xref: /openbmc/linux/drivers/rtc/rtc-s3c.c (revision 48144c28)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /* drivers/rtc/rtc-s3c.c
3  *
4  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
5  *		http://www.samsung.com/
6  *
7  * Copyright (c) 2004,2006 Simtec Electronics
8  *	Ben Dooks, <ben@simtec.co.uk>
9  *	http://armlinux.simtec.co.uk/
10  *
11  * S3C2410/S3C2440/S3C24XX Internal RTC Driver
12 */
13 
14 #include <linux/module.h>
15 #include <linux/fs.h>
16 #include <linux/string.h>
17 #include <linux/init.h>
18 #include <linux/platform_device.h>
19 #include <linux/interrupt.h>
20 #include <linux/rtc.h>
21 #include <linux/bcd.h>
22 #include <linux/clk.h>
23 #include <linux/log2.h>
24 #include <linux/slab.h>
25 #include <linux/of.h>
26 #include <linux/uaccess.h>
27 #include <linux/io.h>
28 
29 #include <asm/irq.h>
30 #include "rtc-s3c.h"
31 
32 struct s3c_rtc {
33 	struct device *dev;
34 	struct rtc_device *rtc;
35 
36 	void __iomem *base;
37 	struct clk *rtc_clk;
38 	struct clk *rtc_src_clk;
39 	bool alarm_enabled;
40 
41 	const struct s3c_rtc_data *data;
42 
43 	int irq_alarm;
44 	spinlock_t alarm_lock;
45 
46 	bool wake_en;
47 };
48 
49 struct s3c_rtc_data {
50 	bool needs_src_clk;
51 
52 	void (*irq_handler) (struct s3c_rtc *info, int mask);
53 	void (*enable) (struct s3c_rtc *info);
54 	void (*disable) (struct s3c_rtc *info);
55 };
56 
s3c_rtc_enable_clk(struct s3c_rtc * info)57 static int s3c_rtc_enable_clk(struct s3c_rtc *info)
58 {
59 	int ret;
60 
61 	ret = clk_enable(info->rtc_clk);
62 	if (ret)
63 		return ret;
64 
65 	if (info->data->needs_src_clk) {
66 		ret = clk_enable(info->rtc_src_clk);
67 		if (ret) {
68 			clk_disable(info->rtc_clk);
69 			return ret;
70 		}
71 	}
72 	return 0;
73 }
74 
s3c_rtc_disable_clk(struct s3c_rtc * info)75 static void s3c_rtc_disable_clk(struct s3c_rtc *info)
76 {
77 	if (info->data->needs_src_clk)
78 		clk_disable(info->rtc_src_clk);
79 	clk_disable(info->rtc_clk);
80 }
81 
82 /* IRQ Handler */
s3c_rtc_alarmirq(int irq,void * id)83 static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
84 {
85 	struct s3c_rtc *info = (struct s3c_rtc *)id;
86 
87 	if (info->data->irq_handler)
88 		info->data->irq_handler(info, S3C2410_INTP_ALM);
89 
90 	return IRQ_HANDLED;
91 }
92 
93 /* Update control registers */
s3c_rtc_setaie(struct device * dev,unsigned int enabled)94 static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
95 {
96 	struct s3c_rtc *info = dev_get_drvdata(dev);
97 	unsigned long flags;
98 	unsigned int tmp;
99 	int ret;
100 
101 	dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled);
102 
103 	ret = s3c_rtc_enable_clk(info);
104 	if (ret)
105 		return ret;
106 
107 	tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
108 
109 	if (enabled)
110 		tmp |= S3C2410_RTCALM_ALMEN;
111 
112 	writeb(tmp, info->base + S3C2410_RTCALM);
113 
114 	spin_lock_irqsave(&info->alarm_lock, flags);
115 
116 	if (info->alarm_enabled && !enabled)
117 		s3c_rtc_disable_clk(info);
118 	else if (!info->alarm_enabled && enabled)
