1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Battery driver for Marvell 88PM860x PMIC
4 *
5 * Copyright (c) 2012 Marvell International Ltd.
6 * Author: Jett Zhou <jtzhou@marvell.com>
7 * Haojian Zhuang <haojian.zhuang@marvell.com>
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/slab.h>
14 #include <linux/power_supply.h>
15 #include <linux/mfd/88pm860x.h>
16 #include <linux/delay.h>
17 #include <linux/uaccess.h>
18 #include <asm/div64.h>
19
20 /* bit definitions of Status Query Interface 2 */
21 #define STATUS2_CHG (1 << 2)
22
23 /* bit definitions of Reset Out Register */
24 #define RESET_SW_PD (1 << 7)
25
26 /* bit definitions of PreReg 1 */
27 #define PREREG1_90MA (0x0)
28 #define PREREG1_180MA (0x1)
29 #define PREREG1_450MA (0x4)
30 #define PREREG1_540MA (0x5)
31 #define PREREG1_1350MA (0xE)
32 #define PREREG1_VSYS_4_5V (3 << 4)
33
34 /* bit definitions of Charger Control 1 Register */
35 #define CC1_MODE_OFF (0)
36 #define CC1_MODE_PRECHARGE (1)
37 #define CC1_MODE_FASTCHARGE (2)
38 #define CC1_MODE_PULSECHARGE (3)
39 #define CC1_ITERM_20MA (0 << 2)
40 #define CC1_ITERM_60MA (2 << 2)
41 #define CC1_VFCHG_4_2V (9 << 4)
42
43 /* bit definitions of Charger Control 2 Register */
44 #define CC2_ICHG_100MA (0x1)
45 #define CC2_ICHG_500MA (0x9)
46 #define CC2_ICHG_1000MA (0x13)
47
48 /* bit definitions of Charger Control 3 Register */
49 #define CC3_180MIN_TIMEOUT (0x6 << 4)
50 #define CC3_270MIN_TIMEOUT (0x7 << 4)
51 #define CC3_360MIN_TIMEOUT (0xA << 4)
52 #define CC3_DISABLE_TIMEOUT (0xF << 4)
53
54 /* bit definitions of Charger Control 4 Register */
55 #define CC4_IPRE_40MA (7)
56 #define CC4_VPCHG_3_2V (3 << 4)
57 #define CC4_IFCHG_MON_EN (1 << 6)
58 #define CC4_BTEMP_MON_EN (1 << 7)
59
60 /* bit definitions of Charger Control 6 Register */
61 #define CC6_BAT_OV_EN (1 << 2)
62 #define CC6_BAT_UV_EN (1 << 3)
63 #define CC6_UV_VBAT_SET (0x3 << 6) /* 2.8v */
64
65 /* bit definitions of Charger Control 7 Register */
66 #define CC7_BAT_REM_EN (1 << 3)
67 #define CC7_IFSM_EN (1 << 7)
68
69 /* bit definitions of Measurement Enable 1 Register */
70 #define MEAS1_VBAT (1 << 0)
71
72 /* bit definitions of Measurement Enable 3 Register */
73 #define MEAS3_IBAT_EN (1 << 0)
74 #define MEAS3_CC_EN (1 << 2)
75
76 #define FSM_INIT 0
77 #define FSM_DISCHARGE 1
78 #define FSM_PRECHARGE 2
79 #define FSM_FASTCHARGE 3
80
81 #define PRECHARGE_THRESHOLD 3100
82 #define POWEROFF_THRESHOLD 3400
83 #define CHARGE_THRESHOLD 4000
84 #define DISCHARGE_THRESHOLD 4180
85
86 /* over-temperature on PM8606 setting */
87 #define OVER_TEMP_FLAG (1 << 6)
88 #define OVTEMP_AUTORECOVER (1 << 3)
89
90 /* over-voltage protect on vchg setting mv */
91 #define VCHG_NORMAL_LOW 4200
92 #define VCHG_NORMAL_CHECK 5800
93 #define VCHG_NORMAL_HIGH 6000
94 #define VCHG_OVP_LOW 5500
95
96 struct pm860x_charger_info {
97 struct pm860x_chip *chip;
98 struct i2c_client *i2c;
99 struct i2c_client *i2c_8606;
100 struct device *dev;
101
102 struct power_supply *usb;
103 struct mutex lock;
104 int irq_nums;
105 int irq[7];
106 unsigned state:3; /* fsm state */
107 unsigned online:1; /* usb charger */
108 unsigned present:1; /* battery present */
109 unsigned allowed:1;
110 };
111
112 static char *pm860x_supplied_to[] = {
113 "battery-monitor",
114 };
115
measure_vchg(struct pm860x_charger_info * info,int * data)116 static int measure_vchg(struct pm860x_charger_info *info, int *data)
117 {
118 unsigned char buf[2];
119 int ret = 0;
120
121 ret = pm860x_bulk_read(info->i2c, PM8607_VCHG_MEAS1, 2, buf);
122 if (ret < 0)
