watchdog: nowayout is bool
[linux-2.6.git] / drivers / rtc / rtc-rx8025.c
1 /*
2  * Driver for Epson's RTC module RX-8025 SA/NB
3  *
4  * Copyright (C) 2009 Wolfgang Grandegger <wg@grandegger.com>
5  *
6  * Copyright (C) 2005 by Digi International Inc.
7  * All rights reserved.
8  *
9  * Modified by fengjh at rising.com.cn
10  * <http://lists.lm-sensors.org/mailman/listinfo/lm-sensors>
11  * 2006.11
12  *
13  * Code cleanup by Sergei Poselenov, <sposelenov@emcraft.com>
14  * Converted to new style by Wolfgang Grandegger <wg@grandegger.com>
15  * Alarm and periodic interrupt added by Dmitry Rakhchev <rda@emcraft.com>
16  *
17  * This program is free software; you can redistribute it and/or
18  * modify it under the terms of the GNU General Public License
19  * version 2 as published by the Free Software Foundation.
20  */
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/slab.h>
24 #include <linux/init.h>
25 #include <linux/bcd.h>
26 #include <linux/i2c.h>
27 #include <linux/list.h>
28 #include <linux/rtc.h>
29
30 /* Register definitions */
31 #define RX8025_REG_SEC          0x00
32 #define RX8025_REG_MIN          0x01
33 #define RX8025_REG_HOUR         0x02
34 #define RX8025_REG_WDAY         0x03
35 #define RX8025_REG_MDAY         0x04
36 #define RX8025_REG_MONTH        0x05
37 #define RX8025_REG_YEAR         0x06
38 #define RX8025_REG_DIGOFF       0x07
39 #define RX8025_REG_ALWMIN       0x08
40 #define RX8025_REG_ALWHOUR      0x09
41 #define RX8025_REG_ALWWDAY      0x0a
42 #define RX8025_REG_ALDMIN       0x0b
43 #define RX8025_REG_ALDHOUR      0x0c
44 /* 0x0d is reserved */
45 #define RX8025_REG_CTRL1        0x0e
46 #define RX8025_REG_CTRL2        0x0f
47
48 #define RX8025_BIT_CTRL1_CT     (7 << 0)
49 /* 1 Hz periodic level irq */
50 #define RX8025_BIT_CTRL1_CT_1HZ 4
51 #define RX8025_BIT_CTRL1_TEST   (1 << 3)
52 #define RX8025_BIT_CTRL1_1224   (1 << 5)
53 #define RX8025_BIT_CTRL1_DALE   (1 << 6)
54 #define RX8025_BIT_CTRL1_WALE   (1 << 7)
55
56 #define RX8025_BIT_CTRL2_DAFG   (1 << 0)
57 #define RX8025_BIT_CTRL2_WAFG   (1 << 1)
58 #define RX8025_BIT_CTRL2_CTFG   (1 << 2)
59 #define RX8025_BIT_CTRL2_PON    (1 << 4)
60 #define RX8025_BIT_CTRL2_XST    (1 << 5)
61 #define RX8025_BIT_CTRL2_VDET   (1 << 6)
62
63 /* Clock precision adjustment */
64 #define RX8025_ADJ_RESOLUTION   3050 /* in ppb */
65 #define RX8025_ADJ_DATA_MAX     62
66 #define RX8025_ADJ_DATA_MIN     -62
67
68 static const struct i2c_device_id rx8025_id[] = {
69         { "rx8025", 0 },
70         { }
71 };
72 MODULE_DEVICE_TABLE(i2c, rx8025_id);
73
74 struct rx8025_data {
75         struct i2c_client *client;
76         struct rtc_device *rtc;
77         struct work_struct work;
78         u8 ctrl1;
79         unsigned exiting:1;
80 };
81
82 static int rx8025_read_reg(struct i2c_client *client, int number, u8 *value)
83 {
84         int ret = i2c_smbus_read_byte_data(client, (number << 4) | 0x08);
85
86         if (ret < 0) {
87                 dev_err(&client->dev, "Unable to read register #%d\n", number);
88                 return ret;
89         }
90
91         *value = ret;
92         return 0;
93 }
94
95 static int rx8025_read_regs(struct i2c_client *client,
96                             int number, u8 length, u8 *values)
97 {
98         int ret = i2c_smbus_read_i2c_block_data(client, (number << 4) | 0x08,
99                                                 length, values);
100
101         if (ret != length) {
102                 dev_err(&client->dev, "Unable to read registers #%d..#%d\n",
103                         number, number + length - 1);
104                 return ret < 0 ? ret : -EIO;
105         }
106
107         return 0;
108 }
109
110 static int rx8025_write_reg(struct i2c_client *client, int number, u8 value)
111 {
112         int ret = i2c_smbus_write_byte_data(client, number << 4, value);
113
114         if (ret)
115                 dev_err(&client->dev, "Unable to write register #%d\n",
116                         number);
117
118         return ret;
119 }
120
121 static int rx8025_write_regs(struct i2c_client *client,
122                              int number, u8 length, u8 *values)
123 {
124         int ret = i2c_smbus_write_i2c_block_data(client, (number << 4) | 0x08,
