Commit | Line | Data |
---|---|---|
3bb3dbbd DK |
1 | /* |
2 | * Copyright (C) 2011 Samsung Electronics Co., Ltd. | |
3 | * MyungJoo Ham <myungjoo.ham@samsung.com> | |
4 | * | |
5 | * This driver enables to monitor battery health and control charger | |
6 | * during suspend-to-mem. | |
7 | * Charger manager depends on other devices. register this later than | |
8 | * the depending devices. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | **/ | |
14 | ||
e5409cbd JP |
15 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
16 | ||
3bb3dbbd DK |
17 | #include <linux/io.h> |
18 | #include <linux/module.h> | |
19 | #include <linux/irq.h> | |
20 | #include <linux/interrupt.h> | |
21 | #include <linux/rtc.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/workqueue.h> | |
24 | #include <linux/platform_device.h> | |
25 | #include <linux/power/charger-manager.h> | |
26 | #include <linux/regulator/consumer.h> | |
3950c786 | 27 | #include <linux/sysfs.h> |
856ee611 | 28 | #include <linux/of.h> |
5c49a625 JL |
29 | #include <linux/thermal.h> |
30 | ||
31 | /* | |
32 | * Default termperature threshold for charging. | |
33 | * Every temperature units are in tenth of centigrade. | |
34 | */ | |
35 | #define CM_DEFAULT_RECHARGE_TEMP_DIFF 50 | |
36 | #define CM_DEFAULT_CHARGE_TEMP_MAX 500 | |
3bb3dbbd | 37 | |
dfeccb12 CC |
38 | static const char * const default_event_names[] = { |
39 | [CM_EVENT_UNKNOWN] = "Unknown", | |
40 | [CM_EVENT_BATT_FULL] = "Battery Full", | |
41 | [CM_EVENT_BATT_IN] = "Battery Inserted", | |
42 | [CM_EVENT_BATT_OUT] = "Battery Pulled Out", | |
5c49a625 JL |
43 | [CM_EVENT_BATT_OVERHEAT] = "Battery Overheat", |
44 | [CM_EVENT_BATT_COLD] = "Battery Cold", | |
dfeccb12 CC |
45 | [CM_EVENT_EXT_PWR_IN_OUT] = "External Power Attach/Detach", |
46 | [CM_EVENT_CHG_START_STOP] = "Charging Start/Stop", | |
47 | [CM_EVENT_OTHERS] = "Other battery events" | |
48 | }; | |
49 | ||
3bb3dbbd DK |
50 | /* |
51 | * Regard CM_JIFFIES_SMALL jiffies is small enough to ignore for | |
52 | * delayed works so that we can run delayed works with CM_JIFFIES_SMALL | |
53 | * without any delays. | |
54 | */ | |
55 | #define CM_JIFFIES_SMALL (2) | |
56 | ||
57 | /* If y is valid (> 0) and smaller than x, do x = y */ | |
58 | #define CM_MIN_VALID(x, y) x = (((y > 0) && ((x) > (y))) ? (y) : (x)) | |
59 | ||
60 | /* | |
61 | * Regard CM_RTC_SMALL (sec) is small enough to ignore error in invoking | |
62 | * rtc alarm. It should be 2 or larger | |
63 | */ | |
64 | #define CM_RTC_SMALL (2) | |
65 | ||
66 | #define UEVENT_BUF_SIZE 32 | |
67 | ||
68 | static LIST_HEAD(cm_list); | |
69 | static DEFINE_MUTEX(cm_list_mtx); | |
70 | ||
71 | /* About in-suspend (suspend-again) monitoring */ | |
72 | static struct rtc_device *rtc_dev; | |
73 | /* | |
74 | * Backup RTC alarm | |
75 | * Save the wakeup alarm before entering suspend-to-RAM | |
76 | */ | |
77 | static struct rtc_wkalrm rtc_wkalarm_save; | |
78 | /* Backup RTC alarm time in terms of seconds since 01-01-1970 00:00:00 */ | |
79 | static unsigned long rtc_wkalarm_save_time; | |
80 | static bool cm_suspended; | |
81 | static bool cm_rtc_set; | |
82 | static unsigned long cm_suspend_duration_ms; | |
83 | ||
d829dc75 CC |
84 | /* About normal (not suspended) monitoring */ |
85 | static unsigned long polling_jiffy = ULONG_MAX; /* ULONG_MAX: no polling */ | |
86 | static unsigned long next_polling; /* Next appointed polling time */ | |
87 | static struct workqueue_struct *cm_wq; /* init at driver add */ | |
88 | static struct delayed_work cm_monitor_work; /* init at driver add */ | |
89 | ||
3bb3dbbd DK |
90 | /* Global charger-manager description */ |
91 | static struct charger_global_desc *g_desc; /* init with setup_charger_manager */ | |
92 | ||
93 | /** | |
94 | * is_batt_present - See if the battery presents in place. | |
95 | * @cm: the Charger Manager representing the battery. | |
96 | */ | |
97 | static bool is_batt_present(struct charger_manager *cm) | |
98 | { | |
99 | union power_supply_propval val; | |
bdbe8144 | 100 | struct power_supply *psy; |
3bb3dbbd DK |
101 | bool present = false; |
102 | int i, ret; | |
103 | ||
104 | switch (cm->desc->battery_present) { | |
d829dc75 CC |
105 | case CM_BATTERY_PRESENT: |
106 | present = true; | |
107 | break; | |
108 | case CM_NO_BATTERY: | |
109 | break; | |
3bb3dbbd | 110 | case CM_FUEL_GAUGE: |
bdbe8144 KK |
111 | psy = power_supply_get_by_name(cm->desc->psy_fuel_gauge); |
112 | if (!psy) | |
113 | break; | |
114 | ||
115 | ret = psy->get_property(psy, | |
3bb3dbbd DK |
116 | POWER_SUPPLY_PROP_PRESENT, &val); |
117 | if (ret == 0 && val.intval) | |
118 | present = true; | |
119 | break; | |
120 | case CM_CHARGER_STAT: | |
cdaf3e15 KK |
121 | for (i = 0; cm->desc->psy_charger_stat[i]; i++) { |
122 | psy = power_supply_get_by_name( | |
123 | cm->desc->psy_charger_stat[i]); | |
124 | if (!psy) { | |
125 | dev_err(cm->dev, "Cannot find power supply \"%s\"\n", | |
126 | cm->desc->psy_charger_stat[i]); | |
127 | continue; | |
128 | } | |
129 | ||
130 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_PRESENT, | |
131 | &val); | |
3bb3dbbd DK |
132 | if (ret == 0 && val.intval) { |
133 | present = true; | |
134 | break; | |
135 | } | |
136 | } | |
137 | break; | |
138 | } | |
139 | ||
140 | return present; | |
141 | } | |
142 | ||
143 | /** | |
144 | * is_ext_pwr_online - See if an external power source is attached to charge | |
145 | * @cm: the Charger Manager representing the battery. | |
146 | * | |
147 | * Returns true if at least one of the chargers of the battery has an external | |
148 | * power source attached to charge the battery regardless of whether it is | |
149 | * actually charging or not. | |
150 | */ | |
151 | static bool is_ext_pwr_online(struct charger_manager *cm) | |
152 | { | |
153 | union power_supply_propval val; | |
cdaf3e15 | 154 | struct power_supply *psy; |
3bb3dbbd DK |
155 | bool online = false; |
156 | int i, ret; | |
157 | ||
158 | /* If at least one of them has one, it's yes. */ | |
cdaf3e15 KK |
159 | for (i = 0; cm->desc->psy_charger_stat[i]; i++) { |
160 | psy = power_supply_get_by_name(cm->desc->psy_charger_stat[i]); | |
161 | if (!psy) { | |
162 | dev_err(cm->dev, "Cannot find power supply \"%s\"\n", | |
163 | cm->desc->psy_charger_stat[i]); | |
164 | continue; | |
165 | } | |
166 | ||
167 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &val); | |
3bb3dbbd DK |
168 | if (ret == 0 && val.intval) { |
169 | online = true; | |
170 | break; | |
171 | } | |
172 | } | |
173 | ||
174 | return online; | |
175 | } | |
176 | ||
ad3d13ee DK |
177 | /** |
178 | * get_batt_uV - Get the voltage level of the battery | |
179 | * @cm: the Charger Manager representing the battery. | |
180 | * @uV: the voltage level returned. | |
181 | * | |
182 | * Returns 0 if there is no error. | |
183 | * Returns a negative value on error. | |
184 | */ | |
185 | static int get_batt_uV(struct charger_manager *cm, int *uV) | |
186 | { | |
187 | union power_supply_propval val; | |
bdbe8144 | 188 | struct power_supply *fuel_gauge; |
ad3d13ee DK |
189 | int ret; |
190 | ||
bdbe8144 KK |
191 | fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge); |
192 | if (!fuel_gauge) | |
ad3d13ee DK |
193 | return -ENODEV; |
194 | ||
bdbe8144 | 195 | ret = fuel_gauge->get_property(fuel_gauge, |
bb2a95c2 | 196 | POWER_SUPPLY_PROP_VOLTAGE_NOW, &val); |
ad3d13ee DK |
197 | if (ret) |
198 | return ret; | |
199 | ||
200 | *uV = val.intval; | |
201 | return 0; | |
202 | } | |
203 | ||
3bb3dbbd DK |
204 | /** |
205 | * is_charging - Returns true if the battery is being charged. | |
206 | * @cm: the Charger Manager representing the battery. | |
207 | */ | |
208 | static bool is_charging(struct charger_manager *cm) | |
209 | { | |
210 | int i, ret; | |
211 | bool charging = false; | |
cdaf3e15 | 212 | struct power_supply *psy; |
3bb3dbbd DK |
213 | union power_supply_propval val; |
214 | ||
215 | /* If there is no battery, it cannot be charged */ | |
216 | if (!is_batt_present(cm)) | |
217 | return false; | |
218 | ||
219 | /* If at least one of the charger is charging, return yes */ | |
cdaf3e15 | 220 | for (i = 0; cm->desc->psy_charger_stat[i]; i++) { |
3bb3dbbd DK |
221 | /* 1. The charger sholuld not be DISABLED */ |
222 | if (cm->emergency_stop) | |
223 | continue; | |
224 | if (!cm->charger_enabled) | |
225 | continue; | |
226 | ||
cdaf3e15 KK |
227 | psy = power_supply_get_by_name(cm->desc->psy_charger_stat[i]); |
228 | if (!psy) { | |
229 | dev_err(cm->dev, "Cannot find power supply \"%s\"\n", | |
230 | cm->desc->psy_charger_stat[i]); | |
231 | continue; | |
232 | } | |
233 | ||
3bb3dbbd | 234 | /* 2. The charger should be online (ext-power) */ |
cdaf3e15 | 235 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &val); |
3bb3dbbd | 236 | if (ret) { |
e5409cbd JP |
237 | dev_warn(cm->dev, "Cannot read ONLINE value from %s\n", |
238 | cm->desc->psy_charger_stat[i]); | |
3bb3dbbd DK |
239 | continue; |
240 | } | |
241 | if (val.intval == 0) | |
242 | continue; | |
243 | ||
244 | /* | |
245 | * 3. The charger should not be FULL, DISCHARGING, | |
246 | * or NOT_CHARGING. | |
247 | */ | |
cdaf3e15 | 248 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &val); |
3bb3dbbd | 249 | if (ret) { |
e5409cbd JP |
250 | dev_warn(cm->dev, "Cannot read STATUS value from %s\n", |
251 | cm->desc->psy_charger_stat[i]); | |
3bb3dbbd DK |
252 | continue; |
253 | } | |
254 | if (val.intval == POWER_SUPPLY_STATUS_FULL || | |
255 | val.intval == POWER_SUPPLY_STATUS_DISCHARGING || | |
256 | val.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) | |
257 | continue; | |
258 | ||
259 | /* Then, this is charging. */ | |
260 | charging = true; | |
261 | break; | |
262 | } | |
263 | ||
264 | return charging; | |
265 | } | |
266 | ||
2ed9e9b6 CC |
267 | /** |
268 | * is_full_charged - Returns true if the battery is fully charged. | |
269 | * @cm: the Charger Manager representing the battery. | |
270 | */ | |
271 | static bool is_full_charged(struct charger_manager *cm) | |
272 | { | |
273 | struct charger_desc *desc = cm->desc; | |
274 | union power_supply_propval val; | |
bdbe8144 | 275 | struct power_supply *fuel_gauge; |
