blob: b6469e2cae897b0a8fbc503ae88e9e2c53a74fee [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>
Arnd Bergmann14070ad2012-07-04 07:45:16 +000030#include <linux/io.h>
Andrew Victor788b1fc2006-06-25 05:48:27 -070031
32#include <asm/uaccess.h>
Andrew Victorfb0d4ec2008-10-15 22:03:08 -070033
Jean-Christophe PLAGNIOL-VILLARD75984df2012-10-30 08:03:39 +080034#include "rtc-at91rm9200.h"
David Brownelld73e3cd2007-01-05 16:36:25 -080035
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +080036#define at91_rtc_read(field) \
37 __raw_readl(at91_rtc_regs + field)
38#define at91_rtc_write(field, val) \
39 __raw_writel((val), at91_rtc_regs + field)
Andrew Victor788b1fc2006-06-25 05:48:27 -070040
Andrew Victor788b1fc2006-06-25 05:48:27 -070041#define AT91_RTC_EPOCH 1900UL /* just like arch/arm/common/rtctime.c */
42
43static DECLARE_COMPLETION(at91_rtc_updated);
44static unsigned int at91_alarm_year = AT91_RTC_EPOCH;
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +080045static void __iomem *at91_rtc_regs;
46static int irq;
Andrew Victor788b1fc2006-06-25 05:48:27 -070047
Andrew Victor788b1fc2006-06-25 05:48:27 -070048/*
49 * Decode time/date into rtc_time structure
50 */
Andrew Mortone7a8bb12006-06-25 05:48:27 -070051static void at91_rtc_decodetime(unsigned int timereg, unsigned int calreg,
52 struct rtc_time *tm)
Andrew Victor788b1fc2006-06-25 05:48:27 -070053{
54 unsigned int time, date;
55
56 /* must read twice in case it changes */
57 do {
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +080058 time = at91_rtc_read(timereg);
59 date = at91_rtc_read(calreg);
60 } while ((time != at91_rtc_read(timereg)) ||
61 (date != at91_rtc_read(calreg)));
Andrew Victor788b1fc2006-06-25 05:48:27 -070062
Adrian Bunkfe20ba72008-10-18 20:28:41 -070063 tm->tm_sec = bcd2bin((time & AT91_RTC_SEC) >> 0);
64 tm->tm_min = bcd2bin((time & AT91_RTC_MIN) >> 8);
65 tm->tm_hour = bcd2bin((time & AT91_RTC_HOUR) >> 16);
Andrew Victor788b1fc2006-06-25 05:48:27 -070066
67 /*
68 * The Calendar Alarm register does not have a field for
69 * the year - so these will return an invalid value. When an
Lucas De Marchi25985ed2011-03-30 22:57:33 -030070 * alarm is set, at91_alarm_year will store the current year.
Andrew Victor788b1fc2006-06-25 05:48:27 -070071 */
Adrian Bunkfe20ba72008-10-18 20:28:41 -070072 tm->tm_year = bcd2bin(date & AT91_RTC_CENT) * 100; /* century */
73 tm->tm_year += bcd2bin((date & AT91_RTC_YEAR) >> 8); /* year */
Andrew Victor788b1fc2006-06-25 05:48:27 -070074
Adrian Bunkfe20ba72008-10-18 20:28:41 -070075 tm->tm_wday = bcd2bin((date & AT91_RTC_DAY) >> 21) - 1; /* day of the week [0-6], Sunday=0 */
76 tm->tm_mon = bcd2bin((date & AT91_RTC_MONTH) >> 16) - 1;
77 tm->tm_mday = bcd2bin((date & AT91_RTC_DATE) >> 24);
Andrew Victor788b1fc2006-06-25 05:48:27 -070078}
79
80/*
81 * Read current time and date in RTC
82 */
83static int at91_rtc_readtime(struct device *dev, struct rtc_time *tm)
84{
85 at91_rtc_decodetime(AT91_RTC_TIMR, AT91_RTC_CALR, tm);
86 tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);
87 tm->tm_year = tm->tm_year - 1900;
88
Harvey Harrison2a4e2b82008-04-28 02:12:00 -070089 pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
Andrew Mortone7a8bb12006-06-25 05:48:27 -070090 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
91 tm->tm_hour, tm->tm_min, tm->tm_sec);
Andrew Victor788b1fc2006-06-25 05:48:27 -070092
93 return 0;
94}
95
96/*
97 * Set current time and date in RTC
98 */
99static int at91_rtc_settime(struct device *dev, struct rtc_time *tm)
100{
101 unsigned long cr;
102
Harvey Harrison2a4e2b82008-04-28 02:12:00 -0700103 pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700104 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
105 tm->tm_hour, tm->tm_min, tm->tm_sec);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700106
