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cdf7545a | 1 | // SPDX-License-Identifier: GPL-2.0 |
0c86edc0 AZ |
2 | /* |
3 | * RTC subsystem, base class | |
4 | * | |
5 | * Copyright (C) 2005 Tower Technologies | |
6 | * Author: Alessandro Zummo <a.zummo@towertech.it> | |
7 | * | |
8 | * class skeleton from drivers/hwmon/hwmon.c | |
cdf7545a | 9 | */ |
0c86edc0 | 10 | |
c100a5e0 JH |
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
12 | ||
0c86edc0 | 13 | #include <linux/module.h> |
9d2b7e53 | 14 | #include <linux/of.h> |
0c86edc0 AZ |
15 | #include <linux/rtc.h> |
16 | #include <linux/kdev_t.h> | |
17 | #include <linux/idr.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
6610e089 | 19 | #include <linux/workqueue.h> |
0c86edc0 | 20 | |
5726fb20 DB |
21 | #include "rtc-core.h" |
22 | ||
6d03d06d | 23 | static DEFINE_IDA(rtc_ida); |
0c86edc0 AZ |
24 | struct class *rtc_class; |
25 | ||
cd966209 | 26 | static void rtc_device_release(struct device *dev) |
0c86edc0 | 27 | { |
cd966209 | 28 | struct rtc_device *rtc = to_rtc_device(dev); |
c8fa17d9 VW |
29 | struct timerqueue_head *head = &rtc->timerqueue; |
30 | struct timerqueue_node *node; | |
31 | ||
32 | mutex_lock(&rtc->ops_lock); | |
33 | while ((node = timerqueue_getnext(head))) | |
34 | timerqueue_del(head, node); | |
35 | mutex_unlock(&rtc->ops_lock); | |
36 | ||
37 | cancel_work_sync(&rtc->irqwork); | |
606cc43c | 38 | |
592ff0c8 | 39 | ida_free(&rtc_ida, rtc->id); |
0d6d7a39 | 40 | mutex_destroy(&rtc->ops_lock); |
0c86edc0 AZ |
41 | kfree(rtc); |
42 | } | |
43 | ||
4c24e29e DF |
44 | #ifdef CONFIG_RTC_HCTOSYS_DEVICE |
45 | /* Result of the last RTC to system clock attempt. */ | |
46 | int rtc_hctosys_ret = -ENODEV; | |
f9b2a4d6 SM |
47 | |
48 | /* IMPORTANT: the RTC only stores whole seconds. It is arbitrary | |
49 | * whether it stores the most close value or the value with partial | |
50 | * seconds truncated. However, it is important that we use it to store | |
51 | * the truncated value. This is because otherwise it is necessary, | |
52 | * in an rtc sync function, to read both xtime.tv_sec and | |
53 | * xtime.tv_nsec. On some processors (i.e. ARM), an atomic read | |
54 | * of >32bits is not possible. So storing the most close value would | |
55 | * slow down the sync API. So here we have the truncated value and | |
56 | * the best guess is to add 0.5s. | |
57 | */ | |
58 | ||
5614a4a3 | 59 | static void rtc_hctosys(struct rtc_device *rtc) |
f9b2a4d6 | 60 | { |
3edf29d9 | 61 | int err; |
f9b2a4d6 SM |
62 | struct rtc_time tm; |
63 | struct timespec64 tv64 = { | |
64 | .tv_nsec = NSEC_PER_SEC >> 1, | |
65 | }; | |
f9b2a4d6 SM |
66 | |
67 | err = rtc_read_time(rtc, &tm); | |
68 | if (err) { | |
69 | dev_err(rtc->dev.parent, | |
70 | "hctosys: unable to read the hardware clock\n"); | |
71 | goto err_read; | |
72 | } | |
73 | ||
74 | tv64.tv_sec = rtc_tm_to_time64(&tm); | |
75 | ||
76 | #if BITS_PER_LONG == 32 | |
77 | if (tv64.tv_sec > INT_MAX) { | |
78 | err = -ERANGE; | |
79 | goto err_read; | |
80 | } | |
81 | #endif | |
82 | ||
83 | err = do_settimeofday64(&tv64); | |
84 | ||
85 | dev_info(rtc->dev.parent, "setting system clock to %ptR UTC (%lld)\n", | |
