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 s3c_rtc_enable_clk(info);
153 spin_lock_irq(&info->pie_lock);
155 if (info->data->set_freq)
156 info->data->set_freq(info, freq);
158 spin_unlock_irq(&info->pie_lock);
159 s3c_rtc_disable_clk(info);
164 /* Time read/write */
165 static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
167 struct s3c_rtc *info = dev_get_drvdata(dev);
168 unsigned int have_retried = 0;
170 s3c_rtc_enable_clk(info);
173 rtc_tm->tm_min = readb(info->base + S3C2410_RTCMIN);
174 rtc_tm->tm_hour = readb(info->base + S3C2410_RTCHOUR);
175 rtc_tm->tm_mday = readb(info->base + S3C2410_RTCDATE);
176 rtc_tm->tm_mon = readb(info->base + S3C2410_RTCMON);
177 rtc_tm->tm_year = readb(info->base + S3C2410_RTCYEAR);
178 rtc_tm->tm_sec = readb(info->base + S3C2410_RTCSEC);
180 /* the only way to work out whether the system was mid-update
181 * when we read it is to check the second counter, and if it
182 * is zero, then we re-try the entire read
185 if (rtc_tm->tm_sec == 0 && !have_retried) {
190 rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
191 rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
192 rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
193 rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
194 rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
195 rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
197 s3c_rtc_disable_clk(info);
199 rtc_tm->tm_year += 100;
201 dev_dbg(dev, "read time %04d.%02d.%02d %02d:%02d:%02d\n",
202 1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
203 rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
207 return rtc_valid_tm(rtc_tm);
210 static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
212 struct s3c_rtc *info = dev_get_drvdata(dev);
213 int year = tm->tm_year - 100;
215 dev_dbg(dev, "set time %04d.%02d.%02d %02d:%02d:%02d\n",
216 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
217 tm->tm_hour, tm->tm_min, tm->tm_sec);
219 /* we get around y2k by simply not supporting it */
221 if (year < 0 || year >= 100) {
222 dev_err(dev, "rtc only supports 100 years\n");
226 s3c_rtc_enable_clk(info);
228 writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_RTCSEC);
229 writeb(bin2bcd(tm->tm_min), info->base + S3C2410_RTCMIN);
230 writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR);
231 writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE);
232 writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_RTCMON);
233 writeb(bin2bcd(year), info->base + S3C2410_RTCYEAR);
235 s3c_rtc_disable_clk(info);
240 static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
242 struct s3c_rtc *info = dev_get_drvdata(dev);
243 struct rtc_time *alm_tm = &alrm->time;
246 s3c_rtc_enable_clk(info);
248 alm_tm->tm_sec = readb(info->base + S3C2410_ALMSEC);
249 alm_tm->tm_min = readb(info->base + S3C2410_ALMMIN);
250 alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR);
251 alm_tm->tm_mon = readb(info->base + S3C2410_ALMMON);
252 alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE);
253 alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR);
255 alm_en = readb(info->base + S3C2410_RTCALM);
257 s3c_rtc_disable_clk(info);
259 alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
261 dev_dbg(dev, "read alarm %d, %04d.%02d.%02d %02d:%02d:%02d\n",
263 1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
264 alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec);
266 /* decode the alarm enable field */
