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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> | |
463a8630 | 35 | #include <linux/mc146818rtc.h> |
0146f261 FT |
36 | #include <linux/module.h> |
37 | #include <linux/init.h> | |
38 | #include <linux/sfi.h> | |
39 | ||
0146f261 | 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 | ||
0146f261 FT |
152 | /* vRTC only supports binary mode */ |
153 | spin_lock_irq(&rtc_lock); | |
154 | t->time.tm_sec = vrtc_cmos_read(RTC_SECONDS_ALARM); | |
155 | t->time.tm_min = vrtc_cmos_read(RTC_MINUTES_ALARM); | |
156 | t->time.tm_hour = vrtc_cmos_read(RTC_HOURS_ALARM); | |
157 | ||
158 | rtc_control = vrtc_cmos_read(RTC_CONTROL); | |
159 | spin_unlock_irq(&rtc_lock); | |
160 | ||
161 | t->enabled = !!(rtc_control & RTC_AIE); | |
162 | t->pending = 0; | |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
167 | static void mrst_checkintr(struct mrst_rtc *mrst, unsigned char rtc_control) | |
168 | { | |
169 | unsigned char rtc_intr; | |
170 | ||
171 | /* | |
172 | * NOTE after changing RTC_xIE bits we always read INTR_FLAGS; | |
173 | * allegedly some older rtcs need that to handle irqs properly | |
174 | */ | |
175 | rtc_intr = vrtc_cmos_read(RTC_INTR_FLAGS); | |
176 | rtc_intr &= (rtc_control & RTC_IRQMASK) | RTC_IRQF; | |
177 | if (is_intr(rtc_intr)) | |
178 | rtc_update_irq(mrst->rtc, 1, rtc_intr); | |
179 | } | |
180 | ||
181 | static void mrst_irq_enable(struct mrst_rtc *mrst, unsigned char mask) | |
182 | { | |
183 | unsigned char rtc_control; | |
184 | ||
185 | /* | |
186 | * Flush any pending IRQ status, notably for update irqs, | |
187 | * before we enable new IRQs | |
188 | */ | |
189 | rtc_control = vrtc_cmos_read(RTC_CONTROL); | |
190 | mrst_checkintr(mrst, rtc_control); | |
191 | ||
192 | rtc_control |= mask; | |
193 | vrtc_cmos_write(rtc_control, RTC_CONTROL); | |
194 | ||
195 | mrst_checkintr(mrst, rtc_control); | |
196 | } | |
197 | ||
198 | static void mrst_irq_disable(struct mrst_rtc *mrst, unsigned char mask) | |
199 | { | |
200 | unsigned char rtc_control; | |
201 | ||
202 | rtc_control = vrtc_cmos_read(RTC_CONTROL); | |
203 | rtc_control &= ~mask; | |
204 | vrtc_cmos_write(rtc_control, RTC_CONTROL); | |
205 | mrst_checkintr(mrst, rtc_control); | |
206 | } | |
207 | ||
208 | static int mrst_set_alarm(struct device *dev, struct rtc_wkalrm *t) | |
209 | { | |
210 | struct mrst_rtc *mrst = dev_get_drvdata(dev); | |
211 | unsigned char hrs, min, sec; | |
212 | int ret = 0; | |
213 | ||
214 | if (!mrst->irq) | |
215 | return -EIO; | |
216 | ||
217 | hrs = t->time.tm_hour; | |
218 | min = t->time.tm_min; | |
219 | sec = t->time.tm_sec; | |
220 | ||
221 | spin_lock_irq(&rtc_lock); | |
222 | /* Next rtc irq must not be from previous alarm setting */ | |
223 | mrst_irq_disable(mrst, RTC_AIE); | |
224 | ||
225 | /* Update alarm */ | |
226 | vrtc_cmos_write(hrs, RTC_HOURS_ALARM); | |
227 | vrtc_cmos_write(min, RTC_MINUTES_ALARM); | |
228 | vrtc_cmos_write(sec, RTC_SECONDS_ALARM); | |
229 | ||
230 | spin_unlock_irq(&rtc_lock); | |
231 | ||
232 | ret = intel_scu_ipc_simple_command(IPCMSG_VRTC, IPC_CMD_VRTC_SETALARM); | |
233 | if (ret) | |
234 | return ret; | |
235 | ||
236 | spin_lock_irq(&rtc_lock); | |
237 | if (t->enabled) | |
