media: tegra: add supporting for RAW8/RAW10 input and output
[linux-2.6.git] / drivers / rtc / rtc-s3c.c
1 /* drivers/rtc/rtc-s3c.c
2  *
3  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
4  *              http://www.samsung.com/
5  *
6  * Copyright (c) 2004,2006 Simtec Electronics
7  *      Ben Dooks, <ben@simtec.co.uk>
8  *      http://armlinux.simtec.co.uk/
9  *
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.
13  *
14  * S3C2410/S3C2440/S3C24XX Internal RTC Driver
15 */
16
17 #include <linux/module.h>
18 #include <linux/fs.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>
28
29 #include <mach/hardware.h>
30 #include <asm/uaccess.h>
31 #include <asm/io.h>
32 #include <asm/irq.h>
33 #include <plat/regs-rtc.h>
34
35 enum s3c_cpu_type {
36         TYPE_S3C2410,
37         TYPE_S3C64XX,
38 };
39
40 /* I have yet to find an S3C implementation with more than one
41  * of these rtc blocks in */
42
43 static struct resource *s3c_rtc_mem;
44
45 static struct clk *rtc_clk;
46 static void __iomem *s3c_rtc_base;
47 static int s3c_rtc_alarmno = NO_IRQ;
48 static int s3c_rtc_tickno  = NO_IRQ;
49 static bool wake_en;
50 static enum s3c_cpu_type s3c_rtc_cpu_type;
51
52 static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
53
54 static void s3c_rtc_alarm_clk_enable(bool enable)
55 {
56         static DEFINE_SPINLOCK(s3c_rtc_alarm_clk_lock);
57         static bool alarm_clk_enabled;
58         unsigned long irq_flags;
59
60         spin_lock_irqsave(&s3c_rtc_alarm_clk_lock, irq_flags);
61         if (enable) {
62                 if (!alarm_clk_enabled) {
63                         clk_enable(rtc_clk);
64                         alarm_clk_enabled = true;
65                 }
66         } else {
67                 if (alarm_clk_enabled) {
68                         clk_disable(rtc_clk);
69                         alarm_clk_enabled = false;
70                 }
71         }
72         spin_unlock_irqrestore(&s3c_rtc_alarm_clk_lock, irq_flags);
73 }
74
75 /* IRQ Handlers */
76
77 static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
78 {
79         struct rtc_device *rdev = id;
80
81         clk_enable(rtc_clk);
82         rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF);
83
84         if (s3c_rtc_cpu_type == TYPE_S3C64XX)
85                 writeb(S3C2410_INTP_ALM, s3c_rtc_base + S3C2410_INTP);
86
87         clk_disable(rtc_clk);
88
89         s3c_rtc_alarm_clk_enable(false);
90
91         return IRQ_HANDLED;
92 }
93
94 static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
95 {
96         struct rtc_device *rdev = id;
97
98         clk_enable(rtc_clk);
99         rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF);
100
101         if (s3c_rtc_cpu_type == TYPE_S3C64XX)
102                 writeb(S3C2410_INTP_TIC, s3c_rtc_base + S3C2410_INTP);
103
104         clk_disable(rtc_clk);
105         return IRQ_HANDLED;
106 }
107
108 /* Update control registers */
109 static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
110 {
111         unsigned int tmp;
112
113         pr_debug("%s: aie=%d\n", __func__, enabled);
114
115         clk_enable(rtc_clk);
116         tmp = readb(s3c_rtc_base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
117
118         if (enabled)
119                 tmp |= S3C2410_RTCALM_ALMEN;
120
121         writeb(tmp, s3c_rtc_base + S3C2410_RTCALM);
122         clk_disable(rtc_clk);
123
124         s3c_rtc_alarm_clk_enable(enabled);
125
126         return 0;
127 }
128
129 static int s3c_rtc_setfreq(struct device *dev, int freq)
130 {
131         struct platform_device *pdev = to_platform_device(dev);
132         struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
133         unsigned int tmp = 0;
134
135         if (!is_power_of_2(freq))
136                 return -EINVAL;
137
138         clk_enable(rtc_clk);
139         spin_lock_irq(&s3c_rtc_pie_lock);
140
141         if (s3c_rtc_cpu_type == TYPE_S3C2410) {
142                 tmp = readb(s3c_rtc_base + S3C2410_TICNT);
143                 tmp &= S3C2410_TICNT_ENABLE;
144         }
145
146         tmp |= (rtc_dev->max_user_freq / freq)-1;
147
148         writel(tmp, s3c_rtc_base + S3C2410_TICNT);
149         spin_unlock_irq(&s3c_rtc_pie_lock);
150         clk_disable(rtc_clk);
151
152         return 0;
153 }
154
155 /* Time read/write */
156
157 static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
158 {
159         unsigned int have_retried = 0;
160         void __iomem *base = s3c_rtc_base;
161
162         clk_enable(rtc_clk);
