blob: 7029c8016dd5e1d325dca6f3a48efe1e5872d64a [file] [log] [blame]
Andrew Victor788b1fc2006-06-25 05:48:27 -07001/*
2 * Real Time Clock interface for Linux on Atmel AT91RM9200
3 *
4 * Copyright (C) 2002 Rick Bronson
5 *
6 * Converted to RTC class model by Andrew Victor
7 *
8 * Ported to Linux 2.6 by Steven Scholz
9 * Based on s3c2410-rtc.c Simtec Electronics
10 *
11 * Based on sa1100-rtc.c by Nils Faerber
12 * Based on rtc.c by Paul Gortmaker
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version
17 * 2 of the License, or (at your option) any later version.
18 *
19 */
20
21#include <linux/module.h>
22#include <linux/kernel.h>
23#include <linux/platform_device.h>
24#include <linux/time.h>
25#include <linux/rtc.h>
26#include <linux/bcd.h>
27#include <linux/interrupt.h>
28#include <linux/ioctl.h>
29#include <linux/completion.h>
30
31#include <asm/uaccess.h>
Andrew Victorfb0d4ec2008-10-15 22:03:08 -070032
Russell Kinga09e64f2008-08-05 16:14:15 +010033#include <mach/at91_rtc.h>
David Brownelld73e3cd2007-01-05 16:36:25 -080034
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +080035#define at91_rtc_read(field) \
36 __raw_readl(at91_rtc_regs + field)
37#define at91_rtc_write(field, val) \
38 __raw_writel((val), at91_rtc_regs + field)
Andrew Victor788b1fc2006-06-25 05:48:27 -070039
Andrew Victor788b1fc2006-06-25 05:48:27 -070040#define AT91_RTC_EPOCH 1900UL /* just like arch/arm/common/rtctime.c */
41
42static DECLARE_COMPLETION(at91_rtc_updated);
43static unsigned int at91_alarm_year = AT91_RTC_EPOCH;
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +080044static void __iomem *at91_rtc_regs;
45static int irq;
Andrew Victor788b1fc2006-06-25 05:48:27 -070046
Andrew Victor788b1fc2006-06-25 05:48:27 -070047/*
48 * Decode time/date into rtc_time structure
49 */
Andrew Mortone7a8bb12006-06-25 05:48:27 -070050static void at91_rtc_decodetime(unsigned int timereg, unsigned int calreg,
51 struct rtc_time *tm)
Andrew Victor788b1fc2006-06-25 05:48:27 -070052{
53 unsigned int time, date;
54
55 /* must read twice in case it changes */
56 do {
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +080057 time = at91_rtc_read(timereg);
58 date = at91_rtc_read(calreg);
59 } while ((time != at91_rtc_read(timereg)) ||
60 (date != at91_rtc_read(calreg)));
Andrew Victor788b1fc2006-06-25 05:48:27 -070061
Adrian Bunkfe20ba72008-10-18 20:28:41 -070062 tm->tm_sec = bcd2bin((time & AT91_RTC_SEC) >> 0);
63 tm->tm_min = bcd2bin((time & AT91_RTC_MIN) >> 8);
64 tm->tm_hour = bcd2bin((time & AT91_RTC_HOUR) >> 16);
Andrew Victor788b1fc2006-06-25 05:48:27 -070065
66 /*
67 * The Calendar Alarm register does not have a field for
68 * the year - so these will return an invalid value. When an
Lucas De Marchi25985ed2011-03-30 22:57:33 -030069 * alarm is set, at91_alarm_year will store the current year.
