Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1

Linux/drivers/power/88pm860x_charger.c

  1 /*
  2  * Battery driver for Marvell 88PM860x PMIC
  3  *
  4  * Copyright (c) 2012 Marvell International Ltd.
  5  * Author:      Jett Zhou <jtzhou@marvell.com>
  6  *              Haojian Zhuang <haojian.zhuang@marvell.com>
  7  *
  8  * This program is free software; you can redistribute it and/or modify
  9  * it under the terms of the GNU General Public License version 2 as
 10  * published by the Free Software Foundation.
 11  */
 12 
 13 #include <linux/kernel.h>
 14 #include <linux/module.h>
 15 #include <linux/platform_device.h>
 16 #include <linux/slab.h>
 17 #include <linux/power_supply.h>
 18 #include <linux/mfd/88pm860x.h>
 19 #include <linux/delay.h>
 20 #include <linux/uaccess.h>
 21 #include <asm/div64.h>
 22 
 23 /* bit definitions of Status Query Interface 2 */
 24 #define STATUS2_CHG             (1 << 2)
 25 
 26 /* bit definitions of Reset Out Register */
 27 #define RESET_SW_PD             (1 << 7)
 28 
 29 /* bit definitions of PreReg 1 */
 30 #define PREREG1_90MA            (0x0)
 31 #define PREREG1_180MA           (0x1)
 32 #define PREREG1_450MA           (0x4)
 33 #define PREREG1_540MA           (0x5)
 34 #define PREREG1_1350MA          (0xE)
 35 #define PREREG1_VSYS_4_5V       (3 << 4)
 36 
 37 /* bit definitions of Charger Control 1 Register */
 38 #define CC1_MODE_OFF            (0)
 39 #define CC1_MODE_PRECHARGE      (1)
 40 #define CC1_MODE_FASTCHARGE     (2)
 41 #define CC1_MODE_PULSECHARGE    (3)
 42 #define CC1_ITERM_20MA          (0 << 2)
 43 #define CC1_ITERM_60MA          (2 << 2)
 44 #define CC1_VFCHG_4_2V          (9 << 4)
 45 
 46 /* bit definitions of Charger Control 2 Register */
 47 #define CC2_ICHG_100MA          (0x1)
 48 #define CC2_ICHG_500MA          (0x9)
 49 #define CC2_ICHG_1000MA         (0x13)
 50 
 51 /* bit definitions of Charger Control 3 Register */
 52 #define CC3_180MIN_TIMEOUT      (0x6 << 4)
 53 #define CC3_270MIN_TIMEOUT      (0x7 << 4)
 54 #define CC3_360MIN_TIMEOUT      (0xA << 4)
 55 #define CC3_DISABLE_TIMEOUT     (0xF << 4)
 56 
 57 /* bit definitions of Charger Control 4 Register */
 58 #define CC4_IPRE_40MA           (7)
 59 #define CC4_VPCHG_3_2V          (3 << 4)
 60 #define CC4_IFCHG_MON_EN        (1 << 6)
 61 #define CC4_BTEMP_MON_EN        (1 << 7)
 62 
 63 /* bit definitions of Charger Control 6 Register */
 64 #define CC6_BAT_OV_EN           (1 << 2)
 65 #define CC6_BAT_UV_EN           (1 << 3)
 66 #define CC6_UV_VBAT_SET         (0x3 << 6)      /* 2.8v */
 67 
 68 /* bit definitions of Charger Control 7 Register */
 69 #define CC7_BAT_REM_EN          (1 << 3)
 70 #define CC7_IFSM_EN             (1 << 7)
 71 
 72 /* bit definitions of Measurement Enable 1 Register */
 73 #define MEAS1_VBAT              (1 << 0)
 74 
 75 /* bit definitions of Measurement Enable 3 Register */
 76 #define MEAS3_IBAT_EN           (1 << 0)
 77 #define MEAS3_CC_EN             (1 << 2)
 78 
 79 #define FSM_INIT                0
 80 #define FSM_DISCHARGE           1
 81 #define FSM_PRECHARGE           2
 82 #define FSM_FASTCHARGE          3
 83 
 84 #define PRECHARGE_THRESHOLD     3100
 85 #define POWEROFF_THRESHOLD      3400
 86 #define CHARGE_THRESHOLD        4000
 87 #define DISCHARGE_THRESHOLD     4180
 88 
 89 /* over-temperature on PM8606 setting */
 90 #define OVER_TEMP_FLAG          (1 << 6)
 91 #define OVTEMP_AUTORECOVER      (1 << 3)
 92 
 93 /* over-voltage protect on vchg setting mv */
 94 #define VCHG_NORMAL_LOW         4200
 95 #define VCHG_NORMAL_CHECK       5800
 96 #define VCHG_NORMAL_HIGH        6000
 97 #define VCHG_OVP_LOW            5500
 98 
 99 struct pm860x_charger_info {
100         struct pm860x_chip *chip;
101         struct i2c_client *i2c;
102         struct i2c_client *i2c_8606;
103         struct device *dev;
104 
105         struct power_supply *usb;
106         struct mutex lock;
107         int irq_nums;
108         int irq[7];
109         unsigned state:3;       /* fsm state */
110         unsigned online:1;      /* usb charger */
111         unsigned present:1;     /* battery present */