267 if (alm_en & S3C2410_RTCALM_SECEN)
268 alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
272 if (alm_en & S3C2410_RTCALM_MINEN)
273 alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
277 if (alm_en & S3C2410_RTCALM_HOUREN)
278 alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
280 alm_tm->tm_hour = -1;
282 if (alm_en & S3C2410_RTCALM_DAYEN)
283 alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);
285 alm_tm->tm_mday = -1;
287 if (alm_en & S3C2410_RTCALM_MONEN) {
288 alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
294 if (alm_en & S3C2410_RTCALM_YEAREN)
295 alm_tm->tm_year = bcd2bin(alm_tm->tm_year);
297 alm_tm->tm_year = -1;
302 static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
304 struct s3c_rtc *info = dev_get_drvdata(dev);
305 struct rtc_time *tm = &alrm->time;
306 unsigned int alrm_en;
307 int year = tm->tm_year - 100;
309 dev_dbg(dev, "s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
311 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
312 tm->tm_hour, tm->tm_min, tm->tm_sec);
314 s3c_rtc_enable_clk(info);
316 alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
317 writeb(0x00, info->base + S3C2410_RTCALM);
319 if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
320 alrm_en |= S3C2410_RTCALM_SECEN;
321 writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_ALMSEC);
324 if (tm->tm_min < 60 && tm->tm_min >= 0) {
325 alrm_en |= S3C2410_RTCALM_MINEN;
326 writeb(bin2bcd(tm->tm_min), info->base + S3C2410_ALMMIN);
329 if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
330 alrm_en |= S3C2410_RTCALM_HOUREN;
331 writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_ALMHOUR);
334 if (year < 100 && year >= 0) {
335 alrm_en |= S3C2410_RTCALM_YEAREN;
336 writeb(bin2bcd(year), info->base + S3C2410_ALMYEAR);
339 if (tm->tm_mon < 12 && tm->tm_mon >= 0) {
340 alrm_en |= S3C2410_RTCALM_MONEN;
341 writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_ALMMON);
344 if (tm->tm_mday <= 31 && tm->tm_mday >= 1) {
345 alrm_en |= S3C2410_RTCALM_DAYEN;
346 writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_ALMDATE);
349 dev_dbg(dev, "setting S3C2410_RTCALM to %08x\n", alrm_en);
351 writeb(alrm_en, info->base + S3C2410_RTCALM);
353 s3c_rtc_disable_clk(info);
355 s3c_rtc_setaie(dev, alrm->enabled);
360 static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
362 struct s3c_rtc *info = dev_get_drvdata(dev);
364 s3c_rtc_enable_clk(info);
366 if (info->data->enable_tick)
367 info->data->enable_tick(info, seq);
369 s3c_rtc_disable_clk(info);
374 static const struct rtc_class_ops s3c_rtcops = {
375 .read_time = s3c_rtc_gettime,
376 .set_time = s3c_rtc_settime,
377 .read_alarm = s3c_rtc_getalarm,
378 .set_alarm = s3c_rtc_setalarm,
379 .proc = s3c_rtc_proc,
380 .alarm_irq_enable = s3c_rtc_setaie,
383 static void s3c24xx_rtc_enable(struct s3c_rtc *info)
385 unsigned int con, tmp;
387 con = readw(info->base + S3C2410_RTCCON);
388 /* re-enable the device, and check it is ok */
389 if ((con & S3C2410_RTCCON_RTCEN) == 0) {
390 dev_info(info->dev, "rtc disabled, re-enabling\n");
392 tmp = readw(info->base + S3C2410_RTCCON);
393 writew(tmp | S3C2410_RTCCON_RTCEN,
394 info->base + S3C2410_RTCCON);
397 if (con & S3C2410_RTCCON_CNTSEL) {
398 dev_info(info->dev, "removing RTCCON_CNTSEL\n");
400 tmp = readw(info->base + S3C2410_RTCCON);
401 writew(tmp & ~S3C2410_RTCCON_CNTSEL,
402 info->base + S3C2410_RTCCON);
405 if (con & S3C2410_RTCCON_CLKRST) {