Andrew Victor788b1fc2006-06-25 05:48:27 -070070 */
Adrian Bunkfe20ba72008-10-18 20:28:41 -070071 tm->tm_year = bcd2bin(date & AT91_RTC_CENT) * 100; /* century */
72 tm->tm_year += bcd2bin((date & AT91_RTC_YEAR) >> 8); /* year */
Andrew Victor788b1fc2006-06-25 05:48:27 -070073
Adrian Bunkfe20ba72008-10-18 20:28:41 -070074 tm->tm_wday = bcd2bin((date & AT91_RTC_DAY) >> 21) - 1; /* day of the week [0-6], Sunday=0 */
75 tm->tm_mon = bcd2bin((date & AT91_RTC_MONTH) >> 16) - 1;
76 tm->tm_mday = bcd2bin((date & AT91_RTC_DATE) >> 24);
Andrew Victor788b1fc2006-06-25 05:48:27 -070077}
78
79/*
80 * Read current time and date in RTC
81 */
82static int at91_rtc_readtime(struct device *dev, struct rtc_time *tm)
83{
84 at91_rtc_decodetime(AT91_RTC_TIMR, AT91_RTC_CALR, tm);
85 tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);
86 tm->tm_year = tm->tm_year - 1900;
87
Harvey Harrison2a4e2b82008-04-28 02:12:00 -070088 pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
Andrew Mortone7a8bb12006-06-25 05:48:27 -070089 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
90 tm->tm_hour, tm->tm_min, tm->tm_sec);
Andrew Victor788b1fc2006-06-25 05:48:27 -070091
92 return 0;
93}
94
95/*
96 * Set current time and date in RTC
97 */
98static int at91_rtc_settime(struct device *dev, struct rtc_time *tm)
99{
100 unsigned long cr;
101
Harvey Harrison2a4e2b82008-04-28 02:12:00 -0700102 pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700103 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
104 tm->tm_hour, tm->tm_min, tm->tm_sec);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700105
106 /* Stop Time/Calendar from counting */
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800107 cr = at91_rtc_read(AT91_RTC_CR);
108 at91_rtc_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700109
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800110 at91_rtc_write(AT91_RTC_IER, AT91_RTC_ACKUPD);
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700111 wait_for_completion(&at91_rtc_updated); /* wait for ACKUPD interrupt */
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800112 at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700113
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800114 at91_rtc_write(AT91_RTC_TIMR,
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700115 bin2bcd(tm->tm_sec) << 0
116 | bin2bcd(tm->tm_min) << 8
117 | bin2bcd(tm->tm_hour) << 16);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700118
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800119 at91_rtc_write(AT91_RTC_CALR,
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700120 bin2bcd((tm->tm_year + 1900) / 100) /* century */
121 | bin2bcd(tm->tm_year % 100) << 8 /* year */
122 | bin2bcd(tm->tm_mon + 1) << 16 /* tm_mon starts at zero */
123 | bin2bcd(tm->tm_wday + 1) << 21 /* day of the week [0-6], Sunday=0 */
124 | bin2bcd(tm->tm_mday) << 24);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700125
126 /* Restart Time/Calendar */
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800127 cr = at91_rtc_read(AT91_RTC_CR);
128 at91_rtc_write(AT91_RTC_CR, cr & ~(AT91_RTC_UPDCAL | AT91_RTC_UPDTIM));
Andrew Victor788b1fc2006-06-25 05:48:27 -0700129
130 return 0;
131}
132
133/*
134 * Read alarm time and date in RTC
135 */
136static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
137{
138 struct rtc_time *tm = &alrm->time;
139
140 at91_rtc_decodetime(AT91_RTC_TIMALR, AT91_RTC_CALALR, tm);
141 tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);
142 tm->tm_year = at91_alarm_year - 1900;
143
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800144 alrm->enabled = (at91_rtc_read(AT91_RTC_IMR) & AT91_RTC_ALARM)
David Brownella2db8df2006-12-13 00:35:08 -0800145 ? 1 : 0;
146
Harvey Harrison2a4e2b82008-04-28 02:12:00 -0700147 pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700148 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
149 tm->tm_hour, tm->tm_min, tm->tm_sec);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700150
151 return 0;
152}
153
154/*
155 * Set alarm time and date in RTC
156 */
157static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
158{
159 struct rtc_time tm;
160
161 at91_rtc_decodetime(AT91_RTC_TIMR, AT91_RTC_CALR, &tm);
162
163 at91_alarm_year = tm.tm_year;
164
Linus Pizunski00ee5c82013-12-12 17:12:23 -0800165 tm.tm_mon = alrm->time.tm_mon;
