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1 | /* |
2 | * rtc-twl4030.c -- TWL4030 Real Time Clock interface | |
3 | * | |
4 | * Copyright (C) 2007 MontaVista Software, Inc | |
5 | * Author: Alexandre Rusev <source@mvista.com> | |
6 | * | |
7 | * Based on original TI driver twl4030-rtc.c | |
8 | * Copyright (C) 2006 Texas Instruments, Inc. | |
9 | * | |
10 | * Based on rtc-omap.c | |
11 | * Copyright (C) 2003 MontaVista Software, Inc. | |
12 | * Author: George G. Davis <gdavis@mvista.com> or <source@mvista.com> | |
13 | * Copyright (C) 2006 David Brownell | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License | |
17 | * as published by the Free Software Foundation; either version | |
18 | * 2 of the License, or (at your option) any later version. | |
19 | */ | |
20 | ||
21 | #include <linux/kernel.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/rtc.h> | |
26 | #include <linux/bcd.h> | |
27 | #include <linux/platform_device.h> | |
28 | #include <linux/interrupt.h> | |
29 | ||
30 | #include <linux/i2c/twl4030.h> | |
31 | ||
32 | ||
33 | /* | |
34 | * RTC block register offsets (use TWL_MODULE_RTC) | |
35 | */ | |
36 | #define REG_SECONDS_REG 0x00 | |
37 | #define REG_MINUTES_REG 0x01 | |
38 | #define REG_HOURS_REG 0x02 | |
39 | #define REG_DAYS_REG 0x03 | |
40 | #define REG_MONTHS_REG 0x04 | |
41 | #define REG_YEARS_REG 0x05 | |
42 | #define REG_WEEKS_REG 0x06 | |
43 | ||
44 | #define REG_ALARM_SECONDS_REG 0x07 | |
45 | #define REG_ALARM_MINUTES_REG 0x08 | |
46 | #define REG_ALARM_HOURS_REG 0x09 | |
47 | #define REG_ALARM_DAYS_REG 0x0A | |
48 | #define REG_ALARM_MONTHS_REG 0x0B | |
49 | #define REG_ALARM_YEARS_REG 0x0C | |
50 | ||
51 | #define REG_RTC_CTRL_REG 0x0D | |
52 | #define REG_RTC_STATUS_REG 0x0E | |
53 | #define REG_RTC_INTERRUPTS_REG 0x0F | |
54 | ||
55 | #define REG_RTC_COMP_LSB_REG 0x10 | |
56 | #define REG_RTC_COMP_MSB_REG 0x11 | |
57 | ||
58 | /* RTC_CTRL_REG bitfields */ | |
59 | #define BIT_RTC_CTRL_REG_STOP_RTC_M 0x01 | |
60 | #define BIT_RTC_CTRL_REG_ROUND_30S_M 0x02 | |
61 | #define BIT_RTC_CTRL_REG_AUTO_COMP_M 0x04 | |
62 | #define BIT_RTC_CTRL_REG_MODE_12_24_M 0x08 | |
63 | #define BIT_RTC_CTRL_REG_TEST_MODE_M 0x10 | |
64 | #define BIT_RTC_CTRL_REG_SET_32_COUNTER_M 0x20 | |
65 | #define BIT_RTC_CTRL_REG_GET_TIME_M 0x40 | |
66 | ||
67 | /* RTC_STATUS_REG bitfields */ | |
68 | #define BIT_RTC_STATUS_REG_RUN_M 0x02 | |
69 | #define BIT_RTC_STATUS_REG_1S_EVENT_M 0x04 | |
70 | #define BIT_RTC_STATUS_REG_1M_EVENT_M 0x08 | |
71 | #define BIT_RTC_STATUS_REG_1H_EVENT_M 0x10 | |
72 | #define BIT_RTC_STATUS_REG_1D_EVENT_M 0x20 | |
73 | #define BIT_RTC_STATUS_REG_ALARM_M 0x40 | |
74 | #define BIT_RTC_STATUS_REG_POWER_UP_M 0x80 | |
75 | ||
76 | /* RTC_INTERRUPTS_REG bitfields */ | |
77 | #define BIT_RTC_INTERRUPTS_REG_EVERY_M 0x03 | |
78 | #define BIT_RTC_INTERRUPTS_REG_IT_TIMER_M 0x04 | |
79 | #define BIT_RTC_INTERRUPTS_REG_IT_ALARM_M 0x08 | |
80 | ||
81 | ||
82 | /* REG_SECONDS_REG through REG_YEARS_REG is how many registers? */ | |
83 | #define ALL_TIME_REGS 6 | |
84 | ||
85 | /*----------------------------------------------------------------------*/ | |
