1/* rtc-ds1343.c
2 *
3 * Driver for Dallas Semiconductor DS1343 Low Current, SPI Compatible
4 * Real Time Clock
5 *
6 * Author : Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>
7 *	    Ankur Srivastava <sankurece@gmail.com> : DS1343 Nvram Support
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 */
14
15#include <linux/init.h>
16#include <linux/module.h>
17#include <linux/interrupt.h>
18#include <linux/device.h>
19#include <linux/spi/spi.h>
20#include <linux/regmap.h>
21#include <linux/rtc.h>
22#include <linux/bcd.h>
23#include <linux/pm.h>
24#include <linux/slab.h>
25
26#define DS1343_DRV_VERSION	"01.00"
27#define DALLAS_MAXIM_DS1343	0
28#define DALLAS_MAXIM_DS1344	1
29
30/* RTC DS1343 Registers */
31#define DS1343_SECONDS_REG	0x00
32#define DS1343_MINUTES_REG	0x01
33#define DS1343_HOURS_REG	0x02
34#define DS1343_DAY_REG		0x03
35#define DS1343_DATE_REG		0x04
36#define DS1343_MONTH_REG	0x05
37#define DS1343_YEAR_REG		0x06
38#define DS1343_ALM0_SEC_REG	0x07
39#define DS1343_ALM0_MIN_REG	0x08
40#define DS1343_ALM0_HOUR_REG	0x09
41#define DS1343_ALM0_DAY_REG	0x0A
42#define DS1343_ALM1_SEC_REG	0x0B
43#define DS1343_ALM1_MIN_REG	0x0C
44#define DS1343_ALM1_HOUR_REG	0x0D
45#define DS1343_ALM1_DAY_REG	0x0E
46#define DS1343_CONTROL_REG	0x0F
47#define DS1343_STATUS_REG	0x10
48#define DS1343_TRICKLE_REG	0x11
49#define DS1343_NVRAM		0x20
50
51#define DS1343_NVRAM_LEN	96
52
53/* DS1343 Control Registers bits */
54#define DS1343_EOSC		0x80
55#define DS1343_DOSF		0x20
56#define DS1343_EGFIL		0x10
57#define DS1343_SQW		0x08
58#define DS1343_INTCN		0x04
59#define DS1343_A1IE		0x02
60#define DS1343_A0IE		0x01
61
62/* DS1343 Status Registers bits */
63#define DS1343_OSF		0x80
64#define DS1343_IRQF1		0x02
65#define DS1343_IRQF0		0x01
66
67/* DS1343 Trickle Charger Registers bits */
68#define DS1343_TRICKLE_MAGIC	0xa0
69#define DS1343_TRICKLE_DS1	0x08
70#define DS1343_TRICKLE_1K	0x01
71#define DS1343_TRICKLE_2K	0x02
72#define DS1343_TRICKLE_4K	0x03
73
74static const struct spi_device_id ds1343_id[] = {
75	{ "ds1343", DALLAS_MAXIM_DS1343 },
76	{ "ds1344", DALLAS_MAXIM_DS1344 },
77	{ }
78};
79MODULE_DEVICE_TABLE(spi, ds1343_id);
80
81struct ds1343_priv {
82	struct spi_device *spi;
83	struct rtc_device *rtc;
84	struct regmap *map;
85	struct mutex mutex;
86	unsigned int irqen;
87	int irq;
88	int alarm_sec;
89	int alarm_min;
90	int alarm_hour;
91	int alarm_mday;
92};
93
94static int ds1343_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
95{
96	switch (cmd) {
97#ifdef RTC_SET_CHARGE
98	case RTC_SET_CHARGE:
99	{
100		int val;
101
102		if (copy_from_user(&val, (int __user *)arg, sizeof(int)))
103			return -EFAULT;
104
105		return regmap_write(priv->map, DS1343_TRICKLE_REG, val);
106	}
107	break;
108#endif
109	}
110
111	return -ENOIOCTLCMD;
112}
113
114static ssize_t ds1343_show_glitchfilter(struct device *dev,
115				struct device_attribute *attr, char *buf)
116{
117	struct ds1343_priv *priv = dev_get_drvdata(dev);
118	int glitch_filt_status, data;
119
120	regmap_read(priv->map, DS1343_CONTROL_REG, &data);