112         unsigned allowed:1;
113 };
114 
115 static char *pm860x_supplied_to[] = {
116         "battery-monitor",
117 };
118 
119 static int measure_vchg(struct pm860x_charger_info *info, int *data)
120 {
121         unsigned char buf[2];
122         int ret = 0;
123 
124         ret = pm860x_bulk_read(info->i2c, PM8607_VCHG_MEAS1, 2, buf);
125         if (ret < 0)
126                 return ret;
127 
128         *data = ((buf[0] & 0xff) << 4) | (buf[1] & 0x0f);
129         /* V_BATT_MEAS(mV) = value * 5 * 1.8 * 1000 / (2^12) */
130         *data = ((*data & 0xfff) * 9 * 125) >> 9;
131 
132         dev_dbg(info->dev, "%s, vchg: %d mv\n", __func__, *data);
133 
134         return ret;
135 }
136 
137 static void set_vchg_threshold(struct pm860x_charger_info *info,
138                                int min, int max)
139 {
140         int data;
141 
142         /* (tmp << 8) * / 5 / 1800 */
143         if (min <= 0)
144                 data = 0;
145         else
146                 data = (min << 5) / 1125;
147         pm860x_reg_write(info->i2c, PM8607_VCHG_LOWTH, data);
148         dev_dbg(info->dev, "VCHG_LOWTH:%dmv, 0x%x\n", min, data);
149 
150         if (max <= 0)
151                 data = 0xff;
152         else
153                 data = (max << 5) / 1125;
154         pm860x_reg_write(info->i2c, PM8607_VCHG_HIGHTH, data);
155         dev_dbg(info->dev, "VCHG_HIGHTH:%dmv, 0x%x\n", max, data);
156 
157 }
158 
159 static void set_vbatt_threshold(struct pm860x_charger_info *info,
160                                 int min, int max)
161 {
162         int data;
163 
164         /* (tmp << 8) * 3 / 1800 */
165         if (min <= 0)
166                 data = 0;
167         else
168                 data = (min << 5) / 675;
169         pm860x_reg_write(info->i2c, PM8607_VBAT_LOWTH, data);
170         dev_dbg(info->dev, "VBAT Min:%dmv, LOWTH:0x%x\n", min, data);
171 
172         if (max <= 0)
173                 data = 0xff;
174         else
175                 data = (max << 5) / 675;
176         pm860x_reg_write(info->i2c, PM8607_VBAT_HIGHTH, data);
177         dev_dbg(info->dev, "VBAT Max:%dmv, HIGHTH:0x%x\n", max, data);
178 
179         return;
180 }
181 
182 static int start_precharge(struct pm860x_charger_info *info)
183 {
184         int ret;
185 
186         dev_dbg(info->dev, "Start Pre-charging!\n");
187         set_vbatt_threshold(info, 0, 0);
188 
189         ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
190                                PREREG1_1350MA | PREREG1_VSYS_4_5V);
191         if (ret < 0)
192                 goto out;
193         /* stop charging */
194         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
195                               CC1_MODE_OFF);
196         if (ret < 0)
197                 goto out;
198         /* set 270 minutes timeout */
199         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
200                               CC3_270MIN_TIMEOUT);
201         if (ret < 0)
202                 goto out;
203         /* set precharge current, termination voltage, IBAT & TBAT monitor */
204         ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL4,
205                                CC4_IPRE_40MA | CC4_VPCHG_3_2V |
206                                CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
207         if (ret < 0)
208                 goto out;
209         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
210                               CC7_BAT_REM_EN | CC7_IFSM_EN,
211                               CC7_BAT_REM_EN | CC7_IFSM_EN);
212         if (ret < 0)
213                 goto out;
214         /* trigger precharge */
215         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
216                               CC1_MODE_PRECHARGE);
217 out:
218         return ret;
219 }
220 
221 static int start_fastcharge(struct pm860x_charger_info *info)
222 {
223         int ret;
224 
225         dev_dbg(info->dev, "Start Fast-charging!\n");
226 
227         /* set fastcharge termination current & voltage, disable charging */
