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1d6316f5 RG |
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; | |
10b06b87 | 83 | int irq; |
1d6316f5 RG |
84 | int alarm_sec; |
85 | int alarm_min; | |
86 | int alarm_hour; | |
87 | int alarm_mday; | |
88 | }; | |
89 | ||
90 | static int ds1343_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) | |
91 | { | |
92 | switch (cmd) { | |
93 | #ifdef RTC_SET_CHARGE | |
94 | case RTC_SET_CHARGE: | |
95 | { | |
96 | int val; | |
97 | ||
98 | if (copy_from_user(&val, (int __user *)arg, sizeof(int))) | |
99 | return -EFAULT; | |
100 | ||
101 | return regmap_write(priv->map, DS1343_TRICKLE_REG, val); | |
102 | } | |
103 | break; | |
104 | #endif | |
105 | } | |
106 | ||
107 | return -ENOIOCTLCMD; | |
108 | } | |
109 | ||
110 | static ssize_t ds1343_show_glitchfilter(struct device *dev, | |
111 | struct device_attribute *attr, char *buf) | |
112 | { | |
113 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
114 | int glitch_filt_status, data; | |
115 | ||
116 | regmap_read(priv->map, DS1343_CONTROL_REG, &data); | |
117 | ||
118 | glitch_filt_status = !!(data & DS1343_EGFIL); | |
119 | ||
120 | if (glitch_filt_status) | |
121 | return sprintf(buf, "enabled\n"); | |
122 | else | |
123 | return sprintf(buf, "disabled\n"); | |
124 | } | |
125 | ||
126 | static ssize_t ds1343_store_glitchfilter(struct device *dev, | |
127 | struct device_attribute *attr, | |
128 | const char *buf, size_t count) | |
129 | { | |
130 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
131 | int data; | |
132 | ||
133 | regmap_read(priv->map, DS1343_CONTROL_REG, &data); | |
134 | ||
135 | if (strncmp(buf, "enabled", 7) == 0) | |
136 | data |= DS1343_EGFIL; | |
137 | ||
138 | else if (strncmp(buf, "disabled", 8) == 0) | |
139 | data &= ~(DS1343_EGFIL); | |
140 | ||
141 | else | |
142 | return -EINVAL; | |
143 | ||
144 | regmap_write(priv->map, DS1343_CONTROL_REG, data); | |
145 | ||
146 | return count; | |
147 | } | |
148 | ||
149 | static DEVICE_ATTR(glitch_filter, S_IRUGO | S_IWUSR, ds1343_show_glitchfilter, | |
150 | ds1343_store_glitchfilter); | |
151 | ||
152 | static ssize_t ds1343_show_alarmstatus(struct device *dev, | |
153 | struct device_attribute *attr, char *buf) | |
154 | { | |
155 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
156 | int alarmstatus, data; | |
157 | ||
158 | regmap_read(priv->map, DS1343_CONTROL_REG, &data); | |
159 | ||
160 | alarmstatus = !!(data & DS1343_A0IE); | |
161 | ||
162 | if (alarmstatus) | |
163 | return sprintf(buf, "enabled\n"); | |
164 | else | |
165 | return sprintf(buf, "disabled\n"); | |
166 | } | |
167 | ||
168 | static DEVICE_ATTR(alarm_status, S_IRUGO, ds1343_show_alarmstatus, NULL); | |
169 | ||
170 | static ssize_t ds1343_show_alarmmode(struct device *dev, | |
171 | struct device_attribute *attr, char *buf) | |
172 | { | |
173 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
174 | int alarm_mode, data; | |
175 | char *alarm_str; | |
176 | ||
177 | regmap_read(priv->map, DS1343_ALM0_SEC_REG, &data); | |
178 | alarm_mode = (data & 0x80) >> 4; | |
179 | ||
