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342d765e MR |
1 | /* |
2 | * Battery charger driver for Dialog Semiconductor DA9030 | |
3 | * | |
4 | * Copyright (C) 2008 Compulab, Ltd. | |
5 | * Mike Rapoport <mike@compulab.co.il> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/kernel.h> | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
342d765e MR |
14 | #include <linux/init.h> |
15 | #include <linux/types.h> | |
16 | #include <linux/device.h> | |
17 | #include <linux/workqueue.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/power_supply.h> | |
21 | #include <linux/mfd/da903x.h> | |
22 | ||
23 | #include <linux/debugfs.h> | |
24 | #include <linux/seq_file.h> | |
25 | ||
342d765e MR |
26 | #define DA9030_FAULT_LOG 0x0a |
27 | #define DA9030_FAULT_LOG_OVER_TEMP (1 << 7) | |
28 | #define DA9030_FAULT_LOG_VBAT_OVER (1 << 4) | |
29 | ||
30 | #define DA9030_CHARGE_CONTROL 0x28 | |
31 | #define DA9030_CHRG_CHARGER_ENABLE (1 << 7) | |
32 | ||
33 | #define DA9030_ADC_MAN_CONTROL 0x30 | |
34 | #define DA9030_ADC_TBATREF_ENABLE (1 << 5) | |
35 | #define DA9030_ADC_LDO_INT_ENABLE (1 << 4) | |
36 | ||
37 | #define DA9030_ADC_AUTO_CONTROL 0x31 | |
38 | #define DA9030_ADC_TBAT_ENABLE (1 << 5) | |
39 | #define DA9030_ADC_VBAT_IN_TXON (1 << 4) | |
40 | #define DA9030_ADC_VCH_ENABLE (1 << 3) | |
41 | #define DA9030_ADC_ICH_ENABLE (1 << 2) | |
42 | #define DA9030_ADC_VBAT_ENABLE (1 << 1) | |
43 | #define DA9030_ADC_AUTO_SLEEP_ENABLE (1 << 0) | |
44 | ||
45 | #define DA9030_VBATMON 0x32 | |
46 | #define DA9030_VBATMONTXON 0x33 | |
47 | #define DA9030_TBATHIGHP 0x34 | |
48 | #define DA9030_TBATHIGHN 0x35 | |
49 | #define DA9030_TBATLOW 0x36 | |
50 | ||
51 | #define DA9030_VBAT_RES 0x41 | |
52 | #define DA9030_VBATMIN_RES 0x42 | |
53 | #define DA9030_VBATMINTXON_RES 0x43 | |
54 | #define DA9030_ICHMAX_RES 0x44 | |
55 | #define DA9030_ICHMIN_RES 0x45 | |
56 | #define DA9030_ICHAVERAGE_RES 0x46 | |
57 | #define DA9030_VCHMAX_RES 0x47 | |
58 | #define DA9030_VCHMIN_RES 0x48 | |
59 | #define DA9030_TBAT_RES 0x49 | |
60 | ||
61 | struct da9030_adc_res { | |
62 | uint8_t vbat_res; | |
63 | uint8_t vbatmin_res; | |
64 | uint8_t vbatmintxon; | |
65 | uint8_t ichmax_res; | |
66 | uint8_t ichmin_res; | |
67 | uint8_t ichaverage_res; | |
68 | uint8_t vchmax_res; | |
69 | uint8_t vchmin_res; | |
70 | uint8_t tbat_res; | |
71 | uint8_t adc_in4_res; | |
72 | uint8_t adc_in5_res; | |
73 | }; | |
74 | ||
75 | struct da9030_battery_thresholds { | |
76 | int tbat_low; | |
77 | int tbat_high; | |
78 | int tbat_restart; | |
79 | ||
80 | int vbat_low; | |
81 | int vbat_crit; | |
82 | int vbat_charge_start; | |
83 | int vbat_charge_stop; | |
84 | int vbat_charge_restart; | |
85 | ||
86 | int vcharge_min; | |
87 | int vcharge_max; | |
88 | }; | |
89 | ||
90 | struct da9030_charger { | |
91 | struct power_supply psy; | |
92 | ||
93 | struct device *master; | |
94 | ||
95 | struct da9030_adc_res adc; | |
96 | struct delayed_work work; | |
97 | unsigned int interval; | |
98 | ||
99 | struct power_supply_info *battery_info; | |
100 | ||
101 | struct da9030_battery_thresholds thresholds; | |
102 | ||
103 | unsigned int charge_milliamp; | |
104 | unsigned int charge_millivolt; | |
105 | ||
106 | /* charger status */ | |
107 | bool chdet; | |
108 | uint8_t fault; | |
109 | int mA; | |
110 | int mV; | |
111 | bool is_on; | |
112 | ||
113 | struct notifier_block nb; | |
114 | ||
115 | /* platform callbacks for battery low and critical events */ | |
116 | void (*battery_low)(void); | |
117 | void (*battery_critical)(void); | |