2ed9e9b6 CC |
276 | int ret = 0; |
277 | int uV; | |
278 | ||
279 | /* If there is no battery, it cannot be charged */ | |
0fa11dbc CC |
280 | if (!is_batt_present(cm)) |
281 | return false; | |
2ed9e9b6 | 282 | |
bdbe8144 KK |
283 | fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge); |
284 | if (!fuel_gauge) | |
285 | return false; | |
286 | ||
287 | if (desc->fullbatt_full_capacity > 0) { | |
0fa11dbc CC |
288 | val.intval = 0; |
289 | ||
2ed9e9b6 | 290 | /* Not full if capacity of fuel gauge isn't full */ |
bdbe8144 | 291 | ret = fuel_gauge->get_property(fuel_gauge, |
2ed9e9b6 | 292 | POWER_SUPPLY_PROP_CHARGE_FULL, &val); |
0fa11dbc CC |
293 | if (!ret && val.intval > desc->fullbatt_full_capacity) |
294 | return true; | |
2ed9e9b6 CC |
295 | } |
296 | ||
297 | /* Full, if it's over the fullbatt voltage */ | |
298 | if (desc->fullbatt_uV > 0) { | |
299 | ret = get_batt_uV(cm, &uV); | |
0fa11dbc CC |
300 | if (!ret && uV >= desc->fullbatt_uV) |
301 | return true; | |
2ed9e9b6 CC |
302 | } |
303 | ||
304 | /* Full, if the capacity is more than fullbatt_soc */ | |
bdbe8144 | 305 | if (desc->fullbatt_soc > 0) { |
0fa11dbc CC |
306 | val.intval = 0; |
307 | ||
bdbe8144 | 308 | ret = fuel_gauge->get_property(fuel_gauge, |
2ed9e9b6 | 309 | POWER_SUPPLY_PROP_CAPACITY, &val); |
0fa11dbc CC |
310 | if (!ret && val.intval >= desc->fullbatt_soc) |
311 | return true; | |
2ed9e9b6 CC |
312 | } |
313 | ||
0fa11dbc | 314 | return false; |
2ed9e9b6 CC |
315 | } |
316 | ||
3bb3dbbd DK |
317 | /** |
318 | * is_polling_required - Return true if need to continue polling for this CM. | |
319 | * @cm: the Charger Manager representing the battery. | |
320 | */ | |
321 | static bool is_polling_required(struct charger_manager *cm) | |
322 | { | |
323 | switch (cm->desc->polling_mode) { | |
324 | case CM_POLL_DISABLE: | |
325 | return false; | |
326 | case CM_POLL_ALWAYS: | |
327 | return true; | |
328 | case CM_POLL_EXTERNAL_POWER_ONLY: | |
329 | return is_ext_pwr_online(cm); | |
330 | case CM_POLL_CHARGING_ONLY: | |
331 | return is_charging(cm); | |
332 | default: | |
333 | dev_warn(cm->dev, "Incorrect polling_mode (%d)\n", | |
e5409cbd | 334 | cm->desc->polling_mode); |
3bb3dbbd DK |
335 | } |
336 | ||
337 | return false; | |
338 | } | |
339 | ||
340 | /** | |
341 | * try_charger_enable - Enable/Disable chargers altogether | |
342 | * @cm: the Charger Manager representing the battery. | |
343 | * @enable: true: enable / false: disable | |
344 | * | |
345 | * Note that Charger Manager keeps the charger enabled regardless whether | |
346 | * the charger is charging or not (because battery is full or no external | |
347 | * power source exists) except when CM needs to disable chargers forcibly | |
348 | * bacause of emergency causes; when the battery is overheated or too cold. | |
349 | */ | |
350 | static int try_charger_enable(struct charger_manager *cm, bool enable) | |
351 | { | |
352 | int err = 0, i; | |
353 | struct charger_desc *desc = cm->desc; | |
354 | ||
355 | /* Ignore if it's redundent command */ | |
bb2a95c2 | 356 | if (enable == cm->charger_enabled) |
3bb3dbbd DK |
357 | return 0; |
358 | ||
359 | if (enable) { | |
360 | if (cm->emergency_stop) | |
361 | return -EAGAIN; | |
8fcfe088 CC |
362 | |
363 | /* | |
364 | * Save start time of charging to limit | |
365 | * maximum possible charging time. | |
366 | */ | |
367 | cm->charging_start_time = ktime_to_ms(ktime_get()); | |
368 | cm->charging_end_time = 0; | |
369 | ||
dbb61fc7 | 370 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
3950c786 CC |
371 | if (desc->charger_regulators[i].externally_control) |
372 | continue; | |
373 | ||
dbb61fc7 CC |
374 | err = regulator_enable(desc->charger_regulators[i].consumer); |
375 | if (err < 0) { | |
e5409cbd JP |
376 | dev_warn(cm->dev, "Cannot enable %s regulator\n", |
377 | desc->charger_regulators[i].regulator_name); | |
dbb61fc7 CC |
378 | } |
379 | } | |
3bb3dbbd | 380 | } else { |
8fcfe088 CC |
381 | /* |
382 | * Save end time of charging to maintain fully charged state | |
383 | * of battery after full-batt. | |
384 | */ | |
385 | cm->charging_start_time = 0; | |
386 | cm->charging_end_time = ktime_to_ms(ktime_get()); | |
387 | ||
dbb61fc7 | 388 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
3950c786 CC |
389 | if (desc->charger_regulators[i].externally_control) |
390 | continue; | |
391 | ||
dbb61fc7 CC |
392 | err = regulator_disable(desc->charger_regulators[i].consumer); |
393 | if (err < 0) { | |
e5409cbd JP |
394 | dev_warn(cm->dev, "Cannot disable %s regulator\n", |
395 | desc->charger_regulators[i].regulator_name); | |
dbb61fc7 CC |
396 | } |
397 | } | |
398 | ||
3bb3dbbd DK |
399 | /* |
400 | * Abnormal battery state - Stop charging forcibly, | |
401 | * even if charger was enabled at the other places | |
402 | */ | |
3bb3dbbd DK |
403 | for (i = 0; i < desc->num_charger_regulators; i++) { |
404 | if (regulator_is_enabled( | |
405 | desc->charger_regulators[i].consumer)) { | |
406 | regulator_force_disable( | |
407 | desc->charger_regulators[i].consumer); | |
e5409cbd JP |
408 | dev_warn(cm->dev, "Disable regulator(%s) forcibly\n", |
409 | desc->charger_regulators[i].regulator_name); | |
3bb3dbbd DK |
410 | } |
411 | } | |
412 | } | |
413 | ||
414 | if (!err) | |
415 | cm->charger_enabled = enable; | |
416 | ||
417 | return err; | |
418 | } | |
419 | ||
d829dc75 CC |
420 | /** |
421 | * try_charger_restart - Restart charging. | |
422 | * @cm: the Charger Manager representing the battery. | |
423 | * | |
424 | * Restart charging by turning off and on the charger. | |
425 | */ | |
426 | static int try_charger_restart(struct charger_manager *cm) | |
427 | { | |
428 | int err; | |
429 | ||
430 | if (cm->emergency_stop) | |
431 | return -EAGAIN; | |
432 | ||
433 | err = try_charger_enable(cm, false); | |
434 | if (err) | |
435 | return err; | |
436 | ||
437 | return try_charger_enable(cm, true); | |
438 | } | |
439 | ||
3bb3dbbd DK |
440 | /** |
441 | * uevent_notify - Let users know something has changed. | |
442 | * @cm: the Charger Manager representing the battery. | |
443 | * @event: the event string. | |
444 | * | |
445 | * If @event is null, it implies that uevent_notify is called | |
446 | * by resume function. When called in the resume function, cm_suspended | |
447 | * should be already reset to false in order to let uevent_notify | |
448 | * notify the recent event during the suspend to users. While | |
449 | * suspended, uevent_notify does not notify users, but tracks | |
450 | * events so that uevent_notify can notify users later after resumed. | |
451 | */ | |
452 | static void uevent_notify(struct charger_manager *cm, const char *event) | |
453 | { | |
454 | static char env_str[UEVENT_BUF_SIZE + 1] = ""; | |
455 | static char env_str_save[UEVENT_BUF_SIZE + 1] = ""; | |
456 | ||
457 | if (cm_suspended) { | |
458 | /* Nothing in suspended-event buffer */ | |
459 | if (env_str_save[0] == 0) { | |
460 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
461 | return; /* status not changed */ | |
462 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); | |
463 | return; | |
464 | } | |
465 | ||
466 | if (!strncmp(env_str_save, event, UEVENT_BUF_SIZE)) | |
467 | return; /* Duplicated. */ | |
bb2a95c2 | 468 | strncpy(env_str_save, event, UEVENT_BUF_SIZE); |
3bb3dbbd DK |
469 | return; |
470 | } | |
471 | ||
472 | if (event == NULL) { | |
473 | /* No messages pending */ | |
474 | if (!env_str_save[0]) | |
475 | return; | |
476 | ||
477 | strncpy(env_str, env_str_save, UEVENT_BUF_SIZE); | |
478 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
479 | env_str_save[0] = 0; | |
480 | ||
481 | return; | |
482 | } | |
483 | ||
484 | /* status not changed */ | |
485 | if (!strncmp(env_str, event, UEVENT_BUF_SIZE)) | |
486 | return; | |
487 | ||
488 | /* save the status and notify the update */ | |
489 | strncpy(env_str, event, UEVENT_BUF_SIZE); | |
490 | kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE); | |
491 | ||
e5409cbd | 492 | dev_info(cm->dev, "%s\n", event); |
3bb3dbbd DK |
493 | } |
494 | ||
d829dc75 CC |
495 | /** |
496 | * fullbatt_vchk - Check voltage drop some times after "FULL" event. | |
497 | * @work: the work_struct appointing the function | |
498 | * | |
499 | * If a user has designated "fullbatt_vchkdrop_ms/uV" values with | |
500 | * charger_desc, Charger Manager checks voltage drop after the battery | |
501 | * "FULL" event. It checks whether the voltage has dropped more than | |
502 | * fullbatt_vchkdrop_uV by calling this function after fullbatt_vchkrop_ms. | |
503 | */ | |
504 | static void fullbatt_vchk(struct work_struct *work) | |
505 | { | |
506 | struct delayed_work *dwork = to_delayed_work(work); | |
507 | struct charger_manager *cm = container_of(dwork, | |
508 | struct charger_manager, fullbatt_vchk_work); | |
509 | struct charger_desc *desc = cm->desc; | |
510 | int batt_uV, err, diff; | |
511 | ||
512 | /* remove the appointment for fullbatt_vchk */ | |
513 | cm->fullbatt_vchk_jiffies_at = 0; | |
514 | ||
515 | if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms) | |
516 | return; | |
517 | ||
518 | err = get_batt_uV(cm, &batt_uV); | |
519 | if (err) { | |
e5409cbd | 520 | dev_err(cm->dev, "%s: get_batt_uV error(%d)\n", __func__, err); |
d829dc75 CC |
521 | return; |
522 | } | |
523 | ||
f36b9ddb CC |
524 | diff = desc->fullbatt_uV - batt_uV; |
525 | if (diff < 0) | |
526 | return; | |
d829dc75 | 527 | |
e5409cbd | 528 | dev_info(cm->dev, "VBATT dropped %duV after full-batt\n", diff); |
d829dc75 CC |
529 | |
530 | if (diff > desc->fullbatt_vchkdrop_uV) { | |
531 | try_charger_restart(cm); | |
8fcfe088 CC |
532 | uevent_notify(cm, "Recharging"); |
533 | } | |
534 | } | |
535 | ||
536 | /** | |
537 | * check_charging_duration - Monitor charging/discharging duration | |
538 | * @cm: the Charger Manager representing the battery. | |
539 | * | |
540 | * If whole charging duration exceed 'charging_max_duration_ms', | |
541 | * cm stop charging to prevent overcharge/overheat. If discharging | |
542 | * duration exceed 'discharging _max_duration_ms', charger cable is | |
543 | * attached, after full-batt, cm start charging to maintain fully | |
