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18#include <linux/module.h>
19#include <linux/i2c.h>
20#include <linux/bcd.h>
21#include <linux/regmap.h>
22#include <linux/rtc.h>
23#include <linux/platform_device.h>
24#include <linux/mfd/samsung/core.h>
25#include <linux/mfd/samsung/irq.h>
26#include <linux/mfd/samsung/rtc.h>
27#include <linux/mfd/samsung/s2mps14.h>
28
29
30
31
32
33
34
35
36
37#define UDR_READ_RETRY_CNT 5
38
39
40struct s5m_rtc_reg_config {
41
42 unsigned int regs_count;
43
44 unsigned int time;
45
46 unsigned int ctrl;
47
48 unsigned int alarm0;
49
50 unsigned int alarm1;
51
52 unsigned int smpl_wtsr;
53
54
55
56
57
58 unsigned int rtc_udr_update;
59
60 unsigned int rtc_udr_mask;
61};
62
63
64static const struct s5m_rtc_reg_config s5m_rtc_regs = {
65 .regs_count = 8,
66 .time = S5M_RTC_SEC,
67 .ctrl = S5M_ALARM1_CONF,
68 .alarm0 = S5M_ALARM0_SEC,
69 .alarm1 = S5M_ALARM1_SEC,
70 .smpl_wtsr = S5M_WTSR_SMPL_CNTL,
71 .rtc_udr_update = S5M_RTC_UDR_CON,
72 .rtc_udr_mask = S5M_RTC_UDR_MASK,
73};
74
75
76
77
78
79static const struct s5m_rtc_reg_config s2mps_rtc_regs = {
80 .regs_count = 7,
81 .time = S2MPS_RTC_SEC,
82 .ctrl = S2MPS_RTC_CTRL,
83 .alarm0 = S2MPS_ALARM0_SEC,
84 .alarm1 = S2MPS_ALARM1_SEC,
85 .smpl_wtsr = S2MPS_WTSR_SMPL_CNTL,
86 .rtc_udr_update = S2MPS_RTC_UDR_CON,
87 .rtc_udr_mask = S2MPS_RTC_WUDR_MASK,
88};
89
90struct s5m_rtc_info {
91 struct device *dev;
92 struct i2c_client *i2c;
93 struct sec_pmic_dev *s5m87xx;
94 struct regmap *regmap;
95 struct rtc_device *rtc_dev;
96 int irq;
97 int device_type;
98 int rtc_24hr_mode;
99 bool wtsr_smpl;
100 const struct s5m_rtc_reg_config *regs;
101};
102
103static const struct regmap_config s5m_rtc_regmap_config = {
104 .reg_bits = 8,
105 .val_bits = 8,
106
107 .max_register = S5M_RTC_REG_MAX,
108};
109
110static const struct regmap_config s2mps14_rtc_regmap_config = {
111 .reg_bits = 8,
112 .val_bits = 8,
113
114 .max_register = S2MPS_RTC_REG_MAX,
115};
116
117static void s5m8767_data_to_tm(u8 *data, struct rtc_time *tm,
118 int rtc_24hr_mode)
119{
120 tm->tm_sec = data[RTC_SEC] & 0x7f;
121 tm->tm_min = data[RTC_MIN] & 0x7f;
122 if (rtc_24hr_mode) {
123 tm->tm_hour = data[RTC_HOUR] & 0x1f;
124 } else {
125 tm->tm_hour = data[RTC_HOUR] & 0x0f;
126 if (data[RTC_HOUR] & HOUR_PM_MASK)
127 tm->tm_hour += 12;
128 }
129
130 tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0x7f);
131 tm->tm_mday = data[RTC_DATE] & 0x1f;
132 tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1;
133 tm->tm_year = (data[RTC_YEAR1] & 0x7f) + 100;
134 tm->tm_yday = 0;
135 tm->tm_isdst = 0;
136}
137
138static int s5m8767_tm_to_data(struct rtc_time *tm, u8 *data)
139{
140 data[RTC_SEC] = tm->tm_sec;
141 data[RTC_MIN] = tm->tm_min;
142
143 if (tm->tm_hour >= 12)
144 data[RTC_HOUR] = tm->tm_hour | HOUR_PM_MASK;
145 else
146 data[RTC_HOUR] = tm->tm_hour & ~HOUR_PM_MASK;
147
148 data[RTC_WEEKDAY] = 1 << tm->tm_wday;
149 data[RTC_DATE] = tm->tm_mday;
150 data[RTC_MONTH] = tm->tm_mon + 1;
151 data[RTC_YEAR1] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0;
152
153 if (tm->tm_year < 100) {
154 pr_err("s5m8767 RTC cannot handle the year %d.\n",
155 1900 + tm->tm_year);
156 return -EINVAL;
157 } else {
158 return 0;
159 }
160}
161
162
163
164
165
166static inline int s5m8767_wait_for_udr_update(struct s5m_rtc_info *info)
167{
168 int ret, retry = UDR_READ_RETRY_CNT;
169 unsigned int data;
170
171 do {
172 ret = regmap_read(info->regmap, info->regs->rtc_udr_update,
