blob: 7789002bdd5c1af65f7c6bff95649e9e72d89db1 [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
Sekhar Norifa5b0782010-10-27 15:33:05 -070037 * low power modes) for OMAP1 boards (OMAP-L138 has this built into
38 * the SoC). See the BOARD-SPECIFIC CUSTOMIZATION comment.
David Brownelldb68b182006-12-06 20:38:36 -080039 */
40
41#define OMAP_RTC_BASE 0xfffb4800
42
43/* RTC registers */
44#define OMAP_RTC_SECONDS_REG 0x00
45#define OMAP_RTC_MINUTES_REG 0x04
46#define OMAP_RTC_HOURS_REG 0x08
47#define OMAP_RTC_DAYS_REG 0x0C
48#define OMAP_RTC_MONTHS_REG 0x10
49#define OMAP_RTC_YEARS_REG 0x14
50#define OMAP_RTC_WEEKS_REG 0x18
51
52#define OMAP_RTC_ALARM_SECONDS_REG 0x20
53#define OMAP_RTC_ALARM_MINUTES_REG 0x24
54#define OMAP_RTC_ALARM_HOURS_REG 0x28
55#define OMAP_RTC_ALARM_DAYS_REG 0x2c
56#define OMAP_RTC_ALARM_MONTHS_REG 0x30
57#define OMAP_RTC_ALARM_YEARS_REG 0x34
58
59#define OMAP_RTC_CTRL_REG 0x40
60#define OMAP_RTC_STATUS_REG 0x44
61#define OMAP_RTC_INTERRUPTS_REG 0x48
62
63#define OMAP_RTC_COMP_LSB_REG 0x4c
64#define OMAP_RTC_COMP_MSB_REG 0x50
65#define OMAP_RTC_OSC_REG 0x54
66
67/* OMAP_RTC_CTRL_REG bit fields: */
68#define OMAP_RTC_CTRL_SPLIT (1<<7)
69#define OMAP_RTC_CTRL_DISABLE (1<<6)
70#define OMAP_RTC_CTRL_SET_32_COUNTER (1<<5)
71#define OMAP_RTC_CTRL_TEST (1<<4)
72#define OMAP_RTC_CTRL_MODE_12_24 (1<<3)
73#define OMAP_RTC_CTRL_AUTO_COMP (1<<2)
74#define OMAP_RTC_CTRL_ROUND_30S (1<<1)
75#define OMAP_RTC_CTRL_STOP (1<<0)
76
77/* OMAP_RTC_STATUS_REG bit fields: */
78#define OMAP_RTC_STATUS_POWER_UP (1<<7)
79#define OMAP_RTC_STATUS_ALARM (1<<6)
80#define OMAP_RTC_STATUS_1D_EVENT (1<<5)
81#define OMAP_RTC_STATUS_1H_EVENT (1<<4)
82#define OMAP_RTC_STATUS_1M_EVENT (1<<3)
83#define OMAP_RTC_STATUS_1S_EVENT (1<<2)
84#define OMAP_RTC_STATUS_RUN (1<<1)
85#define OMAP_RTC_STATUS_BUSY (1<<0)
86
87/* OMAP_RTC_INTERRUPTS_REG bit fields: */
88#define OMAP_RTC_INTERRUPTS_IT_ALARM (1<<3)
89#define OMAP_RTC_INTERRUPTS_IT_TIMER (1<<2)
90
Mark A. Greer8cfde8c2009-12-15 16:46:11 -080091static void __iomem *rtc_base;
David Brownelldb68b182006-12-06 20:38:36 -080092
Mark A. Greer8cfde8c2009-12-15 16:46:11 -080093#define rtc_read(addr) __raw_readb(rtc_base + (addr))
94#define rtc_write(val, addr) __raw_writeb(val, rtc_base + (addr))
David Brownelldb68b182006-12-06 20:38:36 -080095
96
David Brownelldb68b182006-12-06 20:38:36 -080097/* we rely on the rtc framework to handle locking (rtc->ops_lock),
98 * so the only other requirement is that register accesses which
99 * require BUSY to be clear are made with IRQs locally disabled
100 */
101static void rtc_wait_not_busy(void)
102{
103 int count = 0;
104 u8 status;
105
106 /* BUSY may stay active for 1/32768 second (~30 usec) */
107 for (count = 0; count < 50; count++) {
108 status = rtc_read(OMAP_RTC_STATUS_REG);
109 if ((status & (u8)OMAP_RTC_STATUS_BUSY) == 0)
110 break;
111 udelay(1);
112 }
113 /* now we have ~15 usec to read/write various registers */
114}
115
David Brownellab6a2d72007-05-08 00:33:30 -0700116static irqreturn_t rtc_irq(int irq, void *rtc)
David Brownelldb68b182006-12-06 20:38:36 -0800117{
118 unsigned long events = 0;
119 u8 irq_data;
120
121 irq_data = rtc_read(OMAP_RTC_STATUS_REG);
122
123 /* alarm irq? */
124 if (irq_data & OMAP_RTC_STATUS_ALARM) {
125 rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
126 events |= RTC_IRQF | RTC_AF;
127 }
