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1e3929ef AB |
1 | /* |
2 | * RTC driver for the Micro Crystal RV8803 | |
3 | * | |
4 | * Copyright (C) 2015 Micro Crystal SA | |
5 | * | |
6 | * Alexandre Belloni <alexandre.belloni@free-electrons.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/bcd.h> | |
15 | #include <linux/bitops.h> | |
16 | #include <linux/i2c.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/rtc.h> | |
21 | ||
22 | #define RV8803_SEC 0x00 | |
23 | #define RV8803_MIN 0x01 | |
24 | #define RV8803_HOUR 0x02 | |
25 | #define RV8803_WEEK 0x03 | |
26 | #define RV8803_DAY 0x04 | |
27 | #define RV8803_MONTH 0x05 | |
28 | #define RV8803_YEAR 0x06 | |
29 | #define RV8803_RAM 0x07 | |
30 | #define RV8803_ALARM_MIN 0x08 | |
31 | #define RV8803_ALARM_HOUR 0x09 | |
32 | #define RV8803_ALARM_WEEK_OR_DAY 0x0A | |
33 | #define RV8803_EXT 0x0D | |
34 | #define RV8803_FLAG 0x0E | |
35 | #define RV8803_CTRL 0x0F | |
36 | ||
37 | #define RV8803_EXT_WADA BIT(6) | |
38 | ||
39 | #define RV8803_FLAG_V1F BIT(0) | |
40 | #define RV8803_FLAG_V2F BIT(1) | |
41 | #define RV8803_FLAG_AF BIT(3) | |
42 | #define RV8803_FLAG_TF BIT(4) | |
43 | #define RV8803_FLAG_UF BIT(5) | |
44 | ||
45 | #define RV8803_CTRL_RESET BIT(0) | |
46 | ||
47 | #define RV8803_CTRL_EIE BIT(2) | |
48 | #define RV8803_CTRL_AIE BIT(3) | |
49 | #define RV8803_CTRL_TIE BIT(4) | |
50 | #define RV8803_CTRL_UIE BIT(5) | |
51 | ||
52 | struct rv8803_data { | |
53 | struct i2c_client *client; | |
54 | struct rtc_device *rtc; | |
9d1fa4c3 | 55 | struct mutex flags_lock; |
1e3929ef AB |
56 | u8 ctrl; |
57 | }; | |
58 | ||
59 | static irqreturn_t rv8803_handle_irq(int irq, void *dev_id) | |
60 | { | |
61 | struct i2c_client *client = dev_id; | |
62 | struct rv8803_data *rv8803 = i2c_get_clientdata(client); | |
63 | unsigned long events = 0; | |
68c85f29 | 64 | int flags; |
1e3929ef | 65 | |
9d1fa4c3 | 66 | mutex_lock(&rv8803->flags_lock); |
1e3929ef AB |
67 | |
68 | flags = i2c_smbus_read_byte_data(client, RV8803_FLAG); | |
69 | if (flags <= 0) { | |
9d1fa4c3 | 70 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
71 | return IRQ_NONE; |
72 | } | |
73 | ||
74 | if (flags & RV8803_FLAG_V1F) | |
75 | dev_warn(&client->dev, "Voltage low, temperature compensation stopped.\n"); | |
76 | ||
77 | if (flags & RV8803_FLAG_V2F) | |
78 | dev_warn(&client->dev, "Voltage low, data loss detected.\n"); | |
79 | ||
80 | if (flags & RV8803_FLAG_TF) { | |
81 | flags &= ~RV8803_FLAG_TF; | |
82 | rv8803->ctrl &= ~RV8803_CTRL_TIE; | |
83 | events |= RTC_PF; | |
84 | } | |
85 | ||
86 | if (flags & RV8803_FLAG_AF) { | |
87 | flags &= ~RV8803_FLAG_AF; | |
88 | rv8803->ctrl &= ~RV8803_CTRL_AIE; | |
89 | events |= RTC_AF; | |
90 | } | |
91 | ||
92 | if (flags & RV8803_FLAG_UF) { | |
93 | flags &= ~RV8803_FLAG_UF; | |
94 | rv8803->ctrl &= ~RV8803_CTRL_UIE; | |
95 | events |= RTC_UF; | |
96 | } | |
97 | ||
