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1 | /* rtc-ds1343.c |
2 | * | |
3 | * Driver for Dallas Semiconductor DS1343 Low Current, SPI Compatible | |
4 | * Real Time Clock | |
5 | * | |
6 | * Author : Raghavendra Chandra Ganiga <ravi23ganiga@gmail.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/init.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/spi/spi.h> | |
19 | #include <linux/regmap.h> | |
20 | #include <linux/rtc.h> | |
21 | #include <linux/bcd.h> | |
22 | #include <linux/pm.h> | |
23 | #include <linux/slab.h> | |
24 | ||
25 | #define DS1343_DRV_VERSION "01.00" | |
26 | #define DALLAS_MAXIM_DS1343 0 | |
27 | #define DALLAS_MAXIM_DS1344 1 | |
28 | ||
29 | /* RTC DS1343 Registers */ | |
30 | #define DS1343_SECONDS_REG 0x00 | |
31 | #define DS1343_MINUTES_REG 0x01 | |
32 | #define DS1343_HOURS_REG 0x02 | |
33 | #define DS1343_DAY_REG 0x03 | |
34 | #define DS1343_DATE_REG 0x04 | |
35 | #define DS1343_MONTH_REG 0x05 | |
36 | #define DS1343_YEAR_REG 0x06 | |
37 | #define DS1343_ALM0_SEC_REG 0x07 | |
38 | #define DS1343_ALM0_MIN_REG 0x08 | |
39 | #define DS1343_ALM0_HOUR_REG 0x09 | |
40 | #define DS1343_ALM0_DAY_REG 0x0A | |
41 | #define DS1343_ALM1_SEC_REG 0x0B | |
42 | #define DS1343_ALM1_MIN_REG 0x0C | |
43 | #define DS1343_ALM1_HOUR_REG 0x0D | |
44 | #define DS1343_ALM1_DAY_REG 0x0E | |
45 | #define DS1343_CONTROL_REG 0x0F | |
46 | #define DS1343_STATUS_REG 0x10 | |
47 | #define DS1343_TRICKLE_REG 0x11 | |
48 | ||
49 | /* DS1343 Control Registers bits */ | |
50 | #define DS1343_EOSC 0x80 | |
51 | #define DS1343_DOSF 0x20 | |
52 | #define DS1343_EGFIL 0x10 | |
53 | #define DS1343_SQW 0x08 | |
54 | #define DS1343_INTCN 0x04 | |
55 | #define DS1343_A1IE 0x02 | |
56 | #define DS1343_A0IE 0x01 | |
57 | ||
58 | /* DS1343 Status Registers bits */ | |
59 | #define DS1343_OSF 0x80 | |
60 | #define DS1343_IRQF1 0x02 | |
61 | #define DS1343_IRQF0 0x01 | |
62 | ||
63 | /* DS1343 Trickle Charger Registers bits */ | |
64 | #define DS1343_TRICKLE_MAGIC 0xa0 | |
65 | #define DS1343_TRICKLE_DS1 0x08 | |
66 | #define DS1343_TRICKLE_1K 0x01 | |
67 | #define DS1343_TRICKLE_2K 0x02 | |
68 | #define DS1343_TRICKLE_4K 0x03 | |
69 | ||
70 | static const struct spi_device_id ds1343_id[] = { | |
71 | { "ds1343", DALLAS_MAXIM_DS1343 }, | |
72 | { "ds1344", DALLAS_MAXIM_DS1344 }, | |
73 | { } | |
74 | }; | |
75 | MODULE_DEVICE_TABLE(spi, ds1343_id); | |
76 | ||
77 | struct ds1343_priv { | |
78 | struct spi_device *spi; | |
79 | struct rtc_device *rtc; | |
80 | struct regmap *map; | |
81 | struct mutex mutex; | |
82 | unsigned int irqen; | |
83 | int alarm_sec; | |
84 | int alarm_min; | |
85 | int alarm_hour; | |
86 | int alarm_mday; | |
87 | }; | |
88 | ||
89 | static int ds1343_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) | |
90 | { | |
91 | switch (cmd) { | |
92 | #ifdef RTC_SET_CHARGE | |
93 | case RTC_SET_CHARGE: | |
94 | { | |
95 | int val; | |
96 | ||
97 | if (copy_from_user(&val, (int __user *)arg, sizeof(int))) | |
