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Merge tag 'for-linus-20190706' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / rtc / rtc-fm3130.c
blob1caa21b82c7d1fdfcf35474e90771d4c41bc07a4
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * rtc-fm3130.c - RTC driver for Ramtron FM3130 I2C chip.
4 *
5 * Copyright (C) 2008 Sergey Lapin
6 * Based on ds1307 driver by James Chapman and David Brownell
7 */
8
9 #include <linux/module.h>
10 #include <linux/i2c.h>
11 #include <linux/rtc.h>
12 #include <linux/bcd.h>
13 #include <linux/slab.h>
14
15 #define FM3130_RTC_CONTROL (0x0)
16 #define FM3130_CAL_CONTROL (0x1)
17 #define FM3130_RTC_SECONDS (0x2)
18 #define FM3130_RTC_MINUTES (0x3)
19 #define FM3130_RTC_HOURS (0x4)
20 #define FM3130_RTC_DAY (0x5)
21 #define FM3130_RTC_DATE (0x6)
22 #define FM3130_RTC_MONTHS (0x7)
23 #define FM3130_RTC_YEARS (0x8)
24
25 #define FM3130_ALARM_SECONDS (0x9)
26 #define FM3130_ALARM_MINUTES (0xa)
27 #define FM3130_ALARM_HOURS (0xb)
28 #define FM3130_ALARM_DATE (0xc)
29 #define FM3130_ALARM_MONTHS (0xd)
30 #define FM3130_ALARM_WP_CONTROL (0xe)
31
32 #define FM3130_CAL_CONTROL_BIT_nOSCEN (1 << 7) /* Osciallator enabled */
33 #define FM3130_RTC_CONTROL_BIT_LB (1 << 7) /* Low battery */
34 #define FM3130_RTC_CONTROL_BIT_AF (1 << 6) /* Alarm flag */
35 #define FM3130_RTC_CONTROL_BIT_CF (1 << 5) /* Century overflow */
36 #define FM3130_RTC_CONTROL_BIT_POR (1 << 4) /* Power on reset */
37 #define FM3130_RTC_CONTROL_BIT_AEN (1 << 3) /* Alarm enable */
38 #define FM3130_RTC_CONTROL_BIT_CAL (1 << 2) /* Calibration mode */
39 #define FM3130_RTC_CONTROL_BIT_WRITE (1 << 1) /* W=1 -> write mode W=0 normal */
40 #define FM3130_RTC_CONTROL_BIT_READ (1 << 0) /* R=1 -> read mode R=0 normal */
41
42 #define FM3130_CLOCK_REGS 7
43 #define FM3130_ALARM_REGS 5
44
45 struct fm3130 {
46 u8 reg_addr_time;
47 u8 reg_addr_alarm;
48 u8 regs[15];
49 struct i2c_msg msg[4];
50 struct i2c_client *client;
51 struct rtc_device *rtc;
52 int alarm_valid;
53 int data_valid;
54 };
55 static const struct i2c_device_id fm3130_id[] = {
56 { "fm3130", 0 },
57 { }
58 };
59 MODULE_DEVICE_TABLE(i2c, fm3130_id);
60
61 #define FM3130_MODE_NORMAL 0
62 #define FM3130_MODE_WRITE 1
63 #define FM3130_MODE_READ 2
64
65 static void fm3130_rtc_mode(struct device *dev, int mode)
66 {
67 struct fm3130 *fm3130 = dev_get_drvdata(dev);
68
69 fm3130->regs[FM3130_RTC_CONTROL] =
70 i2c_smbus_read_byte_data(fm3130->client, FM3130_RTC_CONTROL);
71 switch (mode) {
72 case FM3130_MODE_NORMAL:
73 fm3130->regs[FM3130_RTC_CONTROL] &=
74 ~(FM3130_RTC_CONTROL_BIT_WRITE |
75 FM3130_RTC_CONTROL_BIT_READ);
76 break;
77 case FM3130_MODE_WRITE:
78 fm3130->regs[FM3130_RTC_CONTROL] |= FM3130_RTC_CONTROL_BIT_WRITE;
79 break;
80 case FM3130_MODE_READ:
81 fm3130->regs[FM3130_RTC_CONTROL] |= FM3130_RTC_CONTROL_BIT_READ;
82 break;
83 default:
84 dev_dbg(dev, "invalid mode %d\n", mode);
85 break;
86 }
87
88 i2c_smbus_write_byte_data(fm3130->client,
89 FM3130_RTC_CONTROL, fm3130->regs[FM3130_RTC_CONTROL]);
90 }
91
92 static int fm3130_get_time(struct device *dev, struct rtc_time *t)
93 {
94 struct fm3130 *fm3130 = dev_get_drvdata(dev);
95 int tmp;
96
97 if (!fm3130->data_valid) {
98 /* We have invalid data in RTC, probably due
99 to battery faults or other problems. Return EIO
100 for now, it will allow us to set data later instead
101 of error during probing which disables device */
102 return -EIO;
103 }
104 fm3130_rtc_mode(dev, FM3130_MODE_READ);
105
106 /* read the RTC date and time registers all at once */
107 tmp = i2c_transfer(to_i2c_adapter(fm3130->client->dev.parent),
108 fm3130->msg, 2);
109 if (tmp != 2) {
110 dev_err(dev, "%s error %d\n", "read", tmp);
111 return -EIO;
112 }
113
114 fm3130_rtc_mode(dev, FM3130_MODE_NORMAL);
115
116 dev_dbg(dev, "%s: %15ph\n", "read", fm3130->regs);
117
118 t->tm_sec = bcd2bin(fm3130->regs[FM3130_RTC_SECONDS] & 0x7f);
119 t->tm_min = bcd2bin(fm3130->regs[FM3130_RTC_MINUTES] & 0x7f);
120 tmp = fm3130->regs[FM3130_RTC_HOURS] & 0x3f;
121 t->tm_hour = bcd2bin(tmp);
122 t->tm_wday = bcd2bin(fm3130->regs[FM3130_RTC_DAY] & 0x07) - 1;
123 t->tm_mday = bcd2bin(fm3130->regs[FM3130_RTC_DATE] & 0x3f);
124 tmp = fm3130->regs[FM3130_RTC_MONTHS] & 0x1f;
125 t->tm_mon = bcd2bin(tmp) - 1;
126
127 /* assume 20YY not 19YY, and ignore CF bit */
128 t->tm_year = bcd2bin(fm3130->regs[FM3130_RTC_YEARS]) + 100;
129
130 dev_dbg(dev, "%s secs=%d, mins=%d, "
131 "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n",
132 "read", t->tm_sec, t->tm_min,
133 t->tm_hour, t->tm_mday,
134 t->tm_mon, t->tm_year, t->tm_wday);
135
136 return 0;
137 }
138
139
140 static int fm3130_set_time(struct device *dev, struct rtc_time *t)
141 {
142 struct fm3130 *fm3130 = dev_get_drvdata(dev);
143 int tmp, i;
144 u8 *buf = fm3130->regs;
145
146 dev_dbg(dev, "%s secs=%d, mins=%d, "
147 "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n",
148 "write", t->tm_sec, t->tm_min,
149 t->tm_hour, t->tm_mday,
150 t->tm_mon, t->tm_year, t->tm_wday);
151
152 /* first register addr */
153 buf[FM3130_RTC_SECONDS] = bin2bcd(t->tm_sec);
154 buf[FM3130_RTC_MINUTES] = bin2bcd(t->tm_min);
155 buf[FM3130_RTC_HOURS] = bin2bcd(t->tm_hour);
156 buf[FM3130_RTC_DAY] = bin2bcd(t->tm_wday + 1);
157 buf[FM3130_RTC_DATE] = bin2bcd(t->tm_mday);
158 buf[FM3130_RTC_MONTHS] = bin2bcd(t->tm_mon + 1);
159
160 /* assume 20YY not 19YY */
161 tmp = t->tm_year - 100;
162 buf[FM3130_RTC_YEARS] = bin2bcd(tmp);
163
164 dev_dbg(dev, "%s: %15ph\n", "write", buf);
165
166 fm3130_rtc_mode(dev, FM3130_MODE_WRITE);
167
168 /* Writing time registers, we don't support multibyte transfers */
169 for (i = 0; i < FM3130_CLOCK_REGS; i++) {
170 i2c_smbus_write_byte_data(fm3130->client,