86 | &tm, (long long)tv64.tv_sec); | |
87 | ||
88 | err_read: | |
f9b2a4d6 | 89 | rtc_hctosys_ret = err; |
f9b2a4d6 | 90 | } |
4c24e29e | 91 | #endif |
7ca1d488 | 92 | |
92e7f04a | 93 | #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_RTC_HCTOSYS_DEVICE) |
7ca1d488 DB |
94 | /* |
95 | * On suspend(), measure the delta between one RTC and the | |
96 | * system's wall clock; restore it on resume(). | |
97 | */ | |
98 | ||
d4bda8f8 | 99 | static struct timespec64 old_rtc, old_system, old_delta; |
3dcad5ff | 100 | |
92e7f04a | 101 | static int rtc_suspend(struct device *dev) |
7ca1d488 DB |
102 | { |
103 | struct rtc_device *rtc = to_rtc_device(dev); | |
104 | struct rtc_time tm; | |
d4bda8f8 | 105 | struct timespec64 delta, delta_delta; |
e1d60093 | 106 | int err; |
9ecf37eb | 107 | |
0fa88cb4 | 108 | if (timekeeping_rtc_skipsuspend()) |
9ecf37eb FT |
109 | return 0; |
110 | ||
d4afc76c | 111 | if (strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE) != 0) |
7ca1d488 DB |
112 | return 0; |
113 | ||
3dcad5ff | 114 | /* snapshot the current RTC and system time at suspend*/ |
e1d60093 HG |
115 | err = rtc_read_time(rtc, &tm); |
116 | if (err < 0) { | |
117 | pr_debug("%s: fail to read rtc time\n", dev_name(&rtc->dev)); | |
118 | return 0; | |
119 | } | |
120 | ||
5089ea15 | 121 | ktime_get_real_ts64(&old_system); |
d4bda8f8 | 122 | old_rtc.tv_sec = rtc_tm_to_time64(&tm); |
3dcad5ff | 123 | |
3dcad5ff JS |
124 | /* |
125 | * To avoid drift caused by repeated suspend/resumes, | |
126 | * which each can add ~1 second drift error, | |
127 | * try to compensate so the difference in system time | |
128 | * and rtc time stays close to constant. | |
129 | */ | |
d4bda8f8 JS |
130 | delta = timespec64_sub(old_system, old_rtc); |
131 | delta_delta = timespec64_sub(delta, old_delta); | |
6a8943d9 | 132 | if (delta_delta.tv_sec < -2 || delta_delta.tv_sec >= 2) { |
3dcad5ff JS |
133 | /* |
134 | * if delta_delta is too large, assume time correction | |
606cc43c | 135 | * has occurred and set old_delta to the current delta. |
3dcad5ff JS |
136 | */ |
137 | old_delta = delta; | |
138 | } else { | |
139 | /* Otherwise try to adjust old_system to compensate */ | |
d4bda8f8 | 140 | old_system = timespec64_sub(old_system, delta_delta); |
3dcad5ff | 141 | } |
7ca1d488 | 142 | |
7ca1d488 DB |
143 | return 0; |
144 | } | |
145 | ||
146 | static int rtc_resume(struct device *dev) | |
147 | { | |
148 | struct rtc_device *rtc = to_rtc_device(dev); | |
149 | struct rtc_time tm; | |
d4bda8f8 JS |
150 | struct timespec64 new_system, new_rtc; |
151 | struct timespec64 sleep_time; | |
e1d60093 | 152 | int err; |
7ca1d488 | 153 | |
0fa88cb4 | 154 | if (timekeeping_rtc_skipresume()) |
9ecf37eb FT |
155 | return 0; |
156 | ||
4c24e29e | 157 | rtc_hctosys_ret = -ENODEV; |
d4afc76c | 158 | if (strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE) != 0) |
7ca1d488 DB |
159 | return 0; |
160 | ||
3dcad5ff | 161 | /* snapshot the current rtc and system time at resume */ |
5089ea15 | 162 | ktime_get_real_ts64(&new_system); |
e1d60093 HG |
163 | err = rtc_read_time(rtc, &tm); |
164 | if (err < 0) { | |