180 | regmap_read(priv->map, DS1343_ALM0_MIN_REG, &data); | |
181 | alarm_mode |= (data & 0x80) >> 5; | |
182 | ||
183 | regmap_read(priv->map, DS1343_ALM0_HOUR_REG, &data); | |
184 | alarm_mode |= (data & 0x80) >> 6; | |
185 | ||
186 | regmap_read(priv->map, DS1343_ALM0_DAY_REG, &data); | |
187 | alarm_mode |= (data & 0x80) >> 7; | |
188 | ||
189 | switch (alarm_mode) { | |
190 | case 15: | |
191 | alarm_str = "each second"; | |
192 | break; | |
193 | ||
194 | case 7: | |
195 | alarm_str = "seconds match"; | |
196 | break; | |
197 | ||
198 | case 3: | |
199 | alarm_str = "minutes and seconds match"; | |
200 | break; | |
201 | ||
202 | case 1: | |
203 | alarm_str = "hours, minutes and seconds match"; | |
204 | break; | |
205 | ||
206 | case 0: | |
207 | alarm_str = "day, hours, minutes and seconds match"; | |
208 | break; | |
209 | ||
210 | default: | |
211 | alarm_str = "invalid"; | |
212 | break; | |
213 | } | |
214 | ||
215 | return sprintf(buf, "%s\n", alarm_str); | |
216 | } | |
217 | ||
218 | static DEVICE_ATTR(alarm_mode, S_IRUGO, ds1343_show_alarmmode, NULL); | |
219 | ||
220 | static ssize_t ds1343_show_tricklecharger(struct device *dev, | |
221 | struct device_attribute *attr, char *buf) | |
222 | { | |
223 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
224 | int data; | |
225 | char *diodes = "disabled", *resistors = " "; | |
226 | ||
227 | regmap_read(priv->map, DS1343_TRICKLE_REG, &data); | |
228 | ||
229 | if ((data & 0xf0) == DS1343_TRICKLE_MAGIC) { | |
230 | switch (data & 0x0c) { | |
231 | case DS1343_TRICKLE_DS1: | |
232 | diodes = "one diode,"; | |
233 | break; | |
234 | ||
235 | default: | |
236 | diodes = "no diode,"; | |
237 | break; | |
238 | } | |
239 | ||
240 | switch (data & 0x03) { | |
241 | case DS1343_TRICKLE_1K: | |
242 | resistors = "1k Ohm"; | |
243 | break; | |
244 | ||
245 | case DS1343_TRICKLE_2K: | |
246 | resistors = "2k Ohm"; | |
247 | break; | |
248 | ||
249 | case DS1343_TRICKLE_4K: | |
250 | resistors = "4k Ohm"; | |
251 | break; | |
252 | ||
253 | default: | |
254 | diodes = "disabled"; | |
255 | break; | |
256 | } | |
257 | } | |
258 | ||
259 | return sprintf(buf, "%s %s\n", diodes, resistors); | |
260 | } | |
261 | ||
262 | static DEVICE_ATTR(trickle_charger, S_IRUGO, ds1343_show_tricklecharger, NULL); | |
263 | ||
264 | static int ds1343_sysfs_register(struct device *dev) | |
265 | { | |
10b06b87 | 266 | struct ds1343_priv *priv = dev_get_drvdata(dev); |
1d6316f5 RG |
267 | int err; |
268 | ||
269 | err = device_create_file(dev, &dev_attr_glitch_filter); | |
270 | if (err) | |
271 | return err; | |
272 | ||
10b06b87 | 273 | err = device_create_file(dev, &dev_attr_trickle_charger); |
1d6316f5 RG |
274 | if (err) |
275 | goto error1; | |
276 | ||
10b06b87 RG |
277 | if (priv->irq <= 0) |
278 | return err; | |
279 | ||
1d6316f5 RG |
280 | err = device_create_file(dev, &dev_attr_alarm_mode); |
281 | if (err) | |
282 | goto error2; | |
283 | ||
10b06b87 | 284 | err = device_create_file(dev, &dev_attr_alarm_status); |
1d6316f5 RG |
285 | if (!err) |
286 | return err; | |
287 | ||
288 | device_remove_file(dev, &dev_attr_alarm_mode); | |
289 | ||
290 | error2: | |