86 | ||
87 | /* | |
88 | * Supports 1 byte read from TWL4030 RTC register. | |
89 | */ | |
90 | static int twl4030_rtc_read_u8(u8 *data, u8 reg) | |
91 | { | |
92 | int ret; | |
93 | ||
94 | ret = twl4030_i2c_read_u8(TWL4030_MODULE_RTC, data, reg); | |
95 | if (ret < 0) | |
96 | pr_err("twl4030_rtc: Could not read TWL4030" | |
97 | "register %X - error %d\n", reg, ret); | |
98 | return ret; | |
99 | } | |
100 | ||
101 | /* | |
102 | * Supports 1 byte write to TWL4030 RTC registers. | |
103 | */ | |
104 | static int twl4030_rtc_write_u8(u8 data, u8 reg) | |
105 | { | |
106 | int ret; | |
107 | ||
108 | ret = twl4030_i2c_write_u8(TWL4030_MODULE_RTC, data, reg); | |
109 | if (ret < 0) | |
110 | pr_err("twl4030_rtc: Could not write TWL4030" | |
111 | "register %X - error %d\n", reg, ret); | |
112 | return ret; | |
113 | } | |
114 | ||
115 | /* | |
116 | * Cache the value for timer/alarm interrupts register; this is | |
117 | * only changed by callers holding rtc ops lock (or resume). | |
118 | */ | |
119 | static unsigned char rtc_irq_bits; | |
120 | ||
121 | /* | |
122 | * Enable timer and/or alarm interrupts. | |
123 | */ | |
124 | static int set_rtc_irq_bit(unsigned char bit) | |
125 | { | |
126 | unsigned char val; | |
127 | int ret; | |
128 | ||
129 | val = rtc_irq_bits | bit; | |
130 | ret = twl4030_rtc_write_u8(val, REG_RTC_INTERRUPTS_REG); | |
131 | if (ret == 0) | |
132 | rtc_irq_bits = val; | |
133 | ||
134 | return ret; | |
135 | } | |
136 | ||
137 | /* | |
138 | * Disable timer and/or alarm interrupts. | |
139 | */ | |
140 | static int mask_rtc_irq_bit(unsigned char bit) | |
141 | { | |
142 | unsigned char val; | |
143 | int ret; | |
144 | ||
145 | val = rtc_irq_bits & ~bit; | |
146 | ret = twl4030_rtc_write_u8(val, REG_RTC_INTERRUPTS_REG); | |
147 | if (ret == 0) | |
148 | rtc_irq_bits = val; | |
149 | ||
150 | return ret; | |
151 | } | |
152 | ||
153 | static inline int twl4030_rtc_alarm_irq_set_state(int enabled) | |
154 | { | |
155 | int ret; | |
156 | ||
157 | if (enabled) | |
158 | ret = set_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M); | |
159 | else | |
160 | ret = mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M); | |
161 | ||
162 | return ret; | |
163 | } | |
164 | ||
165 | static inline int twl4030_rtc_irq_set_state(int enabled) | |
166 | { | |
167 | int ret; | |
168 | ||
169 | if (enabled) | |
170 | ret = set_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M); | |
171 | else | |
172 | ret = mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M); | |
173 | ||
174 | return ret; | |
175 | } | |
176 | ||
177 | /* | |
178 | * Gets current TWL4030 RTC time and date parameters. | |
179 | * | |
180 | * The RTC's time/alarm representation is not what gmtime(3) requires | |
181 | * Linux to use: | |
182 | * | |
183 | * - Months are 1..12 vs Linux 0-11 | |
184 | * - Years are 0..99 vs Linux 1900..N (we assume 21st century) | |
185 | */ | |
186 | static int twl4030_rtc_read_time(struct device *dev, struct rtc_time *tm) | |
187 | { | |
188 | unsigned char rtc_data[ALL_TIME_REGS + 1]; | |
189 | int ret; | |
