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Commit | Line | Data |
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788b1fc6 AV |
1 | /* |
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> | |
14070ade | 30 | #include <linux/io.h> |
7c1b68d4 JE |
31 | #include <linux/of.h> |
32 | #include <linux/of_device.h> | |
788b1fc6 AV |
33 | |
34 | #include <asm/uaccess.h> | |
fb0d4ec4 | 35 | |
75984df0 | 36 | #include "rtc-at91rm9200.h" |
d73e3cd7 | 37 | |
d28bdfc5 JCPV |
38 | #define at91_rtc_read(field) \ |
39 | __raw_readl(at91_rtc_regs + field) | |
40 | #define at91_rtc_write(field, val) \ | |
41 | __raw_writel((val), at91_rtc_regs + field) | |
788b1fc6 | 42 | |
788b1fc6 AV |
43 | #define AT91_RTC_EPOCH 1900UL /* just like arch/arm/common/rtctime.c */ |
44 | ||
de645475 JH |
45 | struct at91_rtc_config { |
46 | }; | |
47 | ||
48 | static const struct at91_rtc_config *at91_rtc_config; | |
788b1fc6 AV |
49 | static DECLARE_COMPLETION(at91_rtc_updated); |
50 | static unsigned int at91_alarm_year = AT91_RTC_EPOCH; | |
d28bdfc5 JCPV |
51 | static void __iomem *at91_rtc_regs; |
52 | static int irq; | |
788b1fc6 | 53 | |
e304fcd0 JH |
54 | static void at91_rtc_write_ier(u32 mask) |
55 | { | |
56 | at91_rtc_write(AT91_RTC_IER, mask); | |
57 | } | |
58 | ||
59 | static void at91_rtc_write_idr(u32 mask) | |
60 | { | |
61 | at91_rtc_write(AT91_RTC_IDR, mask); | |
62 | } | |
63 | ||
64 | static u32 at91_rtc_read_imr(void) | |
65 | { | |
66 | return at91_rtc_read(AT91_RTC_IMR); | |
67 | } | |
68 | ||
788b1fc6 AV |
69 | /* |
70 | * Decode time/date into rtc_time structure | |
71 | */ | |
e7a8bb12 AM |
72 | static void at91_rtc_decodetime(unsigned int timereg, unsigned int calreg, |
73 | struct rtc_time *tm) | |
788b1fc6 AV |
74 | { |
75 | unsigned int time, date; | |
76 | ||
77 | /* must read twice in case it changes */ | |
78 | do { | |
d28bdfc5 JCPV |
79 | time = at91_rtc_read(timereg); |
80 | date = at91_rtc_read(calreg); | |
81 | } while ((time != at91_rtc_read(timereg)) || | |
82 | (date != at91_rtc_read(calreg))); | |
788b1fc6 | 83 | |
fe20ba70 AB |
84 | tm->tm_sec = bcd2bin((time & AT91_RTC_SEC) >> 0); |
85 | tm->tm_min = bcd2bin((time & AT91_RTC_MIN) >> 8); | |
86 | tm->tm_hour = bcd2bin((time & AT91_RTC_HOUR) >> 16); | |
788b1fc6 AV |
87 | |
88 | /* | |
89 | * The Calendar Alarm register does not have a field for | |
90 | * the year - so these will return an invalid value. When an | |
25985edc | 91 | * alarm is set, at91_alarm_year will store the current year. |
788b1fc6 | 92 | */ |
fe20ba70 AB |
93 | tm->tm_year = bcd2bin(date & AT91_RTC_CENT) * 100; /* century */ |
94 | tm->tm_year += bcd2bin((date & AT91_RTC_YEAR) >> 8); /* year */ | |
788b1fc6 | 95 | |
fe20ba70 AB |
96 | tm->tm_wday = bcd2bin((date & AT91_RTC_DAY) >> 21) - 1; /* day of the week [0-6], Sunday=0 */ |
97 | tm->tm_mon = bcd2bin((date & AT91_RTC_MONTH) >> 16) - 1; | |
98 | tm->tm_mday = bcd2bin((date & AT91_RTC_DATE) >> 24); | |
788b1fc6 AV |
99 | } |
100 | ||
101 | /* | |
102 | * Read current time and date in RTC | |
103 | */ | |
104 | static int at91_rtc_readtime(struct device *dev, struct rtc_time *tm) | |
105 | { | |
106 | at91_rtc_decodetime(AT91_RTC_TIMR, AT91_RTC_CALR, tm); | |