128
129 /* 1/sec periodic/update irq? */
130 if (irq_data & OMAP_RTC_STATUS_1S_EVENT)
131 events |= RTC_IRQF | RTC_UF;
132
David Brownellab6a2d72007-05-08 00:33:30 -0700133 rtc_update_irq(rtc, 1, events);
David Brownelldb68b182006-12-06 20:38:36 -0800134
135 return IRQ_HANDLED;
136}
137
John Stultz16380c12011-02-02 17:02:41 -0800138static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
139{
140 u8 reg;
141
142 local_irq_disable();
143 rtc_wait_not_busy();
144 reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
145 if (enabled)
146 reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
147 else
148 reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
149 rtc_wait_not_busy();
150 rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
151 local_irq_enable();
152
153 return 0;
154}
155
David Brownelldb68b182006-12-06 20:38:36 -0800156/* this hardware doesn't support "don't care" alarm fields */
157static int tm2bcd(struct rtc_time *tm)
158{
159 if (rtc_valid_tm(tm) != 0)
160 return -EINVAL;
161
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700162 tm->tm_sec = bin2bcd(tm->tm_sec);
163 tm->tm_min = bin2bcd(tm->tm_min);
164 tm->tm_hour = bin2bcd(tm->tm_hour);
165 tm->tm_mday = bin2bcd(tm->tm_mday);
David Brownelldb68b182006-12-06 20:38:36 -0800166
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700167 tm->tm_mon = bin2bcd(tm->tm_mon + 1);
David Brownelldb68b182006-12-06 20:38:36 -0800168
169 /* epoch == 1900 */
170 if (tm->tm_year < 100 || tm->tm_year > 199)
171 return -EINVAL;
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700172 tm->tm_year = bin2bcd(tm->tm_year - 100);
David Brownelldb68b182006-12-06 20:38:36 -0800173
174 return 0;
175}
176
177static void bcd2tm(struct rtc_time *tm)
178{
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700179 tm->tm_sec = bcd2bin(tm->tm_sec);
180 tm->tm_min = bcd2bin(tm->tm_min);
181 tm->tm_hour = bcd2bin(tm->tm_hour);
182 tm->tm_mday = bcd2bin(tm->tm_mday);
183 tm->tm_mon = bcd2bin(tm->tm_mon) - 1;
David Brownelldb68b182006-12-06 20:38:36 -0800184 /* epoch == 1900 */
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700185 tm->tm_year = bcd2bin(tm->tm_year) + 100;
David Brownelldb68b182006-12-06 20:38:36 -0800186}
187
188
189static int omap_rtc_read_time(struct device *dev, struct rtc_time *tm)
190{
191 /* we don't report wday/yday/isdst ... */
192 local_irq_disable();
193 rtc_wait_not_busy();
194
195 tm->tm_sec = rtc_read(OMAP_RTC_SECONDS_REG);
196 tm->tm_min = rtc_read(OMAP_RTC_MINUTES_REG);
197 tm->tm_hour = rtc_read(OMAP_RTC_HOURS_REG);
198 tm->tm_mday = rtc_read(OMAP_RTC_DAYS_REG);
199 tm->tm_mon = rtc_read(OMAP_RTC_MONTHS_REG);
200 tm->tm_year = rtc_read(OMAP_RTC_YEARS_REG);
201
202 local_irq_enable();
203
204 bcd2tm(tm);
205 return 0;
206}
207
208static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm)
209{
210 if (tm2bcd(tm) < 0)
211 return -EINVAL;
212 local_irq_disable();
213 rtc_wait_not_busy();
214
215 rtc_write(tm->tm_year, OMAP_RTC_YEARS_REG);
216 rtc_write(tm->tm_mon, OMAP_RTC_MONTHS_REG);
217 rtc_write(tm->tm_mday, OMAP_RTC_DAYS_REG);
218 rtc_write(tm->tm_hour, OMAP_RTC_HOURS_REG);
219 rtc_write(tm->tm_min, OMAP_RTC_MINUTES_REG);
220 rtc_write(tm->tm_sec, OMAP_RTC_SECONDS_REG);
221
222 local_irq_enable();
223
224 return 0;
225}
226
227static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
228{
229 local_irq_disable();