190 | u8 save_control; | |
191 | ||
192 | ret = twl4030_rtc_read_u8(&save_control, REG_RTC_CTRL_REG); | |
193 | if (ret < 0) | |
194 | return ret; | |
195 | ||
196 | save_control |= BIT_RTC_CTRL_REG_GET_TIME_M; | |
197 | ||
198 | ret = twl4030_rtc_write_u8(save_control, REG_RTC_CTRL_REG); | |
199 | if (ret < 0) | |
200 | return ret; | |
201 | ||
202 | ret = twl4030_i2c_read(TWL4030_MODULE_RTC, rtc_data, | |
203 | REG_SECONDS_REG, ALL_TIME_REGS); | |
204 | ||
205 | if (ret < 0) { | |
206 | dev_err(dev, "rtc_read_time error %d\n", ret); | |
207 | return ret; | |
208 | } | |
209 | ||
210 | tm->tm_sec = bcd2bin(rtc_data[0]); | |
211 | tm->tm_min = bcd2bin(rtc_data[1]); | |
212 | tm->tm_hour = bcd2bin(rtc_data[2]); | |
213 | tm->tm_mday = bcd2bin(rtc_data[3]); | |
214 | tm->tm_mon = bcd2bin(rtc_data[4]) - 1; | |
215 | tm->tm_year = bcd2bin(rtc_data[5]) + 100; | |
216 | ||
217 | return ret; | |
218 | } | |
219 | ||
220 | static int twl4030_rtc_set_time(struct device *dev, struct rtc_time *tm) | |
221 | { | |
222 | unsigned char save_control; | |
223 | unsigned char rtc_data[ALL_TIME_REGS + 1]; | |
224 | int ret; | |
225 | ||
226 | rtc_data[1] = bin2bcd(tm->tm_sec); | |
227 | rtc_data[2] = bin2bcd(tm->tm_min); | |
228 | rtc_data[3] = bin2bcd(tm->tm_hour); | |
229 | rtc_data[4] = bin2bcd(tm->tm_mday); | |
230 | rtc_data[5] = bin2bcd(tm->tm_mon + 1); | |
231 | rtc_data[6] = bin2bcd(tm->tm_year - 100); | |
232 | ||
233 | /* Stop RTC while updating the TC registers */ | |
234 | ret = twl4030_rtc_read_u8(&save_control, REG_RTC_CTRL_REG); | |
235 | if (ret < 0) | |
236 | goto out; | |
237 | ||
238 | save_control &= ~BIT_RTC_CTRL_REG_STOP_RTC_M; | |
239 | twl4030_rtc_write_u8(save_control, REG_RTC_CTRL_REG); | |
240 | if (ret < 0) | |
241 | goto out; | |
242 | ||
243 | /* update all the time registers in one shot */ | |
244 | ret = twl4030_i2c_write(TWL4030_MODULE_RTC, rtc_data, | |
245 | REG_SECONDS_REG, ALL_TIME_REGS); | |
246 | if (ret < 0) { | |
247 | dev_err(dev, "rtc_set_time error %d\n", ret); | |
248 | goto out; | |
249 | } | |
250 | ||
251 | /* Start back RTC */ | |
252 | save_control |= BIT_RTC_CTRL_REG_STOP_RTC_M; | |
253 | ret = twl4030_rtc_write_u8(save_control, REG_RTC_CTRL_REG); | |
254 | ||
255 | out: | |
256 | return ret; | |
257 | } | |
258 | ||
259 | /* | |
260 | * Gets current TWL4030 RTC alarm time. | |
261 | */ | |
262 | static int twl4030_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) | |
263 | { | |
264 | unsigned char rtc_data[ALL_TIME_REGS + 1]; | |
265 | int ret; | |
266 | ||
267 | ret = twl4030_i2c_read(TWL4030_MODULE_RTC, rtc_data, | |
268 | REG_ALARM_SECONDS_REG, ALL_TIME_REGS); | |
269 | if (ret < 0) { | |
270 | dev_err(dev, "rtc_read_alarm error %d\n", ret); | |
271 | return ret; | |
272 | } | |
273 | ||
274 | /* some of these fields may be wildcard/"match all" */ | |
275 | alm->time.tm_sec = bcd2bin(rtc_data[0]); | |
276 | alm->time.tm_min = bcd2bin(rtc_data[1]); | |
277 | alm->time.tm_hour = bcd2bin(rtc_data[2]); | |
278 | alm->time.tm_mday = bcd2bin(rtc_data[3]); | |
279 | alm->time.tm_mon = bcd2bin(rtc_data[4]) - 1; | |