544 | * charged state for battery. | |
545 | */ | |
546 | static int check_charging_duration(struct charger_manager *cm) | |
547 | { | |
548 | struct charger_desc *desc = cm->desc; | |
549 | u64 curr = ktime_to_ms(ktime_get()); | |
550 | u64 duration; | |
551 | int ret = false; | |
552 | ||
553 | if (!desc->charging_max_duration_ms && | |
554 | !desc->discharging_max_duration_ms) | |
555 | return ret; | |
556 | ||
557 | if (cm->charger_enabled) { | |
558 | duration = curr - cm->charging_start_time; | |
559 | ||
560 | if (duration > desc->charging_max_duration_ms) { | |
856ee611 | 561 | dev_info(cm->dev, "Charging duration exceed %ums\n", |
8fcfe088 CC |
562 | desc->charging_max_duration_ms); |
563 | uevent_notify(cm, "Discharging"); | |
564 | try_charger_enable(cm, false); | |
565 | ret = true; | |
566 | } | |
567 | } else if (is_ext_pwr_online(cm) && !cm->charger_enabled) { | |
568 | duration = curr - cm->charging_end_time; | |
569 | ||
570 | if (duration > desc->charging_max_duration_ms && | |
571 | is_ext_pwr_online(cm)) { | |
856ee611 | 572 | dev_info(cm->dev, "Discharging duration exceed %ums\n", |
8fcfe088 | 573 | desc->discharging_max_duration_ms); |
e5409cbd | 574 | uevent_notify(cm, "Recharging"); |
8fcfe088 CC |
575 | try_charger_enable(cm, true); |
576 | ret = true; | |
577 | } | |
d829dc75 | 578 | } |
8fcfe088 CC |
579 | |
580 | return ret; | |
d829dc75 CC |
581 | } |
582 | ||
bdbe8144 KK |
583 | static int cm_get_battery_temperature_by_psy(struct charger_manager *cm, |
584 | int *temp) | |
585 | { | |
586 | struct power_supply *fuel_gauge; | |
587 | ||
588 | fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge); | |
589 | if (!fuel_gauge) | |
590 | return -ENODEV; | |
591 | ||
592 | return fuel_gauge->get_property(fuel_gauge, | |
593 | POWER_SUPPLY_PROP_TEMP, | |
594 | (union power_supply_propval *)temp); | |
595 | } | |
596 | ||
5c49a625 JL |
597 | static int cm_get_battery_temperature(struct charger_manager *cm, |
598 | int *temp) | |
599 | { | |
600 | int ret; | |
601 | ||
602 | if (!cm->desc->measure_battery_temp) | |
603 | return -ENODEV; | |
604 | ||
605 | #ifdef CONFIG_THERMAL | |
bdbe8144 KK |
606 | if (cm->tzd_batt) { |
607 | ret = thermal_zone_get_temp(cm->tzd_batt, (unsigned long *)temp); | |
608 | if (!ret) | |
609 | /* Calibrate temperature unit */ | |
610 | *temp /= 100; | |
611 | } else | |
5c49a625 | 612 | #endif |
bdbe8144 KK |
613 | { |
614 | /* if-else continued from CONFIG_THERMAL */ | |
615 | ret = cm_get_battery_temperature_by_psy(cm, temp); | |
616 | } | |
617 | ||
5c49a625 JL |
618 | return ret; |
619 | } | |
620 | ||
621 | static int cm_check_thermal_status(struct charger_manager *cm) | |
622 | { | |
623 | struct charger_desc *desc = cm->desc; | |
624 | int temp, upper_limit, lower_limit; | |
625 | int ret = 0; | |
626 | ||
627 | ret = cm_get_battery_temperature(cm, &temp); | |
628 | if (ret) { | |
629 | /* FIXME: | |
630 | * No information of battery temperature might | |
631 | * occur hazadous result. We have to handle it | |
632 | * depending on battery type. | |
633 | */ | |
634 | dev_err(cm->dev, "Failed to get battery temperature\n"); | |
635 | return 0; | |
636 | } | |
637 | ||
638 | upper_limit = desc->temp_max; | |
639 | lower_limit = desc->temp_min; | |
640 | ||
641 | if (cm->emergency_stop) { | |
642 | upper_limit -= desc->temp_diff; | |
643 | lower_limit += desc->temp_diff; | |
644 | } | |
645 | ||
646 | if (temp > upper_limit) | |
647 | ret = CM_EVENT_BATT_OVERHEAT; | |
648 | else if (temp < lower_limit) | |
649 | ret = CM_EVENT_BATT_COLD; | |
650 | ||
651 | return ret; | |
652 | } | |
653 | ||
3bb3dbbd DK |
654 | /** |
655 | * _cm_monitor - Monitor the temperature and return true for exceptions. | |
656 | * @cm: the Charger Manager representing the battery. | |
657 | * | |
658 | * Returns true if there is an event to notify for the battery. | |
659 | * (True if the status of "emergency_stop" changes) | |
660 | */ | |
661 | static bool _cm_monitor(struct charger_manager *cm) | |
662 | { | |
5c49a625 | 663 | int temp_alrt; |
3bb3dbbd | 664 | |
5c49a625 | 665 | temp_alrt = cm_check_thermal_status(cm); |
3bb3dbbd | 666 | |
2ed9e9b6 | 667 | /* It has been stopped already */ |
5c49a625 | 668 | if (temp_alrt && cm->emergency_stop) |
3bb3dbbd DK |
669 | return false; |
670 | ||
2ed9e9b6 CC |
671 | /* |
672 | * Check temperature whether overheat or cold. | |
673 | * If temperature is out of range normal state, stop charging. | |
674 | */ | |
5c49a625 JL |
675 | if (temp_alrt) { |
676 | cm->emergency_stop = temp_alrt; | |
677 | if (!try_charger_enable(cm, false)) | |
678 | uevent_notify(cm, default_event_names[temp_alrt]); | |
2ed9e9b6 | 679 | |
8fcfe088 CC |
680 | /* |
681 | * Check whole charging duration and discharing duration | |
682 | * after full-batt. | |
683 | */ | |
684 | } else if (!cm->emergency_stop && check_charging_duration(cm)) { | |
685 | dev_dbg(cm->dev, | |
e5409cbd | 686 | "Charging/Discharging duration is out of range\n"); |
2ed9e9b6 CC |
687 | /* |
688 | * Check dropped voltage of battery. If battery voltage is more | |
689 | * dropped than fullbatt_vchkdrop_uV after fully charged state, | |
690 | * charger-manager have to recharge battery. | |
691 | */ | |
692 | } else if (!cm->emergency_stop && is_ext_pwr_online(cm) && | |
693 | !cm->charger_enabled) { | |
694 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
695 | ||
696 | /* | |
697 | * Check whether fully charged state to protect overcharge | |
698 | * if charger-manager is charging for battery. | |
699 | */ | |
700 | } else if (!cm->emergency_stop && is_full_charged(cm) && | |
701 | cm->charger_enabled) { | |
e5409cbd | 702 | dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged\n"); |
2ed9e9b6 CC |
703 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]); |
704 | ||
705 | try_charger_enable(cm, false); | |
706 | ||
707 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
3bb3dbbd DK |
708 | } else { |
709 | cm->emergency_stop = 0; | |
2ed9e9b6 CC |
710 | if (is_ext_pwr_online(cm)) { |
711 | if (!try_charger_enable(cm, true)) | |
712 | uevent_notify(cm, "CHARGING"); | |
713 | } | |
3bb3dbbd DK |
714 | } |
715 | ||
716 | return true; | |
717 | } | |
718 | ||
719 | /** | |
720 | * cm_monitor - Monitor every battery. | |
721 | * | |
722 | * Returns true if there is an event to notify from any of the batteries. | |
723 | * (True if the status of "emergency_stop" changes) | |
724 | */ | |
725 | static bool cm_monitor(void) | |
726 | { | |
727 | bool stop = false; | |
728 | struct charger_manager *cm; | |
729 | ||
730 | mutex_lock(&cm_list_mtx); | |
731 | ||
bb2a95c2 AL |
732 | list_for_each_entry(cm, &cm_list, entry) { |
733 | if (_cm_monitor(cm)) | |
734 | stop = true; | |
735 | } | |
3bb3dbbd DK |
736 | |
737 | mutex_unlock(&cm_list_mtx); | |
738 | ||
739 | return stop; | |
740 | } | |
741 | ||
d829dc75 CC |
742 | /** |
743 | * _setup_polling - Setup the next instance of polling. | |
744 | * @work: work_struct of the function _setup_polling. | |
745 | */ | |
746 | static void _setup_polling(struct work_struct *work) | |
747 | { | |
748 | unsigned long min = ULONG_MAX; | |
749 | struct charger_manager *cm; | |
750 | bool keep_polling = false; | |
751 | unsigned long _next_polling; | |
752 | ||
753 | mutex_lock(&cm_list_mtx); | |
754 | ||
755 | list_for_each_entry(cm, &cm_list, entry) { | |
756 | if (is_polling_required(cm) && cm->desc->polling_interval_ms) { | |
757 | keep_polling = true; | |
758 | ||
759 | if (min > cm->desc->polling_interval_ms) | |
760 | min = cm->desc->polling_interval_ms; | |
761 | } | |
762 | } | |
763 | ||
764 | polling_jiffy = msecs_to_jiffies(min); | |
765 | if (polling_jiffy <= CM_JIFFIES_SMALL) | |
766 | polling_jiffy = CM_JIFFIES_SMALL + 1; | |
767 | ||
768 | if (!keep_polling) | |
769 | polling_jiffy = ULONG_MAX; | |
770 | if (polling_jiffy == ULONG_MAX) | |
771 | goto out; | |
772 | ||
773 | WARN(cm_wq == NULL, "charger-manager: workqueue not initialized" | |
774 | ". try it later. %s\n", __func__); | |
775 | ||
2fbb520d TH |
776 | /* |
777 | * Use mod_delayed_work() iff the next polling interval should | |
778 | * occur before the currently scheduled one. If @cm_monitor_work | |
779 | * isn't active, the end result is the same, so no need to worry | |
780 | * about stale @next_polling. | |
781 | */ | |
d829dc75 CC |
782 | _next_polling = jiffies + polling_jiffy; |
783 | ||
2fbb520d | 784 | if (time_before(_next_polling, next_polling)) { |
41f63c53 | 785 | mod_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy); |
2fbb520d TH |
786 | next_polling = _next_polling; |
787 | } else { | |
788 | if (queue_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy)) | |
789 | next_polling = _next_polling; | |
d829dc75 | 790 | } |
d829dc75 CC |
791 | out: |
792 | mutex_unlock(&cm_list_mtx); | |
793 | } | |
794 | static DECLARE_WORK(setup_polling, _setup_polling); | |
795 | ||
796 | /** | |
797 | * cm_monitor_poller - The Monitor / Poller. | |
798 | * @work: work_struct of the function cm_monitor_poller | |
799 | * | |
800 | * During non-suspended state, cm_monitor_poller is used to poll and monitor | |
801 | * the batteries. | |
802 | */ | |
803 | static void cm_monitor_poller(struct work_struct *work) | |
804 | { | |
805 | cm_monitor(); | |
806 | schedule_work(&setup_polling); | |
807 | } | |
808 | ||
dfeccb12 CC |
809 | /** |
810 | * fullbatt_handler - Event handler for CM_EVENT_BATT_FULL | |
811 | * @cm: the Charger Manager representing the battery. | |
812 | */ | |
813 | static void fullbatt_handler(struct charger_manager *cm) | |
814 | { | |
815 | struct charger_desc *desc = cm->desc; | |
816 | ||
817 | if (!desc->fullbatt_vchkdrop_uV || !desc->fullbatt_vchkdrop_ms) | |
818 | goto out; | |
819 | ||
820 | if (cm_suspended) | |
821 | device_set_wakeup_capable(cm->dev, true); | |
822 | ||
41f63c53 TH |
823 | mod_delayed_work(cm_wq, &cm->fullbatt_vchk_work, |
824 | msecs_to_jiffies(desc->fullbatt_vchkdrop_ms)); | |
dfeccb12 CC |
825 | cm->fullbatt_vchk_jiffies_at = jiffies + msecs_to_jiffies( |
826 | desc->fullbatt_vchkdrop_ms); | |
827 | ||
828 | if (cm->fullbatt_vchk_jiffies_at == 0) | |
829 | cm->fullbatt_vchk_jiffies_at = 1; | |
