blob: 64d9727b722970a080155e0527676e9f0a1defcf [file] [log] [blame]
David Brownelldb68b182006-12-06 20:38:36 -08001/*
2 * TI OMAP1 Real Time Clock interface for Linux
3 *
4 * Copyright (C) 2003 MontaVista Software, Inc.
5 * Author: George G. Davis <gdavis@mvista.com> or <source@mvista.com>
6 *
7 * Copyright (C) 2006 David Brownell (new RTC framework)
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15#include <linux/kernel.h>
16#include <linux/init.h>
17#include <linux/module.h>
18#include <linux/ioport.h>
19#include <linux/delay.h>
20#include <linux/rtc.h>
21#include <linux/bcd.h>
22#include <linux/platform_device.h>
23
24#include <asm/io.h>
David Brownelldb68b182006-12-06 20:38:36 -080025
26
27/* The OMAP1 RTC is a year/month/day/hours/minutes/seconds BCD clock
28 * with century-range alarm matching, driven by the 32kHz clock.
29 *
30 * The main user-visible ways it differs from PC RTCs are by omitting
31 * "don't care" alarm fields and sub-second periodic IRQs, and having
32 * an autoadjust mechanism to calibrate to the true oscillator rate.
33 *
34 * Board-specific wiring options include using split power mode with
35 * RTC_OFF_NOFF used as the reset signal (so the RTC won't be reset),
36 * and wiring RTC_WAKE_INT (so the RTC alarm can wake the system from
37 * low power modes). See the BOARD-SPECIFIC CUSTOMIZATION comment.
38 */
39
40#define OMAP_RTC_BASE 0xfffb4800
41
42/* RTC registers */
43#define OMAP_RTC_SECONDS_REG 0x00
44#define OMAP_RTC_MINUTES_REG 0x04
45#define OMAP_RTC_HOURS_REG 0x08
46#define OMAP_RTC_DAYS_REG 0x0C
47#define OMAP_RTC_MONTHS_REG 0x10
48#define OMAP_RTC_YEARS_REG 0x14
49#define OMAP_RTC_WEEKS_REG 0x18
50
51#define OMAP_RTC_ALARM_SECONDS_REG 0x20
52#define OMAP_RTC_ALARM_MINUTES_REG 0x24
53#define OMAP_RTC_ALARM_HOURS_REG 0x28
54#define OMAP_RTC_ALARM_DAYS_REG 0x2c
55#define OMAP_RTC_ALARM_MONTHS_REG 0x30
56#define OMAP_RTC_ALARM_YEARS_REG 0x34
57
58#define OMAP_RTC_CTRL_REG 0x40
59#define OMAP_RTC_STATUS_REG 0x44
60#define OMAP_RTC_INTERRUPTS_REG 0x48
61
62#define OMAP_RTC_COMP_LSB_REG 0x4c
63#define OMAP_RTC_COMP_MSB_REG 0x50
64#define OMAP_RTC_OSC_REG 0x54
65
66/* OMAP_RTC_CTRL_REG bit fields: */
67#define OMAP_RTC_CTRL_SPLIT (1<<7)
68#define OMAP_RTC_CTRL_DISABLE (1<<6)
69#define OMAP_RTC_CTRL_SET_32_COUNTER (1<<5)
70#define OMAP_RTC_CTRL_TEST (1<<4)
71#define OMAP_RTC_CTRL_MODE_12_24 (1<<3)
72#define OMAP_RTC_CTRL_AUTO_COMP (1<<2)
73#define OMAP_RTC_CTRL_ROUND_30S (1<<1)
74#define OMAP_RTC_CTRL_STOP (1<<0)
75
76/* OMAP_RTC_STATUS_REG bit fields: */
77#define OMAP_RTC_STATUS_POWER_UP (1<<7)
78#define OMAP_RTC_STATUS_ALARM (1<<6)
79#define OMAP_RTC_STATUS_1D_EVENT (1<<5)
80#define OMAP_RTC_STATUS_1H_EVENT (1<<4)
81#define OMAP_RTC_STATUS_1M_EVENT (1<<3)
82#define OMAP_RTC_STATUS_1S_EVENT (1<<2)
83#define OMAP_RTC_STATUS_RUN (1<<1)
84#define OMAP_RTC_STATUS_BUSY (1<<0)
85
86/* OMAP_RTC_INTERRUPTS_REG bit fields: */