230 rtc_wait_not_busy();
231
232 alm->time.tm_sec = rtc_read(OMAP_RTC_ALARM_SECONDS_REG);
233 alm->time.tm_min = rtc_read(OMAP_RTC_ALARM_MINUTES_REG);
234 alm->time.tm_hour = rtc_read(OMAP_RTC_ALARM_HOURS_REG);
235 alm->time.tm_mday = rtc_read(OMAP_RTC_ALARM_DAYS_REG);
236 alm->time.tm_mon = rtc_read(OMAP_RTC_ALARM_MONTHS_REG);
237 alm->time.tm_year = rtc_read(OMAP_RTC_ALARM_YEARS_REG);
238
239 local_irq_enable();
240
241 bcd2tm(&alm->time);
David Brownella2db8df2006-12-13 00:35:08 -0800242 alm->enabled = !!(rtc_read(OMAP_RTC_INTERRUPTS_REG)
David Brownelldb68b182006-12-06 20:38:36 -0800243 & OMAP_RTC_INTERRUPTS_IT_ALARM);
David Brownelldb68b182006-12-06 20:38:36 -0800244
245 return 0;
246}
247
248static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
249{
250 u8 reg;
251
David Brownelldb68b182006-12-06 20:38:36 -0800252 if (tm2bcd(&alm->time) < 0)
253 return -EINVAL;
254
255 local_irq_disable();
256 rtc_wait_not_busy();
257
258 rtc_write(alm->time.tm_year, OMAP_RTC_ALARM_YEARS_REG);
259 rtc_write(alm->time.tm_mon, OMAP_RTC_ALARM_MONTHS_REG);
260 rtc_write(alm->time.tm_mday, OMAP_RTC_ALARM_DAYS_REG);
261 rtc_write(alm->time.tm_hour, OMAP_RTC_ALARM_HOURS_REG);
262 rtc_write(alm->time.tm_min, OMAP_RTC_ALARM_MINUTES_REG);
263 rtc_write(alm->time.tm_sec, OMAP_RTC_ALARM_SECONDS_REG);
264
265 reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
266 if (alm->enabled)
267 reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
268 else
269 reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
270 rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
271
272 local_irq_enable();
273
274 return 0;
275}
276
277static struct rtc_class_ops omap_rtc_ops = {
David Brownelldb68b182006-12-06 20:38:36 -0800278 .read_time = omap_rtc_read_time,
279 .set_time = omap_rtc_set_time,
280 .read_alarm = omap_rtc_read_alarm,
281 .set_alarm = omap_rtc_set_alarm,
John Stultz16380c12011-02-02 17:02:41 -0800282 .alarm_irq_enable = omap_rtc_alarm_irq_enable,
David Brownelldb68b182006-12-06 20:38:36 -0800283};
284
285static int omap_rtc_alarm;
286static int omap_rtc_timer;
287
David Brownell71fc8222008-07-23 21:30:38 -0700288static int __init omap_rtc_probe(struct platform_device *pdev)
David Brownelldb68b182006-12-06 20:38:36 -0800289{
290 struct resource *res, *mem;
291 struct rtc_device *rtc;
292 u8 reg, new_ctrl;
293
294 omap_rtc_timer = platform_get_irq(pdev, 0);
295 if (omap_rtc_timer <= 0) {
296 pr_debug("%s: no update irq?\n", pdev->name);
297 return -ENOENT;
298 }
299
300 omap_rtc_alarm = platform_get_irq(pdev, 1);
301 if (omap_rtc_alarm <= 0) {
302 pr_debug("%s: no alarm irq?\n", pdev->name);
303 return -ENOENT;
304 }
305
David Brownelldb68b182006-12-06 20:38:36 -0800306 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800307 if (!res) {
308 pr_debug("%s: RTC resource data missing\n", pdev->name);
David Brownelldb68b182006-12-06 20:38:36 -0800309 return -ENOENT;
310 }
311
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800312 mem = request_mem_region(res->start, resource_size(res), pdev->name);
David Brownelldb68b182006-12-06 20:38:36 -0800313 if (!mem) {
314 pr_debug("%s: RTC registers at %08x are not free\n",
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800315 pdev->name, res->start);
David Brownelldb68b182006-12-06 20:38:36 -0800316 return -EBUSY;
317 }
318
