Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6
[pandora-kernel.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 enum s3c_cpu_type s3c_rtc_cpu_type;
50
51 static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
52
53 /* IRQ Handlers */
54
55 static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
56 {
57         struct rtc_device *rdev = id;
58
59         rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF);
60
61         if (s3c_rtc_cpu_type == TYPE_S3C64XX)
62                 writeb(S3C2410_INTP_ALM, s3c_rtc_base + S3C2410_INTP);
63
64         return IRQ_HANDLED;
65 }
66
67 static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
68 {
69         struct rtc_device *rdev = id;
70
71         rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF);
72
73         if (s3c_rtc_cpu_type == TYPE_S3C64XX)
74                 writeb(S3C2410_INTP_TIC, s3c_rtc_base + S3C2410_INTP);
75
76         return IRQ_HANDLED;
77 }
78
79 /* Update control registers */
80 static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
81 {
82         unsigned int tmp;
83
84         pr_debug("%s: aie=%d\n", __func__, enabled);
85
86         tmp = readb(s3c_rtc_base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
87
88         if (enabled)
89                 tmp |= S3C2410_RTCALM_ALMEN;
90
91         writeb(tmp, s3c_rtc_base + S3C2410_RTCALM);
92
93         return 0;
94 }
95
96 static int s3c_rtc_setfreq(struct device *dev, int freq)
97 {
98         struct platform_device *pdev = to_platform_device(dev);
99         struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
100         unsigned int tmp = 0;
101
102         if (!is_power_of_2(freq))
103                 return -EINVAL;
104
105         spin_lock_irq(&s3c_rtc_pie_lock);
106
107         if (s3c_rtc_cpu_type == TYPE_S3C2410) {
108                 tmp = readb(s3c_rtc_base + S3C2410_TICNT);
109                 tmp &= S3C2410_TICNT_ENABLE;
110         }
111
112         tmp |= (rtc_dev->max_user_freq / freq)-1;
113
114         writel(tmp, s3c_rtc_base + S3C2410_TICNT);
115         spin_unlock_irq(&s3c_rtc_pie_lock);
116
117         return 0;
118 }
119
120 /* Time read/write */
121
122 static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
123 {
124         unsigned int have_retried = 0;
125         void __iomem *base = s3c_rtc_base;
126
127  retry_get_time:
128         rtc_tm->tm_min  = readb(base + S3C2410_RTCMIN);
129         rtc_tm->tm_hour = readb(base + S3C2410_RTCHOUR);
130         rtc_tm->tm_mday = readb(base + S3C2410_RTCDATE);
131         rtc_tm->tm_mon  = readb(base + S3C2410_RTCMON);
132         rtc_tm->tm_year = readb(base + S3C2410_RTCYEAR);
133         rtc_tm->tm_sec  = readb(base + S3C2410_RTCSEC);
134
135         /* the only way to work out wether the system was mid-update
136          * when we read it is to check the second counter, and if it
137          * is zero, then we re-try the entire read
138          */
139
140         if (rtc_tm->tm_sec == 0 && !have_retried) {
141                 have_retried = 1;
142                 goto retry_get_time;
143         }
144
145         pr_debug("read time %04d.%02d.%02d %02d:%02d:%02d\n",
146                  1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
147                  rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
148
149         rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
150         rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
151         rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
152         rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
153         rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
154         rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
155
156         rtc_tm->tm_year += 100;
157         rtc_tm->tm_mon -= 1;
158
159         return rtc_valid_tm(rtc_tm);
160 }
161
162 static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
163 {
164         void __iomem *base = s3c_rtc_base;
165         int year = tm->tm_year - 100;
166
