1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19
20#include <linux/module.h>
21#include <linux/i2c.h>
22#include <linux/bcd.h>
23#include <linux/regmap.h>
24#include <linux/rtc.h>
25#include <linux/platform_device.h>
26#include <linux/mfd/samsung/core.h>
27#include <linux/mfd/samsung/irq.h>
28#include <linux/mfd/samsung/rtc.h>
29#include <linux/mfd/samsung/s2mps14.h>
30
31
32
33
34
35
36
37
38
39#define UDR_READ_RETRY_CNT 5
40
41enum {
42 RTC_SEC = 0,
43 RTC_MIN,
44 RTC_HOUR,
45 RTC_WEEKDAY,
46 RTC_DATE,
47 RTC_MONTH,
48 RTC_YEAR1,
49 RTC_YEAR2,
50
51 RTC_MAX_NUM_TIME_REGS
52};
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70struct s5m_rtc_reg_config {
71
72 unsigned int regs_count;
73
74 unsigned int time;
75
76 unsigned int ctrl;
77
78 unsigned int alarm0;
79
80 unsigned int alarm1;
81
82
83
84
85
86 unsigned int udr_update;
87
88 unsigned int autoclear_udr_mask;
89
90
91
92
93 unsigned int read_time_udr_mask;
94 unsigned int write_time_udr_mask;
95 unsigned int write_alarm_udr_mask;
96};
97
98
99static const struct s5m_rtc_reg_config s5m_rtc_regs = {
100 .regs_count = 8,
101 .time = S5M_RTC_SEC,
102 .ctrl = S5M_ALARM1_CONF,
103 .alarm0 = S5M_ALARM0_SEC,
104 .alarm1 = S5M_ALARM1_SEC,
105 .udr_update = S5M_RTC_UDR_CON,
106 .autoclear_udr_mask = S5M_RTC_UDR_MASK,
107 .read_time_udr_mask = 0,
108 .write_time_udr_mask = S5M_RTC_UDR_MASK | S5M_RTC_TIME_EN_MASK,
109 .write_alarm_udr_mask = S5M_RTC_UDR_MASK,
110};
111
112
113static const struct s5m_rtc_reg_config s2mps13_rtc_regs = {
114 .regs_count = 7,
115 .time = S2MPS_RTC_SEC,
116 .ctrl = S2MPS_RTC_CTRL,
117 .alarm0 = S2MPS_ALARM0_SEC,
118 .alarm1 = S2MPS_ALARM1_SEC,
119 .udr_update = S2MPS_RTC_UDR_CON,
120 .autoclear_udr_mask = S2MPS_RTC_WUDR_MASK,
121 .read_time_udr_mask = S2MPS_RTC_RUDR_MASK,
122 .write_time_udr_mask = S2MPS_RTC_WUDR_MASK,
123 .write_alarm_udr_mask = S2MPS_RTC_WUDR_MASK | S2MPS13_RTC_AUDR_MASK,
124};
125
126
127static const struct s5m_rtc_reg_config s2mps14_rtc_regs = {
128 .regs_count = 7,
129 .time = S2MPS_RTC_SEC,
130 .ctrl = S2MPS_RTC_CTRL,
131 .alarm0 = S2MPS_ALARM0_SEC,
132 .alarm1 = S2MPS_ALARM1_SEC,
133 .udr_update = S2MPS_RTC_UDR_CON,
134 .autoclear_udr_mask = S2MPS_RTC_WUDR_MASK,
135 .read_time_udr_mask = S2MPS_RTC_RUDR_MASK,
136 .write_time_udr_mask = S2MPS_RTC_WUDR_MASK,
137 .write_alarm_udr_mask = S2MPS_RTC_WUDR_MASK | S2MPS_RTC_RUDR_MASK,
138};
139
140
141
142
143
144static const struct s5m_rtc_reg_config s2mps15_rtc_regs = {
145 .regs_count = 7,
146 .time = S2MPS_RTC_SEC,
147 .ctrl = S2MPS_RTC_CTRL,
148 .alarm0 = S2MPS_ALARM0_SEC,
149 .alarm1 = S2MPS_ALARM1_SEC,
150 .udr_update = S2MPS_RTC_UDR_CON,
151 .autoclear_udr_mask = S2MPS_RTC_WUDR_MASK,
152 .read_time_udr_mask = S2MPS_RTC_RUDR_MASK,
153 .write_time_udr_mask = S2MPS15_RTC_WUDR_MASK,
154 .write_alarm_udr_mask = S2MPS15_RTC_AUDR_MASK,
155};
156
157struct s5m_rtc_info {
158 struct device *dev;
159 struct i2c_client *i2c;
160 struct sec_pmic_dev *s5m87xx;
161 struct regmap *regmap;
162 struct rtc_device *rtc_dev;
163 int irq;
164 enum sec_device_type device_type;
165 int rtc_24hr_mode;