107 | tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year); | |
108 | tm->tm_year = tm->tm_year - 1900; | |
109 | ||
6588208c | 110 | dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, |
e7a8bb12 AM |
111 | 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, |
112 | tm->tm_hour, tm->tm_min, tm->tm_sec); | |
788b1fc6 AV |
113 | |
114 | return 0; | |
115 | } | |
116 | ||
117 | /* | |
118 | * Set current time and date in RTC | |
119 | */ | |
120 | static int at91_rtc_settime(struct device *dev, struct rtc_time *tm) | |
121 | { | |
122 | unsigned long cr; | |
123 | ||
6588208c | 124 | dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, |
e7a8bb12 AM |
125 | 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, |
126 | tm->tm_hour, tm->tm_min, tm->tm_sec); | |
788b1fc6 AV |
127 | |
128 | /* Stop Time/Calendar from counting */ | |
d28bdfc5 JCPV |
129 | cr = at91_rtc_read(AT91_RTC_CR); |
130 | at91_rtc_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM); | |
788b1fc6 | 131 | |
e304fcd0 | 132 | at91_rtc_write_ier(AT91_RTC_ACKUPD); |
e7a8bb12 | 133 | wait_for_completion(&at91_rtc_updated); /* wait for ACKUPD interrupt */ |
e304fcd0 | 134 | at91_rtc_write_idr(AT91_RTC_ACKUPD); |
788b1fc6 | 135 | |
d28bdfc5 | 136 | at91_rtc_write(AT91_RTC_TIMR, |
fe20ba70 AB |
137 | bin2bcd(tm->tm_sec) << 0 |
138 | | bin2bcd(tm->tm_min) << 8 | |
139 | | bin2bcd(tm->tm_hour) << 16); | |
788b1fc6 | 140 | |
d28bdfc5 | 141 | at91_rtc_write(AT91_RTC_CALR, |
fe20ba70 AB |
142 | bin2bcd((tm->tm_year + 1900) / 100) /* century */ |
143 | | bin2bcd(tm->tm_year % 100) << 8 /* year */ | |
144 | | bin2bcd(tm->tm_mon + 1) << 16 /* tm_mon starts at zero */ | |
145 | | bin2bcd(tm->tm_wday + 1) << 21 /* day of the week [0-6], Sunday=0 */ | |
146 | | bin2bcd(tm->tm_mday) << 24); | |
788b1fc6 AV |
147 | |
148 | /* Restart Time/Calendar */ | |
d28bdfc5 JCPV |
149 | cr = at91_rtc_read(AT91_RTC_CR); |
150 | at91_rtc_write(AT91_RTC_CR, cr & ~(AT91_RTC_UPDCAL | AT91_RTC_UPDTIM)); | |
788b1fc6 AV |
151 | |
152 | return 0; | |
153 | } | |
154 | ||
155 | /* | |
156 | * Read alarm time and date in RTC | |
157 | */ | |
158 | static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm) | |
159 | { | |
160 | struct rtc_time *tm = &alrm->time; | |
161 | ||
162 | at91_rtc_decodetime(AT91_RTC_TIMALR, AT91_RTC_CALALR, tm); | |
163 | tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year); | |
164 | tm->tm_year = at91_alarm_year - 1900; | |
165 | ||
e304fcd0 | 166 | alrm->enabled = (at91_rtc_read_imr() & AT91_RTC_ALARM) |
a2db8dfc DB |
167 | ? 1 : 0; |
168 | ||
6588208c | 169 | dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, |
e7a8bb12 AM |
170 | 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, |
171 | tm->tm_hour, tm->tm_min, tm->tm_sec); | |
788b1fc6 AV |
172 | |
173 | return 0; | |
174 | } | |
175 | ||
176 | /* | |
177 | * Set alarm time and date in RTC | |
178 | */ | |
179 | static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) | |
180 | { | |
181 | struct rtc_time tm; | |
182 | ||
183 | at91_rtc_decodetime(AT91_RTC_TIMR, AT91_RTC_CALR, &tm); | |
184 | ||
185 | at91_alarm_year = tm.tm_year; | |
186 | ||
187 | tm.tm_hour = alrm->time.tm_hour; | |
188 | tm.tm_min = alrm->time.tm_min; | |
189 | tm.tm_sec = alrm->time.tm_sec; | |