171 FM3130_RTC_SECONDS + i,
172 fm3130->regs[FM3130_RTC_SECONDS + i]);
173 }
174
175 fm3130_rtc_mode(dev, FM3130_MODE_NORMAL);
176
177 /* We assume here that data are valid once written */
178 if (!fm3130->data_valid)
179 fm3130->data_valid = 1;
180 return 0;
181 }
182
183 static int fm3130_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
184 {
185 struct fm3130 *fm3130 = dev_get_drvdata(dev);
186 int tmp;
187 struct rtc_time *tm = &alrm->time;
188
189 if (!fm3130->alarm_valid) {
190 /*
191 * We have invalid alarm in RTC, probably due to battery faults
192 * or other problems. Return EIO for now, it will allow us to
193 * set alarm value later instead of error during probing which
194 * disables device
195 */
196 return -EIO;
197 }
198
199 /* read the RTC alarm registers all at once */
200 tmp = i2c_transfer(to_i2c_adapter(fm3130->client->dev.parent),
201 &fm3130->msg[2], 2);
202 if (tmp != 2) {
203 dev_err(dev, "%s error %d\n", "read", tmp);
204 return -EIO;
205 }
206 dev_dbg(dev, "alarm read %02x %02x %02x %02x %02x\n",
207 fm3130->regs[FM3130_ALARM_SECONDS],
208 fm3130->regs[FM3130_ALARM_MINUTES],
209 fm3130->regs[FM3130_ALARM_HOURS],
210 fm3130->regs[FM3130_ALARM_DATE],
211 fm3130->regs[FM3130_ALARM_MONTHS]);
212
213 tm->tm_sec = bcd2bin(fm3130->regs[FM3130_ALARM_SECONDS] & 0x7F);
214 tm->tm_min = bcd2bin(fm3130->regs[FM3130_ALARM_MINUTES] & 0x7F);
215 tm->tm_hour = bcd2bin(fm3130->regs[FM3130_ALARM_HOURS] & 0x3F);
216 tm->tm_mday = bcd2bin(fm3130->regs[FM3130_ALARM_DATE] & 0x3F);
217 tm->tm_mon = bcd2bin(fm3130->regs[FM3130_ALARM_MONTHS] & 0x1F);
218
219 if (tm->tm_mon > 0)
220 tm->tm_mon -= 1; /* RTC is 1-12, tm_mon is 0-11 */
221
222 dev_dbg(dev, "%s secs=%d, mins=%d, "
223 "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n",
224 "read alarm", tm->tm_sec, tm->tm_min,
225 tm->tm_hour, tm->tm_mday,
226 tm->tm_mon, tm->tm_year, tm->tm_wday);
227
228 /* check if alarm enabled */
229 fm3130->regs[FM3130_RTC_CONTROL] =
230 i2c_smbus_read_byte_data(fm3130->client, FM3130_RTC_CONTROL);
231
232 if ((fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_AEN) &&
233 (~fm3130->regs[FM3130_RTC_CONTROL] &
234 FM3130_RTC_CONTROL_BIT_CAL)) {
235 alrm->enabled = 1;
236 }
237
238 return 0;
239 }
240
241 static int fm3130_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
242 {
243 struct fm3130 *fm3130 = dev_get_drvdata(dev);
244 struct rtc_time *tm = &alrm->time;
245 int i;
246
247 dev_dbg(dev, "%s secs=%d, mins=%d, "
248 "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n",
249 "write alarm", tm->tm_sec, tm->tm_min,
250 tm->tm_hour, tm->tm_mday,
251 tm->tm_mon, tm->tm_year, tm->tm_wday);
252
253 fm3130->regs[FM3130_ALARM_SECONDS] =
254 (tm->tm_sec != -1) ? bin2bcd(tm->tm_sec) : 0x80;
255
256 fm3130->regs[FM3130_ALARM_MINUTES] =
257 (tm->tm_min != -1) ? bin2bcd(tm->tm_min) : 0x80;