228         ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL1,
229                                CC1_MODE_OFF | CC1_ITERM_60MA |
230                                CC1_VFCHG_4_2V);
231         if (ret < 0)
232                 goto out;
233         ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
234                                PREREG1_540MA | PREREG1_VSYS_4_5V);
235         if (ret < 0)
236                 goto out;
237         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL2, 0x1f,
238                               CC2_ICHG_500MA);
239         if (ret < 0)
240                 goto out;
241         /* set 270 minutes timeout */
242         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
243                               CC3_270MIN_TIMEOUT);
244         if (ret < 0)
245                 goto out;
246         /* set IBAT & TBAT monitor */
247         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL4,
248                               CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN,
249                               CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
250         if (ret < 0)
251                 goto out;
252         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL6,
253                               CC6_BAT_OV_EN | CC6_BAT_UV_EN |
254                               CC6_UV_VBAT_SET,
255                               CC6_BAT_OV_EN | CC6_BAT_UV_EN |
256                               CC6_UV_VBAT_SET);
257         if (ret < 0)
258                 goto out;
259         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
260                               CC7_BAT_REM_EN | CC7_IFSM_EN,
261                               CC7_BAT_REM_EN | CC7_IFSM_EN);
262         if (ret < 0)
263                 goto out;
264         /* launch fast-charge */
265         ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
266                               CC1_MODE_FASTCHARGE);
267         /* vchg threshold setting */
268         set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_NORMAL_HIGH);
269 out:
270         return ret;
271 }
272 
273 static void stop_charge(struct pm860x_charger_info *info, int vbatt)
274 {
275         dev_dbg(info->dev, "Stop charging!\n");
276         pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, CC1_MODE_OFF);
277         if (vbatt > CHARGE_THRESHOLD && info->online)
278                 set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
279 }
280 
281 static void power_off_notification(struct pm860x_charger_info *info)
282 {
283         dev_dbg(info->dev, "Power-off notification!\n");
284 }
285 
286 static int set_charging_fsm(struct pm860x_charger_info *info)
287 {
288         struct power_supply *psy;
289         union power_supply_propval data;
290         unsigned char fsm_state[][16] = { "init", "discharge", "precharge",
291                 "fastcharge",
292         };
293         int ret;
294         int vbatt;
295 
296         psy = power_supply_get_by_name(pm860x_supplied_to[0]);
297         if (!psy)
298                 return -EINVAL;
299         ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
300                         &data);
301         if (ret) {
302                 power_supply_put(psy);
303                 return ret;
304         }
305         vbatt = data.intval / 1000;
306 
307         ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_PRESENT, &data);
308         if (ret) {
309                 power_supply_put(psy);
310                 return ret;
311         }
312         power_supply_put(psy);
313 
314         mutex_lock(&info->lock);
315         info->present = data.intval;
316 
317         dev_dbg(info->dev, "Entering FSM:%s, Charger:%s, Battery:%s, "
318                 "Allowed:%d\n",
319                 &fsm_state[info->state][0],
320                 (info->online) ? "online" : "N/A",
321                 (info->present) ? "present" : "N/A", info->allowed);
322         dev_dbg(info->dev, "set_charging_fsm:vbatt:%d(mV)\n", vbatt);
323 
324         switch (info->state) {
325         case FSM_INIT:
326                 if (info->online && info->present && info->allowed) {