165 | pr_debug("%s: fail to read rtc time\n", dev_name(&rtc->dev)); | |
166 | return 0; | |
167 | } | |
168 | ||
d4bda8f8 | 169 | new_rtc.tv_sec = rtc_tm_to_time64(&tm); |
3dcad5ff JS |
170 | new_rtc.tv_nsec = 0; |
171 | ||
6a8943d9 AH |
172 | if (new_rtc.tv_sec < old_rtc.tv_sec) { |
173 | pr_debug("%s: time travel!\n", dev_name(&rtc->dev)); | |
7ca1d488 DB |
174 | return 0; |
175 | } | |
176 | ||
3dcad5ff | 177 | /* calculate the RTC time delta (sleep time)*/ |
d4bda8f8 | 178 | sleep_time = timespec64_sub(new_rtc, old_rtc); |
3dcad5ff JS |
179 | |
180 | /* | |
181 | * Since these RTC suspend/resume handlers are not called | |
182 | * at the very end of suspend or the start of resume, | |
183 | * some run-time may pass on either sides of the sleep time | |
184 | * so subtract kernel run-time between rtc_suspend to rtc_resume | |
185 | * to keep things accurate. | |
186 | */ | |
d4bda8f8 | 187 | sleep_time = timespec64_sub(sleep_time, |
606cc43c | 188 | timespec64_sub(new_system, old_system)); |
7ca1d488 | 189 | |
6a8943d9 | 190 | if (sleep_time.tv_sec >= 0) |
d4bda8f8 | 191 | timekeeping_inject_sleeptime64(&sleep_time); |
4c24e29e | 192 | rtc_hctosys_ret = 0; |
7ca1d488 DB |
193 | return 0; |
194 | } | |
195 | ||
92e7f04a SK |
196 | static SIMPLE_DEV_PM_OPS(rtc_class_dev_pm_ops, rtc_suspend, rtc_resume); |
197 | #define RTC_CLASS_DEV_PM_OPS (&rtc_class_dev_pm_ops) | |
7ca1d488 | 198 | #else |
92e7f04a | 199 | #define RTC_CLASS_DEV_PM_OPS NULL |
7ca1d488 DB |
200 | #endif |
201 | ||
3068a254 | 202 | /* Ensure the caller will set the id before releasing the device */ |
d1bec20f AB |
203 | static struct rtc_device *rtc_allocate_device(void) |
204 | { | |
205 | struct rtc_device *rtc; | |
206 | ||
207 | rtc = kzalloc(sizeof(*rtc), GFP_KERNEL); | |
208 | if (!rtc) | |
209 | return NULL; | |
210 | ||
211 | device_initialize(&rtc->dev); | |
212 | ||
69eca258 TG |
213 | /* |
214 | * Drivers can revise this default after allocating the device. | |
215 | * The default is what most RTCs do: Increment seconds exactly one | |
216 | * second after the write happened. This adds a default transport | |
217 | * time of 5ms which is at least halfways close to reality. | |
218 | */ | |
219 | rtc->set_offset_nsec = NSEC_PER_SEC + 5 * NSEC_PER_MSEC; | |
0f295b06 | 220 | |
d1bec20f AB |
221 | rtc->irq_freq = 1; |
222 | rtc->max_user_freq = 64; | |
223 | rtc->dev.class = rtc_class; | |
224 | rtc->dev.groups = rtc_get_dev_attribute_groups(); | |
225 | rtc->dev.release = rtc_device_release; | |
226 | ||
227 | mutex_init(&rtc->ops_lock); | |
228 | spin_lock_init(&rtc->irq_lock); | |
d1bec20f AB |
229 | init_waitqueue_head(&rtc->irq_queue); |
230 | ||
231 | /* Init timerqueue */ | |
232 | timerqueue_init_head(&rtc->timerqueue); | |
233 | INIT_WORK(&rtc->irqwork, rtc_timer_do_work); | |
234 | /* Init aie timer */ | |
9a032011 | 235 | rtc_timer_init(&rtc->aie_timer, rtc_aie_update_irq, rtc); |
d1bec20f | 236 | /* Init uie timer */ |
9a032011 | 237 | rtc_timer_init(&rtc->uie_rtctimer, rtc_uie_update_irq, rtc); |
d1bec20f AB |
238 | /* Init pie timer */ |
239 | hrtimer_init(&rtc->pie_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); | |