87#define OMAP_RTC_INTERRUPTS_IT_ALARM (1<<3)
88#define OMAP_RTC_INTERRUPTS_IT_TIMER (1<<2)
89
Mark A. Greer8cfde8c2009-12-15 16:46:11 -080090static void __iomem *rtc_base;
David Brownelldb68b182006-12-06 20:38:36 -080091
Mark A. Greer8cfde8c2009-12-15 16:46:11 -080092#define rtc_read(addr) __raw_readb(rtc_base + (addr))
93#define rtc_write(val, addr) __raw_writeb(val, rtc_base + (addr))
David Brownelldb68b182006-12-06 20:38:36 -080094
95
David Brownelldb68b182006-12-06 20:38:36 -080096/* we rely on the rtc framework to handle locking (rtc->ops_lock),
97 * so the only other requirement is that register accesses which
98 * require BUSY to be clear are made with IRQs locally disabled
99 */
100static void rtc_wait_not_busy(void)
101{
102 int count = 0;
103 u8 status;
104
105 /* BUSY may stay active for 1/32768 second (~30 usec) */
106 for (count = 0; count < 50; count++) {
107 status = rtc_read(OMAP_RTC_STATUS_REG);
108 if ((status & (u8)OMAP_RTC_STATUS_BUSY) == 0)
109 break;
110 udelay(1);
111 }
112 /* now we have ~15 usec to read/write various registers */
113}
114
David Brownellab6a2d72007-05-08 00:33:30 -0700115static irqreturn_t rtc_irq(int irq, void *rtc)
David Brownelldb68b182006-12-06 20:38:36 -0800116{
117 unsigned long events = 0;
118 u8 irq_data;
119
120 irq_data = rtc_read(OMAP_RTC_STATUS_REG);
121
122 /* alarm irq? */
123 if (irq_data & OMAP_RTC_STATUS_ALARM) {
124 rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
125 events |= RTC_IRQF | RTC_AF;
126 }
127
128 /* 1/sec periodic/update irq? */
129 if (irq_data & OMAP_RTC_STATUS_1S_EVENT)
130 events |= RTC_IRQF | RTC_UF;
131
David Brownellab6a2d72007-05-08 00:33:30 -0700132 rtc_update_irq(rtc, 1, events);
David Brownelldb68b182006-12-06 20:38:36 -0800133
134 return IRQ_HANDLED;
135}
136
137#ifdef CONFIG_RTC_INTF_DEV
138
139static int
140omap_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
141{
142 u8 reg;
143
144 switch (cmd) {
145 case RTC_AIE_OFF:
146 case RTC_AIE_ON:
147 case RTC_UIE_OFF:
148 case RTC_UIE_ON:
149 break;
150 default:
151 return -ENOIOCTLCMD;
152 }
153
154 local_irq_disable();
155 rtc_wait_not_busy();
156 reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
157 switch (cmd) {
158 /* AIE = Alarm Interrupt Enable */
159 case RTC_AIE_OFF:
160 reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
161 break;
162 case RTC_AIE_ON:
163 reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
164 break;
165 /* UIE = Update Interrupt Enable (1/second) */
166 case RTC_UIE_OFF:
167 reg &= ~OMAP_RTC_INTERRUPTS_IT_TIMER;
168 break;
169 case RTC_UIE_ON:
170 reg |= OMAP_RTC_INTERRUPTS_IT_TIMER;
171 break;
172 }
173 rtc_wait_not_busy();
174 rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
175 local_irq_enable();
176
177 return 0;
178}
179
180#else
181#define omap_rtc_ioctl NULL
182#endif
183
184/* this hardware doesn't support "don't care" alarm fields */