123 return ret;
124
125 *data = ((buf[0] & 0xff) << 4) | (buf[1] & 0x0f);
126 /* V_BATT_MEAS(mV) = value * 5 * 1.8 * 1000 / (2^12) */
127 *data = ((*data & 0xfff) * 9 * 125) >> 9;
128
129 dev_dbg(info->dev, "%s, vchg: %d mv\n", __func__, *data);
130
131 return ret;
132 }
133
set_vchg_threshold(struct pm860x_charger_info * info,int min,int max)134 static void set_vchg_threshold(struct pm860x_charger_info *info,
135 int min, int max)
136 {
137 int data;
138
139 /* (tmp << 8) * / 5 / 1800 */
140 if (min <= 0)
141 data = 0;
142 else
143 data = (min << 5) / 1125;
144 pm860x_reg_write(info->i2c, PM8607_VCHG_LOWTH, data);
145 dev_dbg(info->dev, "VCHG_LOWTH:%dmv, 0x%x\n", min, data);
146
147 if (max <= 0)
148 data = 0xff;
149 else
150 data = (max << 5) / 1125;
151 pm860x_reg_write(info->i2c, PM8607_VCHG_HIGHTH, data);
152 dev_dbg(info->dev, "VCHG_HIGHTH:%dmv, 0x%x\n", max, data);
153
154 }
155
set_vbatt_threshold(struct pm860x_charger_info * info,int min,int max)156 static void set_vbatt_threshold(struct pm860x_charger_info *info,
157 int min, int max)
158 {
159 int data;
160
161 /* (tmp << 8) * 3 / 1800 */
162 if (min <= 0)
163 data = 0;
164 else
165 data = (min << 5) / 675;
166 pm860x_reg_write(info->i2c, PM8607_VBAT_LOWTH, data);
167 dev_dbg(info->dev, "VBAT Min:%dmv, LOWTH:0x%x\n", min, data);
168
169 if (max <= 0)
170 data = 0xff;
171 else
172 data = (max << 5) / 675;
173 pm860x_reg_write(info->i2c, PM8607_VBAT_HIGHTH, data);
174 dev_dbg(info->dev, "VBAT Max:%dmv, HIGHTH:0x%x\n", max, data);
175
176 return;
177 }
178
start_precharge(struct pm860x_charger_info * info)179 static int start_precharge(struct pm860x_charger_info *info)
180 {
181 int ret;
182
183 dev_dbg(info->dev, "Start Pre-charging!\n");
184 set_vbatt_threshold(info, 0, 0);
185
186 ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
187 PREREG1_1350MA | PREREG1_VSYS_4_5V);
188 if (ret < 0)
189 goto out;
190 /* stop charging */
191 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
192 CC1_MODE_OFF);
193 if (ret < 0)
194 goto out;
195 /* set 270 minutes timeout */
196 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
197 CC3_270MIN_TIMEOUT);
198 if (ret < 0)
199 goto out;
200 /* set precharge current, termination voltage, IBAT & TBAT monitor */
201 ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL4,
202 CC4_IPRE_40MA | CC4_VPCHG_3_2V |
203 CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
204 if (ret < 0)
205 goto out;
206 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
207 CC7_BAT_REM_EN | CC7_IFSM_EN,
208 CC7_BAT_REM_EN | CC7_IFSM_EN);
209 if (ret < 0)
210 goto out;
211 /* trigger precharge */
212 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
213 CC1_MODE_PRECHARGE);
214 out:
215 return ret;
216 }
217
start_fastcharge(struct pm860x_charger_info * info)218 static int start_fastcharge(struct pm860x_charger_info *info)
219 {
220 int ret;
221
222 dev_dbg(info->dev, "Start Fast-charging!\n");
223
224 /* set fastcharge termination current & voltage, disable charging */
225 ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL1,
226 CC1_MODE_OFF | CC1_ITERM_60MA |
227 CC1_VFCHG_4_2V);
228 if (ret < 0)
229 goto out;
230 ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
231 PREREG1_540MA | PREREG1_VSYS_4_5V);
232 if (ret < 0)
233 goto out;
234 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL2, 0x1f,
235 CC2_ICHG_500MA);
236 if (ret < 0)
237 goto out;
238 /* set 270 minutes timeout */
239 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
240 CC3_270MIN_TIMEOUT);
241 if (ret < 0)