166 tm.tm_mday = alrm->time.tm_mday;
Andrew Victor788b1fc2006-06-25 05:48:27 -0700167 tm.tm_hour = alrm->time.tm_hour;
168 tm.tm_min = alrm->time.tm_min;
169 tm.tm_sec = alrm->time.tm_sec;
170
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800171 at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ALARM);
172 at91_rtc_write(AT91_RTC_TIMALR,
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700173 bin2bcd(tm.tm_sec) << 0
174 | bin2bcd(tm.tm_min) << 8
175 | bin2bcd(tm.tm_hour) << 16
Andrew Victor788b1fc2006-06-25 05:48:27 -0700176 | AT91_RTC_HOUREN | AT91_RTC_MINEN | AT91_RTC_SECEN);
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800177 at91_rtc_write(AT91_RTC_CALALR,
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700178 bin2bcd(tm.tm_mon + 1) << 16 /* tm_mon starts at zero */
179 | bin2bcd(tm.tm_mday) << 24
Andrew Victor788b1fc2006-06-25 05:48:27 -0700180 | AT91_RTC_DATEEN | AT91_RTC_MTHEN);
181
David Brownell449321b2008-07-23 21:30:46 -0700182 if (alrm->enabled) {
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800183 at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
184 at91_rtc_write(AT91_RTC_IER, AT91_RTC_ALARM);
David Brownell449321b2008-07-23 21:30:46 -0700185 }
David Brownell5d4675a2007-02-20 13:58:14 -0800186
Harvey Harrison2a4e2b82008-04-28 02:12:00 -0700187 pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700188 at91_alarm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour,
189 tm.tm_min, tm.tm_sec);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700190
191 return 0;
192}
193
John Stultz16380c12011-02-02 17:02:41 -0800194static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
195{
196 pr_debug("%s(): cmd=%08x\n", __func__, enabled);
197
198 if (enabled) {
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800199 at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
200 at91_rtc_write(AT91_RTC_IER, AT91_RTC_ALARM);
John Stultz16380c12011-02-02 17:02:41 -0800201 } else
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800202 at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ALARM);
John Stultz16380c12011-02-02 17:02:41 -0800203
204 return 0;
205}
Andrew Victor788b1fc2006-06-25 05:48:27 -0700206/*
207 * Provide additional RTC information in /proc/driver/rtc
208 */
209static int at91_rtc_proc(struct device *dev, struct seq_file *seq)
210{
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800211 unsigned long imr = at91_rtc_read(AT91_RTC_IMR);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700212
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700213 seq_printf(seq, "update_IRQ\t: %s\n",
214 (imr & AT91_RTC_ACKUPD) ? "yes" : "no");
215 seq_printf(seq, "periodic_IRQ\t: %s\n",
216 (imr & AT91_RTC_SECEV) ? "yes" : "no");
Andrew Victor788b1fc2006-06-25 05:48:27 -0700217
218 return 0;
219}
220
221/*
222 * IRQ handler for the RTC
223 */
David Howells7d12e782006-10-05 14:55:46 +0100224static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id)
Andrew Victor788b1fc2006-06-25 05:48:27 -0700225{
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700226 struct platform_device *pdev = dev_id;
Andrew Victor788b1fc2006-06-25 05:48:27 -0700227 struct rtc_device *rtc = platform_get_drvdata(pdev);
228 unsigned int rtsr;
229 unsigned long events = 0;
230
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800231 rtsr = at91_rtc_read(AT91_RTC_SR) & at91_rtc_read(AT91_RTC_IMR);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700232 if (rtsr) { /* this interrupt is shared! Is it ours? */
233 if (rtsr & AT91_RTC_ALARM)
234 events |= (RTC_AF | RTC_IRQF);
235 if (rtsr & AT91_RTC_SECEV)
236 events |= (RTC_UF | RTC_IRQF);
237 if (rtsr & AT91_RTC_ACKUPD)
238 complete(&at91_rtc_updated);
239
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800240 at91_rtc_write(AT91_RTC_SCCR, rtsr); /* clear status reg */
Andrew Victor788b1fc2006-06-25 05:48:27 -0700241
David Brownellab6a2d72007-05-08 00:33:30 -0700242 rtc_update_irq(rtc, 1, events);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700243
Harvey Harrison2a4e2b82008-04-28 02:12:00 -0700244 pr_debug("%s(): num=%ld, events=0x%02lx\n", __func__,
Andrew Victor788b1fc2006-06-25 05:48:27 -0700245 events >> 8, events & 0x000000FF);
246
247 return IRQ_HANDLED;
248 }
249 return IRQ_NONE; /* not handled */
250}
251