98 | return -EFAULT; | |
99 | ||
100 | return regmap_write(priv->map, DS1343_TRICKLE_REG, val); | |
101 | } | |
102 | break; | |
103 | #endif | |
104 | } | |
105 | ||
106 | return -ENOIOCTLCMD; | |
107 | } | |
108 | ||
109 | static ssize_t ds1343_show_glitchfilter(struct device *dev, | |
110 | struct device_attribute *attr, char *buf) | |
111 | { | |
112 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
113 | int glitch_filt_status, data; | |
114 | ||
115 | regmap_read(priv->map, DS1343_CONTROL_REG, &data); | |
116 | ||
117 | glitch_filt_status = !!(data & DS1343_EGFIL); | |
118 | ||
119 | if (glitch_filt_status) | |
120 | return sprintf(buf, "enabled\n"); | |
121 | else | |
122 | return sprintf(buf, "disabled\n"); | |
123 | } | |
124 | ||
125 | static ssize_t ds1343_store_glitchfilter(struct device *dev, | |
126 | struct device_attribute *attr, | |
127 | const char *buf, size_t count) | |
128 | { | |
129 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
130 | int data; | |
131 | ||
132 | regmap_read(priv->map, DS1343_CONTROL_REG, &data); | |
133 | ||
134 | if (strncmp(buf, "enabled", 7) == 0) | |
135 | data |= DS1343_EGFIL; | |
136 | ||
137 | else if (strncmp(buf, "disabled", 8) == 0) | |
138 | data &= ~(DS1343_EGFIL); | |
139 | ||
140 | else | |
141 | return -EINVAL; | |
142 | ||
143 | regmap_write(priv->map, DS1343_CONTROL_REG, data); | |
144 | ||
145 | return count; | |
146 | } | |
147 | ||
148 | static DEVICE_ATTR(glitch_filter, S_IRUGO | S_IWUSR, ds1343_show_glitchfilter, | |
149 | ds1343_store_glitchfilter); | |
150 | ||
151 | static ssize_t ds1343_show_alarmstatus(struct device *dev, | |
152 | struct device_attribute *attr, char *buf) | |
153 | { | |
154 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
155 | int alarmstatus, data; | |
156 | ||
157 | regmap_read(priv->map, DS1343_CONTROL_REG, &data); | |
158 | ||
159 | alarmstatus = !!(data & DS1343_A0IE); | |
160 | ||
161 | if (alarmstatus) | |
162 | return sprintf(buf, "enabled\n"); | |
163 | else | |
164 | return sprintf(buf, "disabled\n"); | |
165 | } | |
166 | ||
167 | static DEVICE_ATTR(alarm_status, S_IRUGO, ds1343_show_alarmstatus, NULL); | |
168 | ||
169 | static ssize_t ds1343_show_alarmmode(struct device *dev, | |
170 | struct device_attribute *attr, char *buf) | |
171 | { | |
172 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
173 | int alarm_mode, data; | |
174 | char *alarm_str; | |
175 | ||
176 | regmap_read(priv->map, DS1343_ALM0_SEC_REG, &data); | |
177 | alarm_mode = (data & 0x80) >> 4; | |
178 | ||
179 | regmap_read(priv->map, DS1343_ALM0_MIN_REG, &data); | |
180 | alarm_mode |= (data & 0x80) >> 5; | |
181 | ||
182 | regmap_read(priv->map, DS1343_ALM0_HOUR_REG, &data); | |
183 | alarm_mode |= (data & 0x80) >> 6; | |
184 | ||
185 | regmap_read(priv->map, DS1343_ALM0_DAY_REG, &data); | |
186 | alarm_mode |= (data & 0x80) >> 7; | |
187 | ||
188 | switch (alarm_mode) { | |
189 | case 15: | |