830 | ||
831 | out: | |
e5409cbd | 832 | dev_info(cm->dev, "EVENT_HANDLE: Battery Fully Charged\n"); |
dfeccb12 CC |
833 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_FULL]); |
834 | } | |
835 | ||
836 | /** | |
837 | * battout_handler - Event handler for CM_EVENT_BATT_OUT | |
838 | * @cm: the Charger Manager representing the battery. | |
839 | */ | |
840 | static void battout_handler(struct charger_manager *cm) | |
841 | { | |
842 | if (cm_suspended) | |
843 | device_set_wakeup_capable(cm->dev, true); | |
844 | ||
845 | if (!is_batt_present(cm)) { | |
846 | dev_emerg(cm->dev, "Battery Pulled Out!\n"); | |
847 | uevent_notify(cm, default_event_names[CM_EVENT_BATT_OUT]); | |
848 | } else { | |
849 | uevent_notify(cm, "Battery Reinserted?"); | |
850 | } | |
851 | } | |
852 | ||
853 | /** | |
854 | * misc_event_handler - Handler for other evnets | |
855 | * @cm: the Charger Manager representing the battery. | |
856 | * @type: the Charger Manager representing the battery. | |
857 | */ | |
858 | static void misc_event_handler(struct charger_manager *cm, | |
859 | enum cm_event_types type) | |
860 | { | |
861 | if (cm_suspended) | |
862 | device_set_wakeup_capable(cm->dev, true); | |
863 | ||
2fbb520d | 864 | if (is_polling_required(cm) && cm->desc->polling_interval_ms) |
dfeccb12 CC |
865 | schedule_work(&setup_polling); |
866 | uevent_notify(cm, default_event_names[type]); | |
867 | } | |
868 | ||
ad3d13ee DK |
869 | static int charger_get_property(struct power_supply *psy, |
870 | enum power_supply_property psp, | |
871 | union power_supply_propval *val) | |
872 | { | |
873 | struct charger_manager *cm = container_of(psy, | |
874 | struct charger_manager, charger_psy); | |
875 | struct charger_desc *desc = cm->desc; | |
bdbe8144 | 876 | struct power_supply *fuel_gauge; |
df58c04c AV |
877 | int ret = 0; |
878 | int uV; | |
ad3d13ee DK |
879 | |
880 | switch (psp) { | |
881 | case POWER_SUPPLY_PROP_STATUS: | |
882 | if (is_charging(cm)) | |
883 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
884 | else if (is_ext_pwr_online(cm)) | |
885 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
886 | else | |
887 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
888 | break; | |
889 | case POWER_SUPPLY_PROP_HEALTH: | |
890 | if (cm->emergency_stop > 0) | |
891 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
892 | else if (cm->emergency_stop < 0) | |
893 | val->intval = POWER_SUPPLY_HEALTH_COLD; | |
894 | else | |
895 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
896 | break; | |
897 | case POWER_SUPPLY_PROP_PRESENT: | |
898 | if (is_batt_present(cm)) | |
899 | val->intval = 1; | |
900 | else | |
901 | val->intval = 0; | |
902 | break; | |
903 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
df58c04c | 904 | ret = get_batt_uV(cm, &val->intval); |
ad3d13ee DK |
905 | break; |
906 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
bdbe8144 KK |
907 | fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge); |
908 | if (!fuel_gauge) { | |
909 | ret = -ENODEV; | |
910 | break; | |
911 | } | |
912 | ret = fuel_gauge->get_property(fuel_gauge, | |
ad3d13ee DK |
913 | POWER_SUPPLY_PROP_CURRENT_NOW, val); |
914 | break; | |
915 | case POWER_SUPPLY_PROP_TEMP: | |
ad3d13ee | 916 | case POWER_SUPPLY_PROP_TEMP_AMBIENT: |
5c49a625 | 917 | return cm_get_battery_temperature(cm, &val->intval); |
ad3d13ee | 918 | case POWER_SUPPLY_PROP_CAPACITY: |
bdbe8144 KK |
919 | fuel_gauge = power_supply_get_by_name(cm->desc->psy_fuel_gauge); |
920 | if (!fuel_gauge) { | |
ad3d13ee DK |
921 | ret = -ENODEV; |
922 | break; | |
923 | } | |
924 | ||
925 | if (!is_batt_present(cm)) { | |
926 | /* There is no battery. Assume 100% */ | |
927 | val->intval = 100; | |
928 | break; | |
929 | } | |
930 | ||
bdbe8144 | 931 | ret = fuel_gauge->get_property(fuel_gauge, |
ad3d13ee DK |
932 | POWER_SUPPLY_PROP_CAPACITY, val); |
933 | if (ret) | |
934 | break; | |
935 | ||
936 | if (val->intval > 100) { | |
937 | val->intval = 100; | |
938 | break; | |
939 | } | |
940 | if (val->intval < 0) | |
941 | val->intval = 0; | |
942 | ||
943 | /* Do not adjust SOC when charging: voltage is overrated */ | |
944 | if (is_charging(cm)) | |
945 | break; | |
946 | ||
947 | /* | |
948 | * If the capacity value is inconsistent, calibrate it base on | |
949 | * the battery voltage values and the thresholds given as desc | |
950 | */ | |
951 | ret = get_batt_uV(cm, &uV); | |
952 | if (ret) { | |
953 | /* Voltage information not available. No calibration */ | |
954 | ret = 0; | |
955 | break; | |
956 | } | |
957 | ||
958 | if (desc->fullbatt_uV > 0 && uV >= desc->fullbatt_uV && | |
959 | !is_charging(cm)) { | |
960 | val->intval = 100; | |
961 | break; | |
962 | } | |
963 | ||
964 | break; | |
965 | case POWER_SUPPLY_PROP_ONLINE: | |
966 | if (is_ext_pwr_online(cm)) | |
967 | val->intval = 1; | |
968 | else | |
969 | val->intval = 0; | |
970 | break; | |
971 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
2ed9e9b6 | 972 | if (is_full_charged(cm)) |
ad3d13ee | 973 | val->intval = 1; |
2ed9e9b6 CC |
974 | else |
975 | val->intval = 0; | |
ad3d13ee DK |
976 | ret = 0; |
977 | break; | |
978 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
979 | if (is_charging(cm)) { | |
bdbe8144 KK |
980 | fuel_gauge = power_supply_get_by_name( |
981 | cm->desc->psy_fuel_gauge); | |
982 | if (!fuel_gauge) { | |
983 | ret = -ENODEV; | |
984 | break; | |
985 | } | |
986 | ||
987 | ret = fuel_gauge->get_property(fuel_gauge, | |
ad3d13ee DK |
988 | POWER_SUPPLY_PROP_CHARGE_NOW, |
989 | val); | |
990 | if (ret) { | |
991 | val->intval = 1; | |
992 | ret = 0; | |
993 | } else { | |
994 | /* If CHARGE_NOW is supplied, use it */ | |
995 | val->intval = (val->intval > 0) ? | |
996 | val->intval : 1; | |
997 | } | |
998 | } else { | |
999 | val->intval = 0; | |
1000 | } | |
1001 | break; | |
1002 | default: | |
1003 | return -EINVAL; | |
1004 | } | |
1005 | return ret; | |
1006 | } | |
1007 | ||
1008 | #define NUM_CHARGER_PSY_OPTIONAL (4) | |
1009 | static enum power_supply_property default_charger_props[] = { | |
1010 | /* Guaranteed to provide */ | |
1011 | POWER_SUPPLY_PROP_STATUS, | |
1012 | POWER_SUPPLY_PROP_HEALTH, | |
1013 | POWER_SUPPLY_PROP_PRESENT, | |
1014 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
1015 | POWER_SUPPLY_PROP_CAPACITY, | |
1016 | POWER_SUPPLY_PROP_ONLINE, | |
1017 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
1018 | /* | |
1019 | * Optional properties are: | |
1020 | * POWER_SUPPLY_PROP_CHARGE_NOW, | |
1021 | * POWER_SUPPLY_PROP_CURRENT_NOW, | |
1022 | * POWER_SUPPLY_PROP_TEMP, and | |
1023 | * POWER_SUPPLY_PROP_TEMP_AMBIENT, | |
1024 | */ | |
1025 | }; | |
1026 | ||
1027 | static struct power_supply psy_default = { | |
1028 | .name = "battery", | |
1029 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
1030 | .properties = default_charger_props, | |
1031 | .num_properties = ARRAY_SIZE(default_charger_props), | |
1032 | .get_property = charger_get_property, | |
ba9c9182 | 1033 | .no_thermal = true, |
ad3d13ee DK |
1034 | }; |
1035 | ||
3bb3dbbd DK |
1036 | /** |
1037 | * cm_setup_timer - For in-suspend monitoring setup wakeup alarm | |
1038 | * for suspend_again. | |
1039 | * | |
1040 | * Returns true if the alarm is set for Charger Manager to use. | |
1041 | * Returns false if | |
1042 | * cm_setup_timer fails to set an alarm, | |
1043 | * cm_setup_timer does not need to set an alarm for Charger Manager, | |
1044 | * or an alarm previously configured is to be used. | |
1045 | */ | |
1046 | static bool cm_setup_timer(void) | |
1047 | { | |
1048 | struct charger_manager *cm; | |
1049 | unsigned int wakeup_ms = UINT_MAX; | |
1050 | bool ret = false; | |
1051 | ||
1052 | mutex_lock(&cm_list_mtx); | |
1053 | ||
1054 | list_for_each_entry(cm, &cm_list, entry) { | |
d829dc75 CC |
1055 | unsigned int fbchk_ms = 0; |
1056 | ||
1057 | /* fullbatt_vchk is required. setup timer for that */ | |
1058 | if (cm->fullbatt_vchk_jiffies_at) { | |
1059 | fbchk_ms = jiffies_to_msecs(cm->fullbatt_vchk_jiffies_at | |
1060 | - jiffies); | |
1061 | if (time_is_before_eq_jiffies( | |
1062 | cm->fullbatt_vchk_jiffies_at) || | |
1063 | msecs_to_jiffies(fbchk_ms) < CM_JIFFIES_SMALL) { | |
1064 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
1065 | fbchk_ms = 0; | |
1066 | } | |
1067 | } | |
1068 | CM_MIN_VALID(wakeup_ms, fbchk_ms); | |
1069 | ||
3bb3dbbd DK |
1070 | /* Skip if polling is not required for this CM */ |
1071 | if (!is_polling_required(cm) && !cm->emergency_stop) | |
1072 | continue; | |
1073 | if (cm->desc->polling_interval_ms == 0) | |
1074 | continue; | |
1075 | CM_MIN_VALID(wakeup_ms, cm->desc->polling_interval_ms); | |
1076 | } | |
1077 | ||
1078 | mutex_unlock(&cm_list_mtx); | |
1079 | ||
1080 | if (wakeup_ms < UINT_MAX && wakeup_ms > 0) { | |
e5409cbd | 1081 | pr_info("Charger Manager wakeup timer: %u ms\n", wakeup_ms); |
3bb3dbbd DK |
1082 | if (rtc_dev) { |
1083 | struct rtc_wkalrm tmp; | |
1084 | unsigned long time, now; | |
1085 | unsigned long add = DIV_ROUND_UP(wakeup_ms, 1000); | |
1086 | ||
1087 | /* | |
1088 | * Set alarm with the polling interval (wakeup_ms) | |
1089 | * except when rtc_wkalarm_save comes first. | |
1090 | * However, the alarm time should be NOW + | |
1091 | * CM_RTC_SMALL or later. | |
1092 | */ | |
1093 | tmp.enabled = 1; | |
1094 | rtc_read_time(rtc_dev, &tmp.time); | |
1095 | rtc_tm_to_time(&tmp.time, &now); | |
1096 | if (add < CM_RTC_SMALL) | |
1097 | add = CM_RTC_SMALL; | |
1098 | time = now + add; | |
1099 | ||
1100 | ret = true; | |
1101 | ||
1102 | if (rtc_wkalarm_save.enabled && | |
1103 | rtc_wkalarm_save_time && | |
1104 | rtc_wkalarm_save_time < time) { | |
1105 | if (rtc_wkalarm_save_time < now + CM_RTC_SMALL) | |
1106 | time = now + CM_RTC_SMALL; | |
1107 | else | |
1108 | time = rtc_wkalarm_save_time; | |
1109 | ||
1110 | /* The timer is not appointed by CM */ | |
1111 | ret = false; | |
1112 | } | |
1113 | ||
e5409cbd | 1114 | pr_info("Waking up after %lu secs\n", time - now); |
3bb3dbbd DK |
1115 | |
1116 | rtc_time_to_tm(time, &tmp.time); | |
1117 | rtc_set_alarm(rtc_dev, &tmp); | |
1118 | cm_suspend_duration_ms += wakeup_ms; | |