406 dev_info(info->dev, "removing RTCCON_CLKRST\n");
408 tmp = readw(info->base + S3C2410_RTCCON);
409 writew(tmp & ~S3C2410_RTCCON_CLKRST,
410 info->base + S3C2410_RTCCON);
414 static void s3c24xx_rtc_disable(struct s3c_rtc *info)
418 con = readw(info->base + S3C2410_RTCCON);
419 con &= ~S3C2410_RTCCON_RTCEN;
420 writew(con, info->base + S3C2410_RTCCON);
422 con = readb(info->base + S3C2410_TICNT);
423 con &= ~S3C2410_TICNT_ENABLE;
424 writeb(con, info->base + S3C2410_TICNT);
427 static void s3c6410_rtc_disable(struct s3c_rtc *info)
431 con = readw(info->base + S3C2410_RTCCON);
432 con &= ~S3C64XX_RTCCON_TICEN;
433 con &= ~S3C2410_RTCCON_RTCEN;
434 writew(con, info->base + S3C2410_RTCCON);
437 static int s3c_rtc_remove(struct platform_device *pdev)
439 struct s3c_rtc *info = platform_get_drvdata(pdev);
441 s3c_rtc_setaie(info->dev, 0);
443 if (info->data->needs_src_clk)
444 clk_unprepare(info->rtc_src_clk);
445 clk_unprepare(info->rtc_clk);
450 static const struct of_device_id s3c_rtc_dt_match[];
452 static struct s3c_rtc_data *s3c_rtc_get_data(struct platform_device *pdev)
454 const struct of_device_id *match;
456 match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node);
457 return (struct s3c_rtc_data *)match->data;
460 static int s3c_rtc_probe(struct platform_device *pdev)
462 struct s3c_rtc *info = NULL;
463 struct rtc_time rtc_tm;
464 struct resource *res;
467 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
472 info->irq_tick = platform_get_irq(pdev, 1);
473 if (info->irq_tick < 0) {
474 dev_err(&pdev->dev, "no irq for rtc tick\n");
475 return info->irq_tick;
478 info->dev = &pdev->dev;
479 info->data = s3c_rtc_get_data(pdev);
481 dev_err(&pdev->dev, "failed getting s3c_rtc_data\n");
484 spin_lock_init(&info->pie_lock);
485 spin_lock_init(&info->alarm_clk_lock);
487 platform_set_drvdata(pdev, info);
489 info->irq_alarm = platform_get_irq(pdev, 0);
490 if (info->irq_alarm < 0) {
491 dev_err(&pdev->dev, "no irq for alarm\n");
492 return info->irq_alarm;
495 dev_dbg(&pdev->dev, "s3c2410_rtc: tick irq %d, alarm irq %d\n",
496 info->irq_tick, info->irq_alarm);
498 /* get the memory region */
499 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
500 info->base = devm_ioremap_resource(&pdev->dev, res);
501 if (IS_ERR(info->base))
502 return PTR_ERR(info->base);
504 info->rtc_clk = devm_clk_get(&pdev->dev, "rtc");
505 if (IS_ERR(info->rtc_clk)) {
506 dev_err(&pdev->dev, "failed to find rtc clock\n");
507 return PTR_ERR(info->rtc_clk);
509 clk_prepare_enable(info->rtc_clk);
511 if (info->data->needs_src_clk) {
512 info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src");
513 if (IS_ERR(info->rtc_src_clk)) {
515 "failed to find rtc source clock\n");
516 clk_disable_unprepare(info->rtc_clk);
517 return PTR_ERR(info->rtc_src_clk);
519 clk_prepare_enable(info->rtc_src_clk);
522 /* check to see if everything is setup correctly */
523 if (info->data->enable)
524 info->data->enable(info);
526 dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n",
527 readw(info->base + S3C2410_RTCCON));
529 device_init_wakeup(&pdev->dev, 1);
532 if (s3c_rtc_gettime(&pdev->dev, &rtc_tm)) {
533 rtc_tm.tm_year = 100;
540 s3c_rtc_settime(&pdev->dev, &rtc_tm);
542 dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
545 /* register RTC and exit */
546 info->rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops,
548 if (IS_ERR(info->rtc)) {
549 dev_err(&pdev->dev, "cannot attach rtc\n");
550 ret = PTR_ERR(info->rtc);