238 | mrst_irq_enable(mrst, RTC_AIE); | |
239 | ||
240 | spin_unlock_irq(&rtc_lock); | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
0146f261 | 245 | /* Currently, the vRTC doesn't support UIE ON/OFF */ |
16380c15 | 246 | static int mrst_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) |
0146f261 FT |
247 | { |
248 | struct mrst_rtc *mrst = dev_get_drvdata(dev); | |
249 | unsigned long flags; | |
250 | ||
0146f261 | 251 | spin_lock_irqsave(&rtc_lock, flags); |
16380c15 | 252 | if (enabled) |
0146f261 | 253 | mrst_irq_enable(mrst, RTC_AIE); |
16380c15 JS |
254 | else |
255 | mrst_irq_disable(mrst, RTC_AIE); | |
0146f261 FT |
256 | spin_unlock_irqrestore(&rtc_lock, flags); |
257 | return 0; | |
258 | } | |
259 | ||
0146f261 | 260 | |
6fca3fc5 | 261 | #if IS_ENABLED(CONFIG_RTC_INTF_PROC) |
0146f261 FT |
262 | |
263 | static int mrst_procfs(struct device *dev, struct seq_file *seq) | |
264 | { | |
265 | unsigned char rtc_control, valid; | |
266 | ||
267 | spin_lock_irq(&rtc_lock); | |
268 | rtc_control = vrtc_cmos_read(RTC_CONTROL); | |
269 | valid = vrtc_cmos_read(RTC_VALID); | |
270 | spin_unlock_irq(&rtc_lock); | |
271 | ||
4395eb1f JP |
272 | seq_printf(seq, |
273 | "periodic_IRQ\t: %s\n" | |
274 | "alarm\t\t: %s\n" | |
275 | "BCD\t\t: no\n" | |
276 | "periodic_freq\t: daily (not adjustable)\n", | |
277 | (rtc_control & RTC_PIE) ? "on" : "off", | |
278 | (rtc_control & RTC_AIE) ? "on" : "off"); | |
279 | ||
280 | return 0; | |
0146f261 FT |
281 | } |
282 | ||
283 | #else | |
284 | #define mrst_procfs NULL | |
285 | #endif | |
286 | ||
287 | static const struct rtc_class_ops mrst_rtc_ops = { | |
0146f261 FT |
288 | .read_time = mrst_read_time, |
289 | .set_time = mrst_set_time, | |
290 | .read_alarm = mrst_read_alarm, | |
291 | .set_alarm = mrst_set_alarm, | |
292 | .proc = mrst_procfs, | |
16380c15 | 293 | .alarm_irq_enable = mrst_rtc_alarm_irq_enable, |
0146f261 FT |
294 | }; |
295 | ||
296 | static struct mrst_rtc mrst_rtc; | |
297 | ||
298 | /* | |
299 | * When vRTC IRQ is captured by SCU FW, FW will clear the AIE bit in | |
300 | * Reg B, so no need for this driver to clear it | |
301 | */ | |
302 | static irqreturn_t mrst_rtc_irq(int irq, void *p) | |
303 | { | |
304 | u8 irqstat; | |
305 | ||
306 | spin_lock(&rtc_lock); | |
307 | /* This read will clear all IRQ flags inside Reg C */ | |
308 | irqstat = vrtc_cmos_read(RTC_INTR_FLAGS); | |
309 | spin_unlock(&rtc_lock); | |
310 | ||
311 | irqstat &= RTC_IRQMASK | RTC_IRQF; | |
312 | if (is_intr(irqstat)) { | |
313 | rtc_update_irq(p, 1, irqstat); | |
314 | return IRQ_HANDLED; | |
315 | } | |
316 | return IRQ_NONE; | |
317 | } | |
318 | ||
5a167f45 GKH |
319 | static int vrtc_mrst_do_probe(struct device *dev, struct resource *iomem, |
320 | int rtc_irq) | |
0146f261 FT |
321 | { |
322 | int retval = 0; | |
323 | unsigned char rtc_control; | |
324 | ||
325 | /* There can be only one ... */ | |
326 | if (mrst_rtc.dev) | |
327 | return -EBUSY; | |
328 | ||
329 | if (!iomem) | |
330 | return -ENODEV; | |
331 | ||
28f65c11 JP |
332 | iomem = request_mem_region(iomem->start, resource_size(iomem), |
333 | driver_name); | |
0146f261 FT |
334 | if (!iomem) { |
335 | dev_dbg(dev, "i/o mem already in use.\n"); | |
336 | return -EBUSY; | |
