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1da177e4 LT |
1 | /* |
2 | * DS1286 Real Time Clock interface for Linux | |
3 | * | |
4 | * Copyright (C) 1998, 1999, 2000 Ralf Baechle | |
5 | * | |
6 | * Based on code written by Paul Gortmaker. | |
7 | * | |
8 | * This driver allows use of the real time clock (built into nearly all | |
9 | * computers) from user space. It exports the /dev/rtc interface supporting | |
10 | * various ioctl() and also the /proc/rtc pseudo-file for status | |
11 | * information. | |
12 | * | |
13 | * The ioctls can be used to set the interrupt behaviour and generation rate | |
14 | * from the RTC via IRQ 8. Then the /dev/rtc interface can be used to make | |
15 | * use of these timer interrupts, be they interval or alarm based. | |
16 | * | |
17 | * The /dev/rtc interface will block on reads until an interrupt has been | |
18 | * received. If a RTC interrupt has already happened, it will output an | |
19 | * unsigned long and then block. The output value contains the interrupt | |
20 | * status in the low byte and the number of interrupts since the last read | |
21 | * in the remaining high bytes. The /dev/rtc interface can also be used with | |
22 | * the select(2) call. | |
23 | * | |
24 | * This program is free software; you can redistribute it and/or modify it | |
25 | * under the terms of the GNU General Public License as published by the | |
26 | * Free Software Foundation; either version 2 of the License, or (at your | |
27 | * option) any later version. | |
28 | */ | |
29 | #include <linux/ds1286.h> | |
30 | #include <linux/types.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/miscdevice.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/ioport.h> | |
35 | #include <linux/fcntl.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/poll.h> | |
38 | #include <linux/rtc.h> | |
39 | #include <linux/spinlock.h> | |
40 | #include <linux/bcd.h> | |
41 | #include <linux/proc_fs.h> | |
42 | ||
43 | #include <asm/uaccess.h> | |
44 | #include <asm/system.h> | |
45 | ||
46 | #define DS1286_VERSION "1.0" | |
47 | ||
48 | /* | |
49 | * We sponge a minor off of the misc major. No need slurping | |
50 | * up another valuable major dev number for this. If you add | |
51 | * an ioctl, make sure you don't conflict with SPARC's RTC | |
52 | * ioctls. | |
53 | */ | |
54 | ||
55 | static DECLARE_WAIT_QUEUE_HEAD(ds1286_wait); | |
56 | ||
57 | static ssize_t ds1286_read(struct file *file, char *buf, | |
58 | size_t count, loff_t *ppos); | |
59 | ||
60 | static int ds1286_ioctl(struct inode *inode, struct file *file, | |
61 | unsigned int cmd, unsigned long arg); | |
62 | ||
63 | static unsigned int ds1286_poll(struct file *file, poll_table *wait); | |
64 | ||
65 | static void ds1286_get_alm_time (struct rtc_time *alm_tm); | |
66 | static void ds1286_get_time(struct rtc_time *rtc_tm); | |
67 | static int ds1286_set_time(struct rtc_time *rtc_tm); | |
68 | ||
69 | static inline unsigned char ds1286_is_updating(void); | |
70 | ||
71 | static DEFINE_SPINLOCK(ds1286_lock); | |
72 | ||
73 | static int ds1286_read_proc(char *page, char **start, off_t off, | |
74 | int count, int *eof, void *data); | |
