Commit | Line | Data |
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0146f261 FT |
1 | /* |
2 | * rtc-mrst.c: Driver for Moorestown virtual RTC | |
3 | * | |
4 | * (C) Copyright 2009 Intel Corporation | |
5 | * Author: Jacob Pan (jacob.jun.pan@intel.com) | |
6 | * Feng Tang (feng.tang@intel.com) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; version 2 | |
11 | * of the License. | |
12 | * | |
13 | * Note: | |
14 | * VRTC is emulated by system controller firmware, the real HW | |
15 | * RTC is located in the PMIC device. SCU FW shadows PMIC RTC | |
16 | * in a memory mapped IO space that is visible to the host IA | |
17 | * processor. | |
18 | * | |
19 | * This driver is based upon drivers/rtc/rtc-cmos.c | |
20 | */ | |
21 | ||
22 | /* | |
23 | * Note: | |
24 | * * vRTC only supports binary mode and 24H mode | |
25 | * * vRTC only support PIE and AIE, no UIE, and its PIE only happens | |
26 | * at 23:59:59pm everyday, no support for adjustable frequency | |
27 | * * Alarm function is also limited to hr/min/sec. | |
28 | */ | |
29 | ||
30 | #include <linux/mod_devicetable.h> | |
31 | #include <linux/platform_device.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/spinlock.h> | |
34 | #include <linux/kernel.h> | |
35 | #include <linux/module.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/sfi.h> | |
38 | ||
39 | #include <asm-generic/rtc.h> | |
40 | #include <asm/intel_scu_ipc.h> | |
05454c26 KS |
41 | #include <asm/intel-mid.h> |
42 | #include <asm/intel_mid_vrtc.h> | |
0146f261 FT |
43 | |
44 | struct mrst_rtc { | |
45 | struct rtc_device *rtc; | |
46 | struct device *dev; | |
47 | int irq; | |
48 | struct resource *iomem; | |
49 | ||
50 | u8 enabled_wake; | |
51 | u8 suspend_ctrl; | |
52 | }; | |
53 | ||
54 | static const char driver_name[] = "rtc_mrst"; | |
55 | ||
56 | #define RTC_IRQMASK (RTC_PF | RTC_AF) | |
57 | ||
58 | static inline int is_intr(u8 rtc_intr) | |
59 | { | |
60 | if (!(rtc_intr & RTC_IRQF)) | |
61 | return 0; | |
62 | return rtc_intr & RTC_IRQMASK; | |
63 | } | |
64 | ||
168202c7 FT |
65 | static inline unsigned char vrtc_is_updating(void) |
66 | { | |
67 | unsigned char uip; | |
68 | unsigned long flags; | |
69 | ||
70 | spin_lock_irqsave(&rtc_lock, flags); | |
71 | uip = (vrtc_cmos_read(RTC_FREQ_SELECT) & RTC_UIP); | |
72 | spin_unlock_irqrestore(&rtc_lock, flags); | |
73 | return uip; | |
74 | } | |
75 | ||
0146f261 FT |
76 | /* |
77 | * rtc_time's year contains the increment over 1900, but vRTC's YEAR | |
78 | * register can't be programmed to value larger than 0x64, so vRTC | |
57e6319d | 79 | * driver chose to use 1972 (1970 is UNIX time start point) as the base, |
d3e1884b FT |
80 | * and does the translation at read/write time. |
81 | * | |
57e6319d | 82 | * Why not just use 1970 as the offset? it's because using 1972 will |
d3e1884b | 83 | * make it consistent in leap year setting for both vrtc and low-level |
57e6319d FT |
84 | * physical rtc devices. Then why not use 1960 as the offset? If we use |
