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db68b189 DB |
1 | /* |
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> | |
db68b189 DB |
25 | |
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 | ||
90 | ||
91 | #define rtc_read(addr) omap_readb(OMAP_RTC_BASE + (addr)) | |
92 | #define rtc_write(val, addr) omap_writeb(val, OMAP_RTC_BASE + (addr)) | |
93 | ||
94 | ||
95 | /* platform_bus isn't hotpluggable, so for static linkage it'd be safe | |
96 | * to get rid of probe() and remove() code ... too bad the driver struct | |
97 | * remembers probe(), that's about 25% of the runtime footprint!! | |
98 | */ | |
99 | #ifndef MODULE | |
100 | #undef __devexit | |
101 | #undef __devexit_p | |
102 | #define __devexit __exit | |
103 | #define __devexit_p __exit_p | |
104 | #endif | |
105 | ||
106 | ||
107 | /* we rely on the rtc framework to handle locking (rtc->ops_lock), | |
108 | * so the only other requirement is that register accesses which | |
109 | * require BUSY to be clear are made with IRQs locally disabled | |
110 | */ | |
111 | static void rtc_wait_not_busy(void) | |
112 | { | |
113 | int count = 0; | |
114 | u8 status; | |
115 | ||
116 | /* BUSY may stay active for 1/32768 second (~30 usec) */ | |
117 | for (count = 0; count < 50; count++) { | |
118 | status = rtc_read(OMAP_RTC_STATUS_REG); | |
119 | if ((status & (u8)OMAP_RTC_STATUS_BUSY) == 0) | |
120 | break; | |
121 | udelay(1); | |
122 | } | |
123 | /* now we have ~15 usec to read/write various registers */ | |
124 | } | |
125 | ||
ab6a2d70 | 126 | static irqreturn_t rtc_irq(int irq, void *rtc) |
db68b189 DB |
127 | { |
128 | unsigned long events = 0; | |
129 | u8 irq_data; | |
130 | ||
131 | irq_data = rtc_read(OMAP_RTC_STATUS_REG); | |
132 | ||
133 | /* alarm irq? */ | |
134 | if (irq_data & OMAP_RTC_STATUS_ALARM) { | |
135 | rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG); | |
136 | events |= RTC_IRQF | RTC_AF; | |
137 | } | |
138 | ||
139 | /* 1/sec periodic/update irq? */ | |
140 | if (irq_data & OMAP_RTC_STATUS_1S_EVENT) | |
141 | events |= RTC_IRQF | RTC_UF; | |
142 | ||
ab6a2d70 | 143 | rtc_update_irq(rtc, 1, events); |
db68b189 DB |
144 | |
145 | return IRQ_HANDLED; | |
146 | } | |
147 | ||
148 | #ifdef CONFIG_RTC_INTF_DEV | |
149 | ||
150 | static int | |
151 | omap_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) | |
152 | { | |
153 | u8 reg; | |
154 | ||
155 | switch (cmd) { | |
156 | case RTC_AIE_OFF: | |
157 | case RTC_AIE_ON: | |
158 | case RTC_UIE_OFF: | |
159 | case RTC_UIE_ON: | |
160 | break; | |
161 | default: | |
162 | return -ENOIOCTLCMD; | |
163 | } | |
164 | ||
165 | local_irq_disable(); | |
166 | rtc_wait_not_busy(); | |
167 | reg = rtc_read(OMAP_RTC_INTERRUPTS_REG); | |
168 | switch (cmd) { | |
169 | /* AIE = Alarm Interrupt Enable */ | |
170 | case RTC_AIE_OFF: | |
171 | reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM; | |
172 | break; | |
173 | case RTC_AIE_ON: | |
174 | reg |= OMAP_RTC_INTERRUPTS_IT_ALARM; | |
