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0af62f4d VS |
1 | /* |
2 | * Copyright (C) ST-Ericsson SA 2010 | |
3 | * | |
4 | * License terms: GNU General Public License (GPL) version 2 | |
5 | * Author: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com> | |
6 | * | |
7 | * RTC clock driver for the RTC part of the AB8500 Power management chip. | |
8 | * Based on RTC clock driver for the AB3100 Analog Baseband Chip by | |
9 | * Linus Walleij <linus.walleij@stericsson.com> | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/rtc.h> | |
47c16975 | 17 | #include <linux/mfd/abx500.h> |
ee66e653 | 18 | #include <linux/mfd/abx500/ab8500.h> |
0af62f4d | 19 | #include <linux/delay.h> |
ad49fcbe | 20 | #include <linux/of.h> |
0af62f4d | 21 | |
47c16975 MW |
22 | #define AB8500_RTC_SOFF_STAT_REG 0x00 |
23 | #define AB8500_RTC_CC_CONF_REG 0x01 | |
24 | #define AB8500_RTC_READ_REQ_REG 0x02 | |
25 | #define AB8500_RTC_WATCH_TSECMID_REG 0x03 | |
26 | #define AB8500_RTC_WATCH_TSECHI_REG 0x04 | |
27 | #define AB8500_RTC_WATCH_TMIN_LOW_REG 0x05 | |
28 | #define AB8500_RTC_WATCH_TMIN_MID_REG 0x06 | |
29 | #define AB8500_RTC_WATCH_TMIN_HI_REG 0x07 | |
30 | #define AB8500_RTC_ALRM_MIN_LOW_REG 0x08 | |
31 | #define AB8500_RTC_ALRM_MIN_MID_REG 0x09 | |
32 | #define AB8500_RTC_ALRM_MIN_HI_REG 0x0A | |
33 | #define AB8500_RTC_STAT_REG 0x0B | |
34 | #define AB8500_RTC_BKUP_CHG_REG 0x0C | |
35 | #define AB8500_RTC_FORCE_BKUP_REG 0x0D | |
36 | #define AB8500_RTC_CALIB_REG 0x0E | |
37 | #define AB8500_RTC_SWITCH_STAT_REG 0x0F | |
25d053cf AT |
38 | #define AB8540_RTC_ALRM_SEC 0x22 |
39 | #define AB8540_RTC_ALRM_MIN_LOW_REG 0x23 | |
40 | #define AB8540_RTC_ALRM_MIN_MID_REG 0x24 | |
41 | #define AB8540_RTC_ALRM_MIN_HI_REG 0x25 | |
0af62f4d VS |
42 | |
43 | /* RtcReadRequest bits */ | |
44 | #define RTC_READ_REQUEST 0x01 | |
45 | #define RTC_WRITE_REQUEST 0x02 | |
46 | ||
47 | /* RtcCtrl bits */ | |
48 | #define RTC_ALARM_ENA 0x04 | |
49 | #define RTC_STATUS_DATA 0x01 | |
50 | ||
51 | #define COUNTS_PER_SEC (0xF000 / 60) | |
52 | #define AB8500_RTC_EPOCH 2000 | |
53 | ||
47c16975 | 54 | static const u8 ab8500_rtc_time_regs[] = { |
0af62f4d VS |
55 | AB8500_RTC_WATCH_TMIN_HI_REG, AB8500_RTC_WATCH_TMIN_MID_REG, |
56 | AB8500_RTC_WATCH_TMIN_LOW_REG, AB8500_RTC_WATCH_TSECHI_REG, | |
57 | AB8500_RTC_WATCH_TSECMID_REG | |
58 | }; | |
59 | ||
47c16975 | 60 | static const u8 ab8500_rtc_alarm_regs[] = { |
0af62f4d VS |
61 | AB8500_RTC_ALRM_MIN_HI_REG, AB8500_RTC_ALRM_MIN_MID_REG, |
62 | AB8500_RTC_ALRM_MIN_LOW_REG | |
63 | }; | |
64 | ||
25d053cf AT |
65 | static const u8 ab8540_rtc_alarm_regs[] = { |
66 | AB8540_RTC_ALRM_MIN_HI_REG, AB8540_RTC_ALRM_MIN_MID_REG, | |
67 | AB8540_RTC_ALRM_MIN_LOW_REG, AB8540_RTC_ALRM_SEC | |
68 | }; | |
69 | ||
0af62f4d VS |
70 | /* Calculate the seconds from 1970 to 01-01-2000 00:00:00 */ |
71 | static unsigned long get_elapsed_seconds(int year) | |
72 | { | |
73 | unsigned long secs; | |
74 | struct rtc_time tm = { | |
75 | .tm_year = year - 1900, | |
76 | .tm_mday = 1, | |
77 | }; | |
78 | ||
79 | /* | |
80 | * This function calculates secs from 1970 and not from | |