85 | * 1960, for a device's first use, its YEAR register is 0 and the system | |
86 | * year will be parsed as 1960 which is not a valid UNIX time and will | |
87 | * cause many applications to fail mysteriously. | |
0146f261 FT |
88 | */ |
89 | static int mrst_read_time(struct device *dev, struct rtc_time *time) | |
90 | { | |
91 | unsigned long flags; | |
92 | ||
168202c7 | 93 | if (vrtc_is_updating()) |
0146f261 FT |
94 | mdelay(20); |
95 | ||
96 | spin_lock_irqsave(&rtc_lock, flags); | |
97 | time->tm_sec = vrtc_cmos_read(RTC_SECONDS); | |
98 | time->tm_min = vrtc_cmos_read(RTC_MINUTES); | |
99 | time->tm_hour = vrtc_cmos_read(RTC_HOURS); | |
100 | time->tm_mday = vrtc_cmos_read(RTC_DAY_OF_MONTH); | |
101 | time->tm_mon = vrtc_cmos_read(RTC_MONTH); | |
102 | time->tm_year = vrtc_cmos_read(RTC_YEAR); | |
103 | spin_unlock_irqrestore(&rtc_lock, flags); | |
104 | ||
57e6319d FT |
105 | /* Adjust for the 1972/1900 */ |
106 | time->tm_year += 72; | |
0146f261 | 107 | time->tm_mon--; |
57e6319d | 108 | return rtc_valid_tm(time); |
0146f261 FT |
109 | } |
110 | ||
111 | static int mrst_set_time(struct device *dev, struct rtc_time *time) | |
112 | { | |
113 | int ret; | |
114 | unsigned long flags; | |
115 | unsigned char mon, day, hrs, min, sec; | |
116 | unsigned int yrs; | |
117 | ||
118 | yrs = time->tm_year; | |
119 | mon = time->tm_mon + 1; /* tm_mon starts at zero */ | |
120 | day = time->tm_mday; | |
121 | hrs = time->tm_hour; | |
122 | min = time->tm_min; | |
123 | sec = time->tm_sec; | |
124 | ||
57e6319d | 125 | if (yrs < 72 || yrs > 138) |
0146f261 | 126 | return -EINVAL; |
57e6319d | 127 | yrs -= 72; |
0146f261 FT |
128 | |
129 | spin_lock_irqsave(&rtc_lock, flags); | |
130 | ||
131 | vrtc_cmos_write(yrs, RTC_YEAR); | |
132 | vrtc_cmos_write(mon, RTC_MONTH); | |
133 | vrtc_cmos_write(day, RTC_DAY_OF_MONTH); | |
134 | vrtc_cmos_write(hrs, RTC_HOURS); | |
135 | vrtc_cmos_write(min, RTC_MINUTES); | |
136 | vrtc_cmos_write(sec, RTC_SECONDS); | |
137 | ||
138 | spin_unlock_irqrestore(&rtc_lock, flags); | |
139 | ||
140 | ret = intel_scu_ipc_simple_command(IPCMSG_VRTC, IPC_CMD_VRTC_SETTIME); | |
141 | return ret; | |
142 | } | |
143 | ||
144 | static int mrst_read_alarm(struct device *dev, struct rtc_wkalrm *t) | |
145 | { | |
146 | struct mrst_rtc *mrst = dev_get_drvdata(dev); | |
147 | unsigned char rtc_control; | |
148 | ||
149 | if (mrst->irq <= 0) | |
150 | return -EIO; | |
151 | ||
152 | /* Basic alarms only support hour, minute, and seconds fields. | |
153 | * Some also support day and month, for alarms up to a year in | |
154 | * the future. | |
155 | */ | |
156 | t->time.tm_mday = -1; | |
157 | t->time.tm_mon = -1; | |
158 | t->time.tm_year = -1; | |
159 | ||
160 | /* vRTC only supports binary mode */ | |
161 | spin_lock_irq(&rtc_lock); | |
162 | t->time.tm_sec = vrtc_cmos_read(RTC_SECONDS_ALARM); | |
163 | t->time.tm_min = vrtc_cmos_read(RTC_MINUTES_ALARM); | |
164 | t->time.tm_hour = vrtc_cmos_read(RTC_HOURS_ALARM); | |
165 | ||
166 | rtc_control = vrtc_cmos_read(RTC_CONTROL); | |
