | 138 | break; |
f6e0b081 RK |
139 | |
140 | if (np == epsy->of_node) { | |
141 | dev_info(psy->dev, "%s: Found supply : %s\n", | |
142 | psy->name, epsy->name); | |
143 | psy->supplied_from[i-1] = (char *)epsy->name; | |
144 | psy->num_supplies++; | |
2054d6e9 | 145 | of_node_put(np); |
f6e0b081 RK |
146 | break; |
147 | } | |
2054d6e9 | 148 | of_node_put(np); |
f6e0b081 RK |
149 | } while (np); |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | static int power_supply_populate_supplied_from(struct power_supply *psy) | |
155 | { | |
156 | int error; | |
157 | ||
158 | error = class_for_each_device(power_supply_class, NULL, psy, | |
159 | __power_supply_populate_supplied_from); | |
160 | ||
161 | dev_dbg(psy->dev, "%s %d\n", __func__, error); | |
162 | ||
163 | return error; | |
164 | } | |
165 | ||
166 | static int __power_supply_find_supply_from_node(struct device *dev, | |
167 | void *data) | |
168 | { | |
e80cf421 | 169 | struct device_node *np = data; |
f6e0b081 RK |
170 | struct power_supply *epsy = dev_get_drvdata(dev); |
171 | ||
585b0087 | 172 | /* returning non-zero breaks out of class_for_each_device loop */ |
f6e0b081 | 173 | if (epsy->of_node == np) |
585b0087 | 174 | return 1; |
f6e0b081 RK |
175 | |
176 | return 0; | |
177 | } | |
178 | ||
179 | static int power_supply_find_supply_from_node(struct device_node *supply_node) | |
180 | { | |
181 | int error; | |
f6e0b081 RK |
182 | |
183 | /* | |
585b0087 VK |
184 | * class_for_each_device() either returns its own errors or values |
185 | * returned by __power_supply_find_supply_from_node(). | |
186 | * | |
187 | * __power_supply_find_supply_from_node() will return 0 (no match) | |
188 | * or 1 (match). | |
189 | * | |
190 | * We return 0 if class_for_each_device() returned 1, -EPROBE_DEFER if | |
191 | * it returned 0, or error as returned by it. | |
f6e0b081 RK |
192 | */ |
193 | error = class_for_each_device(power_supply_class, NULL, supply_node, | |
194 | __power_supply_find_supply_from_node); | |
195 | ||
585b0087 | 196 | return error ? (error == 1 ? 0 : error) : -EPROBE_DEFER; |
f6e0b081 RK |
197 | } |
198 | ||
199 | static int power_supply_check_supplies(struct power_supply *psy) | |
200 | { | |
201 | struct device_node *np; | |
202 | int cnt = 0; | |
203 | ||
204 | /* If there is already a list honor it */ | |
205 | if (psy->supplied_from && psy->num_supplies > 0) | |
206 | return 0; | |
207 | ||
208 | /* No device node found, nothing to do */ | |
209 | if (!psy->of_node) | |
210 | return 0; | |
211 | ||
212 | do { | |
213 | int ret; | |
214 | ||
215 | np = of_parse_phandle(psy->of_node, "power-supplies", cnt++); | |
216 | if (!np) | |
a0f93b42 | 217 | break; |
f6e0b081 RK |
218 | |
219 | ret = power_supply_find_supply_from_node(np); | |
8468b029 VK |
220 | of_node_put(np); |
221 | ||
f6e0b081 | 222 | if (ret) { |
f5b89aff VK |
223 | dev_dbg(psy->dev, "Failed to find supply!\n"); |
224 | return ret; | |
f6e0b081 RK |
225 | } |
226 | } while (np); | |
227 | ||
f9c85486 VK |
228 | /* Missing valid "power-supplies" entries */ |
229 | if (cnt == 1) | |
230 | return 0; | |
231 | ||
f6e0b081 RK |
232 | /* All supplies found, allocate char ** array for filling */ |
233 | psy->supplied_from = devm_kzalloc(psy->dev, sizeof(psy->supplied_from), | |
234 | GFP_KERNEL); | |
235 | if (!psy->supplied_from) { | |
236 | dev_err(psy->dev, "Couldn't allocate memory for supply list\n"); | |
237 | return -ENOMEM; | |
238 | } | |
239 | ||
8f5a37cb | 240 | *psy->supplied_from = devm_kzalloc(psy->dev, sizeof(char *) * (cnt - 1), |
f6e0b081 RK |
241 | GFP_KERNEL); |
242 | if (!*psy->supplied_from) { | |