121
122	glitch_filt_status = !!(data & DS1343_EGFIL);
123
124	if (glitch_filt_status)
125		return sprintf(buf, "enabled\n");
126	else
127		return sprintf(buf, "disabled\n");
128}
129
130static ssize_t ds1343_store_glitchfilter(struct device *dev,
131					struct device_attribute *attr,
132					const char *buf, size_t count)
133{
134	struct ds1343_priv *priv = dev_get_drvdata(dev);
135	int data;
136
137	regmap_read(priv->map, DS1343_CONTROL_REG, &data);
138
139	if (strncmp(buf, "enabled", 7) == 0)
140		data |= DS1343_EGFIL;
141
142	else if (strncmp(buf, "disabled", 8) == 0)
143		data &= ~(DS1343_EGFIL);
144
145	else
146		return -EINVAL;
147
148	regmap_write(priv->map, DS1343_CONTROL_REG, data);
149
150	return count;
151}
152
153static DEVICE_ATTR(glitch_filter, S_IRUGO | S_IWUSR, ds1343_show_glitchfilter,
154			ds1343_store_glitchfilter);
155
156static ssize_t ds1343_nvram_write(struct file *filp, struct kobject *kobj,
157			struct bin_attribute *attr,
158			char *buf, loff_t off, size_t count)
159{
160	int ret;
161	unsigned char address;
162	struct device *dev = kobj_to_dev(kobj);
163	struct ds1343_priv *priv = dev_get_drvdata(dev);
164
165	if (unlikely(!count))
166		return count;
167
168	if ((count + off) > DS1343_NVRAM_LEN)
169		count = DS1343_NVRAM_LEN - off;
170
171	address = DS1343_NVRAM + off;
172
173	ret = regmap_bulk_write(priv->map, address, buf, count);
174	if (ret < 0)
175		dev_err(&priv->spi->dev, "Error in nvram write %d", ret);
176
177	return (ret < 0) ? ret : count;
178}
179
180
181static ssize_t ds1343_nvram_read(struct file *filp, struct kobject *kobj,
182				struct bin_attribute *attr,
183				char *buf, loff_t off, size_t count)
184{
185	int ret;
186	unsigned char address;
187	struct device *dev = kobj_to_dev(kobj);
188	struct ds1343_priv *priv = dev_get_drvdata(dev);
189
190	if (unlikely(!count))
191		return count;
192
193	if ((count + off) > DS1343_NVRAM_LEN)
194		count = DS1343_NVRAM_LEN - off;
195
196	address = DS1343_NVRAM + off;
197
198	ret = regmap_bulk_read(priv->map, address, buf, count);
199	if (ret < 0)
200		dev_err(&priv->spi->dev, "Error in nvram read %d\n", ret);
201
202	return (ret < 0) ? ret : count;
203}
204
205
206static struct bin_attribute nvram_attr = {
207	.attr.name	= "nvram",
208	.attr.mode	= S_IRUGO | S_IWUSR,
209	.read		= ds1343_nvram_read,
210	.write		= ds1343_nvram_write,
211	.size		= DS1343_NVRAM_LEN,
212};
213
214static ssize_t ds1343_show_alarmstatus(struct device *dev,
215				struct device_attribute *attr, char *buf)
216{
217	struct ds1343_priv *priv = dev_get_drvdata(dev);
218	int alarmstatus, data;
219
220	regmap_read(priv->map, DS1343_CONTROL_REG, &data);
221
222	alarmstatus = !!(data & DS1343_A0IE);
223
224	if (alarmstatus)
225		return sprintf(buf, "enabled\n");
226	else
227		return sprintf(buf, "disabled\n");
228}
229
230static DEVICE_ATTR(alarm_status, S_IRUGO, ds1343_show_alarmstatus, NULL);
231
232static ssize_t ds1343_show_alarmmode(struct device *dev,
233				struct device_attribute *attr, char *buf)
234{