190 | alarm_str = "each second"; | |
191 | break; | |
192 | ||
193 | case 7: | |
194 | alarm_str = "seconds match"; | |
195 | break; | |
196 | ||
197 | case 3: | |
198 | alarm_str = "minutes and seconds match"; | |
199 | break; | |
200 | ||
201 | case 1: | |
202 | alarm_str = "hours, minutes and seconds match"; | |
203 | break; | |
204 | ||
205 | case 0: | |
206 | alarm_str = "day, hours, minutes and seconds match"; | |
207 | break; | |
208 | ||
209 | default: | |
210 | alarm_str = "invalid"; | |
211 | break; | |
212 | } | |
213 | ||
214 | return sprintf(buf, "%s\n", alarm_str); | |
215 | } | |
216 | ||
217 | static DEVICE_ATTR(alarm_mode, S_IRUGO, ds1343_show_alarmmode, NULL); | |
218 | ||
219 | static ssize_t ds1343_show_tricklecharger(struct device *dev, | |
220 | struct device_attribute *attr, char *buf) | |
221 | { | |
222 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
223 | int data; | |
224 | char *diodes = "disabled", *resistors = " "; | |
225 | ||
226 | regmap_read(priv->map, DS1343_TRICKLE_REG, &data); | |
227 | ||
228 | if ((data & 0xf0) == DS1343_TRICKLE_MAGIC) { | |
229 | switch (data & 0x0c) { | |
230 | case DS1343_TRICKLE_DS1: | |
231 | diodes = "one diode,"; | |
232 | break; | |
233 | ||
234 | default: | |
235 | diodes = "no diode,"; | |
236 | break; | |
237 | } | |
238 | ||
239 | switch (data & 0x03) { | |
240 | case DS1343_TRICKLE_1K: | |
241 | resistors = "1k Ohm"; | |
242 | break; | |
243 | ||
244 | case DS1343_TRICKLE_2K: | |
245 | resistors = "2k Ohm"; | |
246 | break; | |
247 | ||
248 | case DS1343_TRICKLE_4K: | |
249 | resistors = "4k Ohm"; | |
250 | break; | |
251 | ||
252 | default: | |
253 | diodes = "disabled"; | |
254 | break; | |
255 | } | |
256 | } | |
257 | ||
258 | return sprintf(buf, "%s %s\n", diodes, resistors); | |
259 | } | |
260 | ||
261 | static DEVICE_ATTR(trickle_charger, S_IRUGO, ds1343_show_tricklecharger, NULL); | |
262 | ||
263 | static int ds1343_sysfs_register(struct device *dev) | |
264 | { | |
265 | int err; | |
266 | ||
267 | err = device_create_file(dev, &dev_attr_glitch_filter); | |
268 | if (err) | |
269 | return err; | |
270 | ||
271 | err = device_create_file(dev, &dev_attr_alarm_status); | |
272 | if (err) | |
273 | goto error1; | |
274 | ||
275 | err = device_create_file(dev, &dev_attr_alarm_mode); | |
276 | if (err) | |
277 | goto error2; | |
278 | ||
279 | err = device_create_file(dev, &dev_attr_trickle_charger); | |
280 | if (!err) | |
281 | return err; | |
282 | ||
283 | device_remove_file(dev, &dev_attr_alarm_mode); | |
284 | ||
285 | error2: | |
286 | device_remove_file(dev, &dev_attr_alarm_status); | |
287 | ||
288 | error1: | |
289 | device_remove_file(dev, &dev_attr_glitch_filter); | |
290 | ||
291 | return err; | |
292 | } | |
293 | ||
294 | static void ds1343_sysfs_unregister(struct device *dev) | |
295 | { | |
296 | device_remove_file(dev, &dev_attr_glitch_filter); | |
297 | device_remove_file(dev, &dev_attr_alarm_status); | |