242 goto out;
243 /* set IBAT & TBAT monitor */
244 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL4,
245 CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN,
246 CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
247 if (ret < 0)
248 goto out;
249 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL6,
250 CC6_BAT_OV_EN | CC6_BAT_UV_EN |
251 CC6_UV_VBAT_SET,
252 CC6_BAT_OV_EN | CC6_BAT_UV_EN |
253 CC6_UV_VBAT_SET);
254 if (ret < 0)
255 goto out;
256 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
257 CC7_BAT_REM_EN | CC7_IFSM_EN,
258 CC7_BAT_REM_EN | CC7_IFSM_EN);
259 if (ret < 0)
260 goto out;
261 /* launch fast-charge */
262 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
263 CC1_MODE_FASTCHARGE);
264 /* vchg threshold setting */
265 set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_NORMAL_HIGH);
266 out:
267 return ret;
268 }
269
stop_charge(struct pm860x_charger_info * info,int vbatt)270 static void stop_charge(struct pm860x_charger_info *info, int vbatt)
271 {
272 dev_dbg(info->dev, "Stop charging!\n");
273 pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, CC1_MODE_OFF);
274 if (vbatt > CHARGE_THRESHOLD && info->online)
275 set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
276 }
277
power_off_notification(struct pm860x_charger_info * info)278 static void power_off_notification(struct pm860x_charger_info *info)
279 {
280 dev_dbg(info->dev, "Power-off notification!\n");
281 }
282
set_charging_fsm(struct pm860x_charger_info * info)283 static int set_charging_fsm(struct pm860x_charger_info *info)
284 {
285 struct power_supply *psy;
286 union power_supply_propval data;
287 unsigned char fsm_state[][16] = { "init", "discharge", "precharge",
288 "fastcharge",
289 };
290 int ret;
291 int vbatt;
292
293 psy = power_supply_get_by_name(pm860x_supplied_to[0]);
294 if (!psy)
295 return -EINVAL;
296 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
297 &data);
298 if (ret) {
299 power_supply_put(psy);
300 return ret;
301 }
302 vbatt = data.intval / 1000;
303
304 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_PRESENT, &data);
305 if (ret) {
306 power_supply_put(psy);
307 return ret;
308 }
309 power_supply_put(psy);
310
311 mutex_lock(&info->lock);
312 info->present = data.intval;
313
314 dev_dbg(info->dev, "Entering FSM:%s, Charger:%s, Battery:%s, "
315 "Allowed:%d\n",
316 &fsm_state[info->state][0],
317 (info->online) ? "online" : "N/A",
318 (info->present) ? "present" : "N/A", info->allowed);
319 dev_dbg(info->dev, "set_charging_fsm:vbatt:%d(mV)\n", vbatt);
320
321 switch (info->state) {
322 case FSM_INIT:
323 if (info->online && info->present && info->allowed) {
324 if (vbatt < PRECHARGE_THRESHOLD) {
325 info->state = FSM_PRECHARGE;
326 start_precharge(info);
327 } else if (vbatt > DISCHARGE_THRESHOLD) {
328 info->state = FSM_DISCHARGE;
329 stop_charge(info, vbatt);
330 } else if (vbatt < DISCHARGE_THRESHOLD) {
331 info->state = FSM_FASTCHARGE;
332 start_fastcharge(info);
333 }
334 } else {
335 if (vbatt < POWEROFF_THRESHOLD) {
336 power_off_notification(info);
337 } else {
338 info->state = FSM_DISCHARGE;
339 stop_charge(info, vbatt);
340 }
341 }
342 break;
343 case FSM_PRECHARGE:
344 if (info->online && info->present && info->allowed) {
345 if (vbatt > PRECHARGE_THRESHOLD) {
346 info->state = FSM_FASTCHARGE;
347 start_fastcharge(info);
348 }
349 } else {
350 info->state = FSM_DISCHARGE;
351 stop_charge(info, vbatt);
352 }
353 break;
354 case FSM_FASTCHARGE:
355 if (info->online && info->present && info->allowed) {