1119 | return ret; | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | if (rtc_dev) | |
1124 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
1125 | return false; | |
1126 | } | |
1127 | ||
d829dc75 CC |
1128 | static void _cm_fbchk_in_suspend(struct charger_manager *cm) |
1129 | { | |
1130 | unsigned long jiffy_now = jiffies; | |
1131 | ||
1132 | if (!cm->fullbatt_vchk_jiffies_at) | |
1133 | return; | |
1134 | ||
1135 | if (g_desc && g_desc->assume_timer_stops_in_suspend) | |
1136 | jiffy_now += msecs_to_jiffies(cm_suspend_duration_ms); | |
1137 | ||
1138 | /* Execute now if it's going to be executed not too long after */ | |
1139 | jiffy_now += CM_JIFFIES_SMALL; | |
1140 | ||
1141 | if (time_after_eq(jiffy_now, cm->fullbatt_vchk_jiffies_at)) | |
1142 | fullbatt_vchk(&cm->fullbatt_vchk_work.work); | |
1143 | } | |
1144 | ||
3bb3dbbd DK |
1145 | /** |
1146 | * cm_suspend_again - Determine whether suspend again or not | |
1147 | * | |
1148 | * Returns true if the system should be suspended again | |
1149 | * Returns false if the system should be woken up | |
1150 | */ | |
1151 | bool cm_suspend_again(void) | |
1152 | { | |
1153 | struct charger_manager *cm; | |
1154 | bool ret = false; | |
1155 | ||
1156 | if (!g_desc || !g_desc->rtc_only_wakeup || !g_desc->rtc_only_wakeup() || | |
1157 | !cm_rtc_set) | |
1158 | return false; | |
1159 | ||
1160 | if (cm_monitor()) | |
1161 | goto out; | |
1162 | ||
1163 | ret = true; | |
1164 | mutex_lock(&cm_list_mtx); | |
1165 | list_for_each_entry(cm, &cm_list, entry) { | |
d829dc75 CC |
1166 | _cm_fbchk_in_suspend(cm); |
1167 | ||
3bb3dbbd | 1168 | if (cm->status_save_ext_pwr_inserted != is_ext_pwr_online(cm) || |
bb2a95c2 | 1169 | cm->status_save_batt != is_batt_present(cm)) { |
3bb3dbbd | 1170 | ret = false; |
bb2a95c2 AL |
1171 | break; |
1172 | } | |
3bb3dbbd DK |
1173 | } |
1174 | mutex_unlock(&cm_list_mtx); | |
1175 | ||
1176 | cm_rtc_set = cm_setup_timer(); | |
1177 | out: | |
1178 | /* It's about the time when the non-CM appointed timer goes off */ | |
1179 | if (rtc_wkalarm_save.enabled) { | |
1180 | unsigned long now; | |
1181 | struct rtc_time tmp; | |
1182 | ||
1183 | rtc_read_time(rtc_dev, &tmp); | |
1184 | rtc_tm_to_time(&tmp, &now); | |
1185 | ||
1186 | if (rtc_wkalarm_save_time && | |
1187 | now + CM_RTC_SMALL >= rtc_wkalarm_save_time) | |
1188 | return false; | |
1189 | } | |
1190 | return ret; | |
1191 | } | |
1192 | EXPORT_SYMBOL_GPL(cm_suspend_again); | |
1193 | ||
1194 | /** | |
1195 | * setup_charger_manager - initialize charger_global_desc data | |
1196 | * @gd: pointer to instance of charger_global_desc | |
1197 | */ | |
1198 | int setup_charger_manager(struct charger_global_desc *gd) | |
1199 | { | |
1200 | if (!gd) | |
1201 | return -EINVAL; | |
1202 | ||
1203 | if (rtc_dev) | |
1204 | rtc_class_close(rtc_dev); | |
1205 | rtc_dev = NULL; | |
1206 | g_desc = NULL; | |
1207 | ||
1208 | if (!gd->rtc_only_wakeup) { | |
e5409cbd | 1209 | pr_err("The callback rtc_only_wakeup is not given\n"); |
3bb3dbbd DK |
1210 | return -EINVAL; |
1211 | } | |
1212 | ||
1213 | if (gd->rtc_name) { | |
1214 | rtc_dev = rtc_class_open(gd->rtc_name); | |
1215 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
1216 | rtc_dev = NULL; | |
1217 | /* Retry at probe. RTC may be not registered yet */ | |
1218 | } | |
1219 | } else { | |
e5409cbd | 1220 | pr_warn("No wakeup timer is given for charger manager. " |
3bb3dbbd DK |
1221 | "In-suspend monitoring won't work.\n"); |
1222 | } | |
1223 | ||
1224 | g_desc = gd; | |
1225 | return 0; | |
1226 | } | |
1227 | EXPORT_SYMBOL_GPL(setup_charger_manager); | |
1228 | ||
bee737bc CC |
1229 | /** |
1230 | * charger_extcon_work - enable/diable charger according to the state | |
1231 | * of charger cable | |
1232 | * | |
1233 | * @work: work_struct of the function charger_extcon_work. | |
1234 | */ | |
1235 | static void charger_extcon_work(struct work_struct *work) | |
1236 | { | |
1237 | struct charger_cable *cable = | |
1238 | container_of(work, struct charger_cable, wq); | |
45cd4fb2 CC |
1239 | int ret; |
1240 | ||
1241 | if (cable->attached && cable->min_uA != 0 && cable->max_uA != 0) { | |
1242 | ret = regulator_set_current_limit(cable->charger->consumer, | |
1243 | cable->min_uA, cable->max_uA); | |
1244 | if (ret < 0) { | |
1245 | pr_err("Cannot set current limit of %s (%s)\n", | |
e5409cbd | 1246 | cable->charger->regulator_name, cable->name); |
45cd4fb2 CC |
1247 | return; |
1248 | } | |
1249 | ||
1250 | pr_info("Set current limit of %s : %duA ~ %duA\n", | |
e5409cbd JP |
1251 | cable->charger->regulator_name, |
1252 | cable->min_uA, cable->max_uA); | |
45cd4fb2 | 1253 | } |
bee737bc CC |
1254 | |
1255 | try_charger_enable(cable->cm, cable->attached); | |
1256 | } | |
1257 | ||
1258 | /** | |
1259 | * charger_extcon_notifier - receive the state of charger cable | |
1260 | * when registered cable is attached or detached. | |
1261 | * | |
1262 | * @self: the notifier block of the charger_extcon_notifier. | |
1263 | * @event: the cable state. | |
1264 | * @ptr: the data pointer of notifier block. | |
1265 | */ | |
1266 | static int charger_extcon_notifier(struct notifier_block *self, | |
1267 | unsigned long event, void *ptr) | |
1268 | { | |
1269 | struct charger_cable *cable = | |
1270 | container_of(self, struct charger_cable, nb); | |
1271 | ||
2ed9e9b6 CC |
1272 | /* |
1273 | * The newly state of charger cable. | |
1274 | * If cable is attached, cable->attached is true. | |
1275 | */ | |
bee737bc | 1276 | cable->attached = event; |
2ed9e9b6 CC |
1277 | |
1278 | /* | |
1279 | * Setup monitoring to check battery state | |
1280 | * when charger cable is attached. | |
1281 | */ | |
1282 | if (cable->attached && is_polling_required(cable->cm)) { | |
2fbb520d | 1283 | cancel_work_sync(&setup_polling); |
2ed9e9b6 CC |
1284 | schedule_work(&setup_polling); |
1285 | } | |
1286 | ||
1287 | /* | |
1288 | * Setup work for controlling charger(regulator) | |
1289 | * according to charger cable. | |
1290 | */ | |
bee737bc CC |
1291 | schedule_work(&cable->wq); |
1292 | ||
1293 | return NOTIFY_DONE; | |
1294 | } | |
1295 | ||
1296 | /** | |
1297 | * charger_extcon_init - register external connector to use it | |
1298 | * as the charger cable | |
1299 | * | |
1300 | * @cm: the Charger Manager representing the battery. | |
1301 | * @cable: the Charger cable representing the external connector. | |
1302 | */ | |
1303 | static int charger_extcon_init(struct charger_manager *cm, | |
1304 | struct charger_cable *cable) | |
1305 | { | |
1306 | int ret = 0; | |
1307 | ||
1308 | /* | |
1309 | * Charger manager use Extcon framework to identify | |
1310 | * the charger cable among various external connector | |
1311 | * cable (e.g., TA, USB, MHL, Dock). | |
1312 | */ | |
1313 | INIT_WORK(&cable->wq, charger_extcon_work); | |
1314 | cable->nb.notifier_call = charger_extcon_notifier; | |
1315 | ret = extcon_register_interest(&cable->extcon_dev, | |
1316 | cable->extcon_name, cable->name, &cable->nb); | |
1317 | if (ret < 0) { | |
e5409cbd JP |
1318 | pr_info("Cannot register extcon_dev for %s(cable: %s)\n", |
1319 | cable->extcon_name, cable->name); | |
bee737bc CC |
1320 | ret = -EINVAL; |
1321 | } | |
1322 | ||
1323 | return ret; | |
1324 | } | |
1325 | ||
41468a11 CC |
1326 | /** |
1327 | * charger_manager_register_extcon - Register extcon device to recevie state | |
1328 | * of charger cable. | |
1329 | * @cm: the Charger Manager representing the battery. | |
1330 | * | |
1331 | * This function support EXTCON(External Connector) subsystem to detect the | |
1332 | * state of charger cables for enabling or disabling charger(regulator) and | |
1333 | * select the charger cable for charging among a number of external cable | |
1334 | * according to policy of H/W board. | |
1335 | */ | |
1336 | static int charger_manager_register_extcon(struct charger_manager *cm) | |
1337 | { | |
1338 | struct charger_desc *desc = cm->desc; | |
1339 | struct charger_regulator *charger; | |
1340 | int ret = 0; | |
1341 | int i; | |
1342 | int j; | |
1343 | ||
1344 | for (i = 0; i < desc->num_charger_regulators; i++) { | |
1345 | charger = &desc->charger_regulators[i]; | |
1346 | ||
1347 | charger->consumer = regulator_get(cm->dev, | |
1348 | charger->regulator_name); | |
5a6c2208 | 1349 | if (IS_ERR(charger->consumer)) { |
e5409cbd JP |
1350 | dev_err(cm->dev, "Cannot find charger(%s)\n", |
1351 | charger->regulator_name); | |
5a6c2208 | 1352 | return PTR_ERR(charger->consumer); |
41468a11 CC |
1353 | } |
1354 | charger->cm = cm; | |
1355 | ||
1356 | for (j = 0; j < charger->num_cables; j++) { | |
1357 | struct charger_cable *cable = &charger->cables[j]; | |
1358 | ||
1359 | ret = charger_extcon_init(cm, cable); | |
1360 | if (ret < 0) { | |
e5409cbd JP |
1361 | dev_err(cm->dev, "Cannot initialize charger(%s)\n", |
1362 | charger->regulator_name); | |
41468a11 CC |
1363 | goto err; |
1364 | } | |
1365 | cable->charger = charger; | |
1366 | cable->cm = cm; | |
1367 | } | |
1368 | } | |
1369 | ||
1370 | err: | |
1371 | return ret; | |
1372 | } | |
1373 | ||
3950c786 CC |
1374 | /* help function of sysfs node to control charger(regulator) */ |
1375 | static ssize_t charger_name_show(struct device *dev, | |
1376 | struct device_attribute *attr, char *buf) | |
1377 | { | |
1378 | struct charger_regulator *charger | |
1379 | = container_of(attr, struct charger_regulator, attr_name); | |
1380 | ||
1381 | return sprintf(buf, "%s\n", charger->regulator_name); | |
1382 | } | |
1383 | ||
1384 | static ssize_t charger_state_show(struct device *dev, | |
1385 | struct device_attribute *attr, char *buf) | |
1386 | { | |
1387 | struct charger_regulator *charger | |
1388 | = container_of(attr, struct charger_regulator, attr_state); | |
1389 | int state = 0; | |
1390 | ||
1391 | if (!charger->externally_control) | |
1392 | state = regulator_is_enabled(charger->consumer); | |
1393 | ||
1394 | return sprintf(buf, "%s\n", state ? "enabled" : "disabled"); | |
1395 | } | |
1396 | ||
1397 | static ssize_t charger_externally_control_show(struct device *dev, | |
1398 | struct device_attribute *attr, char *buf) | |
1399 | { | |