163  retry_get_time:
164         rtc_tm->tm_min  = readb(base + S3C2410_RTCMIN);
165         rtc_tm->tm_hour = readb(base + S3C2410_RTCHOUR);
166         rtc_tm->tm_mday = readb(base + S3C2410_RTCDATE);
167         rtc_tm->tm_mon  = readb(base + S3C2410_RTCMON);
168         rtc_tm->tm_year = readb(base + S3C2410_RTCYEAR);
169         rtc_tm->tm_sec  = readb(base + S3C2410_RTCSEC);
170
171         /* the only way to work out wether the system was mid-update
172          * when we read it is to check the second counter, and if it
173          * is zero, then we re-try the entire read
174          */
175
176         if (rtc_tm->tm_sec == 0 && !have_retried) {
177                 have_retried = 1;
178                 goto retry_get_time;
179         }
180
181         rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
182         rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
183         rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
184         rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
185         rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
186         rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
187
188         rtc_tm->tm_year += 100;
189
190         pr_debug("read time %04d.%02d.%02d %02d:%02d:%02d\n",
191                  1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
192                  rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
193
194         rtc_tm->tm_mon -= 1;
195
196         clk_disable(rtc_clk);
197         return rtc_valid_tm(rtc_tm);
198 }
199
200 static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
201 {
202         void __iomem *base = s3c_rtc_base;
203         int year = tm->tm_year - 100;
204
205         pr_debug("set time %04d.%02d.%02d %02d:%02d:%02d\n",
206                  1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
207                  tm->tm_hour, tm->tm_min, tm->tm_sec);
208
209         /* we get around y2k by simply not supporting it */
210
211         if (year < 0 || year >= 100) {
212                 dev_err(dev, "rtc only supports 100 years\n");
213                 return -EINVAL;
214         }
215
216         clk_enable(rtc_clk);
217         writeb(bin2bcd(tm->tm_sec),  base + S3C2410_RTCSEC);
218         writeb(bin2bcd(tm->tm_min),  base + S3C2410_RTCMIN);
219         writeb(bin2bcd(tm->tm_hour), base + S3C2410_RTCHOUR);
220         writeb(bin2bcd(tm->tm_mday), base + S3C2410_RTCDATE);
221         writeb(bin2bcd(tm->tm_mon + 1), base + S3C2410_RTCMON);
222         writeb(bin2bcd(year), base + S3C2410_RTCYEAR);
223         clk_disable(rtc_clk);
224
225         return 0;
226 }
227
228 static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
229 {
230         struct rtc_time *alm_tm = &alrm->time;
231         void __iomem *base = s3c_rtc_base;
232         unsigned int alm_en;
233
234         clk_enable(rtc_clk);
235         alm_tm->tm_sec  = readb(base + S3C2410_ALMSEC);
236         alm_tm->tm_min  = readb(base + S3C2410_ALMMIN);
237         alm_tm->tm_hour = readb(base + S3C2410_ALMHOUR);
238         alm_tm->tm_mon  = readb(base + S3C2410_ALMMON);
239         alm_tm->tm_mday = readb(base + S3C2410_ALMDATE);
240         alm_tm->tm_year = readb(base + S3C2410_ALMYEAR);
241
242         alm_en = readb(base + S3C2410_RTCALM);
243
244         alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
245
246         pr_debug("read alarm %d, %04d.%02d.%02d %02d:%02d:%02d\n",
247                  alm_en,
248                  1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
249                  alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec);
250
251
252         /* decode the alarm enable field */
253
254         if (alm_en & S3C2410_RTCALM_SECEN)
255                 alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
256         else
257                 alm_tm->tm_sec = -1;
258
259         if (alm_en & S3C2410_RTCALM_MINEN)
260                 alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
261         else
262                 alm_tm->tm_min = -1;
263
264         if (alm_en & S3C2410_RTCALM_HOUREN)
265                 alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
266         else
267                 alm_tm->tm_hour = -1;
268
269         if (alm_en & S3C2410_RTCALM_DAYEN)
270                 alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);
271         else
272                 alm_tm->tm_mday = -1;
273
274         if (alm_en & S3C2410_RTCALM_MONEN) {