554 ret = devm_request_irq(&pdev->dev, info->irq_alarm, s3c_rtc_alarmirq,
555 0, "s3c2410-rtc alarm", info);
557 dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_alarm, ret);
561 ret = devm_request_irq(&pdev->dev, info->irq_tick, s3c_rtc_tickirq,
562 0, "s3c2410-rtc tick", info);
564 dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_tick, ret);
568 if (info->data->select_tick_clk)
569 info->data->select_tick_clk(info);
571 s3c_rtc_setfreq(info, 1);
573 s3c_rtc_disable_clk(info);
578 if (info->data->disable)
579 info->data->disable(info);
581 if (info->data->needs_src_clk)
582 clk_disable_unprepare(info->rtc_src_clk);
583 clk_disable_unprepare(info->rtc_clk);
588 #ifdef CONFIG_PM_SLEEP
590 static int s3c_rtc_suspend(struct device *dev)
592 struct s3c_rtc *info = dev_get_drvdata(dev);
594 s3c_rtc_enable_clk(info);
596 /* save TICNT for anyone using periodic interrupts */
597 if (info->data->save_tick_cnt)
598 info->data->save_tick_cnt(info);
600 if (info->data->disable)
601 info->data->disable(info);
603 if (device_may_wakeup(dev) && !info->wake_en) {
604 if (enable_irq_wake(info->irq_alarm) == 0)
605 info->wake_en = true;
607 dev_err(dev, "enable_irq_wake failed\n");
613 static int s3c_rtc_resume(struct device *dev)
615 struct s3c_rtc *info = dev_get_drvdata(dev);
617 if (info->data->enable)
618 info->data->enable(info);
620 if (info->data->restore_tick_cnt)
621 info->data->restore_tick_cnt(info);
623 s3c_rtc_disable_clk(info);
625 if (device_may_wakeup(dev) && info->wake_en) {
626 disable_irq_wake(info->irq_alarm);
627 info->wake_en = false;
633 static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
635 static void s3c24xx_rtc_irq(struct s3c_rtc *info, int mask)
637 rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
640 static void s3c6410_rtc_irq(struct s3c_rtc *info, int mask)
642 rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
643 writeb(mask, info->base + S3C2410_INTP);
646 static void s3c2410_rtc_setfreq(struct s3c_rtc *info, int freq)
648 unsigned int tmp = 0;
651 tmp = readb(info->base + S3C2410_TICNT);
652 tmp &= S3C2410_TICNT_ENABLE;
654 val = (info->rtc->max_user_freq / freq) - 1;
657 writel(tmp, info->base + S3C2410_TICNT);
660 static void s3c2416_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(S3C2416_TICNT2_PART(val), info->base + S3C2416_TICNT2);
675 writel(tmp, info->base + S3C2410_TICNT);
678 static void s3c2443_rtc_setfreq(struct s3c_rtc *info, int freq)
680 unsigned int tmp = 0;
683 tmp = readb(info->base + S3C2410_TICNT);
684 tmp &= S3C2410_TICNT_ENABLE;
686 val = (info->rtc->max_user_freq / freq) - 1;
688 tmp |= S3C2443_TICNT_PART(val);
689 writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1);
691 writel(tmp, info->base + S3C2410_TICNT);
694 static void s3c6410_rtc_setfreq(struct s3c_rtc *info, int freq)
698 val = (info->rtc->max_user_freq / freq) - 1;
699 writel(val, info->base + S3C2410_TICNT);
702 static void s3c24xx_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq)
706 ticnt = readb(info->base + S3C2410_TICNT);
707 ticnt &= S3C2410_TICNT_ENABLE;
709 seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
712 static void s3c2416_rtc_select_tick_clk(struct s3c_rtc *info)
716 con = readw(info->base + S3C2410_RTCCON);
717 con |= S3C2443_RTCCON_TICSEL;
718 writew(con, info->base + S3C2410_RTCCON);
721 static void s3c6410_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq)
725 ticnt = readw(info->base + S3C2410_RTCCON);