280 | alm->time.tm_year = bcd2bin(rtc_data[5]) + 100; | |
281 | ||
282 | /* report cached alarm enable state */ | |
283 | if (rtc_irq_bits & BIT_RTC_INTERRUPTS_REG_IT_ALARM_M) | |
284 | alm->enabled = 1; | |
285 | ||
286 | return ret; | |
287 | } | |
288 | ||
289 | static int twl4030_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) | |
290 | { | |
291 | unsigned char alarm_data[ALL_TIME_REGS + 1]; | |
292 | int ret; | |
293 | ||
294 | ret = twl4030_rtc_alarm_irq_set_state(0); | |
295 | if (ret) | |
296 | goto out; | |
297 | ||
298 | alarm_data[1] = bin2bcd(alm->time.tm_sec); | |
299 | alarm_data[2] = bin2bcd(alm->time.tm_min); | |
300 | alarm_data[3] = bin2bcd(alm->time.tm_hour); | |
301 | alarm_data[4] = bin2bcd(alm->time.tm_mday); | |
302 | alarm_data[5] = bin2bcd(alm->time.tm_mon + 1); | |
303 | alarm_data[6] = bin2bcd(alm->time.tm_year - 100); | |
304 | ||
305 | /* update all the alarm registers in one shot */ | |
306 | ret = twl4030_i2c_write(TWL4030_MODULE_RTC, alarm_data, | |
307 | REG_ALARM_SECONDS_REG, ALL_TIME_REGS); | |
308 | if (ret) { | |
309 | dev_err(dev, "rtc_set_alarm error %d\n", ret); | |
310 | goto out; | |
311 | } | |
312 | ||
313 | if (alm->enabled) | |
314 | ret = twl4030_rtc_alarm_irq_set_state(1); | |
315 | out: | |
316 | return ret; | |
317 | } | |
318 | ||
319 | #ifdef CONFIG_RTC_INTF_DEV | |
320 | ||
321 | static int twl4030_rtc_ioctl(struct device *dev, unsigned int cmd, | |
322 | unsigned long arg) | |
323 | { | |
324 | switch (cmd) { | |
325 | case RTC_AIE_OFF: | |
326 | return twl4030_rtc_alarm_irq_set_state(0); | |
327 | case RTC_AIE_ON: | |
328 | return twl4030_rtc_alarm_irq_set_state(1); | |
329 | case RTC_UIE_OFF: | |
330 | return twl4030_rtc_irq_set_state(0); | |
331 | case RTC_UIE_ON: | |
332 | return twl4030_rtc_irq_set_state(1); | |
333 | ||
334 | default: | |
335 | return -ENOIOCTLCMD; | |
336 | } | |
337 | } | |
338 | ||
339 | #else | |
340 | #define omap_rtc_ioctl NULL | |
341 | #endif | |
342 | ||
343 | static irqreturn_t twl4030_rtc_interrupt(int irq, void *rtc) | |
344 | { | |
345 | unsigned long events = 0; | |
346 | int ret = IRQ_NONE; | |
347 | int res; | |
348 | u8 rd_reg; | |
349 | ||
350 | #ifdef CONFIG_LOCKDEP | |
351 | /* WORKAROUND for lockdep forcing IRQF_DISABLED on us, which | |
352 | * we don't want and can't tolerate. Although it might be | |
353 | * friendlier not to borrow this thread context... | |
354 | */ | |
355 | local_irq_enable(); | |
356 | #endif | |
357 | ||
358 | res = twl4030_rtc_read_u8(&rd_reg, REG_RTC_STATUS_REG); | |
359 | if (res) | |
360 | goto out; | |
361 | /* | |
362 | * Figure out source of interrupt: ALARM or TIMER in RTC_STATUS_REG. | |
363 | * only one (ALARM or RTC) interrupt source may be enabled | |
364 | * at time, we also could check our results | |
365 | * by reading RTS_INTERRUPTS_REGISTER[IT_TIMER,IT_ALARM] | |
366 | */ | |
367 | if (rd_reg & BIT_RTC_STATUS_REG_ALARM_M) | |
368 | events |= RTC_IRQF | RTC_AF; | |
369 | else | |
370 | events |= RTC_IRQF | RTC_UF; | |
371 | ||
372 | res = twl4030_rtc_write_u8(rd_reg | BIT_RTC_STATUS_REG_ALARM_M, | |