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800319 rtc_base = ioremap(res->start, resource_size(res));
320 if (!rtc_base) {
321 pr_debug("%s: RTC registers can't be mapped\n", pdev->name);
322 goto fail;
323 }
324
David Brownelldb68b182006-12-06 20:38:36 -0800325 rtc = rtc_device_register(pdev->name, &pdev->dev,
326 &omap_rtc_ops, THIS_MODULE);
327 if (IS_ERR(rtc)) {
328 pr_debug("%s: can't register RTC device, err %ld\n",
329 pdev->name, PTR_ERR(rtc));
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800330 goto fail0;
David Brownelldb68b182006-12-06 20:38:36 -0800331 }
332 platform_set_drvdata(pdev, rtc);
David Brownell558a40f2007-05-16 22:11:14 -0700333 dev_set_drvdata(&rtc->dev, mem);
David Brownelldb68b182006-12-06 20:38:36 -0800334
335 /* clear pending irqs, and set 1/second periodic,
336 * which we'll use instead of update irqs
337 */
338 rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
339
340 /* clear old status */
341 reg = rtc_read(OMAP_RTC_STATUS_REG);
342 if (reg & (u8) OMAP_RTC_STATUS_POWER_UP) {
343 pr_info("%s: RTC power up reset detected\n",
344 pdev->name);
345 rtc_write(OMAP_RTC_STATUS_POWER_UP, OMAP_RTC_STATUS_REG);
346 }
347 if (reg & (u8) OMAP_RTC_STATUS_ALARM)
348 rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
349
350 /* handle periodic and alarm irqs */
Thomas Gleixner38515e92007-02-14 00:33:16 -0800351 if (request_irq(omap_rtc_timer, rtc_irq, IRQF_DISABLED,
Kay Sievers744bcb12009-03-24 16:38:22 -0700352 dev_name(&rtc->dev), rtc)) {
David Brownelldb68b182006-12-06 20:38:36 -0800353 pr_debug("%s: RTC timer interrupt IRQ%d already claimed\n",
354 pdev->name, omap_rtc_timer);
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800355 goto fail1;
David Brownelldb68b182006-12-06 20:38:36 -0800356 }
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800357 if ((omap_rtc_timer != omap_rtc_alarm) &&
358 (request_irq(omap_rtc_alarm, rtc_irq, IRQF_DISABLED,
359 dev_name(&rtc->dev), rtc))) {
David Brownelldb68b182006-12-06 20:38:36 -0800360 pr_debug("%s: RTC alarm interrupt IRQ%d already claimed\n",
361 pdev->name, omap_rtc_alarm);
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800362 goto fail2;
David Brownelldb68b182006-12-06 20:38:36 -0800363 }
364
365 /* On boards with split power, RTC_ON_NOFF won't reset the RTC */
366 reg = rtc_read(OMAP_RTC_CTRL_REG);
367 if (reg & (u8) OMAP_RTC_CTRL_STOP)
368 pr_info("%s: already running\n", pdev->name);
369
370 /* force to 24 hour mode */
Daniel Glöckner12b3e032011-08-03 16:21:02 -0700371 new_ctrl = reg & (OMAP_RTC_CTRL_SPLIT|OMAP_RTC_CTRL_AUTO_COMP);
David Brownelldb68b182006-12-06 20:38:36 -0800372 new_ctrl |= OMAP_RTC_CTRL_STOP;
373
374 /* BOARD-SPECIFIC CUSTOMIZATION CAN GO HERE:
375 *
Sekhar Norifa5b0782010-10-27 15:33:05 -0700376 * - Device wake-up capability setting should come through chip
377 * init logic. OMAP1 boards should initialize the "wakeup capable"
378 * flag in the platform device if the board is wired right for
379 * being woken up by RTC alarm. For OMAP-L138, this capability
380 * is built into the SoC by the "Deep Sleep" capability.
David Brownelldb68b182006-12-06 20:38:36 -0800381 *
382 * - Boards wired so RTC_ON_nOFF is used as the reset signal,
383 * rather than nPWRON_RESET, should forcibly enable split
384 * power mode. (Some chip errata report that RTC_CTRL_SPLIT
385 * is write-only, and always reads as zero...)
