1 /* drivers/rtc/rtc-s3c.c
3 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com/
6 * Copyright (c) 2004,2006 Simtec Electronics
7 * Ben Dooks, <ben@simtec.co.uk>
8 * http://armlinux.simtec.co.uk/
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * S3C2410/S3C2440/S3C24XX Internal RTC Driver
17 #include <linux/module.h>
19 #include <linux/string.h>
20 #include <linux/init.h>
21 #include <linux/platform_device.h>
22 #include <linux/interrupt.h>
23 #include <linux/rtc.h>
24 #include <linux/bcd.h>
25 #include <linux/clk.h>
26 #include <linux/log2.h>
27 #include <linux/slab.h>
29 #include <linux/uaccess.h>
37 struct rtc_device *rtc;
41 struct clk *rtc_src_clk;
44 struct s3c_rtc_data *data;
50 spinlock_t alarm_clk_lock;
52 int ticnt_save, ticnt_en_save;
60 void (*irq_handler) (struct s3c_rtc *info, int mask);
61 void (*set_freq) (struct s3c_rtc *info, int freq);
62 void (*enable_tick) (struct s3c_rtc *info, struct seq_file *seq);
63 void (*select_tick_clk) (struct s3c_rtc *info);
64 void (*save_tick_cnt) (struct s3c_rtc *info);
65 void (*restore_tick_cnt) (struct s3c_rtc *info);
66 void (*enable) (struct s3c_rtc *info);
67 void (*disable) (struct s3c_rtc *info);
70 static void s3c_rtc_enable_clk(struct s3c_rtc *info)
72 unsigned long irq_flags;
74 spin_lock_irqsave(&info->alarm_clk_lock, irq_flags);
75 if (info->clk_disabled) {
76 clk_enable(info->rtc_clk);
77 if (info->data->needs_src_clk)
78 clk_enable(info->rtc_src_clk);
79 info->clk_disabled = false;
81 spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags);
84 static void s3c_rtc_disable_clk(struct s3c_rtc *info)
86 unsigned long irq_flags;
88 spin_lock_irqsave(&info->alarm_clk_lock, irq_flags);
89 if (!info->clk_disabled) {
90 if (info->data->needs_src_clk)
91 clk_disable(info->rtc_src_clk);
92 clk_disable(info->rtc_clk);
93 info->clk_disabled = true;
95 spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags);
99 static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
101 struct s3c_rtc *info = (struct s3c_rtc *)id;
103 if (info->data->irq_handler)
104 info->data->irq_handler(info, S3C2410_INTP_TIC);
109 static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
111 struct s3c_rtc *info = (struct s3c_rtc *)id;
113 if (info->data->irq_handler)
114 info->data->irq_handler(info, S3C2410_INTP_ALM);
119 /* Update control registers */
120 static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
122 struct s3c_rtc *info = dev_get_drvdata(dev);
125 dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled);
127 s3c_rtc_enable_clk(info);
129 tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
132 tmp |= S3C2410_RTCALM_ALMEN;
134 writeb(tmp, info->base + S3C2410_RTCALM);
136 s3c_rtc_disable_clk(info);
139 s3c_rtc_enable_clk(info);
141 s3c_rtc_disable_clk(info);
146 /* Set RTC frequency */
147 static int s3c_rtc_setfreq(struct s3c_rtc *info, int freq)
149 if (!is_power_of_2(freq))
152 spin_lock_irq(&info->pie_lock);
154 if (info->data->set_freq)
155 info->data->set_freq(info, freq);
157 spin_unlock_irq(&info->pie_lock);
162 /* Time read/write */
163 static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
165 struct s3c_rtc *info = dev_get_drvdata(dev);
166 unsigned int have_retried = 0;
168 s3c_rtc_enable_clk(info);
171 rtc_tm->tm_min = readb(info->base + S3C2410_RTCMIN);
172 rtc_tm->tm_hour = readb(info->base + S3C2410_RTCHOUR);
173 rtc_tm->tm_mday = readb(info->base + S3C2410_RTCDATE);
174 rtc_tm->tm_mon = readb(info->base + S3C2410_RTCMON);
175 rtc_tm->tm_year = readb(info->base + S3C2410_RTCYEAR);
176 rtc_tm->tm_sec = readb(info->base + S3C2410_RTCSEC);
178 /* the only way to work out whether the system was mid-update
179 * when we read it is to check the second counter, and if it
180 * is zero, then we re-try the entire read
183 if (rtc_tm->tm_sec == 0 && !have_retried) {
188 rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
189 rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
190 rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