190 | ||
e304fcd0 | 191 | at91_rtc_write_idr(AT91_RTC_ALARM); |
d28bdfc5 | 192 | at91_rtc_write(AT91_RTC_TIMALR, |
fe20ba70 AB |
193 | bin2bcd(tm.tm_sec) << 0 |
194 | | bin2bcd(tm.tm_min) << 8 | |
195 | | bin2bcd(tm.tm_hour) << 16 | |
788b1fc6 | 196 | | AT91_RTC_HOUREN | AT91_RTC_MINEN | AT91_RTC_SECEN); |
d28bdfc5 | 197 | at91_rtc_write(AT91_RTC_CALALR, |
fe20ba70 AB |
198 | bin2bcd(tm.tm_mon + 1) << 16 /* tm_mon starts at zero */ |
199 | | bin2bcd(tm.tm_mday) << 24 | |
788b1fc6 AV |
200 | | AT91_RTC_DATEEN | AT91_RTC_MTHEN); |
201 | ||
449321b3 | 202 | if (alrm->enabled) { |
d28bdfc5 | 203 | at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM); |
e304fcd0 | 204 | at91_rtc_write_ier(AT91_RTC_ALARM); |
449321b3 | 205 | } |
5d4675a8 | 206 | |
6588208c | 207 | dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, |
e7a8bb12 AM |
208 | at91_alarm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour, |
209 | tm.tm_min, tm.tm_sec); | |
788b1fc6 AV |
210 | |
211 | return 0; | |
212 | } | |
213 | ||
16380c15 JS |
214 | static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) |
215 | { | |
6588208c | 216 | dev_dbg(dev, "%s(): cmd=%08x\n", __func__, enabled); |
16380c15 JS |
217 | |
218 | if (enabled) { | |
d28bdfc5 | 219 | at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM); |
e304fcd0 | 220 | at91_rtc_write_ier(AT91_RTC_ALARM); |
e24b0bfa | 221 | } else |
e304fcd0 | 222 | at91_rtc_write_idr(AT91_RTC_ALARM); |
16380c15 JS |
223 | |
224 | return 0; | |
225 | } | |
788b1fc6 AV |
226 | /* |
227 | * Provide additional RTC information in /proc/driver/rtc | |
228 | */ | |
229 | static int at91_rtc_proc(struct device *dev, struct seq_file *seq) | |
230 | { | |
e304fcd0 | 231 | unsigned long imr = at91_rtc_read_imr(); |
e24b0bfa | 232 | |
e7a8bb12 | 233 | seq_printf(seq, "update_IRQ\t: %s\n", |
e24b0bfa | 234 | (imr & AT91_RTC_ACKUPD) ? "yes" : "no"); |
e7a8bb12 | 235 | seq_printf(seq, "periodic_IRQ\t: %s\n", |
e24b0bfa | 236 | (imr & AT91_RTC_SECEV) ? "yes" : "no"); |
788b1fc6 AV |
237 | |
238 | return 0; | |
239 | } | |
240 | ||
241 | /* | |
242 | * IRQ handler for the RTC | |
243 | */ | |
7d12e780 | 244 | static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id) |
788b1fc6 | 245 | { |
e7a8bb12 | 246 | struct platform_device *pdev = dev_id; |
788b1fc6 AV |
247 | struct rtc_device *rtc = platform_get_drvdata(pdev); |
248 | unsigned int rtsr; | |
249 | unsigned long events = 0; | |
250 | ||
e304fcd0 | 251 | rtsr = at91_rtc_read(AT91_RTC_SR) & at91_rtc_read_imr(); |
788b1fc6 AV |
252 | if (rtsr) { /* this interrupt is shared! Is it ours? */ |
253 | if (rtsr & AT91_RTC_ALARM) | |
254 | events |= (RTC_AF | RTC_IRQF); | |
255 | if (rtsr & AT91_RTC_SECEV) | |
256 | events |= (RTC_UF | RTC_IRQF); | |
257 | if (rtsr & AT91_RTC_ACKUPD) | |
258 | complete(&at91_rtc_updated); | |
259 | ||
d28bdfc5 | 260 | at91_rtc_write(AT91_RTC_SCCR, rtsr); /* clear status reg */ |
788b1fc6 | 261 | |
ab6a2d70 | 262 | rtc_update_irq(rtc, 1, events); |
788b1fc6 | 263 | |
6588208c | 264 | dev_dbg(&pdev->dev, "%s(): num=%ld, events=0x%02lx\n", __func__, |
788b1fc6 AV |
265 | events >> 8, events & 0x000000FF); |
266 | ||
267 | return IRQ_HANDLED; | |
268 | } | |
269 | return IRQ_NONE; /* not handled */ | |