125                                                  length, values);
126
127         if (ret)
128                 dev_err(&client->dev, "Unable to write registers #%d..#%d\n",
129                         number, number + length - 1);
130
131         return ret;
132 }
133
134 static irqreturn_t rx8025_irq(int irq, void *dev_id)
135 {
136         struct i2c_client *client = dev_id;
137         struct rx8025_data *rx8025 = i2c_get_clientdata(client);
138
139         disable_irq_nosync(irq);
140         schedule_work(&rx8025->work);
141         return IRQ_HANDLED;
142 }
143
144 static void rx8025_work(struct work_struct *work)
145 {
146         struct rx8025_data *rx8025 = container_of(work, struct rx8025_data,
147                                                   work);
148         struct i2c_client *client = rx8025->client;
149         struct mutex *lock = &rx8025->rtc->ops_lock;
150         u8 status;
151
152         mutex_lock(lock);
153
154         if (rx8025_read_reg(client, RX8025_REG_CTRL2, &status))
155                 goto out;
156
157         if (!(status & RX8025_BIT_CTRL2_XST))
158                 dev_warn(&client->dev, "Oscillation stop was detected,"
159                          "you may have to readjust the clock\n");
160
161         if (status & RX8025_BIT_CTRL2_CTFG) {
162                 /* periodic */
163                 status &= ~RX8025_BIT_CTRL2_CTFG;
164                 local_irq_disable();
165                 rtc_update_irq(rx8025->rtc, 1, RTC_PF | RTC_IRQF);
166                 local_irq_enable();
167         }
168
169         if (status & RX8025_BIT_CTRL2_DAFG) {
170                 /* alarm */
171                 status &= RX8025_BIT_CTRL2_DAFG;
172                 if (rx8025_write_reg(client, RX8025_REG_CTRL1,
173                                      rx8025->ctrl1 & ~RX8025_BIT_CTRL1_DALE))
174                         goto out;
175                 local_irq_disable();
176                 rtc_update_irq(rx8025->rtc, 1, RTC_AF | RTC_IRQF);
177                 local_irq_enable();
178         }
179
180         /* acknowledge IRQ */
181         rx8025_write_reg(client, RX8025_REG_CTRL2,
182                          status | RX8025_BIT_CTRL2_XST);
183
184 out:
185         if (!rx8025->exiting)
186                 enable_irq(client->irq);
187
188         mutex_unlock(lock);
189 }
190
191 static int rx8025_get_time(struct device *dev, struct rtc_time *dt)
192 {
193         struct rx8025_data *rx8025 = dev_get_drvdata(dev);
194         u8 date[7];
195         int err;
196
197         err = rx8025_read_regs(rx8025->client, RX8025_REG_SEC, 7, date);
198         if (err)
199                 return err;
200
201         dev_dbg(dev, "%s: read 0x%02x 0x%02x "
202                 "0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n", __func__,
203                 date[0], date[1], date[2], date[3], date[4],
204                 date[5], date[6]);
205
206         dt->tm_sec = bcd2bin(date[RX8025_REG_SEC] & 0x7f);
207         dt->tm_min = bcd2bin(date[RX8025_REG_MIN] & 0x7f);
208         if (rx8025->ctrl1 & RX8025_BIT_CTRL1_1224)
209                 dt->tm_hour = bcd2bin(date[RX8025_REG_HOUR] & 0x3f);
210         else
211                 dt->tm_hour = bcd2bin(date[RX8025_REG_HOUR] & 0x1f) % 12
212                         + (date[RX8025_REG_HOUR] & 0x20 ? 12 : 0);
213
214         dt->tm_mday = bcd2bin(date[RX8025_REG_MDAY] & 0x3f);
215         dt->tm_mon = bcd2bin(date[RX8025_REG_MONTH] & 0x1f) - 1;
216         dt->tm_year = bcd2bin(date[RX8025_REG_YEAR]);
217
218         if (dt->tm_year < 70)
219                 dt->tm_year += 100;
220
221         dev_dbg(dev, "%s: date %ds %dm %dh %dmd %dm %dy\n", __func__,
222                 dt->tm_sec, dt->tm_min, dt->tm_hour,
223                 dt->tm_mday, dt->tm_mon, dt->tm_year);
224
225         return rtc_valid_tm(dt);
226 }
227
228 static int rx8025_set_time(struct device *dev, struct rtc_time *dt)
229 {
230         struct rx8025_data *rx8025 = dev_get_drvdata(dev);
231         u8 date[7];
232
233         /*
234          * BUG: The HW assumes every year that is a multiple of 4 to be a leap
235          * year.  Next time this is wrong is 2100, which will not be a leap
236          * year.