167         pr_debug("set time %04d.%02d.%02d %02d:%02d:%02d\n",
168                  1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
169                  tm->tm_hour, tm->tm_min, tm->tm_sec);
170
171         /* we get around y2k by simply not supporting it */
172
173         if (year < 0 || year >= 100) {
174                 dev_err(dev, "rtc only supports 100 years\n");
175                 return -EINVAL;
176         }
177
178         writeb(bin2bcd(tm->tm_sec),  base + S3C2410_RTCSEC);
179         writeb(bin2bcd(tm->tm_min),  base + S3C2410_RTCMIN);
180         writeb(bin2bcd(tm->tm_hour), base + S3C2410_RTCHOUR);
181         writeb(bin2bcd(tm->tm_mday), base + S3C2410_RTCDATE);
182         writeb(bin2bcd(tm->tm_mon + 1), base + S3C2410_RTCMON);
183         writeb(bin2bcd(year), base + S3C2410_RTCYEAR);
184
185         return 0;
186 }
187
188 static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
189 {
190         struct rtc_time *alm_tm = &alrm->time;
191         void __iomem *base = s3c_rtc_base;
192         unsigned int alm_en;
193
194         alm_tm->tm_sec  = readb(base + S3C2410_ALMSEC);
195         alm_tm->tm_min  = readb(base + S3C2410_ALMMIN);
196         alm_tm->tm_hour = readb(base + S3C2410_ALMHOUR);
197         alm_tm->tm_mon  = readb(base + S3C2410_ALMMON);
198         alm_tm->tm_mday = readb(base + S3C2410_ALMDATE);
199         alm_tm->tm_year = readb(base + S3C2410_ALMYEAR);
200
201         alm_en = readb(base + S3C2410_RTCALM);
202
203         alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
204
205         pr_debug("read alarm %d, %04d.%02d.%02d %02d:%02d:%02d\n",
206                  alm_en,
207                  1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
208                  alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec);
209
210
211         /* decode the alarm enable field */
212
213         if (alm_en & S3C2410_RTCALM_SECEN)
214                 alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
215         else
216                 alm_tm->tm_sec = -1;
217
218         if (alm_en & S3C2410_RTCALM_MINEN)
219                 alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
220         else
221                 alm_tm->tm_min = -1;
222
223         if (alm_en & S3C2410_RTCALM_HOUREN)
224                 alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
225         else
226                 alm_tm->tm_hour = -1;
227
228         if (alm_en & S3C2410_RTCALM_DAYEN)
229                 alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);
230         else
231                 alm_tm->tm_mday = -1;
232
233         if (alm_en & S3C2410_RTCALM_MONEN) {
234                 alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
235                 alm_tm->tm_mon -= 1;
236         } else {
237                 alm_tm->tm_mon = -1;
238         }
239
240         if (alm_en & S3C2410_RTCALM_YEAREN)
241                 alm_tm->tm_year = bcd2bin(alm_tm->tm_year);
242         else
243                 alm_tm->tm_year = -1;
244
245         return 0;
246 }
247
248 static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
249 {
250         struct rtc_time *tm = &alrm->time;
251         void __iomem *base = s3c_rtc_base;
252         unsigned int alrm_en;
253
254         pr_debug("s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
255                  alrm->enabled,
256                  1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
257                  tm->tm_hour, tm->tm_min, tm->tm_sec);
258
259
260         alrm_en = readb(base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
261         writeb(0x00, base + S3C2410_RTCALM);
262
263         if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
264                 alrm_en |= S3C2410_RTCALM_SECEN;
265                 writeb(bin2bcd(tm->tm_sec), base + S3C2410_ALMSEC);
266         }
267
268         if (tm->tm_min < 60 && tm->tm_min >= 0) {
269                 alrm_en |= S3C2410_RTCALM_MINEN;
270                 writeb(bin2bcd(tm->tm_min), base + S3C2410_ALMMIN);