298 | device_remove_file(dev, &dev_attr_alarm_mode); | |
299 | device_remove_file(dev, &dev_attr_trickle_charger); | |
300 | } | |
301 | ||
302 | static int ds1343_read_time(struct device *dev, struct rtc_time *dt) | |
303 | { | |
304 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
305 | unsigned char buf[7]; | |
306 | int res; | |
307 | ||
308 | res = regmap_bulk_read(priv->map, DS1343_SECONDS_REG, buf, 7); | |
309 | if (res) | |
310 | return res; | |
311 | ||
312 | dt->tm_sec = bcd2bin(buf[0]); | |
313 | dt->tm_min = bcd2bin(buf[1]); | |
314 | dt->tm_hour = bcd2bin(buf[2] & 0x3F); | |
315 | dt->tm_wday = bcd2bin(buf[3]) - 1; | |
316 | dt->tm_mday = bcd2bin(buf[4]); | |
317 | dt->tm_mon = bcd2bin(buf[5] & 0x1F) - 1; | |
318 | dt->tm_year = bcd2bin(buf[6]) + 100; /* year offset from 1900 */ | |
319 | ||
320 | return rtc_valid_tm(dt); | |
321 | } | |
322 | ||
323 | static int ds1343_set_time(struct device *dev, struct rtc_time *dt) | |
324 | { | |
325 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
326 | int res; | |
327 | ||
328 | res = regmap_write(priv->map, DS1343_SECONDS_REG, | |
329 | bin2bcd(dt->tm_sec)); | |
330 | if (res) | |
331 | return res; | |
332 | ||
333 | res = regmap_write(priv->map, DS1343_MINUTES_REG, | |
334 | bin2bcd(dt->tm_min)); | |
335 | if (res) | |
336 | return res; | |
337 | ||
338 | res = regmap_write(priv->map, DS1343_HOURS_REG, | |
339 | bin2bcd(dt->tm_hour) & 0x3F); | |
340 | if (res) | |
341 | return res; | |
342 | ||
343 | res = regmap_write(priv->map, DS1343_DAY_REG, | |
344 | bin2bcd(dt->tm_wday + 1)); | |
345 | if (res) | |
346 | return res; | |
347 | ||
348 | res = regmap_write(priv->map, DS1343_DATE_REG, | |
349 | bin2bcd(dt->tm_mday)); | |
350 | if (res) | |
351 | return res; | |
352 | ||
353 | res = regmap_write(priv->map, DS1343_MONTH_REG, | |
354 | bin2bcd(dt->tm_mon + 1)); | |
355 | if (res) | |
356 | return res; | |
357 | ||
358 | dt->tm_year %= 100; | |
359 | ||
360 | res = regmap_write(priv->map, DS1343_YEAR_REG, | |
361 | bin2bcd(dt->tm_year)); | |
362 | if (res) | |
363 | return res; | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
368 | static int ds1343_update_alarm(struct device *dev) | |
369 | { | |
370 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
371 | unsigned int control, stat; | |
372 | unsigned char buf[4]; | |
373 | int res = 0; | |
374 | ||
375 | res = regmap_read(priv->map, DS1343_CONTROL_REG, &control); | |
376 | if (res) | |
377 | return res; | |
378 | ||
379 | res = regmap_read(priv->map, DS1343_STATUS_REG, &stat); | |
380 | if (res) | |
381 | return res; | |
382 | ||
383 | control &= ~(DS1343_A0IE); | |
384 | stat &= ~(DS1343_IRQF0); | |
385 | ||
386 | res = regmap_write(priv->map, DS1343_CONTROL_REG, control); | |
387 | if (res) | |
388 | return res; | |
389 | ||
390 | res = regmap_write(priv->map, DS1343_STATUS_REG, stat); | |
391 | if (res) | |
392 | return res; | |
393 | ||