David Brownellff8371a2006-09-30 23:28:17 -0700252static const struct rtc_class_ops at91_rtc_ops = {
Andrew Victor788b1fc2006-06-25 05:48:27 -0700253 .read_time = at91_rtc_readtime,
254 .set_time = at91_rtc_settime,
255 .read_alarm = at91_rtc_readalarm,
256 .set_alarm = at91_rtc_setalarm,
257 .proc = at91_rtc_proc,
John Stultz16380c12011-02-02 17:02:41 -0800258 .alarm_irq_enable = at91_rtc_alarm_irq_enable,
Andrew Victor788b1fc2006-06-25 05:48:27 -0700259};
260
261/*
262 * Initialize and install RTC driver
263 */
264static int __init at91_rtc_probe(struct platform_device *pdev)
265{
266 struct rtc_device *rtc;
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800267 struct resource *regs;
268 int ret = 0;
Andrew Victor788b1fc2006-06-25 05:48:27 -0700269
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800270 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
271 if (!regs) {
272 dev_err(&pdev->dev, "no mmio resource defined\n");
273 return -ENXIO;
274 }
275
276 irq = platform_get_irq(pdev, 0);
277 if (irq < 0) {
278 dev_err(&pdev->dev, "no irq resource defined\n");
279 return -ENXIO;
280 }
281
282 at91_rtc_regs = ioremap(regs->start, resource_size(regs));
283 if (!at91_rtc_regs) {
284 dev_err(&pdev->dev, "failed to map registers, aborting.\n");
285 return -ENOMEM;
286 }
287
288 at91_rtc_write(AT91_RTC_CR, 0);
289 at91_rtc_write(AT91_RTC_MR, 0); /* 24 hour mode */
Andrew Victor788b1fc2006-06-25 05:48:27 -0700290
291 /* Disable all interrupts */
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800292 at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM |
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700293 AT91_RTC_SECEV | AT91_RTC_TIMEV |
294 AT91_RTC_CALEV);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700295
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800296 ret = request_irq(irq, at91_rtc_interrupt,
David Brownelldac94d92009-09-22 16:46:31 -0700297 IRQF_SHARED,
David Brownelld728b1e2006-11-25 11:09:28 -0800298 "at91_rtc", pdev);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700299 if (ret) {
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700300 printk(KERN_ERR "at91_rtc: IRQ %d already in use.\n",
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800301 irq);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700302 return ret;
303 }
304
David Brownell5d4675a2007-02-20 13:58:14 -0800305 /* cpu init code should really have flagged this device as
306 * being wake-capable; if it didn't, do that here.
307 */
308 if (!device_can_wakeup(&pdev->dev))
309 device_init_wakeup(&pdev->dev, 1);
310
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700311 rtc = rtc_device_register(pdev->name, &pdev->dev,
312 &at91_rtc_ops, THIS_MODULE);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700313 if (IS_ERR(rtc)) {
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800314 free_irq(irq, pdev);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700315 return PTR_ERR(rtc);
316 }
317 platform_set_drvdata(pdev, rtc);
318
319 printk(KERN_INFO "AT91 Real Time Clock driver.\n");
320 return 0;
321}
322
323/*
324 * Disable and remove the RTC driver
325 */
David Brownell5d4675a2007-02-20 13:58:14 -0800326static int __exit at91_rtc_remove(struct platform_device *pdev)
Andrew Victor788b1fc2006-06-25 05:48:27 -0700327{
328 struct rtc_device *rtc = platform_get_drvdata(pdev);
329
330 /* Disable all interrupts */
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800331 at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM |
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700332 AT91_RTC_SECEV | AT91_RTC_TIMEV |
333 AT91_RTC_CALEV);
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800334 free_irq(irq, pdev);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700335
336 rtc_device_unregister(rtc);
337 platform_set_drvdata(pdev, NULL);
338
339 return 0;
340}
341
342#ifdef CONFIG_PM
343
344/* AT91RM9200 RTC Power management control */
345
David Brownell90b4d642006-09-30 23:28:17 -0700346static u32 at91_rtc_imr;
Andrew Victor788b1fc2006-06-25 05:48:27 -0700347
David Brownelldac94d92009-09-22 16:46:31 -0700348static int at91_rtc_suspend(struct device *dev)
Andrew Victor788b1fc2006-06-25 05:48:27 -0700349{
David Brownell90b4d642006-09-30 23:28:17 -0700350 /* this IRQ is shared with DBGU and other hardware which isn't
351 * necessarily doing PM like we are...