107 /* Stop Time/Calendar from counting */
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800108 cr = at91_rtc_read(AT91_RTC_CR);
109 at91_rtc_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700110
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800111 at91_rtc_write(AT91_RTC_IER, AT91_RTC_ACKUPD);
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700112 wait_for_completion(&at91_rtc_updated); /* wait for ACKUPD interrupt */
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800113 at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700114
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800115 at91_rtc_write(AT91_RTC_TIMR,
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700116 bin2bcd(tm->tm_sec) << 0
117 | bin2bcd(tm->tm_min) << 8
118 | bin2bcd(tm->tm_hour) << 16);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700119
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800120 at91_rtc_write(AT91_RTC_CALR,
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700121 bin2bcd((tm->tm_year + 1900) / 100) /* century */
122 | bin2bcd(tm->tm_year % 100) << 8 /* year */
123 | bin2bcd(tm->tm_mon + 1) << 16 /* tm_mon starts at zero */
124 | bin2bcd(tm->tm_wday + 1) << 21 /* day of the week [0-6], Sunday=0 */
125 | bin2bcd(tm->tm_mday) << 24);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700126
127 /* Restart Time/Calendar */
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800128 cr = at91_rtc_read(AT91_RTC_CR);
129 at91_rtc_write(AT91_RTC_CR, cr & ~(AT91_RTC_UPDCAL | AT91_RTC_UPDTIM));
Andrew Victor788b1fc2006-06-25 05:48:27 -0700130
131 return 0;
132}
133
134/*
135 * Read alarm time and date in RTC
136 */
137static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
138{
139 struct rtc_time *tm = &alrm->time;
140
141 at91_rtc_decodetime(AT91_RTC_TIMALR, AT91_RTC_CALALR, tm);
142 tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);
143 tm->tm_year = at91_alarm_year - 1900;
144
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800145 alrm->enabled = (at91_rtc_read(AT91_RTC_IMR) & AT91_RTC_ALARM)
David Brownella2db8df2006-12-13 00:35:08 -0800146 ? 1 : 0;
147
Harvey Harrison2a4e2b82008-04-28 02:12:00 -0700148 pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700149 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
150 tm->tm_hour, tm->tm_min, tm->tm_sec);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700151
152 return 0;
153}
154
155/*
156 * Set alarm time and date in RTC
157 */
158static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
159{
160 struct rtc_time tm;
161
162 at91_rtc_decodetime(AT91_RTC_TIMR, AT91_RTC_CALR, &tm);
163
164 at91_alarm_year = tm.tm_year;
165
166 tm.tm_hour = alrm->time.tm_hour;
167 tm.tm_min = alrm->time.tm_min;
168 tm.tm_sec = alrm->time.tm_sec;
169
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800170 at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ALARM);
171 at91_rtc_write(AT91_RTC_TIMALR,
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700172 bin2bcd(tm.tm_sec) << 0
173 | bin2bcd(tm.tm_min) << 8
174 | bin2bcd(tm.tm_hour) << 16
Andrew Victor788b1fc2006-06-25 05:48:27 -0700175 | AT91_RTC_HOUREN | AT91_RTC_MINEN | AT91_RTC_SECEN);
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800176 at91_rtc_write(AT91_RTC_CALALR,
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700177 bin2bcd(tm.tm_mon + 1) << 16 /* tm_mon starts at zero */
178 | bin2bcd(tm.tm_mday) << 24
Andrew Victor788b1fc2006-06-25 05:48:27 -0700179 | AT91_RTC_DATEEN | AT91_RTC_MTHEN);
180
David Brownell449321b2008-07-23 21:30:46 -0700181 if (alrm->enabled) {
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800182 at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