118 | ||
119 | struct dentry *debug_file; | |
120 | }; | |
121 | ||
122 | static inline int da9030_reg_to_mV(int reg) | |
123 | { | |
124 | return ((reg * 2650) >> 8) + 2650; | |
125 | } | |
126 | ||
127 | static inline int da9030_millivolt_to_reg(int mV) | |
128 | { | |
129 | return ((mV - 2650) << 8) / 2650; | |
130 | } | |
131 | ||
132 | static inline int da9030_reg_to_mA(int reg) | |
133 | { | |
134 | return ((reg * 24000) >> 8) / 15; | |
135 | } | |
136 | ||
137 | #ifdef CONFIG_DEBUG_FS | |
138 | static int bat_debug_show(struct seq_file *s, void *data) | |
139 | { | |
140 | struct da9030_charger *charger = s->private; | |
141 | ||
142 | seq_printf(s, "charger is %s\n", charger->is_on ? "on" : "off"); | |
143 | if (charger->chdet) { | |
144 | seq_printf(s, "iset = %dmA, vset = %dmV\n", | |
145 | charger->mA, charger->mV); | |
146 | } | |
147 | ||
148 | seq_printf(s, "vbat_res = %d (%dmV)\n", | |
149 | charger->adc.vbat_res, | |
150 | da9030_reg_to_mV(charger->adc.vbat_res)); | |
151 | seq_printf(s, "vbatmin_res = %d (%dmV)\n", | |
152 | charger->adc.vbatmin_res, | |
153 | da9030_reg_to_mV(charger->adc.vbatmin_res)); | |
154 | seq_printf(s, "vbatmintxon = %d (%dmV)\n", | |
155 | charger->adc.vbatmintxon, | |
156 | da9030_reg_to_mV(charger->adc.vbatmintxon)); | |
157 | seq_printf(s, "ichmax_res = %d (%dmA)\n", | |
158 | charger->adc.ichmax_res, | |
159 | da9030_reg_to_mV(charger->adc.ichmax_res)); | |
160 | seq_printf(s, "ichmin_res = %d (%dmA)\n", | |
161 | charger->adc.ichmin_res, | |
162 | da9030_reg_to_mA(charger->adc.ichmin_res)); | |
163 | seq_printf(s, "ichaverage_res = %d (%dmA)\n", | |
164 | charger->adc.ichaverage_res, | |
165 | da9030_reg_to_mA(charger->adc.ichaverage_res)); | |
166 | seq_printf(s, "vchmax_res = %d (%dmV)\n", | |
167 | charger->adc.vchmax_res, | |
168 | da9030_reg_to_mA(charger->adc.vchmax_res)); | |
169 | seq_printf(s, "vchmin_res = %d (%dmV)\n", | |
170 | charger->adc.vchmin_res, | |
171 | da9030_reg_to_mV(charger->adc.vchmin_res)); | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | static int debug_open(struct inode *inode, struct file *file) | |
177 | { | |
178 | return single_open(file, bat_debug_show, inode->i_private); | |
179 | } | |
180 | ||
181 | static const struct file_operations bat_debug_fops = { | |
182 | .open = debug_open, | |
183 | .read = seq_read, | |
184 | .llseek = seq_lseek, | |
185 | .release = single_release, | |
186 | }; | |
187 | ||
188 | static struct dentry *da9030_bat_create_debugfs(struct da9030_charger *charger) | |
189 | { | |
190 | charger->debug_file = debugfs_create_file("charger", 0666, 0, charger, | |
191 | &bat_debug_fops); | |
192 | return charger->debug_file; | |
193 | } | |
194 | ||
195 | static void da9030_bat_remove_debugfs(struct da9030_charger *charger) | |
196 | { | |
197 | debugfs_remove(charger->debug_file); | |
198 | } | |
199 | #else | |
200 | static inline struct dentry *da9030_bat_create_debugfs(struct da9030_charger *charger) | |
201 | { | |
202 | return NULL; | |
203 | } | |
204 | static inline void da9030_bat_remove_debugfs(struct da9030_charger *charger) | |
205 | { | |
206 | } | |
207 | #endif | |
208 | ||
209 | static inline void da9030_read_adc(struct da9030_charger *charger, | |
210 | struct da9030_adc_res *adc) | |
211 | { | |
212 | da903x_reads(charger->master, DA9030_VBAT_RES, | |
213 | sizeof(*adc), (uint8_t *)adc); | |
214 | } | |
215 | ||
216 | static void da9030_charger_update_state(struct da9030_charger *charger) | |
217 | { | |
218 | uint8_t val; | |
219 | ||