337 | } | |
338 | ||
339 | mrst_rtc.irq = rtc_irq; | |
340 | mrst_rtc.iomem = iomem; | |
de97a21a FT |
341 | mrst_rtc.dev = dev; |
342 | dev_set_drvdata(dev, &mrst_rtc); | |
0146f261 FT |
343 | |
344 | mrst_rtc.rtc = rtc_device_register(driver_name, dev, | |
345 | &mrst_rtc_ops, THIS_MODULE); | |
346 | if (IS_ERR(mrst_rtc.rtc)) { | |
347 | retval = PTR_ERR(mrst_rtc.rtc); | |
348 | goto cleanup0; | |
349 | } | |
350 | ||
0146f261 FT |
351 | rename_region(iomem, dev_name(&mrst_rtc.rtc->dev)); |
352 | ||
353 | spin_lock_irq(&rtc_lock); | |
354 | mrst_irq_disable(&mrst_rtc, RTC_PIE | RTC_AIE); | |
355 | rtc_control = vrtc_cmos_read(RTC_CONTROL); | |
356 | spin_unlock_irq(&rtc_lock); | |
357 | ||
358 | if (!(rtc_control & RTC_24H) || (rtc_control & (RTC_DM_BINARY))) | |
359 | dev_dbg(dev, "TODO: support more than 24-hr BCD mode\n"); | |
360 | ||
361 | if (rtc_irq) { | |
362 | retval = request_irq(rtc_irq, mrst_rtc_irq, | |
2f6e5f94 | 363 | 0, dev_name(&mrst_rtc.rtc->dev), |
0146f261 FT |
364 | mrst_rtc.rtc); |
365 | if (retval < 0) { | |
366 | dev_dbg(dev, "IRQ %d is already in use, err %d\n", | |
367 | rtc_irq, retval); | |
368 | goto cleanup1; | |
369 | } | |
370 | } | |
371 | dev_dbg(dev, "initialised\n"); | |
372 | return 0; | |
373 | ||
374 | cleanup1: | |
0146f261 FT |
375 | rtc_device_unregister(mrst_rtc.rtc); |
376 | cleanup0: | |
de97a21a | 377 | mrst_rtc.dev = NULL; |
c258f9a0 | 378 | release_mem_region(iomem->start, resource_size(iomem)); |
0146f261 FT |
379 | dev_err(dev, "rtc-mrst: unable to initialise\n"); |
380 | return retval; | |
381 | } | |
382 | ||
383 | static void rtc_mrst_do_shutdown(void) | |
384 | { | |
385 | spin_lock_irq(&rtc_lock); | |
386 | mrst_irq_disable(&mrst_rtc, RTC_IRQMASK); | |
387 | spin_unlock_irq(&rtc_lock); | |
388 | } | |
389 | ||
5a167f45 | 390 | static void rtc_mrst_do_remove(struct device *dev) |
0146f261 FT |
391 | { |
392 | struct mrst_rtc *mrst = dev_get_drvdata(dev); | |
393 | struct resource *iomem; | |
394 | ||
395 | rtc_mrst_do_shutdown(); | |
396 | ||
397 | if (mrst->irq) | |
398 | free_irq(mrst->irq, mrst->rtc); | |
399 | ||
400 | rtc_device_unregister(mrst->rtc); | |
401 | mrst->rtc = NULL; | |
402 | ||
403 | iomem = mrst->iomem; | |
c258f9a0 | 404 | release_mem_region(iomem->start, resource_size(iomem)); |
0146f261 FT |
405 | mrst->iomem = NULL; |
406 | ||
407 | mrst->dev = NULL; | |
0146f261 FT |
408 | } |
409 | ||
ddd2a30d LPC |
410 | #ifdef CONFIG_PM_SLEEP |
411 | static int mrst_suspend(struct device *dev) | |
0146f261 FT |
412 | { |
413 | struct mrst_rtc *mrst = dev_get_drvdata(dev); | |
414 | unsigned char tmp; | |
415 | ||
416 | /* Only the alarm might be a wakeup event source */ | |
417 | spin_lock_irq(&rtc_lock); | |
418 | mrst->suspend_ctrl = tmp = vrtc_cmos_read(RTC_CONTROL); | |
419 | if (tmp & (RTC_PIE | RTC_AIE)) { | |
420 | unsigned char mask; | |
421 | ||
422 | if (device_may_wakeup(dev)) | |
423 | mask = RTC_IRQMASK & ~RTC_AIE; | |
424 | else | |
425 | mask = RTC_IRQMASK; | |
426 | tmp &= ~mask; | |
427 | vrtc_cmos_write(tmp, RTC_CONTROL); | |
428 | ||
429 | mrst_checkintr(mrst, tmp); | |
430 | } | |
431 | spin_unlock_irq(&rtc_lock); | |
432 | ||
433 | if (tmp & RTC_AIE) { | |
434 | mrst->enabled_wake = 1; | |