373 | REG_RTC_STATUS_REG); | |
374 | if (res) | |
375 | goto out; | |
376 | ||
377 | /* Clear on Read enabled. RTC_IT bit of TWL4030_INT_PWR_ISR1 | |
378 | * needs 2 reads to clear the interrupt. One read is done in | |
379 | * do_twl4030_pwrirq(). Doing the second read, to clear | |
380 | * the bit. | |
381 | * | |
382 | * FIXME the reason PWR_ISR1 needs an extra read is that | |
383 | * RTC_IF retriggered until we cleared REG_ALARM_M above. | |
384 | * But re-reading like this is a bad hack; by doing so we | |
385 | * risk wrongly clearing status for some other IRQ (losing | |
386 | * the interrupt). Be smarter about handling RTC_UF ... | |
387 | */ | |
388 | res = twl4030_i2c_read_u8(TWL4030_MODULE_INT, | |
389 | &rd_reg, TWL4030_INT_PWR_ISR1); | |
390 | if (res) | |
391 | goto out; | |
392 | ||
393 | /* Notify RTC core on event */ | |
394 | rtc_update_irq(rtc, 1, events); | |
395 | ||
396 | ret = IRQ_HANDLED; | |
397 | out: | |
398 | return ret; | |
399 | } | |
400 | ||
401 | static struct rtc_class_ops twl4030_rtc_ops = { | |
402 | .ioctl = twl4030_rtc_ioctl, | |
403 | .read_time = twl4030_rtc_read_time, | |
404 | .set_time = twl4030_rtc_set_time, | |
405 | .read_alarm = twl4030_rtc_read_alarm, | |
406 | .set_alarm = twl4030_rtc_set_alarm, | |
407 | }; | |
408 | ||
409 | /*----------------------------------------------------------------------*/ | |
410 | ||
411 | static int __devinit twl4030_rtc_probe(struct platform_device *pdev) | |
412 | { | |
413 | struct rtc_device *rtc; | |
414 | int ret = 0; | |
415 | int irq = platform_get_irq(pdev, 0); | |
416 | u8 rd_reg; | |
417 | ||
418 | if (irq < 0) | |
419 | return irq; | |
420 | ||
421 | rtc = rtc_device_register(pdev->name, | |
422 | &pdev->dev, &twl4030_rtc_ops, THIS_MODULE); | |
423 | if (IS_ERR(rtc)) { | |
424 | ret = -EINVAL; | |
425 | dev_err(&pdev->dev, "can't register RTC device, err %ld\n", | |
426 | PTR_ERR(rtc)); | |
427 | goto out0; | |
428 | ||
429 | } | |
430 | ||
431 | platform_set_drvdata(pdev, rtc); | |
432 | ||
433 | ret = twl4030_rtc_read_u8(&rd_reg, REG_RTC_STATUS_REG); | |
434 | ||
435 | if (ret < 0) | |
436 | goto out1; | |
437 | ||
438 | if (rd_reg & BIT_RTC_STATUS_REG_POWER_UP_M) | |
439 | dev_warn(&pdev->dev, "Power up reset detected.\n"); | |
440 | ||
441 | if (rd_reg & BIT_RTC_STATUS_REG_ALARM_M) | |
442 | dev_warn(&pdev->dev, "Pending Alarm interrupt detected.\n"); | |
443 | ||
444 | /* Clear RTC Power up reset and pending alarm interrupts */ | |
445 | ret = twl4030_rtc_write_u8(rd_reg, REG_RTC_STATUS_REG); | |
446 | if (ret < 0) | |
447 | goto out1; | |
448 | ||
449 | ret = request_irq(irq, twl4030_rtc_interrupt, | |
450 | IRQF_TRIGGER_RISING, | |
451 | rtc->dev.bus_id, rtc); | |
452 | if (ret < 0) { | |
453 | dev_err(&pdev->dev, "IRQ is not free.\n"); | |
454 | goto out1; | |
455 | } | |
456 | ||
457 | /* Check RTC module status, Enable if it is off */ | |
458 | ret = twl4030_rtc_read_u8(&rd_reg, REG_RTC_CTRL_REG); | |
459 | if (ret < 0) | |
460 | goto out2; | |
461 | ||
462 | if (!(rd_reg & BIT_RTC_CTRL_REG_STOP_RTC_M)) { | |
463 | dev_info(&pdev->dev, "Enabling TWL4030-RTC.\n"); | |