240 | rtc->pie_timer.function = rtc_pie_update_irq; | |
241 | rtc->pie_enabled = 0; | |
242 | ||
7ae41220 | 243 | set_bit(RTC_FEATURE_ALARM, rtc->features); |
adb17a05 | 244 | set_bit(RTC_FEATURE_UPDATE_INTERRUPT, rtc->features); |
7ae41220 | 245 | |
d1bec20f AB |
246 | return rtc; |
247 | } | |
7ca1d488 | 248 | |
b91336df AB |
249 | static int rtc_device_get_id(struct device *dev) |
250 | { | |
251 | int of_id = -1, id = -1; | |
252 | ||
253 | if (dev->of_node) | |
254 | of_id = of_alias_get_id(dev->of_node, "rtc"); | |
255 | else if (dev->parent && dev->parent->of_node) | |
256 | of_id = of_alias_get_id(dev->parent->of_node, "rtc"); | |
257 | ||
258 | if (of_id >= 0) { | |
259 | id = ida_simple_get(&rtc_ida, of_id, of_id + 1, GFP_KERNEL); | |
260 | if (id < 0) | |
261 | dev_warn(dev, "/aliases ID %d not available\n", of_id); | |
262 | } | |
263 | ||
264 | if (id < 0) | |
592ff0c8 | 265 | id = ida_alloc(&rtc_ida, GFP_KERNEL); |
b91336df AB |
266 | |
267 | return id; | |
268 | } | |
269 | ||
98951564 BW |
270 | static void rtc_device_get_offset(struct rtc_device *rtc) |
271 | { | |
272 | time64_t range_secs; | |
273 | u32 start_year; | |
274 | int ret; | |
275 | ||
276 | /* | |
277 | * If RTC driver did not implement the range of RTC hardware device, | |
278 | * then we can not expand the RTC range by adding or subtracting one | |
279 | * offset. | |
280 | */ | |
281 | if (rtc->range_min == rtc->range_max) | |
282 | return; | |
283 | ||
284 | ret = device_property_read_u32(rtc->dev.parent, "start-year", | |
285 | &start_year); | |
286 | if (!ret) { | |
287 | rtc->start_secs = mktime64(start_year, 1, 1, 0, 0, 0); | |
288 | rtc->set_start_time = true; | |
289 | } | |
290 | ||
291 | /* | |
292 | * If user did not implement the start time for RTC driver, then no | |
293 | * need to expand the RTC range. | |
294 | */ | |
295 | if (!rtc->set_start_time) | |
296 | return; | |
297 | ||
298 | range_secs = rtc->range_max - rtc->range_min + 1; | |
299 | ||
300 | /* | |
301 | * If the start_secs is larger than the maximum seconds (rtc->range_max) | |
302 | * supported by RTC hardware or the maximum seconds of new expanded | |
303 | * range (start_secs + rtc->range_max - rtc->range_min) is less than | |
304 | * rtc->range_min, which means the minimum seconds (rtc->range_min) of | |
305 | * RTC hardware will be mapped to start_secs by adding one offset, so | |
306 | * the offset seconds calculation formula should be: | |
307 | * rtc->offset_secs = rtc->start_secs - rtc->range_min; | |
308 | * | |
309 | * If the start_secs is larger than the minimum seconds (rtc->range_min) | |
310 | * supported by RTC hardware, then there is one region is overlapped | |
311 | * between the original RTC hardware range and the new expanded range, | |
312 | * and this overlapped region do not need to be mapped into the new | |
313 | * expanded range due to it is valid for RTC device. So the minimum | |
314 | * seconds of RTC hardware (rtc->range_min) should be mapped to | |
315 | * rtc->range_max + 1, then the offset seconds formula should be: | |
316 | * rtc->offset_secs = rtc->range_max - rtc->range_min + 1; | |
317 | * | |
318 | * If the start_secs is less than the minimum seconds (rtc->range_min), | |