98 | if (events) { | |
99 | rtc_update_irq(rv8803->rtc, 1, events); | |
100 | i2c_smbus_write_byte_data(client, RV8803_FLAG, flags); | |
101 | i2c_smbus_write_byte_data(rv8803->client, RV8803_CTRL, | |
102 | rv8803->ctrl); | |
103 | } | |
104 | ||
9d1fa4c3 | 105 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
106 | |
107 | return IRQ_HANDLED; | |
108 | } | |
109 | ||
110 | static int rv8803_get_time(struct device *dev, struct rtc_time *tm) | |
111 | { | |
112 | struct rv8803_data *rv8803 = dev_get_drvdata(dev); | |
113 | u8 date1[7]; | |
114 | u8 date2[7]; | |
115 | u8 *date = date1; | |
116 | int ret, flags; | |
117 | ||
118 | flags = i2c_smbus_read_byte_data(rv8803->client, RV8803_FLAG); | |
119 | if (flags < 0) | |
120 | return flags; | |
121 | ||
122 | if (flags & RV8803_FLAG_V2F) { | |
123 | dev_warn(dev, "Voltage low, data is invalid.\n"); | |
124 | return -EINVAL; | |
125 | } | |
126 | ||
127 | ret = i2c_smbus_read_i2c_block_data(rv8803->client, RV8803_SEC, | |
128 | 7, date); | |
129 | if (ret != 7) | |
130 | return ret < 0 ? ret : -EIO; | |
131 | ||
132 | if ((date1[RV8803_SEC] & 0x7f) == bin2bcd(59)) { | |
133 | ret = i2c_smbus_read_i2c_block_data(rv8803->client, RV8803_SEC, | |
134 | 7, date2); | |
135 | if (ret != 7) | |
136 | return ret < 0 ? ret : -EIO; | |
137 | ||
138 | if ((date2[RV8803_SEC] & 0x7f) != bin2bcd(59)) | |
139 | date = date2; | |
140 | } | |
141 | ||
142 | tm->tm_sec = bcd2bin(date[RV8803_SEC] & 0x7f); | |
143 | tm->tm_min = bcd2bin(date[RV8803_MIN] & 0x7f); | |
144 | tm->tm_hour = bcd2bin(date[RV8803_HOUR] & 0x3f); | |
145 | tm->tm_wday = ffs(date[RV8803_WEEK] & 0x7f); | |
146 | tm->tm_mday = bcd2bin(date[RV8803_DAY] & 0x3f); | |
147 | tm->tm_mon = bcd2bin(date[RV8803_MONTH] & 0x1f) - 1; | |
148 | tm->tm_year = bcd2bin(date[RV8803_YEAR]) + 100; | |
149 | ||
150 | return rtc_valid_tm(tm); | |
151 | } | |
152 | ||
153 | static int rv8803_set_time(struct device *dev, struct rtc_time *tm) | |
154 | { | |
155 | struct rv8803_data *rv8803 = dev_get_drvdata(dev); | |
156 | u8 date[7]; | |
157 | int flags, ret; | |
1e3929ef AB |
158 | |
159 | if ((tm->tm_year < 100) || (tm->tm_year > 199)) | |
160 | return -EINVAL; | |
161 | ||
162 | date[RV8803_SEC] = bin2bcd(tm->tm_sec); | |
163 | date[RV8803_MIN] = bin2bcd(tm->tm_min); | |
164 | date[RV8803_HOUR] = bin2bcd(tm->tm_hour); | |
165 | date[RV8803_WEEK] = 1 << (tm->tm_wday); | |
166 | date[RV8803_DAY] = bin2bcd(tm->tm_mday); | |
167 | date[RV8803_MONTH] = bin2bcd(tm->tm_mon + 1); | |
168 | date[RV8803_YEAR] = bin2bcd(tm->tm_year - 100); | |
169 | ||
170 | ret = i2c_smbus_write_i2c_block_data(rv8803->client, RV8803_SEC, | |
171 | 7, date); | |
172 | if (ret < 0) | |
173 | return ret; | |
174 | ||
9d1fa4c3 | 175 | mutex_lock(&rv8803->flags_lock); |
1e3929ef AB |
176 | |
177 | flags = i2c_smbus_read_byte_data(rv8803->client, RV8803_FLAG); | |
178 | if (flags < 0) { | |