237          */
238
239         /*
240          * Here the read-only bits are written as "0".  I'm not sure if that
241          * is sound.
242          */
243         date[RX8025_REG_SEC] = bin2bcd(dt->tm_sec);
244         date[RX8025_REG_MIN] = bin2bcd(dt->tm_min);
245         if (rx8025->ctrl1 & RX8025_BIT_CTRL1_1224)
246                 date[RX8025_REG_HOUR] = bin2bcd(dt->tm_hour);
247         else
248                 date[RX8025_REG_HOUR] = (dt->tm_hour >= 12 ? 0x20 : 0)
249                         | bin2bcd((dt->tm_hour + 11) % 12 + 1);
250
251         date[RX8025_REG_WDAY] = bin2bcd(dt->tm_wday);
252         date[RX8025_REG_MDAY] = bin2bcd(dt->tm_mday);
253         date[RX8025_REG_MONTH] = bin2bcd(dt->tm_mon + 1);
254         date[RX8025_REG_YEAR] = bin2bcd(dt->tm_year % 100);
255
256         dev_dbg(dev,
257                 "%s: write 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n",
258                 __func__,
259                 date[0], date[1], date[2], date[3], date[4], date[5], date[6]);
260
261         return rx8025_write_regs(rx8025->client, RX8025_REG_SEC, 7, date);
262 }
263
264 static int rx8025_init_client(struct i2c_client *client, int *need_reset)
265 {
266         struct rx8025_data *rx8025 = i2c_get_clientdata(client);
267         u8 ctrl[2], ctrl2;
268         int need_clear = 0;
269         int err;
270
271         err = rx8025_read_regs(rx8025->client, RX8025_REG_CTRL1, 2, ctrl);
272         if (err)
273                 goto out;
274
275         /* Keep test bit zero ! */
276         rx8025->ctrl1 = ctrl[0] & ~RX8025_BIT_CTRL1_TEST;
277
278         if (ctrl[1] & RX8025_BIT_CTRL2_PON) {
279                 dev_warn(&client->dev, "power-on reset was detected, "
280                          "you may have to readjust the clock\n");
281                 *need_reset = 1;
282         }
283
284         if (ctrl[1] & RX8025_BIT_CTRL2_VDET) {
285                 dev_warn(&client->dev, "a power voltage drop was detected, "
286                          "you may have to readjust the clock\n");
287                 *need_reset = 1;
288         }
289
290         if (!(ctrl[1] & RX8025_BIT_CTRL2_XST)) {
291                 dev_warn(&client->dev, "Oscillation stop was detected,"
292                          "you may have to readjust the clock\n");
293                 *need_reset = 1;
294         }
295
296         if (ctrl[1] & (RX8025_BIT_CTRL2_DAFG | RX8025_BIT_CTRL2_WAFG)) {
297                 dev_warn(&client->dev, "Alarm was detected\n");
298                 need_clear = 1;
299         }
300
301         if (!(ctrl[1] & RX8025_BIT_CTRL2_CTFG))
302                 need_clear = 1;
303
304         if (*need_reset || need_clear) {
305                 ctrl2 = ctrl[0];
306                 ctrl2 &= ~(RX8025_BIT_CTRL2_PON | RX8025_BIT_CTRL2_VDET |
307                            RX8025_BIT_CTRL2_CTFG | RX8025_BIT_CTRL2_WAFG |
308                            RX8025_BIT_CTRL2_DAFG);
309                 ctrl2 |= RX8025_BIT_CTRL2_XST;
310
311                 err = rx8025_write_reg(client, RX8025_REG_CTRL2, ctrl2);
312         }
313 out:
314         return err;
315 }
316
317 /* Alarm support */
318 static int rx8025_read_alarm(struct device *dev, struct rtc_wkalrm *t)
319 {
320         struct rx8025_data *rx8025 = dev_get_drvdata(dev);
321         struct i2c_client *client = rx8025->client;
322         u8 ctrl2, ald[2];
323         int err;
324
325         if (client->irq <= 0)
326                 return -EINVAL;
327
328         err = rx8025_read_regs(client, RX8025_REG_ALDMIN, 2, ald);
329         if (err)
330                 return err;
331
332         err = rx8025_read_reg(client, RX8025_REG_CTRL2, &ctrl2);