166 const struct s5m_rtc_reg_config *regs;
167};
168
169static const struct regmap_config s5m_rtc_regmap_config = {
170 .reg_bits = 8,
171 .val_bits = 8,
172
173 .max_register = S5M_RTC_REG_MAX,
174};
175
176static const struct regmap_config s2mps14_rtc_regmap_config = {
177 .reg_bits = 8,
178 .val_bits = 8,
179
180 .max_register = S2MPS_RTC_REG_MAX,
181};
182
183static void s5m8767_data_to_tm(u8 *data, struct rtc_time *tm,
184 int rtc_24hr_mode)
185{
186 tm->tm_sec = data[RTC_SEC] & 0x7f;
187 tm->tm_min = data[RTC_MIN] & 0x7f;
188 if (rtc_24hr_mode) {
189 tm->tm_hour = data[RTC_HOUR] & 0x1f;
190 } else {
191 tm->tm_hour = data[RTC_HOUR] & 0x0f;
192 if (data[RTC_HOUR] & HOUR_PM_MASK)
193 tm->tm_hour += 12;
194 }
195
196 tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0x7f);
197 tm->tm_mday = data[RTC_DATE] & 0x1f;
198 tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1;
199 tm->tm_year = (data[RTC_YEAR1] & 0x7f) + 100;
200 tm->tm_yday = 0;
201 tm->tm_isdst = 0;
202}
203
204static int s5m8767_tm_to_data(struct rtc_time *tm, u8 *data)
205{
206 data[RTC_SEC] = tm->tm_sec;
207 data[RTC_MIN] = tm->tm_min;
208
209 if (tm->tm_hour >= 12)
210 data[RTC_HOUR] = tm->tm_hour | HOUR_PM_MASK;
211 else
212 data[RTC_HOUR] = tm->tm_hour & ~HOUR_PM_MASK;
213
214 data[RTC_WEEKDAY] = 1 << tm->tm_wday;
215 data[RTC_DATE] = tm->tm_mday;
216 data[RTC_MONTH] = tm->tm_mon + 1;
217 data[RTC_YEAR1] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0;
218
219 if (tm->tm_year < 100) {
220 pr_err("RTC cannot handle the year %d\n",
221 1900 + tm->tm_year);
222 return -EINVAL;
223 } else {
224 return 0;
225 }
226}
227
228
229
230
231
232static int s5m8767_wait_for_udr_update(struct s5m_rtc_info *info)
233{
234 int ret, retry = UDR_READ_RETRY_CNT;
235 unsigned int data;
236
237 do {
238 ret = regmap_read(info->regmap, info->regs->udr_update, &data);
239 } while (--retry && (data & info->regs->autoclear_udr_mask) && !ret);
240
241 if (!retry)
242 dev_err(info->dev, "waiting for UDR update, reached max number of retries\n");
243
244 return ret;
245}
246
247static int s5m_check_peding_alarm_interrupt(struct s5m_rtc_info *info,
248 struct rtc_wkalrm *alarm)
249{
250 int ret;
251 unsigned int val;
252
253 switch (info->device_type) {
254 case S5M8767X:
255 case S5M8763X:
256 ret = regmap_read(info->regmap, S5M_RTC_STATUS, &val);
257 val &= S5M_ALARM0_STATUS;
258 break;
259 case S2MPS15X:
260 case S2MPS14X:
261 case S2MPS13X:
262 ret = regmap_read(info->s5m87xx->regmap_pmic, S2MPS14_REG_ST2,
263 &val);
264 val &= S2MPS_ALARM0_STATUS;
265 break;
266 default:
267 return -EINVAL;
268 }
269 if (ret < 0)
270 return ret;
271
272 if (val)
273 alarm->pending = 1;
274 else
275 alarm->pending = 0;
276
277 return 0;
278}
279
280static int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info)
281{
282 int ret;
283 unsigned int data;
284
285 ret = regmap_read(info->regmap, info->regs->udr_update, &data);
286 if (ret < 0) {
287 dev_err(info->dev, "failed to read update reg(%d)\n", ret);
288 return ret;
289 }
290
291 data |= info->regs->write_time_udr_mask;
292