191 rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
192 rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
193 rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
195 s3c_rtc_disable_clk(info);
197 rtc_tm->tm_year += 100;
199 dev_dbg(dev, "read time %04d.%02d.%02d %02d:%02d:%02d\n",
200 1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
201 rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
205 return rtc_valid_tm(rtc_tm);
208 static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
210 struct s3c_rtc *info = dev_get_drvdata(dev);
211 int year = tm->tm_year - 100;
213 dev_dbg(dev, "set time %04d.%02d.%02d %02d:%02d:%02d\n",
214 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
215 tm->tm_hour, tm->tm_min, tm->tm_sec);
217 /* we get around y2k by simply not supporting it */
219 if (year < 0 || year >= 100) {
220 dev_err(dev, "rtc only supports 100 years\n");
224 s3c_rtc_enable_clk(info);
226 writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_RTCSEC);
227 writeb(bin2bcd(tm->tm_min), info->base + S3C2410_RTCMIN);
228 writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR);
229 writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE);
230 writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_RTCMON);
231 writeb(bin2bcd(year), info->base + S3C2410_RTCYEAR);
233 s3c_rtc_disable_clk(info);
238 static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
240 struct s3c_rtc *info = dev_get_drvdata(dev);
241 struct rtc_time *alm_tm = &alrm->time;
244 s3c_rtc_enable_clk(info);
246 alm_tm->tm_sec = readb(info->base + S3C2410_ALMSEC);
247 alm_tm->tm_min = readb(info->base + S3C2410_ALMMIN);
248 alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR);
249 alm_tm->tm_mon = readb(info->base + S3C2410_ALMMON);
250 alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE);
251 alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR);
253 alm_en = readb(info->base + S3C2410_RTCALM);
255 s3c_rtc_disable_clk(info);
257 alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
259 dev_dbg(dev, "read alarm %d, %04d.%02d.%02d %02d:%02d:%02d\n",
261 1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
262 alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec);
264 /* decode the alarm enable field */
265 if (alm_en & S3C2410_RTCALM_SECEN)
266 alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
270 if (alm_en & S3C2410_RTCALM_MINEN)
271 alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
275 if (alm_en & S3C2410_RTCALM_HOUREN)
276 alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
278 alm_tm->tm_hour = -1;
280 if (alm_en & S3C2410_RTCALM_DAYEN)
281 alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);
283 alm_tm->tm_mday = -1;
285 if (alm_en & S3C2410_RTCALM_MONEN) {
286 alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
292 if (alm_en & S3C2410_RTCALM_YEAREN)
293 alm_tm->tm_year = bcd2bin(alm_tm->tm_year);
295 alm_tm->tm_year = -1;
300 static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
302 struct s3c_rtc *info = dev_get_drvdata(dev);
303 struct rtc_time *tm = &alrm->time;
304 unsigned int alrm_en;
306 dev_dbg(dev, "s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
308 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
309 tm->tm_hour, tm->tm_min, tm->tm_sec);
311 s3c_rtc_enable_clk(info);
313 alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
314 writeb(0x00, info->base + S3C2410_RTCALM);
316 if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
317 alrm_en |= S3C2410_RTCALM_SECEN;
318 writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_ALMSEC);
321 if (tm->tm_min < 60 && tm->tm_min >= 0) {
322 alrm_en |= S3C2410_RTCALM_MINEN;
323 writeb(bin2bcd(tm->tm_min), info->base + S3C2410_ALMMIN);
326 if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
327 alrm_en |= S3C2410_RTCALM_HOUREN;
328 writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_ALMHOUR);
331 dev_dbg(dev, "setting S3C2410_RTCALM to %08x\n", alrm_en);