356 if (vbatt < PRECHARGE_THRESHOLD) {
357 info->state = FSM_PRECHARGE;
358 start_precharge(info);
359 }
360 } else {
361 info->state = FSM_DISCHARGE;
362 stop_charge(info, vbatt);
363 }
364 break;
365 case FSM_DISCHARGE:
366 if (info->online && info->present && info->allowed) {
367 if (vbatt < PRECHARGE_THRESHOLD) {
368 info->state = FSM_PRECHARGE;
369 start_precharge(info);
370 } else if (vbatt < DISCHARGE_THRESHOLD) {
371 info->state = FSM_FASTCHARGE;
372 start_fastcharge(info);
373 }
374 } else {
375 if (vbatt < POWEROFF_THRESHOLD)
376 power_off_notification(info);
377 else if (vbatt > CHARGE_THRESHOLD && info->online)
378 set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
379 }
380 break;
381 default:
382 dev_warn(info->dev, "FSM meets wrong state:%d\n",
383 info->state);
384 break;
385 }
386 dev_dbg(info->dev,
387 "Out FSM:%s, Charger:%s, Battery:%s, Allowed:%d\n",
388 &fsm_state[info->state][0],
389 (info->online) ? "online" : "N/A",
390 (info->present) ? "present" : "N/A", info->allowed);
391 mutex_unlock(&info->lock);
392
393 return 0;
394 }
395
pm860x_charger_handler(int irq,void * data)396 static irqreturn_t pm860x_charger_handler(int irq, void *data)
397 {
398 struct pm860x_charger_info *info = data;
399 int ret;
400
401 mutex_lock(&info->lock);
402 ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
403 if (ret < 0) {
404 mutex_unlock(&info->lock);
405 goto out;
406 }
407 if (ret & STATUS2_CHG) {
408 info->online = 1;
409 info->allowed = 1;
410 } else {
411 info->online = 0;
412 info->allowed = 0;
413 }
414 mutex_unlock(&info->lock);
415 dev_dbg(info->dev, "%s, Charger:%s, Allowed:%d\n", __func__,
416 (info->online) ? "online" : "N/A", info->allowed);
417
418 set_charging_fsm(info);
419
420 power_supply_changed(info->usb);
421 out:
422 return IRQ_HANDLED;
423 }
424
pm860x_temp_handler(int irq,void * data)425 static irqreturn_t pm860x_temp_handler(int irq, void *data)
426 {
427 struct power_supply *psy;
428 struct pm860x_charger_info *info = data;
429 union power_supply_propval temp;
430 int value;
431 int ret;
432
433 psy = power_supply_get_by_name(pm860x_supplied_to[0]);
434 if (!psy)
435 return IRQ_HANDLED;
436 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &temp);
437 if (ret)
438 goto out;
439 value = temp.intval / 10;
440
441 mutex_lock(&info->lock);
442 /* Temperature < -10 C or >40 C, Will not allow charge */
443 if (value < -10 || value > 40)
444 info->allowed = 0;
445 else
446 info->allowed = 1;
447 dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
448 mutex_unlock(&info->lock);
449
450 set_charging_fsm(info);
451 out:
452 power_supply_put(psy);
453 return IRQ_HANDLED;
454 }
455
pm860x_exception_handler(int irq,void * data)456 static irqreturn_t pm860x_exception_handler(int irq, void *data)
457 {
458 struct pm860x_charger_info *info = data;
459
460 mutex_lock(&info->lock);
461 info->allowed = 0;
462 mutex_unlock(&info->lock);
463 dev_dbg(info->dev, "%s, irq: %d\n", __func__, irq);
464
465 set_charging_fsm(info);
466 return IRQ_HANDLED;
467 }
468
pm860x_done_handler(int irq,void * data)469 static irqreturn_t pm860x_done_handler(int irq, void *data)
470 {
471 struct pm860x_charger_info *info = data;
472 struct power_supply *psy;
473 union power_supply_propval val;
474 int ret;
475 int vbatt;
476
477 mutex_lock(&info->lock);
478 /* pre-charge done, will transimit to fast-charge stage */
479 if (info->state == FSM_PRECHARGE) {
480 info->allowed = 1;
481 goto out;
482 }
483 /*
484 * Fast charge done, delay to read
485 * the correct status of CHG_DET.