75 | ||
76 | /* | |
77 | * Bits in rtc_status. (7 bits of room for future expansion) | |
78 | */ | |
79 | ||
80 | #define RTC_IS_OPEN 0x01 /* means /dev/rtc is in use */ | |
81 | #define RTC_TIMER_ON 0x02 /* missed irq timer active */ | |
82 | ||
83 | static unsigned char ds1286_status; /* bitmapped status byte. */ | |
84 | ||
85 | static unsigned char days_in_mo[] = { | |
86 | 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 | |
87 | }; | |
88 | ||
89 | /* | |
90 | * Now all the various file operations that we export. | |
91 | */ | |
92 | ||
93 | static ssize_t ds1286_read(struct file *file, char *buf, | |
94 | size_t count, loff_t *ppos) | |
95 | { | |
96 | return -EIO; | |
97 | } | |
98 | ||
99 | static int ds1286_ioctl(struct inode *inode, struct file *file, | |
100 | unsigned int cmd, unsigned long arg) | |
101 | { | |
102 | struct rtc_time wtime; | |
103 | ||
104 | switch (cmd) { | |
105 | case RTC_AIE_OFF: /* Mask alarm int. enab. bit */ | |
106 | { | |
107 | unsigned int flags; | |
108 | unsigned char val; | |
109 | ||
110 | if (!capable(CAP_SYS_TIME)) | |
111 | return -EACCES; | |
112 | ||
113 | spin_lock_irqsave(&ds1286_lock, flags); | |
114 | val = rtc_read(RTC_CMD); | |
115 | val |= RTC_TDM; | |
116 | rtc_write(val, RTC_CMD); | |
117 | spin_unlock_irqrestore(&ds1286_lock, flags); | |
118 | ||
119 | return 0; | |
120 | } | |
121 | case RTC_AIE_ON: /* Allow alarm interrupts. */ | |
122 | { | |
123 | unsigned int flags; | |
124 | unsigned char val; | |
125 | ||
126 | if (!capable(CAP_SYS_TIME)) | |
127 | return -EACCES; | |
128 | ||
129 | spin_lock_irqsave(&ds1286_lock, flags); | |
130 | val = rtc_read(RTC_CMD); | |
131 | val &= ~RTC_TDM; | |
132 | rtc_write(val, RTC_CMD); | |
133 | spin_unlock_irqrestore(&ds1286_lock, flags); | |
134 | ||
135 | return 0; | |
136 | } | |
137 | case RTC_WIE_OFF: /* Mask watchdog int. enab. bit */ | |
138 | { | |
139 | unsigned int flags; | |
140 | unsigned char val; | |
141 | ||
142 | if (!capable(CAP_SYS_TIME)) | |
143 | return -EACCES; | |
144 | ||
145 | spin_lock_irqsave(&ds1286_lock, flags); | |
146 | val = rtc_read(RTC_CMD); | |
147 | val |= RTC_WAM; | |
148 | rtc_write(val, RTC_CMD); | |
149 | spin_unlock_irqrestore(&ds1286_lock, flags); | |
150 | ||
151 | return 0; | |
152 | } | |
153 | case RTC_WIE_ON: /* Allow watchdog interrupts. */ | |
154 | { | |
155 | unsigned int flags; | |
156 | unsigned char val; | |
157 | ||
158 | if (!capable(CAP_SYS_TIME)) | |
159 | return -EACCES; | |
160 | ||
161 | spin_lock_irqsave(&ds1286_lock, flags); | |
162 | val = rtc_read(RTC_CMD); | |
163 | val &= ~RTC_WAM; | |
164 | rtc_write(val, RTC_CMD); | |
165 | spin_unlock_irqrestore(&ds1286_lock, flags); | |
166 | ||
167 | return 0; | |
168 | } | |
169 | case RTC_ALM_READ: /* Read the present alarm time */ | |
170 | { | |
171 | /* | |
172 | * This returns a struct rtc_time. Reading >= 0xc0 | |
173 | * means "don't care" or "match all". Only the tm_hour, | |
174 | * tm_min, and tm_sec values are filled in. | |
175 | */ | |
176 | ||
177 | memset(&wtime, 0, sizeof(wtime)); | |
178 | ds1286_get_alm_time(&wtime); | |
179 | break; | |
180 | } | |