10b06b87 | 291 | device_remove_file(dev, &dev_attr_trickle_charger); |
1d6316f5 RG |
292 | |
293 | error1: | |
294 | device_remove_file(dev, &dev_attr_glitch_filter); | |
295 | ||
296 | return err; | |
297 | } | |
298 | ||
299 | static void ds1343_sysfs_unregister(struct device *dev) | |
300 | { | |
10b06b87 RG |
301 | struct ds1343_priv *priv = dev_get_drvdata(dev); |
302 | ||
1d6316f5 | 303 | device_remove_file(dev, &dev_attr_glitch_filter); |
10b06b87 RG |
304 | device_remove_file(dev, &dev_attr_trickle_charger); |
305 | ||
306 | if (priv->irq <= 0) | |
307 | return; | |
308 | ||
1d6316f5 RG |
309 | device_remove_file(dev, &dev_attr_alarm_status); |
310 | device_remove_file(dev, &dev_attr_alarm_mode); | |
1d6316f5 RG |
311 | } |
312 | ||
313 | static int ds1343_read_time(struct device *dev, struct rtc_time *dt) | |
314 | { | |
315 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
316 | unsigned char buf[7]; | |
317 | int res; | |
318 | ||
319 | res = regmap_bulk_read(priv->map, DS1343_SECONDS_REG, buf, 7); | |
320 | if (res) | |
321 | return res; | |
322 | ||
323 | dt->tm_sec = bcd2bin(buf[0]); | |
324 | dt->tm_min = bcd2bin(buf[1]); | |
325 | dt->tm_hour = bcd2bin(buf[2] & 0x3F); | |
326 | dt->tm_wday = bcd2bin(buf[3]) - 1; | |
327 | dt->tm_mday = bcd2bin(buf[4]); | |
328 | dt->tm_mon = bcd2bin(buf[5] & 0x1F) - 1; | |
329 | dt->tm_year = bcd2bin(buf[6]) + 100; /* year offset from 1900 */ | |
330 | ||
331 | return rtc_valid_tm(dt); | |
332 | } | |
333 | ||
334 | static int ds1343_set_time(struct device *dev, struct rtc_time *dt) | |
335 | { | |
336 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
337 | int res; | |
338 | ||
339 | res = regmap_write(priv->map, DS1343_SECONDS_REG, | |
340 | bin2bcd(dt->tm_sec)); | |
341 | if (res) | |
342 | return res; | |
343 | ||
344 | res = regmap_write(priv->map, DS1343_MINUTES_REG, | |
345 | bin2bcd(dt->tm_min)); | |
346 | if (res) | |
347 | return res; | |
348 | ||
349 | res = regmap_write(priv->map, DS1343_HOURS_REG, | |
350 | bin2bcd(dt->tm_hour) & 0x3F); | |
351 | if (res) | |
352 | return res; | |
353 | ||
354 | res = regmap_write(priv->map, DS1343_DAY_REG, | |
355 | bin2bcd(dt->tm_wday + 1)); | |
356 | if (res) | |
357 | return res; | |
358 | ||
359 | res = regmap_write(priv->map, DS1343_DATE_REG, | |
360 | bin2bcd(dt->tm_mday)); | |
361 | if (res) | |
362 | return res; | |
363 | ||
364 | res = regmap_write(priv->map, DS1343_MONTH_REG, | |
365 | bin2bcd(dt->tm_mon + 1)); | |
366 | if (res) | |
367 | return res; | |
368 | ||
369 | dt->tm_year %= 100; | |
370 | ||
371 | res = regmap_write(priv->map, DS1343_YEAR_REG, | |
372 | bin2bcd(dt->tm_year)); | |
373 | if (res) | |
374 | return res; | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
379 | static int ds1343_update_alarm(struct device *dev) | |
380 | { | |
381 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
382 | unsigned int control, stat; | |
383 | unsigned char buf[4]; | |
384 | int res = 0; | |
385 | ||
386 | res = regmap_read(priv->map, DS1343_CONTROL_REG, &control); | |
387 | if (res) | |
388 | return res; | |
389 | ||
390 | res = regmap_read(priv->map, DS1343_STATUS_REG, &stat); | |