486 */
487 mdelay(5);
488 info->allowed = 0;
489 psy = power_supply_get_by_name(pm860x_supplied_to[0]);
490 if (!psy)
491 goto out;
492 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
493 &val);
494 if (ret)
495 goto out_psy_put;
496 vbatt = val.intval / 1000;
497 /*
498 * CHG_DONE interrupt is faster than CHG_DET interrupt when
499 * plug in/out usb, So we can not rely on info->online, we
500 * need check pm8607 status register to check usb is online
501 * or not, then we can decide it is real charge done
502 * automatically or it is triggered by usb plug out;
503 */
504 ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
505 if (ret < 0)
506 goto out_psy_put;
507 if (vbatt > CHARGE_THRESHOLD && ret & STATUS2_CHG)
508 power_supply_set_property(psy, POWER_SUPPLY_PROP_CHARGE_FULL,
509 &val);
510
511 out_psy_put:
512 power_supply_put(psy);
513 out:
514 mutex_unlock(&info->lock);
515 dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
516 set_charging_fsm(info);
517
518 return IRQ_HANDLED;
519 }
520
pm860x_vbattery_handler(int irq,void * data)521 static irqreturn_t pm860x_vbattery_handler(int irq, void *data)
522 {
523 struct pm860x_charger_info *info = data;
524
525 mutex_lock(&info->lock);
526
527 set_vbatt_threshold(info, 0, 0);
528
529 if (info->present && info->online)
530 info->allowed = 1;
531 else
532 info->allowed = 0;
533 mutex_unlock(&info->lock);
534 dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
535
536 set_charging_fsm(info);
537
538 return IRQ_HANDLED;
539 }
540
pm860x_vchg_handler(int irq,void * data)541 static irqreturn_t pm860x_vchg_handler(int irq, void *data)
542 {
543 struct pm860x_charger_info *info = data;
544 int vchg = 0;
545
546 if (info->present)
547 goto out;
548
549 measure_vchg(info, &vchg);
550
551 mutex_lock(&info->lock);
552 if (!info->online) {
553 int status;
554 /* check if over-temp on pm8606 or not */
555 status = pm860x_reg_read(info->i2c_8606, PM8606_FLAGS);
556 if (status & OVER_TEMP_FLAG) {
557 /* clear over temp flag and set auto recover */
558 pm860x_set_bits(info->i2c_8606, PM8606_FLAGS,
559 OVER_TEMP_FLAG, OVER_TEMP_FLAG);
560 pm860x_set_bits(info->i2c_8606,
561 PM8606_VSYS,
562 OVTEMP_AUTORECOVER,
563 OVTEMP_AUTORECOVER);
564 dev_dbg(info->dev,
565 "%s, pm8606 over-temp occurred\n", __func__);
566 }
567 }
568
569 if (vchg > VCHG_NORMAL_CHECK) {
570 set_vchg_threshold(info, VCHG_OVP_LOW, 0);
571 info->allowed = 0;
572 dev_dbg(info->dev,
573 "%s,pm8607 over-vchg occurred,vchg = %dmv\n",
574 __func__, vchg);
575 } else if (vchg < VCHG_OVP_LOW) {
576 set_vchg_threshold(info, VCHG_NORMAL_LOW,
577 VCHG_NORMAL_HIGH);
578 info->allowed = 1;
579 dev_dbg(info->dev,
580 "%s,pm8607 over-vchg recover,vchg = %dmv\n",
581 __func__, vchg);
582 }
583 mutex_unlock(&info->lock);
584
585 dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
586 set_charging_fsm(info);
587 out:
588 return IRQ_HANDLED;
589 }
590
pm860x_usb_get_prop(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)591 static int pm860x_usb_get_prop(struct power_supply *psy,
592 enum power_supply_property psp,
593 union power_supply_propval *val)
594 {
595 struct pm860x_charger_info *info = power_supply_get_drvdata(psy);
596
597 switch (psp) {
598 case POWER_SUPPLY_PROP_STATUS:
599 if (info->state == FSM_FASTCHARGE ||
600 info->state == FSM_PRECHARGE)
601 val->intval = POWER_SUPPLY_STATUS_CHARGING;
602 else
603 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
604 break;
605 case POWER_SUPPLY_PROP_ONLINE:
606 val->intval = info->online;
607 break;
608 default:
609 return -ENODEV;
610 }