220 | da903x_read(charger->master, DA9030_CHARGE_CONTROL, &val); | |
221 | charger->is_on = (val & DA9030_CHRG_CHARGER_ENABLE) ? 1 : 0; | |
222 | charger->mA = ((val >> 3) & 0xf) * 100; | |
223 | charger->mV = (val & 0x7) * 50 + 4000; | |
224 | ||
225 | da9030_read_adc(charger, &charger->adc); | |
226 | da903x_read(charger->master, DA9030_FAULT_LOG, &charger->fault); | |
227 | charger->chdet = da903x_query_status(charger->master, | |
228 | DA9030_STATUS_CHDET); | |
229 | } | |
230 | ||
231 | static void da9030_set_charge(struct da9030_charger *charger, int on) | |
232 | { | |
233 | uint8_t val; | |
234 | ||
235 | if (on) { | |
236 | val = DA9030_CHRG_CHARGER_ENABLE; | |
237 | val |= (charger->charge_milliamp / 100) << 3; | |
238 | val |= (charger->charge_millivolt - 4000) / 50; | |
239 | charger->is_on = 1; | |
240 | } else { | |
241 | val = 0; | |
242 | charger->is_on = 0; | |
243 | } | |
244 | ||
245 | da903x_write(charger->master, DA9030_CHARGE_CONTROL, val); | |
a35d01a5 MR |
246 | |
247 | power_supply_changed(&charger->psy); | |
342d765e MR |
248 | } |
249 | ||
250 | static void da9030_charger_check_state(struct da9030_charger *charger) | |
251 | { | |
252 | da9030_charger_update_state(charger); | |
253 | ||
254 | /* we wake or boot with external power on */ | |
255 | if (!charger->is_on) { | |
256 | if ((charger->chdet) && | |
257 | (charger->adc.vbat_res < | |
258 | charger->thresholds.vbat_charge_start)) { | |
259 | da9030_set_charge(charger, 1); | |
260 | } | |
261 | } else { | |
a35d01a5 MR |
262 | /* Charger has been pulled out */ |
263 | if (!charger->chdet) { | |
264 | da9030_set_charge(charger, 0); | |
265 | return; | |
266 | } | |
267 | ||
342d765e MR |
268 | if (charger->adc.vbat_res >= |
269 | charger->thresholds.vbat_charge_stop) { | |
270 | da9030_set_charge(charger, 0); | |
271 | da903x_write(charger->master, DA9030_VBATMON, | |
272 | charger->thresholds.vbat_charge_restart); | |
273 | } else if (charger->adc.vbat_res > | |
274 | charger->thresholds.vbat_low) { | |
275 | /* we are charging and passed LOW_THRESH, | |
276 | so upate DA9030 VBAT threshold | |
277 | */ | |
278 | da903x_write(charger->master, DA9030_VBATMON, | |
279 | charger->thresholds.vbat_low); | |
280 | } | |
281 | if (charger->adc.vchmax_res > charger->thresholds.vcharge_max || | |
282 | charger->adc.vchmin_res < charger->thresholds.vcharge_min || | |
283 | /* Tempreture readings are negative */ | |
284 | charger->adc.tbat_res < charger->thresholds.tbat_high || | |
285 | charger->adc.tbat_res > charger->thresholds.tbat_low) { | |
286 | /* disable charger */ | |
287 | da9030_set_charge(charger, 0); | |
288 | } | |
289 | } | |
290 | } | |
291 | ||
292 | static void da9030_charging_monitor(struct work_struct *work) | |
293 | { | |
294 | struct da9030_charger *charger; | |
295 | ||
296 | charger = container_of(work, struct da9030_charger, work.work); | |
297 | ||
298 | da9030_charger_check_state(charger); | |
299 | ||
300 | /* reschedule for the next time */ | |
301 | schedule_delayed_work(&charger->work, charger->interval); | |
302 | } | |
303 | ||
304 | static enum power_supply_property da9030_battery_props[] = { | |
305 | POWER_SUPPLY_PROP_MODEL_NAME, | |
306 | POWER_SUPPLY_PROP_STATUS, | |
307 | POWER_SUPPLY_PROP_HEALTH, | |
308 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
309 | POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, | |
310 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
311 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
312 | POWER_SUPPLY_PROP_CURRENT_AVG, | |
313 | }; | |
314 | ||