185static int tm2bcd(struct rtc_time *tm)
186{
187 if (rtc_valid_tm(tm) != 0)
188 return -EINVAL;
189
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700190 tm->tm_sec = bin2bcd(tm->tm_sec);
191 tm->tm_min = bin2bcd(tm->tm_min);
192 tm->tm_hour = bin2bcd(tm->tm_hour);
193 tm->tm_mday = bin2bcd(tm->tm_mday);
David Brownelldb68b182006-12-06 20:38:36 -0800194
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700195 tm->tm_mon = bin2bcd(tm->tm_mon + 1);
David Brownelldb68b182006-12-06 20:38:36 -0800196
197 /* epoch == 1900 */
198 if (tm->tm_year < 100 || tm->tm_year > 199)
199 return -EINVAL;
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700200 tm->tm_year = bin2bcd(tm->tm_year - 100);
David Brownelldb68b182006-12-06 20:38:36 -0800201
202 return 0;
203}
204
205static void bcd2tm(struct rtc_time *tm)
206{
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700207 tm->tm_sec = bcd2bin(tm->tm_sec);
208 tm->tm_min = bcd2bin(tm->tm_min);
209 tm->tm_hour = bcd2bin(tm->tm_hour);
210 tm->tm_mday = bcd2bin(tm->tm_mday);
211 tm->tm_mon = bcd2bin(tm->tm_mon) - 1;
David Brownelldb68b182006-12-06 20:38:36 -0800212 /* epoch == 1900 */
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700213 tm->tm_year = bcd2bin(tm->tm_year) + 100;
David Brownelldb68b182006-12-06 20:38:36 -0800214}
215
216
217static int omap_rtc_read_time(struct device *dev, struct rtc_time *tm)
218{
219 /* we don't report wday/yday/isdst ... */
220 local_irq_disable();
221 rtc_wait_not_busy();
222
223 tm->tm_sec = rtc_read(OMAP_RTC_SECONDS_REG);
224 tm->tm_min = rtc_read(OMAP_RTC_MINUTES_REG);
225 tm->tm_hour = rtc_read(OMAP_RTC_HOURS_REG);
226 tm->tm_mday = rtc_read(OMAP_RTC_DAYS_REG);
227 tm->tm_mon = rtc_read(OMAP_RTC_MONTHS_REG);
228 tm->tm_year = rtc_read(OMAP_RTC_YEARS_REG);
229
230 local_irq_enable();
231
232 bcd2tm(tm);
233 return 0;
234}
235
236static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm)
237{
238 if (tm2bcd(tm) < 0)
239 return -EINVAL;
240 local_irq_disable();
241 rtc_wait_not_busy();
242
243 rtc_write(tm->tm_year, OMAP_RTC_YEARS_REG);
244 rtc_write(tm->tm_mon, OMAP_RTC_MONTHS_REG);
245 rtc_write(tm->tm_mday, OMAP_RTC_DAYS_REG);
246 rtc_write(tm->tm_hour, OMAP_RTC_HOURS_REG);
247 rtc_write(tm->tm_min, OMAP_RTC_MINUTES_REG);
248 rtc_write(tm->tm_sec, OMAP_RTC_SECONDS_REG);
249
250 local_irq_enable();
251
252 return 0;
253}
254
255static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
256{
257 local_irq_disable();
258 rtc_wait_not_busy();
259
260 alm->time.tm_sec = rtc_read(OMAP_RTC_ALARM_SECONDS_REG);
261 alm->time.tm_min = rtc_read(OMAP_RTC_ALARM_MINUTES_REG);
262 alm->time.tm_hour = rtc_read(OMAP_RTC_ALARM_HOURS_REG);
263 alm->time.tm_mday = rtc_read(OMAP_RTC_ALARM_DAYS_REG);
264 alm->time.tm_mon = rtc_read(OMAP_RTC_ALARM_MONTHS_REG);
265 alm->time.tm_year = rtc_read(OMAP_RTC_ALARM_YEARS_REG);
266
267 local_irq_enable();
268
269 bcd2tm(&alm->time);