333         if (err)
334                 return err;
335
336         dev_dbg(dev, "%s: read alarm 0x%02x 0x%02x ctrl2 %02x\n",
337                 __func__, ald[0], ald[1], ctrl2);
338
339         /* Hardware alarms precision is 1 minute! */
340         t->time.tm_sec = 0;
341         t->time.tm_min = bcd2bin(ald[0] & 0x7f);
342         if (rx8025->ctrl1 & RX8025_BIT_CTRL1_1224)
343                 t->time.tm_hour = bcd2bin(ald[1] & 0x3f);
344         else
345                 t->time.tm_hour = bcd2bin(ald[1] & 0x1f) % 12
346                         + (ald[1] & 0x20 ? 12 : 0);
347
348         t->time.tm_wday = -1;
349         t->time.tm_mday = -1;
350         t->time.tm_mon = -1;
351         t->time.tm_year = -1;
352
353         dev_dbg(dev, "%s: date: %ds %dm %dh %dmd %dm %dy\n",
354                 __func__,
355                 t->time.tm_sec, t->time.tm_min, t->time.tm_hour,
356                 t->time.tm_mday, t->time.tm_mon, t->time.tm_year);
357         t->enabled = !!(rx8025->ctrl1 & RX8025_BIT_CTRL1_DALE);
358         t->pending = (ctrl2 & RX8025_BIT_CTRL2_DAFG) && t->enabled;
359
360         return err;
361 }
362
363 static int rx8025_set_alarm(struct device *dev, struct rtc_wkalrm *t)
364 {
365         struct i2c_client *client = to_i2c_client(dev);
366         struct rx8025_data *rx8025 = dev_get_drvdata(dev);
367         u8 ald[2];
368         int err;
369
370         if (client->irq <= 0)
371                 return -EINVAL;
372
373         /* Hardware alarm precision is 1 minute! */
374         ald[0] = bin2bcd(t->time.tm_min);
375         if (rx8025->ctrl1 & RX8025_BIT_CTRL1_1224)
376                 ald[1] = bin2bcd(t->time.tm_hour);
377         else
378                 ald[1] = (t->time.tm_hour >= 12 ? 0x20 : 0)
379                         | bin2bcd((t->time.tm_hour + 11) % 12 + 1);
380
381         dev_dbg(dev, "%s: write 0x%02x 0x%02x\n", __func__, ald[0], ald[1]);
382
383         if (rx8025->ctrl1 & RX8025_BIT_CTRL1_DALE) {
384                 rx8025->ctrl1 &= ~RX8025_BIT_CTRL1_DALE;
385                 err = rx8025_write_reg(rx8025->client, RX8025_REG_CTRL1,
386                                        rx8025->ctrl1);
387                 if (err)
388                         return err;
389         }
390         err = rx8025_write_regs(rx8025->client, RX8025_REG_ALDMIN, 2, ald);
391         if (err)
392                 return err;
393
394         if (t->enabled) {
395                 rx8025->ctrl1 |= RX8025_BIT_CTRL1_DALE;
396                 err = rx8025_write_reg(rx8025->client, RX8025_REG_CTRL1,
397                                        rx8025->ctrl1);
398                 if (err)
399                         return err;
400         }
401
402         return 0;
403 }
404
405 static int rx8025_alarm_irq_enable(struct device *dev, unsigned int enabled)
406 {
407         struct rx8025_data *rx8025 = dev_get_drvdata(dev);
408         u8 ctrl1;
409         int err;
410
411         ctrl1 = rx8025->ctrl1;
412         if (enabled)
413                 ctrl1 |= RX8025_BIT_CTRL1_DALE;
414         else
415                 ctrl1 &= ~RX8025_BIT_CTRL1_DALE;
416
417         if (ctrl1 != rx8025->ctrl1) {
418                 rx8025->ctrl1 = ctrl1;
419                 err = rx8025_write_reg(rx8025->client, RX8025_REG_CTRL1,
420                                        rx8025->ctrl1);
421                 if (err)
422                         return err;
423         }
424         return 0;
425 }
426
427 static struct rtc_class_ops rx8025_rtc_ops = {
428         .read_time = rx8025_get_time,
429         .set_time = rx8025_set_time,
430         .read_alarm = rx8025_read_alarm,