9d1fa4c3 | 179 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
180 | return flags; |
181 | } | |
182 | ||
183 | ret = i2c_smbus_write_byte_data(rv8803->client, RV8803_FLAG, | |
184 | flags & ~RV8803_FLAG_V2F); | |
185 | ||
9d1fa4c3 | 186 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
187 | |
188 | return ret; | |
189 | } | |
190 | ||
191 | static int rv8803_get_alarm(struct device *dev, struct rtc_wkalrm *alrm) | |
192 | { | |
193 | struct rv8803_data *rv8803 = dev_get_drvdata(dev); | |
194 | struct i2c_client *client = rv8803->client; | |
195 | u8 alarmvals[3]; | |
196 | int flags, ret; | |
197 | ||
198 | ret = i2c_smbus_read_i2c_block_data(client, RV8803_ALARM_MIN, | |
199 | 3, alarmvals); | |
200 | if (ret != 3) | |
201 | return ret < 0 ? ret : -EIO; | |
202 | ||
203 | flags = i2c_smbus_read_byte_data(client, RV8803_FLAG); | |
204 | if (flags < 0) | |
205 | return flags; | |
206 | ||
207 | alrm->time.tm_sec = 0; | |
208 | alrm->time.tm_min = bcd2bin(alarmvals[0] & 0x7f); | |
209 | alrm->time.tm_hour = bcd2bin(alarmvals[1] & 0x3f); | |
210 | alrm->time.tm_wday = -1; | |
211 | alrm->time.tm_mday = bcd2bin(alarmvals[2] & 0x3f); | |
212 | alrm->time.tm_mon = -1; | |
213 | alrm->time.tm_year = -1; | |
214 | ||
215 | alrm->enabled = !!(rv8803->ctrl & RV8803_CTRL_AIE); | |
216 | alrm->pending = (flags & RV8803_FLAG_AF) && alrm->enabled; | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | static int rv8803_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) | |
222 | { | |
223 | struct i2c_client *client = to_i2c_client(dev); | |
224 | struct rv8803_data *rv8803 = dev_get_drvdata(dev); | |
225 | u8 alarmvals[3]; | |
226 | u8 ctrl[2]; | |
227 | int ret, err; | |
1e3929ef AB |
228 | |
229 | /* The alarm has no seconds, round up to nearest minute */ | |
230 | if (alrm->time.tm_sec) { | |
231 | time64_t alarm_time = rtc_tm_to_time64(&alrm->time); | |
232 | ||
233 | alarm_time += 60 - alrm->time.tm_sec; | |
234 | rtc_time64_to_tm(alarm_time, &alrm->time); | |
235 | } | |
236 | ||
9d1fa4c3 | 237 | mutex_lock(&rv8803->flags_lock); |
1e3929ef AB |
238 | |
239 | ret = i2c_smbus_read_i2c_block_data(client, RV8803_FLAG, 2, ctrl); | |
240 | if (ret != 2) { | |
9d1fa4c3 | 241 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
242 | return ret < 0 ? ret : -EIO; |
243 | } | |
244 | ||
245 | alarmvals[0] = bin2bcd(alrm->time.tm_min); | |
246 | alarmvals[1] = bin2bcd(alrm->time.tm_hour); | |
247 | alarmvals[2] = bin2bcd(alrm->time.tm_mday); | |
248 | ||
249 | if (rv8803->ctrl & (RV8803_CTRL_AIE | RV8803_CTRL_UIE)) { | |
250 | rv8803->ctrl &= ~(RV8803_CTRL_AIE | RV8803_CTRL_UIE); | |
251 | err = i2c_smbus_write_byte_data(rv8803->client, RV8803_CTRL, | |
252 | rv8803->ctrl); | |
253 | if (err) { | |
9d1fa4c3 | 254 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
255 | return err; |
256 | } | |
257 | } | |
258 | ||
259 | ctrl[1] &= ~RV8803_FLAG_AF; | |