1400 | struct charger_regulator *charger = container_of(attr, | |
1401 | struct charger_regulator, attr_externally_control); | |
1402 | ||
1403 | return sprintf(buf, "%d\n", charger->externally_control); | |
1404 | } | |
1405 | ||
1406 | static ssize_t charger_externally_control_store(struct device *dev, | |
1407 | struct device_attribute *attr, const char *buf, | |
1408 | size_t count) | |
1409 | { | |
1410 | struct charger_regulator *charger | |
1411 | = container_of(attr, struct charger_regulator, | |
1412 | attr_externally_control); | |
1413 | struct charger_manager *cm = charger->cm; | |
1414 | struct charger_desc *desc = cm->desc; | |
1415 | int i; | |
1416 | int ret; | |
1417 | int externally_control; | |
1418 | int chargers_externally_control = 1; | |
1419 | ||
1420 | ret = sscanf(buf, "%d", &externally_control); | |
1421 | if (ret == 0) { | |
1422 | ret = -EINVAL; | |
1423 | return ret; | |
1424 | } | |
1425 | ||
1426 | if (!externally_control) { | |
1427 | charger->externally_control = 0; | |
1428 | return count; | |
1429 | } | |
1430 | ||
1431 | for (i = 0; i < desc->num_charger_regulators; i++) { | |
1432 | if (&desc->charger_regulators[i] != charger && | |
41468a11 | 1433 | !desc->charger_regulators[i].externally_control) { |
3950c786 CC |
1434 | /* |
1435 | * At least, one charger is controlled by | |
1436 | * charger-manager | |
1437 | */ | |
1438 | chargers_externally_control = 0; | |
1439 | break; | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | if (!chargers_externally_control) { | |
1444 | if (cm->charger_enabled) { | |
1445 | try_charger_enable(charger->cm, false); | |
1446 | charger->externally_control = externally_control; | |
1447 | try_charger_enable(charger->cm, true); | |
1448 | } else { | |
1449 | charger->externally_control = externally_control; | |
1450 | } | |
1451 | } else { | |
1452 | dev_warn(cm->dev, | |
e5409cbd JP |
1453 | "'%s' regulator should be controlled in charger-manager because charger-manager must need at least one charger for charging\n", |
1454 | charger->regulator_name); | |
3950c786 CC |
1455 | } |
1456 | ||
1457 | return count; | |
1458 | } | |
1459 | ||
41468a11 CC |
1460 | /** |
1461 | * charger_manager_register_sysfs - Register sysfs entry for each charger | |
1462 | * @cm: the Charger Manager representing the battery. | |
1463 | * | |
1464 | * This function add sysfs entry for charger(regulator) to control charger from | |
1465 | * user-space. If some development board use one more chargers for charging | |
1466 | * but only need one charger on specific case which is dependent on user | |
1467 | * scenario or hardware restrictions, the user enter 1 or 0(zero) to '/sys/ | |
1468 | * class/power_supply/battery/charger.[index]/externally_control'. For example, | |
1469 | * if user enter 1 to 'sys/class/power_supply/battery/charger.[index]/ | |
1470 | * externally_control, this charger isn't controlled from charger-manager and | |
1471 | * always stay off state of regulator. | |
1472 | */ | |
1473 | static int charger_manager_register_sysfs(struct charger_manager *cm) | |
1474 | { | |
1475 | struct charger_desc *desc = cm->desc; | |
1476 | struct charger_regulator *charger; | |
1477 | int chargers_externally_control = 1; | |
1478 | char buf[11]; | |
1479 | char *str; | |
1480 | int ret = 0; | |
1481 | int i; | |
1482 | ||
1483 | /* Create sysfs entry to control charger(regulator) */ | |
1484 | for (i = 0; i < desc->num_charger_regulators; i++) { | |
1485 | charger = &desc->charger_regulators[i]; | |
1486 | ||
1487 | snprintf(buf, 10, "charger.%d", i); | |
883c10a9 JL |
1488 | str = devm_kzalloc(cm->dev, |
1489 | sizeof(char) * (strlen(buf) + 1), GFP_KERNEL); | |
41468a11 | 1490 | if (!str) { |
41468a11 CC |
1491 | ret = -ENOMEM; |
1492 | goto err; | |
1493 | } | |
1494 | strcpy(str, buf); | |
1495 | ||
1496 | charger->attrs[0] = &charger->attr_name.attr; | |
1497 | charger->attrs[1] = &charger->attr_state.attr; | |
1498 | charger->attrs[2] = &charger->attr_externally_control.attr; | |
1499 | charger->attrs[3] = NULL; | |
1500 | charger->attr_g.name = str; | |
1501 | charger->attr_g.attrs = charger->attrs; | |
1502 | ||
1503 | sysfs_attr_init(&charger->attr_name.attr); | |
1504 | charger->attr_name.attr.name = "name"; | |
1505 | charger->attr_name.attr.mode = 0444; | |
1506 | charger->attr_name.show = charger_name_show; | |
1507 | ||
1508 | sysfs_attr_init(&charger->attr_state.attr); | |
1509 | charger->attr_state.attr.name = "state"; | |
1510 | charger->attr_state.attr.mode = 0444; | |
1511 | charger->attr_state.show = charger_state_show; | |
1512 | ||
1513 | sysfs_attr_init(&charger->attr_externally_control.attr); | |
1514 | charger->attr_externally_control.attr.name | |
1515 | = "externally_control"; | |
1516 | charger->attr_externally_control.attr.mode = 0644; | |
1517 | charger->attr_externally_control.show | |
1518 | = charger_externally_control_show; | |
1519 | charger->attr_externally_control.store | |
1520 | = charger_externally_control_store; | |
1521 | ||
1522 | if (!desc->charger_regulators[i].externally_control || | |
1523 | !chargers_externally_control) | |
1524 | chargers_externally_control = 0; | |
1525 | ||
e5409cbd JP |
1526 | dev_info(cm->dev, "'%s' regulator's externally_control is %d\n", |
1527 | charger->regulator_name, charger->externally_control); | |
41468a11 CC |
1528 | |
1529 | ret = sysfs_create_group(&cm->charger_psy.dev->kobj, | |
1530 | &charger->attr_g); | |
1531 | if (ret < 0) { | |
e5409cbd JP |
1532 | dev_err(cm->dev, "Cannot create sysfs entry of %s regulator\n", |
1533 | charger->regulator_name); | |
41468a11 CC |
1534 | ret = -EINVAL; |
1535 | goto err; | |
1536 | } | |
1537 | } | |
1538 | ||
1539 | if (chargers_externally_control) { | |
e5409cbd | 1540 | dev_err(cm->dev, "Cannot register regulator because charger-manager must need at least one charger for charging battery\n"); |
41468a11 CC |
1541 | ret = -EINVAL; |
1542 | goto err; | |
1543 | } | |
1544 | ||
1545 | err: | |
1546 | return ret; | |
1547 | } | |
1548 | ||
bdbe8144 KK |
1549 | static int cm_init_thermal_data(struct charger_manager *cm, |
1550 | struct power_supply *fuel_gauge) | |
5c49a625 JL |
1551 | { |
1552 | struct charger_desc *desc = cm->desc; | |
1553 | union power_supply_propval val; | |
1554 | int ret; | |
1555 | ||
1556 | /* Verify whether fuel gauge provides battery temperature */ | |
bdbe8144 | 1557 | ret = fuel_gauge->get_property(fuel_gauge, |
5c49a625 JL |
1558 | POWER_SUPPLY_PROP_TEMP, &val); |
1559 | ||
1560 | if (!ret) { | |
1561 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1562 | POWER_SUPPLY_PROP_TEMP; | |
1563 | cm->charger_psy.num_properties++; | |
1564 | cm->desc->measure_battery_temp = true; | |
1565 | } | |
1566 | #ifdef CONFIG_THERMAL | |
5c49a625 JL |
1567 | if (ret && desc->thermal_zone) { |
1568 | cm->tzd_batt = | |
1569 | thermal_zone_get_zone_by_name(desc->thermal_zone); | |
1570 | if (IS_ERR(cm->tzd_batt)) | |
1571 | return PTR_ERR(cm->tzd_batt); | |
1572 | ||
1573 | /* Use external thermometer */ | |
1574 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1575 | POWER_SUPPLY_PROP_TEMP_AMBIENT; | |
1576 | cm->charger_psy.num_properties++; | |
1577 | cm->desc->measure_battery_temp = true; | |
1578 | ret = 0; | |
1579 | } | |
1580 | #endif | |
1581 | if (cm->desc->measure_battery_temp) { | |
1582 | /* NOTICE : Default allowable minimum charge temperature is 0 */ | |
1583 | if (!desc->temp_max) | |
1584 | desc->temp_max = CM_DEFAULT_CHARGE_TEMP_MAX; | |
1585 | if (!desc->temp_diff) | |
1586 | desc->temp_diff = CM_DEFAULT_RECHARGE_TEMP_DIFF; | |
1587 | } | |
1588 | ||
1589 | return ret; | |
1590 | } | |
1591 | ||
856ee611 JL |
1592 | static struct of_device_id charger_manager_match[] = { |
1593 | { | |
1594 | .compatible = "charger-manager", | |
1595 | }, | |
1596 | {}, | |
1597 | }; | |
1598 | ||
434a09f9 | 1599 | static struct charger_desc *of_cm_parse_desc(struct device *dev) |
856ee611 JL |
1600 | { |
1601 | struct charger_desc *desc; | |
1602 | struct device_node *np = dev->of_node; | |
1603 | u32 poll_mode = CM_POLL_DISABLE; | |
1604 | u32 battery_stat = CM_NO_BATTERY; | |
1605 | int num_chgs = 0; | |
1606 | ||
1607 | desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL); | |
1608 | if (!desc) | |
1609 | return ERR_PTR(-ENOMEM); | |
1610 | ||
1611 | of_property_read_string(np, "cm-name", &desc->psy_name); | |
1612 | ||
1613 | of_property_read_u32(np, "cm-poll-mode", &poll_mode); | |
1614 | desc->polling_mode = poll_mode; | |
1615 | ||
1616 | of_property_read_u32(np, "cm-poll-interval", | |
1617 | &desc->polling_interval_ms); | |
1618 | ||
1619 | of_property_read_u32(np, "cm-fullbatt-vchkdrop-ms", | |
1620 | &desc->fullbatt_vchkdrop_ms); | |
1621 | of_property_read_u32(np, "cm-fullbatt-vchkdrop-volt", | |
1622 | &desc->fullbatt_vchkdrop_uV); | |
1623 | of_property_read_u32(np, "cm-fullbatt-voltage", &desc->fullbatt_uV); | |
1624 | of_property_read_u32(np, "cm-fullbatt-soc", &desc->fullbatt_soc); | |
1625 | of_property_read_u32(np, "cm-fullbatt-capacity", | |
1626 | &desc->fullbatt_full_capacity); | |
1627 | ||
1628 | of_property_read_u32(np, "cm-battery-stat", &battery_stat); | |
1629 | desc->battery_present = battery_stat; | |
1630 | ||
1631 | /* chargers */ | |
1632 | of_property_read_u32(np, "cm-num-chargers", &num_chgs); | |
1633 | if (num_chgs) { | |
1634 | /* Allocate empty bin at the tail of array */ | |
1635 | desc->psy_charger_stat = devm_kzalloc(dev, sizeof(char *) | |
1636 | * (num_chgs + 1), GFP_KERNEL); | |
1637 | if (desc->psy_charger_stat) { | |
1638 | int i; | |
1639 | for (i = 0; i < num_chgs; i++) | |
1640 | of_property_read_string_index(np, "cm-chargers", | |
1641 | i, &desc->psy_charger_stat[i]); | |
1642 | } else { | |
1643 | return ERR_PTR(-ENOMEM); | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | of_property_read_string(np, "cm-fuel-gauge", &desc->psy_fuel_gauge); | |
1648 | ||
1649 | of_property_read_string(np, "cm-thermal-zone", &desc->thermal_zone); | |
1650 | ||
1651 | of_property_read_u32(np, "cm-battery-cold", &desc->temp_min); | |
1652 | if (of_get_property(np, "cm-battery-cold-in-minus", NULL)) | |
1653 | desc->temp_min *= -1; | |