394 | buf[0] = priv->alarm_sec < 0 || (priv->irqen & RTC_UF) ? | |
395 | 0x80 : bin2bcd(priv->alarm_sec) & 0x7F; | |
396 | buf[1] = priv->alarm_min < 0 || (priv->irqen & RTC_UF) ? | |
397 | 0x80 : bin2bcd(priv->alarm_min) & 0x7F; | |
398 | buf[2] = priv->alarm_hour < 0 || (priv->irqen & RTC_UF) ? | |
399 | 0x80 : bin2bcd(priv->alarm_hour) & 0x3F; | |
400 | buf[3] = priv->alarm_mday < 0 || (priv->irqen & RTC_UF) ? | |
401 | 0x80 : bin2bcd(priv->alarm_mday) & 0x7F; | |
402 | ||
403 | res = regmap_bulk_write(priv->map, DS1343_ALM0_SEC_REG, buf, 4); | |
404 | if (res) | |
405 | return res; | |
406 | ||
407 | if (priv->irqen) { | |
408 | control |= DS1343_A0IE; | |
409 | res = regmap_write(priv->map, DS1343_CONTROL_REG, control); | |
410 | } | |
411 | ||
412 | return res; | |
413 | } | |
414 | ||
415 | static int ds1343_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) | |
416 | { | |
417 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
418 | struct spi_device *spi = priv->spi; | |
419 | int res = 0; | |
420 | unsigned int stat; | |
421 | ||
422 | if (spi->irq <= 0) | |
423 | return -EINVAL; | |
424 | ||
425 | mutex_lock(&priv->mutex); | |
426 | ||
427 | res = regmap_read(priv->map, DS1343_STATUS_REG, &stat); | |
428 | if (res) | |
429 | goto out; | |
430 | ||
431 | alarm->enabled = !!(priv->irqen & RTC_AF); | |
432 | alarm->pending = !!(stat & DS1343_IRQF0); | |
433 | ||
434 | alarm->time.tm_sec = priv->alarm_sec < 0 ? 0 : priv->alarm_sec; | |
435 | alarm->time.tm_min = priv->alarm_min < 0 ? 0 : priv->alarm_min; | |
436 | alarm->time.tm_hour = priv->alarm_hour < 0 ? 0 : priv->alarm_hour; | |
437 | alarm->time.tm_mday = priv->alarm_mday < 0 ? 0 : priv->alarm_mday; | |
438 | ||
439 | alarm->time.tm_mon = -1; | |
440 | alarm->time.tm_year = -1; | |
441 | alarm->time.tm_wday = -1; | |
442 | alarm->time.tm_yday = -1; | |
443 | alarm->time.tm_isdst = -1; | |
444 | ||
445 | out: | |
446 | mutex_unlock(&priv->mutex); | |
447 | return res; | |
448 | } | |
449 | ||
450 | static int ds1343_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) | |
451 | { | |
452 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
453 | struct spi_device *spi = priv->spi; | |
454 | int res = 0; | |
455 | ||
456 | if (spi->irq <= 0) | |
457 | return -EINVAL; | |
458 | ||
459 | mutex_lock(&priv->mutex); | |
460 | ||
461 | priv->alarm_sec = alarm->time.tm_sec; | |
462 | priv->alarm_min = alarm->time.tm_min; | |
463 | priv->alarm_hour = alarm->time.tm_hour; | |
464 | priv->alarm_mday = alarm->time.tm_mday; | |
465 | ||
466 | if (alarm->enabled) | |
467 | priv->irqen |= RTC_AF; | |
468 | ||
469 | res = ds1343_update_alarm(dev); | |
470 | ||
471 | mutex_unlock(&priv->mutex); | |
472 | ||
473 | return res; | |
474 | } | |
475 | ||
476 | static int ds1343_alarm_irq_enable(struct device *dev, unsigned int enabled) | |
477 | { | |
478 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
479 | struct spi_device *spi = priv->spi; | |
480 | int res = 0; | |
481 | ||