431         .set_alarm = rx8025_set_alarm,
432         .alarm_irq_enable = rx8025_alarm_irq_enable,
433 };
434
435 /*
436  * Clock precision adjustment support
437  *
438  * According to the RX8025 SA/NB application manual the frequency and
439  * temperature characteristics can be approximated using the following
440  * equation:
441  *
442  *   df = a * (ut - t)**2
443  *
444  *   df: Frequency deviation in any temperature
445  *   a : Coefficient = (-35 +-5) * 10**-9
446  *   ut: Ultimate temperature in degree = +25 +-5 degree
447  *   t : Any temperature in degree
448  *
449  * Note that the clock adjustment in ppb must be entered (which is
450  * the negative value of the deviation).
451  */
452 static int rx8025_get_clock_adjust(struct device *dev, int *adj)
453 {
454         struct i2c_client *client = to_i2c_client(dev);
455         u8 digoff;
456         int err;
457
458         err = rx8025_read_reg(client, RX8025_REG_DIGOFF, &digoff);
459         if (err)
460                 return err;
461
462         *adj = digoff >= 64 ? digoff - 128 : digoff;
463         if (*adj > 0)
464                 (*adj)--;
465         *adj *= -RX8025_ADJ_RESOLUTION;
466
467         return 0;
468 }
469
470 static int rx8025_set_clock_adjust(struct device *dev, int adj)
471 {
472         struct i2c_client *client = to_i2c_client(dev);
473         u8 digoff;
474         int err;
475
476         adj /= -RX8025_ADJ_RESOLUTION;
477         if (adj > RX8025_ADJ_DATA_MAX)
478                 adj = RX8025_ADJ_DATA_MAX;
479         else if (adj < RX8025_ADJ_DATA_MIN)
480                 adj = RX8025_ADJ_DATA_MIN;
481         else if (adj > 0)
482                 adj++;
483         else if (adj < 0)
484                 adj += 128;
485         digoff = adj;
486
487         err = rx8025_write_reg(client, RX8025_REG_DIGOFF, digoff);
488         if (err)
489                 return err;
490
491         dev_dbg(dev, "%s: write 0x%02x\n", __func__, digoff);
492
493         return 0;
494 }
495
496 static ssize_t rx8025_sysfs_show_clock_adjust(struct device *dev,
497                                               struct device_attribute *attr,
498                                               char *buf)
499 {
500         int err, adj;
501
502         err = rx8025_get_clock_adjust(dev, &adj);
503         if (err)
504                 return err;
505
506         return sprintf(buf, "%d\n", adj);
507 }
508
509 static ssize_t rx8025_sysfs_store_clock_adjust(struct device *dev,
510                                                struct device_attribute *attr,
511                                                const char *buf, size_t count)
512 {
513         int adj, err;
514
515         if (sscanf(buf, "%i", &adj) != 1)
516                 return -EINVAL;
517
518         err = rx8025_set_clock_adjust(dev, adj);
519
520         return err ? err : count;
521 }
522
523 static DEVICE_ATTR(clock_adjust_ppb, S_IRUGO | S_IWUSR,
524                    rx8025_sysfs_show_clock_adjust,
525                    rx8025_sysfs_store_clock_adjust);
526
527 static int rx8025_sysfs_register(struct device *dev)
528 {
529         return device_create_file(dev, &dev_attr_clock_adjust_ppb);
530 }
531
532 static void rx8025_sysfs_unregister(struct device *dev)
533 {
534         device_remove_file(dev, &dev_attr_clock_adjust_ppb);
535 }
536
537 static int __devinit rx8025_probe(struct i2c_client *client,
538                                   const struct i2c_device_id *id)
539 {
540         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
541         struct rx8025_data *rx8025;
542         int err, need_reset = 0;
543