119 		ret = s3c_rtc_enable_clk(info);
120 
121 	info->alarm_enabled = enabled;
122 	spin_unlock_irqrestore(&info->alarm_lock, flags);
123 
124 	s3c_rtc_disable_clk(info);
125 
126 	return ret;
127 }
128 
129 /* Read time from RTC and convert it from BCD */
s3c_rtc_read_time(struct s3c_rtc * info,struct rtc_time * tm)130 static int s3c_rtc_read_time(struct s3c_rtc *info, struct rtc_time *tm)
131 {
132 	unsigned int have_retried = 0;
133 	int ret;
134 
135 	ret = s3c_rtc_enable_clk(info);
136 	if (ret)
137 		return ret;
138 
139 retry_get_time:
140 	tm->tm_min  = readb(info->base + S3C2410_RTCMIN);
141 	tm->tm_hour = readb(info->base + S3C2410_RTCHOUR);
142 	tm->tm_mday = readb(info->base + S3C2410_RTCDATE);
143 	tm->tm_mon  = readb(info->base + S3C2410_RTCMON);
144 	tm->tm_year = readb(info->base + S3C2410_RTCYEAR);
145 	tm->tm_sec  = readb(info->base + S3C2410_RTCSEC);
146 
147 	/*
148 	 * The only way to work out whether the system was mid-update
149 	 * when we read it is to check the second counter, and if it
150 	 * is zero, then we re-try the entire read
151 	 */
152 	if (tm->tm_sec == 0 && !have_retried) {
153 		have_retried = 1;
154 		goto retry_get_time;
155 	}
156 
157 	s3c_rtc_disable_clk(info);
158 
159 	tm->tm_sec  = bcd2bin(tm->tm_sec);
160 	tm->tm_min  = bcd2bin(tm->tm_min);
161 	tm->tm_hour = bcd2bin(tm->tm_hour);
162 	tm->tm_mday = bcd2bin(tm->tm_mday);
163 	tm->tm_mon  = bcd2bin(tm->tm_mon);
164 	tm->tm_year = bcd2bin(tm->tm_year);
165 
166 	return 0;
167 }
168 
169 /* Convert time to BCD and write it to RTC */
s3c_rtc_write_time(struct s3c_rtc * info,const struct rtc_time * tm)170 static int s3c_rtc_write_time(struct s3c_rtc *info, const struct rtc_time *tm)
171 {
172 	int ret;
173 
174 	ret = s3c_rtc_enable_clk(info);
175 	if (ret)
176 		return ret;
177 
178 	writeb(bin2bcd(tm->tm_sec),  info->base + S3C2410_RTCSEC);
179 	writeb(bin2bcd(tm->tm_min),  info->base + S3C2410_RTCMIN);
180 	writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR);
181 	writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE);
182 	writeb(bin2bcd(tm->tm_mon),  info->base + S3C2410_RTCMON);
183 	writeb(bin2bcd(tm->tm_year), info->base + S3C2410_RTCYEAR);
184 
185 	s3c_rtc_disable_clk(info);
186 
187 	return 0;
188 }
189 
s3c_rtc_gettime(struct device * dev,struct rtc_time * tm)190 static int s3c_rtc_gettime(struct device *dev, struct rtc_time *tm)
191 {
192 	struct s3c_rtc *info = dev_get_drvdata(dev);
193 	int ret;
194 
195 	ret = s3c_rtc_read_time(info, tm);
196 	if (ret)
197 		return ret;
198 
199 	/* Convert internal representation to actual date/time */
200 	tm->tm_year += 100;
201 	tm->tm_mon -= 1;
202 
203 	dev_dbg(dev, "read time %ptR\n", tm);
204 	return 0;
205 }
206 
s3c_rtc_settime(struct device * dev,struct rtc_time * tm)207 static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
208 {
209 	struct s3c_rtc *info = dev_get_drvdata(dev);
210 	struct rtc_time rtc_tm = *tm;
211 
212 	dev_dbg(dev, "set time %ptR\n", tm);
213 
214 	/*
215 	 * Convert actual date/time to internal representation.
