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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; | |
85062c9b | 64 | int flags, try = 0; |
1e3929ef | 65 | |
9d1fa4c3 | 66 | mutex_lock(&rv8803->flags_lock); |
1e3929ef | 67 | |
85062c9b AB |
68 | do { |
69 | flags = i2c_smbus_read_byte_data(client, RV8803_FLAG); | |
70 | try++; | |
71 | } while ((flags == -ENXIO) && (try < 3)); | |
1e3929ef | 72 | if (flags <= 0) { |
9d1fa4c3 | 73 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
74 | return IRQ_NONE; |
75 | } | |
76 | ||
77 | if (flags & RV8803_FLAG_V1F) | |
78 | dev_warn(&client->dev, "Voltage low, temperature compensation stopped.\n"); | |
79 | ||
80 | if (flags & RV8803_FLAG_V2F) | |
81 | dev_warn(&client->dev, "Voltage low, data loss detected.\n"); | |
82 | ||
83 | if (flags & RV8803_FLAG_TF) { | |
84 | flags &= ~RV8803_FLAG_TF; | |
85 | rv8803->ctrl &= ~RV8803_CTRL_TIE; | |
86 | events |= RTC_PF; | |
87 | } | |
88 | ||
89 | if (flags & RV8803_FLAG_AF) { | |
90 | flags &= ~RV8803_FLAG_AF; | |
91 | rv8803->ctrl &= ~RV8803_CTRL_AIE; | |
92 | events |= RTC_AF; | |
93 | } | |
94 | ||
95 | if (flags & RV8803_FLAG_UF) { | |
96 | flags &= ~RV8803_FLAG_UF; | |
97 | rv8803->ctrl &= ~RV8803_CTRL_UIE; | |
98 | events |= RTC_UF; | |
99 | } | |
100 | ||
101 | if (events) { | |
102 | rtc_update_irq(rv8803->rtc, 1, events); | |
103 | i2c_smbus_write_byte_data(client, RV8803_FLAG, flags); | |
104 | i2c_smbus_write_byte_data(rv8803->client, RV8803_CTRL, | |
105 | rv8803->ctrl); | |
106 | } | |
107 | ||
9d1fa4c3 | 108 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
109 | |
110 | return IRQ_HANDLED; | |
111 | } | |
112 | ||
113 | static int rv8803_get_time(struct device *dev, struct rtc_time *tm) | |
114 | { | |
115 | struct rv8803_data *rv8803 = dev_get_drvdata(dev); | |
116 | u8 date1[7]; | |
117 | u8 date2[7]; | |
118 | u8 *date = date1; | |
119 | int ret, flags; | |
120 | ||
121 | flags = i2c_smbus_read_byte_data(rv8803->client, RV8803_FLAG); | |
122 | if (flags < 0) | |
123 | return flags; | |
124 | ||
125 | if (flags & RV8803_FLAG_V2F) { | |
126 | dev_warn(dev, "Voltage low, data is invalid.\n"); | |
127 | return -EINVAL; | |
128 | } | |
129 | ||
130 | ret = i2c_smbus_read_i2c_block_data(rv8803->client, RV8803_SEC, | |
131 | 7, date); | |
132 | if (ret != 7) | |
133 | return ret < 0 ? ret : -EIO; | |
134 | ||
135 | if ((date1[RV8803_SEC] & 0x7f) == bin2bcd(59)) { | |
136 | ret = i2c_smbus_read_i2c_block_data(rv8803->client, RV8803_SEC, | |
137 | 7, date2); | |
138 | if (ret != 7) | |
139 | return ret < 0 ? ret : -EIO; | |
140 | ||
141 | if ((date2[RV8803_SEC] & 0x7f) != bin2bcd(59)) | |
142 | date = date2; | |
143 | } | |
144 | ||
145 | tm->tm_sec = bcd2bin(date[RV8803_SEC] & 0x7f); | |
146 | tm->tm_min = bcd2bin(date[RV8803_MIN] & 0x7f); | |
147 | tm->tm_hour = bcd2bin(date[RV8803_HOUR] & 0x3f); | |
148 | tm->tm_wday = ffs(date[RV8803_WEEK] & 0x7f); | |
149 | tm->tm_mday = bcd2bin(date[RV8803_DAY] & 0x3f); | |
150 | tm->tm_mon = bcd2bin(date[RV8803_MONTH] & 0x1f) - 1; | |
151 | tm->tm_year = bcd2bin(date[RV8803_YEAR]) + 100; | |
152 | ||
153 | return rtc_valid_tm(tm); | |
154 | } | |
155 | ||
156 | static int rv8803_set_time(struct device *dev, struct rtc_time *tm) | |
157 | { | |