391 | if (res) | |
392 | return res; | |
393 | ||
394 | control &= ~(DS1343_A0IE); | |
395 | stat &= ~(DS1343_IRQF0); | |
396 | ||
397 | res = regmap_write(priv->map, DS1343_CONTROL_REG, control); | |
398 | if (res) | |
399 | return res; | |
400 | ||
401 | res = regmap_write(priv->map, DS1343_STATUS_REG, stat); | |
402 | if (res) | |
403 | return res; | |
404 | ||
405 | buf[0] = priv->alarm_sec < 0 || (priv->irqen & RTC_UF) ? | |
406 | 0x80 : bin2bcd(priv->alarm_sec) & 0x7F; | |
407 | buf[1] = priv->alarm_min < 0 || (priv->irqen & RTC_UF) ? | |
408 | 0x80 : bin2bcd(priv->alarm_min) & 0x7F; | |
409 | buf[2] = priv->alarm_hour < 0 || (priv->irqen & RTC_UF) ? | |
410 | 0x80 : bin2bcd(priv->alarm_hour) & 0x3F; | |
411 | buf[3] = priv->alarm_mday < 0 || (priv->irqen & RTC_UF) ? | |
412 | 0x80 : bin2bcd(priv->alarm_mday) & 0x7F; | |
413 | ||
414 | res = regmap_bulk_write(priv->map, DS1343_ALM0_SEC_REG, buf, 4); | |
415 | if (res) | |
416 | return res; | |
417 | ||
418 | if (priv->irqen) { | |
419 | control |= DS1343_A0IE; | |
420 | res = regmap_write(priv->map, DS1343_CONTROL_REG, control); | |
421 | } | |
422 | ||
423 | return res; | |
424 | } | |
425 | ||
426 | static int ds1343_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) | |
427 | { | |
428 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
1d6316f5 RG |
429 | int res = 0; |
430 | unsigned int stat; | |
431 | ||
10b06b87 | 432 | if (priv->irq <= 0) |
1d6316f5 RG |
433 | return -EINVAL; |
434 | ||
435 | mutex_lock(&priv->mutex); | |
436 | ||
437 | res = regmap_read(priv->map, DS1343_STATUS_REG, &stat); | |
438 | if (res) | |
439 | goto out; | |
440 | ||
441 | alarm->enabled = !!(priv->irqen & RTC_AF); | |
442 | alarm->pending = !!(stat & DS1343_IRQF0); | |
443 | ||
444 | alarm->time.tm_sec = priv->alarm_sec < 0 ? 0 : priv->alarm_sec; | |
445 | alarm->time.tm_min = priv->alarm_min < 0 ? 0 : priv->alarm_min; | |
446 | alarm->time.tm_hour = priv->alarm_hour < 0 ? 0 : priv->alarm_hour; | |
447 | alarm->time.tm_mday = priv->alarm_mday < 0 ? 0 : priv->alarm_mday; | |
448 | ||
449 | alarm->time.tm_mon = -1; | |
450 | alarm->time.tm_year = -1; | |
451 | alarm->time.tm_wday = -1; | |
452 | alarm->time.tm_yday = -1; | |
453 | alarm->time.tm_isdst = -1; | |
454 | ||
455 | out: | |
456 | mutex_unlock(&priv->mutex); | |
457 | return res; | |
458 | } | |
459 | ||
460 | static int ds1343_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) | |
461 | { | |
462 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
1d6316f5 RG |
463 | int res = 0; |
464 | ||
10b06b87 | 465 | if (priv->irq <= 0) |
1d6316f5 RG |
466 | return -EINVAL; |
467 | ||
468 | mutex_lock(&priv->mutex); | |
469 | ||
470 | priv->alarm_sec = alarm->time.tm_sec; | |
471 | priv->alarm_min = alarm->time.tm_min; | |
472 | priv->alarm_hour = alarm->time.tm_hour; | |
473 | priv->alarm_mday = alarm->time.tm_mday; | |
474 | ||
475 | if (alarm->enabled) | |
476 | priv->irqen |= RTC_AF; | |
477 | ||
478 | res = ds1343_update_alarm(dev); | |
479 | ||
480 | mutex_unlock(&priv->mutex); | |
481 | ||
482 | return res; | |
483 | } | |
484 | ||