216 	 * We get around Y2K by simply not supporting it.
217 	 */
218 	rtc_tm.tm_year -= 100;
219 	rtc_tm.tm_mon += 1;
220 
221 	return s3c_rtc_write_time(info, &rtc_tm);
222 }
223 
s3c_rtc_getalarm(struct device * dev,struct rtc_wkalrm * alrm)224 static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
225 {
226 	struct s3c_rtc *info = dev_get_drvdata(dev);
227 	struct rtc_time *alm_tm = &alrm->time;
228 	unsigned int alm_en;
229 	int ret;
230 
231 	ret = s3c_rtc_enable_clk(info);
232 	if (ret)
233 		return ret;
234 
235 	alm_tm->tm_sec  = readb(info->base + S3C2410_ALMSEC);
236 	alm_tm->tm_min  = readb(info->base + S3C2410_ALMMIN);
237 	alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR);
238 	alm_tm->tm_mon  = readb(info->base + S3C2410_ALMMON);
239 	alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE);
240 	alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR);
241 
242 	alm_en = readb(info->base + S3C2410_RTCALM);
243 
244 	s3c_rtc_disable_clk(info);
245 
246 	alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
247 
248 	dev_dbg(dev, "read alarm %d, %ptR\n", alm_en, alm_tm);
249 
250 	/* decode the alarm enable field */
251 	if (alm_en & S3C2410_RTCALM_SECEN)
252 		alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
253 
254 	if (alm_en & S3C2410_RTCALM_MINEN)
255 		alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
256 
257 	if (alm_en & S3C2410_RTCALM_HOUREN)
258 		alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
259 
260 	if (alm_en & S3C2410_RTCALM_DAYEN)
261 		alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);
262 
263 	if (alm_en & S3C2410_RTCALM_MONEN) {
264 		alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
265 		alm_tm->tm_mon -= 1;
266 	}
267 
268 	if (alm_en & S3C2410_RTCALM_YEAREN)
269 		alm_tm->tm_year = bcd2bin(alm_tm->tm_year);
270 
271 	return 0;
272 }
273 
s3c_rtc_setalarm(struct device * dev,struct rtc_wkalrm * alrm)274 static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
275 {
276 	struct s3c_rtc *info = dev_get_drvdata(dev);
277 	struct rtc_time *tm = &alrm->time;
278 	unsigned int alrm_en;
279 	int ret;
280 
281 	dev_dbg(dev, "s3c_rtc_setalarm: %d, %ptR\n", alrm->enabled, tm);
282 
283 	ret = s3c_rtc_enable_clk(info);
284 	if (ret)
285 		return ret;
286 
287 	alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
288 	writeb(0x00, info->base + S3C2410_RTCALM);
289 
290 	if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
291 		alrm_en |= S3C2410_RTCALM_SECEN;
292 		writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_ALMSEC);
293 	}
294 
295 	if (tm->tm_min < 60 && tm->tm_min >= 0) {
296 		alrm_en |= S3C2410_RTCALM_MINEN;
297 		writeb(bin2bcd(tm->tm_min), info->base + S3C2410_ALMMIN);
298 	}
299 
300 	if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
301 		alrm_en |= S3C2410_RTCALM_HOUREN;
302 		writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_ALMHOUR);
303 	}
304 
305 	if (tm->tm_mon < 12 && tm->tm_mon >= 0) {
306 		alrm_en |= S3C2410_RTCALM_MONEN;