81 | * 1900, even if we supply the offset from year 1900. | |
82 | */ | |
83 | rtc_tm_to_time(&tm, &secs); | |
84 | return secs; | |
85 | } | |
86 | ||
87 | static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm) | |
88 | { | |
0af62f4d VS |
89 | unsigned long timeout = jiffies + HZ; |
90 | int retval, i; | |
91 | unsigned long mins, secs; | |
92 | unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)]; | |
47c16975 | 93 | u8 value; |
0af62f4d VS |
94 | |
95 | /* Request a data read */ | |
47c16975 MW |
96 | retval = abx500_set_register_interruptible(dev, |
97 | AB8500_RTC, AB8500_RTC_READ_REQ_REG, RTC_READ_REQUEST); | |
0af62f4d VS |
98 | if (retval < 0) |
99 | return retval; | |
100 | ||
064407f1 BJ |
101 | /* Wait for some cycles after enabling the rtc read in ab8500 */ |
102 | while (time_before(jiffies, timeout)) { | |
103 | retval = abx500_get_register_interruptible(dev, | |
104 | AB8500_RTC, AB8500_RTC_READ_REQ_REG, &value); | |
105 | if (retval < 0) | |
106 | return retval; | |
107 | ||
108 | if (!(value & RTC_READ_REQUEST)) | |
109 | break; | |
110 | ||
111 | usleep_range(1000, 5000); | |
0af62f4d VS |
112 | } |
113 | ||
114 | /* Read the Watchtime registers */ | |
115 | for (i = 0; i < ARRAY_SIZE(ab8500_rtc_time_regs); i++) { | |
47c16975 MW |
116 | retval = abx500_get_register_interruptible(dev, |
117 | AB8500_RTC, ab8500_rtc_time_regs[i], &value); | |
0af62f4d VS |
118 | if (retval < 0) |
119 | return retval; | |
47c16975 | 120 | buf[i] = value; |
0af62f4d VS |
121 | } |
122 | ||
123 | mins = (buf[0] << 16) | (buf[1] << 8) | buf[2]; | |
124 | ||
125 | secs = (buf[3] << 8) | buf[4]; | |
126 | secs = secs / COUNTS_PER_SEC; | |
127 | secs = secs + (mins * 60); | |
128 | ||
129 | /* Add back the initially subtracted number of seconds */ | |
130 | secs += get_elapsed_seconds(AB8500_RTC_EPOCH); | |
131 | ||
132 | rtc_time_to_tm(secs, tm); | |
133 | return rtc_valid_tm(tm); | |
134 | } | |
135 | ||
136 | static int ab8500_rtc_set_time(struct device *dev, struct rtc_time *tm) | |
137 | { | |
0af62f4d VS |
138 | int retval, i; |
139 | unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)]; | |
140 | unsigned long no_secs, no_mins, secs = 0; | |
141 | ||
142 | if (tm->tm_year < (AB8500_RTC_EPOCH - 1900)) { | |
143 | dev_dbg(dev, "year should be equal to or greater than %d\n", | |
144 | AB8500_RTC_EPOCH); | |
145 | return -EINVAL; | |
146 | } | |
147 | ||
148 | /* Get the number of seconds since 1970 */ | |
149 | rtc_tm_to_time(tm, &secs); | |
150 | ||
151 | /* | |
152 | * Convert it to the number of seconds since 01-01-2000 00:00:00, since | |
153 | * we only have a small counter in the RTC. | |
154 | */ | |
155 | secs -= get_elapsed_seconds(AB8500_RTC_EPOCH); | |
156 | ||
157 | no_mins = secs / 60; | |
158 | ||
159 | no_secs = secs % 60; | |
160 | /* Make the seconds count as per the RTC resolution */ | |
161 | no_secs = no_secs * COUNTS_PER_SEC; | |
162 | ||
163 | buf[4] = no_secs & 0xFF; | |
164 | buf[3] = (no_secs >> 8) & 0xFF; | |
165 | ||
166 | buf[2] = no_mins & 0xFF; | |
167 | buf[1] = (no_mins >> 8) & 0xFF; | |