258
259 fm3130->regs[FM3130_ALARM_HOURS] =
260 (tm->tm_hour != -1) ? bin2bcd(tm->tm_hour) : 0x80;
261
262 fm3130->regs[FM3130_ALARM_DATE] =
263 (tm->tm_mday != -1) ? bin2bcd(tm->tm_mday) : 0x80;
264
265 fm3130->regs[FM3130_ALARM_MONTHS] =
266 (tm->tm_mon != -1) ? bin2bcd(tm->tm_mon + 1) : 0x80;
267
268 dev_dbg(dev, "alarm write %02x %02x %02x %02x %02x\n",
269 fm3130->regs[FM3130_ALARM_SECONDS],
270 fm3130->regs[FM3130_ALARM_MINUTES],
271 fm3130->regs[FM3130_ALARM_HOURS],
272 fm3130->regs[FM3130_ALARM_DATE],
273 fm3130->regs[FM3130_ALARM_MONTHS]);
274 /* Writing time registers, we don't support multibyte transfers */
275 for (i = 0; i < FM3130_ALARM_REGS; i++) {
276 i2c_smbus_write_byte_data(fm3130->client,
277 FM3130_ALARM_SECONDS + i,
278 fm3130->regs[FM3130_ALARM_SECONDS + i]);
279 }
280 fm3130->regs[FM3130_RTC_CONTROL] =
281 i2c_smbus_read_byte_data(fm3130->client, FM3130_RTC_CONTROL);
282
283 /* enable or disable alarm */
284 if (alrm->enabled) {
285 i2c_smbus_write_byte_data(fm3130->client, FM3130_RTC_CONTROL,
286 (fm3130->regs[FM3130_RTC_CONTROL] &
287 ~(FM3130_RTC_CONTROL_BIT_CAL)) |
288 FM3130_RTC_CONTROL_BIT_AEN);
289 } else {
290 i2c_smbus_write_byte_data(fm3130->client, FM3130_RTC_CONTROL,
291 fm3130->regs[FM3130_RTC_CONTROL] &
292 ~(FM3130_RTC_CONTROL_BIT_CAL) &
293 ~(FM3130_RTC_CONTROL_BIT_AEN));
294 }
295
296 /* We assume here that data is valid once written */
297 if (!fm3130->alarm_valid)
298 fm3130->alarm_valid = 1;
299
300 return 0;
301 }
302
303 static int fm3130_alarm_irq_enable(struct device *dev, unsigned int enabled)
304 {
305 struct fm3130 *fm3130 = dev_get_drvdata(dev);
306 int ret = 0;
307
308 fm3130->regs[FM3130_RTC_CONTROL] =
309 i2c_smbus_read_byte_data(fm3130->client, FM3130_RTC_CONTROL);
310
311 dev_dbg(dev, "alarm_irq_enable: enable=%d, FM3130_RTC_CONTROL=%02x\n",
312 enabled, fm3130->regs[FM3130_RTC_CONTROL]);
313
314 switch (enabled) {
315 case 0: /* alarm off */
316 ret = i2c_smbus_write_byte_data(fm3130->client,
317 FM3130_RTC_CONTROL, fm3130->regs[FM3130_RTC_CONTROL] &
318 ~(FM3130_RTC_CONTROL_BIT_CAL) &
319 ~(FM3130_RTC_CONTROL_BIT_AEN));
320 break;
321 case 1: /* alarm on */
322 ret = i2c_smbus_write_byte_data(fm3130->client,
323 FM3130_RTC_CONTROL, (fm3130->regs[FM3130_RTC_CONTROL] &
324 ~(FM3130_RTC_CONTROL_BIT_CAL)) |
325 FM3130_RTC_CONTROL_BIT_AEN);
326 break;
327 default:
328 ret = -EINVAL;
329 break;
330 }
331
332 return ret;
333 }
334
335 static const struct rtc_class_ops fm3130_rtc_ops = {
336 .read_time = fm3130_get_time,
337 .set_time = fm3130_set_time,
338 .read_alarm = fm3130_read_alarm,
339 .set_alarm = fm3130_set_alarm,
340 .alarm_irq_enable = fm3130_alarm_irq_enable,
341 };
342
343 static struct i2c_driver fm3130_driver;
344
345 static int fm3130_probe(struct i2c_client *client,
346 const struct i2c_device_id *id)
347 {
348 struct fm3130 *fm3130;