315 | static void da9030_battery_check_status(struct da9030_charger *charger, | |
316 | union power_supply_propval *val) | |
317 | { | |
318 | if (charger->chdet) { | |
319 | if (charger->is_on) | |
320 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
321 | else | |
322 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
323 | } else { | |
324 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
325 | } | |
326 | } | |
327 | ||
328 | static void da9030_battery_check_health(struct da9030_charger *charger, | |
329 | union power_supply_propval *val) | |
330 | { | |
331 | if (charger->fault & DA9030_FAULT_LOG_OVER_TEMP) | |
332 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
333 | else if (charger->fault & DA9030_FAULT_LOG_VBAT_OVER) | |
334 | val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
335 | else | |
336 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
337 | } | |
338 | ||
339 | static int da9030_battery_get_property(struct power_supply *psy, | |
340 | enum power_supply_property psp, | |
341 | union power_supply_propval *val) | |
342 | { | |
343 | struct da9030_charger *charger; | |
344 | charger = container_of(psy, struct da9030_charger, psy); | |
345 | ||
346 | switch (psp) { | |
347 | case POWER_SUPPLY_PROP_STATUS: | |
348 | da9030_battery_check_status(charger, val); | |
349 | break; | |
350 | case POWER_SUPPLY_PROP_HEALTH: | |
351 | da9030_battery_check_health(charger, val); | |
352 | break; | |
353 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
354 | val->intval = charger->battery_info->technology; | |
355 | break; | |
356 | case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: | |
357 | val->intval = charger->battery_info->voltage_max_design; | |
358 | break; | |
359 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: | |
360 | val->intval = charger->battery_info->voltage_min_design; | |
361 | break; | |
362 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
363 | val->intval = da9030_reg_to_mV(charger->adc.vbat_res) * 1000; | |
364 | break; | |
365 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
366 | val->intval = | |
367 | da9030_reg_to_mA(charger->adc.ichaverage_res) * 1000; | |
368 | break; | |
369 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
370 | val->strval = charger->battery_info->name; | |
371 | break; | |
372 | default: | |
373 | break; | |
374 | } | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
379 | static void da9030_battery_vbat_event(struct da9030_charger *charger) | |
380 | { | |
381 | da9030_read_adc(charger, &charger->adc); | |
382 | ||
383 | if (charger->is_on) | |
384 | return; | |
385 | ||
386 | if (charger->adc.vbat_res < charger->thresholds.vbat_low) { | |
387 | /* set VBAT threshold for critical */ | |
388 | da903x_write(charger->master, DA9030_VBATMON, | |
389 | charger->thresholds.vbat_crit); | |
390 | if (charger->battery_low) | |
391 | charger->battery_low(); | |
392 | } else if (charger->adc.vbat_res < | |
393 | charger->thresholds.vbat_crit) { | |
394 | /* notify the system of battery critical */ | |
395 | if (charger->battery_critical) | |
396 | charger->battery_critical(); | |
397 | } | |
398 | } | |
399 | ||
400 | static int da9030_battery_event(struct notifier_block *nb, unsigned long event, | |
401 | void *data) | |
402 | { | |
403 | struct da9030_charger *charger = | |
404 | container_of(nb, struct da9030_charger, nb); | |
342d765e MR |
405 | |
406 | switch (event) { | |
407 | case DA9030_EVENT_CHDET: | |
a35d01a5 MR |
408 | cancel_delayed_work_sync(&charger->work); |
409 | schedule_work(&charger->work.work); | |