175 | break; | |
176 | /* UIE = Update Interrupt Enable (1/second) */ | |
177 | case RTC_UIE_OFF: | |
178 | reg &= ~OMAP_RTC_INTERRUPTS_IT_TIMER; | |
179 | break; | |
180 | case RTC_UIE_ON: | |
181 | reg |= OMAP_RTC_INTERRUPTS_IT_TIMER; | |
182 | break; | |
183 | } | |
184 | rtc_wait_not_busy(); | |
185 | rtc_write(reg, OMAP_RTC_INTERRUPTS_REG); | |
186 | local_irq_enable(); | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
191 | #else | |
192 | #define omap_rtc_ioctl NULL | |
193 | #endif | |
194 | ||
195 | /* this hardware doesn't support "don't care" alarm fields */ | |
196 | static int tm2bcd(struct rtc_time *tm) | |
197 | { | |
198 | if (rtc_valid_tm(tm) != 0) | |
199 | return -EINVAL; | |
200 | ||
201 | tm->tm_sec = BIN2BCD(tm->tm_sec); | |
202 | tm->tm_min = BIN2BCD(tm->tm_min); | |
203 | tm->tm_hour = BIN2BCD(tm->tm_hour); | |
204 | tm->tm_mday = BIN2BCD(tm->tm_mday); | |
205 | ||
206 | tm->tm_mon = BIN2BCD(tm->tm_mon + 1); | |
207 | ||
208 | /* epoch == 1900 */ | |
209 | if (tm->tm_year < 100 || tm->tm_year > 199) | |
210 | return -EINVAL; | |
211 | tm->tm_year = BIN2BCD(tm->tm_year - 100); | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | static void bcd2tm(struct rtc_time *tm) | |
217 | { | |
218 | tm->tm_sec = BCD2BIN(tm->tm_sec); | |
219 | tm->tm_min = BCD2BIN(tm->tm_min); | |
220 | tm->tm_hour = BCD2BIN(tm->tm_hour); | |
221 | tm->tm_mday = BCD2BIN(tm->tm_mday); | |
222 | tm->tm_mon = BCD2BIN(tm->tm_mon) - 1; | |
223 | /* epoch == 1900 */ | |
224 | tm->tm_year = BCD2BIN(tm->tm_year) + 100; | |
225 | } | |
226 | ||
227 | ||
228 | static int omap_rtc_read_time(struct device *dev, struct rtc_time *tm) | |
229 | { | |
230 | /* we don't report wday/yday/isdst ... */ | |
231 | local_irq_disable(); | |
232 | rtc_wait_not_busy(); | |
233 | ||
234 | tm->tm_sec = rtc_read(OMAP_RTC_SECONDS_REG); | |
235 | tm->tm_min = rtc_read(OMAP_RTC_MINUTES_REG); | |
236 | tm->tm_hour = rtc_read(OMAP_RTC_HOURS_REG); | |
237 | tm->tm_mday = rtc_read(OMAP_RTC_DAYS_REG); | |
238 | tm->tm_mon = rtc_read(OMAP_RTC_MONTHS_REG); | |
239 | tm->tm_year = rtc_read(OMAP_RTC_YEARS_REG); | |
240 | ||
241 | local_irq_enable(); | |
242 | ||
243 | bcd2tm(tm); | |
244 | return 0; | |
245 | } | |
246 | ||
247 | static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm) | |
248 | { | |
249 | if (tm2bcd(tm) < 0) | |
250 | return -EINVAL; | |
251 | local_irq_disable(); | |
252 | rtc_wait_not_busy(); | |
253 | ||
254 | rtc_write(tm->tm_year, OMAP_RTC_YEARS_REG); | |
255 | rtc_write(tm->tm_mon, OMAP_RTC_MONTHS_REG); | |
256 | rtc_write(tm->tm_mday, OMAP_RTC_DAYS_REG); | |
257 | rtc_write(tm->tm_hour, OMAP_RTC_HOURS_REG); | |
258 | rtc_write(tm->tm_min, OMAP_RTC_MINUTES_REG); | |
259 | rtc_write(tm->tm_sec, OMAP_RTC_SECONDS_REG); | |
260 | ||
261 | local_irq_enable(); | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) | |
267 | { | |
268 | local_irq_disable(); | |
269 | rtc_wait_not_busy(); | |
270 | ||
271 | alm->time.tm_sec = rtc_read(OMAP_RTC_ALARM_SECONDS_REG); | |