173 &data);
174 } while (--retry && (data & info->regs->rtc_udr_mask) && !ret);
175
176 if (!retry)
177 dev_err(info->dev, "waiting for UDR update, reached max number of retries\n");
178
179 return ret;
180}
181
182static inline int s5m_check_peding_alarm_interrupt(struct s5m_rtc_info *info,
183 struct rtc_wkalrm *alarm)
184{
185 int ret;
186 unsigned int val;
187
188 switch (info->device_type) {
189 case S5M8767X:
190 case S5M8763X:
191 ret = regmap_read(info->regmap, S5M_RTC_STATUS, &val);
192 val &= S5M_ALARM0_STATUS;
193 break;
194 case S2MPS14X:
195 ret = regmap_read(info->s5m87xx->regmap_pmic, S2MPS14_REG_ST2,
196 &val);
197 val &= S2MPS_ALARM0_STATUS;
198 break;
199 default:
200 return -EINVAL;
201 }
202 if (ret < 0)
203 return ret;
204
205 if (val)
206 alarm->pending = 1;
207 else
208 alarm->pending = 0;
209
210 return 0;
211}
212
213static inline int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info)
214{
215 int ret;
216 unsigned int data;
217
218 ret = regmap_read(info->regmap, info->regs->rtc_udr_update, &data);
219 if (ret < 0) {
220 dev_err(info->dev, "failed to read update reg(%d)\n", ret);
221 return ret;
222 }
223
224 data |= info->regs->rtc_udr_mask;
225 if (info->device_type == S5M8763X || info->device_type == S5M8767X)
226 data |= S5M_RTC_TIME_EN_MASK;
227
228 ret = regmap_write(info->regmap, info->regs->rtc_udr_update, data);
229 if (ret < 0) {
230 dev_err(info->dev, "failed to write update reg(%d)\n", ret);
231 return ret;
232 }
233
234 ret = s5m8767_wait_for_udr_update(info);
235
236 return ret;
237}
238
239static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info)
240{
241 int ret;
242 unsigned int data;
243
244 ret = regmap_read(info->regmap, info->regs->rtc_udr_update, &data);
245 if (ret < 0) {
246 dev_err(info->dev, "%s: fail to read update reg(%d)\n",
247 __func__, ret);
248 return ret;
249 }
250
251 data |= info->regs->rtc_udr_mask;
252 switch (info->device_type) {
253 case S5M8763X:
254 case S5M8767X:
255 data &= ~S5M_RTC_TIME_EN_MASK;
256 break;
257 case S2MPS14X:
258 data |= S2MPS_RTC_RUDR_MASK;
259 break;
260 default:
261 return -EINVAL;
262 }
263
264 ret = regmap_write(info->regmap, info->regs->rtc_udr_update, data);
265 if (ret < 0) {
266 dev_err(info->dev, "%s: fail to write update reg(%d)\n",
267 __func__, ret);
268 return ret;
269 }
270
271 ret = s5m8767_wait_for_udr_update(info);
272
273 return ret;
274}
275
276static void s5m8763_data_to_tm(u8 *data, struct rtc_time *tm)
277{
278 tm->tm_sec = bcd2bin(data[RTC_SEC]);
279 tm->tm_min = bcd2bin(data[RTC_MIN]);
280
281 if (data[RTC_HOUR] & HOUR_12) {
282 tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f);
283 if (data[RTC_HOUR] & HOUR_PM)
284 tm->tm_hour += 12;
285 } else {
286 tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f);
287 }
288
289 tm->tm_wday = data[RTC_WEEKDAY] & 0x07;
290 tm->tm_mday = bcd2bin(data[RTC_DATE]);
291 tm->tm_mon = bcd2bin(data[RTC_MONTH]);
292 tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100;
293 tm->tm_year -= 1900;
294}
295
296static void s5m8763_tm_to_data(struct rtc_time *tm, u8 *data)
297{
298 data[RTC_SEC] = bin2bcd(tm->tm_sec);
299 data[RTC_MIN] = bin2bcd(tm->tm_min);
300 data[RTC_HOUR] = bin2bcd(tm->tm_hour);
301 data[RTC_WEEKDAY] = tm->tm_wday;
302 data[RTC_DATE] = bin2bcd(tm->tm_mday);
303 data[RTC_MONTH] = bin2bcd(tm->tm_mon);
304 data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100);