386 */
David Brownelldb68b182006-12-06 20:38:36 -0800387
388 if (new_ctrl & (u8) OMAP_RTC_CTRL_SPLIT)
389 pr_info("%s: split power mode\n", pdev->name);
390
391 if (reg != new_ctrl)
392 rtc_write(new_ctrl, OMAP_RTC_CTRL_REG);
393
394 return 0;
395
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800396fail2:
Axel Lin2dd93c42011-04-17 10:02:58 +0800397 free_irq(omap_rtc_timer, rtc);
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800398fail1:
David Brownelldb68b182006-12-06 20:38:36 -0800399 rtc_device_unregister(rtc);
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800400fail0:
401 iounmap(rtc_base);
David Brownelldb68b182006-12-06 20:38:36 -0800402fail:
Axel Lin19412ce2011-01-12 17:00:05 -0800403 release_mem_region(mem->start, resource_size(mem));
David Brownelldb68b182006-12-06 20:38:36 -0800404 return -EIO;
405}
406
David Brownell71fc8222008-07-23 21:30:38 -0700407static int __exit omap_rtc_remove(struct platform_device *pdev)
David Brownelldb68b182006-12-06 20:38:36 -0800408{
Joe Perchesa419aef2009-08-18 11:18:35 -0700409 struct rtc_device *rtc = platform_get_drvdata(pdev);
Axel Lin19412ce2011-01-12 17:00:05 -0800410 struct resource *mem = dev_get_drvdata(&rtc->dev);
David Brownelldb68b182006-12-06 20:38:36 -0800411
412 device_init_wakeup(&pdev->dev, 0);
413
414 /* leave rtc running, but disable irqs */
415 rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
416
417 free_irq(omap_rtc_timer, rtc);
Mark A. Greer8cfde8c2009-12-15 16:46:11 -0800418
419 if (omap_rtc_timer != omap_rtc_alarm)
420 free_irq(omap_rtc_alarm, rtc);
David Brownelldb68b182006-12-06 20:38:36 -0800421
David Brownelldb68b182006-12-06 20:38:36 -0800422 rtc_device_unregister(rtc);
Axel Lin19412ce2011-01-12 17:00:05 -0800423 iounmap(rtc_base);
424 release_mem_region(mem->start, resource_size(mem));
David Brownelldb68b182006-12-06 20:38:36 -0800425 return 0;
426}
427
428#ifdef CONFIG_PM
429
David Brownelldb68b182006-12-06 20:38:36 -0800430static u8 irqstat;
431
432static int omap_rtc_suspend(struct platform_device *pdev, pm_message_t state)
433{
David Brownelldb68b182006-12-06 20:38:36 -0800434 irqstat = rtc_read(OMAP_RTC_INTERRUPTS_REG);
435
436 /* FIXME the RTC alarm is not currently acting as a wakeup event
437 * source, and in fact this enable() call is just saving a flag
438 * that's never used...
439 */
440 if (device_may_wakeup(&pdev->dev))
441 enable_irq_wake(omap_rtc_alarm);
442 else
443 rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
444
445 return 0;
446}
447
448static int omap_rtc_resume(struct platform_device *pdev)
449{
David Brownelldb68b182006-12-06 20:38:36 -0800450 if (device_may_wakeup(&pdev->dev))
451 disable_irq_wake(omap_rtc_alarm);
452 else
453 rtc_write(irqstat, OMAP_RTC_INTERRUPTS_REG);
454 return 0;
455}
456
457#else
458#define omap_rtc_suspend NULL
459#define omap_rtc_resume NULL
460#endif
461
462static void omap_rtc_shutdown(struct platform_device *pdev)
463{
464 rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
465}
466
Kay Sieversad28a072008-04-10 21:29:25 -0700467MODULE_ALIAS("platform:omap_rtc");
David Brownelldb68b182006-12-06 20:38:36 -0800468static struct platform_driver omap_rtc_driver = {
David Brownell71fc8222008-07-23 21:30:38 -0700469 .remove = __exit_p(omap_rtc_remove),
David Brownelldb68b182006-12-06 20:38:36 -0800470 .suspend = omap_rtc_suspend,
471 .resume = omap_rtc_resume,
472 .shutdown = omap_rtc_shutdown,
473 .driver = {
474 .name = "omap_rtc",
475 .owner = THIS_MODULE,
476 },
477};
478
479static int __init rtc_init(void)
480{
David Brownell71fc8222008-07-23 21:30:38 -0700481 return platform_driver_probe(&omap_rtc_driver, omap_rtc_probe);
David Brownelldb68b182006-12-06 20:38:36 -0800482}
483module_init(rtc_init);
484
485static void __exit rtc_exit(void)
486{
487 platform_driver_unregister(&omap_rtc_driver);
488}
489module_exit(rtc_exit);
490
491MODULE_AUTHOR("George G. Davis (and others)");
492MODULE_LICENSE("GPL");