327                         if (vbatt < PRECHARGE_THRESHOLD) {
328                                 info->state = FSM_PRECHARGE;
329                                 start_precharge(info);
330                         } else if (vbatt > DISCHARGE_THRESHOLD) {
331                                 info->state = FSM_DISCHARGE;
332                                 stop_charge(info, vbatt);
333                         } else if (vbatt < DISCHARGE_THRESHOLD) {
334                                 info->state = FSM_FASTCHARGE;
335                                 start_fastcharge(info);
336                         }
337                 } else {
338                         if (vbatt < POWEROFF_THRESHOLD) {
339                                 power_off_notification(info);
340                         } else {
341                                 info->state = FSM_DISCHARGE;
342                                 stop_charge(info, vbatt);
343                         }
344                 }
345                 break;
346         case FSM_PRECHARGE:
347                 if (info->online && info->present && info->allowed) {
348                         if (vbatt > PRECHARGE_THRESHOLD) {
349                                 info->state = FSM_FASTCHARGE;
350                                 start_fastcharge(info);
351                         }
352                 } else {
353                         info->state = FSM_DISCHARGE;
354                         stop_charge(info, vbatt);
355                 }
356                 break;
357         case FSM_FASTCHARGE:
358                 if (info->online && info->present && info->allowed) {
359                         if (vbatt < PRECHARGE_THRESHOLD) {
360                                 info->state = FSM_PRECHARGE;
361                                 start_precharge(info);
362                         }
363                 } else {
364                         info->state = FSM_DISCHARGE;
365                         stop_charge(info, vbatt);
366                 }
367                 break;
368         case FSM_DISCHARGE:
369                 if (info->online && info->present && info->allowed) {
370                         if (vbatt < PRECHARGE_THRESHOLD) {
371                                 info->state = FSM_PRECHARGE;
372                                 start_precharge(info);
373                         } else if (vbatt < DISCHARGE_THRESHOLD) {
374                                 info->state = FSM_FASTCHARGE;
375                                 start_fastcharge(info);
376                         }
377                 } else {
378                         if (vbatt < POWEROFF_THRESHOLD)
379                                 power_off_notification(info);
380                         else if (vbatt > CHARGE_THRESHOLD && info->online)
381                                 set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
382                 }
383                 break;
384         default:
385                 dev_warn(info->dev, "FSM meets wrong state:%d\n",
386                          info->state);
387                 break;
388         }
389         dev_dbg(info->dev,
390                 "Out FSM:%s, Charger:%s, Battery:%s, Allowed:%d\n",
391                 &fsm_state[info->state][0],
392                 (info->online) ? "online" : "N/A",
393                 (info->present) ? "present" : "N/A", info->allowed);
394         mutex_unlock(&info->lock);
395 
396         return 0;
397 }
398 
399 static irqreturn_t pm860x_charger_handler(int irq, void *data)
400 {
401         struct pm860x_charger_info *info = data;
402         int ret;
403 
404         mutex_lock(&info->lock);
405         ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
406         if (ret < 0) {
407                 mutex_unlock(&info->lock);
408                 goto out;
409         }
410         if (ret & STATUS2_CHG) {
411                 info->online = 1;
412                 info->allowed = 1;
413         } else {
414                 info->online = 0;
415                 info->allowed = 0;
416         }
417         mutex_unlock(&info->lock);