168 | buf[0] = (no_mins >> 16) & 0xFF; | |
169 | ||
170 | for (i = 0; i < ARRAY_SIZE(ab8500_rtc_time_regs); i++) { | |
47c16975 MW |
171 | retval = abx500_set_register_interruptible(dev, AB8500_RTC, |
172 | ab8500_rtc_time_regs[i], buf[i]); | |
0af62f4d VS |
173 | if (retval < 0) |
174 | return retval; | |
175 | } | |
176 | ||
177 | /* Request a data write */ | |
47c16975 MW |
178 | return abx500_set_register_interruptible(dev, AB8500_RTC, |
179 | AB8500_RTC_READ_REQ_REG, RTC_WRITE_REQUEST); | |
0af62f4d VS |
180 | } |
181 | ||
182 | static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) | |
183 | { | |
0af62f4d | 184 | int retval, i; |
47c16975 | 185 | u8 rtc_ctrl, value; |
0af62f4d VS |
186 | unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)]; |
187 | unsigned long secs, mins; | |
188 | ||
189 | /* Check if the alarm is enabled or not */ | |
47c16975 MW |
190 | retval = abx500_get_register_interruptible(dev, AB8500_RTC, |
191 | AB8500_RTC_STAT_REG, &rtc_ctrl); | |
192 | if (retval < 0) | |
193 | return retval; | |
0af62f4d VS |
194 | |
195 | if (rtc_ctrl & RTC_ALARM_ENA) | |
196 | alarm->enabled = 1; | |
197 | else | |
198 | alarm->enabled = 0; | |
199 | ||
200 | alarm->pending = 0; | |
201 | ||
202 | for (i = 0; i < ARRAY_SIZE(ab8500_rtc_alarm_regs); i++) { | |
47c16975 MW |
203 | retval = abx500_get_register_interruptible(dev, AB8500_RTC, |
204 | ab8500_rtc_alarm_regs[i], &value); | |
0af62f4d VS |
205 | if (retval < 0) |
206 | return retval; | |
47c16975 | 207 | buf[i] = value; |
0af62f4d VS |
208 | } |
209 | ||
210 | mins = (buf[0] << 16) | (buf[1] << 8) | (buf[2]); | |
211 | secs = mins * 60; | |
212 | ||
213 | /* Add back the initially subtracted number of seconds */ | |
214 | secs += get_elapsed_seconds(AB8500_RTC_EPOCH); | |
215 | ||
216 | rtc_time_to_tm(secs, &alarm->time); | |
217 | ||
218 | return rtc_valid_tm(&alarm->time); | |
219 | } | |
220 | ||
221 | static int ab8500_rtc_irq_enable(struct device *dev, unsigned int enabled) | |
222 | { | |
47c16975 MW |
223 | return abx500_mask_and_set_register_interruptible(dev, AB8500_RTC, |
224 | AB8500_RTC_STAT_REG, RTC_ALARM_ENA, | |
225 | enabled ? RTC_ALARM_ENA : 0); | |
0af62f4d VS |
226 | } |
227 | ||
228 | static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) | |
229 | { | |
0af62f4d VS |
230 | int retval, i; |
231 | unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)]; | |
dc43d4a2 RC |
232 | unsigned long mins, secs = 0, cursec = 0; |
233 | struct rtc_time curtm; | |
0af62f4d VS |
234 | |
235 | if (alarm->time.tm_year < (AB8500_RTC_EPOCH - 1900)) { | |
236 | dev_dbg(dev, "year should be equal to or greater than %d\n", | |
237 | AB8500_RTC_EPOCH); | |
238 | return -EINVAL; | |
239 | } | |
240 | ||
241 | /* Get the number of seconds since 1970 */ | |
242 | rtc_tm_to_time(&alarm->time, &secs); | |
243 | ||
dc43d4a2 RC |
244 | /* |
245 | * Check whether alarm is set less than 1min. | |
246 | * Since our RTC doesn't support alarm resolution less than 1min, | |
247 | * return -EINVAL, so UIE EMUL can take it up, incase of UIE_ON | |
248 | */ | |