167 | spin_unlock_irq(&rtc_lock); | |
168 | ||
169 | t->enabled = !!(rtc_control & RTC_AIE); | |
170 | t->pending = 0; | |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
175 | static void mrst_checkintr(struct mrst_rtc *mrst, unsigned char rtc_control) | |
176 | { | |
177 | unsigned char rtc_intr; | |
178 | ||
179 | /* | |
180 | * NOTE after changing RTC_xIE bits we always read INTR_FLAGS; | |
181 | * allegedly some older rtcs need that to handle irqs properly | |
182 | */ | |
183 | rtc_intr = vrtc_cmos_read(RTC_INTR_FLAGS); | |
184 | rtc_intr &= (rtc_control & RTC_IRQMASK) | RTC_IRQF; | |
185 | if (is_intr(rtc_intr)) | |
186 | rtc_update_irq(mrst->rtc, 1, rtc_intr); | |
187 | } | |
188 | ||
189 | static void mrst_irq_enable(struct mrst_rtc *mrst, unsigned char mask) | |
190 | { | |
191 | unsigned char rtc_control; | |
192 | ||
193 | /* | |
194 | * Flush any pending IRQ status, notably for update irqs, | |
195 | * before we enable new IRQs | |
196 | */ | |
197 | rtc_control = vrtc_cmos_read(RTC_CONTROL); | |
198 | mrst_checkintr(mrst, rtc_control); | |
199 | ||
200 | rtc_control |= mask; | |
201 | vrtc_cmos_write(rtc_control, RTC_CONTROL); | |
202 | ||
203 | mrst_checkintr(mrst, rtc_control); | |
204 | } | |
205 | ||
206 | static void mrst_irq_disable(struct mrst_rtc *mrst, unsigned char mask) | |
207 | { | |
208 | unsigned char rtc_control; | |
209 | ||
210 | rtc_control = vrtc_cmos_read(RTC_CONTROL); | |
211 | rtc_control &= ~mask; | |
212 | vrtc_cmos_write(rtc_control, RTC_CONTROL); | |
213 | mrst_checkintr(mrst, rtc_control); | |
214 | } | |
215 | ||
216 | static int mrst_set_alarm(struct device *dev, struct rtc_wkalrm *t) | |
217 | { | |
218 | struct mrst_rtc *mrst = dev_get_drvdata(dev); | |
219 | unsigned char hrs, min, sec; | |
220 | int ret = 0; | |
221 | ||
222 | if (!mrst->irq) | |
223 | return -EIO; | |
224 | ||
225 | hrs = t->time.tm_hour; | |
226 | min = t->time.tm_min; | |
227 | sec = t->time.tm_sec; | |
228 | ||
229 | spin_lock_irq(&rtc_lock); | |
230 | /* Next rtc irq must not be from previous alarm setting */ | |
231 | mrst_irq_disable(mrst, RTC_AIE); | |
232 | ||
233 | /* Update alarm */ | |
234 | vrtc_cmos_write(hrs, RTC_HOURS_ALARM); | |
235 | vrtc_cmos_write(min, RTC_MINUTES_ALARM); | |
236 | vrtc_cmos_write(sec, RTC_SECONDS_ALARM); | |
237 | ||
238 | spin_unlock_irq(&rtc_lock); | |
239 | ||
240 | ret = intel_scu_ipc_simple_command(IPCMSG_VRTC, IPC_CMD_VRTC_SETALARM); | |
241 | if (ret) | |
242 | return ret; | |
243 | ||
244 | spin_lock_irq(&rtc_lock); | |
245 | if (t->enabled) | |
246 | mrst_irq_enable(mrst, RTC_AIE); | |
247 | ||
248 | spin_unlock_irq(&rtc_lock); | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
0146f261 | 253 | /* Currently, the vRTC doesn't support UIE ON/OFF */ |
16380c15 | 254 | static int mrst_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) |
0146f261 FT |
255 | { |
256 | struct mrst_rtc *mrst = dev_get_drvdata(dev); | |
257 | unsigned long flags; | |
258 | ||
0146f261 | 259 | spin_lock_irqsave(&rtc_lock, flags); |