181 | case RTC_ALM_SET: /* Store a time into the alarm */ | |
182 | { | |
183 | /* | |
184 | * This expects a struct rtc_time. Writing 0xff means | |
185 | * "don't care" or "match all". Only the tm_hour, | |
186 | * tm_min and tm_sec are used. | |
187 | */ | |
188 | unsigned char hrs, min, sec; | |
189 | struct rtc_time alm_tm; | |
190 | ||
191 | if (!capable(CAP_SYS_TIME)) | |
192 | return -EACCES; | |
193 | ||
194 | if (copy_from_user(&alm_tm, (struct rtc_time*)arg, | |
195 | sizeof(struct rtc_time))) | |
196 | return -EFAULT; | |
197 | ||
198 | hrs = alm_tm.tm_hour; | |
199 | min = alm_tm.tm_min; | |
200 | ||
201 | if (hrs >= 24) | |
202 | hrs = 0xff; | |
203 | ||
204 | if (min >= 60) | |
205 | min = 0xff; | |
206 | ||
207 | BIN_TO_BCD(sec); | |
208 | BIN_TO_BCD(min); | |
209 | BIN_TO_BCD(hrs); | |
210 | ||
211 | spin_lock(&ds1286_lock); | |
212 | rtc_write(hrs, RTC_HOURS_ALARM); | |
213 | rtc_write(min, RTC_MINUTES_ALARM); | |
214 | spin_unlock(&ds1286_lock); | |
215 | ||
216 | return 0; | |
217 | } | |
218 | case RTC_RD_TIME: /* Read the time/date from RTC */ | |
219 | { | |
220 | memset(&wtime, 0, sizeof(wtime)); | |
221 | ds1286_get_time(&wtime); | |
222 | break; | |
223 | } | |
224 | case RTC_SET_TIME: /* Set the RTC */ | |
225 | { | |
226 | struct rtc_time rtc_tm; | |
227 | ||
228 | if (!capable(CAP_SYS_TIME)) | |
229 | return -EACCES; | |
230 | ||
231 | if (copy_from_user(&rtc_tm, (struct rtc_time*)arg, | |
232 | sizeof(struct rtc_time))) | |
233 | return -EFAULT; | |
234 | ||
235 | return ds1286_set_time(&rtc_tm); | |
236 | } | |
237 | default: | |
238 | return -EINVAL; | |
239 | } | |
240 | return copy_to_user((void *)arg, &wtime, sizeof wtime) ? -EFAULT : 0; | |
241 | } | |
242 | ||
243 | /* | |
244 | * We enforce only one user at a time here with the open/close. | |
245 | * Also clear the previous interrupt data on an open, and clean | |
246 | * up things on a close. | |
247 | */ | |
248 | ||
249 | static int ds1286_open(struct inode *inode, struct file *file) | |
250 | { | |
251 | spin_lock_irq(&ds1286_lock); | |
252 | ||
253 | if (ds1286_status & RTC_IS_OPEN) | |
254 | goto out_busy; | |
255 | ||
256 | ds1286_status |= RTC_IS_OPEN; | |
257 | ||
258 | spin_unlock_irq(&ds1286_lock); | |
259 | return 0; | |
260 | ||
261 | out_busy: | |
262 | spin_lock_irq(&ds1286_lock); | |
263 | return -EBUSY; | |
264 | } | |
265 | ||
266 | static int ds1286_release(struct inode *inode, struct file *file) | |
267 | { | |
268 | ds1286_status &= ~RTC_IS_OPEN; | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
273 | static unsigned int ds1286_poll(struct file *file, poll_table *wait) | |
274 | { | |
275 | poll_wait(file, &ds1286_wait, wait); | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | /* | |
281 | * The various file operations we support. | |
282 | */ | |
283 | ||
62322d25 | 284 | static const struct file_operations ds1286_fops = { |
1da177e4 LT |
285 | .llseek = no_llseek, |
286 | .read = ds1286_read, | |
287 | .poll = ds1286_poll, | |
288 | .ioctl = ds1286_ioctl, | |
289 | .open = ds1286_open, | |
290 | .release = ds1286_release, | |
291 | }; | |
292 | ||
293 | static struct miscdevice ds1286_dev= | |