305 data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100);
306}
307
308static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm)
309{
310 struct s5m_rtc_info *info = dev_get_drvdata(dev);
311 u8 data[info->regs->regs_count];
312 int ret;
313
314 if (info->device_type == S2MPS14X) {
315 ret = regmap_update_bits(info->regmap,
316 info->regs->rtc_udr_update,
317 S2MPS_RTC_RUDR_MASK, S2MPS_RTC_RUDR_MASK);
318 if (ret) {
319 dev_err(dev,
320 "Failed to prepare registers for time reading: %d\n",
321 ret);
322 return ret;
323 }
324 }
325 ret = regmap_bulk_read(info->regmap, info->regs->time, data,
326 info->regs->regs_count);
327 if (ret < 0)
328 return ret;
329
330 switch (info->device_type) {
331 case S5M8763X:
332 s5m8763_data_to_tm(data, tm);
333 break;
334
335 case S5M8767X:
336 case S2MPS14X:
337 s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode);
338 break;
339
340 default:
341 return -EINVAL;
342 }
343
344 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
345 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
346 tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
347
348 return rtc_valid_tm(tm);
349}
350
351static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm)
352{
353 struct s5m_rtc_info *info = dev_get_drvdata(dev);
354 u8 data[info->regs->regs_count];
355 int ret = 0;
356
357 switch (info->device_type) {
358 case S5M8763X:
359 s5m8763_tm_to_data(tm, data);
360 break;
361 case S5M8767X:
362 case S2MPS14X:
363 ret = s5m8767_tm_to_data(tm, data);
364 break;
365 default:
366 return -EINVAL;
367 }
368
369 if (ret < 0)
370 return ret;
371
372 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
373 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
374 tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
375
376 ret = regmap_raw_write(info->regmap, info->regs->time, data,
377 info->regs->regs_count);
378 if (ret < 0)
379 return ret;
380
381 ret = s5m8767_rtc_set_time_reg(info);
382
383 return ret;
384}
385
386static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
387{
388 struct s5m_rtc_info *info = dev_get_drvdata(dev);
389 u8 data[info->regs->regs_count];
390 unsigned int val;
391 int ret, i;
392
393 ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data,
394 info->regs->regs_count);
395 if (ret < 0)
396 return ret;
397
398 switch (info->device_type) {
399 case S5M8763X:
400 s5m8763_data_to_tm(data, &alrm->time);
401 ret = regmap_read(info->regmap, S5M_ALARM0_CONF, &val);
402 if (ret < 0)
403 return ret;
404
405 alrm->enabled = !!val;
406 break;
407
408 case S5M8767X:
409 case S2MPS14X:
410 s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);
411 alrm->enabled = 0;
412 for (i = 0; i < info->regs->regs_count; i++) {
413 if (data[i] & ALARM_ENABLE_MASK) {
414 alrm->enabled = 1;
415 break;
416 }
417 }
418 break;
419
420 default:
421 return -EINVAL;
422 }
423
424 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
425 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
426 alrm->time.tm_mday, alrm->time.tm_hour,
427 alrm->time.tm_min, alrm->time.tm_sec,
428 alrm->time.tm_wday);
429
430 ret = s5m_check_peding_alarm_interrupt(info, alrm);
431
432 return 0;
433}
434
435static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info)
436{
437 u8 data[info->regs->regs_count];
438 int ret, i;
439 struct rtc_time tm;
440
441 ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data,
442 info->regs->regs_count);
443 if (ret < 0)
444 return ret;
445