David Brownella2db8df2006-12-13 00:35:08 -0800270 alm->enabled = !!(rtc_read(OMAP_RTC_INTERRUPTS_REG)
David Brownelldb68b182006-12-06 20:38:36 -0800271 & OMAP_RTC_INTERRUPTS_IT_ALARM);
David Brownelldb68b182006-12-06 20:38:36 -0800272
273 return 0;
274}
275
276static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
277{
278 u8 reg;
279
David Brownelldb68b182006-12-06 20:38:36 -0800280 if (tm2bcd(&alm->time) < 0)
281 return -EINVAL;
282
283 local_irq_disable();
284 rtc_wait_not_busy();
285
286 rtc_write(alm->time.tm_year, OMAP_RTC_ALARM_YEARS_REG);
287 rtc_write(alm->time.tm_mon, OMAP_RTC_ALARM_MONTHS_REG);
288 rtc_write(alm->time.tm_mday, OMAP_RTC_ALARM_DAYS_REG);
289 rtc_write(alm->time.tm_hour, OMAP_RTC_ALARM_HOURS_REG);
290 rtc_write(alm->time.tm_min, OMAP_RTC_ALARM_MINUTES_REG);
291 rtc_write(alm->time.tm_sec, OMAP_RTC_ALARM_SECONDS_REG);
292
293 reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
294 if (alm->enabled)
295 reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
296 else
297 reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
298 rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
299
300 local_irq_enable();
301
302 return 0;
303}
304
305static struct rtc_class_ops omap_rtc_ops = {
306 .ioctl = omap_rtc_ioctl,
307 .read_time = omap_rtc_read_time,
308 .set_time = omap_rtc_set_time,
309 .read_alarm = omap_rtc_read_alarm,
310 .set_alarm = omap_rtc_set_alarm,
311};
312
313static int omap_rtc_alarm;
314static int omap_rtc_timer;
315
David Brownell71fc8222008-07-23 21:30:38 -0700316static int __init omap_rtc_probe(struct platform_device *pdev)
David Brownelldb68b182006-12-06 20:38:36 -0800317{
318 struct resource *res, *mem;
319 struct rtc_device *rtc;
320 u8 reg, new_ctrl;
321
322 omap_rtc_timer = platform_get_irq(pdev, 0);
323 if (omap_rtc_timer <= 0) {
324 pr_debug("%s: no update irq?\n", pdev->name);
325 return -ENOENT;
326 }
327
328 omap_rtc_alarm = platform_get_irq(pdev, 1);
329 if (omap_rtc_alarm <= 0) {
330 pr_debug("%s: no alarm irq?\n", pdev->name);
331 return -ENOENT;
332 }
333
David Brownelldb68b182006-12-06 20:38:36 -0800334 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800335 if (!res) {
336 pr_debug("%s: RTC resource data missing\n", pdev->name);
David Brownelldb68b182006-12-06 20:38:36 -0800337 return -ENOENT;
338 }
339
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800340 mem = request_mem_region(res->start, resource_size(res), pdev->name);
David Brownelldb68b182006-12-06 20:38:36 -0800341 if (!mem) {
342 pr_debug("%s: RTC registers at %08x are not free\n",
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800343 pdev->name, res->start);
David Brownelldb68b182006-12-06 20:38:36 -0800344 return -EBUSY;
345 }
346
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800347 rtc_base = ioremap(res->start, resource_size(res));
348 if (!rtc_base) {
349 pr_debug("%s: RTC registers can't be mapped\n", pdev->name);