271         }
272
273         if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
274                 alrm_en |= S3C2410_RTCALM_HOUREN;
275                 writeb(bin2bcd(tm->tm_hour), base + S3C2410_ALMHOUR);
276         }
277
278         pr_debug("setting S3C2410_RTCALM to %08x\n", alrm_en);
279
280         writeb(alrm_en, base + S3C2410_RTCALM);
281
282         s3c_rtc_setaie(dev, alrm->enabled);
283
284         return 0;
285 }
286
287 static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
288 {
289         unsigned int ticnt;
290
291         if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
292                 ticnt = readw(s3c_rtc_base + S3C2410_RTCCON);
293                 ticnt &= S3C64XX_RTCCON_TICEN;
294         } else {
295                 ticnt = readb(s3c_rtc_base + S3C2410_TICNT);
296                 ticnt &= S3C2410_TICNT_ENABLE;
297         }
298
299         seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt  ? "yes" : "no");
300         return 0;
301 }
302
303 static int s3c_rtc_open(struct device *dev)
304 {
305         struct platform_device *pdev = to_platform_device(dev);
306         struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
307         int ret;
308
309         ret = request_irq(s3c_rtc_alarmno, s3c_rtc_alarmirq,
310                           IRQF_DISABLED,  "s3c2410-rtc alarm", rtc_dev);
311
312         if (ret) {
313                 dev_err(dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret);
314                 return ret;
315         }
316
317         ret = request_irq(s3c_rtc_tickno, s3c_rtc_tickirq,
318                           IRQF_DISABLED,  "s3c2410-rtc tick", rtc_dev);
319
320         if (ret) {
321                 dev_err(dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret);
322                 goto tick_err;
323         }
324
325         return ret;
326
327  tick_err:
328         free_irq(s3c_rtc_alarmno, rtc_dev);
329         return ret;
330 }
331
332 static void s3c_rtc_release(struct device *dev)
333 {
334         struct platform_device *pdev = to_platform_device(dev);
335         struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
336
337         /* do not clear AIE here, it may be needed for wake */
338
339         free_irq(s3c_rtc_alarmno, rtc_dev);
340         free_irq(s3c_rtc_tickno, rtc_dev);
341 }
342
343 static const struct rtc_class_ops s3c_rtcops = {
344         .open           = s3c_rtc_open,
345         .release        = s3c_rtc_release,
346         .read_time      = s3c_rtc_gettime,
347         .set_time       = s3c_rtc_settime,
348         .read_alarm     = s3c_rtc_getalarm,
349         .set_alarm      = s3c_rtc_setalarm,
350         .proc           = s3c_rtc_proc,
351         .alarm_irq_enable = s3c_rtc_setaie,
352 };
353
354 static void s3c_rtc_enable(struct platform_device *pdev, int en)
355 {
356         void __iomem *base = s3c_rtc_base;
357         unsigned int tmp;
358
359         if (s3c_rtc_base == NULL)
360                 return;
361
362         if (!en) {
363                 tmp = readw(base + S3C2410_RTCCON);
364                 if (s3c_rtc_cpu_type == TYPE_S3C64XX)
365                         tmp &= ~S3C64XX_RTCCON_TICEN;
366                 tmp &= ~S3C2410_RTCCON_RTCEN;
367                 writew(tmp, base + S3C2410_RTCCON);
368
369                 if (s3c_rtc_cpu_type == TYPE_S3C2410) {
370                         tmp = readb(base + S3C2410_TICNT);
371                         tmp &= ~S3C2410_TICNT_ENABLE;
372                         writeb(tmp, base + S3C2410_TICNT);
373                 }
374         } else {
375                 /* re-enable the device, and check it is ok */
376
377                 if ((readw(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0) {
378                         dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
379
380                         tmp = readw(base + S3C2410_RTCCON);
381                         writew(tmp | S3C2410_RTCCON_RTCEN,
382                                 base + S3C2410_RTCCON);