446 s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
447 dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
448 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
449 tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
450
451 switch (info->device_type) {
452 case S5M8763X:
453 ret = regmap_write(info->regmap, S5M_ALARM0_CONF, 0);
454 break;
455
456 case S5M8767X:
457 case S2MPS14X:
458 for (i = 0; i < info->regs->regs_count; i++)
459 data[i] &= ~ALARM_ENABLE_MASK;
460
461 ret = regmap_raw_write(info->regmap, info->regs->alarm0, data,
462 info->regs->regs_count);
463 if (ret < 0)
464 return ret;
465
466 ret = s5m8767_rtc_set_alarm_reg(info);
467
468 break;
469
470 default:
471 return -EINVAL;
472 }
473
474 return ret;
475}
476
477static int s5m_rtc_start_alarm(struct s5m_rtc_info *info)
478{
479 int ret;
480 u8 data[info->regs->regs_count];
481 u8 alarm0_conf;
482 struct rtc_time tm;
483
484 ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data,
485 info->regs->regs_count);
486 if (ret < 0)
487 return ret;
488
489 s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
490 dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
491 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
492 tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
493
494 switch (info->device_type) {
495 case S5M8763X:
496 alarm0_conf = 0x77;
497 ret = regmap_write(info->regmap, S5M_ALARM0_CONF, alarm0_conf);
498 break;
499
500 case S5M8767X:
501 case S2MPS14X:
502 data[RTC_SEC] |= ALARM_ENABLE_MASK;
503 data[RTC_MIN] |= ALARM_ENABLE_MASK;
504 data[RTC_HOUR] |= ALARM_ENABLE_MASK;
505 data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK;
506 if (data[RTC_DATE] & 0x1f)
507 data[RTC_DATE] |= ALARM_ENABLE_MASK;
508 if (data[RTC_MONTH] & 0xf)
509 data[RTC_MONTH] |= ALARM_ENABLE_MASK;
510 if (data[RTC_YEAR1] & 0x7f)
511 data[RTC_YEAR1] |= ALARM_ENABLE_MASK;
512
513 ret = regmap_raw_write(info->regmap, info->regs->alarm0, data,
514 info->regs->regs_count);
515 if (ret < 0)
516 return ret;
517 ret = s5m8767_rtc_set_alarm_reg(info);
518
519 break;
520
521 default:
522 return -EINVAL;
523 }
524
525 return ret;
526}
527
528static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
529{
530 struct s5m_rtc_info *info = dev_get_drvdata(dev);
531 u8 data[info->regs->regs_count];
532 int ret;
533
534 switch (info->device_type) {
535 case S5M8763X:
536 s5m8763_tm_to_data(&alrm->time, data);
537 break;
538
539 case S5M8767X:
540 case S2MPS14X:
541 s5m8767_tm_to_data(&alrm->time, data);
542 break;
543
544 default:
545 return -EINVAL;
546 }
547
548 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
549 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
550 alrm->time.tm_mday, alrm->time.tm_hour, alrm->time.tm_min,
551 alrm->time.tm_sec, alrm->time.tm_wday);
552
553 ret = s5m_rtc_stop_alarm(info);
554 if (ret < 0)
555 return ret;
556
557 ret = regmap_raw_write(info->regmap, info->regs->alarm0, data,
558 info->regs->regs_count);
559 if (ret < 0)
560 return ret;
561
562 ret = s5m8767_rtc_set_alarm_reg(info);
563 if (ret < 0)
564 return ret;
565
566 if (alrm->enabled)
567 ret = s5m_rtc_start_alarm(info);
568
569 return ret;
570}
571
572static int s5m_rtc_alarm_irq_enable(struct device *dev,
573 unsigned int enabled)
574{
575 struct s5m_rtc_info *info = dev_get_drvdata(dev);
576
577 if (enabled)
578 return s5m_rtc_start_alarm(info);
579 else
580 return s5m_rtc_stop_alarm(info);
581}
582