270 | } | |
271 | ||
de645475 JH |
272 | static const struct at91_rtc_config at91rm9200_config = { |
273 | }; | |
274 | ||
275 | #ifdef CONFIG_OF | |
276 | static const struct of_device_id at91_rtc_dt_ids[] = { | |
277 | { | |
278 | .compatible = "atmel,at91rm9200-rtc", | |
279 | .data = &at91rm9200_config, | |
280 | }, { | |
281 | /* sentinel */ | |
282 | } | |
283 | }; | |
284 | MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids); | |
285 | #endif | |
286 | ||
287 | static const struct at91_rtc_config * | |
288 | at91_rtc_get_config(struct platform_device *pdev) | |
289 | { | |
290 | const struct of_device_id *match; | |
291 | ||
292 | if (pdev->dev.of_node) { | |
293 | match = of_match_node(at91_rtc_dt_ids, pdev->dev.of_node); | |
294 | if (!match) | |
295 | return NULL; | |
296 | return (const struct at91_rtc_config *)match->data; | |
297 | } | |
298 | ||
299 | return &at91rm9200_config; | |
300 | } | |
301 | ||
ff8371ac | 302 | static const struct rtc_class_ops at91_rtc_ops = { |
788b1fc6 AV |
303 | .read_time = at91_rtc_readtime, |
304 | .set_time = at91_rtc_settime, | |
305 | .read_alarm = at91_rtc_readalarm, | |
306 | .set_alarm = at91_rtc_setalarm, | |
307 | .proc = at91_rtc_proc, | |
16380c15 | 308 | .alarm_irq_enable = at91_rtc_alarm_irq_enable, |
788b1fc6 AV |
309 | }; |
310 | ||
311 | /* | |
312 | * Initialize and install RTC driver | |
313 | */ | |
314 | static int __init at91_rtc_probe(struct platform_device *pdev) | |
315 | { | |
316 | struct rtc_device *rtc; | |
d28bdfc5 JCPV |
317 | struct resource *regs; |
318 | int ret = 0; | |
788b1fc6 | 319 | |
de645475 JH |
320 | at91_rtc_config = at91_rtc_get_config(pdev); |
321 | if (!at91_rtc_config) | |
322 | return -ENODEV; | |
323 | ||
d28bdfc5 JCPV |
324 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
325 | if (!regs) { | |
326 | dev_err(&pdev->dev, "no mmio resource defined\n"); | |
327 | return -ENXIO; | |
328 | } | |
329 | ||
330 | irq = platform_get_irq(pdev, 0); | |
331 | if (irq < 0) { | |
332 | dev_err(&pdev->dev, "no irq resource defined\n"); | |
333 | return -ENXIO; | |
334 | } | |
335 | ||
336 | at91_rtc_regs = ioremap(regs->start, resource_size(regs)); | |
337 | if (!at91_rtc_regs) { | |
338 | dev_err(&pdev->dev, "failed to map registers, aborting.\n"); | |
339 | return -ENOMEM; | |
340 | } | |
341 | ||
342 | at91_rtc_write(AT91_RTC_CR, 0); | |
343 | at91_rtc_write(AT91_RTC_MR, 0); /* 24 hour mode */ | |
788b1fc6 AV |
344 | |
345 | /* Disable all interrupts */ | |
e304fcd0 | 346 | at91_rtc_write_idr(AT91_RTC_ACKUPD | AT91_RTC_ALARM | |
e7a8bb12 AM |
347 | AT91_RTC_SECEV | AT91_RTC_TIMEV | |
348 | AT91_RTC_CALEV); | |
788b1fc6 | 349 | |
d28bdfc5 | 350 | ret = request_irq(irq, at91_rtc_interrupt, |
dac94d9e | 351 | IRQF_SHARED, |
d728b1e6 | 352 | "at91_rtc", pdev); |
788b1fc6 | 353 | if (ret) { |
6588208c | 354 | dev_err(&pdev->dev, "IRQ %d already in use.\n", irq); |
3427de92 | 355 | goto err_unmap; |
788b1fc6 AV |
356 | } |
357 | ||
5d4675a8 DB |
358 | /* cpu init code should really have flagged this device as |
359 | * being wake-capable; if it didn't, do that here. | |
360 | */ | |
361 | if (!device_can_wakeup(&pdev->dev)) | |
362 | device_init_wakeup(&pdev->dev, 1); | |
363 | ||
e7a8bb12 AM |