342d765e MR |
410 | break; |
411 | case DA9030_EVENT_VBATMON: | |
412 | da9030_battery_vbat_event(charger); | |
413 | break; | |
414 | case DA9030_EVENT_CHIOVER: | |
415 | case DA9030_EVENT_TBAT: | |
416 | da9030_set_charge(charger, 0); | |
417 | break; | |
418 | } | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | static void da9030_battery_convert_thresholds(struct da9030_charger *charger, | |
424 | struct da9030_battery_info *pdata) | |
425 | { | |
426 | charger->thresholds.tbat_low = pdata->tbat_low; | |
427 | charger->thresholds.tbat_high = pdata->tbat_high; | |
428 | charger->thresholds.tbat_restart = pdata->tbat_restart; | |
429 | ||
430 | charger->thresholds.vbat_low = | |
431 | da9030_millivolt_to_reg(pdata->vbat_low); | |
432 | charger->thresholds.vbat_crit = | |
433 | da9030_millivolt_to_reg(pdata->vbat_crit); | |
434 | charger->thresholds.vbat_charge_start = | |
435 | da9030_millivolt_to_reg(pdata->vbat_charge_start); | |
436 | charger->thresholds.vbat_charge_stop = | |
437 | da9030_millivolt_to_reg(pdata->vbat_charge_stop); | |
438 | charger->thresholds.vbat_charge_restart = | |
439 | da9030_millivolt_to_reg(pdata->vbat_charge_restart); | |
440 | ||
441 | charger->thresholds.vcharge_min = | |
442 | da9030_millivolt_to_reg(pdata->vcharge_min); | |
443 | charger->thresholds.vcharge_max = | |
444 | da9030_millivolt_to_reg(pdata->vcharge_max); | |
445 | } | |
446 | ||
447 | static void da9030_battery_setup_psy(struct da9030_charger *charger) | |
448 | { | |
449 | struct power_supply *psy = &charger->psy; | |
450 | struct power_supply_info *info = charger->battery_info; | |
451 | ||
452 | psy->name = info->name; | |
453 | psy->use_for_apm = info->use_for_apm; | |
454 | psy->type = POWER_SUPPLY_TYPE_BATTERY; | |
455 | psy->get_property = da9030_battery_get_property; | |
456 | ||
457 | psy->properties = da9030_battery_props; | |
458 | psy->num_properties = ARRAY_SIZE(da9030_battery_props); | |
459 | }; | |
460 | ||
461 | static int da9030_battery_charger_init(struct da9030_charger *charger) | |
462 | { | |
463 | char v[5]; | |
464 | int ret; | |
465 | ||
466 | v[0] = v[1] = charger->thresholds.vbat_low; | |
467 | v[2] = charger->thresholds.tbat_high; | |
468 | v[3] = charger->thresholds.tbat_restart; | |
469 | v[4] = charger->thresholds.tbat_low; | |
470 | ||
471 | ret = da903x_writes(charger->master, DA9030_VBATMON, 5, v); | |
472 | if (ret) | |
473 | return ret; | |
474 | ||
475 | /* | |
476 | * Enable reference voltage supply for ADC from the LDO_INTERNAL | |
477 | * regulator. Must be set before ADC measurements can be made. | |
478 | */ | |
479 | ret = da903x_write(charger->master, DA9030_ADC_MAN_CONTROL, | |
480 | DA9030_ADC_LDO_INT_ENABLE | | |
481 | DA9030_ADC_TBATREF_ENABLE); | |
482 | if (ret) | |
483 | return ret; | |
484 | ||
485 | /* enable auto ADC measuremnts */ | |
486 | return da903x_write(charger->master, DA9030_ADC_AUTO_CONTROL, | |
487 | DA9030_ADC_TBAT_ENABLE | DA9030_ADC_VBAT_IN_TXON | | |
488 | DA9030_ADC_VCH_ENABLE | DA9030_ADC_ICH_ENABLE | | |
489 | DA9030_ADC_VBAT_ENABLE | | |
490 | DA9030_ADC_AUTO_SLEEP_ENABLE); | |
491 | } | |
492 | ||
493 | static int da9030_battery_probe(struct platform_device *pdev) | |
494 | { | |
495 | struct da9030_charger *charger; | |
496 | struct da9030_battery_info *pdata = pdev->dev.platform_data; | |
497 | int ret; | |
498 | ||
499 | if (pdata == NULL) | |
500 | return -EINVAL; | |
501 | ||
502 | if (pdata->charge_milliamp >= 1500 || | |
503 | pdata->charge_millivolt < 4000 || | |
504 | pdata->charge_millivolt > 4350) | |