349 int err = -ENODEV;
350 int tmp;
351 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
352
353 if (!i2c_check_functionality(adapter,
354 I2C_FUNC_I2C | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
355 return -EIO;
356
357 fm3130 = devm_kzalloc(&client->dev, sizeof(struct fm3130), GFP_KERNEL);
358
359 if (!fm3130)
360 return -ENOMEM;
361
362 fm3130->client = client;
363 i2c_set_clientdata(client, fm3130);
364 fm3130->reg_addr_time = FM3130_RTC_SECONDS;
365 fm3130->reg_addr_alarm = FM3130_ALARM_SECONDS;
366
367 /* Messages to read time */
368 fm3130->msg[0].addr = client->addr;
369 fm3130->msg[0].flags = 0;
370 fm3130->msg[0].len = 1;
371 fm3130->msg[0].buf = &fm3130->reg_addr_time;
372
373 fm3130->msg[1].addr = client->addr;
374 fm3130->msg[1].flags = I2C_M_RD;
375 fm3130->msg[1].len = FM3130_CLOCK_REGS;
376 fm3130->msg[1].buf = &fm3130->regs[FM3130_RTC_SECONDS];
377
378 /* Messages to read alarm */
379 fm3130->msg[2].addr = client->addr;
380 fm3130->msg[2].flags = 0;
381 fm3130->msg[2].len = 1;
382 fm3130->msg[2].buf = &fm3130->reg_addr_alarm;
383
384 fm3130->msg[3].addr = client->addr;
385 fm3130->msg[3].flags = I2C_M_RD;
386 fm3130->msg[3].len = FM3130_ALARM_REGS;
387 fm3130->msg[3].buf = &fm3130->regs[FM3130_ALARM_SECONDS];
388
389 fm3130->alarm_valid = 0;
390 fm3130->data_valid = 0;
391
392 tmp = i2c_transfer(adapter, fm3130->msg, 4);
393 if (tmp != 4) {
394 dev_dbg(&client->dev, "read error %d\n", tmp);
395 err = -EIO;
396 goto exit_free;
397 }
398
399 fm3130->regs[FM3130_RTC_CONTROL] =
400 i2c_smbus_read_byte_data(client, FM3130_RTC_CONTROL);
401 fm3130->regs[FM3130_CAL_CONTROL] =
402 i2c_smbus_read_byte_data(client, FM3130_CAL_CONTROL);
403
404 /* Disabling calibration mode */
405 if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_CAL) {
406 i2c_smbus_write_byte_data(client, FM3130_RTC_CONTROL,
407 fm3130->regs[FM3130_RTC_CONTROL] &
408 ~(FM3130_RTC_CONTROL_BIT_CAL));
409 dev_warn(&client->dev, "Disabling calibration mode!\n");
410 }
411
412 /* Disabling read and write modes */
413 if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_WRITE ||
414 fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_READ) {
415 i2c_smbus_write_byte_data(client, FM3130_RTC_CONTROL,
416 fm3130->regs[FM3130_RTC_CONTROL] &
417 ~(FM3130_RTC_CONTROL_BIT_READ |
418 FM3130_RTC_CONTROL_BIT_WRITE));
419 dev_warn(&client->dev, "Disabling READ or WRITE mode!\n");
420 }
421
422 /* oscillator off? turn it on, so clock can tick. */
423 if (fm3130->regs[FM3130_CAL_CONTROL] & FM3130_CAL_CONTROL_BIT_nOSCEN)
424 i2c_smbus_write_byte_data(client, FM3130_CAL_CONTROL,
425 fm3130->regs[FM3130_CAL_CONTROL] &
426 ~(FM3130_CAL_CONTROL_BIT_nOSCEN));
427
428 /* low battery? clear flag, and warn */
429 if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_LB) {
430 i2c_smbus_write_byte_data(client, FM3130_RTC_CONTROL,