464 | rd_reg = BIT_RTC_CTRL_REG_STOP_RTC_M; | |
465 | ret = twl4030_rtc_write_u8(rd_reg, REG_RTC_CTRL_REG); | |
466 | if (ret < 0) | |
467 | goto out2; | |
468 | } | |
469 | ||
470 | /* init cached IRQ enable bits */ | |
471 | ret = twl4030_rtc_read_u8(&rtc_irq_bits, REG_RTC_INTERRUPTS_REG); | |
472 | if (ret < 0) | |
473 | goto out2; | |
474 | ||
475 | return ret; | |
476 | ||
477 | ||
478 | out2: | |
479 | free_irq(irq, rtc); | |
480 | out1: | |
481 | rtc_device_unregister(rtc); | |
482 | out0: | |
483 | return ret; | |
484 | } | |
485 | ||
486 | /* | |
487 | * Disable all TWL4030 RTC module interrupts. | |
488 | * Sets status flag to free. | |
489 | */ | |
490 | static int __devexit twl4030_rtc_remove(struct platform_device *pdev) | |
491 | { | |
492 | /* leave rtc running, but disable irqs */ | |
493 | struct rtc_device *rtc = platform_get_drvdata(pdev); | |
494 | int irq = platform_get_irq(pdev, 0); | |
495 | ||
496 | mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M); | |
497 | mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M); | |
498 | ||
499 | free_irq(irq, rtc); | |
500 | ||
501 | rtc_device_unregister(rtc); | |
502 | platform_set_drvdata(pdev, NULL); | |
503 | return 0; | |
504 | } | |
505 | ||
506 | static void twl4030_rtc_shutdown(struct platform_device *pdev) | |
507 | { | |
508 | mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M | | |
509 | BIT_RTC_INTERRUPTS_REG_IT_ALARM_M); | |
510 | } | |
511 | ||
512 | #ifdef CONFIG_PM | |
513 | ||
514 | static unsigned char irqstat; | |
515 | ||
516 | static int twl4030_rtc_suspend(struct platform_device *pdev, pm_message_t state) | |
517 | { | |
518 | irqstat = rtc_irq_bits; | |
519 | ||
520 | /* REVISIT alarm may need to wake us from sleep */ | |
521 | mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M | | |
522 | BIT_RTC_INTERRUPTS_REG_IT_ALARM_M); | |
523 | return 0; | |
524 | } | |
525 | ||
526 | static int twl4030_rtc_resume(struct platform_device *pdev) | |
527 | { | |
528 | set_rtc_irq_bit(irqstat); | |
529 | return 0; | |
530 | } | |
531 | ||
532 | #else | |
533 | #define twl4030_rtc_suspend NULL | |
534 | #define twl4030_rtc_resume NULL | |
535 | #endif | |
536 | ||
537 | MODULE_ALIAS("platform:twl4030_rtc"); | |
538 | ||
539 | static struct platform_driver twl4030rtc_driver = { | |
540 | .probe = twl4030_rtc_probe, | |
541 | .remove = __devexit_p(twl4030_rtc_remove), | |
542 | .shutdown = twl4030_rtc_shutdown, | |
543 | .suspend = twl4030_rtc_suspend, | |
544 | .resume = twl4030_rtc_resume, | |
545 | .driver = { | |
546 | .owner = THIS_MODULE, | |
547 | .name = "twl4030_rtc", | |
548 | }, | |
549 | }; | |
550 | ||
551 | static int __init twl4030_rtc_init(void) | |
552 | { | |
553 | return platform_driver_register(&twl4030rtc_driver); | |
554 | } | |
555 | module_init(twl4030_rtc_init); | |
556 | ||
557 | static void __exit twl4030_rtc_exit(void) | |
558 | { | |
559 | platform_driver_unregister(&twl4030rtc_driver); | |
560 | } | |
561 | module_exit(twl4030_rtc_exit); | |
562 | ||
563 | MODULE_AUTHOR("Texas Instruments, MontaVista Software"); | |
564 | MODULE_LICENSE("GPL"); |