275                 alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
276                 alm_tm->tm_mon -= 1;
277         } else {
278                 alm_tm->tm_mon = -1;
279         }
280
281         if (alm_en & S3C2410_RTCALM_YEAREN)
282                 alm_tm->tm_year = bcd2bin(alm_tm->tm_year);
283         else
284                 alm_tm->tm_year = -1;
285
286         clk_disable(rtc_clk);
287         return 0;
288 }
289
290 static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
291 {
292         struct rtc_time *tm = &alrm->time;
293         void __iomem *base = s3c_rtc_base;
294         unsigned int alrm_en;
295
296         clk_enable(rtc_clk);
297         pr_debug("s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
298                  alrm->enabled,
299                  1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
300                  tm->tm_hour, tm->tm_min, tm->tm_sec);
301
302         alrm_en = readb(base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
303         writeb(0x00, base + S3C2410_RTCALM);
304
305         if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
306                 alrm_en |= S3C2410_RTCALM_SECEN;
307                 writeb(bin2bcd(tm->tm_sec), base + S3C2410_ALMSEC);
308         }
309
310         if (tm->tm_min < 60 && tm->tm_min >= 0) {
311                 alrm_en |= S3C2410_RTCALM_MINEN;
312                 writeb(bin2bcd(tm->tm_min), base + S3C2410_ALMMIN);
313         }
314
315         if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
316                 alrm_en |= S3C2410_RTCALM_HOUREN;
317                 writeb(bin2bcd(tm->tm_hour), base + S3C2410_ALMHOUR);
318         }
319
320         pr_debug("setting S3C2410_RTCALM to %08x\n", alrm_en);
321
322         writeb(alrm_en, base + S3C2410_RTCALM);
323
324         s3c_rtc_setaie(dev, alrm->enabled);
325
326         clk_disable(rtc_clk);
327         return 0;
328 }
329
330 static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
331 {
332         unsigned int ticnt;
333
334         clk_enable(rtc_clk);
335         if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
336                 ticnt = readw(s3c_rtc_base + S3C2410_RTCCON);
337                 ticnt &= S3C64XX_RTCCON_TICEN;
338         } else {
339                 ticnt = readb(s3c_rtc_base + S3C2410_TICNT);
340                 ticnt &= S3C2410_TICNT_ENABLE;
341         }
342
343         seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt  ? "yes" : "no");
344         clk_disable(rtc_clk);
345         return 0;
346 }
347
348 static const struct rtc_class_ops s3c_rtcops = {
349         .read_time      = s3c_rtc_gettime,
350         .set_time       = s3c_rtc_settime,
351         .read_alarm     = s3c_rtc_getalarm,
352         .set_alarm      = s3c_rtc_setalarm,
353         .proc           = s3c_rtc_proc,
354         .alarm_irq_enable = s3c_rtc_setaie,
355 };
356
357 static void s3c_rtc_enable(struct platform_device *pdev, int en)
358 {
359         void __iomem *base = s3c_rtc_base;
360         unsigned int tmp;
361
362         if (s3c_rtc_base == NULL)
363                 return;
364
365         clk_enable(rtc_clk);
366         if (!en) {
367                 tmp = readw(base + S3C2410_RTCCON);
368                 if (s3c_rtc_cpu_type == TYPE_S3C64XX)
369                         tmp &= ~S3C64XX_RTCCON_TICEN;
370                 tmp &= ~S3C2410_RTCCON_RTCEN;
371                 writew(tmp, base + S3C2410_RTCCON);
372
373                 if (s3c_rtc_cpu_type == TYPE_S3C2410) {
374                         tmp = readb(base + S3C2410_TICNT);
375                         tmp &= ~S3C2410_TICNT_ENABLE;
376                         writeb(tmp, base + S3C2410_TICNT);
377                 }
378         } else {
379                 /* re-enable the device, and check it is ok */
380
381                 if ((readw(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0) {
382                         dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
383
384                         tmp = readw(base + S3C2410_RTCCON);
385                         writew(tmp | S3C2410_RTCCON_RTCEN,
386                                 base + S3C2410_RTCCON);
387                 }
388
389                 if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)) {
390                         dev_info(&pdev->dev, "removing RTCCON_CNTSEL\n");
391
392                         tmp = readw(base + S3C2410_RTCCON);
393                         writew(tmp & ~S3C2410_RTCCON_CNTSEL,