352 */
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800353 at91_rtc_imr = at91_rtc_read(AT91_RTC_IMR)
David Brownell90b4d642006-09-30 23:28:17 -0700354 & (AT91_RTC_ALARM|AT91_RTC_SECEV);
355 if (at91_rtc_imr) {
David Brownelldac94d92009-09-22 16:46:31 -0700356 if (device_may_wakeup(dev))
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800357 enable_irq_wake(irq);
David Brownell90b4d642006-09-30 23:28:17 -0700358 else
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800359 at91_rtc_write(AT91_RTC_IDR, at91_rtc_imr);
David Brownell90b4d642006-09-30 23:28:17 -0700360 }
Andrew Victor788b1fc2006-06-25 05:48:27 -0700361 return 0;
362}
363
David Brownelldac94d92009-09-22 16:46:31 -0700364static int at91_rtc_resume(struct device *dev)
Andrew Victor788b1fc2006-06-25 05:48:27 -0700365{
David Brownell90b4d642006-09-30 23:28:17 -0700366 if (at91_rtc_imr) {
David Brownelldac94d92009-09-22 16:46:31 -0700367 if (device_may_wakeup(dev))
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800368 disable_irq_wake(irq);
David Brownell90b4d642006-09-30 23:28:17 -0700369 else
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800370 at91_rtc_write(AT91_RTC_IER, at91_rtc_imr);
David Brownell90b4d642006-09-30 23:28:17 -0700371 }
Andrew Victor788b1fc2006-06-25 05:48:27 -0700372 return 0;
373}
David Brownelldac94d92009-09-22 16:46:31 -0700374
375static const struct dev_pm_ops at91_rtc_pm = {
376 .suspend = at91_rtc_suspend,
377 .resume = at91_rtc_resume,
378};
379
380#define at91_rtc_pm_ptr &at91_rtc_pm
381
Andrew Victor788b1fc2006-06-25 05:48:27 -0700382#else
David Brownelldac94d92009-09-22 16:46:31 -0700383#define at91_rtc_pm_ptr NULL
Andrew Victor788b1fc2006-06-25 05:48:27 -0700384#endif
385
386static struct platform_driver at91_rtc_driver = {
David Brownell5d4675a2007-02-20 13:58:14 -0800387 .remove = __exit_p(at91_rtc_remove),
Andrew Victor788b1fc2006-06-25 05:48:27 -0700388 .driver = {
389 .name = "at91_rtc",
390 .owner = THIS_MODULE,
David Brownelldac94d92009-09-22 16:46:31 -0700391 .pm = at91_rtc_pm_ptr,
Andrew Victor788b1fc2006-06-25 05:48:27 -0700392 },
393};
394
395static int __init at91_rtc_init(void)
396{
David Brownell5d4675a2007-02-20 13:58:14 -0800397 return platform_driver_probe(&at91_rtc_driver, at91_rtc_probe);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700398}
399
400static void __exit at91_rtc_exit(void)
401{
402 platform_driver_unregister(&at91_rtc_driver);
403}
404
Andrew Victor788b1fc2006-06-25 05:48:27 -0700405module_init(at91_rtc_init);
406module_exit(at91_rtc_exit);
407
408MODULE_AUTHOR("Rick Bronson");
409MODULE_DESCRIPTION("RTC driver for Atmel AT91RM9200");
410MODULE_LICENSE("GPL");
Kay Sieversad28a072008-04-10 21:29:25 -0700411MODULE_ALIAS("platform:at91_rtc");