293 ret = regmap_write(info->regmap, info->regs->udr_update, data);
294 if (ret < 0) {
295 dev_err(info->dev, "failed to write update reg(%d)\n", ret);
296 return ret;
297 }
298
299 ret = s5m8767_wait_for_udr_update(info);
300
301 return ret;
302}
303
304static int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info)
305{
306 int ret;
307 unsigned int data;
308
309 ret = regmap_read(info->regmap, info->regs->udr_update, &data);
310 if (ret < 0) {
311 dev_err(info->dev, "%s: fail to read update reg(%d)\n",
312 __func__, ret);
313 return ret;
314 }
315
316 data |= info->regs->write_alarm_udr_mask;
317 switch (info->device_type) {
318 case S5M8763X:
319 case S5M8767X:
320 data &= ~S5M_RTC_TIME_EN_MASK;
321 break;
322 case S2MPS15X:
323 case S2MPS14X:
324 case S2MPS13X:
325
326 break;
327 default:
328 return -EINVAL;
329 }
330
331 ret = regmap_write(info->regmap, info->regs->udr_update, data);
332 if (ret < 0) {
333 dev_err(info->dev, "%s: fail to write update reg(%d)\n",
334 __func__, ret);
335 return ret;
336 }
337
338 ret = s5m8767_wait_for_udr_update(info);
339
340
341 if (info->device_type == S2MPS13X)
342 regmap_update_bits(info->regmap, info->regs->udr_update,
343 S2MPS13_RTC_AUDR_MASK, 0);
344
345 return ret;
346}
347
348static void s5m8763_data_to_tm(u8 *data, struct rtc_time *tm)
349{
350 tm->tm_sec = bcd2bin(data[RTC_SEC]);
351 tm->tm_min = bcd2bin(data[RTC_MIN]);
352
353 if (data[RTC_HOUR] & HOUR_12) {
354 tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f);
355 if (data[RTC_HOUR] & HOUR_PM)
356 tm->tm_hour += 12;
357 } else {
358 tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f);
359 }
360
361 tm->tm_wday = data[RTC_WEEKDAY] & 0x07;
362 tm->tm_mday = bcd2bin(data[RTC_DATE]);
363 tm->tm_mon = bcd2bin(data[RTC_MONTH]);
364 tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100;
365 tm->tm_year -= 1900;
366}
367
368static void s5m8763_tm_to_data(struct rtc_time *tm, u8 *data)
369{
370 data[RTC_SEC] = bin2bcd(tm->tm_sec);
371 data[RTC_MIN] = bin2bcd(tm->tm_min);
372 data[RTC_HOUR] = bin2bcd(tm->tm_hour);
373 data[RTC_WEEKDAY] = tm->tm_wday;
374 data[RTC_DATE] = bin2bcd(tm->tm_mday);
375 data[RTC_MONTH] = bin2bcd(tm->tm_mon);
376 data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100);
377 data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100);
378}
379
380static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm)
381{
382 struct s5m_rtc_info *info = dev_get_drvdata(dev);
383 u8 data[RTC_MAX_NUM_TIME_REGS];
384 int ret;
385
386 if (info->regs->read_time_udr_mask) {
387 ret = regmap_update_bits(info->regmap,
388 info->regs->udr_update,
389 info->regs->read_time_udr_mask,
390 info->regs->read_time_udr_mask);
391 if (ret) {
392 dev_err(dev,
393 "Failed to prepare registers for time reading: %d\n",
394 ret);
395 return ret;
396 }
397 }
398 ret = regmap_bulk_read(info->regmap, info->regs->time, data,
399 info->regs->regs_count);
400 if (ret < 0)
401 return ret;
402
403 switch (info->device_type) {
404 case S5M8763X:
405 s5m8763_data_to_tm(data, tm);
406 break;
407
408 case S5M8767X:
409 case S2MPS15X:
410 case S2MPS14X:
411 case S2MPS13X:
412 s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode);
413 break;
414
415 default:
416 return -EINVAL;
417 }
418
419 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
420 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
421 tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
422
423 return 0;
424}
425
426static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm)
427{
428 struct s5m_rtc_info *info = dev_get_drvdata(dev);
429 u8 data[RTC_MAX_NUM_TIME_REGS];
430 int ret = 0;
431
432 switch (info->device_type) {
433 case S5M8763X:
434 s5m8763_tm_to_data(tm, data);
435 break;
436 case S5M8767X:
437 case S2MPS15X:
438 case S2MPS14X:
439 case S2MPS13X:
440 ret = s5m8767_tm_to_data(tm, data);
441 break;
442 default:
443 return -EINVAL;
444 }
445
446 if (ret < 0)
447 return ret;
448
449 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
450 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
451 tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
452
453 ret = regmap_raw_write(info->regmap, info->regs->time, data,
454 info->regs->regs_count);
455 if (ret < 0)
456 return ret;
457
458 ret = s5m8767_rtc_set_time_reg(info);
459
460 return ret;
461}
462
463static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
464{
465 struct s5m_rtc_info *info = dev_get_drvdata(dev);
466 u8 data[RTC_MAX_NUM_TIME_REGS];
467 unsigned int val;
468 int ret, i;
469
470 ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data,
471 info->regs->regs_count);
472 if (ret < 0)
473 return ret;
474
475 switch (info->device_type) {
476 case S5M8763X:
477 s5m8763_data_to_tm(data, &alrm->time);
478 ret = regmap_read(info->regmap, S5M_ALARM0_CONF, &val);
479 if (ret < 0)
480 return ret;
481
482 alrm->enabled = !!val;
483 break;
484
485 case S5M8767X:
486 case S2MPS15X:
487 case S2MPS14X:
488 case S2MPS13X:
489 s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);
490 alrm->enabled = 0;
491 for (i = 0; i < info->regs->regs_count; i++) {
492 if (data[i] & ALARM_ENABLE_MASK) {
493 alrm->enabled = 1;
494 break;
495 }
496 }
497 break;
498
499 default:
500 return -EINVAL;
501 }
502
503 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
504 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
505 alrm->time.tm_mday, alrm->time.tm_hour,
506 alrm->time.tm_min, alrm->time.tm_sec,
507 alrm->time.tm_wday);
508
509 ret = s5m_check_peding_alarm_interrupt(info, alrm);
510
511 return 0;
512}
513
514static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info)
515{
516 u8 data[RTC_MAX_NUM_TIME_REGS];
517 int ret, i;
518 struct rtc_time tm;
519
520 ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data,
521 info->regs->regs_count);
522 if (ret < 0)
523 return ret;
524
525 s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
526 dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
527 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
528 tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
529
530 switch (info->device_type) {
531 case S5M8763X:
532 ret = regmap_write(info->regmap, S5M_ALARM0_CONF, 0);