243 | dev_err(psy->dev, "Couldn't allocate memory for supply list\n"); | |
244 | return -ENOMEM; | |
245 | } | |
246 | ||
247 | return power_supply_populate_supplied_from(psy); | |
248 | } | |
249 | #else | |
250 | static inline int power_supply_check_supplies(struct power_supply *psy) | |
251 | { | |
252 | return 0; | |
253 | } | |
254 | #endif | |
255 | ||
443cad92 | 256 | static int __power_supply_am_i_supplied(struct device *dev, void *data) |
4a11b59d AV |
257 | { |
258 | union power_supply_propval ret = {0,}; | |
e80cf421 | 259 | struct power_supply *psy = data; |
443cad92 | 260 | struct power_supply *epsy = dev_get_drvdata(dev); |
443cad92 | 261 | |
5e0848c6 | 262 | if (__power_supply_is_supplied_by(epsy, psy)) |
1c42a389 VK |
263 | if (!epsy->get_property(epsy, POWER_SUPPLY_PROP_ONLINE, &ret)) |
264 | return ret.intval; | |
5e0848c6 | 265 | |
443cad92 DY |
266 | return 0; |
267 | } | |
268 | ||
269 | int power_supply_am_i_supplied(struct power_supply *psy) | |
270 | { | |
271 | int error; | |
272 | ||
93562b53 | 273 | error = class_for_each_device(power_supply_class, NULL, psy, |
443cad92 | 274 | __power_supply_am_i_supplied); |
4a11b59d | 275 | |
0cddc0a9 | 276 | dev_dbg(psy->dev, "%s %d\n", __func__, error); |
4a11b59d | 277 | |
443cad92 | 278 | return error; |
4a11b59d | 279 | } |
ff3417e7 | 280 | EXPORT_SYMBOL_GPL(power_supply_am_i_supplied); |
4a11b59d | 281 | |
942ed161 MG |
282 | static int __power_supply_is_system_supplied(struct device *dev, void *data) |
283 | { | |
284 | union power_supply_propval ret = {0,}; | |
285 | struct power_supply *psy = dev_get_drvdata(dev); | |
2530daa1 | 286 | unsigned int *count = data; |
942ed161 | 287 | |
2530daa1 | 288 | (*count)++; |
1c42a389 VK |
289 | if (psy->type != POWER_SUPPLY_TYPE_BATTERY) |
290 | if (!psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &ret)) | |
942ed161 | 291 | return ret.intval; |
1c42a389 | 292 | |
942ed161 MG |
293 | return 0; |
294 | } | |
295 | ||
296 | int power_supply_is_system_supplied(void) | |
297 | { | |
298 | int error; | |
2530daa1 | 299 | unsigned int count = 0; |
942ed161 | 300 | |
2530daa1 | 301 | error = class_for_each_device(power_supply_class, NULL, &count, |
942ed161 MG |
302 | __power_supply_is_system_supplied); |
303 | ||
2530daa1 JD |
304 | /* |
305 | * If no power class device was found at all, most probably we are | |
306 | * running on a desktop system, so assume we are on mains power. | |
307 | */ | |
308 | if (count == 0) | |
309 | return 1; | |
310 | ||
942ed161 MG |
311 | return error; |
312 | } | |
ff3417e7 | 313 | EXPORT_SYMBOL_GPL(power_supply_is_system_supplied); |
942ed161 | 314 | |
e5f5ccb6 DM |
315 | int power_supply_set_battery_charged(struct power_supply *psy) |
316 | { | |
317 | if (psy->type == POWER_SUPPLY_TYPE_BATTERY && psy->set_charged) { | |
318 | psy->set_charged(psy); | |
319 | return 0; | |
320 | } | |
321 | ||
322 | return -EINVAL; | |
323 | } | |
324 | EXPORT_SYMBOL_GPL(power_supply_set_battery_charged); | |
325 | ||
9f3b795a | 326 | static int power_supply_match_device_by_name(struct device *dev, const void *data) |
e5f5ccb6 DM |
327 | { |
328 | const char *name = data; | |
329 | struct power_supply *psy = dev_get_drvdata(dev); | |
330 | ||
331 | return strcmp(psy->name, name) == 0; | |
332 | } | |
333 | ||
9f3b795a | 334 | struct power_supply *power_supply_get_by_name(const char *name) |
e5f5ccb6 DM |
335 | { |
336 | struct device *dev = class_find_device(power_supply_class, NULL, name, | |
337 | power_supply_match_device_by_name); | |
338 | ||
339 | return dev ? dev_get_drvdata(dev) : NULL; | |
340 | } | |