418         dev_dbg(info->dev, "%s, Charger:%s, Allowed:%d\n", __func__,
419                 (info->online) ? "online" : "N/A", info->allowed);
420 
421         set_charging_fsm(info);
422 
423         power_supply_changed(info->usb);
424 out:
425         return IRQ_HANDLED;
426 }
427 
428 static irqreturn_t pm860x_temp_handler(int irq, void *data)
429 {
430         struct power_supply *psy;
431         struct pm860x_charger_info *info = data;
432         union power_supply_propval temp;
433         int value;
434         int ret;
435 
436         psy = power_supply_get_by_name(pm860x_supplied_to[0]);
437         if (!psy)
438                 goto out;
439         ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &temp);
440         if (ret)
441                 goto out;
442         value = temp.intval / 10;
443 
444         mutex_lock(&info->lock);
445         /* Temperature < -10 C or >40 C, Will not allow charge */
446         if (value < -10 || value > 40)
447                 info->allowed = 0;
448         else
449                 info->allowed = 1;
450         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
451         mutex_unlock(&info->lock);
452 
453         set_charging_fsm(info);
454 out:
455         power_supply_put(psy);
456         return IRQ_HANDLED;
457 }
458 
459 static irqreturn_t pm860x_exception_handler(int irq, void *data)
460 {
461         struct pm860x_charger_info *info = data;
462 
463         mutex_lock(&info->lock);
464         info->allowed = 0;
465         mutex_unlock(&info->lock);
466         dev_dbg(info->dev, "%s, irq: %d\n", __func__, irq);
467 
468         set_charging_fsm(info);
469         return IRQ_HANDLED;
470 }
471 
472 static irqreturn_t pm860x_done_handler(int irq, void *data)
473 {
474         struct pm860x_charger_info *info = data;
475         struct power_supply *psy;
476         union power_supply_propval val;
477         int ret;
478         int vbatt;
479 
480         mutex_lock(&info->lock);
481         /* pre-charge done, will transimit to fast-charge stage */
482         if (info->state == FSM_PRECHARGE) {
483                 info->allowed = 1;
484                 goto out;
485         }
486         /*
487          * Fast charge done, delay to read
488          * the correct status of CHG_DET.
489          */
490         mdelay(5);
491         info->allowed = 0;
492         psy = power_supply_get_by_name(pm860x_supplied_to[0]);
493         if (!psy)
494                 goto out;
495         ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
496                         &val);
497         if (ret)
498                 goto out_psy_put;
499         vbatt = val.intval / 1000;
500         /*
501          * CHG_DONE interrupt is faster than CHG_DET interrupt when
502          * plug in/out usb, So we can not rely on info->online, we
503          * need check pm8607 status register to check usb is online
504          * or not, then we can decide it is real charge done
505          * automatically or it is triggered by usb plug out;
506          */
507         ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
508         if (ret < 0)
509                 goto out_psy_put;
510         if (vbatt > CHARGE_THRESHOLD && ret & STATUS2_CHG)
511                 power_supply_set_property(psy, POWER_SUPPLY_PROP_CHARGE_FULL,
512                                 &val);
513 
514 out_psy_put:
515         power_supply_put(psy);
516 out:
517         mutex_unlock(&info->lock);
518         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
519         set_charging_fsm(info);
520 
521         return IRQ_HANDLED;
522 }
523 
524 static irqreturn_t pm860x_vbattery_handler(int irq, void *data)
525 {
526         struct pm860x_charger_info *info = data;
527 
528         mutex_lock(&info->lock);
529 
530         set_vbatt_threshold(info, 0, 0);
531 
532         if (info->present && info->online)
533                 info->allowed = 1;
534         else
535                 info->allowed = 0;
536         mutex_unlock(&info->lock);
537         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