533 break;
534
535 case S5M8767X:
536 case S2MPS15X:
537 case S2MPS14X:
538 case S2MPS13X:
539 for (i = 0; i < info->regs->regs_count; i++)
540 data[i] &= ~ALARM_ENABLE_MASK;
541
542 ret = regmap_raw_write(info->regmap, info->regs->alarm0, data,
543 info->regs->regs_count);
544 if (ret < 0)
545 return ret;
546
547 ret = s5m8767_rtc_set_alarm_reg(info);
548
549 break;
550
551 default:
552 return -EINVAL;
553 }
554
555 return ret;
556}
557
558static int s5m_rtc_start_alarm(struct s5m_rtc_info *info)
559{
560 int ret;
561 u8 data[RTC_MAX_NUM_TIME_REGS];
562 u8 alarm0_conf;
563 struct rtc_time tm;
564
565 ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data,
566 info->regs->regs_count);
567 if (ret < 0)
568 return ret;
569
570 s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
571 dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
572 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
573 tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
574
575 switch (info->device_type) {
576 case S5M8763X:
577 alarm0_conf = 0x77;
578 ret = regmap_write(info->regmap, S5M_ALARM0_CONF, alarm0_conf);
579 break;
580
581 case S5M8767X:
582 case S2MPS15X:
583 case S2MPS14X:
584 case S2MPS13X:
585 data[RTC_SEC] |= ALARM_ENABLE_MASK;
586 data[RTC_MIN] |= ALARM_ENABLE_MASK;
587 data[RTC_HOUR] |= ALARM_ENABLE_MASK;
588 data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK;
589 if (data[RTC_DATE] & 0x1f)
590 data[RTC_DATE] |= ALARM_ENABLE_MASK;
591 if (data[RTC_MONTH] & 0xf)
592 data[RTC_MONTH] |= ALARM_ENABLE_MASK;
593 if (data[RTC_YEAR1] & 0x7f)
594 data[RTC_YEAR1] |= ALARM_ENABLE_MASK;
595
596 ret = regmap_raw_write(info->regmap, info->regs->alarm0, data,
597 info->regs->regs_count);
598 if (ret < 0)
599 return ret;
600 ret = s5m8767_rtc_set_alarm_reg(info);
601
602 break;
603
604 default:
605 return -EINVAL;
606 }
607
608 return ret;
609}
610
611static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
612{
613 struct s5m_rtc_info *info = dev_get_drvdata(dev);
614 u8 data[RTC_MAX_NUM_TIME_REGS];
615 int ret;
616
617 switch (info->device_type) {
618 case S5M8763X:
619 s5m8763_tm_to_data(&alrm->time, data);
620 break;
621
622 case S5M8767X:
623 case S2MPS15X:
624 case S2MPS14X:
625 case S2MPS13X:
626 s5m8767_tm_to_data(&alrm->time, data);
627 break;
628
629 default:
630 return -EINVAL;
631 }
632
633 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
634 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
635 alrm->time.tm_mday, alrm->time.tm_hour, alrm->time.tm_min,
636 alrm->time.tm_sec, alrm->time.tm_wday);
637
638 ret = s5m_rtc_stop_alarm(info);
639 if (ret < 0)
640 return ret;
641
642 ret = regmap_raw_write(info->regmap, info->regs->alarm0, data,
643 info->regs->regs_count);
644 if (ret < 0)
645 return ret;
646
647 ret = s5m8767_rtc_set_alarm_reg(info);
648 if (ret < 0)
649 return ret;
650
651 if (alrm->enabled)
652 ret = s5m_rtc_start_alarm(info);
653
654 return ret;
655}
656
657static int s5m_rtc_alarm_irq_enable(struct device *dev,
658 unsigned int enabled)
659{
660 struct s5m_rtc_info *info = dev_get_drvdata(dev);