319 | * which is similar to case 2. So the start_secs should be mapped to | |
320 | * start_secs + rtc->range_max - rtc->range_min + 1, then the | |
321 | * offset seconds formula should be: | |
322 | * rtc->offset_secs = -(rtc->range_max - rtc->range_min + 1); | |
323 | * | |
324 | * Otherwise the offset seconds should be 0. | |
325 | */ | |
326 | if (rtc->start_secs > rtc->range_max || | |
327 | rtc->start_secs + range_secs - 1 < rtc->range_min) | |
328 | rtc->offset_secs = rtc->start_secs - rtc->range_min; | |
329 | else if (rtc->start_secs > rtc->range_min) | |
330 | rtc->offset_secs = range_secs; | |
331 | else if (rtc->start_secs < rtc->range_min) | |
332 | rtc->offset_secs = -range_secs; | |
333 | else | |
334 | rtc->offset_secs = 0; | |
335 | } | |
336 | ||
fdcfd854 | 337 | static void devm_rtc_unregister_device(void *data) |
0c86edc0 | 338 | { |
fdcfd854 BG |
339 | struct rtc_device *rtc = data; |
340 | ||
c3b399a4 DT |
341 | mutex_lock(&rtc->ops_lock); |
342 | /* | |
343 | * Remove innards of this RTC, then disable it, before | |
344 | * letting any rtc_class_open() users access it again | |
345 | */ | |
c3b399a4 | 346 | rtc_proc_del_device(rtc); |
789c1093 YY |
347 | if (!test_bit(RTC_NO_CDEV, &rtc->flags)) |
348 | cdev_device_del(&rtc->char_dev, &rtc->dev); | |
c3b399a4 DT |
349 | rtc->ops = NULL; |
350 | mutex_unlock(&rtc->ops_lock); | |
0c86edc0 | 351 | } |
0c86edc0 | 352 | |
1bfc485b | 353 | static void devm_rtc_release_device(void *res) |
3068a254 | 354 | { |
1bfc485b | 355 | struct rtc_device *rtc = res; |
3068a254 | 356 | |
fdcfd854 | 357 | put_device(&rtc->dev); |
3068a254 AB |
358 | } |
359 | ||
360 | struct rtc_device *devm_rtc_allocate_device(struct device *dev) | |
361 | { | |
1bfc485b | 362 | struct rtc_device *rtc; |
3068a254 AB |
363 | int id, err; |
364 | ||
365 | id = rtc_device_get_id(dev); | |
366 | if (id < 0) | |
367 | return ERR_PTR(id); | |
368 | ||
3068a254 AB |
369 | rtc = rtc_allocate_device(); |
370 | if (!rtc) { | |
592ff0c8 | 371 | ida_free(&rtc_ida, id); |
1bfc485b | 372 | return ERR_PTR(-ENOMEM); |
3068a254 AB |
373 | } |
374 | ||
3068a254 AB |
375 | rtc->id = id; |
376 | rtc->dev.parent = dev; | |
60da7380 | 377 | err = devm_add_action_or_reset(dev, devm_rtc_release_device, rtc); |
24d23181 YY |
378 | if (err) |
379 | return ERR_PTR(err); | |
3068a254 | 380 | |
60da7380 | 381 | err = dev_set_name(&rtc->dev, "rtc%d", id); |
1bfc485b BG |
382 | if (err) |
383 | return ERR_PTR(err); | |
3068a254 | 384 | |
1bfc485b | 385 | return rtc; |
3068a254 AB |
386 | } |
387 | EXPORT_SYMBOL_GPL(devm_rtc_allocate_device); | |
388 | ||
fdcfd854 | 389 | int __devm_rtc_register_device(struct module *owner, struct rtc_device *rtc) |
3068a254 AB |
390 | { |
391 | struct rtc_wkalrm alrm; | |
392 | int err; | |
393 | ||
924068e5 AB |
394 | if (!rtc->ops) { |
395 | dev_dbg(&rtc->dev, "no ops set\n"); | |
3068a254 | 396 | return -EINVAL; |
924068e5 | 397 | } |
3068a254 | 398 | |
7ae41220 AB |
399 | if (!rtc->ops->set_alarm) |
400 | clear_bit(RTC_FEATURE_ALARM, rtc->features); | |
401 | ||
22685519 AB |
402 | if (rtc->ops->set_offset) |
403 | set_bit(RTC_FEATURE_CORRECTION, rtc->features); | |