485 | static int ds1343_alarm_irq_enable(struct device *dev, unsigned int enabled) | |
486 | { | |
487 | struct ds1343_priv *priv = dev_get_drvdata(dev); | |
1d6316f5 RG |
488 | int res = 0; |
489 | ||
10b06b87 | 490 | if (priv->irq <= 0) |
1d6316f5 RG |
491 | return -EINVAL; |
492 | ||
493 | mutex_lock(&priv->mutex); | |
494 | ||
495 | if (enabled) | |
496 | priv->irqen |= RTC_AF; | |
497 | else | |
498 | priv->irqen &= ~RTC_AF; | |
499 | ||
500 | res = ds1343_update_alarm(dev); | |
501 | ||
502 | mutex_unlock(&priv->mutex); | |
503 | ||
504 | return res; | |
505 | } | |
506 | ||
507 | static irqreturn_t ds1343_thread(int irq, void *dev_id) | |
508 | { | |
509 | struct ds1343_priv *priv = dev_id; | |
510 | unsigned int stat, control; | |
511 | int res = 0; | |
512 | ||
513 | mutex_lock(&priv->mutex); | |
514 | ||
515 | res = regmap_read(priv->map, DS1343_STATUS_REG, &stat); | |
516 | if (res) | |
517 | goto out; | |
518 | ||
519 | if (stat & DS1343_IRQF0) { | |
520 | stat &= ~DS1343_IRQF0; | |
521 | regmap_write(priv->map, DS1343_STATUS_REG, stat); | |
522 | ||
523 | res = regmap_read(priv->map, DS1343_CONTROL_REG, &control); | |
524 | if (res) | |
525 | goto out; | |
526 | ||
527 | control &= ~DS1343_A0IE; | |
528 | regmap_write(priv->map, DS1343_CONTROL_REG, control); | |
529 | ||
530 | rtc_update_irq(priv->rtc, 1, RTC_AF | RTC_IRQF); | |
531 | } | |
532 | ||
533 | out: | |
534 | mutex_unlock(&priv->mutex); | |
535 | return IRQ_HANDLED; | |
536 | } | |
537 | ||
538 | static const struct rtc_class_ops ds1343_rtc_ops = { | |
539 | .ioctl = ds1343_ioctl, | |
540 | .read_time = ds1343_read_time, | |
541 | .set_time = ds1343_set_time, | |
542 | .read_alarm = ds1343_read_alarm, | |
543 | .set_alarm = ds1343_set_alarm, | |
544 | .alarm_irq_enable = ds1343_alarm_irq_enable, | |
545 | }; | |
546 | ||
547 | static int ds1343_probe(struct spi_device *spi) | |
548 | { | |
549 | struct ds1343_priv *priv; | |
550 | struct regmap_config config; | |
551 | unsigned int data; | |
552 | int res; | |
553 | ||
554 | memset(&config, 0, sizeof(config)); | |
555 | config.reg_bits = 8; | |
556 | config.val_bits = 8; | |
557 | config.write_flag_mask = 0x80; | |
558 | ||
559 | priv = devm_kzalloc(&spi->dev, sizeof(struct ds1343_priv), GFP_KERNEL); | |
560 | if (!priv) | |
561 | return -ENOMEM; | |
562 | ||
563 | priv->spi = spi; | |
564 | mutex_init(&priv->mutex); | |
565 | ||
566 | /* RTC DS1347 works in spi mode 3 and | |
567 | * its chip select is active high | |
568 | */ | |
569 | spi->mode = SPI_MODE_3 | SPI_CS_HIGH; | |
570 | spi->bits_per_word = 8; | |
571 | res = spi_setup(spi); | |
572 | if (res) | |
573 | return res; | |
574 | ||
575 | spi_set_drvdata(spi, priv); | |
576 | ||
577 | priv->map = devm_regmap_init_spi(spi, &config); | |
578 | ||
579 | if (IS_ERR(priv->map)) { | |
580 | dev_err(&spi->dev, "spi regmap init failed for rtc ds1343\n"); | |
581 | return PTR_ERR(priv->map); | |
582 | } | |
583 | ||
584 | res = regmap_read(priv->map, DS1343_SECONDS_REG, &data); | |
585 | if (res) | |
586 | return res; | |
587 | ||
588 | regmap_read(priv->map, DS1343_CONTROL_REG, &data); | |
589 | data |= DS1343_INTCN; | |