661
662 if (enabled)
663 return s5m_rtc_start_alarm(info);
664 else
665 return s5m_rtc_stop_alarm(info);
666}
667
668static irqreturn_t s5m_rtc_alarm_irq(int irq, void *data)
669{
670 struct s5m_rtc_info *info = data;
671
672 rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
673
674 return IRQ_HANDLED;
675}
676
677static const struct rtc_class_ops s5m_rtc_ops = {
678 .read_time = s5m_rtc_read_time,
679 .set_time = s5m_rtc_set_time,
680 .read_alarm = s5m_rtc_read_alarm,
681 .set_alarm = s5m_rtc_set_alarm,
682 .alarm_irq_enable = s5m_rtc_alarm_irq_enable,
683};
684
685static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info)
686{
687 u8 data[2];
688 int ret;
689
690 switch (info->device_type) {
691 case S5M8763X:
692 case S5M8767X:
693
694 ret = regmap_update_bits(info->regmap, S5M_RTC_UDR_CON,
695 S5M_RTC_UDR_T_MASK, S5M_RTC_UDR_T_450_US);
696 if (ret < 0)
697 dev_err(info->dev, "%s: fail to change UDR time: %d\n",
698 __func__, ret);
699
700
701 data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
702 data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
703
704 ret = regmap_raw_write(info->regmap, S5M_ALARM0_CONF, data, 2);
705 break;
706
707 case S2MPS15X:
708 case S2MPS14X:
709 case S2MPS13X:
710 data[0] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
711 ret = regmap_write(info->regmap, info->regs->ctrl, data[0]);
712 if (ret < 0)
713 break;
714
715
716
717
718
719
720
721 ret = s5m8767_rtc_set_alarm_reg(info);
722 break;
723
724 default:
725 return -EINVAL;
726 }
727
728 info->rtc_24hr_mode = 1;
729 if (ret < 0) {
730 dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
731 __func__, ret);
732 return ret;
733 }
734
735 return ret;
736}
737
738static int s5m_rtc_probe(struct platform_device *pdev)
739{
740 struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent);
741 struct sec_platform_data *pdata = s5m87xx->pdata;
742 struct s5m_rtc_info *info;
743 const struct regmap_config *regmap_cfg;
744 int ret, alarm_irq;
745
746 if (!pdata) {
747 dev_err(pdev->dev.parent, "Platform data not supplied\n");
748 return -ENODEV;
749 }
750
751 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
752 if (!info)
753 return -ENOMEM;
754
755 switch (platform_get_device_id(pdev)->driver_data) {
756 case S2MPS15X:
757 regmap_cfg = &s2mps14_rtc_regmap_config;
758 info->regs = &s2mps15_rtc_regs;
759 alarm_irq = S2MPS14_IRQ_RTCA0;
760 break;
761 case S2MPS14X:
762 regmap_cfg = &s2mps14_rtc_regmap_config;
763 info->regs = &s2mps14_rtc_regs;
764 alarm_irq = S2MPS14_IRQ_RTCA0;
765 break;
766 case S2MPS13X:
767 regmap_cfg = &s2mps14_rtc_regmap_config;
768 info->regs = &s2mps13_rtc_regs;
769 alarm_irq = S2MPS14_IRQ_RTCA0;
770 break;
771 case S5M8763X:
772 regmap_cfg = &s5m_rtc_regmap_config;
773 info->regs = &s5m_rtc_regs;
774 alarm_irq = S5M8763_IRQ_ALARM0;
775 break;
776 case S5M8767X:
777 regmap_cfg = &s5m_rtc_regmap_config;
778 info->regs = &s5m_rtc_regs;
779 alarm_irq = S5M8767_IRQ_RTCA1;
780 break;
781 default:
782 dev_err(&pdev->dev,
783 "Device type %lu is not supported by RTC driver\n",