383                 }
384
385                 if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)) {
386                         dev_info(&pdev->dev, "removing RTCCON_CNTSEL\n");
387
388                         tmp = readw(base + S3C2410_RTCCON);
389                         writew(tmp & ~S3C2410_RTCCON_CNTSEL,
390                                 base + S3C2410_RTCCON);
391                 }
392
393                 if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)) {
394                         dev_info(&pdev->dev, "removing RTCCON_CLKRST\n");
395
396                         tmp = readw(base + S3C2410_RTCCON);
397                         writew(tmp & ~S3C2410_RTCCON_CLKRST,
398                                 base + S3C2410_RTCCON);
399                 }
400         }
401 }
402
403 static int __devexit s3c_rtc_remove(struct platform_device *dev)
404 {
405         struct rtc_device *rtc = platform_get_drvdata(dev);
406
407         platform_set_drvdata(dev, NULL);
408         rtc_device_unregister(rtc);
409
410         s3c_rtc_setaie(&dev->dev, 0);
411
412         clk_disable(rtc_clk);
413         clk_put(rtc_clk);
414         rtc_clk = NULL;
415
416         iounmap(s3c_rtc_base);
417         release_resource(s3c_rtc_mem);
418         kfree(s3c_rtc_mem);
419
420         return 0;
421 }
422
423 static int __devinit s3c_rtc_probe(struct platform_device *pdev)
424 {
425         struct rtc_device *rtc;
426         struct rtc_time rtc_tm;
427         struct resource *res;
428         int ret;
429
430         pr_debug("%s: probe=%p\n", __func__, pdev);
431
432         /* find the IRQs */
433
434         s3c_rtc_tickno = platform_get_irq(pdev, 1);
435         if (s3c_rtc_tickno < 0) {
436                 dev_err(&pdev->dev, "no irq for rtc tick\n");
437                 return -ENOENT;
438         }
439
440         s3c_rtc_alarmno = platform_get_irq(pdev, 0);
441         if (s3c_rtc_alarmno < 0) {
442                 dev_err(&pdev->dev, "no irq for alarm\n");
443                 return -ENOENT;
444         }
445
446         pr_debug("s3c2410_rtc: tick irq %d, alarm irq %d\n",
447                  s3c_rtc_tickno, s3c_rtc_alarmno);
448
449         /* get the memory region */
450
451         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
452         if (res == NULL) {
453                 dev_err(&pdev->dev, "failed to get memory region resource\n");
454                 return -ENOENT;
455         }
456
457         s3c_rtc_mem = request_mem_region(res->start,
458                                          res->end-res->start+1,
459                                          pdev->name);
460
461         if (s3c_rtc_mem == NULL) {
462                 dev_err(&pdev->dev, "failed to reserve memory region\n");
463                 ret = -ENOENT;
464                 goto err_nores;
465         }
466
467         s3c_rtc_base = ioremap(res->start, res->end - res->start + 1);
468         if (s3c_rtc_base == NULL) {
469                 dev_err(&pdev->dev, "failed ioremap()\n");
470                 ret = -EINVAL;
471                 goto err_nomap;
472         }
473
474         rtc_clk = clk_get(&pdev->dev, "rtc");
475         if (IS_ERR(rtc_clk)) {
476                 dev_err(&pdev->dev, "failed to find rtc clock source\n");
477                 ret = PTR_ERR(rtc_clk);
478                 rtc_clk = NULL;
479                 goto err_clk;
480         }
481
482         clk_enable(rtc_clk);
483
484         /* check to see if everything is setup correctly */
485
486         s3c_rtc_enable(pdev, 1);
487
488         pr_debug("s3c2410_rtc: RTCCON=%02x\n",
489                  readw(s3c_rtc_base + S3C2410_RTCCON));
490
491         device_init_wakeup(&pdev->dev, 1);
492
493         /* register RTC and exit */
494
495         rtc = rtc_device_register("s3c", &pdev->dev, &s3c_rtcops,
496                                   THIS_MODULE);
497
498         if (IS_ERR(rtc)) {
499                 dev_err(&pdev->dev, "cannot attach rtc\n");
500                 ret = PTR_ERR(rtc);
501                 goto err_nortc;