158 | struct rv8803_data *rv8803 = dev_get_drvdata(dev); | |
159 | u8 date[7]; | |
160 | int flags, ret; | |
1e3929ef AB |
161 | |
162 | if ((tm->tm_year < 100) || (tm->tm_year > 199)) | |
163 | return -EINVAL; | |
164 | ||
165 | date[RV8803_SEC] = bin2bcd(tm->tm_sec); | |
166 | date[RV8803_MIN] = bin2bcd(tm->tm_min); | |
167 | date[RV8803_HOUR] = bin2bcd(tm->tm_hour); | |
168 | date[RV8803_WEEK] = 1 << (tm->tm_wday); | |
169 | date[RV8803_DAY] = bin2bcd(tm->tm_mday); | |
170 | date[RV8803_MONTH] = bin2bcd(tm->tm_mon + 1); | |
171 | date[RV8803_YEAR] = bin2bcd(tm->tm_year - 100); | |
172 | ||
173 | ret = i2c_smbus_write_i2c_block_data(rv8803->client, RV8803_SEC, | |
174 | 7, date); | |
175 | if (ret < 0) | |
176 | return ret; | |
177 | ||
9d1fa4c3 | 178 | mutex_lock(&rv8803->flags_lock); |
1e3929ef AB |
179 | |
180 | flags = i2c_smbus_read_byte_data(rv8803->client, RV8803_FLAG); | |
181 | if (flags < 0) { | |
9d1fa4c3 | 182 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
183 | return flags; |
184 | } | |
185 | ||
186 | ret = i2c_smbus_write_byte_data(rv8803->client, RV8803_FLAG, | |
187 | flags & ~RV8803_FLAG_V2F); | |
188 | ||
9d1fa4c3 | 189 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
190 | |
191 | return ret; | |
192 | } | |
193 | ||
194 | static int rv8803_get_alarm(struct device *dev, struct rtc_wkalrm *alrm) | |
195 | { | |
196 | struct rv8803_data *rv8803 = dev_get_drvdata(dev); | |
197 | struct i2c_client *client = rv8803->client; | |
198 | u8 alarmvals[3]; | |
199 | int flags, ret; | |
200 | ||
201 | ret = i2c_smbus_read_i2c_block_data(client, RV8803_ALARM_MIN, | |
202 | 3, alarmvals); | |
203 | if (ret != 3) | |
204 | return ret < 0 ? ret : -EIO; | |
205 | ||
206 | flags = i2c_smbus_read_byte_data(client, RV8803_FLAG); | |
207 | if (flags < 0) | |
208 | return flags; | |
209 | ||
210 | alrm->time.tm_sec = 0; | |
211 | alrm->time.tm_min = bcd2bin(alarmvals[0] & 0x7f); | |
212 | alrm->time.tm_hour = bcd2bin(alarmvals[1] & 0x3f); | |
213 | alrm->time.tm_wday = -1; | |
214 | alrm->time.tm_mday = bcd2bin(alarmvals[2] & 0x3f); | |
215 | alrm->time.tm_mon = -1; | |
216 | alrm->time.tm_year = -1; | |
217 | ||
218 | alrm->enabled = !!(rv8803->ctrl & RV8803_CTRL_AIE); | |
219 | alrm->pending = (flags & RV8803_FLAG_AF) && alrm->enabled; | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | static int rv8803_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) | |
225 | { | |
226 | struct i2c_client *client = to_i2c_client(dev); | |
227 | struct rv8803_data *rv8803 = dev_get_drvdata(dev); | |
228 | u8 alarmvals[3]; | |
229 | u8 ctrl[2]; | |
230 | int ret, err; | |
1e3929ef AB |
231 | |
232 | /* The alarm has no seconds, round up to nearest minute */ | |
233 | if (alrm->time.tm_sec) { | |
234 | time64_t alarm_time = rtc_tm_to_time64(&alrm->time); | |
235 | ||
236 | alarm_time += 60 - alrm->time.tm_sec; | |
237 | rtc_time64_to_tm(alarm_time, &alrm->time); | |
238 | } | |
239 | ||
9d1fa4c3 | 240 | mutex_lock(&rv8803->flags_lock); |
1e3929ef AB |
241 | |
242 | ret = i2c_smbus_read_i2c_block_data(client, RV8803_FLAG, 2, ctrl); | |
243 | if (ret != 2) { | |
9d1fa4c3 | 244 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
245 | return ret < 0 ? ret : -EIO; |
246 | } | |
247 | ||