333 writeb(alrm_en, info->base + S3C2410_RTCALM);
335 s3c_rtc_disable_clk(info);
337 s3c_rtc_setaie(dev, alrm->enabled);
342 static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
344 struct s3c_rtc *info = dev_get_drvdata(dev);
346 s3c_rtc_enable_clk(info);
348 if (info->data->enable_tick)
349 info->data->enable_tick(info, seq);
351 s3c_rtc_disable_clk(info);
356 static const struct rtc_class_ops s3c_rtcops = {
357 .read_time = s3c_rtc_gettime,
358 .set_time = s3c_rtc_settime,
359 .read_alarm = s3c_rtc_getalarm,
360 .set_alarm = s3c_rtc_setalarm,
361 .proc = s3c_rtc_proc,
362 .alarm_irq_enable = s3c_rtc_setaie,
365 static void s3c24xx_rtc_enable(struct s3c_rtc *info)
367 unsigned int con, tmp;
369 con = readw(info->base + S3C2410_RTCCON);
370 /* re-enable the device, and check it is ok */
371 if ((con & S3C2410_RTCCON_RTCEN) == 0) {
372 dev_info(info->dev, "rtc disabled, re-enabling\n");
374 tmp = readw(info->base + S3C2410_RTCCON);
375 writew(tmp | S3C2410_RTCCON_RTCEN,
376 info->base + S3C2410_RTCCON);
379 if (con & S3C2410_RTCCON_CNTSEL) {
380 dev_info(info->dev, "removing RTCCON_CNTSEL\n");
382 tmp = readw(info->base + S3C2410_RTCCON);
383 writew(tmp & ~S3C2410_RTCCON_CNTSEL,
384 info->base + S3C2410_RTCCON);
387 if (con & S3C2410_RTCCON_CLKRST) {
388 dev_info(info->dev, "removing RTCCON_CLKRST\n");
390 tmp = readw(info->base + S3C2410_RTCCON);
391 writew(tmp & ~S3C2410_RTCCON_CLKRST,
392 info->base + S3C2410_RTCCON);
396 static void s3c24xx_rtc_disable(struct s3c_rtc *info)
400 con = readw(info->base + S3C2410_RTCCON);
401 con &= ~S3C2410_RTCCON_RTCEN;
402 writew(con, info->base + S3C2410_RTCCON);
404 con = readb(info->base + S3C2410_TICNT);
405 con &= ~S3C2410_TICNT_ENABLE;
406 writeb(con, info->base + S3C2410_TICNT);
409 static void s3c6410_rtc_disable(struct s3c_rtc *info)
413 con = readw(info->base + S3C2410_RTCCON);
414 con &= ~S3C64XX_RTCCON_TICEN;
415 con &= ~S3C2410_RTCCON_RTCEN;
416 writew(con, info->base + S3C2410_RTCCON);
419 static int s3c_rtc_remove(struct platform_device *pdev)
421 struct s3c_rtc *info = platform_get_drvdata(pdev);
423 s3c_rtc_setaie(info->dev, 0);
425 if (info->data->needs_src_clk)
426 clk_unprepare(info->rtc_src_clk);
427 clk_unprepare(info->rtc_clk);
432 static const struct of_device_id s3c_rtc_dt_match[];
434 static struct s3c_rtc_data *s3c_rtc_get_data(struct platform_device *pdev)
436 const struct of_device_id *match;
438 match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node);
439 return (struct s3c_rtc_data *)match->data;
442 static int s3c_rtc_probe(struct platform_device *pdev)
444 struct s3c_rtc *info = NULL;
445 struct rtc_time rtc_tm;
446 struct resource *res;
449 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
454 info->irq_tick = platform_get_irq(pdev, 1);
455 if (info->irq_tick < 0) {
456 dev_err(&pdev->dev, "no irq for rtc tick\n");
457 return info->irq_tick;
460 info->dev = &pdev->dev;
461 info->data = s3c_rtc_get_data(pdev);
463 dev_err(&pdev->dev, "failed getting s3c_rtc_data\n");
466 spin_lock_init(&info->pie_lock);
467 spin_lock_init(&info->alarm_clk_lock);
469 platform_set_drvdata(pdev, info);
471 info->irq_alarm = platform_get_irq(pdev, 0);
472 if (info->irq_alarm < 0) {
473 dev_err(&pdev->dev, "no irq for alarm\n");
474 return info->irq_alarm;
477 dev_dbg(&pdev->dev, "s3c2410_rtc: tick irq %d, alarm irq %d\n",
478 info->irq_tick, info->irq_alarm);
480 /* get the memory region */
481 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
482 info->base = devm_ioremap_resource(&pdev->dev, res);
483 if (IS_ERR(info->base))
484 return PTR_ERR(info->base);
486 info->rtc_clk = devm_clk_get(&pdev->dev, "rtc");
487 if (IS_ERR(info->rtc_clk)) {
488 dev_err(&pdev->dev, "failed to find rtc clock\n");
489 return PTR_ERR(info->rtc_clk);
491 clk_prepare_enable(info->rtc_clk);
493 if (info->data->needs_src_clk) {
494 info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src");
495 if (IS_ERR(info->rtc_src_clk)) {
497 "failed to find rtc source clock\n");