590 | data &= ~(DS1343_EOSC | DS1343_A1IE | DS1343_A0IE); | |
591 | regmap_write(priv->map, DS1343_CONTROL_REG, data); | |
592 | ||
593 | regmap_read(priv->map, DS1343_STATUS_REG, &data); | |
594 | data &= ~(DS1343_OSF | DS1343_IRQF1 | DS1343_IRQF0); | |
595 | regmap_write(priv->map, DS1343_STATUS_REG, data); | |
596 | ||
597 | priv->rtc = devm_rtc_device_register(&spi->dev, "ds1343", | |
598 | &ds1343_rtc_ops, THIS_MODULE); | |
599 | if (IS_ERR(priv->rtc)) { | |
600 | dev_err(&spi->dev, "unable to register rtc ds1343\n"); | |
601 | return PTR_ERR(priv->rtc); | |
602 | } | |
603 | ||
10b06b87 RG |
604 | priv->irq = spi->irq; |
605 | ||
606 | if (priv->irq >= 0) { | |
1d6316f5 RG |
607 | res = devm_request_threaded_irq(&spi->dev, spi->irq, NULL, |
608 | ds1343_thread, | |
609 | IRQF_NO_SUSPEND | IRQF_ONESHOT, | |
610 | "ds1343", priv); | |
611 | if (res) { | |
10b06b87 | 612 | priv->irq = -1; |
1d6316f5 RG |
613 | dev_err(&spi->dev, |
614 | "unable to request irq for rtc ds1343\n"); | |
10b06b87 RG |
615 | } else { |
616 | device_set_wakeup_capable(&spi->dev, 1); | |
1d6316f5 | 617 | } |
1d6316f5 RG |
618 | } |
619 | ||
620 | res = ds1343_sysfs_register(&spi->dev); | |
621 | if (res) | |
622 | dev_err(&spi->dev, | |
623 | "unable to create sysfs entries for rtc ds1343\n"); | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
628 | static int ds1343_remove(struct spi_device *spi) | |
629 | { | |
630 | struct ds1343_priv *priv = spi_get_drvdata(spi); | |
631 | ||
632 | if (spi->irq) { | |
633 | mutex_lock(&priv->mutex); | |
634 | priv->irqen &= ~RTC_AF; | |
635 | mutex_unlock(&priv->mutex); | |
636 | ||
637 | devm_free_irq(&spi->dev, spi->irq, priv); | |
638 | } | |
639 | ||
640 | spi_set_drvdata(spi, NULL); | |
641 | ||
642 | ds1343_sysfs_unregister(&spi->dev); | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
647 | #ifdef CONFIG_PM_SLEEP | |
648 | ||
649 | static int ds1343_suspend(struct device *dev) | |
650 | { | |
651 | struct spi_device *spi = to_spi_device(dev); | |
652 | ||
653 | if (spi->irq >= 0 && device_may_wakeup(dev)) | |
654 | enable_irq_wake(spi->irq); | |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
659 | static int ds1343_resume(struct device *dev) | |
660 | { | |
661 | struct spi_device *spi = to_spi_device(dev); | |
662 | ||
663 | if (spi->irq >= 0 && device_may_wakeup(dev)) | |
664 | disable_irq_wake(spi->irq); | |
665 | ||
666 | return 0; | |
667 | } | |
668 | ||
669 | #endif | |
670 | ||
671 | static SIMPLE_DEV_PM_OPS(ds1343_pm, ds1343_suspend, ds1343_resume); | |
672 | ||
673 | static struct spi_driver ds1343_driver = { | |
674 | .driver = { | |
675 | .name = "ds1343", | |
676 | .owner = THIS_MODULE, | |
677 | .pm = &ds1343_pm, | |
678 | }, | |
679 | .probe = ds1343_probe, | |
680 | .remove = ds1343_remove, | |
681 | .id_table = ds1343_id, | |
682 | }; | |
683 | ||
684 | module_spi_driver(ds1343_driver); | |
685 | ||
686 | MODULE_DESCRIPTION("DS1343 RTC SPI Driver"); | |
687 | MODULE_AUTHOR("Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>"); | |
688 | MODULE_LICENSE("GPL v2"); | |
689 | MODULE_VERSION(DS1343_DRV_VERSION); |