294 | { | |
295 | .minor = RTC_MINOR, | |
296 | .name = "rtc", | |
297 | .fops = &ds1286_fops, | |
298 | }; | |
299 | ||
300 | static int __init ds1286_init(void) | |
301 | { | |
302 | int err; | |
303 | ||
304 | printk(KERN_INFO "DS1286 Real Time Clock Driver v%s\n", DS1286_VERSION); | |
305 | ||
306 | err = misc_register(&ds1286_dev); | |
307 | if (err) | |
308 | goto out; | |
309 | ||
310 | if (!create_proc_read_entry("driver/rtc", 0, 0, ds1286_read_proc, NULL)) { | |
311 | err = -ENOMEM; | |
312 | ||
313 | goto out_deregister; | |
314 | } | |
315 | ||
316 | return 0; | |
317 | ||
318 | out_deregister: | |
319 | misc_deregister(&ds1286_dev); | |
320 | ||
321 | out: | |
322 | return err; | |
323 | } | |
324 | ||
325 | static void __exit ds1286_exit(void) | |
326 | { | |
327 | remove_proc_entry("driver/rtc", NULL); | |
328 | misc_deregister(&ds1286_dev); | |
329 | } | |
330 | ||
331 | static char *days[] = { | |
332 | "***", "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" | |
333 | }; | |
334 | ||
335 | /* | |
336 | * Info exported via "/proc/rtc". | |
337 | */ | |
338 | static int ds1286_proc_output(char *buf) | |
339 | { | |
340 | char *p, *s; | |
341 | struct rtc_time tm; | |
342 | unsigned char hundredth, month, cmd, amode; | |
343 | ||
344 | p = buf; | |
345 | ||
346 | ds1286_get_time(&tm); | |
347 | hundredth = rtc_read(RTC_HUNDREDTH_SECOND); | |
348 | BCD_TO_BIN(hundredth); | |
349 | ||
350 | p += sprintf(p, | |
351 | "rtc_time\t: %02d:%02d:%02d.%02d\n" | |
352 | "rtc_date\t: %04d-%02d-%02d\n", | |
353 | tm.tm_hour, tm.tm_min, tm.tm_sec, hundredth, | |
354 | tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday); | |
355 | ||
356 | /* | |
357 | * We implicitly assume 24hr mode here. Alarm values >= 0xc0 will | |
358 | * match any value for that particular field. Values that are | |
359 | * greater than a valid time, but less than 0xc0 shouldn't appear. | |
360 | */ | |
361 | ds1286_get_alm_time(&tm); | |
362 | p += sprintf(p, "alarm\t\t: %s ", days[tm.tm_wday]); | |
363 | if (tm.tm_hour <= 24) | |
364 | p += sprintf(p, "%02d:", tm.tm_hour); | |
365 | else | |
366 | p += sprintf(p, "**:"); | |
367 | ||
368 | if (tm.tm_min <= 59) | |
369 | p += sprintf(p, "%02d\n", tm.tm_min); | |
370 | else | |
371 | p += sprintf(p, "**\n"); | |
372 | ||
373 | month = rtc_read(RTC_MONTH); | |
374 | p += sprintf(p, | |
375 | "oscillator\t: %s\n" | |
376 | "square_wave\t: %s\n", | |
377 | (month & RTC_EOSC) ? "disabled" : "enabled", | |
378 | (month & RTC_ESQW) ? "disabled" : "enabled"); | |
379 | ||
380 | amode = ((rtc_read(RTC_MINUTES_ALARM) & 0x80) >> 5) | | |
381 | ((rtc_read(RTC_HOURS_ALARM) & 0x80) >> 6) | | |
382 | ((rtc_read(RTC_DAY_ALARM) & 0x80) >> 7); | |
383 | if (amode == 7) s = "each minute"; | |
384 | else if (amode == 3) s = "minutes match"; | |
385 | else if (amode == 1) s = "hours and minutes match"; | |
386 | else if (amode == 0) s = "days, hours and minutes match"; | |
387 | else s = "invalid"; | |
388 | p += sprintf(p, "alarm_mode\t: %s\n", s); | |
389 | ||
390 | cmd = rtc_read(RTC_CMD); | |
391 | p += sprintf(p, | |
392 | "alarm_enable\t: %s\n" | |
393 | "wdog_alarm\t: %s\n" | |