16380c15 | 260 | if (enabled) |
0146f261 | 261 | mrst_irq_enable(mrst, RTC_AIE); |
16380c15 JS |
262 | else |
263 | mrst_irq_disable(mrst, RTC_AIE); | |
0146f261 FT |
264 | spin_unlock_irqrestore(&rtc_lock, flags); |
265 | return 0; | |
266 | } | |
267 | ||
0146f261 FT |
268 | |
269 | #if defined(CONFIG_RTC_INTF_PROC) || defined(CONFIG_RTC_INTF_PROC_MODULE) | |
270 | ||
271 | static int mrst_procfs(struct device *dev, struct seq_file *seq) | |
272 | { | |
273 | unsigned char rtc_control, valid; | |
274 | ||
275 | spin_lock_irq(&rtc_lock); | |
276 | rtc_control = vrtc_cmos_read(RTC_CONTROL); | |
277 | valid = vrtc_cmos_read(RTC_VALID); | |
278 | spin_unlock_irq(&rtc_lock); | |
279 | ||
280 | return seq_printf(seq, | |
281 | "periodic_IRQ\t: %s\n" | |
282 | "alarm\t\t: %s\n" | |
283 | "BCD\t\t: no\n" | |
284 | "periodic_freq\t: daily (not adjustable)\n", | |
285 | (rtc_control & RTC_PIE) ? "on" : "off", | |
286 | (rtc_control & RTC_AIE) ? "on" : "off"); | |
287 | } | |
288 | ||
289 | #else | |
290 | #define mrst_procfs NULL | |
291 | #endif | |
292 | ||
293 | static const struct rtc_class_ops mrst_rtc_ops = { | |
0146f261 FT |
294 | .read_time = mrst_read_time, |
295 | .set_time = mrst_set_time, | |
296 | .read_alarm = mrst_read_alarm, | |
297 | .set_alarm = mrst_set_alarm, | |
298 | .proc = mrst_procfs, | |
16380c15 | 299 | .alarm_irq_enable = mrst_rtc_alarm_irq_enable, |
0146f261 FT |
300 | }; |
301 | ||
302 | static struct mrst_rtc mrst_rtc; | |
303 | ||
304 | /* | |
305 | * When vRTC IRQ is captured by SCU FW, FW will clear the AIE bit in | |
306 | * Reg B, so no need for this driver to clear it | |
307 | */ | |
308 | static irqreturn_t mrst_rtc_irq(int irq, void *p) | |
309 | { | |
310 | u8 irqstat; | |
311 | ||
312 | spin_lock(&rtc_lock); | |
313 | /* This read will clear all IRQ flags inside Reg C */ | |
314 | irqstat = vrtc_cmos_read(RTC_INTR_FLAGS); | |
315 | spin_unlock(&rtc_lock); | |
316 | ||
317 | irqstat &= RTC_IRQMASK | RTC_IRQF; | |
318 | if (is_intr(irqstat)) { | |
319 | rtc_update_irq(p, 1, irqstat); | |
320 | return IRQ_HANDLED; | |
321 | } | |
322 | return IRQ_NONE; | |
323 | } | |
324 | ||
5a167f45 GKH |
325 | static int vrtc_mrst_do_probe(struct device *dev, struct resource *iomem, |
326 | int rtc_irq) | |
0146f261 FT |
327 | { |
328 | int retval = 0; | |
329 | unsigned char rtc_control; | |
330 | ||
331 | /* There can be only one ... */ | |
332 | if (mrst_rtc.dev) | |
333 | return -EBUSY; | |
334 | ||
335 | if (!iomem) | |
336 | return -ENODEV; | |
337 | ||
28f65c11 JP |
338 | iomem = request_mem_region(iomem->start, resource_size(iomem), |
339 | driver_name); | |
0146f261 FT |
340 | if (!iomem) { |
341 | dev_dbg(dev, "i/o mem already in use.\n"); | |
342 | return -EBUSY; | |
343 | } | |
344 | ||
345 | mrst_rtc.irq = rtc_irq; | |
346 | mrst_rtc.iomem = iomem; | |
de97a21a FT |
347 | mrst_rtc.dev = dev; |
348 | dev_set_drvdata(dev, &mrst_rtc); | |
0146f261 FT |
349 | |
350 | mrst_rtc.rtc = rtc_device_register(driver_name, dev, | |
351 | &mrst_rtc_ops, THIS_MODULE); | |