341 | EXPORT_SYMBOL_GPL(power_supply_get_by_name); | |
342 | ||
abce9770 SR |
343 | #ifdef CONFIG_OF |
344 | static int power_supply_match_device_node(struct device *dev, const void *data) | |
345 | { | |
346 | return dev->parent && dev->parent->of_node == data; | |
347 | } | |
348 | ||
349 | struct power_supply *power_supply_get_by_phandle(struct device_node *np, | |
350 | const char *property) | |
351 | { | |
352 | struct device_node *power_supply_np; | |
353 | struct device *dev; | |
354 | ||
355 | power_supply_np = of_parse_phandle(np, property, 0); | |
356 | if (!power_supply_np) | |
357 | return ERR_PTR(-ENODEV); | |
358 | ||
359 | dev = class_find_device(power_supply_class, NULL, power_supply_np, | |
360 | power_supply_match_device_node); | |
361 | ||
362 | of_node_put(power_supply_np); | |
363 | ||
364 | return dev ? dev_get_drvdata(dev) : NULL; | |
365 | } | |
366 | EXPORT_SYMBOL_GPL(power_supply_get_by_phandle); | |
367 | #endif /* CONFIG_OF */ | |
368 | ||
83516651 JF |
369 | int power_supply_powers(struct power_supply *psy, struct device *dev) |
370 | { | |
93278d15 | 371 | return sysfs_create_link(&psy->dev->kobj, &dev->kobj, "powers"); |
83516651 JF |
372 | } |
373 | EXPORT_SYMBOL_GPL(power_supply_powers); | |
374 | ||
5f487cd3 AV |
375 | static void power_supply_dev_release(struct device *dev) |
376 | { | |
377 | pr_debug("device: '%s': %s\n", dev_name(dev), __func__); | |
378 | kfree(dev); | |
379 | } | |
380 | ||
d36240d2 PR |
381 | int power_supply_reg_notifier(struct notifier_block *nb) |
382 | { | |
383 | return atomic_notifier_chain_register(&power_supply_notifier, nb); | |
384 | } | |
385 | EXPORT_SYMBOL_GPL(power_supply_reg_notifier); | |
386 | ||
387 | void power_supply_unreg_notifier(struct notifier_block *nb) | |
388 | { | |
389 | atomic_notifier_chain_unregister(&power_supply_notifier, nb); | |
390 | } | |
391 | EXPORT_SYMBOL_GPL(power_supply_unreg_notifier); | |
392 | ||
3be330bf JT |
393 | #ifdef CONFIG_THERMAL |
394 | static int power_supply_read_temp(struct thermal_zone_device *tzd, | |
395 | unsigned long *temp) | |
396 | { | |
397 | struct power_supply *psy; | |
398 | union power_supply_propval val; | |
399 | int ret; | |
400 | ||
401 | WARN_ON(tzd == NULL); | |
402 | psy = tzd->devdata; | |
403 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_TEMP, &val); | |
404 | ||
405 | /* Convert tenths of degree Celsius to milli degree Celsius. */ | |
406 | if (!ret) | |
407 | *temp = val.intval * 100; | |
408 | ||
409 | return ret; | |
410 | } | |
411 | ||
412 | static struct thermal_zone_device_ops psy_tzd_ops = { | |
413 | .get_temp = power_supply_read_temp, | |
414 | }; | |
415 | ||
416 | static int psy_register_thermal(struct power_supply *psy) | |
417 | { | |
418 | int i; | |
419 | ||
420 | /* Register battery zone device psy reports temperature */ | |
421 | for (i = 0; i < psy->num_properties; i++) { | |
422 | if (psy->properties[i] == POWER_SUPPLY_PROP_TEMP) { | |
e6db06a5 | 423 | psy->tzd = thermal_zone_device_register(psy->name, 0, 0, |
50125a9b | 424 | psy, &psy_tzd_ops, NULL, 0, 0); |
9d2410c7 | 425 | return PTR_ERR_OR_ZERO(psy->tzd); |
3be330bf JT |
426 | } |
427 | } | |
428 | return 0; | |
429 | } | |
430 | ||
431 | static void psy_unregister_thermal(struct power_supply *psy) | |
432 | { | |
433 | if (IS_ERR_OR_NULL(psy->tzd)) | |
434 | return; | |
435 | thermal_zone_device_unregister(psy->tzd); | |
436 | } | |
952aeeb3 RP |
437 | |
438 | /* thermal cooling device callbacks */ | |
439 | static int ps_get_max_charge_cntl_limit(struct thermal_cooling_device *tcd, | |
440 | unsigned long *state) | |
441 | { | |
442 | struct power_supply *psy; | |