248 | alarmvals[0] = bin2bcd(alrm->time.tm_min); | |
249 | alarmvals[1] = bin2bcd(alrm->time.tm_hour); | |
250 | alarmvals[2] = bin2bcd(alrm->time.tm_mday); | |
251 | ||
252 | if (rv8803->ctrl & (RV8803_CTRL_AIE | RV8803_CTRL_UIE)) { | |
253 | rv8803->ctrl &= ~(RV8803_CTRL_AIE | RV8803_CTRL_UIE); | |
254 | err = i2c_smbus_write_byte_data(rv8803->client, RV8803_CTRL, | |
255 | rv8803->ctrl); | |
256 | if (err) { | |
9d1fa4c3 | 257 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
258 | return err; |
259 | } | |
260 | } | |
261 | ||
262 | ctrl[1] &= ~RV8803_FLAG_AF; | |
263 | err = i2c_smbus_write_byte_data(rv8803->client, RV8803_FLAG, ctrl[1]); | |
9d1fa4c3 | 264 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
265 | if (err) |
266 | return err; | |
267 | ||
268 | err = i2c_smbus_write_i2c_block_data(rv8803->client, RV8803_ALARM_MIN, | |
269 | 3, alarmvals); | |
270 | if (err) | |
271 | return err; | |
272 | ||
273 | if (alrm->enabled) { | |
274 | if (rv8803->rtc->uie_rtctimer.enabled) | |
275 | rv8803->ctrl |= RV8803_CTRL_UIE; | |
276 | if (rv8803->rtc->aie_timer.enabled) | |
277 | rv8803->ctrl |= RV8803_CTRL_AIE; | |
278 | ||
279 | err = i2c_smbus_write_byte_data(rv8803->client, RV8803_CTRL, | |
280 | rv8803->ctrl); | |
281 | if (err) | |
282 | return err; | |
283 | } | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | static int rv8803_alarm_irq_enable(struct device *dev, unsigned int enabled) | |
289 | { | |
290 | struct i2c_client *client = to_i2c_client(dev); | |
291 | struct rv8803_data *rv8803 = dev_get_drvdata(dev); | |
292 | int ctrl, flags, err; | |
1e3929ef AB |
293 | |
294 | ctrl = rv8803->ctrl; | |
295 | ||
296 | if (enabled) { | |
297 | if (rv8803->rtc->uie_rtctimer.enabled) | |
298 | ctrl |= RV8803_CTRL_UIE; | |
299 | if (rv8803->rtc->aie_timer.enabled) | |
300 | ctrl |= RV8803_CTRL_AIE; | |
301 | } else { | |
302 | if (!rv8803->rtc->uie_rtctimer.enabled) | |
303 | ctrl &= ~RV8803_CTRL_UIE; | |
304 | if (!rv8803->rtc->aie_timer.enabled) | |
305 | ctrl &= ~RV8803_CTRL_AIE; | |
306 | } | |
307 | ||
9d1fa4c3 | 308 | mutex_lock(&rv8803->flags_lock); |
1e3929ef AB |
309 | flags = i2c_smbus_read_byte_data(client, RV8803_FLAG); |
310 | if (flags < 0) { | |
9d1fa4c3 | 311 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
312 | return flags; |
313 | } | |
314 | flags &= ~(RV8803_FLAG_AF | RV8803_FLAG_UF); | |
315 | err = i2c_smbus_write_byte_data(client, RV8803_FLAG, flags); | |
9d1fa4c3 | 316 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
317 | if (err) |
318 | return err; | |
319 | ||
320 | if (ctrl != rv8803->ctrl) { | |
321 | rv8803->ctrl = ctrl; | |
322 | err = i2c_smbus_write_byte_data(client, RV8803_CTRL, | |
323 | rv8803->ctrl); | |
324 | if (err) | |
325 | return err; | |
326 | } | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
331 | static int rv8803_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) | |
332 | { | |
333 | struct i2c_client *client = to_i2c_client(dev); | |
334 | struct rv8803_data *rv8803 = dev_get_drvdata(dev); | |
335 | int flags, ret = 0; | |
1e3929ef AB |
336 | |
337 | switch (cmd) { | |
338 | case RTC_VL_READ: | |
339 | flags = i2c_smbus_read_byte_data(client, RV8803_FLAG); | |
340 | if (flags < 0) | |
341 | return flags; | |