482 | if (spi->irq <= 0) | |
483 | return -EINVAL; | |
484 | ||
485 | mutex_lock(&priv->mutex); | |
486 | ||
487 | if (enabled) | |
488 | priv->irqen |= RTC_AF; | |
489 | else | |
490 | priv->irqen &= ~RTC_AF; | |
491 | ||
492 | res = ds1343_update_alarm(dev); | |
493 | ||
494 | mutex_unlock(&priv->mutex); | |
495 | ||
496 | return res; | |
497 | } | |
498 | ||
499 | static irqreturn_t ds1343_thread(int irq, void *dev_id) | |
500 | { | |
501 | struct ds1343_priv *priv = dev_id; | |
502 | unsigned int stat, control; | |
503 | int res = 0; | |
504 | ||
505 | mutex_lock(&priv->mutex); | |
506 | ||
507 | res = regmap_read(priv->map, DS1343_STATUS_REG, &stat); | |
508 | if (res) | |
509 | goto out; | |
510 | ||
511 | if (stat & DS1343_IRQF0) { | |
512 | stat &= ~DS1343_IRQF0; | |
513 | regmap_write(priv->map, DS1343_STATUS_REG, stat); | |
514 | ||
515 | res = regmap_read(priv->map, DS1343_CONTROL_REG, &control); | |
516 | if (res) | |
517 | goto out; | |
518 | ||
519 | control &= ~DS1343_A0IE; | |
520 | regmap_write(priv->map, DS1343_CONTROL_REG, control); | |
521 | ||
522 | rtc_update_irq(priv->rtc, 1, RTC_AF | RTC_IRQF); | |
523 | } | |
524 | ||
525 | out: | |
526 | mutex_unlock(&priv->mutex); | |
527 | return IRQ_HANDLED; | |
528 | } | |
529 | ||
530 | static const struct rtc_class_ops ds1343_rtc_ops = { | |
531 | .ioctl = ds1343_ioctl, | |
532 | .read_time = ds1343_read_time, | |
533 | .set_time = ds1343_set_time, | |
534 | .read_alarm = ds1343_read_alarm, | |
535 | .set_alarm = ds1343_set_alarm, | |
536 | .alarm_irq_enable = ds1343_alarm_irq_enable, | |
537 | }; | |
538 | ||
539 | static int ds1343_probe(struct spi_device *spi) | |
540 | { | |
541 | struct ds1343_priv *priv; | |
542 | struct regmap_config config; | |
543 | unsigned int data; | |
544 | int res; | |
545 | ||
546 | memset(&config, 0, sizeof(config)); | |
547 | config.reg_bits = 8; | |
548 | config.val_bits = 8; | |
549 | config.write_flag_mask = 0x80; | |
550 | ||
551 | priv = devm_kzalloc(&spi->dev, sizeof(struct ds1343_priv), GFP_KERNEL); | |
552 | if (!priv) | |
553 | return -ENOMEM; | |
554 | ||
555 | priv->spi = spi; | |
556 | mutex_init(&priv->mutex); | |
557 | ||
558 | /* RTC DS1347 works in spi mode 3 and | |
559 | * its chip select is active high | |
560 | */ | |
561 | spi->mode = SPI_MODE_3 | SPI_CS_HIGH; | |
562 | spi->bits_per_word = 8; | |
563 | res = spi_setup(spi); | |
564 | if (res) | |
565 | return res; | |
566 | ||
567 | spi_set_drvdata(spi, priv); | |
568 | ||
569 | priv->map = devm_regmap_init_spi(spi, &config); | |
570 | ||
571 | if (IS_ERR(priv->map)) { | |
572 | dev_err(&spi->dev, "spi regmap init failed for rtc ds1343\n"); | |
573 | return PTR_ERR(priv->map); | |
574 | } | |
575 | ||
576 | res = regmap_read(priv->map, DS1343_SECONDS_REG, &data); | |
577 | if (res) | |
578 | return res; | |
579 | ||
580 | regmap_read(priv->map, DS1343_CONTROL_REG, &data); | |
581 | data |= DS1343_INTCN; | |