260 | err = i2c_smbus_write_byte_data(rv8803->client, RV8803_FLAG, ctrl[1]); | |
9d1fa4c3 | 261 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
262 | if (err) |
263 | return err; | |
264 | ||
265 | err = i2c_smbus_write_i2c_block_data(rv8803->client, RV8803_ALARM_MIN, | |
266 | 3, alarmvals); | |
267 | if (err) | |
268 | return err; | |
269 | ||
270 | if (alrm->enabled) { | |
271 | if (rv8803->rtc->uie_rtctimer.enabled) | |
272 | rv8803->ctrl |= RV8803_CTRL_UIE; | |
273 | if (rv8803->rtc->aie_timer.enabled) | |
274 | rv8803->ctrl |= RV8803_CTRL_AIE; | |
275 | ||
276 | err = i2c_smbus_write_byte_data(rv8803->client, RV8803_CTRL, | |
277 | rv8803->ctrl); | |
278 | if (err) | |
279 | return err; | |
280 | } | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | static int rv8803_alarm_irq_enable(struct device *dev, unsigned int enabled) | |
286 | { | |
287 | struct i2c_client *client = to_i2c_client(dev); | |
288 | struct rv8803_data *rv8803 = dev_get_drvdata(dev); | |
289 | int ctrl, flags, err; | |
1e3929ef AB |
290 | |
291 | ctrl = rv8803->ctrl; | |
292 | ||
293 | if (enabled) { | |
294 | if (rv8803->rtc->uie_rtctimer.enabled) | |
295 | ctrl |= RV8803_CTRL_UIE; | |
296 | if (rv8803->rtc->aie_timer.enabled) | |
297 | ctrl |= RV8803_CTRL_AIE; | |
298 | } else { | |
299 | if (!rv8803->rtc->uie_rtctimer.enabled) | |
300 | ctrl &= ~RV8803_CTRL_UIE; | |
301 | if (!rv8803->rtc->aie_timer.enabled) | |
302 | ctrl &= ~RV8803_CTRL_AIE; | |
303 | } | |
304 | ||
9d1fa4c3 | 305 | mutex_lock(&rv8803->flags_lock); |
1e3929ef AB |
306 | flags = i2c_smbus_read_byte_data(client, RV8803_FLAG); |
307 | if (flags < 0) { | |
9d1fa4c3 | 308 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
309 | return flags; |
310 | } | |
311 | flags &= ~(RV8803_FLAG_AF | RV8803_FLAG_UF); | |
312 | err = i2c_smbus_write_byte_data(client, RV8803_FLAG, flags); | |
9d1fa4c3 | 313 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
314 | if (err) |
315 | return err; | |
316 | ||
317 | if (ctrl != rv8803->ctrl) { | |
318 | rv8803->ctrl = ctrl; | |
319 | err = i2c_smbus_write_byte_data(client, RV8803_CTRL, | |
320 | rv8803->ctrl); | |
321 | if (err) | |
322 | return err; | |
323 | } | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
328 | static int rv8803_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) | |
329 | { | |
330 | struct i2c_client *client = to_i2c_client(dev); | |
331 | struct rv8803_data *rv8803 = dev_get_drvdata(dev); | |
332 | int flags, ret = 0; | |
1e3929ef AB |
333 | |
334 | switch (cmd) { | |
335 | case RTC_VL_READ: | |
336 | flags = i2c_smbus_read_byte_data(client, RV8803_FLAG); | |
337 | if (flags < 0) | |
338 | return flags; | |
339 | ||
340 | if (flags & RV8803_FLAG_V1F) | |
341 | dev_warn(&client->dev, "Voltage low, temperature compensation stopped.\n"); | |
342 | ||
343 | if (flags & RV8803_FLAG_V2F) | |