443 | union power_supply_propval val; | |
444 | int ret; | |
445 | ||
446 | psy = tcd->devdata; | |
447 | ret = psy->get_property(psy, | |
448 | POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX, &val); | |
449 | if (!ret) | |
450 | *state = val.intval; | |
451 | ||
452 | return ret; | |
453 | } | |
454 | ||
455 | static int ps_get_cur_chrage_cntl_limit(struct thermal_cooling_device *tcd, | |
456 | unsigned long *state) | |
457 | { | |
458 | struct power_supply *psy; | |
459 | union power_supply_propval val; | |
460 | int ret; | |
461 | ||
462 | psy = tcd->devdata; | |
463 | ret = psy->get_property(psy, | |
464 | POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, &val); | |
465 | if (!ret) | |
466 | *state = val.intval; | |
467 | ||
468 | return ret; | |
469 | } | |
470 | ||
471 | static int ps_set_cur_charge_cntl_limit(struct thermal_cooling_device *tcd, | |
472 | unsigned long state) | |
473 | { | |
474 | struct power_supply *psy; | |
475 | union power_supply_propval val; | |
476 | int ret; | |
477 | ||
478 | psy = tcd->devdata; | |
479 | val.intval = state; | |
480 | ret = psy->set_property(psy, | |
481 | POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, &val); | |
482 | ||
483 | return ret; | |
484 | } | |
485 | ||
486 | static struct thermal_cooling_device_ops psy_tcd_ops = { | |
487 | .get_max_state = ps_get_max_charge_cntl_limit, | |
488 | .get_cur_state = ps_get_cur_chrage_cntl_limit, | |
489 | .set_cur_state = ps_set_cur_charge_cntl_limit, | |
490 | }; | |
491 | ||
492 | static int psy_register_cooler(struct power_supply *psy) | |
493 | { | |
494 | int i; | |
495 | ||
496 | /* Register for cooling device if psy can control charging */ | |
497 | for (i = 0; i < psy->num_properties; i++) { | |
498 | if (psy->properties[i] == | |
499 | POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT) { | |
500 | psy->tcd = thermal_cooling_device_register( | |
501 | (char *)psy->name, | |
502 | psy, &psy_tcd_ops); | |
9d2410c7 | 503 | return PTR_ERR_OR_ZERO(psy->tcd); |
952aeeb3 RP |
504 | } |
505 | } | |
506 | return 0; | |
507 | } | |
508 | ||
509 | static void psy_unregister_cooler(struct power_supply *psy) | |
510 | { | |
511 | if (IS_ERR_OR_NULL(psy->tcd)) | |
512 | return; | |
513 | thermal_cooling_device_unregister(psy->tcd); | |
514 | } | |
3be330bf JT |
515 | #else |
516 | static int psy_register_thermal(struct power_supply *psy) | |
517 | { | |
518 | return 0; | |
519 | } | |
520 | ||
521 | static void psy_unregister_thermal(struct power_supply *psy) | |
522 | { | |
523 | } | |
952aeeb3 RP |
524 | |
525 | static int psy_register_cooler(struct power_supply *psy) | |
526 | { | |
527 | return 0; | |
528 | } | |
529 | ||
530 | static void psy_unregister_cooler(struct power_supply *psy) | |
531 | { | |
532 | } | |
3be330bf JT |
533 | #endif |
534 | ||
c128d397 WY |
535 | static int __power_supply_register(struct device *parent, |
536 | struct power_supply *psy, bool ws) | |
4a11b59d | 537 | { |
5f487cd3 AV |
538 | struct device *dev; |
539 | int rc; | |
4a11b59d | 540 | |
5f487cd3 AV |
541 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
542 | if (!dev) | |
543 | return -ENOMEM; | |
4a11b59d | 544 | |
5f487cd3 | 545 | device_initialize(dev); |
4a11b59d | 546 | |
5f487cd3 AV |
547 | dev->class = power_supply_class; |
548 | dev->type = &power_supply_dev_type; | |
549 | dev->parent = parent; | |
550 | dev->release = power_supply_dev_release; | |
551 | dev_set_drvdata(dev, psy); | |
552 | psy->dev = dev; | |
553 | ||
80c6463e SK |
554 | rc = dev_set_name(dev, "%s", psy->name); |
555 | if (rc) | |
556 | goto dev_set_name_failed; | |