235	struct ds1343_priv *priv = dev_get_drvdata(dev);
236	int alarm_mode, data;
237	char *alarm_str;
238
239	regmap_read(priv->map, DS1343_ALM0_SEC_REG, &data);
240	alarm_mode = (data & 0x80) >> 4;
241
242	regmap_read(priv->map, DS1343_ALM0_MIN_REG, &data);
243	alarm_mode |= (data & 0x80) >> 5;
244
245	regmap_read(priv->map, DS1343_ALM0_HOUR_REG, &data);
246	alarm_mode |= (data & 0x80) >> 6;
247
248	regmap_read(priv->map, DS1343_ALM0_DAY_REG, &data);
249	alarm_mode |= (data & 0x80) >> 7;
250
251	switch (alarm_mode) {
252	case 15:
253		alarm_str = "each second";
254		break;
255
256	case 7:
257		alarm_str = "seconds match";
258		break;
259
260	case 3:
261		alarm_str = "minutes and seconds match";
262		break;
263
264	case 1:
265		alarm_str = "hours, minutes and seconds match";
266		break;
267
268	case 0:
269		alarm_str = "day, hours, minutes and seconds match";
270		break;
271
272	default:
273		alarm_str = "invalid";
274		break;
275	}
276
277	return sprintf(buf, "%s\n", alarm_str);
278}
279
280static DEVICE_ATTR(alarm_mode, S_IRUGO, ds1343_show_alarmmode, NULL);
281
282static ssize_t ds1343_show_tricklecharger(struct device *dev,
283				struct device_attribute *attr, char *buf)
284{
285	struct ds1343_priv *priv = dev_get_drvdata(dev);
286	int data;
287	char *diodes = "disabled", *resistors = " ";
288
289	regmap_read(priv->map, DS1343_TRICKLE_REG, &data);
290
291	if ((data & 0xf0) == DS1343_TRICKLE_MAGIC) {
292		switch (data & 0x0c) {
293		case DS1343_TRICKLE_DS1:
294			diodes = "one diode,";
295			break;
296
297		default:
298			diodes = "no diode,";
299			break;
300		}
301
302		switch (data & 0x03) {
303		case DS1343_TRICKLE_1K:
304			resistors = "1k Ohm";
305			break;
306
307		case DS1343_TRICKLE_2K:
308			resistors = "2k Ohm";
309			break;
310
311		case DS1343_TRICKLE_4K:
312			resistors = "4k Ohm";
313			break;
314
315		default:
316			diodes = "disabled";
317			break;
318		}
319	}
320
321	return sprintf(buf, "%s %s\n", diodes, resistors);
322}
323
324static DEVICE_ATTR(trickle_charger, S_IRUGO, ds1343_show_tricklecharger, NULL);
325
326static int ds1343_sysfs_register(struct device *dev)
327{
328	struct ds1343_priv *priv = dev_get_drvdata(dev);
329	int err;
330
331	err = device_create_file(dev, &dev_attr_glitch_filter);
332	if (err)
333		return err;
334
335	err = device_create_file(dev, &dev_attr_trickle_charger);
336	if (err)
337		goto error1;
338
339	err = device_create_bin_file(dev, &nvram_attr);
340	if (err)
341		goto error2;
342
343	if (priv->irq <= 0)
344		return err;
345
346	err = device_create_file(dev, &dev_attr_alarm_mode);
347	if (err)
348		goto error3;
349
350	err = device_create_file(dev, &dev_attr_alarm_status);
351	if (!err)
352		return err;
353
354	device_remove_file(dev, &dev_attr_alarm_mode);
355
356error3:
357	device_remove_bin_file(dev, &nvram_attr);
358
359error2:
360	device_remove_file(dev, &dev_attr_trickle_charger);
361
362error1:
363	device_remove_file(dev, &dev_attr_glitch_filter);
364
365	return err;
366}
367
368static void ds1343_sysfs_unregister(struct device *dev)