435 | enable_irq_wake(mrst->irq); | |
436 | } | |
437 | ||
438 | dev_dbg(&mrst_rtc.rtc->dev, "suspend%s, ctrl %02x\n", | |
439 | (tmp & RTC_AIE) ? ", alarm may wake" : "", | |
440 | tmp); | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
445 | /* | |
446 | * We want RTC alarms to wake us from the deep power saving state | |
447 | */ | |
448 | static inline int mrst_poweroff(struct device *dev) | |
449 | { | |
ddd2a30d | 450 | return mrst_suspend(dev); |
0146f261 FT |
451 | } |
452 | ||
453 | static int mrst_resume(struct device *dev) | |
454 | { | |
455 | struct mrst_rtc *mrst = dev_get_drvdata(dev); | |
456 | unsigned char tmp = mrst->suspend_ctrl; | |
457 | ||
458 | /* Re-enable any irqs previously active */ | |
459 | if (tmp & RTC_IRQMASK) { | |
460 | unsigned char mask; | |
461 | ||
462 | if (mrst->enabled_wake) { | |
463 | disable_irq_wake(mrst->irq); | |
464 | mrst->enabled_wake = 0; | |
465 | } | |
466 | ||
467 | spin_lock_irq(&rtc_lock); | |
468 | do { | |
469 | vrtc_cmos_write(tmp, RTC_CONTROL); | |
470 | ||
471 | mask = vrtc_cmos_read(RTC_INTR_FLAGS); | |
472 | mask &= (tmp & RTC_IRQMASK) | RTC_IRQF; | |
473 | if (!is_intr(mask)) | |
474 | break; | |
475 | ||
476 | rtc_update_irq(mrst->rtc, 1, mask); | |
477 | tmp &= ~RTC_AIE; | |
478 | } while (mask & RTC_AIE); | |
479 | spin_unlock_irq(&rtc_lock); | |
480 | } | |
481 | ||
482 | dev_dbg(&mrst_rtc.rtc->dev, "resume, ctrl %02x\n", tmp); | |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
ddd2a30d LPC |
487 | static SIMPLE_DEV_PM_OPS(mrst_pm_ops, mrst_suspend, mrst_resume); |
488 | #define MRST_PM_OPS (&mrst_pm_ops) | |
489 | ||
0146f261 | 490 | #else |
ddd2a30d | 491 | #define MRST_PM_OPS NULL |
0146f261 FT |
492 | |
493 | static inline int mrst_poweroff(struct device *dev) | |
494 | { | |
495 | return -ENOSYS; | |
496 | } | |
497 | ||
498 | #endif | |
499 | ||
5a167f45 | 500 | static int vrtc_mrst_platform_probe(struct platform_device *pdev) |
0146f261 FT |
501 | { |
502 | return vrtc_mrst_do_probe(&pdev->dev, | |
503 | platform_get_resource(pdev, IORESOURCE_MEM, 0), | |
504 | platform_get_irq(pdev, 0)); | |
505 | } | |
506 | ||
5a167f45 | 507 | static int vrtc_mrst_platform_remove(struct platform_device *pdev) |
0146f261 FT |
508 | { |
509 | rtc_mrst_do_remove(&pdev->dev); | |
510 | return 0; | |
511 | } | |
512 | ||
513 | static void vrtc_mrst_platform_shutdown(struct platform_device *pdev) | |
514 | { | |
515 | if (system_state == SYSTEM_POWER_OFF && !mrst_poweroff(&pdev->dev)) | |
516 | return; | |
517 | ||
518 | rtc_mrst_do_shutdown(); | |
519 | } | |
520 | ||
521 | MODULE_ALIAS("platform:vrtc_mrst"); | |
522 | ||
523 | static struct platform_driver vrtc_mrst_platform_driver = { | |
524 | .probe = vrtc_mrst_platform_probe, | |
5a167f45 | 525 | .remove = vrtc_mrst_platform_remove, |
0146f261 FT |
526 | .shutdown = vrtc_mrst_platform_shutdown, |
527 | .driver = { | |
ddd2a30d LPC |
528 | .name = driver_name, |
529 | .pm = MRST_PM_OPS, | |
0146f261 FT |
530 | } |
531 | }; | |
532 | ||
0c4eae66 | 533 | module_platform_driver(vrtc_mrst_platform_driver); |
0146f261 FT |
534 | |
535 | MODULE_AUTHOR("Jacob Pan; Feng Tang"); | |
536 | MODULE_DESCRIPTION("Driver for Moorestown virtual RTC"); | |
537 | MODULE_LICENSE("GPL"); |