726 ticnt &= S3C64XX_RTCCON_TICEN;
728 seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
731 static void s3c24xx_rtc_save_tick_cnt(struct s3c_rtc *info)
733 info->ticnt_save = readb(info->base + S3C2410_TICNT);
736 static void s3c24xx_rtc_restore_tick_cnt(struct s3c_rtc *info)
738 writeb(info->ticnt_save, info->base + S3C2410_TICNT);
741 static void s3c6410_rtc_save_tick_cnt(struct s3c_rtc *info)
743 info->ticnt_en_save = readw(info->base + S3C2410_RTCCON);
744 info->ticnt_en_save &= S3C64XX_RTCCON_TICEN;
745 info->ticnt_save = readl(info->base + S3C2410_TICNT);
748 static void s3c6410_rtc_restore_tick_cnt(struct s3c_rtc *info)
752 writel(info->ticnt_save, info->base + S3C2410_TICNT);
753 if (info->ticnt_en_save) {
754 con = readw(info->base + S3C2410_RTCCON);
755 writew(con | info->ticnt_en_save,
756 info->base + S3C2410_RTCCON);
760 static struct s3c_rtc_data const s3c2410_rtc_data = {
761 .max_user_freq = 128,
762 .irq_handler = s3c24xx_rtc_irq,
763 .set_freq = s3c2410_rtc_setfreq,
764 .enable_tick = s3c24xx_rtc_enable_tick,
765 .save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
766 .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
767 .enable = s3c24xx_rtc_enable,
768 .disable = s3c24xx_rtc_disable,
771 static struct s3c_rtc_data const s3c2416_rtc_data = {
772 .max_user_freq = 32768,
773 .irq_handler = s3c24xx_rtc_irq,
774 .set_freq = s3c2416_rtc_setfreq,
775 .enable_tick = s3c24xx_rtc_enable_tick,
776 .select_tick_clk = s3c2416_rtc_select_tick_clk,
777 .save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
778 .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
779 .enable = s3c24xx_rtc_enable,
780 .disable = s3c24xx_rtc_disable,
783 static struct s3c_rtc_data const s3c2443_rtc_data = {
784 .max_user_freq = 32768,
785 .irq_handler = s3c24xx_rtc_irq,
786 .set_freq = s3c2443_rtc_setfreq,
787 .enable_tick = s3c24xx_rtc_enable_tick,
788 .select_tick_clk = s3c2416_rtc_select_tick_clk,
789 .save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
790 .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
791 .enable = s3c24xx_rtc_enable,
792 .disable = s3c24xx_rtc_disable,
795 static struct s3c_rtc_data const s3c6410_rtc_data = {
796 .max_user_freq = 32768,
797 .needs_src_clk = true,
798 .irq_handler = s3c6410_rtc_irq,
799 .set_freq = s3c6410_rtc_setfreq,
800 .enable_tick = s3c6410_rtc_enable_tick,
801 .save_tick_cnt = s3c6410_rtc_save_tick_cnt,
802 .restore_tick_cnt = s3c6410_rtc_restore_tick_cnt,
803 .enable = s3c24xx_rtc_enable,
804 .disable = s3c6410_rtc_disable,
807 static const struct of_device_id s3c_rtc_dt_match[] = {
809 .compatible = "samsung,s3c2410-rtc",
810 .data = (void *)&s3c2410_rtc_data,
812 .compatible = "samsung,s3c2416-rtc",
813 .data = (void *)&s3c2416_rtc_data,
815 .compatible = "samsung,s3c2443-rtc",
816 .data = (void *)&s3c2443_rtc_data,
818 .compatible = "samsung,s3c6410-rtc",
819 .data = (void *)&s3c6410_rtc_data,
821 .compatible = "samsung,exynos3250-rtc",
822 .data = (void *)&s3c6410_rtc_data,
826 MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
828 static struct platform_driver s3c_rtc_driver = {
829 .probe = s3c_rtc_probe,
830 .remove = s3c_rtc_remove,
833 .pm = &s3c_rtc_pm_ops,
834 .of_match_table = of_match_ptr(s3c_rtc_dt_match),
837 module_platform_driver(s3c_rtc_driver);
839 MODULE_DESCRIPTION("Samsung S3C RTC Driver");
840 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
841 MODULE_LICENSE("GPL");
842 MODULE_ALIAS("platform:s3c2410-rtc");