369{
370	struct ds1343_priv *priv = dev_get_drvdata(dev);
371
372	device_remove_file(dev, &dev_attr_glitch_filter);
373	device_remove_file(dev, &dev_attr_trickle_charger);
374	device_remove_bin_file(dev, &nvram_attr);
375
376	if (priv->irq <= 0)
377		return;
378
379	device_remove_file(dev, &dev_attr_alarm_status);
380	device_remove_file(dev, &dev_attr_alarm_mode);
381}
382
383static int ds1343_read_time(struct device *dev, struct rtc_time *dt)
384{
385	struct ds1343_priv *priv = dev_get_drvdata(dev);
386	unsigned char buf[7];
387	int res;
388
389	res = regmap_bulk_read(priv->map, DS1343_SECONDS_REG, buf, 7);
390	if (res)
391		return res;
392
393	dt->tm_sec	= bcd2bin(buf[0]);
394	dt->tm_min	= bcd2bin(buf[1]);
395	dt->tm_hour	= bcd2bin(buf[2] & 0x3F);
396	dt->tm_wday	= bcd2bin(buf[3]) - 1;
397	dt->tm_mday	= bcd2bin(buf[4]);
398	dt->tm_mon	= bcd2bin(buf[5] & 0x1F) - 1;
399	dt->tm_year	= bcd2bin(buf[6]) + 100; /* year offset from 1900 */
400
401	return rtc_valid_tm(dt);
402}
403
404static int ds1343_set_time(struct device *dev, struct rtc_time *dt)
405{
406	struct ds1343_priv *priv = dev_get_drvdata(dev);
407	int res;
408
409	res = regmap_write(priv->map, DS1343_SECONDS_REG,
410				bin2bcd(dt->tm_sec));
411	if (res)
412		return res;
413
414	res = regmap_write(priv->map, DS1343_MINUTES_REG,
415				bin2bcd(dt->tm_min));
416	if (res)
417		return res;
418
419	res = regmap_write(priv->map, DS1343_HOURS_REG,
420				bin2bcd(dt->tm_hour) & 0x3F);
421	if (res)
422		return res;
423
424	res = regmap_write(priv->map, DS1343_DAY_REG,
425				bin2bcd(dt->tm_wday + 1));
426	if (res)
427		return res;
428
429	res = regmap_write(priv->map, DS1343_DATE_REG,
430				bin2bcd(dt->tm_mday));
431	if (res)
432		return res;
433
434	res = regmap_write(priv->map, DS1343_MONTH_REG,
435				bin2bcd(dt->tm_mon + 1));
436	if (res)
437		return res;
438
439	dt->tm_year %= 100;
440
441	res = regmap_write(priv->map, DS1343_YEAR_REG,
442				bin2bcd(dt->tm_year));
443	if (res)
444		return res;
445
446	return 0;
447}
448
449static int ds1343_update_alarm(struct device *dev)
450{
451	struct ds1343_priv *priv = dev_get_drvdata(dev);
452	unsigned int control, stat;
453	unsigned char buf[4];
454	int res = 0;
455
456	res = regmap_read(priv->map, DS1343_CONTROL_REG, &control);
457	if (res)
458		return res;
459
460	res = regmap_read(priv->map, DS1343_STATUS_REG, &stat);
461	if (res)
462		return res;
463
464	control &= ~(DS1343_A0IE);
465	stat &= ~(DS1343_IRQF0);
466
467	res = regmap_write(priv->map, DS1343_CONTROL_REG, control);
468	if (res)
469		return res;
470
471	res = regmap_write(priv->map, DS1343_STATUS_REG, stat);
472	if (res)
473		return res;
474
475	buf[0] = priv->alarm_sec < 0 || (priv->irqen & RTC_UF) ?
476		0x80 : bin2bcd(priv->alarm_sec) & 0x7F;
477	buf[1] = priv->alarm_min < 0 || (priv->irqen & RTC_UF) ?
478		0x80 : bin2bcd(priv->alarm_min) & 0x7F;
479	buf[2] = priv->alarm_hour < 0 || (priv->irqen & RTC_UF) ?
480		0x80 : bin2bcd(priv->alarm_hour) & 0x3F;
481	buf[3] = priv->alarm_mday < 0 || (priv->irqen & RTC_UF) ?