307 		writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_ALMMON);
308 	}
309 
310 	if (tm->tm_mday <= 31 && tm->tm_mday >= 1) {
311 		alrm_en |= S3C2410_RTCALM_DAYEN;
312 		writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_ALMDATE);
313 	}
314 
315 	dev_dbg(dev, "setting S3C2410_RTCALM to %08x\n", alrm_en);
316 
317 	writeb(alrm_en, info->base + S3C2410_RTCALM);
318 
319 	s3c_rtc_setaie(dev, alrm->enabled);
320 
321 	s3c_rtc_disable_clk(info);
322 
323 	return 0;
324 }
325 
326 static const struct rtc_class_ops s3c_rtcops = {
327 	.read_time	= s3c_rtc_gettime,
328 	.set_time	= s3c_rtc_settime,
329 	.read_alarm	= s3c_rtc_getalarm,
330 	.set_alarm	= s3c_rtc_setalarm,
331 	.alarm_irq_enable = s3c_rtc_setaie,
332 };
333 
s3c24xx_rtc_enable(struct s3c_rtc * info)334 static void s3c24xx_rtc_enable(struct s3c_rtc *info)
335 {
336 	unsigned int con, tmp;
337 
338 	con = readw(info->base + S3C2410_RTCCON);
339 	/* re-enable the device, and check it is ok */
340 	if ((con & S3C2410_RTCCON_RTCEN) == 0) {
341 		dev_info(info->dev, "rtc disabled, re-enabling\n");
342 
343 		tmp = readw(info->base + S3C2410_RTCCON);
344 		writew(tmp | S3C2410_RTCCON_RTCEN, info->base + S3C2410_RTCCON);
345 	}
346 
347 	if (con & S3C2410_RTCCON_CNTSEL) {
348 		dev_info(info->dev, "removing RTCCON_CNTSEL\n");
349 
350 		tmp = readw(info->base + S3C2410_RTCCON);
351 		writew(tmp & ~S3C2410_RTCCON_CNTSEL,
352 		       info->base + S3C2410_RTCCON);
353 	}
354 
355 	if (con & S3C2410_RTCCON_CLKRST) {
356 		dev_info(info->dev, "removing RTCCON_CLKRST\n");
357 
358 		tmp = readw(info->base + S3C2410_RTCCON);
359 		writew(tmp & ~S3C2410_RTCCON_CLKRST,
360 		       info->base + S3C2410_RTCCON);
361 	}
362 }
363 
s3c24xx_rtc_disable(struct s3c_rtc * info)364 static void s3c24xx_rtc_disable(struct s3c_rtc *info)
365 {
366 	unsigned int con;
367 
368 	con = readw(info->base + S3C2410_RTCCON);
369 	con &= ~S3C2410_RTCCON_RTCEN;
370 	writew(con, info->base + S3C2410_RTCCON);
371 
372 	con = readb(info->base + S3C2410_TICNT);
373 	con &= ~S3C2410_TICNT_ENABLE;
374 	writeb(con, info->base + S3C2410_TICNT);
375 }
376 
s3c6410_rtc_disable(struct s3c_rtc * info)377 static void s3c6410_rtc_disable(struct s3c_rtc *info)
378 {
379 	unsigned int con;
380 
381 	con = readw(info->base + S3C2410_RTCCON);
382 	con &= ~S3C64XX_RTCCON_TICEN;
383 	con &= ~S3C2410_RTCCON_RTCEN;
384 	writew(con, info->base + S3C2410_RTCCON);
385 }
386 
s3c_rtc_remove(struct platform_device * pdev)387 static void s3c_rtc_remove(struct platform_device *pdev)
388 {
389 	struct s3c_rtc *info = platform_get_drvdata(pdev);
390 
391 	s3c_rtc_setaie(info->dev, 0);
392 
393 	if (info->data->needs_src_clk)
394 		clk_unprepare(info->rtc_src_clk);
395 	clk_unprepare(info->rtc_clk);
396 }
397 
s3c_rtc_probe(struct platform_device * pdev)398 static int s3c_rtc_probe(struct platform_device *pdev)
399 {
400 	struct s3c_rtc *info = NULL;
401 	int ret;
402 
403 	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
404 	if (!info)
405 		return -ENOMEM;