502         }
503
504         s3c_rtc_cpu_type = platform_get_device_id(pdev)->driver_data;
505
506         /* Check RTC Time */
507
508         s3c_rtc_gettime(NULL, &rtc_tm);
509
510         if (rtc_valid_tm(&rtc_tm)) {
511                 rtc_tm.tm_year  = 100;
512                 rtc_tm.tm_mon   = 0;
513                 rtc_tm.tm_mday  = 1;
514                 rtc_tm.tm_hour  = 0;
515                 rtc_tm.tm_min   = 0;
516                 rtc_tm.tm_sec   = 0;
517
518                 s3c_rtc_settime(NULL, &rtc_tm);
519
520                 dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
521         }
522
523         if (s3c_rtc_cpu_type == TYPE_S3C64XX)
524                 rtc->max_user_freq = 32768;
525         else
526                 rtc->max_user_freq = 128;
527
528         platform_set_drvdata(pdev, rtc);
529
530         s3c_rtc_setfreq(&pdev->dev, 1);
531
532         return 0;
533
534  err_nortc:
535         s3c_rtc_enable(pdev, 0);
536         clk_disable(rtc_clk);
537         clk_put(rtc_clk);
538
539  err_clk:
540         iounmap(s3c_rtc_base);
541
542  err_nomap:
543         release_resource(s3c_rtc_mem);
544
545  err_nores:
546         return ret;
547 }
548
549 #ifdef CONFIG_PM
550
551 /* RTC Power management control */
552
553 static int ticnt_save, ticnt_en_save;
554
555 static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
556 {
557         /* save TICNT for anyone using periodic interrupts */
558         ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT);
559         if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
560                 ticnt_en_save = readw(s3c_rtc_base + S3C2410_RTCCON);
561                 ticnt_en_save &= S3C64XX_RTCCON_TICEN;
562         }
563         s3c_rtc_enable(pdev, 0);
564
565         if (device_may_wakeup(&pdev->dev))
566                 enable_irq_wake(s3c_rtc_alarmno);
567
568         return 0;
569 }
570
571 static int s3c_rtc_resume(struct platform_device *pdev)
572 {
573         unsigned int tmp;
574
575         s3c_rtc_enable(pdev, 1);
576         writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT);
577         if (s3c_rtc_cpu_type == TYPE_S3C64XX && ticnt_en_save) {
578                 tmp = readw(s3c_rtc_base + S3C2410_RTCCON);
579                 writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON);
580         }
581
582         if (device_may_wakeup(&pdev->dev))
583                 disable_irq_wake(s3c_rtc_alarmno);
584
585         return 0;
586 }
587 #else
588 #define s3c_rtc_suspend NULL
589 #define s3c_rtc_resume  NULL
590 #endif
591
592 static struct platform_device_id s3c_rtc_driver_ids[] = {
593         {
594                 .name           = "s3c2410-rtc",
595                 .driver_data    = TYPE_S3C2410,
596         }, {
597                 .name           = "s3c64xx-rtc",
598                 .driver_data    = TYPE_S3C64XX,
599         },
600         { }
601 };
602
603 MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids);
604
605 static struct platform_driver s3c_rtc_driver = {
606         .probe          = s3c_rtc_probe,
607         .remove         = __devexit_p(s3c_rtc_remove),
608         .suspend        = s3c_rtc_suspend,
609         .resume         = s3c_rtc_resume,
610         .id_table       = s3c_rtc_driver_ids,
611         .driver         = {
612                 .name   = "s3c-rtc",
613                 .owner  = THIS_MODULE,
614         },
615 };
616
617 static char __initdata banner[] = "S3C24XX RTC, (c) 2004,2006 Simtec Electronics\n";
618
619 static int __init s3c_rtc_init(void)
620 {
621         printk(banner);
622         return platform_driver_register(&s3c_rtc_driver);
623 }
624
625 static void __exit s3c_rtc_exit(void)
626 {
627         platform_driver_unregister(&s3c_rtc_driver);
628 }
629
630 module_init(s3c_rtc_init);
631 module_exit(s3c_rtc_exit);
632
633 MODULE_DESCRIPTION("Samsung S3C RTC Driver");
634 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
635 MODULE_LICENSE("GPL");
636 MODULE_ALIAS("platform:s3c2410-rtc");