350 goto fail;
351 }
352
David Brownelldb68b182006-12-06 20:38:36 -0800353 rtc = rtc_device_register(pdev->name, &pdev->dev,
354 &omap_rtc_ops, THIS_MODULE);
355 if (IS_ERR(rtc)) {
356 pr_debug("%s: can't register RTC device, err %ld\n",
357 pdev->name, PTR_ERR(rtc));
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800358 goto fail0;
David Brownelldb68b182006-12-06 20:38:36 -0800359 }
360 platform_set_drvdata(pdev, rtc);
David Brownell558a40f2007-05-16 22:11:14 -0700361 dev_set_drvdata(&rtc->dev, mem);
David Brownelldb68b182006-12-06 20:38:36 -0800362
363 /* clear pending irqs, and set 1/second periodic,
364 * which we'll use instead of update irqs
365 */
366 rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
367
368 /* clear old status */
369 reg = rtc_read(OMAP_RTC_STATUS_REG);
370 if (reg & (u8) OMAP_RTC_STATUS_POWER_UP) {
371 pr_info("%s: RTC power up reset detected\n",
372 pdev->name);
373 rtc_write(OMAP_RTC_STATUS_POWER_UP, OMAP_RTC_STATUS_REG);
374 }
375 if (reg & (u8) OMAP_RTC_STATUS_ALARM)
376 rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
377
378 /* handle periodic and alarm irqs */
Thomas Gleixner38515e92007-02-14 00:33:16 -0800379 if (request_irq(omap_rtc_timer, rtc_irq, IRQF_DISABLED,
Kay Sievers744bcb12009-03-24 16:38:22 -0700380 dev_name(&rtc->dev), rtc)) {
David Brownelldb68b182006-12-06 20:38:36 -0800381 pr_debug("%s: RTC timer interrupt IRQ%d already claimed\n",
382 pdev->name, omap_rtc_timer);
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800383 goto fail1;
David Brownelldb68b182006-12-06 20:38:36 -0800384 }
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800385 if ((omap_rtc_timer != omap_rtc_alarm) &&
386 (request_irq(omap_rtc_alarm, rtc_irq, IRQF_DISABLED,
387 dev_name(&rtc->dev), rtc))) {
David Brownelldb68b182006-12-06 20:38:36 -0800388 pr_debug("%s: RTC alarm interrupt IRQ%d already claimed\n",
389 pdev->name, omap_rtc_alarm);
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800390 goto fail2;
David Brownelldb68b182006-12-06 20:38:36 -0800391 }
392
393 /* On boards with split power, RTC_ON_NOFF won't reset the RTC */
394 reg = rtc_read(OMAP_RTC_CTRL_REG);
395 if (reg & (u8) OMAP_RTC_CTRL_STOP)
396 pr_info("%s: already running\n", pdev->name);
397
398 /* force to 24 hour mode */
399 new_ctrl = reg & ~(OMAP_RTC_CTRL_SPLIT|OMAP_RTC_CTRL_AUTO_COMP);
400 new_ctrl |= OMAP_RTC_CTRL_STOP;
401
402 /* BOARD-SPECIFIC CUSTOMIZATION CAN GO HERE:
403 *
404 * - Boards wired so that RTC_WAKE_INT does something, and muxed
405 * right (W13_1610_RTC_WAKE_INT is the default after chip reset),
406 * should initialize the device wakeup flag appropriately.
407 *
408 * - Boards wired so RTC_ON_nOFF is used as the reset signal,
409 * rather than nPWRON_RESET, should forcibly enable split
410 * power mode. (Some chip errata report that RTC_CTRL_SPLIT
411 * is write-only, and always reads as zero...)