249 | ab8500_rtc_read_time(dev, &curtm); /* Read current time */ | |
250 | rtc_tm_to_time(&curtm, &cursec); | |
251 | if ((secs - cursec) < 59) { | |
252 | dev_dbg(dev, "Alarm less than 1 minute not supported\r\n"); | |
253 | return -EINVAL; | |
254 | } | |
255 | ||
0af62f4d VS |
256 | /* |
257 | * Convert it to the number of seconds since 01-01-2000 00:00:00, since | |
258 | * we only have a small counter in the RTC. | |
259 | */ | |
260 | secs -= get_elapsed_seconds(AB8500_RTC_EPOCH); | |
261 | ||
262 | mins = secs / 60; | |
263 | ||
264 | buf[2] = mins & 0xFF; | |
265 | buf[1] = (mins >> 8) & 0xFF; | |
266 | buf[0] = (mins >> 16) & 0xFF; | |
267 | ||
268 | /* Set the alarm time */ | |
269 | for (i = 0; i < ARRAY_SIZE(ab8500_rtc_alarm_regs); i++) { | |
47c16975 MW |
270 | retval = abx500_set_register_interruptible(dev, AB8500_RTC, |
271 | ab8500_rtc_alarm_regs[i], buf[i]); | |
0af62f4d VS |
272 | if (retval < 0) |
273 | return retval; | |
274 | } | |
275 | ||
276 | return ab8500_rtc_irq_enable(dev, alarm->enabled); | |
277 | } | |
278 | ||
25d053cf AT |
279 | static int ab8540_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) |
280 | { | |
281 | int retval, i; | |
282 | unsigned char buf[ARRAY_SIZE(ab8540_rtc_alarm_regs)]; | |
283 | unsigned long mins, secs = 0; | |
284 | ||
285 | if (alarm->time.tm_year < (AB8500_RTC_EPOCH - 1900)) { | |
286 | dev_dbg(dev, "year should be equal to or greater than %d\n", | |
287 | AB8500_RTC_EPOCH); | |
288 | return -EINVAL; | |
289 | } | |
290 | ||
291 | /* Get the number of seconds since 1970 */ | |
292 | rtc_tm_to_time(&alarm->time, &secs); | |
293 | ||
294 | /* | |
295 | * Convert it to the number of seconds since 01-01-2000 00:00:00 | |
296 | */ | |
297 | secs -= get_elapsed_seconds(AB8500_RTC_EPOCH); | |
298 | mins = secs / 60; | |
299 | ||
300 | buf[3] = secs % 60; | |
301 | buf[2] = mins & 0xFF; | |
302 | buf[1] = (mins >> 8) & 0xFF; | |
303 | buf[0] = (mins >> 16) & 0xFF; | |
304 | ||
305 | /* Set the alarm time */ | |
306 | for (i = 0; i < ARRAY_SIZE(ab8540_rtc_alarm_regs); i++) { | |
307 | retval = abx500_set_register_interruptible(dev, AB8500_RTC, | |
308 | ab8540_rtc_alarm_regs[i], buf[i]); | |
309 | if (retval < 0) | |
310 | return retval; | |
311 | } | |
312 | ||
313 | return ab8500_rtc_irq_enable(dev, alarm->enabled); | |
314 | } | |
dda367ac MG |
315 | |
316 | static int ab8500_rtc_set_calibration(struct device *dev, int calibration) | |
317 | { | |
318 | int retval; | |
319 | u8 rtccal = 0; | |
320 | ||
321 | /* | |
322 | * Check that the calibration value (which is in units of 0.5 | |
323 | * parts-per-million) is in the AB8500's range for RtcCalibration | |
324 | * register. -128 (0x80) is not permitted because the AB8500 uses | |
325 | * a sign-bit rather than two's complement, so 0x80 is just another | |
326 | * representation of zero. | |
327 | */ | |
328 | if ((calibration < -127) || (calibration > 127)) { | |
329 | dev_err(dev, "RtcCalibration value outside permitted range\n"); | |
330 | return -EINVAL; | |
331 | } | |
332 | ||
333 | /* | |
334 | * The AB8500 uses sign (in bit7) and magnitude (in bits0-7) | |