406 
407 	info->dev = &pdev->dev;
408 	info->data = of_device_get_match_data(&pdev->dev);
409 	if (!info->data) {
410 		dev_err(&pdev->dev, "failed getting s3c_rtc_data\n");
411 		return -EINVAL;
412 	}
413 	spin_lock_init(&info->alarm_lock);
414 
415 	platform_set_drvdata(pdev, info);
416 
417 	info->irq_alarm = platform_get_irq(pdev, 0);
418 	if (info->irq_alarm < 0)
419 		return info->irq_alarm;
420 
421 	dev_dbg(&pdev->dev, "s3c2410_rtc: alarm irq %d\n", info->irq_alarm);
422 
423 	/* get the memory region */
424 	info->base = devm_platform_ioremap_resource(pdev, 0);
425 	if (IS_ERR(info->base))
426 		return PTR_ERR(info->base);
427 
428 	info->rtc_clk = devm_clk_get(&pdev->dev, "rtc");
429 	if (IS_ERR(info->rtc_clk))
430 		return dev_err_probe(&pdev->dev, PTR_ERR(info->rtc_clk),
431 				     "failed to find rtc clock\n");
432 	ret = clk_prepare_enable(info->rtc_clk);
433 	if (ret)
434 		return ret;
435 
436 	if (info->data->needs_src_clk) {
437 		info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src");
438 		if (IS_ERR(info->rtc_src_clk)) {
439 			ret = dev_err_probe(&pdev->dev, PTR_ERR(info->rtc_src_clk),
440 					    "failed to find rtc source clock\n");
441 			goto err_src_clk;
442 		}
443 		ret = clk_prepare_enable(info->rtc_src_clk);
444 		if (ret)
445 			goto err_src_clk;
446 	}
447 
448 	/* disable RTC enable bits potentially set by the bootloader */
449 	if (info->data->disable)
450 		info->data->disable(info);
451 
452 	/* check to see if everything is setup correctly */
453 	if (info->data->enable)
454 		info->data->enable(info);
455 
456 	dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n",
457 		readw(info->base + S3C2410_RTCCON));
458 
459 	device_init_wakeup(&pdev->dev, 1);
460 
461 	info->rtc = devm_rtc_allocate_device(&pdev->dev);
462 	if (IS_ERR(info->rtc)) {
463 		ret = PTR_ERR(info->rtc);
464 		goto err_nortc;
465 	}
466 
467 	info->rtc->ops = &s3c_rtcops;
468 	info->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
469 	info->rtc->range_max = RTC_TIMESTAMP_END_2099;
470 
471 	ret = devm_rtc_register_device(info->rtc);
472 	if (ret)
473 		goto err_nortc;
474 
475 	ret = devm_request_irq(&pdev->dev, info->irq_alarm, s3c_rtc_alarmirq,
476 			       0, "s3c2410-rtc alarm", info);
477 	if (ret) {
478 		dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_alarm, ret);
479 		goto err_nortc;
480 	}
481 
482 	s3c_rtc_disable_clk(info);
483 
484 	return 0;
485 
486 err_nortc:
487 	if (info->data->disable)
488 		info->data->disable(info);
489 
490 	if (info->data->needs_src_clk)
491 		clk_disable_unprepare(info->rtc_src_clk);
492 err_src_clk:
493 	clk_disable_unprepare(info->rtc_clk);
494 
495 	return ret;
496 }
497 
498 #ifdef CONFIG_PM_SLEEP
499 
s3c_rtc_suspend(struct device * dev)500 static int s3c_rtc_suspend(struct device *dev)
501 {
502 	struct s3c_rtc *info = dev_get_drvdata(dev);
503 	int ret;
504 
505 	ret = s3c_rtc_enable_clk(info);
506 	if (ret)
507 		return ret;
508 
509 	if (info->data->disable)
510 		info->data->disable(info);