344 | dev_warn(&client->dev, "Voltage low, data loss detected.\n"); | |
345 | ||
346 | flags &= RV8803_FLAG_V1F | RV8803_FLAG_V2F; | |
347 | ||
348 | if (copy_to_user((void __user *)arg, &flags, sizeof(int))) | |
349 | return -EFAULT; | |
350 | ||
351 | return 0; | |
352 | ||
353 | case RTC_VL_CLR: | |
9d1fa4c3 | 354 | mutex_lock(&rv8803->flags_lock); |
1e3929ef AB |
355 | flags = i2c_smbus_read_byte_data(client, RV8803_FLAG); |
356 | if (flags < 0) { | |
9d1fa4c3 | 357 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
358 | return flags; |
359 | } | |
360 | ||
361 | flags &= ~(RV8803_FLAG_V1F | RV8803_FLAG_V2F); | |
362 | ret = i2c_smbus_write_byte_data(client, RV8803_FLAG, flags); | |
9d1fa4c3 | 363 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
364 | if (ret < 0) |
365 | return ret; | |
366 | ||
367 | return 0; | |
368 | ||
369 | default: | |
370 | return -ENOIOCTLCMD; | |
371 | } | |
372 | } | |
373 | ||
374 | static ssize_t rv8803_nvram_write(struct file *filp, struct kobject *kobj, | |
375 | struct bin_attribute *attr, | |
376 | char *buf, loff_t off, size_t count) | |
377 | { | |
378 | struct device *dev = kobj_to_dev(kobj); | |
379 | struct i2c_client *client = to_i2c_client(dev); | |
380 | int ret; | |
381 | ||
382 | ret = i2c_smbus_write_byte_data(client, RV8803_RAM, buf[0]); | |
383 | if (ret < 0) | |
384 | return ret; | |
385 | ||
386 | return 1; | |
387 | } | |
388 | ||
389 | static ssize_t rv8803_nvram_read(struct file *filp, struct kobject *kobj, | |
390 | struct bin_attribute *attr, | |
391 | char *buf, loff_t off, size_t count) | |
392 | { | |
393 | struct device *dev = kobj_to_dev(kobj); | |
394 | struct i2c_client *client = to_i2c_client(dev); | |
395 | int ret; | |
396 | ||
397 | ret = i2c_smbus_read_byte_data(client, RV8803_RAM); | |
398 | if (ret < 0) | |
399 | return ret; | |
400 | ||
401 | buf[0] = ret; | |
402 | ||
403 | return 1; | |
404 | } | |
405 | ||
406 | static struct bin_attribute rv8803_nvram_attr = { | |
407 | .attr = { | |
408 | .name = "nvram", | |
409 | .mode = S_IRUGO | S_IWUSR, | |
410 | }, | |
411 | .size = 1, | |
412 | .read = rv8803_nvram_read, | |
413 | .write = rv8803_nvram_write, | |
414 | }; | |
415 | ||
416 | static struct rtc_class_ops rv8803_rtc_ops = { | |
417 | .read_time = rv8803_get_time, | |
418 | .set_time = rv8803_set_time, | |
419 | .ioctl = rv8803_ioctl, | |
420 | }; | |
421 | ||
422 | static int rv8803_probe(struct i2c_client *client, | |
423 | const struct i2c_device_id *id) | |
424 | { | |
425 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); | |
426 | struct rv8803_data *rv8803; | |
427 | int err, flags; | |
428 | ||
429 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | | |
430 | I2C_FUNC_SMBUS_I2C_BLOCK)) { | |
431 | dev_err(&adapter->dev, "doesn't support I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_I2C_BLOCK\n"); | |
432 | return -EIO; | |
433 | } | |
434 | ||