482		0x80 : bin2bcd(priv->alarm_mday) & 0x7F;
483
484	res = regmap_bulk_write(priv->map, DS1343_ALM0_SEC_REG, buf, 4);
485	if (res)
486		return res;
487
488	if (priv->irqen) {
489		control |= DS1343_A0IE;
490		res = regmap_write(priv->map, DS1343_CONTROL_REG, control);
491	}
492
493	return res;
494}
495
496static int ds1343_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
497{
498	struct ds1343_priv *priv = dev_get_drvdata(dev);
499	int res = 0;
500	unsigned int stat;
501
502	if (priv->irq <= 0)
503		return -EINVAL;
504
505	mutex_lock(&priv->mutex);
506
507	res = regmap_read(priv->map, DS1343_STATUS_REG, &stat);
508	if (res)
509		goto out;
510
511	alarm->enabled = !!(priv->irqen & RTC_AF);
512	alarm->pending = !!(stat & DS1343_IRQF0);
513
514	alarm->time.tm_sec = priv->alarm_sec < 0 ? 0 : priv->alarm_sec;
515	alarm->time.tm_min = priv->alarm_min < 0 ? 0 : priv->alarm_min;
516	alarm->time.tm_hour = priv->alarm_hour < 0 ? 0 : priv->alarm_hour;
517	alarm->time.tm_mday = priv->alarm_mday < 0 ? 0 : priv->alarm_mday;
518
519	alarm->time.tm_mon = -1;
520	alarm->time.tm_year = -1;
521	alarm->time.tm_wday = -1;
522	alarm->time.tm_yday = -1;
523	alarm->time.tm_isdst = -1;
524
525out:
526	mutex_unlock(&priv->mutex);
527	return res;
528}
529
530static int ds1343_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
531{
532	struct ds1343_priv *priv = dev_get_drvdata(dev);
533	int res = 0;
534
535	if (priv->irq <= 0)
536		return -EINVAL;
537
538	mutex_lock(&priv->mutex);
539
540	priv->alarm_sec = alarm->time.tm_sec;
541	priv->alarm_min = alarm->time.tm_min;
542	priv->alarm_hour = alarm->time.tm_hour;
543	priv->alarm_mday = alarm->time.tm_mday;
544
545	if (alarm->enabled)
546		priv->irqen |= RTC_AF;
547
548	res = ds1343_update_alarm(dev);
549
550	mutex_unlock(&priv->mutex);
551
552	return res;
553}
554
555static int ds1343_alarm_irq_enable(struct device *dev, unsigned int enabled)
556{
557	struct ds1343_priv *priv = dev_get_drvdata(dev);
558	int res = 0;
559
560	if (priv->irq <= 0)
561		return -EINVAL;
562
563	mutex_lock(&priv->mutex);
564
565	if (enabled)
566		priv->irqen |= RTC_AF;
567	else
568		priv->irqen &= ~RTC_AF;
569
570	res = ds1343_update_alarm(dev);
571
572	mutex_unlock(&priv->mutex);
573
574	return res;
575}
576
577static irqreturn_t ds1343_thread(int irq, void *dev_id)
578{
579	struct ds1343_priv *priv = dev_id;
580	unsigned int stat, control;
581	int res = 0;
582
583	mutex_lock(&priv->mutex);
584
585	res = regmap_read(priv->map, DS1343_STATUS_REG, &stat);
586	if (res)
587		goto out;
588
589	if (stat & DS1343_IRQF0) {
590		stat &= ~DS1343_IRQF0;
591		regmap_write(priv->map, DS1343_STATUS_REG, stat);
592
593		res = regmap_read(priv->map, DS1343_CONTROL_REG, &control);
594		if (res)
595			goto out;
596
597		control &= ~DS1343_A0IE;
598		regmap_write(priv->map, DS1343_CONTROL_REG, control);
599
600		rtc_update_irq(priv->rtc, 1, RTC_AF | RTC_IRQF);
601	}
602
603out:
604	mutex_unlock(&priv->mutex);
605	return IRQ_HANDLED;
606}
607
608static const struct rtc_class_ops ds1343_rtc_ops = {
609	.ioctl		= ds1343_ioctl,
610	.read_time	= ds1343_read_time,
611	.set_time	= ds1343_set_time,
612	.read_alarm	= ds1343_read_alarm,
613	.set_alarm	= ds1343_set_alarm,
614	.alarm_irq_enable = ds1343_alarm_irq_enable,
615};
616
617static int ds1343_probe(struct spi_device *spi)
618{
619	struct ds1343_priv *priv;
620	struct regmap_config config;
621	unsigned int data;
622	int res;
623
624	memset(&config, 0, sizeof(config));