394 | "alarm_mask\t: %s\n" | |
395 | "wdog_alarm_mask\t: %s\n" | |
396 | "interrupt_mode\t: %s\n" | |
397 | "INTB_mode\t: %s_active\n" | |
398 | "interrupt_pins\t: %s\n", | |
399 | (cmd & RTC_TDF) ? "yes" : "no", | |
400 | (cmd & RTC_WAF) ? "yes" : "no", | |
401 | (cmd & RTC_TDM) ? "disabled" : "enabled", | |
402 | (cmd & RTC_WAM) ? "disabled" : "enabled", | |
403 | (cmd & RTC_PU_LVL) ? "pulse" : "level", | |
404 | (cmd & RTC_IBH_LO) ? "low" : "high", | |
405 | (cmd & RTC_IPSW) ? "unswapped" : "swapped"); | |
406 | ||
407 | return p - buf; | |
408 | } | |
409 | ||
410 | static int ds1286_read_proc(char *page, char **start, off_t off, | |
411 | int count, int *eof, void *data) | |
412 | { | |
413 | int len = ds1286_proc_output (page); | |
414 | if (len <= off+count) *eof = 1; | |
415 | *start = page + off; | |
416 | len -= off; | |
417 | if (len>count) | |
418 | len = count; | |
419 | if (len<0) | |
420 | len = 0; | |
421 | ||
422 | return len; | |
423 | } | |
424 | ||
425 | /* | |
426 | * Returns true if a clock update is in progress | |
427 | */ | |
428 | static inline unsigned char ds1286_is_updating(void) | |
429 | { | |
430 | return rtc_read(RTC_CMD) & RTC_TE; | |
431 | } | |
432 | ||
433 | ||
434 | static void ds1286_get_time(struct rtc_time *rtc_tm) | |
435 | { | |
436 | unsigned char save_control; | |
437 | unsigned int flags; | |
438 | unsigned long uip_watchdog = jiffies; | |
439 | ||
440 | /* | |
441 | * read RTC once any update in progress is done. The update | |
442 | * can take just over 2ms. We wait 10 to 20ms. There is no need to | |
443 | * to poll-wait (up to 1s - eeccch) for the falling edge of RTC_UIP. | |
444 | * If you need to know *exactly* when a second has started, enable | |
445 | * periodic update complete interrupts, (via ioctl) and then | |
446 | * immediately read /dev/rtc which will block until you get the IRQ. | |
447 | * Once the read clears, read the RTC time (again via ioctl). Easy. | |
448 | */ | |
449 | ||
450 | if (ds1286_is_updating() != 0) | |
451 | while (jiffies - uip_watchdog < 2*HZ/100) | |
452 | barrier(); | |
453 | ||
454 | /* | |
455 | * Only the values that we read from the RTC are set. We leave | |
456 | * tm_wday, tm_yday and tm_isdst untouched. Even though the | |
457 | * RTC has RTC_DAY_OF_WEEK, we ignore it, as it is only updated | |
458 | * by the RTC when initially set to a non-zero value. | |
459 | */ | |
460 | spin_lock_irqsave(&ds1286_lock, flags); | |
461 | save_control = rtc_read(RTC_CMD); | |
462 | rtc_write((save_control|RTC_TE), RTC_CMD); | |
463 | ||
464 | rtc_tm->tm_sec = rtc_read(RTC_SECONDS); | |
465 | rtc_tm->tm_min = rtc_read(RTC_MINUTES); | |
466 | rtc_tm->tm_hour = rtc_read(RTC_HOURS) & 0x3f; | |
467 | rtc_tm->tm_mday = rtc_read(RTC_DATE); | |
468 | rtc_tm->tm_mon = rtc_read(RTC_MONTH) & 0x1f; | |
469 | rtc_tm->tm_year = rtc_read(RTC_YEAR); | |
470 | ||
471 | rtc_write(save_control, RTC_CMD); | |
472 | spin_unlock_irqrestore(&ds1286_lock, flags); | |
473 | ||
474 | BCD_TO_BIN(rtc_tm->tm_sec); | |
475 | BCD_TO_BIN(rtc_tm->tm_min); | |
476 | BCD_TO_BIN(rtc_tm->tm_hour); | |
477 | BCD_TO_BIN(rtc_tm->tm_mday); | |
478 | BCD_TO_BIN(rtc_tm->tm_mon); | |