498 clk_disable_unprepare(info->rtc_clk);
499 return PTR_ERR(info->rtc_src_clk);
501 clk_prepare_enable(info->rtc_src_clk);
504 /* check to see if everything is setup correctly */
505 if (info->data->enable)
506 info->data->enable(info);
508 dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n",
509 readw(info->base + S3C2410_RTCCON));
511 device_init_wakeup(&pdev->dev, 1);
514 if (s3c_rtc_gettime(&pdev->dev, &rtc_tm)) {
515 rtc_tm.tm_year = 100;
522 s3c_rtc_settime(&pdev->dev, &rtc_tm);
524 dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
527 /* register RTC and exit */
528 info->rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops,
530 if (IS_ERR(info->rtc)) {
531 dev_err(&pdev->dev, "cannot attach rtc\n");
532 ret = PTR_ERR(info->rtc);
536 ret = devm_request_irq(&pdev->dev, info->irq_alarm, s3c_rtc_alarmirq,
537 0, "s3c2410-rtc alarm", info);
539 dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_alarm, ret);
543 ret = devm_request_irq(&pdev->dev, info->irq_tick, s3c_rtc_tickirq,
544 0, "s3c2410-rtc tick", info);
546 dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_tick, ret);
550 if (info->data->select_tick_clk)
551 info->data->select_tick_clk(info);
553 s3c_rtc_setfreq(info, 1);
555 s3c_rtc_disable_clk(info);
560 if (info->data->disable)
561 info->data->disable(info);
563 if (info->data->needs_src_clk)
564 clk_disable_unprepare(info->rtc_src_clk);
565 clk_disable_unprepare(info->rtc_clk);
570 #ifdef CONFIG_PM_SLEEP
572 static int s3c_rtc_suspend(struct device *dev)
574 struct s3c_rtc *info = dev_get_drvdata(dev);
576 s3c_rtc_enable_clk(info);
578 /* save TICNT for anyone using periodic interrupts */
579 if (info->data->save_tick_cnt)
580 info->data->save_tick_cnt(info);
582 if (info->data->disable)
583 info->data->disable(info);
585 if (device_may_wakeup(dev) && !info->wake_en) {
586 if (enable_irq_wake(info->irq_alarm) == 0)
587 info->wake_en = true;
589 dev_err(dev, "enable_irq_wake failed\n");
595 static int s3c_rtc_resume(struct device *dev)
597 struct s3c_rtc *info = dev_get_drvdata(dev);
599 if (info->data->enable)
600 info->data->enable(info);
602 if (info->data->restore_tick_cnt)
603 info->data->restore_tick_cnt(info);
605 s3c_rtc_disable_clk(info);
607 if (device_may_wakeup(dev) && info->wake_en) {
608 disable_irq_wake(info->irq_alarm);
609 info->wake_en = false;
615 static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
617 static void s3c24xx_rtc_irq(struct s3c_rtc *info, int mask)
619 rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
622 static void s3c6410_rtc_irq(struct s3c_rtc *info, int mask)
624 rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
625 writeb(mask, info->base + S3C2410_INTP);
628 static void s3c2410_rtc_setfreq(struct s3c_rtc *info, int freq)
630 unsigned int tmp = 0;
633 tmp = readb(info->base + S3C2410_TICNT);
634 tmp &= S3C2410_TICNT_ENABLE;
636 val = (info->rtc->max_user_freq / freq) - 1;
639 writel(tmp, info->base + S3C2410_TICNT);
642 static void s3c2416_rtc_setfreq(struct s3c_rtc *info, int freq)
644 unsigned int tmp = 0;
647 tmp = readb(info->base + S3C2410_TICNT);
648 tmp &= S3C2410_TICNT_ENABLE;
650 val = (info->rtc->max_user_freq / freq) - 1;
652 tmp |= S3C2443_TICNT_PART(val);
653 writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1);
655 writel(S3C2416_TICNT2_PART(val), info->base + S3C2416_TICNT2);
657 writel(tmp, info->base + S3C2410_TICNT);
660 static void s3c2443_rtc_setfreq(struct s3c_rtc *info, int freq)
662 unsigned int tmp = 0;
665 tmp = readb(info->base + S3C2410_TICNT);
666 tmp &= S3C2410_TICNT_ENABLE;
668 val = (info->rtc->max_user_freq / freq) - 1;
670 tmp |= S3C2443_TICNT_PART(val);
671 writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1);
673 writel(tmp, info->base + S3C2410_TICNT);
676 static void s3c6410_rtc_setfreq(struct s3c_rtc *info, int freq)
680 val = (info->rtc->max_user_freq / freq) - 1;
681 writel(val, info->base + S3C2410_TICNT);