583static irqreturn_t s5m_rtc_alarm_irq(int irq, void *data)
584{
585 struct s5m_rtc_info *info = data;
586
587 rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
588
589 return IRQ_HANDLED;
590}
591
592static const struct rtc_class_ops s5m_rtc_ops = {
593 .read_time = s5m_rtc_read_time,
594 .set_time = s5m_rtc_set_time,
595 .read_alarm = s5m_rtc_read_alarm,
596 .set_alarm = s5m_rtc_set_alarm,
597 .alarm_irq_enable = s5m_rtc_alarm_irq_enable,
598};
599
600static void s5m_rtc_enable_wtsr(struct s5m_rtc_info *info, bool enable)
601{
602 int ret;
603 ret = regmap_update_bits(info->regmap, info->regs->smpl_wtsr,
604 WTSR_ENABLE_MASK,
605 enable ? WTSR_ENABLE_MASK : 0);
606 if (ret < 0)
607 dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n",
608 __func__, ret);
609}
610
611static void s5m_rtc_enable_smpl(struct s5m_rtc_info *info, bool enable)
612{
613 int ret;
614 ret = regmap_update_bits(info->regmap, info->regs->smpl_wtsr,
615 SMPL_ENABLE_MASK,
616 enable ? SMPL_ENABLE_MASK : 0);
617 if (ret < 0)
618 dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n",
619 __func__, ret);
620}
621
622static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info)
623{
624 u8 data[2];
625 int ret;
626
627 switch (info->device_type) {
628 case S5M8763X:
629 case S5M8767X:
630
631 ret = regmap_update_bits(info->regmap, S5M_RTC_UDR_CON,
632 S5M_RTC_UDR_T_MASK, S5M_RTC_UDR_T_450_US);
633 if (ret < 0)
634 dev_err(info->dev, "%s: fail to change UDR time: %d\n",
635 __func__, ret);
636
637
638 data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
639 data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
640
641 ret = regmap_raw_write(info->regmap, S5M_ALARM0_CONF, data, 2);
642 break;
643
644 case S2MPS14X:
645 data[0] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
646 ret = regmap_write(info->regmap, info->regs->ctrl, data[0]);
647 break;
648
649 default:
650 return -EINVAL;
651 }
652
653 info->rtc_24hr_mode = 1;
654 if (ret < 0) {
655 dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
656 __func__, ret);
657 return ret;
658 }
659
660 return ret;
661}
662
663static int s5m_rtc_probe(struct platform_device *pdev)
664{
665 struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent);
666 struct sec_platform_data *pdata = s5m87xx->pdata;
667 struct s5m_rtc_info *info;
668 const struct regmap_config *regmap_cfg;
669 int ret, alarm_irq;
670
671 if (!pdata) {
672 dev_err(pdev->dev.parent, "Platform data not supplied\n");
673 return -ENODEV;
674 }
675
676 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
677 if (!info)
678 return -ENOMEM;
679
680 switch (pdata->device_type) {
681 case S2MPS14X:
682 regmap_cfg = &s2mps14_rtc_regmap_config;
683 info->regs = &s2mps_rtc_regs;
684 alarm_irq = S2MPS14_IRQ_RTCA0;
685 break;
686 case S5M8763X:
687 regmap_cfg = &s5m_rtc_regmap_config;
688 info->regs = &s5m_rtc_regs;
689 alarm_irq = S5M8763_IRQ_ALARM0;
690 break;
691 case S5M8767X:
692 regmap_cfg = &s5m_rtc_regmap_config;
693 info->regs = &s5m_rtc_regs;
694 alarm_irq = S5M8767_IRQ_RTCA1;
695 break;
696 default:
697 dev_err(&pdev->dev, "Device type is not supported by RTC driver\n");
698 return -ENODEV;
699 }
700
701 info->i2c = i2c_new_dummy(s5m87xx->i2c->adapter, RTC_I2C_ADDR);
702 if (!info->i2c) {
703 dev_err(&pdev->dev, "Failed to allocate I2C for RTC\n");
704 return -ENODEV;
705 }
706
707 info->regmap = devm_regmap_init_i2c(info->i2c, regmap_cfg);
708 if (IS_ERR(info->regmap)) {
709 ret = PTR_ERR(info->regmap);