479 | BCD_TO_BIN(rtc_tm->tm_year); | |
480 | ||
481 | /* | |
482 | * Account for differences between how the RTC uses the values | |
483 | * and how they are defined in a struct rtc_time; | |
484 | */ | |
485 | if (rtc_tm->tm_year < 45) | |
486 | rtc_tm->tm_year += 30; | |
487 | if ((rtc_tm->tm_year += 40) < 70) | |
488 | rtc_tm->tm_year += 100; | |
489 | ||
490 | rtc_tm->tm_mon--; | |
491 | } | |
492 | ||
493 | static int ds1286_set_time(struct rtc_time *rtc_tm) | |
494 | { | |
495 | unsigned char mon, day, hrs, min, sec, leap_yr; | |
496 | unsigned char save_control; | |
497 | unsigned int yrs, flags; | |
498 | ||
499 | ||
500 | yrs = rtc_tm->tm_year + 1900; | |
501 | mon = rtc_tm->tm_mon + 1; /* tm_mon starts at zero */ | |
502 | day = rtc_tm->tm_mday; | |
503 | hrs = rtc_tm->tm_hour; | |
504 | min = rtc_tm->tm_min; | |
505 | sec = rtc_tm->tm_sec; | |
506 | ||
507 | if (yrs < 1970) | |
508 | return -EINVAL; | |
509 | ||
510 | leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400)); | |
511 | ||
512 | if ((mon > 12) || (day == 0)) | |
513 | return -EINVAL; | |
514 | ||
515 | if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr))) | |
516 | return -EINVAL; | |
517 | ||
518 | if ((hrs >= 24) || (min >= 60) || (sec >= 60)) | |
519 | return -EINVAL; | |
520 | ||
521 | if ((yrs -= 1940) > 255) /* They are unsigned */ | |
522 | return -EINVAL; | |
523 | ||
524 | if (yrs >= 100) | |
525 | yrs -= 100; | |
526 | ||
527 | BIN_TO_BCD(sec); | |
528 | BIN_TO_BCD(min); | |
529 | BIN_TO_BCD(hrs); | |
530 | BIN_TO_BCD(day); | |
531 | BIN_TO_BCD(mon); | |
532 | BIN_TO_BCD(yrs); | |
533 | ||
534 | spin_lock_irqsave(&ds1286_lock, flags); | |
535 | save_control = rtc_read(RTC_CMD); | |
536 | rtc_write((save_control|RTC_TE), RTC_CMD); | |
537 | ||
538 | rtc_write(yrs, RTC_YEAR); | |
539 | rtc_write(mon, RTC_MONTH); | |
540 | rtc_write(day, RTC_DATE); | |
541 | rtc_write(hrs, RTC_HOURS); | |
542 | rtc_write(min, RTC_MINUTES); | |
543 | rtc_write(sec, RTC_SECONDS); | |
544 | rtc_write(0, RTC_HUNDREDTH_SECOND); | |
545 | ||
546 | rtc_write(save_control, RTC_CMD); | |
547 | spin_unlock_irqrestore(&ds1286_lock, flags); | |
548 | ||
549 | return 0; | |
550 | } | |
551 | ||
552 | static void ds1286_get_alm_time(struct rtc_time *alm_tm) | |
553 | { | |
554 | unsigned char cmd; | |
555 | unsigned int flags; | |
556 | ||
557 | /* | |
558 | * Only the values that we read from the RTC are set. That | |
559 | * means only tm_wday, tm_hour, tm_min. | |
560 | */ | |
561 | spin_lock_irqsave(&ds1286_lock, flags); | |
562 | alm_tm->tm_min = rtc_read(RTC_MINUTES_ALARM) & 0x7f; | |
563 | alm_tm->tm_hour = rtc_read(RTC_HOURS_ALARM) & 0x1f; | |
564 | alm_tm->tm_wday = rtc_read(RTC_DAY_ALARM) & 0x07; | |
565 | cmd = rtc_read(RTC_CMD); | |
566 | spin_unlock_irqrestore(&ds1286_lock, flags); | |
567 | ||
568 | BCD_TO_BIN(alm_tm->tm_min); | |
569 | BCD_TO_BIN(alm_tm->tm_hour); | |
570 | alm_tm->tm_sec = 0; | |
571 | } | |
572 | ||
573 | module_init(ds1286_init); | |
574 | module_exit(ds1286_exit); | |
575 | ||
576 | MODULE_AUTHOR("Ralf Baechle"); | |
577 | MODULE_LICENSE("GPL"); | |
578 | MODULE_ALIAS_MISCDEV(RTC_MINOR); |