1654 | of_property_read_u32(np, "cm-battery-hot", &desc->temp_max); | |
1655 | of_property_read_u32(np, "cm-battery-temp-diff", &desc->temp_diff); | |
1656 | ||
1657 | of_property_read_u32(np, "cm-charging-max", | |
1658 | &desc->charging_max_duration_ms); | |
1659 | of_property_read_u32(np, "cm-discharging-max", | |
1660 | &desc->discharging_max_duration_ms); | |
1661 | ||
1662 | /* battery charger regualtors */ | |
1663 | desc->num_charger_regulators = of_get_child_count(np); | |
1664 | if (desc->num_charger_regulators) { | |
1665 | struct charger_regulator *chg_regs; | |
1666 | struct device_node *child; | |
1667 | ||
1668 | chg_regs = devm_kzalloc(dev, sizeof(*chg_regs) | |
1669 | * desc->num_charger_regulators, | |
1670 | GFP_KERNEL); | |
1671 | if (!chg_regs) | |
1672 | return ERR_PTR(-ENOMEM); | |
1673 | ||
1674 | desc->charger_regulators = chg_regs; | |
1675 | ||
1676 | for_each_child_of_node(np, child) { | |
1677 | struct charger_cable *cables; | |
1678 | struct device_node *_child; | |
1679 | ||
1680 | of_property_read_string(child, "cm-regulator-name", | |
1681 | &chg_regs->regulator_name); | |
1682 | ||
1683 | /* charger cables */ | |
1684 | chg_regs->num_cables = of_get_child_count(child); | |
1685 | if (chg_regs->num_cables) { | |
1686 | cables = devm_kzalloc(dev, sizeof(*cables) | |
1687 | * chg_regs->num_cables, | |
1688 | GFP_KERNEL); | |
1689 | if (!cables) | |
1690 | return ERR_PTR(-ENOMEM); | |
1691 | ||
1692 | chg_regs->cables = cables; | |
1693 | ||
1694 | for_each_child_of_node(child, _child) { | |
1695 | of_property_read_string(_child, | |
1696 | "cm-cable-name", &cables->name); | |
1697 | of_property_read_string(_child, | |
1698 | "cm-cable-extcon", | |
1699 | &cables->extcon_name); | |
1700 | of_property_read_u32(_child, | |
1701 | "cm-cable-min", | |
1702 | &cables->min_uA); | |
1703 | of_property_read_u32(_child, | |
1704 | "cm-cable-max", | |
1705 | &cables->max_uA); | |
1706 | cables++; | |
1707 | } | |
1708 | } | |
1709 | chg_regs++; | |
1710 | } | |
1711 | } | |
1712 | return desc; | |
1713 | } | |
1714 | ||
1715 | static inline struct charger_desc *cm_get_drv_data(struct platform_device *pdev) | |
1716 | { | |
1717 | if (pdev->dev.of_node) | |
1718 | return of_cm_parse_desc(&pdev->dev); | |
86515b7d | 1719 | return dev_get_platdata(&pdev->dev); |
856ee611 JL |
1720 | } |
1721 | ||
3bb3dbbd DK |
1722 | static int charger_manager_probe(struct platform_device *pdev) |
1723 | { | |
856ee611 | 1724 | struct charger_desc *desc = cm_get_drv_data(pdev); |
3bb3dbbd DK |
1725 | struct charger_manager *cm; |
1726 | int ret = 0, i = 0; | |
bee737bc | 1727 | int j = 0; |
ad3d13ee | 1728 | union power_supply_propval val; |
bdbe8144 | 1729 | struct power_supply *fuel_gauge; |
3bb3dbbd DK |
1730 | |
1731 | if (g_desc && !rtc_dev && g_desc->rtc_name) { | |
1732 | rtc_dev = rtc_class_open(g_desc->rtc_name); | |
1733 | if (IS_ERR_OR_NULL(rtc_dev)) { | |
1734 | rtc_dev = NULL; | |
e5409cbd | 1735 | dev_err(&pdev->dev, "Cannot get RTC %s\n", |
3bb3dbbd | 1736 | g_desc->rtc_name); |
883c10a9 | 1737 | return -ENODEV; |
3bb3dbbd DK |
1738 | } |
1739 | } | |
1740 | ||
c6738d06 | 1741 | if (IS_ERR(desc)) { |
e5409cbd | 1742 | dev_err(&pdev->dev, "No platform data (desc) found\n"); |
883c10a9 | 1743 | return -ENODEV; |
3bb3dbbd DK |
1744 | } |
1745 | ||
883c10a9 JL |
1746 | cm = devm_kzalloc(&pdev->dev, |
1747 | sizeof(struct charger_manager), GFP_KERNEL); | |
1748 | if (!cm) | |
1749 | return -ENOMEM; | |
3bb3dbbd DK |
1750 | |
1751 | /* Basic Values. Unspecified are Null or 0 */ | |
1752 | cm->dev = &pdev->dev; | |
883c10a9 | 1753 | cm->desc = desc; |
3bb3dbbd | 1754 | |
d829dc75 CC |
1755 | /* |
1756 | * The following two do not need to be errors. | |
1757 | * Users may intentionally ignore those two features. | |
1758 | */ | |
1759 | if (desc->fullbatt_uV == 0) { | |
e5409cbd | 1760 | dev_info(&pdev->dev, "Ignoring full-battery voltage threshold as it is not supplied\n"); |
d829dc75 CC |
1761 | } |
1762 | if (!desc->fullbatt_vchkdrop_ms || !desc->fullbatt_vchkdrop_uV) { | |
e5409cbd | 1763 | dev_info(&pdev->dev, "Disabling full-battery voltage drop checking mechanism as it is not supplied\n"); |
d829dc75 CC |
1764 | desc->fullbatt_vchkdrop_ms = 0; |
1765 | desc->fullbatt_vchkdrop_uV = 0; | |
1766 | } | |
2ed9e9b6 | 1767 | if (desc->fullbatt_soc == 0) { |
e5409cbd | 1768 | dev_info(&pdev->dev, "Ignoring full-battery soc(state of charge) threshold as it is not supplied\n"); |
2ed9e9b6 CC |
1769 | } |
1770 | if (desc->fullbatt_full_capacity == 0) { | |
e5409cbd | 1771 | dev_info(&pdev->dev, "Ignoring full-battery full capacity threshold as it is not supplied\n"); |
2ed9e9b6 | 1772 | } |
d829dc75 | 1773 | |
3bb3dbbd | 1774 | if (!desc->charger_regulators || desc->num_charger_regulators < 1) { |
e5409cbd | 1775 | dev_err(&pdev->dev, "charger_regulators undefined\n"); |
883c10a9 | 1776 | return -EINVAL; |
3bb3dbbd DK |
1777 | } |
1778 | ||
1779 | if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) { | |
e5409cbd | 1780 | dev_err(&pdev->dev, "No power supply defined\n"); |
883c10a9 | 1781 | return -EINVAL; |
3bb3dbbd DK |
1782 | } |
1783 | ||
661a8886 KK |
1784 | if (!desc->psy_fuel_gauge) { |
1785 | dev_err(&pdev->dev, "No fuel gauge power supply defined\n"); | |
1786 | return -EINVAL; | |
1787 | } | |
1788 | ||
3bb3dbbd DK |
1789 | /* Counting index only */ |
1790 | while (desc->psy_charger_stat[i]) | |
1791 | i++; | |
1792 | ||
cdaf3e15 | 1793 | /* Check if charger's supplies are present at probe */ |
3bb3dbbd | 1794 | for (i = 0; desc->psy_charger_stat[i]; i++) { |
cdaf3e15 KK |
1795 | struct power_supply *psy; |
1796 | ||
1797 | psy = power_supply_get_by_name(desc->psy_charger_stat[i]); | |
1798 | if (!psy) { | |
e5409cbd JP |
1799 | dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n", |
1800 | desc->psy_charger_stat[i]); | |
883c10a9 | 1801 | return -ENODEV; |
3bb3dbbd DK |
1802 | } |
1803 | } | |
1804 | ||
bdbe8144 KK |
1805 | fuel_gauge = power_supply_get_by_name(desc->psy_fuel_gauge); |
1806 | if (!fuel_gauge) { | |
3bb3dbbd | 1807 | dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n", |
e5409cbd | 1808 | desc->psy_fuel_gauge); |
883c10a9 | 1809 | return -ENODEV; |
3bb3dbbd DK |
1810 | } |
1811 | ||
1812 | if (desc->polling_interval_ms == 0 || | |
1813 | msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) { | |
1814 | dev_err(&pdev->dev, "polling_interval_ms is too small\n"); | |
883c10a9 | 1815 | return -EINVAL; |
3bb3dbbd DK |
1816 | } |
1817 | ||
8fcfe088 CC |
1818 | if (!desc->charging_max_duration_ms || |
1819 | !desc->discharging_max_duration_ms) { | |
e5409cbd | 1820 | dev_info(&pdev->dev, "Cannot limit charging duration checking mechanism to prevent overcharge/overheat and control discharging duration\n"); |
8fcfe088 CC |
1821 | desc->charging_max_duration_ms = 0; |
1822 | desc->discharging_max_duration_ms = 0; | |
1823 | } | |
1824 | ||
3bb3dbbd DK |
1825 | platform_set_drvdata(pdev, cm); |
1826 | ||
bb2a95c2 AL |
1827 | memcpy(&cm->charger_psy, &psy_default, sizeof(psy_default)); |
1828 | ||
41468a11 | 1829 | if (!desc->psy_name) |
bb2a95c2 | 1830 | strncpy(cm->psy_name_buf, psy_default.name, PSY_NAME_MAX); |
41468a11 | 1831 | else |
ad3d13ee | 1832 | strncpy(cm->psy_name_buf, desc->psy_name, PSY_NAME_MAX); |
ad3d13ee DK |
1833 | cm->charger_psy.name = cm->psy_name_buf; |
1834 | ||
1835 | /* Allocate for psy properties because they may vary */ | |
883c10a9 JL |
1836 | cm->charger_psy.properties = devm_kzalloc(&pdev->dev, |
1837 | sizeof(enum power_supply_property) | |
ad3d13ee | 1838 | * (ARRAY_SIZE(default_charger_props) + |
883c10a9 JL |
1839 | NUM_CHARGER_PSY_OPTIONAL), GFP_KERNEL); |
1840 | if (!cm->charger_psy.properties) | |
1841 | return -ENOMEM; | |
1842 | ||
ad3d13ee DK |
1843 | memcpy(cm->charger_psy.properties, default_charger_props, |
1844 | sizeof(enum power_supply_property) * | |
1845 | ARRAY_SIZE(default_charger_props)); | |
1846 | cm->charger_psy.num_properties = psy_default.num_properties; | |
1847 | ||
1848 | /* Find which optional psy-properties are available */ | |
bdbe8144 | 1849 | if (!fuel_gauge->get_property(fuel_gauge, |
ad3d13ee DK |
1850 | POWER_SUPPLY_PROP_CHARGE_NOW, &val)) { |
1851 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1852 | POWER_SUPPLY_PROP_CHARGE_NOW; | |
1853 | cm->charger_psy.num_properties++; | |
1854 | } | |
bdbe8144 | 1855 | if (!fuel_gauge->get_property(fuel_gauge, |
ad3d13ee DK |
1856 | POWER_SUPPLY_PROP_CURRENT_NOW, |
1857 | &val)) { | |
1858 | cm->charger_psy.properties[cm->charger_psy.num_properties] = | |
1859 | POWER_SUPPLY_PROP_CURRENT_NOW; | |
1860 | cm->charger_psy.num_properties++; | |
1861 | } | |
bb2a95c2 | 1862 | |
bdbe8144 | 1863 | ret = cm_init_thermal_data(cm, fuel_gauge); |
5c49a625 JL |
1864 | if (ret) { |
1865 | dev_err(&pdev->dev, "Failed to initialize thermal data\n"); | |
1866 | cm->desc->measure_battery_temp = false; | |
ad3d13ee DK |
1867 | } |
1868 | ||
d829dc75 CC |
1869 | INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk); |
1870 | ||
ad3d13ee DK |
1871 | ret = power_supply_register(NULL, &cm->charger_psy); |
1872 | if (ret) { | |
e5409cbd JP |
1873 | dev_err(&pdev->dev, "Cannot register charger-manager with name \"%s\"\n", |
1874 | cm->charger_psy.name); | |
883c10a9 | 1875 | return ret; |
ad3d13ee DK |
1876 | } |
1877 | ||
41468a11 CC |
1878 | /* Register extcon device for charger cable */ |
1879 | ret = charger_manager_register_extcon(cm); | |
1880 | if (ret < 0) { | |
1881 | dev_err(&pdev->dev, "Cannot initialize extcon device\n"); | |
1882 | goto err_reg_extcon; | |
3bb3dbbd DK |
1883 | } |
1884 | ||
41468a11 CC |
1885 | /* Register sysfs entry for charger(regulator) */ |
1886 | ret = charger_manager_register_sysfs(cm); | |
1887 | if (ret < 0) { | |
1888 | dev_err(&pdev->dev, | |
1889 | "Cannot initialize sysfs entry of regulator\n"); | |
1890 | goto err_reg_sysfs; | |
3bb3dbbd DK |
1891 | } |
1892 | ||
1893 | /* Add to the list */ | |
1894 | mutex_lock(&cm_list_mtx); | |
1895 | list_add(&cm->entry, &cm_list); | |
1896 | mutex_unlock(&cm_list_mtx); | |
1897 | ||
dfeccb12 CC |
1898 | /* |
1899 | * Charger-manager is capable of waking up the systme from sleep | |