431 fm3130->regs[FM3130_RTC_CONTROL] &
432 ~(FM3130_RTC_CONTROL_BIT_LB));
433 dev_warn(&client->dev, "Low battery!\n");
434 }
435
436 /* check if Power On Reset bit is set */
437 if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_POR) {
438 i2c_smbus_write_byte_data(client, FM3130_RTC_CONTROL,
439 fm3130->regs[FM3130_RTC_CONTROL] &
440 ~FM3130_RTC_CONTROL_BIT_POR);
441 dev_dbg(&client->dev, "POR bit is set\n");
442 }
443 /* ACS is controlled by alarm */
444 i2c_smbus_write_byte_data(client, FM3130_ALARM_WP_CONTROL, 0x80);
445
446 /* alarm registers sanity check */
447 tmp = bcd2bin(fm3130->regs[FM3130_RTC_SECONDS] & 0x7f);
448 if (tmp > 59)
449 goto bad_alarm;
450
451 tmp = bcd2bin(fm3130->regs[FM3130_RTC_MINUTES] & 0x7f);
452 if (tmp > 59)
453 goto bad_alarm;
454
455 tmp = bcd2bin(fm3130->regs[FM3130_RTC_HOURS] & 0x3f);
456 if (tmp > 23)
457 goto bad_alarm;
458
459 tmp = bcd2bin(fm3130->regs[FM3130_RTC_DATE] & 0x3f);
460 if (tmp == 0 || tmp > 31)
461 goto bad_alarm;
462
463 tmp = bcd2bin(fm3130->regs[FM3130_RTC_MONTHS] & 0x1f);
464 if (tmp == 0 || tmp > 12)
465 goto bad_alarm;
466
467 fm3130->alarm_valid = 1;
468
469 bad_alarm:
470
471 /* clock registers sanity chek */
472 tmp = bcd2bin(fm3130->regs[FM3130_RTC_SECONDS] & 0x7f);
473 if (tmp > 59)
474 goto bad_clock;
475
476 tmp = bcd2bin(fm3130->regs[FM3130_RTC_MINUTES] & 0x7f);
477 if (tmp > 59)
478 goto bad_clock;
479
480 tmp = bcd2bin(fm3130->regs[FM3130_RTC_HOURS] & 0x3f);
481 if (tmp > 23)
482 goto bad_clock;
483
484 tmp = bcd2bin(fm3130->regs[FM3130_RTC_DAY] & 0x7);
485 if (tmp == 0 || tmp > 7)
486 goto bad_clock;
487
488 tmp = bcd2bin(fm3130->regs[FM3130_RTC_DATE] & 0x3f);
489 if (tmp == 0 || tmp > 31)
490 goto bad_clock;
491
492 tmp = bcd2bin(fm3130->regs[FM3130_RTC_MONTHS] & 0x1f);
493 if (tmp == 0 || tmp > 12)
494 goto bad_clock;
495
496 fm3130->data_valid = 1;
497
498 bad_clock:
499
500 if (!fm3130->data_valid || !fm3130->alarm_valid)
501 dev_dbg(&client->dev, "%s: %15ph\n", "bogus registers",
502 fm3130->regs);
503
504 /* We won't bail out here because we just got invalid data.
505 Time setting from u-boot doesn't work anyway */
506 fm3130->rtc = devm_rtc_device_register(&client->dev, client->name,
507 &fm3130_rtc_ops, THIS_MODULE);
508 if (IS_ERR(fm3130->rtc)) {
509 err = PTR_ERR(fm3130->rtc);
510 dev_err(&client->dev,
511 "unable to register the class device\n");
512 goto exit_free;
513 }
514 return 0;
515 exit_free:
516 return err;
517 }
518
519 static struct i2c_driver fm3130_driver = {
520 .driver = {
521 .name = "rtc-fm3130",
522 },
523 .probe = fm3130_probe,
524 .id_table = fm3130_id,
525 };
526
527 module_i2c_driver(fm3130_driver);
528
529 MODULE_DESCRIPTION("RTC driver for FM3130");
530 MODULE_AUTHOR("Sergey Lapin <slapin@ossfans.org>");
531 MODULE_LICENSE("GPL");
532
Linux with added FPC-III support