582 | data &= ~(DS1343_EOSC | DS1343_A1IE | DS1343_A0IE); | |
583 | regmap_write(priv->map, DS1343_CONTROL_REG, data); | |
584 | ||
585 | regmap_read(priv->map, DS1343_STATUS_REG, &data); | |
586 | data &= ~(DS1343_OSF | DS1343_IRQF1 | DS1343_IRQF0); | |
587 | regmap_write(priv->map, DS1343_STATUS_REG, data); | |
588 | ||
589 | priv->rtc = devm_rtc_device_register(&spi->dev, "ds1343", | |
590 | &ds1343_rtc_ops, THIS_MODULE); | |
591 | if (IS_ERR(priv->rtc)) { | |
592 | dev_err(&spi->dev, "unable to register rtc ds1343\n"); | |
593 | return PTR_ERR(priv->rtc); | |
594 | } | |
595 | ||
596 | if (spi->irq >= 0) { | |
597 | res = devm_request_threaded_irq(&spi->dev, spi->irq, NULL, | |
598 | ds1343_thread, | |
599 | IRQF_NO_SUSPEND | IRQF_ONESHOT, | |
600 | "ds1343", priv); | |
601 | if (res) { | |
602 | dev_err(&spi->dev, | |
603 | "unable to request irq for rtc ds1343\n"); | |
604 | return res; | |
605 | } | |
606 | ||
607 | device_set_wakeup_capable(&spi->dev, 1); | |
608 | } | |
609 | ||
610 | res = ds1343_sysfs_register(&spi->dev); | |
611 | if (res) | |
612 | dev_err(&spi->dev, | |
613 | "unable to create sysfs entries for rtc ds1343\n"); | |
614 | ||
615 | return 0; | |
616 | } | |
617 | ||
618 | static int ds1343_remove(struct spi_device *spi) | |
619 | { | |
620 | struct ds1343_priv *priv = spi_get_drvdata(spi); | |
621 | ||
622 | if (spi->irq) { | |
623 | mutex_lock(&priv->mutex); | |
624 | priv->irqen &= ~RTC_AF; | |
625 | mutex_unlock(&priv->mutex); | |
626 | ||
627 | devm_free_irq(&spi->dev, spi->irq, priv); | |
628 | } | |
629 | ||
630 | spi_set_drvdata(spi, NULL); | |
631 | ||
632 | ds1343_sysfs_unregister(&spi->dev); | |
633 | ||
634 | return 0; | |
635 | } | |
636 | ||
637 | #ifdef CONFIG_PM_SLEEP | |
638 | ||
639 | static int ds1343_suspend(struct device *dev) | |
640 | { | |
641 | struct spi_device *spi = to_spi_device(dev); | |
642 | ||
643 | if (spi->irq >= 0 && device_may_wakeup(dev)) | |
644 | enable_irq_wake(spi->irq); | |
645 | ||
646 | return 0; | |
647 | } | |
648 | ||
649 | static int ds1343_resume(struct device *dev) | |
650 | { | |
651 | struct spi_device *spi = to_spi_device(dev); | |
652 | ||
653 | if (spi->irq >= 0 && device_may_wakeup(dev)) | |
654 | disable_irq_wake(spi->irq); | |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
659 | #endif | |
660 | ||
661 | static SIMPLE_DEV_PM_OPS(ds1343_pm, ds1343_suspend, ds1343_resume); | |
662 | ||
663 | static struct spi_driver ds1343_driver = { | |
664 | .driver = { | |
665 | .name = "ds1343", | |
666 | .owner = THIS_MODULE, | |
667 | .pm = &ds1343_pm, | |
668 | }, | |
669 | .probe = ds1343_probe, | |
670 | .remove = ds1343_remove, | |
671 | .id_table = ds1343_id, | |
672 | }; | |
673 | ||
674 | module_spi_driver(ds1343_driver); | |
675 | ||
676 | MODULE_DESCRIPTION("DS1343 RTC SPI Driver"); | |
677 | MODULE_AUTHOR("Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>"); | |
678 | MODULE_LICENSE("GPL v2"); | |
679 | MODULE_VERSION(DS1343_DRV_VERSION); |