1900 | * when event is happend through cm_notify_event() | |
1901 | */ | |
1902 | device_init_wakeup(&pdev->dev, true); | |
1903 | device_set_wakeup_capable(&pdev->dev, false); | |
1904 | ||
b1022e24 CC |
1905 | /* |
1906 | * Charger-manager have to check the charging state right after | |
1907 | * tialization of charger-manager and then update current charging | |
1908 | * state. | |
1909 | */ | |
1910 | cm_monitor(); | |
1911 | ||
d829dc75 CC |
1912 | schedule_work(&setup_polling); |
1913 | ||
3bb3dbbd DK |
1914 | return 0; |
1915 | ||
41468a11 | 1916 | err_reg_sysfs: |
3950c786 CC |
1917 | for (i = 0; i < desc->num_charger_regulators; i++) { |
1918 | struct charger_regulator *charger; | |
1919 | ||
1920 | charger = &desc->charger_regulators[i]; | |
1921 | sysfs_remove_group(&cm->charger_psy.dev->kobj, | |
1922 | &charger->attr_g); | |
3950c786 | 1923 | } |
41468a11 CC |
1924 | err_reg_extcon: |
1925 | for (i = 0; i < desc->num_charger_regulators; i++) { | |
1926 | struct charger_regulator *charger; | |
1927 | ||
1928 | charger = &desc->charger_regulators[i]; | |
1929 | for (j = 0; j < charger->num_cables; j++) { | |
bee737bc | 1930 | struct charger_cable *cable = &charger->cables[j]; |
3cc9d269 JL |
1931 | /* Remove notifier block if only edev exists */ |
1932 | if (cable->extcon_dev.edev) | |
1933 | extcon_unregister_interest(&cable->extcon_dev); | |
bee737bc | 1934 | } |
41468a11 | 1935 | |
bee737bc | 1936 | regulator_put(desc->charger_regulators[i].consumer); |
41468a11 | 1937 | } |
bee737bc | 1938 | |
ad3d13ee | 1939 | power_supply_unregister(&cm->charger_psy); |
883c10a9 | 1940 | |
3bb3dbbd DK |
1941 | return ret; |
1942 | } | |
1943 | ||
415ec69f | 1944 | static int charger_manager_remove(struct platform_device *pdev) |
3bb3dbbd DK |
1945 | { |
1946 | struct charger_manager *cm = platform_get_drvdata(pdev); | |
1947 | struct charger_desc *desc = cm->desc; | |
bee737bc CC |
1948 | int i = 0; |
1949 | int j = 0; | |
3bb3dbbd DK |
1950 | |
1951 | /* Remove from the list */ | |
1952 | mutex_lock(&cm_list_mtx); | |
1953 | list_del(&cm->entry); | |
1954 | mutex_unlock(&cm_list_mtx); | |
1955 | ||
2fbb520d TH |
1956 | cancel_work_sync(&setup_polling); |
1957 | cancel_delayed_work_sync(&cm_monitor_work); | |
d829dc75 | 1958 | |
bee737bc CC |
1959 | for (i = 0 ; i < desc->num_charger_regulators ; i++) { |
1960 | struct charger_regulator *charger | |
1961 | = &desc->charger_regulators[i]; | |
1962 | for (j = 0 ; j < charger->num_cables ; j++) { | |
1963 | struct charger_cable *cable = &charger->cables[j]; | |
1964 | extcon_unregister_interest(&cable->extcon_dev); | |
1965 | } | |
1966 | } | |
1967 | ||
1968 | for (i = 0 ; i < desc->num_charger_regulators ; i++) | |
1969 | regulator_put(desc->charger_regulators[i].consumer); | |
1970 | ||
ad3d13ee | 1971 | power_supply_unregister(&cm->charger_psy); |
d829dc75 CC |
1972 | |
1973 | try_charger_enable(cm, false); | |
1974 | ||
3bb3dbbd DK |
1975 | return 0; |
1976 | } | |
1977 | ||
1bbe24d4 | 1978 | static const struct platform_device_id charger_manager_id[] = { |
3bb3dbbd DK |
1979 | { "charger-manager", 0 }, |
1980 | { }, | |
1981 | }; | |
1bbe24d4 | 1982 | MODULE_DEVICE_TABLE(platform, charger_manager_id); |
3bb3dbbd | 1983 | |
dfeccb12 CC |
1984 | static int cm_suspend_noirq(struct device *dev) |
1985 | { | |
1986 | int ret = 0; | |
1987 | ||
1988 | if (device_may_wakeup(dev)) { | |
1989 | device_set_wakeup_capable(dev, false); | |
1990 | ret = -EAGAIN; | |
1991 | } | |
1992 | ||
1993 | return ret; | |
1994 | } | |
1995 | ||
3bb3dbbd DK |
1996 | static int cm_suspend_prepare(struct device *dev) |
1997 | { | |
bb2a95c2 | 1998 | struct charger_manager *cm = dev_get_drvdata(dev); |
3bb3dbbd DK |
1999 | |
2000 | if (!cm_suspended) { | |
2001 | if (rtc_dev) { | |
2002 | struct rtc_time tmp; | |
2003 | unsigned long now; | |
2004 | ||
2005 | rtc_read_alarm(rtc_dev, &rtc_wkalarm_save); | |
2006 | rtc_read_time(rtc_dev, &tmp); | |
2007 | ||
2008 | if (rtc_wkalarm_save.enabled) { | |
2009 | rtc_tm_to_time(&rtc_wkalarm_save.time, | |
2010 | &rtc_wkalarm_save_time); | |
2011 | rtc_tm_to_time(&tmp, &now); | |
2012 | if (now > rtc_wkalarm_save_time) | |
2013 | rtc_wkalarm_save_time = 0; | |
2014 | } else { | |
2015 | rtc_wkalarm_save_time = 0; | |
2016 | } | |
2017 | } | |
2018 | cm_suspended = true; | |
2019 | } | |
2020 | ||
2fbb520d | 2021 | cancel_delayed_work(&cm->fullbatt_vchk_work); |
3bb3dbbd DK |
2022 | cm->status_save_ext_pwr_inserted = is_ext_pwr_online(cm); |
2023 | cm->status_save_batt = is_batt_present(cm); | |
2024 | ||
2025 | if (!cm_rtc_set) { | |
2026 | cm_suspend_duration_ms = 0; | |
2027 | cm_rtc_set = cm_setup_timer(); | |
2028 | } | |
2029 | ||
2030 | return 0; | |
2031 | } | |
2032 | ||
2033 | static void cm_suspend_complete(struct device *dev) | |
2034 | { | |
bb2a95c2 | 2035 | struct charger_manager *cm = dev_get_drvdata(dev); |
3bb3dbbd DK |
2036 | |
2037 | if (cm_suspended) { | |
2038 | if (rtc_dev) { | |
2039 | struct rtc_wkalrm tmp; | |
2040 | ||
2041 | rtc_read_alarm(rtc_dev, &tmp); | |
2042 | rtc_wkalarm_save.pending = tmp.pending; | |
2043 | rtc_set_alarm(rtc_dev, &rtc_wkalarm_save); | |
2044 | } | |
2045 | cm_suspended = false; | |
2046 | cm_rtc_set = false; | |
2047 | } | |
2048 | ||
d829dc75 CC |
2049 | /* Re-enqueue delayed work (fullbatt_vchk_work) */ |
2050 | if (cm->fullbatt_vchk_jiffies_at) { | |
2051 | unsigned long delay = 0; | |
2052 | unsigned long now = jiffies + CM_JIFFIES_SMALL; | |
2053 | ||
2054 | if (time_after_eq(now, cm->fullbatt_vchk_jiffies_at)) { | |
2055 | delay = (unsigned long)((long)now | |
2056 | - (long)(cm->fullbatt_vchk_jiffies_at)); | |
2057 | delay = jiffies_to_msecs(delay); | |
2058 | } else { | |
2059 | delay = 0; | |
2060 | } | |
2061 | ||
2062 | /* | |
2063 | * Account for cm_suspend_duration_ms if | |
2064 | * assume_timer_stops_in_suspend is active | |
2065 | */ | |
2066 | if (g_desc && g_desc->assume_timer_stops_in_suspend) { | |
2067 | if (delay > cm_suspend_duration_ms) | |
2068 | delay -= cm_suspend_duration_ms; | |
2069 | else | |
2070 | delay = 0; | |
2071 | } | |
2072 | ||
2073 | queue_delayed_work(cm_wq, &cm->fullbatt_vchk_work, | |
2074 | msecs_to_jiffies(delay)); | |
2075 | } | |
dfeccb12 | 2076 | device_set_wakeup_capable(cm->dev, false); |
3bb3dbbd DK |
2077 | uevent_notify(cm, NULL); |
2078 | } | |
2079 | ||
2080 | static const struct dev_pm_ops charger_manager_pm = { | |
2081 | .prepare = cm_suspend_prepare, | |
dfeccb12 | 2082 | .suspend_noirq = cm_suspend_noirq, |
3bb3dbbd DK |
2083 | .complete = cm_suspend_complete, |
2084 | }; | |
2085 | ||
2086 | static struct platform_driver charger_manager_driver = { | |
2087 | .driver = { | |
2088 | .name = "charger-manager", | |
3bb3dbbd | 2089 | .pm = &charger_manager_pm, |
856ee611 | 2090 | .of_match_table = charger_manager_match, |
3bb3dbbd DK |
2091 | }, |
2092 | .probe = charger_manager_probe, | |
28ea73f4 | 2093 | .remove = charger_manager_remove, |
3bb3dbbd DK |
2094 | .id_table = charger_manager_id, |
2095 | }; | |
2096 | ||
2097 | static int __init charger_manager_init(void) | |
2098 | { | |
d829dc75 CC |
2099 | cm_wq = create_freezable_workqueue("charger_manager"); |
2100 | INIT_DELAYED_WORK(&cm_monitor_work, cm_monitor_poller); | |
2101 | ||
3bb3dbbd DK |
2102 | return platform_driver_register(&charger_manager_driver); |
2103 | } | |
2104 | late_initcall(charger_manager_init); | |
2105 | ||
2106 | static void __exit charger_manager_cleanup(void) | |
2107 | { | |
d829dc75 CC |
2108 | destroy_workqueue(cm_wq); |
2109 | cm_wq = NULL; | |
2110 | ||
3bb3dbbd DK |
2111 | platform_driver_unregister(&charger_manager_driver); |
2112 | } | |
2113 | module_exit(charger_manager_cleanup); | |
2114 | ||
dfeccb12 CC |
2115 | /** |
2116 | * find_power_supply - find the associated power_supply of charger | |
2117 | * @cm: the Charger Manager representing the battery | |
2118 | * @psy: pointer to instance of charger's power_supply | |
2119 | */ | |
2120 | static bool find_power_supply(struct charger_manager *cm, | |
2121 | struct power_supply *psy) | |
2122 | { | |
2123 | int i; | |
2124 | bool found = false; | |
2125 | ||
cdaf3e15 KK |
2126 | for (i = 0; cm->desc->psy_charger_stat[i]; i++) { |
2127 | if (!strcmp(psy->name, cm->desc->psy_charger_stat[i])) { | |
dfeccb12 CC |
2128 | found = true; |
2129 | break; | |
2130 | } | |
2131 | } | |
2132 | ||
2133 | return found; | |
2134 | } | |
2135 | ||
2136 | /** | |
2137 | * cm_notify_event - charger driver notify Charger Manager of charger event | |
2138 | * @psy: pointer to instance of charger's power_supply | |
2139 | * @type: type of charger event | |
2140 | * @msg: optional message passed to uevent_notify fuction | |
2141 | */ | |
2142 | void cm_notify_event(struct power_supply *psy, enum cm_event_types type, | |
2143 | char *msg) | |
2144 | { | |
2145 | struct charger_manager *cm; | |
2146 | bool found_power_supply = false; | |
2147 | ||
2148 | if (psy == NULL) | |
2149 | return; | |
2150 | ||
2151 | mutex_lock(&cm_list_mtx); | |
2152 | list_for_each_entry(cm, &cm_list, entry) { | |
2153 | found_power_supply = find_power_supply(cm, psy); | |
2154 | if (found_power_supply) | |
2155 | break; | |
2156 | } | |
2157 | mutex_unlock(&cm_list_mtx); | |
2158 | ||
2159 | if (!found_power_supply) | |
2160 | return; | |
2161 | ||
2162 | switch (type) { | |
2163 | case CM_EVENT_BATT_FULL: | |
2164 | fullbatt_handler(cm); | |
2165 | break; | |
2166 | case CM_EVENT_BATT_OUT: | |
2167 | battout_handler(cm); | |
2168 | break; | |
2169 | case CM_EVENT_BATT_IN: | |
2170 | case CM_EVENT_EXT_PWR_IN_OUT ... CM_EVENT_CHG_START_STOP: | |
2171 | misc_event_handler(cm, type); | |
2172 | break; | |
2173 | case CM_EVENT_UNKNOWN: | |
2174 | case CM_EVENT_OTHERS: | |
2175 | uevent_notify(cm, msg ? msg : default_event_names[type]); | |
2176 | break; | |
2177 | default: | |
e5409cbd | 2178 | dev_err(cm->dev, "%s: type not specified\n", __func__); |
dfeccb12 CC |
2179 | break; |
2180 | } | |
2181 | } | |
2182 | EXPORT_SYMBOL_GPL(cm_notify_event); | |
2183 | ||
3bb3dbbd DK |
2184 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); |
2185 | MODULE_DESCRIPTION("Charger Manager"); | |
2186 | MODULE_LICENSE("GPL"); |