505 | return -EINVAL; | |
506 | ||
507 | charger = kzalloc(sizeof(*charger), GFP_KERNEL); | |
508 | if (charger == NULL) | |
509 | return -ENOMEM; | |
510 | ||
511 | charger->master = pdev->dev.parent; | |
512 | ||
5324dc0e | 513 | /* 10 seconds between monitor runs unless platform defines other |
342d765e MR |
514 | interval */ |
515 | charger->interval = msecs_to_jiffies( | |
516 | (pdata->batmon_interval ? : 10) * 1000); | |
517 | ||
518 | charger->charge_milliamp = pdata->charge_milliamp; | |
519 | charger->charge_millivolt = pdata->charge_millivolt; | |
520 | charger->battery_info = pdata->battery_info; | |
521 | charger->battery_low = pdata->battery_low; | |
522 | charger->battery_critical = pdata->battery_critical; | |
523 | ||
524 | da9030_battery_convert_thresholds(charger, pdata); | |
525 | ||
526 | ret = da9030_battery_charger_init(charger); | |
527 | if (ret) | |
528 | goto err_charger_init; | |
529 | ||
530 | INIT_DELAYED_WORK(&charger->work, da9030_charging_monitor); | |
531 | schedule_delayed_work(&charger->work, charger->interval); | |
532 | ||
533 | charger->nb.notifier_call = da9030_battery_event; | |
534 | ret = da903x_register_notifier(charger->master, &charger->nb, | |
535 | DA9030_EVENT_CHDET | | |
536 | DA9030_EVENT_VBATMON | | |
537 | DA9030_EVENT_CHIOVER | | |
538 | DA9030_EVENT_TBAT); | |
539 | if (ret) | |
540 | goto err_notifier; | |
541 | ||
542 | da9030_battery_setup_psy(charger); | |
543 | ret = power_supply_register(&pdev->dev, &charger->psy); | |
544 | if (ret) | |
545 | goto err_ps_register; | |
546 | ||
547 | charger->debug_file = da9030_bat_create_debugfs(charger); | |
548 | platform_set_drvdata(pdev, charger); | |
549 | return 0; | |
550 | ||
551 | err_ps_register: | |
552 | da903x_unregister_notifier(charger->master, &charger->nb, | |
553 | DA9030_EVENT_CHDET | DA9030_EVENT_VBATMON | | |
554 | DA9030_EVENT_CHIOVER | DA9030_EVENT_TBAT); | |
555 | err_notifier: | |
556 | cancel_delayed_work(&charger->work); | |
557 | ||
558 | err_charger_init: | |
559 | kfree(charger); | |
560 | ||
561 | return ret; | |
562 | } | |
563 | ||
564 | static int da9030_battery_remove(struct platform_device *dev) | |
565 | { | |
566 | struct da9030_charger *charger = platform_get_drvdata(dev); | |
567 | ||
568 | da9030_bat_remove_debugfs(charger); | |
569 | ||
570 | da903x_unregister_notifier(charger->master, &charger->nb, | |
571 | DA9030_EVENT_CHDET | DA9030_EVENT_VBATMON | | |
572 | DA9030_EVENT_CHIOVER | DA9030_EVENT_TBAT); | |
a35d01a5 MR |
573 | cancel_delayed_work_sync(&charger->work); |
574 | da9030_set_charge(charger, 0); | |
342d765e MR |
575 | power_supply_unregister(&charger->psy); |
576 | ||
577 | kfree(charger); | |
578 | ||
579 | return 0; | |
580 | } | |
581 | ||
582 | static struct platform_driver da903x_battery_driver = { | |
583 | .driver = { | |
584 | .name = "da903x-battery", | |
585 | .owner = THIS_MODULE, | |
586 | }, | |
587 | .probe = da9030_battery_probe, | |
588 | .remove = da9030_battery_remove, | |
589 | }; | |
590 | ||
591 | static int da903x_battery_init(void) | |
592 | { | |
593 | return platform_driver_register(&da903x_battery_driver); | |
594 | } | |
595 | ||
596 | static void da903x_battery_exit(void) | |
597 | { | |
598 | platform_driver_unregister(&da903x_battery_driver); | |
599 | } | |
600 | ||
601 | module_init(da903x_battery_init); | |
602 | module_exit(da903x_battery_exit); | |
603 | ||
604 | MODULE_DESCRIPTION("DA9030 battery charger driver"); | |
605 | MODULE_AUTHOR("Mike Rapoport, CompuLab"); | |
606 | MODULE_LICENSE("GPL"); |