784 platform_get_device_id(pdev)->driver_data);
785 return -ENODEV;
786 }
787
788 info->i2c = i2c_new_dummy(s5m87xx->i2c->adapter, RTC_I2C_ADDR);
789 if (!info->i2c) {
790 dev_err(&pdev->dev, "Failed to allocate I2C for RTC\n");
791 return -ENODEV;
792 }
793
794 info->regmap = devm_regmap_init_i2c(info->i2c, regmap_cfg);
795 if (IS_ERR(info->regmap)) {
796 ret = PTR_ERR(info->regmap);
797 dev_err(&pdev->dev, "Failed to allocate RTC register map: %d\n",
798 ret);
799 goto err;
800 }
801
802 info->dev = &pdev->dev;
803 info->s5m87xx = s5m87xx;
804 info->device_type = platform_get_device_id(pdev)->driver_data;
805
806 if (s5m87xx->irq_data) {
807 info->irq = regmap_irq_get_virq(s5m87xx->irq_data, alarm_irq);
808 if (info->irq <= 0) {
809 ret = -EINVAL;
810 dev_err(&pdev->dev, "Failed to get virtual IRQ %d\n",
811 alarm_irq);
812 goto err;
813 }
814 }
815
816 platform_set_drvdata(pdev, info);
817
818 ret = s5m8767_rtc_init_reg(info);
819
820 device_init_wakeup(&pdev->dev, 1);
821
822 info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc",
823 &s5m_rtc_ops, THIS_MODULE);
824
825 if (IS_ERR(info->rtc_dev)) {
826 ret = PTR_ERR(info->rtc_dev);
827 goto err;
828 }
829
830 if (!info->irq) {
831 dev_info(&pdev->dev, "Alarm IRQ not available\n");
832 return 0;
833 }
834
835 ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
836 s5m_rtc_alarm_irq, 0, "rtc-alarm0",
837 info);
838 if (ret < 0) {
839 dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
840 info->irq, ret);
841 goto err;
842 }
843
844 return 0;
845
846err:
847 i2c_unregister_device(info->i2c);
848
849 return ret;
850}
851
852static int s5m_rtc_remove(struct platform_device *pdev)
853{
854 struct s5m_rtc_info *info = platform_get_drvdata(pdev);
855
856 i2c_unregister_device(info->i2c);
857
858 return 0;
859}
860
861#ifdef CONFIG_PM_SLEEP
862static int s5m_rtc_resume(struct device *dev)
863{
864 struct s5m_rtc_info *info = dev_get_drvdata(dev);
865 int ret = 0;
866
867 if (info->irq && device_may_wakeup(dev))
868 ret = disable_irq_wake(info->irq);
869
870 return ret;
871}
872
873static int s5m_rtc_suspend(struct device *dev)
874{
875 struct s5m_rtc_info *info = dev_get_drvdata(dev);
876 int ret = 0;
877
878 if (info->irq && device_may_wakeup(dev))
879 ret = enable_irq_wake(info->irq);
880
881 return ret;
882}
883#endif
884
885static SIMPLE_DEV_PM_OPS(s5m_rtc_pm_ops, s5m_rtc_suspend, s5m_rtc_resume);
886
887static const struct platform_device_id s5m_rtc_id[] = {
888 { "s5m-rtc", S5M8767X },
889 { "s2mps13-rtc", S2MPS13X },
890 { "s2mps14-rtc", S2MPS14X },
891 { "s2mps15-rtc", S2MPS15X },
892 { },
893};
894MODULE_DEVICE_TABLE(platform, s5m_rtc_id);
895
896static struct platform_driver s5m_rtc_driver = {
897 .driver = {
898 .name = "s5m-rtc",
899 .pm = &s5m_rtc_pm_ops,
900 },
901 .probe = s5m_rtc_probe,
902 .remove = s5m_rtc_remove,
903 .id_table = s5m_rtc_id,
904};
905
906module_platform_driver(s5m_rtc_driver);
907
908
909MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
910MODULE_DESCRIPTION("Samsung S5M/S2MPS14 RTC driver");
911MODULE_LICENSE("GPL");
912MODULE_ALIAS("platform:s5m-rtc");
913