538 
539         set_charging_fsm(info);
540 
541         return IRQ_HANDLED;
542 }
543 
544 static irqreturn_t pm860x_vchg_handler(int irq, void *data)
545 {
546         struct pm860x_charger_info *info = data;
547         int vchg = 0;
548 
549         if (info->present)
550                 goto out;
551 
552         measure_vchg(info, &vchg);
553 
554         mutex_lock(&info->lock);
555         if (!info->online) {
556                 int status;
557                 /* check if over-temp on pm8606 or not */
558                 status = pm860x_reg_read(info->i2c_8606, PM8606_FLAGS);
559                 if (status & OVER_TEMP_FLAG) {
560                         /* clear over temp flag and set auto recover */
561                         pm860x_set_bits(info->i2c_8606, PM8606_FLAGS,
562                                         OVER_TEMP_FLAG, OVER_TEMP_FLAG);
563                         pm860x_set_bits(info->i2c_8606,
564                                         PM8606_VSYS,
565                                         OVTEMP_AUTORECOVER,
566                                         OVTEMP_AUTORECOVER);
567                         dev_dbg(info->dev,
568                                 "%s, pm8606 over-temp occurred\n", __func__);
569                 }
570         }
571 
572         if (vchg > VCHG_NORMAL_CHECK) {
573                 set_vchg_threshold(info, VCHG_OVP_LOW, 0);
574                 info->allowed = 0;
575                 dev_dbg(info->dev,
576                         "%s,pm8607 over-vchg occurred,vchg = %dmv\n",
577                         __func__, vchg);
578         } else if (vchg < VCHG_OVP_LOW) {
579                 set_vchg_threshold(info, VCHG_NORMAL_LOW,
580                                    VCHG_NORMAL_HIGH);
581                 info->allowed = 1;
582                 dev_dbg(info->dev,
583                         "%s,pm8607 over-vchg recover,vchg = %dmv\n",
584                         __func__, vchg);
585         }
586         mutex_unlock(&info->lock);
587 
588         dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
589         set_charging_fsm(info);
590 out:
591         return IRQ_HANDLED;
592 }
593 
594 static int pm860x_usb_get_prop(struct power_supply *psy,
595                                enum power_supply_property psp,
596                                union power_supply_propval *val)
597 {
598         struct pm860x_charger_info *info = power_supply_get_drvdata(psy);
599 
600         switch (psp) {
601         case POWER_SUPPLY_PROP_STATUS:
602                 if (info->state == FSM_FASTCHARGE ||
603                                 info->state == FSM_PRECHARGE)
604                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
605                 else
606                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
607                 break;
608         case POWER_SUPPLY_PROP_ONLINE:
609                 val->intval = info->online;
610                 break;
611         default:
612                 return -ENODEV;
613         }
614         return 0;
615 }
616 
617 static enum power_supply_property pm860x_usb_props[] = {
618         POWER_SUPPLY_PROP_STATUS,
619         POWER_SUPPLY_PROP_ONLINE,
620 };
621 
622 static int pm860x_init_charger(struct pm860x_charger_info *info)
623 {
624         int ret;
625 
626         ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
627         if (ret < 0)
628                 return ret;
629 
630         mutex_lock(&info->lock);
631         info->state = FSM_INIT;
632         if (ret & STATUS2_CHG) {
633                 info->online = 1;
634                 info->allowed = 1;
635         } else {
636                 info->online = 0;
637                 info->allowed = 0;
638         }
639         mutex_unlock(&info->lock);
640 
641         set_charging_fsm(info);
642         return 0;
643 }
644 
645 static struct pm860x_irq_desc {
646         const char *name;
647         irqreturn_t (*handler)(int irq, void *data);
648 } pm860x_irq_descs[] = {
649         { "usb supply detect", pm860x_charger_handler },
650         { "charge done", pm860x_done_handler },