710 dev_err(&pdev->dev, "Failed to allocate RTC register map: %d\n",
711 ret);
712 goto err;
713 }
714
715 info->dev = &pdev->dev;
716 info->s5m87xx = s5m87xx;
717 info->device_type = s5m87xx->device_type;
718 info->wtsr_smpl = s5m87xx->wtsr_smpl;
719
720 if (s5m87xx->irq_data) {
721 info->irq = regmap_irq_get_virq(s5m87xx->irq_data, alarm_irq);
722 if (info->irq <= 0) {
723 ret = -EINVAL;
724 dev_err(&pdev->dev, "Failed to get virtual IRQ %d\n",
725 alarm_irq);
726 goto err;
727 }
728 }
729
730 platform_set_drvdata(pdev, info);
731
732 ret = s5m8767_rtc_init_reg(info);
733
734 if (info->wtsr_smpl) {
735 s5m_rtc_enable_wtsr(info, true);
736 s5m_rtc_enable_smpl(info, true);
737 }
738
739 device_init_wakeup(&pdev->dev, 1);
740
741 info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc",
742 &s5m_rtc_ops, THIS_MODULE);
743
744 if (IS_ERR(info->rtc_dev)) {
745 ret = PTR_ERR(info->rtc_dev);
746 goto err;
747 }
748
749 if (!info->irq) {
750 dev_info(&pdev->dev, "Alarm IRQ not available\n");
751 return 0;
752 }
753
754 ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
755 s5m_rtc_alarm_irq, 0, "rtc-alarm0",
756 info);
757 if (ret < 0) {
758 dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
759 info->irq, ret);
760 goto err;
761 }
762
763 return 0;
764
765err:
766 i2c_unregister_device(info->i2c);
767
768 return ret;
769}
770
771static void s5m_rtc_shutdown(struct platform_device *pdev)
772{
773 struct s5m_rtc_info *info = platform_get_drvdata(pdev);
774 int i;
775 unsigned int val = 0;
776 if (info->wtsr_smpl) {
777 for (i = 0; i < 3; i++) {
778 s5m_rtc_enable_wtsr(info, false);
779 regmap_read(info->regmap, info->regs->smpl_wtsr, &val);
780 pr_debug("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val);
781 if (val & WTSR_ENABLE_MASK)
782 pr_emerg("%s: fail to disable WTSR\n",
783 __func__);
784 else {
785 pr_info("%s: success to disable WTSR\n",
786 __func__);
787 break;
788 }
789 }
790 }
791
792 s5m_rtc_enable_smpl(info, false);
793}
794
795static int s5m_rtc_remove(struct platform_device *pdev)
796{
797 struct s5m_rtc_info *info = platform_get_drvdata(pdev);
798
799
800 s5m_rtc_shutdown(pdev);
801 i2c_unregister_device(info->i2c);
802
803 return 0;
804}
805
806#ifdef CONFIG_PM_SLEEP
807static int s5m_rtc_resume(struct device *dev)
808{
809 struct s5m_rtc_info *info = dev_get_drvdata(dev);
810 int ret = 0;
811
812 if (info->irq && device_may_wakeup(dev))
813 ret = disable_irq_wake(info->irq);
814
815 return ret;
816}
817
818static int s5m_rtc_suspend(struct device *dev)
819{
820 struct s5m_rtc_info *info = dev_get_drvdata(dev);
821 int ret = 0;
822
823 if (info->irq && device_may_wakeup(dev))
824 ret = enable_irq_wake(info->irq);
825
826 return ret;
827}
828#endif
829
830static SIMPLE_DEV_PM_OPS(s5m_rtc_pm_ops, s5m_rtc_suspend, s5m_rtc_resume);
831
832static const struct platform_device_id s5m_rtc_id[] = {
833 { "s5m-rtc", S5M8767X },
834 { "s2mps14-rtc", S2MPS14X },
835 { },
836};
837
838static struct platform_driver s5m_rtc_driver = {
839 .driver = {
840 .name = "s5m-rtc",
841 .pm = &s5m_rtc_pm_ops,
842 },
843 .probe = s5m_rtc_probe,
844 .remove = s5m_rtc_remove,
845 .shutdown = s5m_rtc_shutdown,
846 .id_table = s5m_rtc_id,
847};
848
849module_platform_driver(s5m_rtc_driver);
850
851
852MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
853MODULE_DESCRIPTION("Samsung S5M/S2MPS14 RTC driver");
854MODULE_LICENSE("GPL");
855MODULE_ALIAS("platform:s5m-rtc");
856