394                                 base + S3C2410_RTCCON);
395                 }
396
397                 if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)) {
398                         dev_info(&pdev->dev, "removing RTCCON_CLKRST\n");
399
400                         tmp = readw(base + S3C2410_RTCCON);
401                         writew(tmp & ~S3C2410_RTCCON_CLKRST,
402                                 base + S3C2410_RTCCON);
403                 }
404         }
405         clk_disable(rtc_clk);
406 }
407
408 static int __devexit s3c_rtc_remove(struct platform_device *dev)
409 {
410         struct rtc_device *rtc = platform_get_drvdata(dev);
411
412         free_irq(s3c_rtc_alarmno, rtc);
413         free_irq(s3c_rtc_tickno, rtc);
414
415         platform_set_drvdata(dev, NULL);
416         rtc_device_unregister(rtc);
417
418         s3c_rtc_setaie(&dev->dev, 0);
419
420         clk_put(rtc_clk);
421         rtc_clk = NULL;
422
423         iounmap(s3c_rtc_base);
424         release_resource(s3c_rtc_mem);
425         kfree(s3c_rtc_mem);
426
427         return 0;
428 }
429
430 static int __devinit s3c_rtc_probe(struct platform_device *pdev)
431 {
432         struct rtc_device *rtc;
433         struct rtc_time rtc_tm;
434         struct resource *res;
435         int ret;
436
437         pr_debug("%s: probe=%p\n", __func__, pdev);
438
439         /* find the IRQs */
440
441         s3c_rtc_tickno = platform_get_irq(pdev, 1);
442         if (s3c_rtc_tickno < 0) {
443                 dev_err(&pdev->dev, "no irq for rtc tick\n");
444                 return -ENOENT;
445         }
446
447         s3c_rtc_alarmno = platform_get_irq(pdev, 0);
448         if (s3c_rtc_alarmno < 0) {
449                 dev_err(&pdev->dev, "no irq for alarm\n");
450                 return -ENOENT;
451         }
452
453         pr_debug("s3c2410_rtc: tick irq %d, alarm irq %d\n",
454                  s3c_rtc_tickno, s3c_rtc_alarmno);
455
456         /* get the memory region */
457
458         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
459         if (res == NULL) {
460                 dev_err(&pdev->dev, "failed to get memory region resource\n");
461                 return -ENOENT;
462         }
463
464         s3c_rtc_mem = request_mem_region(res->start, resource_size(res),
465                                          pdev->name);
466
467         if (s3c_rtc_mem == NULL) {
468                 dev_err(&pdev->dev, "failed to reserve memory region\n");
469                 ret = -ENOENT;
470                 goto err_nores;
471         }
472
473         s3c_rtc_base = ioremap(res->start, resource_size(res));
474         if (s3c_rtc_base == NULL) {
475                 dev_err(&pdev->dev, "failed ioremap()\n");
476                 ret = -EINVAL;
477                 goto err_nomap;
478         }
479
480         rtc_clk = clk_get(&pdev->dev, "rtc");
481         if (IS_ERR(rtc_clk)) {
482                 dev_err(&pdev->dev, "failed to find rtc clock source\n");
483                 ret = PTR_ERR(rtc_clk);
484                 rtc_clk = NULL;
485                 goto err_clk;
486         }
487
488         clk_enable(rtc_clk);
489
490         /* check to see if everything is setup correctly */
491
492         s3c_rtc_enable(pdev, 1);
493
494         pr_debug("s3c2410_rtc: RTCCON=%02x\n",
495                  readw(s3c_rtc_base + S3C2410_RTCCON));
496
497         device_init_wakeup(&pdev->dev, 1);
498
499         /* register RTC and exit */
500
501         rtc = rtc_device_register("s3c", &pdev->dev, &s3c_rtcops,
502                                   THIS_MODULE);
503
504         if (IS_ERR(rtc)) {
505                 dev_err(&pdev->dev, "cannot attach rtc\n");
506                 ret = PTR_ERR(rtc);
507                 goto err_nortc;
508         }
509
510         s3c_rtc_cpu_type = platform_get_device_id(pdev)->driver_data;
511
512         /* Check RTC Time */
513
514         s3c_rtc_gettime(NULL, &rtc_tm);
515
516         if (rtc_valid_tm(&rtc_tm)) {
517                 rtc_tm.tm_year  = 100;
518                 rtc_tm.tm_mon   = 0;
519                 rtc_tm.tm_mday  = 1;
520                 rtc_tm.tm_hour  = 0;
521                 rtc_tm.tm_min   = 0;
522                 rtc_tm.tm_sec   = 0;
523
524                 s3c_rtc_settime(NULL, &rtc_tm);
525
526                 dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
527         }
528
529         if (s3c_rtc_cpu_type == TYPE_S3C64XX)
530                 rtc->max_user_freq = 32768;
531         else