183 at91_rtc_write(AT91_RTC_IER, AT91_RTC_ALARM);
David Brownell449321b2008-07-23 21:30:46 -0700184 }
David Brownell5d4675a2007-02-20 13:58:14 -0800185
Harvey Harrison2a4e2b82008-04-28 02:12:00 -0700186 pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700187 at91_alarm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour,
188 tm.tm_min, tm.tm_sec);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700189
190 return 0;
191}
192
John Stultz16380c12011-02-02 17:02:41 -0800193static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
194{
195 pr_debug("%s(): cmd=%08x\n", __func__, enabled);
196
197 if (enabled) {
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800198 at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
199 at91_rtc_write(AT91_RTC_IER, AT91_RTC_ALARM);
John Stultz16380c12011-02-02 17:02:41 -0800200 } else
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800201 at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ALARM);
John Stultz16380c12011-02-02 17:02:41 -0800202
203 return 0;
204}
Andrew Victor788b1fc2006-06-25 05:48:27 -0700205/*
206 * Provide additional RTC information in /proc/driver/rtc
207 */
208static int at91_rtc_proc(struct device *dev, struct seq_file *seq)
209{
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800210 unsigned long imr = at91_rtc_read(AT91_RTC_IMR);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700211
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700212 seq_printf(seq, "update_IRQ\t: %s\n",
213 (imr & AT91_RTC_ACKUPD) ? "yes" : "no");
214 seq_printf(seq, "periodic_IRQ\t: %s\n",
215 (imr & AT91_RTC_SECEV) ? "yes" : "no");
Andrew Victor788b1fc2006-06-25 05:48:27 -0700216
217 return 0;
218}
219
220/*
221 * IRQ handler for the RTC
222 */
David Howells7d12e782006-10-05 14:55:46 +0100223static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id)
Andrew Victor788b1fc2006-06-25 05:48:27 -0700224{
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700225 struct platform_device *pdev = dev_id;
Andrew Victor788b1fc2006-06-25 05:48:27 -0700226 struct rtc_device *rtc = platform_get_drvdata(pdev);
227 unsigned int rtsr;
228 unsigned long events = 0;
229
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800230 rtsr = at91_rtc_read(AT91_RTC_SR) & at91_rtc_read(AT91_RTC_IMR);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700231 if (rtsr) { /* this interrupt is shared! Is it ours? */
232 if (rtsr & AT91_RTC_ALARM)
233 events |= (RTC_AF | RTC_IRQF);
234 if (rtsr & AT91_RTC_SECEV)
235 events |= (RTC_UF | RTC_IRQF);
236 if (rtsr & AT91_RTC_ACKUPD)
237 complete(&at91_rtc_updated);
238
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800239 at91_rtc_write(AT91_RTC_SCCR, rtsr); /* clear status reg */
Andrew Victor788b1fc2006-06-25 05:48:27 -0700240
David Brownellab6a2d72007-05-08 00:33:30 -0700241 rtc_update_irq(rtc, 1, events);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700242
Harvey Harrison2a4e2b82008-04-28 02:12:00 -0700243 pr_debug("%s(): num=%ld, events=0x%02lx\n", __func__,
Andrew Victor788b1fc2006-06-25 05:48:27 -0700244 events >> 8, events & 0x000000FF);
245
246 return IRQ_HANDLED;
247 }
248 return IRQ_NONE; /* not handled */
249}
250
David Brownellff8371a2006-09-30 23:28:17 -0700251static const struct rtc_class_ops at91_rtc_ops = {
Andrew Victor788b1fc2006-06-25 05:48:27 -0700252 .read_time = at91_rtc_readtime,
253 .set_time = at91_rtc_settime,
254 .read_alarm = at91_rtc_readalarm,
255 .set_alarm = at91_rtc_setalarm,
256 .proc = at91_rtc_proc,
John Stultz16380c12011-02-02 17:02:41 -0800257 .alarm_irq_enable = at91_rtc_alarm_irq_enable,
Andrew Victor788b1fc2006-06-25 05:48:27 -0700258};
259
260/*
261 * Initialize and install RTC driver
262 */
263static int __init at91_rtc_probe(struct platform_device *pdev)
264{