352 | if (IS_ERR(mrst_rtc.rtc)) { | |
353 | retval = PTR_ERR(mrst_rtc.rtc); | |
354 | goto cleanup0; | |
355 | } | |
356 | ||
0146f261 FT |
357 | rename_region(iomem, dev_name(&mrst_rtc.rtc->dev)); |
358 | ||
359 | spin_lock_irq(&rtc_lock); | |
360 | mrst_irq_disable(&mrst_rtc, RTC_PIE | RTC_AIE); | |
361 | rtc_control = vrtc_cmos_read(RTC_CONTROL); | |
362 | spin_unlock_irq(&rtc_lock); | |
363 | ||
364 | if (!(rtc_control & RTC_24H) || (rtc_control & (RTC_DM_BINARY))) | |
365 | dev_dbg(dev, "TODO: support more than 24-hr BCD mode\n"); | |
366 | ||
367 | if (rtc_irq) { | |
368 | retval = request_irq(rtc_irq, mrst_rtc_irq, | |
2f6e5f94 | 369 | 0, dev_name(&mrst_rtc.rtc->dev), |
0146f261 FT |
370 | mrst_rtc.rtc); |
371 | if (retval < 0) { | |
372 | dev_dbg(dev, "IRQ %d is already in use, err %d\n", | |
373 | rtc_irq, retval); | |
374 | goto cleanup1; | |
375 | } | |
376 | } | |
377 | dev_dbg(dev, "initialised\n"); | |
378 | return 0; | |
379 | ||
380 | cleanup1: | |
0146f261 FT |
381 | rtc_device_unregister(mrst_rtc.rtc); |
382 | cleanup0: | |
de97a21a | 383 | mrst_rtc.dev = NULL; |
c258f9a0 | 384 | release_mem_region(iomem->start, resource_size(iomem)); |
0146f261 FT |
385 | dev_err(dev, "rtc-mrst: unable to initialise\n"); |
386 | return retval; | |
387 | } | |
388 | ||
389 | static void rtc_mrst_do_shutdown(void) | |
390 | { | |
391 | spin_lock_irq(&rtc_lock); | |
392 | mrst_irq_disable(&mrst_rtc, RTC_IRQMASK); | |
393 | spin_unlock_irq(&rtc_lock); | |
394 | } | |
395 | ||
5a167f45 | 396 | static void rtc_mrst_do_remove(struct device *dev) |
0146f261 FT |
397 | { |
398 | struct mrst_rtc *mrst = dev_get_drvdata(dev); | |
399 | struct resource *iomem; | |
400 | ||
401 | rtc_mrst_do_shutdown(); | |
402 | ||
403 | if (mrst->irq) | |
404 | free_irq(mrst->irq, mrst->rtc); | |
405 | ||
406 | rtc_device_unregister(mrst->rtc); | |
407 | mrst->rtc = NULL; | |
408 | ||
409 | iomem = mrst->iomem; | |
c258f9a0 | 410 | release_mem_region(iomem->start, resource_size(iomem)); |
0146f261 FT |
411 | mrst->iomem = NULL; |
412 | ||
413 | mrst->dev = NULL; | |
0146f261 FT |
414 | } |
415 | ||
416 | #ifdef CONFIG_PM | |
417 | static int mrst_suspend(struct device *dev, pm_message_t mesg) | |
418 | { | |
419 | struct mrst_rtc *mrst = dev_get_drvdata(dev); | |
420 | unsigned char tmp; | |
421 | ||
422 | /* Only the alarm might be a wakeup event source */ | |
423 | spin_lock_irq(&rtc_lock); | |
424 | mrst->suspend_ctrl = tmp = vrtc_cmos_read(RTC_CONTROL); | |
425 | if (tmp & (RTC_PIE | RTC_AIE)) { | |
426 | unsigned char mask; | |
427 | ||
428 | if (device_may_wakeup(dev)) | |
429 | mask = RTC_IRQMASK & ~RTC_AIE; | |
430 | else | |
431 | mask = RTC_IRQMASK; | |
432 | tmp &= ~mask; | |
433 | vrtc_cmos_write(tmp, RTC_CONTROL); | |
434 | ||
435 | mrst_checkintr(mrst, tmp); | |
436 | } | |
437 | spin_unlock_irq(&rtc_lock); | |
438 | ||
439 | if (tmp & RTC_AIE) { | |
440 | mrst->enabled_wake = 1; | |
441 | enable_irq_wake(mrst->irq); | |
442 | } | |
443 | ||
444 | dev_dbg(&mrst_rtc.rtc->dev, "suspend%s, ctrl %02x\n", | |