342 | ||
343 | if (flags & RV8803_FLAG_V1F) | |
344 | dev_warn(&client->dev, "Voltage low, temperature compensation stopped.\n"); | |
345 | ||
346 | if (flags & RV8803_FLAG_V2F) | |
347 | dev_warn(&client->dev, "Voltage low, data loss detected.\n"); | |
348 | ||
349 | flags &= RV8803_FLAG_V1F | RV8803_FLAG_V2F; | |
350 | ||
351 | if (copy_to_user((void __user *)arg, &flags, sizeof(int))) | |
352 | return -EFAULT; | |
353 | ||
354 | return 0; | |
355 | ||
356 | case RTC_VL_CLR: | |
9d1fa4c3 | 357 | mutex_lock(&rv8803->flags_lock); |
1e3929ef AB |
358 | flags = i2c_smbus_read_byte_data(client, RV8803_FLAG); |
359 | if (flags < 0) { | |
9d1fa4c3 | 360 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
361 | return flags; |
362 | } | |
363 | ||
364 | flags &= ~(RV8803_FLAG_V1F | RV8803_FLAG_V2F); | |
365 | ret = i2c_smbus_write_byte_data(client, RV8803_FLAG, flags); | |
9d1fa4c3 | 366 | mutex_unlock(&rv8803->flags_lock); |
1e3929ef AB |
367 | if (ret < 0) |
368 | return ret; | |
369 | ||
370 | return 0; | |
371 | ||
372 | default: | |
373 | return -ENOIOCTLCMD; | |
374 | } | |
375 | } | |
376 | ||
377 | static ssize_t rv8803_nvram_write(struct file *filp, struct kobject *kobj, | |
378 | struct bin_attribute *attr, | |
379 | char *buf, loff_t off, size_t count) | |
380 | { | |
381 | struct device *dev = kobj_to_dev(kobj); | |
382 | struct i2c_client *client = to_i2c_client(dev); | |
383 | int ret; | |
384 | ||
385 | ret = i2c_smbus_write_byte_data(client, RV8803_RAM, buf[0]); | |
386 | if (ret < 0) | |
387 | return ret; | |
388 | ||
389 | return 1; | |
390 | } | |
391 | ||
392 | static ssize_t rv8803_nvram_read(struct file *filp, struct kobject *kobj, | |
393 | struct bin_attribute *attr, | |
394 | char *buf, loff_t off, size_t count) | |
395 | { | |
396 | struct device *dev = kobj_to_dev(kobj); | |
397 | struct i2c_client *client = to_i2c_client(dev); | |
398 | int ret; | |
399 | ||
400 | ret = i2c_smbus_read_byte_data(client, RV8803_RAM); | |
401 | if (ret < 0) | |
402 | return ret; | |
403 | ||
404 | buf[0] = ret; | |
405 | ||
406 | return 1; | |
407 | } | |
408 | ||
409 | static struct bin_attribute rv8803_nvram_attr = { | |
410 | .attr = { | |
411 | .name = "nvram", | |
412 | .mode = S_IRUGO | S_IWUSR, | |
413 | }, | |
414 | .size = 1, | |
415 | .read = rv8803_nvram_read, | |
416 | .write = rv8803_nvram_write, | |
417 | }; | |
418 | ||
419 | static struct rtc_class_ops rv8803_rtc_ops = { | |
420 | .read_time = rv8803_get_time, | |
421 | .set_time = rv8803_set_time, | |
422 | .ioctl = rv8803_ioctl, | |
423 | }; | |
424 | ||
425 | static int rv8803_probe(struct i2c_client *client, | |
426 | const struct i2c_device_id *id) | |
427 | { | |
428 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); | |
429 | struct rv8803_data *rv8803; | |
85062c9b | 430 | int err, flags, try = 0; |
1e3929ef AB |
431 | |
432 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | | |
433 | I2C_FUNC_SMBUS_I2C_BLOCK)) { | |
434 | dev_err(&adapter->dev, "doesn't support I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_I2C_BLOCK\n"); | |
435 | return -EIO; | |
436 | } | |
437 | ||
438 | rv8803 = devm_kzalloc(&client->dev, sizeof(struct rv8803_data), | |
439 | GFP_KERNEL); | |
440 | if (!rv8803) | |