557 | ||
97774672 LPC |
558 | INIT_WORK(&psy->changed_work, power_supply_changed_work); |
559 | ||
f6e0b081 RK |
560 | rc = power_supply_check_supplies(psy); |
561 | if (rc) { | |
562 | dev_info(dev, "Not all required supplies found, defer probe\n"); | |
563 | goto check_supplies_failed; | |
564 | } | |
565 | ||
948dcf96 | 566 | spin_lock_init(&psy->changed_lock); |
9113e260 | 567 | rc = device_init_wakeup(dev, ws); |
948dcf96 ZM |
568 | if (rc) |
569 | goto wakeup_init_failed; | |
570 | ||
5f487cd3 | 571 | rc = device_add(dev); |
4a11b59d | 572 | if (rc) |
5f487cd3 AV |
573 | goto device_add_failed; |
574 | ||
3be330bf JT |
575 | rc = psy_register_thermal(psy); |
576 | if (rc) | |
577 | goto register_thermal_failed; | |
578 | ||
952aeeb3 RP |
579 | rc = psy_register_cooler(psy); |
580 | if (rc) | |
581 | goto register_cooler_failed; | |
582 | ||
4a11b59d AV |
583 | rc = power_supply_create_triggers(psy); |
584 | if (rc) | |
585 | goto create_triggers_failed; | |
586 | ||
587 | power_supply_changed(psy); | |
588 | ||
464069ca | 589 | return 0; |
4a11b59d AV |
590 | |
591 | create_triggers_failed: | |
952aeeb3 RP |
592 | psy_unregister_cooler(psy); |
593 | register_cooler_failed: | |
3be330bf JT |
594 | psy_unregister_thermal(psy); |
595 | register_thermal_failed: | |
3a2dbd61 | 596 | device_del(dev); |
5f487cd3 | 597 | device_add_failed: |
80c6463e | 598 | wakeup_init_failed: |
f6e0b081 | 599 | check_supplies_failed: |
80c6463e | 600 | dev_set_name_failed: |
3a2dbd61 | 601 | put_device(dev); |
4a11b59d AV |
602 | return rc; |
603 | } | |
9113e260 ZR |
604 | |
605 | int power_supply_register(struct device *parent, struct power_supply *psy) | |
606 | { | |
607 | return __power_supply_register(parent, psy, true); | |
608 | } | |
ff3417e7 | 609 | EXPORT_SYMBOL_GPL(power_supply_register); |
4a11b59d | 610 | |
9113e260 ZR |
611 | int power_supply_register_no_ws(struct device *parent, struct power_supply *psy) |
612 | { | |
613 | return __power_supply_register(parent, psy, false); | |
614 | } | |
615 | EXPORT_SYMBOL_GPL(power_supply_register_no_ws); | |
616 | ||
4a11b59d AV |
617 | void power_supply_unregister(struct power_supply *psy) |
618 | { | |
bc51e7ff | 619 | cancel_work_sync(&psy->changed_work); |
83516651 | 620 | sysfs_remove_link(&psy->dev->kobj, "powers"); |
4a11b59d | 621 | power_supply_remove_triggers(psy); |
952aeeb3 | 622 | psy_unregister_cooler(psy); |
3be330bf | 623 | psy_unregister_thermal(psy); |
948dcf96 | 624 | device_init_wakeup(psy->dev, false); |
4a11b59d | 625 | device_unregister(psy->dev); |
4a11b59d | 626 | } |
ff3417e7 | 627 | EXPORT_SYMBOL_GPL(power_supply_unregister); |
4a11b59d AV |
628 | |
629 | static int __init power_supply_class_init(void) | |
630 | { | |
631 | power_supply_class = class_create(THIS_MODULE, "power_supply"); | |
632 | ||
633 | if (IS_ERR(power_supply_class)) | |
634 | return PTR_ERR(power_supply_class); | |
635 | ||
636 | power_supply_class->dev_uevent = power_supply_uevent; | |
5f487cd3 | 637 | power_supply_init_attrs(&power_supply_dev_type); |
4a11b59d AV |
638 | |
639 | return 0; | |
640 | } | |
641 | ||
642 | static void __exit power_supply_class_exit(void) | |
643 | { | |
644 | class_destroy(power_supply_class); | |
4a11b59d AV |
645 | } |
646 | ||
4a11b59d AV |
647 | subsys_initcall(power_supply_class_init); |
648 | module_exit(power_supply_class_exit); | |
649 | ||
650 | MODULE_DESCRIPTION("Universal power supply monitor class"); | |
651 | MODULE_AUTHOR("Ian Molton <spyro@f2s.com>, " | |
652 | "Szabolcs Gyurko, " | |
653 | "Anton Vorontsov <cbou@mail.ru>"); | |
654 | MODULE_LICENSE("GPL"); |