412 */
413 device_init_wakeup(&pdev->dev, 0);
414
415 if (new_ctrl & (u8) OMAP_RTC_CTRL_SPLIT)
416 pr_info("%s: split power mode\n", pdev->name);
417
418 if (reg != new_ctrl)
419 rtc_write(new_ctrl, OMAP_RTC_CTRL_REG);
420
421 return 0;
422
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800423fail2:
David Brownelldb68b182006-12-06 20:38:36 -0800424 free_irq(omap_rtc_timer, NULL);
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800425fail1:
David Brownelldb68b182006-12-06 20:38:36 -0800426 rtc_device_unregister(rtc);
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800427fail0:
428 iounmap(rtc_base);
David Brownelldb68b182006-12-06 20:38:36 -0800429fail:
430 release_resource(mem);
431 return -EIO;
432}
433
David Brownell71fc8222008-07-23 21:30:38 -0700434static int __exit omap_rtc_remove(struct platform_device *pdev)
David Brownelldb68b182006-12-06 20:38:36 -0800435{
Joe Perchesa419aef2009-08-18 11:18:35 -0700436 struct rtc_device *rtc = platform_get_drvdata(pdev);
David Brownelldb68b182006-12-06 20:38:36 -0800437
438 device_init_wakeup(&pdev->dev, 0);
439
440 /* leave rtc running, but disable irqs */
441 rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
442
443 free_irq(omap_rtc_timer, rtc);
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800444
445 if (omap_rtc_timer != omap_rtc_alarm)
446 free_irq(omap_rtc_alarm, rtc);
David Brownelldb68b182006-12-06 20:38:36 -0800447
David Brownell558a40f2007-05-16 22:11:14 -0700448 release_resource(dev_get_drvdata(&rtc->dev));
David Brownelldb68b182006-12-06 20:38:36 -0800449 rtc_device_unregister(rtc);
450 return 0;
451}
452
453#ifdef CONFIG_PM
454
David Brownelldb68b182006-12-06 20:38:36 -0800455static u8 irqstat;
456
457static int omap_rtc_suspend(struct platform_device *pdev, pm_message_t state)
458{
David Brownelldb68b182006-12-06 20:38:36 -0800459 irqstat = rtc_read(OMAP_RTC_INTERRUPTS_REG);
460
461 /* FIXME the RTC alarm is not currently acting as a wakeup event
462 * source, and in fact this enable() call is just saving a flag
463 * that's never used...
464 */
465 if (device_may_wakeup(&pdev->dev))
466 enable_irq_wake(omap_rtc_alarm);
467 else
468 rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
469
470 return 0;
471}
472
473static int omap_rtc_resume(struct platform_device *pdev)
474{
David Brownelldb68b182006-12-06 20:38:36 -0800475 if (device_may_wakeup(&pdev->dev))
476 disable_irq_wake(omap_rtc_alarm);
477 else
478 rtc_write(irqstat, OMAP_RTC_INTERRUPTS_REG);
479 return 0;
480}
481
482#else
483#define omap_rtc_suspend NULL
484#define omap_rtc_resume NULL
485#endif
486
487static void omap_rtc_shutdown(struct platform_device *pdev)
488{
489 rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
490}
491
Kay Sieversad28a072008-04-10 21:29:25 -0700492MODULE_ALIAS("platform:omap_rtc");
David Brownelldb68b182006-12-06 20:38:36 -0800493static struct platform_driver omap_rtc_driver = {
David Brownell71fc8222008-07-23 21:30:38 -0700494 .remove = __exit_p(omap_rtc_remove),
David Brownelldb68b182006-12-06 20:38:36 -0800495 .suspend = omap_rtc_suspend,
496 .resume = omap_rtc_resume,
497 .shutdown = omap_rtc_shutdown,
498 .driver = {
499 .name = "omap_rtc",
500 .owner = THIS_MODULE,
501 },
502};
503
504static int __init rtc_init(void)
505{
David Brownell71fc8222008-07-23 21:30:38 -0700506 return platform_driver_probe(&omap_rtc_driver, omap_rtc_probe);
David Brownelldb68b182006-12-06 20:38:36 -0800507}
508module_init(rtc_init);
509
510static void __exit rtc_exit(void)
511{
512 platform_driver_unregister(&omap_rtc_driver);
513}
514module_exit(rtc_exit);
515
516MODULE_AUTHOR("George G. Davis (and others)");
517MODULE_LICENSE("GPL");