272 | alm->time.tm_min = rtc_read(OMAP_RTC_ALARM_MINUTES_REG); | |
273 | alm->time.tm_hour = rtc_read(OMAP_RTC_ALARM_HOURS_REG); | |
274 | alm->time.tm_mday = rtc_read(OMAP_RTC_ALARM_DAYS_REG); | |
275 | alm->time.tm_mon = rtc_read(OMAP_RTC_ALARM_MONTHS_REG); | |
276 | alm->time.tm_year = rtc_read(OMAP_RTC_ALARM_YEARS_REG); | |
277 | ||
278 | local_irq_enable(); | |
279 | ||
280 | bcd2tm(&alm->time); | |
a2db8dfc | 281 | alm->enabled = !!(rtc_read(OMAP_RTC_INTERRUPTS_REG) |
db68b189 | 282 | & OMAP_RTC_INTERRUPTS_IT_ALARM); |
db68b189 DB |
283 | |
284 | return 0; | |
285 | } | |
286 | ||
287 | static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) | |
288 | { | |
289 | u8 reg; | |
290 | ||
db68b189 DB |
291 | if (tm2bcd(&alm->time) < 0) |
292 | return -EINVAL; | |
293 | ||
294 | local_irq_disable(); | |
295 | rtc_wait_not_busy(); | |
296 | ||
297 | rtc_write(alm->time.tm_year, OMAP_RTC_ALARM_YEARS_REG); | |
298 | rtc_write(alm->time.tm_mon, OMAP_RTC_ALARM_MONTHS_REG); | |
299 | rtc_write(alm->time.tm_mday, OMAP_RTC_ALARM_DAYS_REG); | |
300 | rtc_write(alm->time.tm_hour, OMAP_RTC_ALARM_HOURS_REG); | |
301 | rtc_write(alm->time.tm_min, OMAP_RTC_ALARM_MINUTES_REG); | |
302 | rtc_write(alm->time.tm_sec, OMAP_RTC_ALARM_SECONDS_REG); | |
303 | ||
304 | reg = rtc_read(OMAP_RTC_INTERRUPTS_REG); | |
305 | if (alm->enabled) | |
306 | reg |= OMAP_RTC_INTERRUPTS_IT_ALARM; | |
307 | else | |
308 | reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM; | |
309 | rtc_write(reg, OMAP_RTC_INTERRUPTS_REG); | |
310 | ||
311 | local_irq_enable(); | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
316 | static struct rtc_class_ops omap_rtc_ops = { | |
317 | .ioctl = omap_rtc_ioctl, | |
318 | .read_time = omap_rtc_read_time, | |
319 | .set_time = omap_rtc_set_time, | |
320 | .read_alarm = omap_rtc_read_alarm, | |
321 | .set_alarm = omap_rtc_set_alarm, | |
322 | }; | |
323 | ||
324 | static int omap_rtc_alarm; | |
325 | static int omap_rtc_timer; | |
326 | ||
327 | static int __devinit omap_rtc_probe(struct platform_device *pdev) | |
328 | { | |
329 | struct resource *res, *mem; | |
330 | struct rtc_device *rtc; | |
331 | u8 reg, new_ctrl; | |
332 | ||
333 | omap_rtc_timer = platform_get_irq(pdev, 0); | |
334 | if (omap_rtc_timer <= 0) { | |
335 | pr_debug("%s: no update irq?\n", pdev->name); | |
336 | return -ENOENT; | |
337 | } | |
338 | ||
339 | omap_rtc_alarm = platform_get_irq(pdev, 1); | |
340 | if (omap_rtc_alarm <= 0) { | |
341 | pr_debug("%s: no alarm irq?\n", pdev->name); | |
342 | return -ENOENT; | |
343 | } | |
344 | ||
345 | /* NOTE: using static mapping for RTC registers */ | |
346 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
347 | if (res && res->start != OMAP_RTC_BASE) { | |
348 | pr_debug("%s: RTC registers at %08x, expected %08x\n", | |
349 | pdev->name, (unsigned) res->start, OMAP_RTC_BASE); | |
350 | return -ENOENT; | |
351 | } | |
352 | ||
353 | if (res) | |
354 | mem = request_mem_region(res->start, | |