441 | return -ENOMEM; | |
442 | ||
9d1fa4c3 | 443 | mutex_init(&rv8803->flags_lock); |
1e3929ef AB |
444 | rv8803->client = client; |
445 | i2c_set_clientdata(client, rv8803); | |
446 | ||
85062c9b AB |
447 | /* |
448 | * There is a 60µs window where the RTC may not reply on the i2c bus in | |
449 | * that case, the transfer is not ACKed. In that case, ensure there are | |
450 | * multiple attempts. | |
451 | */ | |
452 | do { | |
453 | flags = i2c_smbus_read_byte_data(client, RV8803_FLAG); | |
454 | try++; | |
455 | } while ((flags == -ENXIO) && (try < 3)); | |
456 | ||
1e3929ef AB |
457 | if (flags < 0) |
458 | return flags; | |
459 | ||
460 | if (flags & RV8803_FLAG_V1F) | |
461 | dev_warn(&client->dev, "Voltage low, temperature compensation stopped.\n"); | |
462 | ||
463 | if (flags & RV8803_FLAG_V2F) | |
464 | dev_warn(&client->dev, "Voltage low, data loss detected.\n"); | |
465 | ||
466 | if (flags & RV8803_FLAG_AF) | |
467 | dev_warn(&client->dev, "An alarm maybe have been missed.\n"); | |
468 | ||
469 | if (client->irq > 0) { | |
470 | err = devm_request_threaded_irq(&client->dev, client->irq, | |
471 | NULL, rv8803_handle_irq, | |
472 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
473 | "rv8803", client); | |
474 | if (err) { | |
475 | dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n"); | |
476 | client->irq = 0; | |
477 | } else { | |
478 | rv8803_rtc_ops.read_alarm = rv8803_get_alarm; | |
479 | rv8803_rtc_ops.set_alarm = rv8803_set_alarm; | |
480 | rv8803_rtc_ops.alarm_irq_enable = rv8803_alarm_irq_enable; | |
481 | } | |
482 | } | |
483 | ||
484 | rv8803->rtc = devm_rtc_device_register(&client->dev, client->name, | |
485 | &rv8803_rtc_ops, THIS_MODULE); | |
486 | if (IS_ERR(rv8803->rtc)) { | |
487 | dev_err(&client->dev, "unable to register the class device\n"); | |
488 | return PTR_ERR(rv8803->rtc); | |
489 | } | |
490 | ||
85062c9b AB |
491 | try = 0; |
492 | do { | |
493 | err = i2c_smbus_write_byte_data(rv8803->client, RV8803_EXT, | |
494 | RV8803_EXT_WADA); | |
495 | try++; | |
496 | } while ((err == -ENXIO) && (try < 3)); | |
1e3929ef AB |
497 | if (err) |
498 | return err; | |
499 | ||
500 | err = device_create_bin_file(&client->dev, &rv8803_nvram_attr); | |
501 | if (err) | |
502 | return err; | |
503 | ||
504 | rv8803->rtc->max_user_freq = 1; | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | static int rv8803_remove(struct i2c_client *client) | |
510 | { | |
511 | device_remove_bin_file(&client->dev, &rv8803_nvram_attr); | |
512 | ||
513 | return 0; | |
514 | } | |
515 | ||
516 | static const struct i2c_device_id rv8803_id[] = { | |
517 | { "rv8803", 0 }, | |
78ef5f2d | 518 | { "rx8900", 0 }, |
1e3929ef AB |
519 | { } |
520 | }; | |
521 | MODULE_DEVICE_TABLE(i2c, rv8803_id); | |
522 | ||
523 | static struct i2c_driver rv8803_driver = { | |
524 | .driver = { | |
525 | .name = "rtc-rv8803", | |
526 | }, | |
527 | .probe = rv8803_probe, | |
528 | .remove = rv8803_remove, | |
529 | .id_table = rv8803_id, | |
530 | }; | |
531 | module_i2c_driver(rv8803_driver); | |
532 | ||
533 | MODULE_AUTHOR("Alexandre Belloni <alexandre.belloni@free-electrons.com>"); | |
534 | MODULE_DESCRIPTION("Micro Crystal RV8803 RTC driver"); | |
535 | MODULE_LICENSE("GPL v2"); |