651         { "charge timeout", pm860x_exception_handler },
652         { "charge fault", pm860x_exception_handler },
653         { "temperature", pm860x_temp_handler },
654         { "vbatt", pm860x_vbattery_handler },
655         { "vchg", pm860x_vchg_handler },
656 };
657 
658 static const struct power_supply_desc pm860x_charger_desc = {
659         .name           = "usb",
660         .type           = POWER_SUPPLY_TYPE_USB,
661         .properties     = pm860x_usb_props,
662         .num_properties = ARRAY_SIZE(pm860x_usb_props),
663         .get_property   = pm860x_usb_get_prop,
664 };
665 
666 static int pm860x_charger_probe(struct platform_device *pdev)
667 {
668         struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
669         struct power_supply_config psy_cfg = {};
670         struct pm860x_charger_info *info;
671         int ret;
672         int count;
673         int i;
674         int j;
675 
676         info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
677         if (!info)
678                 return -ENOMEM;
679 
680         count = pdev->num_resources;
681         for (i = 0, j = 0; i < count; i++) {
682                 info->irq[j] = platform_get_irq(pdev, i);
683                 if (info->irq[j] < 0)
684                         continue;
685                 j++;
686         }
687         info->irq_nums = j;
688 
689         info->chip = chip;
690         info->i2c =
691             (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
692         info->i2c_8606 =
693             (chip->id == CHIP_PM8607) ? chip->companion : chip->client;
694         if (!info->i2c_8606) {
695                 dev_err(&pdev->dev, "Missed I2C address of 88PM8606!\n");
696                 ret = -EINVAL;
697                 goto out;
698         }
699         info->dev = &pdev->dev;
700 
701         /* set init value for the case we are not using battery */
702         set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_OVP_LOW);
703 
704         mutex_init(&info->lock);
705         platform_set_drvdata(pdev, info);
706 
707         psy_cfg.drv_data = info;
708         psy_cfg.supplied_to = pm860x_supplied_to;
709         psy_cfg.num_supplicants = ARRAY_SIZE(pm860x_supplied_to);
710         info->usb = power_supply_register(&pdev->dev, &pm860x_charger_desc,
711                                           &psy_cfg);
712         if (IS_ERR(info->usb)) {
713                 ret = PTR_ERR(info->usb);
714                 goto out;
715         }
716 
717         pm860x_init_charger(info);
718 
719         for (i = 0; i < ARRAY_SIZE(info->irq); i++) {
720                 ret = request_threaded_irq(info->irq[i], NULL,
721                         pm860x_irq_descs[i].handler,
722                         IRQF_ONESHOT, pm860x_irq_descs[i].name, info);
723                 if (ret < 0) {
724                         dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
725                                 info->irq[i], ret);
726                         goto out_irq;
727                 }
728         }
729         return 0;
730 
731 out_irq:
732         power_supply_unregister(info->usb);
733         while (--i >= 0)
734                 free_irq(info->irq[i], info);
735 out:
736         return ret;
737 }
738 
739 static int pm860x_charger_remove(struct platform_device *pdev)
740 {
741         struct pm860x_charger_info *info = platform_get_drvdata(pdev);
742         int i;
743 
744         power_supply_unregister(info->usb);
745         free_irq(info->irq[0], info);
746         for (i = 0; i < info->irq_nums; i++)
747                 free_irq(info->irq[i], info);
748         return 0;
749 }
750 
751 static struct platform_driver pm860x_charger_driver = {
752         .driver = {
753                    .name = "88pm860x-charger",
754         },
755         .probe = pm860x_charger_probe,
756         .remove = pm860x_charger_remove,
757 };
758 module_platform_driver(pm860x_charger_driver);
759 
760 MODULE_DESCRIPTION("Marvell 88PM860x Charger driver");
761 MODULE_LICENSE("GPL");
762 

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