355 | res->end - res->start + 1, | |
356 | pdev->name); | |
357 | else | |
358 | mem = NULL; | |
359 | if (!mem) { | |
360 | pr_debug("%s: RTC registers at %08x are not free\n", | |
361 | pdev->name, OMAP_RTC_BASE); | |
362 | return -EBUSY; | |
363 | } | |
364 | ||
365 | rtc = rtc_device_register(pdev->name, &pdev->dev, | |
366 | &omap_rtc_ops, THIS_MODULE); | |
367 | if (IS_ERR(rtc)) { | |
368 | pr_debug("%s: can't register RTC device, err %ld\n", | |
369 | pdev->name, PTR_ERR(rtc)); | |
370 | goto fail; | |
371 | } | |
372 | platform_set_drvdata(pdev, rtc); | |
558a40f7 | 373 | dev_set_drvdata(&rtc->dev, mem); |
db68b189 DB |
374 | |
375 | /* clear pending irqs, and set 1/second periodic, | |
376 | * which we'll use instead of update irqs | |
377 | */ | |
378 | rtc_write(0, OMAP_RTC_INTERRUPTS_REG); | |
379 | ||
380 | /* clear old status */ | |
381 | reg = rtc_read(OMAP_RTC_STATUS_REG); | |
382 | if (reg & (u8) OMAP_RTC_STATUS_POWER_UP) { | |
383 | pr_info("%s: RTC power up reset detected\n", | |
384 | pdev->name); | |
385 | rtc_write(OMAP_RTC_STATUS_POWER_UP, OMAP_RTC_STATUS_REG); | |
386 | } | |
387 | if (reg & (u8) OMAP_RTC_STATUS_ALARM) | |
388 | rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG); | |
389 | ||
390 | /* handle periodic and alarm irqs */ | |
38515e90 | 391 | if (request_irq(omap_rtc_timer, rtc_irq, IRQF_DISABLED, |
cd966209 | 392 | rtc->dev.bus_id, rtc)) { |
db68b189 DB |
393 | pr_debug("%s: RTC timer interrupt IRQ%d already claimed\n", |
394 | pdev->name, omap_rtc_timer); | |
395 | goto fail0; | |
396 | } | |
38515e90 | 397 | if (request_irq(omap_rtc_alarm, rtc_irq, IRQF_DISABLED, |
cd966209 | 398 | rtc->dev.bus_id, rtc)) { |
db68b189 DB |
399 | pr_debug("%s: RTC alarm interrupt IRQ%d already claimed\n", |
400 | pdev->name, omap_rtc_alarm); | |
401 | goto fail1; | |
402 | } | |
403 | ||
404 | /* On boards with split power, RTC_ON_NOFF won't reset the RTC */ | |
405 | reg = rtc_read(OMAP_RTC_CTRL_REG); | |
406 | if (reg & (u8) OMAP_RTC_CTRL_STOP) | |
407 | pr_info("%s: already running\n", pdev->name); | |
408 | ||
409 | /* force to 24 hour mode */ | |
410 | new_ctrl = reg & ~(OMAP_RTC_CTRL_SPLIT|OMAP_RTC_CTRL_AUTO_COMP); | |
411 | new_ctrl |= OMAP_RTC_CTRL_STOP; | |
412 | ||
413 | /* BOARD-SPECIFIC CUSTOMIZATION CAN GO HERE: | |
414 | * | |
415 | * - Boards wired so that RTC_WAKE_INT does something, and muxed | |
416 | * right (W13_1610_RTC_WAKE_INT is the default after chip reset), | |
417 | * should initialize the device wakeup flag appropriately. | |
418 | * | |
419 | * - Boards wired so RTC_ON_nOFF is used as the reset signal, | |
420 | * rather than nPWRON_RESET, should forcibly enable split | |
421 | * power mode. (Some chip errata report that RTC_CTRL_SPLIT | |
422 | * is write-only, and always reads as zero...) | |
423 | */ | |
424 | device_init_wakeup(&pdev->dev, 0); | |
425 | ||
426 | if (new_ctrl & (u8) OMAP_RTC_CTRL_SPLIT) | |
427 | pr_info("%s: split power mode\n", pdev->name); | |
428 | ||