532                 rtc->max_user_freq = 128;
533
534         platform_set_drvdata(pdev, rtc);
535
536         s3c_rtc_setfreq(&pdev->dev, 1);
537
538         ret = request_irq(s3c_rtc_alarmno, s3c_rtc_alarmirq,
539                           IRQF_DISABLED,  "s3c2410-rtc alarm", rtc);
540         if (ret) {
541                 dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret);
542                 goto err_alarm_irq;
543         }
544
545         ret = request_irq(s3c_rtc_tickno, s3c_rtc_tickirq,
546                           IRQF_DISABLED,  "s3c2410-rtc tick", rtc);
547         if (ret) {
548                 dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret);
549                 free_irq(s3c_rtc_alarmno, rtc);
550                 goto err_tick_irq;
551         }
552
553         clk_disable(rtc_clk);
554
555         return 0;
556
557  err_tick_irq:
558         free_irq(s3c_rtc_alarmno, rtc);
559
560  err_alarm_irq:
561         platform_set_drvdata(pdev, NULL);
562         rtc_device_unregister(rtc);
563
564  err_nortc:
565         s3c_rtc_enable(pdev, 0);
566         clk_disable(rtc_clk);
567         clk_put(rtc_clk);
568
569  err_clk:
570         iounmap(s3c_rtc_base);
571
572  err_nomap:
573         release_resource(s3c_rtc_mem);
574
575  err_nores:
576         return ret;
577 }
578
579 #ifdef CONFIG_PM
580
581 /* RTC Power management control */
582
583 static int ticnt_save, ticnt_en_save;
584
585 static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
586 {
587         clk_enable(rtc_clk);
588         /* save TICNT for anyone using periodic interrupts */
589         ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT);
590         if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
591                 ticnt_en_save = readw(s3c_rtc_base + S3C2410_RTCCON);
592                 ticnt_en_save &= S3C64XX_RTCCON_TICEN;
593         }
594         s3c_rtc_enable(pdev, 0);
595
596         if (device_may_wakeup(&pdev->dev) && !wake_en) {
597                 if (enable_irq_wake(s3c_rtc_alarmno) == 0)
598                         wake_en = true;
599                 else
600                         dev_err(&pdev->dev, "enable_irq_wake failed\n");
601         }
602         clk_disable(rtc_clk);
603
604         return 0;
605 }
606
607 static int s3c_rtc_resume(struct platform_device *pdev)
608 {
609         unsigned int tmp;
610
611         clk_enable(rtc_clk);
612         s3c_rtc_enable(pdev, 1);
613         writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT);
614         if (s3c_rtc_cpu_type == TYPE_S3C64XX && ticnt_en_save) {
615                 tmp = readw(s3c_rtc_base + S3C2410_RTCCON);
616                 writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON);
617         }
618
619         if (device_may_wakeup(&pdev->dev) && wake_en) {
620                 disable_irq_wake(s3c_rtc_alarmno);
621                 wake_en = false;
622         }
623         clk_disable(rtc_clk);
624
625         return 0;
626 }
627 #else
628 #define s3c_rtc_suspend NULL
629 #define s3c_rtc_resume  NULL
630 #endif
631
632 static struct platform_device_id s3c_rtc_driver_ids[] = {
633         {
634                 .name           = "s3c2410-rtc",
635                 .driver_data    = TYPE_S3C2410,
636         }, {
637                 .name           = "s3c64xx-rtc",
638                 .driver_data    = TYPE_S3C64XX,
639         },
640         { }
641 };
642
643 MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids);
644
645 static struct platform_driver s3c_rtc_driver = {
646         .probe          = s3c_rtc_probe,
647         .remove         = __devexit_p(s3c_rtc_remove),
648         .suspend        = s3c_rtc_suspend,
649         .resume         = s3c_rtc_resume,
650         .id_table       = s3c_rtc_driver_ids,
651         .driver         = {
652                 .name   = "s3c-rtc",
653                 .owner  = THIS_MODULE,
654         },
655 };
656
657 static char __initdata banner[] = "S3C24XX RTC, (c) 2004,2006 Simtec Electronics\n";
658
659 static int __init s3c_rtc_init(void)
660 {
661         printk(banner);
662         return platform_driver_register(&s3c_rtc_driver);
663 }
664
665 static void __exit s3c_rtc_exit(void)
666 {
667         platform_driver_unregister(&s3c_rtc_driver);
668 }
669
670 module_init(s3c_rtc_init);
671 module_exit(s3c_rtc_exit);
672
673 MODULE_DESCRIPTION("Samsung S3C RTC Driver");
674 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
675 MODULE_LICENSE("GPL");
676 MODULE_ALIAS("platform:s3c2410-rtc");