265 struct rtc_device *rtc;
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800266 struct resource *regs;
267 int ret = 0;
Andrew Victor788b1fc2006-06-25 05:48:27 -0700268
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800269 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
270 if (!regs) {
271 dev_err(&pdev->dev, "no mmio resource defined\n");
272 return -ENXIO;
273 }
274
275 irq = platform_get_irq(pdev, 0);
276 if (irq < 0) {
277 dev_err(&pdev->dev, "no irq resource defined\n");
278 return -ENXIO;
279 }
280
281 at91_rtc_regs = ioremap(regs->start, resource_size(regs));
282 if (!at91_rtc_regs) {
283 dev_err(&pdev->dev, "failed to map registers, aborting.\n");
284 return -ENOMEM;
285 }
286
287 at91_rtc_write(AT91_RTC_CR, 0);
288 at91_rtc_write(AT91_RTC_MR, 0); /* 24 hour mode */
Andrew Victor788b1fc2006-06-25 05:48:27 -0700289
290 /* Disable all interrupts */
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800291 at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM |
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700292 AT91_RTC_SECEV | AT91_RTC_TIMEV |
293 AT91_RTC_CALEV);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700294
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800295 ret = request_irq(irq, at91_rtc_interrupt,
David Brownelldac94d92009-09-22 16:46:31 -0700296 IRQF_SHARED,
David Brownelld728b1e2006-11-25 11:09:28 -0800297 "at91_rtc", pdev);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700298 if (ret) {
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700299 printk(KERN_ERR "at91_rtc: IRQ %d already in use.\n",
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800300 irq);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700301 return ret;
302 }
303
David Brownell5d4675a2007-02-20 13:58:14 -0800304 /* cpu init code should really have flagged this device as
305 * being wake-capable; if it didn't, do that here.
306 */
307 if (!device_can_wakeup(&pdev->dev))
308 device_init_wakeup(&pdev->dev, 1);
309
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700310 rtc = rtc_device_register(pdev->name, &pdev->dev,
311 &at91_rtc_ops, THIS_MODULE);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700312 if (IS_ERR(rtc)) {
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800313 free_irq(irq, pdev);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700314 return PTR_ERR(rtc);
315 }
316 platform_set_drvdata(pdev, rtc);
317
318 printk(KERN_INFO "AT91 Real Time Clock driver.\n");
319 return 0;
320}
321
322/*
323 * Disable and remove the RTC driver
324 */
David Brownell5d4675a2007-02-20 13:58:14 -0800325static int __exit at91_rtc_remove(struct platform_device *pdev)
Andrew Victor788b1fc2006-06-25 05:48:27 -0700326{
327 struct rtc_device *rtc = platform_get_drvdata(pdev);
328
329 /* Disable all interrupts */
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800330 at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM |
Andrew Mortone7a8bb12006-06-25 05:48:27 -0700331 AT91_RTC_SECEV | AT91_RTC_TIMEV |
332 AT91_RTC_CALEV);
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800333 free_irq(irq, pdev);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700334
335 rtc_device_unregister(rtc);
336 platform_set_drvdata(pdev, NULL);
337
338 return 0;
339}
340
341#ifdef CONFIG_PM
342
343/* AT91RM9200 RTC Power management control */
344
David Brownell90b4d642006-09-30 23:28:17 -0700345static u32 at91_rtc_imr;
Andrew Victor788b1fc2006-06-25 05:48:27 -0700346
David Brownelldac94d92009-09-22 16:46:31 -0700347static int at91_rtc_suspend(struct device *dev)
Andrew Victor788b1fc2006-06-25 05:48:27 -0700348{
David Brownell90b4d642006-09-30 23:28:17 -0700349 /* this IRQ is shared with DBGU and other hardware which isn't
350 * necessarily doing PM like we are...