404 | ||
3068a254 | 405 | rtc->owner = owner; |
98951564 | 406 | rtc_device_get_offset(rtc); |
3068a254 AB |
407 | |
408 | /* Check to see if there is an ALARM already set in hw */ | |
409 | err = __rtc_read_alarm(rtc, &alrm); | |
410 | if (!err && !rtc_valid_tm(&alrm.time)) | |
411 | rtc_initialize_alarm(rtc, &alrm); | |
412 | ||
413 | rtc_dev_prepare(rtc); | |
414 | ||
415 | err = cdev_device_add(&rtc->char_dev, &rtc->dev); | |
789c1093 YY |
416 | if (err) { |
417 | set_bit(RTC_NO_CDEV, &rtc->flags); | |
3068a254 AB |
418 | dev_warn(rtc->dev.parent, "failed to add char device %d:%d\n", |
419 | MAJOR(rtc->dev.devt), rtc->id); | |
789c1093 | 420 | } else { |
3068a254 AB |
421 | dev_dbg(rtc->dev.parent, "char device (%d:%d)\n", |
422 | MAJOR(rtc->dev.devt), rtc->id); | |
789c1093 | 423 | } |
3068a254 AB |
424 | |
425 | rtc_proc_add_device(rtc); | |
426 | ||
3068a254 AB |
427 | dev_info(rtc->dev.parent, "registered as %s\n", |
428 | dev_name(&rtc->dev)); | |
429 | ||
f9b2a4d6 SM |
430 | #ifdef CONFIG_RTC_HCTOSYS_DEVICE |
431 | if (!strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE)) | |
5614a4a3 | 432 | rtc_hctosys(rtc); |
f9b2a4d6 SM |
433 | #endif |
434 | ||
fdcfd854 BG |
435 | return devm_add_action_or_reset(rtc->dev.parent, |
436 | devm_rtc_unregister_device, rtc); | |
3068a254 | 437 | } |
fdcfd854 | 438 | EXPORT_SYMBOL_GPL(__devm_rtc_register_device); |
3068a254 | 439 | |
a2694414 AB |
440 | /** |
441 | * devm_rtc_device_register - resource managed rtc_device_register() | |
442 | * @dev: the device to register | |
443 | * @name: the name of the device (unused) | |
444 | * @ops: the rtc operations structure | |
445 | * @owner: the module owner | |
446 | * | |
447 | * @return a struct rtc on success, or an ERR_PTR on error | |
448 | * | |
449 | * Managed rtc_device_register(). The rtc_device returned from this function | |
450 | * are automatically freed on driver detach. | |
451 | * This function is deprecated, use devm_rtc_allocate_device and | |
452 | * rtc_register_device instead | |
453 | */ | |
454 | struct rtc_device *devm_rtc_device_register(struct device *dev, | |
606cc43c AB |
455 | const char *name, |
456 | const struct rtc_class_ops *ops, | |
457 | struct module *owner) | |
a2694414 AB |
458 | { |
459 | struct rtc_device *rtc; | |
460 | int err; | |
461 | ||
462 | rtc = devm_rtc_allocate_device(dev); | |
463 | if (IS_ERR(rtc)) | |
464 | return rtc; | |
465 | ||
466 | rtc->ops = ops; | |
467 | ||
fdcfd854 | 468 | err = __devm_rtc_register_device(owner, rtc); |
a2694414 AB |
469 | if (err) |
470 | return ERR_PTR(err); | |
471 | ||
472 | return rtc; | |
473 | } | |
474 | EXPORT_SYMBOL_GPL(devm_rtc_device_register); | |
475 | ||
0c86edc0 AZ |
476 | static int __init rtc_init(void) |
477 | { | |
478 | rtc_class = class_create(THIS_MODULE, "rtc"); | |
479 | if (IS_ERR(rtc_class)) { | |
c100a5e0 | 480 | pr_err("couldn't create class\n"); |
0c86edc0 AZ |
481 | return PTR_ERR(rtc_class); |
482 | } | |
92e7f04a | 483 | rtc_class->pm = RTC_CLASS_DEV_PM_OPS; |
5726fb20 | 484 | rtc_dev_init(); |
0c86edc0 AZ |
485 | return 0; |
486 | } | |
818a8674 | 487 | subsys_initcall(rtc_init); |