544         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
545                                      | I2C_FUNC_SMBUS_I2C_BLOCK)) {
546                 dev_err(&adapter->dev,
547                         "doesn't support required functionality\n");
548                 err = -EIO;
549                 goto errout;
550         }
551
552         rx8025 = kzalloc(sizeof(*rx8025), GFP_KERNEL);
553         if (!rx8025) {
554                 dev_err(&adapter->dev, "failed to alloc memory\n");
555                 err = -ENOMEM;
556                 goto errout;
557         }
558
559         rx8025->client = client;
560         i2c_set_clientdata(client, rx8025);
561         INIT_WORK(&rx8025->work, rx8025_work);
562
563         err = rx8025_init_client(client, &need_reset);
564         if (err)
565                 goto errout_free;
566
567         if (need_reset) {
568                 struct rtc_time tm;
569                 dev_info(&client->dev,
570                          "bad conditions detected, resetting date\n");
571                 rtc_time_to_tm(0, &tm); /* 1970/1/1 */
572                 rx8025_set_time(&client->dev, &tm);
573         }
574
575         rx8025->rtc = rtc_device_register(client->name, &client->dev,
576                                           &rx8025_rtc_ops, THIS_MODULE);
577         if (IS_ERR(rx8025->rtc)) {
578                 err = PTR_ERR(rx8025->rtc);
579                 dev_err(&client->dev, "unable to register the class device\n");
580                 goto errout_free;
581         }
582
583         if (client->irq > 0) {
584                 dev_info(&client->dev, "IRQ %d supplied\n", client->irq);
585                 err = request_irq(client->irq, rx8025_irq,
586                                   0, "rx8025", client);
587                 if (err) {
588                         dev_err(&client->dev, "unable to request IRQ\n");
589                         goto errout_reg;
590                 }
591         }
592
593         rx8025->rtc->irq_freq = 1;
594         rx8025->rtc->max_user_freq = 1;
595
596         err = rx8025_sysfs_register(&client->dev);
597         if (err)
598                 goto errout_irq;
599
600         return 0;
601
602 errout_irq:
603         if (client->irq > 0)
604                 free_irq(client->irq, client);
605
606 errout_reg:
607         rtc_device_unregister(rx8025->rtc);
608
609 errout_free:
610         kfree(rx8025);
611
612 errout:
613         dev_err(&adapter->dev, "probing for rx8025 failed\n");
614         return err;
615 }
616
617 static int __devexit rx8025_remove(struct i2c_client *client)
618 {
619         struct rx8025_data *rx8025 = i2c_get_clientdata(client);
620         struct mutex *lock = &rx8025->rtc->ops_lock;
621
622         if (client->irq > 0) {
623                 mutex_lock(lock);
624                 rx8025->exiting = 1;
625                 mutex_unlock(lock);
626
627                 free_irq(client->irq, client);
628                 cancel_work_sync(&rx8025->work);
629         }
630
631         rx8025_sysfs_unregister(&client->dev);
632         rtc_device_unregister(rx8025->rtc);
633         kfree(rx8025);
634         return 0;
635 }
636
637 static struct i2c_driver rx8025_driver = {
638         .driver = {
639                 .name = "rtc-rx8025",
640                 .owner = THIS_MODULE,
641         },
642         .probe          = rx8025_probe,
643         .remove         = __devexit_p(rx8025_remove),
644         .id_table       = rx8025_id,
645 };
646
647 module_i2c_driver(rx8025_driver);
648
649 MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
650 MODULE_DESCRIPTION("RX-8025 SA/NB RTC driver");
651 MODULE_LICENSE("GPL");