435 | rv8803 = devm_kzalloc(&client->dev, sizeof(struct rv8803_data), | |
436 | GFP_KERNEL); | |
437 | if (!rv8803) | |
438 | return -ENOMEM; | |
439 | ||
9d1fa4c3 | 440 | mutex_init(&rv8803->flags_lock); |
1e3929ef AB |
441 | rv8803->client = client; |
442 | i2c_set_clientdata(client, rv8803); | |
443 | ||
444 | flags = i2c_smbus_read_byte_data(client, RV8803_FLAG); | |
445 | if (flags < 0) | |
446 | return flags; | |
447 | ||
448 | if (flags & RV8803_FLAG_V1F) | |
449 | dev_warn(&client->dev, "Voltage low, temperature compensation stopped.\n"); | |
450 | ||
451 | if (flags & RV8803_FLAG_V2F) | |
452 | dev_warn(&client->dev, "Voltage low, data loss detected.\n"); | |
453 | ||
454 | if (flags & RV8803_FLAG_AF) | |
455 | dev_warn(&client->dev, "An alarm maybe have been missed.\n"); | |
456 | ||
457 | if (client->irq > 0) { | |
458 | err = devm_request_threaded_irq(&client->dev, client->irq, | |
459 | NULL, rv8803_handle_irq, | |
460 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
461 | "rv8803", client); | |
462 | if (err) { | |
463 | dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n"); | |
464 | client->irq = 0; | |
465 | } else { | |
466 | rv8803_rtc_ops.read_alarm = rv8803_get_alarm; | |
467 | rv8803_rtc_ops.set_alarm = rv8803_set_alarm; | |
468 | rv8803_rtc_ops.alarm_irq_enable = rv8803_alarm_irq_enable; | |
469 | } | |
470 | } | |
471 | ||
472 | rv8803->rtc = devm_rtc_device_register(&client->dev, client->name, | |
473 | &rv8803_rtc_ops, THIS_MODULE); | |
474 | if (IS_ERR(rv8803->rtc)) { | |
475 | dev_err(&client->dev, "unable to register the class device\n"); | |
476 | return PTR_ERR(rv8803->rtc); | |
477 | } | |
478 | ||
479 | err = i2c_smbus_write_byte_data(rv8803->client, RV8803_EXT, | |
480 | RV8803_EXT_WADA); | |
481 | if (err) | |
482 | return err; | |
483 | ||
484 | err = device_create_bin_file(&client->dev, &rv8803_nvram_attr); | |
485 | if (err) | |
486 | return err; | |
487 | ||
488 | rv8803->rtc->max_user_freq = 1; | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
493 | static int rv8803_remove(struct i2c_client *client) | |
494 | { | |
495 | device_remove_bin_file(&client->dev, &rv8803_nvram_attr); | |
496 | ||
497 | return 0; | |
498 | } | |
499 | ||
500 | static const struct i2c_device_id rv8803_id[] = { | |
501 | { "rv8803", 0 }, | |
78ef5f2d | 502 | { "rx8900", 0 }, |
1e3929ef AB |
503 | { } |
504 | }; | |
505 | MODULE_DEVICE_TABLE(i2c, rv8803_id); | |
506 | ||
507 | static struct i2c_driver rv8803_driver = { | |
508 | .driver = { | |
509 | .name = "rtc-rv8803", | |
510 | }, | |
511 | .probe = rv8803_probe, | |
512 | .remove = rv8803_remove, | |
513 | .id_table = rv8803_id, | |
514 | }; | |
515 | module_i2c_driver(rv8803_driver); | |
516 | ||
517 | MODULE_AUTHOR("Alexandre Belloni <alexandre.belloni@free-electrons.com>"); | |
518 | MODULE_DESCRIPTION("Micro Crystal RV8803 RTC driver"); | |
519 | MODULE_LICENSE("GPL v2"); |