364 | rtc = rtc_device_register(pdev->name, &pdev->dev, |
365 | &at91_rtc_ops, THIS_MODULE); | |
788b1fc6 | 366 | if (IS_ERR(rtc)) { |
3427de92 JH |
367 | ret = PTR_ERR(rtc); |
368 | goto err_free_irq; | |
788b1fc6 AV |
369 | } |
370 | platform_set_drvdata(pdev, rtc); | |
371 | ||
6588208c | 372 | dev_info(&pdev->dev, "AT91 Real Time Clock driver.\n"); |
788b1fc6 | 373 | return 0; |
3427de92 JH |
374 | |
375 | err_free_irq: | |
376 | free_irq(irq, pdev); | |
377 | err_unmap: | |
378 | iounmap(at91_rtc_regs); | |
379 | ||
380 | return ret; | |
788b1fc6 AV |
381 | } |
382 | ||
383 | /* | |
384 | * Disable and remove the RTC driver | |
385 | */ | |
5d4675a8 | 386 | static int __exit at91_rtc_remove(struct platform_device *pdev) |
788b1fc6 AV |
387 | { |
388 | struct rtc_device *rtc = platform_get_drvdata(pdev); | |
389 | ||
390 | /* Disable all interrupts */ | |
e304fcd0 | 391 | at91_rtc_write_idr(AT91_RTC_ACKUPD | AT91_RTC_ALARM | |
e7a8bb12 AM |
392 | AT91_RTC_SECEV | AT91_RTC_TIMEV | |
393 | AT91_RTC_CALEV); | |
d28bdfc5 | 394 | free_irq(irq, pdev); |
788b1fc6 AV |
395 | |
396 | rtc_device_unregister(rtc); | |
3427de92 | 397 | iounmap(at91_rtc_regs); |
788b1fc6 AV |
398 | platform_set_drvdata(pdev, NULL); |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
6975a9c1 | 403 | #ifdef CONFIG_PM_SLEEP |
788b1fc6 AV |
404 | |
405 | /* AT91RM9200 RTC Power management control */ | |
406 | ||
e24b0bfa | 407 | static u32 at91_rtc_imr; |
788b1fc6 | 408 | |
dac94d9e | 409 | static int at91_rtc_suspend(struct device *dev) |
788b1fc6 | 410 | { |
90b4d648 DB |
411 | /* this IRQ is shared with DBGU and other hardware which isn't |
412 | * necessarily doing PM like we are... | |
413 | */ | |
e304fcd0 | 414 | at91_rtc_imr = at91_rtc_read_imr() |
e24b0bfa JH |
415 | & (AT91_RTC_ALARM|AT91_RTC_SECEV); |
416 | if (at91_rtc_imr) { | |
417 | if (device_may_wakeup(dev)) | |
d28bdfc5 | 418 | enable_irq_wake(irq); |
e24b0bfa | 419 | else |
e304fcd0 | 420 | at91_rtc_write_idr(at91_rtc_imr); |
e24b0bfa | 421 | } |
788b1fc6 AV |
422 | return 0; |
423 | } | |
424 | ||
dac94d9e | 425 | static int at91_rtc_resume(struct device *dev) |
788b1fc6 | 426 | { |
e24b0bfa JH |
427 | if (at91_rtc_imr) { |
428 | if (device_may_wakeup(dev)) | |
d28bdfc5 | 429 | disable_irq_wake(irq); |
e24b0bfa | 430 | else |
e304fcd0 | 431 | at91_rtc_write_ier(at91_rtc_imr); |
90b4d648 | 432 | } |
788b1fc6 AV |
433 | return 0; |
434 | } | |
788b1fc6 AV |
435 | #endif |
436 | ||
6975a9c1 JH |
437 | static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume); |
438 | ||
788b1fc6 | 439 | static struct platform_driver at91_rtc_driver = { |
5d4675a8 | 440 | .remove = __exit_p(at91_rtc_remove), |
788b1fc6 AV |
441 | .driver = { |
442 | .name = "at91_rtc", | |
443 | .owner = THIS_MODULE, | |
6975a9c1 | 444 | .pm = &at91_rtc_pm_ops, |
7c1b68d4 | 445 | .of_match_table = of_match_ptr(at91_rtc_dt_ids), |
788b1fc6 AV |
446 | }, |
447 | }; | |
448 | ||
ac36960f | 449 | module_platform_driver_probe(at91_rtc_driver, at91_rtc_probe); |
788b1fc6 AV |
450 | |
451 | MODULE_AUTHOR("Rick Bronson"); | |
452 | MODULE_DESCRIPTION("RTC driver for Atmel AT91RM9200"); | |
453 | MODULE_LICENSE("GPL"); | |
ad28a07b | 454 | MODULE_ALIAS("platform:at91_rtc"); |