625	config.reg_bits = 8;
626	config.val_bits = 8;
627	config.write_flag_mask = 0x80;
628
629	priv = devm_kzalloc(&spi->dev, sizeof(struct ds1343_priv), GFP_KERNEL);
630	if (!priv)
631		return -ENOMEM;
632
633	priv->spi = spi;
634	mutex_init(&priv->mutex);
635
636	/* RTC DS1347 works in spi mode 3 and
637	 * its chip select is active high
638	 */
639	spi->mode = SPI_MODE_3 | SPI_CS_HIGH;
640	spi->bits_per_word = 8;
641	res = spi_setup(spi);
642	if (res)
643		return res;
644
645	spi_set_drvdata(spi, priv);
646
647	priv->map = devm_regmap_init_spi(spi, &config);
648
649	if (IS_ERR(priv->map)) {
650		dev_err(&spi->dev, "spi regmap init failed for rtc ds1343\n");
651		return PTR_ERR(priv->map);
652	}
653
654	res = regmap_read(priv->map, DS1343_SECONDS_REG, &data);
655	if (res)
656		return res;
657
658	regmap_read(priv->map, DS1343_CONTROL_REG, &data);
659	data |= DS1343_INTCN;
660	data &= ~(DS1343_EOSC | DS1343_A1IE | DS1343_A0IE);
661	regmap_write(priv->map, DS1343_CONTROL_REG, data);
662
663	regmap_read(priv->map, DS1343_STATUS_REG, &data);
664	data &= ~(DS1343_OSF | DS1343_IRQF1 | DS1343_IRQF0);
665	regmap_write(priv->map, DS1343_STATUS_REG, data);
666
667	priv->rtc = devm_rtc_device_register(&spi->dev, "ds1343",
668					&ds1343_rtc_ops, THIS_MODULE);
669	if (IS_ERR(priv->rtc)) {
670		dev_err(&spi->dev, "unable to register rtc ds1343\n");
671		return PTR_ERR(priv->rtc);
672	}
673
674	priv->irq = spi->irq;
675
676	if (priv->irq >= 0) {
677		res = devm_request_threaded_irq(&spi->dev, spi->irq, NULL,
678						ds1343_thread,
679						IRQF_NO_SUSPEND | IRQF_ONESHOT,
680						"ds1343", priv);
681		if (res) {
682			priv->irq = -1;
683			dev_err(&spi->dev,
684				"unable to request irq for rtc ds1343\n");
685		} else {
686			device_set_wakeup_capable(&spi->dev, 1);
687		}
688	}
689
690	res = ds1343_sysfs_register(&spi->dev);
691	if (res)
692		dev_err(&spi->dev,
693			"unable to create sysfs entries for rtc ds1343\n");
694
695	return 0;
696}
697
698static int ds1343_remove(struct spi_device *spi)
699{
700	struct ds1343_priv *priv = spi_get_drvdata(spi);
701
702	if (spi->irq) {
703		mutex_lock(&priv->mutex);
704		priv->irqen &= ~RTC_AF;
705		mutex_unlock(&priv->mutex);
706
707		devm_free_irq(&spi->dev, spi->irq, priv);
708	}
709
710	spi_set_drvdata(spi, NULL);
711
712	ds1343_sysfs_unregister(&spi->dev);
713
714	return 0;
715}
716
717#ifdef CONFIG_PM_SLEEP
718
719static int ds1343_suspend(struct device *dev)
720{
721	struct spi_device *spi = to_spi_device(dev);
722
723	if (spi->irq >= 0 && device_may_wakeup(dev))
724		enable_irq_wake(spi->irq);
725
726	return 0;
727}
728
729static int ds1343_resume(struct device *dev)
730{
731	struct spi_device *spi = to_spi_device(dev);
732
733	if (spi->irq >= 0 && device_may_wakeup(dev))
734		disable_irq_wake(spi->irq);
735
736	return 0;
737}
738
739#endif
740
741static SIMPLE_DEV_PM_OPS(ds1343_pm, ds1343_suspend, ds1343_resume);
742
743static struct spi_driver ds1343_driver = {
744	.driver = {
745		.name = "ds1343",
746		.owner = THIS_MODULE,
747		.pm = &ds1343_pm,
748	},
749	.probe = ds1343_probe,
750	.remove = ds1343_remove,
751	.id_table = ds1343_id,
752};
753
754module_spi_driver(ds1343_driver);
755
756MODULE_DESCRIPTION("DS1343 RTC SPI Driver");
757MODULE_AUTHOR("Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>,"
758		"Ankur Srivastava <sankurece@gmail.com>");
759MODULE_LICENSE("GPL v2");
760MODULE_VERSION(DS1343_DRV_VERSION);
761