445 | (tmp & RTC_AIE) ? ", alarm may wake" : "", | |
446 | tmp); | |
447 | ||
448 | return 0; | |
449 | } | |
450 | ||
451 | /* | |
452 | * We want RTC alarms to wake us from the deep power saving state | |
453 | */ | |
454 | static inline int mrst_poweroff(struct device *dev) | |
455 | { | |
456 | return mrst_suspend(dev, PMSG_HIBERNATE); | |
457 | } | |
458 | ||
459 | static int mrst_resume(struct device *dev) | |
460 | { | |
461 | struct mrst_rtc *mrst = dev_get_drvdata(dev); | |
462 | unsigned char tmp = mrst->suspend_ctrl; | |
463 | ||
464 | /* Re-enable any irqs previously active */ | |
465 | if (tmp & RTC_IRQMASK) { | |
466 | unsigned char mask; | |
467 | ||
468 | if (mrst->enabled_wake) { | |
469 | disable_irq_wake(mrst->irq); | |
470 | mrst->enabled_wake = 0; | |
471 | } | |
472 | ||
473 | spin_lock_irq(&rtc_lock); | |
474 | do { | |
475 | vrtc_cmos_write(tmp, RTC_CONTROL); | |
476 | ||
477 | mask = vrtc_cmos_read(RTC_INTR_FLAGS); | |
478 | mask &= (tmp & RTC_IRQMASK) | RTC_IRQF; | |
479 | if (!is_intr(mask)) | |
480 | break; | |
481 | ||
482 | rtc_update_irq(mrst->rtc, 1, mask); | |
483 | tmp &= ~RTC_AIE; | |
484 | } while (mask & RTC_AIE); | |
485 | spin_unlock_irq(&rtc_lock); | |
486 | } | |
487 | ||
488 | dev_dbg(&mrst_rtc.rtc->dev, "resume, ctrl %02x\n", tmp); | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
493 | #else | |
494 | #define mrst_suspend NULL | |
495 | #define mrst_resume NULL | |
496 | ||
497 | static inline int mrst_poweroff(struct device *dev) | |
498 | { | |
499 | return -ENOSYS; | |
500 | } | |
501 | ||
502 | #endif | |
503 | ||
5a167f45 | 504 | static int vrtc_mrst_platform_probe(struct platform_device *pdev) |
0146f261 FT |
505 | { |
506 | return vrtc_mrst_do_probe(&pdev->dev, | |
507 | platform_get_resource(pdev, IORESOURCE_MEM, 0), | |
508 | platform_get_irq(pdev, 0)); | |
509 | } | |
510 | ||
5a167f45 | 511 | static int vrtc_mrst_platform_remove(struct platform_device *pdev) |
0146f261 FT |
512 | { |
513 | rtc_mrst_do_remove(&pdev->dev); | |
514 | return 0; | |
515 | } | |
516 | ||
517 | static void vrtc_mrst_platform_shutdown(struct platform_device *pdev) | |
518 | { | |
519 | if (system_state == SYSTEM_POWER_OFF && !mrst_poweroff(&pdev->dev)) | |
520 | return; | |
521 | ||
522 | rtc_mrst_do_shutdown(); | |
523 | } | |
524 | ||
525 | MODULE_ALIAS("platform:vrtc_mrst"); | |
526 | ||
527 | static struct platform_driver vrtc_mrst_platform_driver = { | |
528 | .probe = vrtc_mrst_platform_probe, | |
5a167f45 | 529 | .remove = vrtc_mrst_platform_remove, |
0146f261 FT |
530 | .shutdown = vrtc_mrst_platform_shutdown, |
531 | .driver = { | |
532 | .name = (char *) driver_name, | |
533 | .suspend = mrst_suspend, | |
534 | .resume = mrst_resume, | |
535 | } | |
536 | }; | |
537 | ||
0c4eae66 | 538 | module_platform_driver(vrtc_mrst_platform_driver); |
0146f261 FT |
539 | |
540 | MODULE_AUTHOR("Jacob Pan; Feng Tang"); | |
541 | MODULE_DESCRIPTION("Driver for Moorestown virtual RTC"); | |
542 | MODULE_LICENSE("GPL"); |