611 return 0;
612 }
613
614 static enum power_supply_property pm860x_usb_props[] = {
615 POWER_SUPPLY_PROP_STATUS,
616 POWER_SUPPLY_PROP_ONLINE,
617 };
618
pm860x_init_charger(struct pm860x_charger_info * info)619 static int pm860x_init_charger(struct pm860x_charger_info *info)
620 {
621 int ret;
622
623 ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
624 if (ret < 0)
625 return ret;
626
627 mutex_lock(&info->lock);
628 info->state = FSM_INIT;
629 if (ret & STATUS2_CHG) {
630 info->online = 1;
631 info->allowed = 1;
632 } else {
633 info->online = 0;
634 info->allowed = 0;
635 }
636 mutex_unlock(&info->lock);
637
638 set_charging_fsm(info);
639 return 0;
640 }
641
642 static struct pm860x_irq_desc {
643 const char *name;
644 irqreturn_t (*handler)(int irq, void *data);
645 } pm860x_irq_descs[] = {
646 { "usb supply detect", pm860x_charger_handler },
647 { "charge done", pm860x_done_handler },
648 { "charge timeout", pm860x_exception_handler },
649 { "charge fault", pm860x_exception_handler },
650 { "temperature", pm860x_temp_handler },
651 { "vbatt", pm860x_vbattery_handler },
652 { "vchg", pm860x_vchg_handler },
653 };
654
655 static const struct power_supply_desc pm860x_charger_desc = {
656 .name = "usb",
657 .type = POWER_SUPPLY_TYPE_USB,
658 .properties = pm860x_usb_props,
659 .num_properties = ARRAY_SIZE(pm860x_usb_props),
660 .get_property = pm860x_usb_get_prop,
661 };
662
pm860x_charger_probe(struct platform_device * pdev)663 static int pm860x_charger_probe(struct platform_device *pdev)
664 {
665 struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
666 struct power_supply_config psy_cfg = {};
667 struct pm860x_charger_info *info;
668 int ret;
669 int count;
670 int i;
671 int j;
672
673 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
674 if (!info)
675 return -ENOMEM;
676
677 count = pdev->num_resources;
678 for (i = 0, j = 0; i < count; i++) {
679 info->irq[j] = platform_get_irq(pdev, i);
680 if (info->irq[j] < 0)
681 continue;
682 j++;
683 }
684 info->irq_nums = j;
685
686 info->chip = chip;
687 info->i2c =
688 (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
689 info->i2c_8606 =
690 (chip->id == CHIP_PM8607) ? chip->companion : chip->client;
691 if (!info->i2c_8606) {
692 dev_err(&pdev->dev, "Missed I2C address of 88PM8606!\n");
693 return -EINVAL;
694 }
695 info->dev = &pdev->dev;
696
697 /* set init value for the case we are not using battery */
698 set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_OVP_LOW);
699
700 mutex_init(&info->lock);
701 platform_set_drvdata(pdev, info);
702
703 psy_cfg.drv_data = info;
704 psy_cfg.supplied_to = pm860x_supplied_to;
705 psy_cfg.num_supplicants = ARRAY_SIZE(pm860x_supplied_to);
706 info->usb = devm_power_supply_register(&pdev->dev, &pm860x_charger_desc,
707 &psy_cfg);
708 if (IS_ERR(info->usb)) {
709 return PTR_ERR(info->usb);
710 }
711
712 pm860x_init_charger(info);
713
714 for (i = 0; i < ARRAY_SIZE(info->irq); i++) {
715 ret = devm_request_threaded_irq(&pdev->dev, info->irq[i], NULL,
716 pm860x_irq_descs[i].handler,
717 IRQF_ONESHOT,
718 pm860x_irq_descs[i].name, info);
719 if (ret < 0) {
720 dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
721 info->irq[i], ret);
722 return ret;
723 }
724 }
725 return 0;
726 }
727
728 static struct platform_driver pm860x_charger_driver = {
729 .driver = {
730 .name = "88pm860x-charger",
731 },
732 .probe = pm860x_charger_probe,
733 };
734 module_platform_driver(pm860x_charger_driver);
735
736 MODULE_DESCRIPTION("Marvell 88PM860x Charger driver");
737 MODULE_LICENSE("GPL");
738