684 static void s3c24xx_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq)
688 ticnt = readb(info->base + S3C2410_TICNT);
689 ticnt &= S3C2410_TICNT_ENABLE;
691 seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
694 static void s3c2416_rtc_select_tick_clk(struct s3c_rtc *info)
698 con = readw(info->base + S3C2410_RTCCON);
699 con |= S3C2443_RTCCON_TICSEL;
700 writew(con, info->base + S3C2410_RTCCON);
703 static void s3c6410_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq)
707 ticnt = readw(info->base + S3C2410_RTCCON);
708 ticnt &= S3C64XX_RTCCON_TICEN;
710 seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
713 static void s3c24xx_rtc_save_tick_cnt(struct s3c_rtc *info)
715 info->ticnt_save = readb(info->base + S3C2410_TICNT);
718 static void s3c24xx_rtc_restore_tick_cnt(struct s3c_rtc *info)
720 writeb(info->ticnt_save, info->base + S3C2410_TICNT);
723 static void s3c6410_rtc_save_tick_cnt(struct s3c_rtc *info)
725 info->ticnt_en_save = readw(info->base + S3C2410_RTCCON);
726 info->ticnt_en_save &= S3C64XX_RTCCON_TICEN;
727 info->ticnt_save = readl(info->base + S3C2410_TICNT);
730 static void s3c6410_rtc_restore_tick_cnt(struct s3c_rtc *info)
734 writel(info->ticnt_save, info->base + S3C2410_TICNT);
735 if (info->ticnt_en_save) {
736 con = readw(info->base + S3C2410_RTCCON);
737 writew(con | info->ticnt_en_save,
738 info->base + S3C2410_RTCCON);
742 static struct s3c_rtc_data const s3c2410_rtc_data = {
743 .max_user_freq = 128,
744 .irq_handler = s3c24xx_rtc_irq,
745 .set_freq = s3c2410_rtc_setfreq,
746 .enable_tick = s3c24xx_rtc_enable_tick,
747 .save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
748 .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
749 .enable = s3c24xx_rtc_enable,
750 .disable = s3c24xx_rtc_disable,
753 static struct s3c_rtc_data const s3c2416_rtc_data = {
754 .max_user_freq = 32768,
755 .irq_handler = s3c24xx_rtc_irq,
756 .set_freq = s3c2416_rtc_setfreq,
757 .enable_tick = s3c24xx_rtc_enable_tick,
758 .select_tick_clk = s3c2416_rtc_select_tick_clk,
759 .save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
760 .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
761 .enable = s3c24xx_rtc_enable,
762 .disable = s3c24xx_rtc_disable,
765 static struct s3c_rtc_data const s3c2443_rtc_data = {
766 .max_user_freq = 32768,
767 .irq_handler = s3c24xx_rtc_irq,
768 .set_freq = s3c2443_rtc_setfreq,
769 .enable_tick = s3c24xx_rtc_enable_tick,
770 .select_tick_clk = s3c2416_rtc_select_tick_clk,
771 .save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
772 .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
773 .enable = s3c24xx_rtc_enable,
774 .disable = s3c24xx_rtc_disable,
777 static struct s3c_rtc_data const s3c6410_rtc_data = {
778 .max_user_freq = 32768,
779 .needs_src_clk = true,
780 .irq_handler = s3c6410_rtc_irq,
781 .set_freq = s3c6410_rtc_setfreq,
782 .enable_tick = s3c6410_rtc_enable_tick,
783 .save_tick_cnt = s3c6410_rtc_save_tick_cnt,
784 .restore_tick_cnt = s3c6410_rtc_restore_tick_cnt,
785 .enable = s3c24xx_rtc_enable,
786 .disable = s3c6410_rtc_disable,
789 static const struct of_device_id s3c_rtc_dt_match[] = {
791 .compatible = "samsung,s3c2410-rtc",
792 .data = (void *)&s3c2410_rtc_data,
794 .compatible = "samsung,s3c2416-rtc",
795 .data = (void *)&s3c2416_rtc_data,
797 .compatible = "samsung,s3c2443-rtc",
798 .data = (void *)&s3c2443_rtc_data,
800 .compatible = "samsung,s3c6410-rtc",
801 .data = (void *)&s3c6410_rtc_data,
803 .compatible = "samsung,exynos3250-rtc",
804 .data = (void *)&s3c6410_rtc_data,
808 MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
810 static struct platform_driver s3c_rtc_driver = {
811 .probe = s3c_rtc_probe,
812 .remove = s3c_rtc_remove,
815 .pm = &s3c_rtc_pm_ops,
816 .of_match_table = of_match_ptr(s3c_rtc_dt_match),
819 module_platform_driver(s3c_rtc_driver);
821 MODULE_DESCRIPTION("Samsung S3C RTC Driver");
822 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
823 MODULE_LICENSE("GPL");
824 MODULE_ALIAS("platform:s3c2410-rtc");