351 */
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800352 at91_rtc_imr = at91_rtc_read(AT91_RTC_IMR)
David Brownell90b4d642006-09-30 23:28:17 -0700353 & (AT91_RTC_ALARM|AT91_RTC_SECEV);
354 if (at91_rtc_imr) {
David Brownelldac94d92009-09-22 16:46:31 -0700355 if (device_may_wakeup(dev))
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800356 enable_irq_wake(irq);
David Brownell90b4d642006-09-30 23:28:17 -0700357 else
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800358 at91_rtc_write(AT91_RTC_IDR, at91_rtc_imr);
David Brownell90b4d642006-09-30 23:28:17 -0700359 }
Andrew Victor788b1fc2006-06-25 05:48:27 -0700360 return 0;
361}
362
David Brownelldac94d92009-09-22 16:46:31 -0700363static int at91_rtc_resume(struct device *dev)
Andrew Victor788b1fc2006-06-25 05:48:27 -0700364{
David Brownell90b4d642006-09-30 23:28:17 -0700365 if (at91_rtc_imr) {
David Brownelldac94d92009-09-22 16:46:31 -0700366 if (device_may_wakeup(dev))
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800367 disable_irq_wake(irq);
David Brownell90b4d642006-09-30 23:28:17 -0700368 else
Jean-Christophe PLAGNIOL-VILLARDd28bdfc2011-11-14 14:24:53 +0800369 at91_rtc_write(AT91_RTC_IER, at91_rtc_imr);
David Brownell90b4d642006-09-30 23:28:17 -0700370 }
Andrew Victor788b1fc2006-06-25 05:48:27 -0700371 return 0;
372}
David Brownelldac94d92009-09-22 16:46:31 -0700373
374static const struct dev_pm_ops at91_rtc_pm = {
375 .suspend = at91_rtc_suspend,
376 .resume = at91_rtc_resume,
377};
378
379#define at91_rtc_pm_ptr &at91_rtc_pm
380
Andrew Victor788b1fc2006-06-25 05:48:27 -0700381#else
David Brownelldac94d92009-09-22 16:46:31 -0700382#define at91_rtc_pm_ptr NULL
Andrew Victor788b1fc2006-06-25 05:48:27 -0700383#endif
384
385static struct platform_driver at91_rtc_driver = {
David Brownell5d4675a2007-02-20 13:58:14 -0800386 .remove = __exit_p(at91_rtc_remove),
Andrew Victor788b1fc2006-06-25 05:48:27 -0700387 .driver = {
388 .name = "at91_rtc",
389 .owner = THIS_MODULE,
David Brownelldac94d92009-09-22 16:46:31 -0700390 .pm = at91_rtc_pm_ptr,
Andrew Victor788b1fc2006-06-25 05:48:27 -0700391 },
392};
393
394static int __init at91_rtc_init(void)
395{
David Brownell5d4675a2007-02-20 13:58:14 -0800396 return platform_driver_probe(&at91_rtc_driver, at91_rtc_probe);
Andrew Victor788b1fc2006-06-25 05:48:27 -0700397}
398
399static void __exit at91_rtc_exit(void)
400{
401 platform_driver_unregister(&at91_rtc_driver);
402}
403
Andrew Victor788b1fc2006-06-25 05:48:27 -0700404module_init(at91_rtc_init);
405module_exit(at91_rtc_exit);
406
407MODULE_AUTHOR("Rick Bronson");
408MODULE_DESCRIPTION("RTC driver for Atmel AT91RM9200");
409MODULE_LICENSE("GPL");
Kay Sieversad28a072008-04-10 21:29:25 -0700410MODULE_ALIAS("platform:at91_rtc");