429 | if (reg != new_ctrl) | |
430 | rtc_write(new_ctrl, OMAP_RTC_CTRL_REG); | |
431 | ||
432 | return 0; | |
433 | ||
434 | fail1: | |
435 | free_irq(omap_rtc_timer, NULL); | |
436 | fail0: | |
437 | rtc_device_unregister(rtc); | |
438 | fail: | |
439 | release_resource(mem); | |
440 | return -EIO; | |
441 | } | |
442 | ||
443 | static int __devexit omap_rtc_remove(struct platform_device *pdev) | |
444 | { | |
445 | struct rtc_device *rtc = platform_get_drvdata(pdev);; | |
446 | ||
447 | device_init_wakeup(&pdev->dev, 0); | |
448 | ||
449 | /* leave rtc running, but disable irqs */ | |
450 | rtc_write(0, OMAP_RTC_INTERRUPTS_REG); | |
451 | ||
452 | free_irq(omap_rtc_timer, rtc); | |
453 | free_irq(omap_rtc_alarm, rtc); | |
454 | ||
558a40f7 | 455 | release_resource(dev_get_drvdata(&rtc->dev)); |
db68b189 DB |
456 | rtc_device_unregister(rtc); |
457 | return 0; | |
458 | } | |
459 | ||
460 | #ifdef CONFIG_PM | |
461 | ||
db68b189 DB |
462 | static u8 irqstat; |
463 | ||
464 | static int omap_rtc_suspend(struct platform_device *pdev, pm_message_t state) | |
465 | { | |
db68b189 DB |
466 | irqstat = rtc_read(OMAP_RTC_INTERRUPTS_REG); |
467 | ||
468 | /* FIXME the RTC alarm is not currently acting as a wakeup event | |
469 | * source, and in fact this enable() call is just saving a flag | |
470 | * that's never used... | |
471 | */ | |
472 | if (device_may_wakeup(&pdev->dev)) | |
473 | enable_irq_wake(omap_rtc_alarm); | |
474 | else | |
475 | rtc_write(0, OMAP_RTC_INTERRUPTS_REG); | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | static int omap_rtc_resume(struct platform_device *pdev) | |
481 | { | |
db68b189 DB |
482 | if (device_may_wakeup(&pdev->dev)) |
483 | disable_irq_wake(omap_rtc_alarm); | |
484 | else | |
485 | rtc_write(irqstat, OMAP_RTC_INTERRUPTS_REG); | |
486 | return 0; | |
487 | } | |
488 | ||
489 | #else | |
490 | #define omap_rtc_suspend NULL | |
491 | #define omap_rtc_resume NULL | |
492 | #endif | |
493 | ||
494 | static void omap_rtc_shutdown(struct platform_device *pdev) | |
495 | { | |
496 | rtc_write(0, OMAP_RTC_INTERRUPTS_REG); | |
497 | } | |
498 | ||
ad28a07b | 499 | MODULE_ALIAS("platform:omap_rtc"); |
db68b189 DB |
500 | static struct platform_driver omap_rtc_driver = { |
501 | .probe = omap_rtc_probe, | |
502 | .remove = __devexit_p(omap_rtc_remove), | |
503 | .suspend = omap_rtc_suspend, | |
504 | .resume = omap_rtc_resume, | |
505 | .shutdown = omap_rtc_shutdown, | |
506 | .driver = { | |
507 | .name = "omap_rtc", | |
508 | .owner = THIS_MODULE, | |
509 | }, | |
510 | }; | |
511 | ||
512 | static int __init rtc_init(void) | |
513 | { | |
514 | return platform_driver_register(&omap_rtc_driver); | |
515 | } | |
516 | module_init(rtc_init); | |
517 | ||
518 | static void __exit rtc_exit(void) | |
519 | { | |
520 | platform_driver_unregister(&omap_rtc_driver); | |
521 | } | |
522 | module_exit(rtc_exit); | |
523 | ||
524 | MODULE_AUTHOR("George G. Davis (and others)"); | |
525 | MODULE_LICENSE("GPL"); |