511 
512 	if (device_may_wakeup(dev) && !info->wake_en) {
513 		if (enable_irq_wake(info->irq_alarm) == 0)
514 			info->wake_en = true;
515 		else
516 			dev_err(dev, "enable_irq_wake failed\n");
517 	}
518 
519 	return 0;
520 }
521 
s3c_rtc_resume(struct device * dev)522 static int s3c_rtc_resume(struct device *dev)
523 {
524 	struct s3c_rtc *info = dev_get_drvdata(dev);
525 
526 	if (info->data->enable)
527 		info->data->enable(info);
528 
529 	s3c_rtc_disable_clk(info);
530 
531 	if (device_may_wakeup(dev) && info->wake_en) {
532 		disable_irq_wake(info->irq_alarm);
533 		info->wake_en = false;
534 	}
535 
536 	return 0;
537 }
538 #endif
539 static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
540 
s3c24xx_rtc_irq(struct s3c_rtc * info,int mask)541 static void s3c24xx_rtc_irq(struct s3c_rtc *info, int mask)
542 {
543 	rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
544 }
545 
s3c6410_rtc_irq(struct s3c_rtc * info,int mask)546 static void s3c6410_rtc_irq(struct s3c_rtc *info, int mask)
547 {
548 	rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
549 	writeb(mask, info->base + S3C2410_INTP);
550 }
551 
552 static struct s3c_rtc_data const s3c2410_rtc_data = {
553 	.irq_handler		= s3c24xx_rtc_irq,
554 	.enable			= s3c24xx_rtc_enable,
555 	.disable		= s3c24xx_rtc_disable,
556 };
557 
558 static struct s3c_rtc_data const s3c2416_rtc_data = {
559 	.irq_handler		= s3c24xx_rtc_irq,
560 	.enable			= s3c24xx_rtc_enable,
561 	.disable		= s3c24xx_rtc_disable,
562 };
563 
564 static struct s3c_rtc_data const s3c2443_rtc_data = {
565 	.irq_handler		= s3c24xx_rtc_irq,
566 	.enable			= s3c24xx_rtc_enable,
567 	.disable		= s3c24xx_rtc_disable,
568 };
569 
570 static struct s3c_rtc_data const s3c6410_rtc_data = {
571 	.needs_src_clk		= true,
572 	.irq_handler		= s3c6410_rtc_irq,
573 	.enable			= s3c24xx_rtc_enable,
574 	.disable		= s3c6410_rtc_disable,
575 };
576 
577 static const __maybe_unused struct of_device_id s3c_rtc_dt_match[] = {
578 	{
579 		.compatible = "samsung,s3c2410-rtc",
580 		.data = &s3c2410_rtc_data,
581 	}, {
582 		.compatible = "samsung,s3c2416-rtc",
583 		.data = &s3c2416_rtc_data,
584 	}, {
585 		.compatible = "samsung,s3c2443-rtc",
586 		.data = &s3c2443_rtc_data,
587 	}, {
588 		.compatible = "samsung,s3c6410-rtc",
589 		.data = &s3c6410_rtc_data,
590 	}, {
591 		.compatible = "samsung,exynos3250-rtc",
592 		.data = &s3c6410_rtc_data,
593 	},
594 	{ /* sentinel */ },
595 };
596 MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
597 
598 static struct platform_driver s3c_rtc_driver = {
599 	.probe		= s3c_rtc_probe,
600 	.remove_new	= s3c_rtc_remove,
601 	.driver		= {
602 		.name	= "s3c-rtc",
603 		.pm	= &s3c_rtc_pm_ops,
604 		.of_match_table	= of_match_ptr(s3c_rtc_dt_match),
605 	},
606 };
607 module_platform_driver(s3c_rtc_driver);
608 
609 MODULE_DESCRIPTION("Samsung S3C RTC Driver");
610 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
611 MODULE_LICENSE("GPL");
612 MODULE_ALIAS("platform:s3c2410-rtc");
613