335 | * so need to convert to this sort of representation before writing | |
336 | * into RtcCalibration register... | |
337 | */ | |
338 | if (calibration >= 0) | |
339 | rtccal = 0x7F & calibration; | |
340 | else | |
341 | rtccal = ~(calibration - 1) | 0x80; | |
342 | ||
343 | retval = abx500_set_register_interruptible(dev, AB8500_RTC, | |
344 | AB8500_RTC_CALIB_REG, rtccal); | |
345 | ||
346 | return retval; | |
347 | } | |
348 | ||
349 | static int ab8500_rtc_get_calibration(struct device *dev, int *calibration) | |
350 | { | |
351 | int retval; | |
352 | u8 rtccal = 0; | |
353 | ||
354 | retval = abx500_get_register_interruptible(dev, AB8500_RTC, | |
355 | AB8500_RTC_CALIB_REG, &rtccal); | |
356 | if (retval >= 0) { | |
357 | /* | |
358 | * The AB8500 uses sign (in bit7) and magnitude (in bits0-7) | |
359 | * so need to convert value from RtcCalibration register into | |
360 | * a two's complement signed value... | |
361 | */ | |
362 | if (rtccal & 0x80) | |
363 | *calibration = 0 - (rtccal & 0x7F); | |
364 | else | |
365 | *calibration = 0x7F & rtccal; | |
366 | } | |
367 | ||
368 | return retval; | |
369 | } | |
370 | ||
371 | static ssize_t ab8500_sysfs_store_rtc_calibration(struct device *dev, | |
372 | struct device_attribute *attr, | |
373 | const char *buf, size_t count) | |
374 | { | |
375 | int retval; | |
376 | int calibration = 0; | |
377 | ||
378 | if (sscanf(buf, " %i ", &calibration) != 1) { | |
379 | dev_err(dev, "Failed to store RTC calibration attribute\n"); | |
380 | return -EINVAL; | |
381 | } | |
382 | ||
383 | retval = ab8500_rtc_set_calibration(dev, calibration); | |
384 | ||
385 | return retval ? retval : count; | |
386 | } | |
387 | ||
388 | static ssize_t ab8500_sysfs_show_rtc_calibration(struct device *dev, | |
389 | struct device_attribute *attr, char *buf) | |
390 | { | |
391 | int retval = 0; | |
392 | int calibration = 0; | |
393 | ||
394 | retval = ab8500_rtc_get_calibration(dev, &calibration); | |
395 | if (retval < 0) { | |
396 | dev_err(dev, "Failed to read RTC calibration attribute\n"); | |
397 | sprintf(buf, "0\n"); | |
398 | return retval; | |
399 | } | |
400 | ||
401 | return sprintf(buf, "%d\n", calibration); | |
402 | } | |
403 | ||
404 | static DEVICE_ATTR(rtc_calibration, S_IRUGO | S_IWUSR, | |
405 | ab8500_sysfs_show_rtc_calibration, | |
406 | ab8500_sysfs_store_rtc_calibration); | |
407 | ||
408 | static int ab8500_sysfs_rtc_register(struct device *dev) | |
409 | { | |
410 | return device_create_file(dev, &dev_attr_rtc_calibration); | |
411 | } | |
412 | ||
413 | static void ab8500_sysfs_rtc_unregister(struct device *dev) | |
414 | { | |
415 | device_remove_file(dev, &dev_attr_rtc_calibration); | |
416 | } | |
417 | ||
0af62f4d VS |
418 | static irqreturn_t rtc_alarm_handler(int irq, void *data) |
419 | { | |
420 | struct rtc_device *rtc = data; | |
421 | unsigned long events = RTC_IRQF | RTC_AF; | |
422 | ||
423 | dev_dbg(&rtc->dev, "%s\n", __func__); | |
424 | rtc_update_irq(rtc, 1, events); | |
425 | ||
426 | return IRQ_HANDLED; | |
427 | } | |
428 | ||
429 | static const struct rtc_class_ops ab8500_rtc_ops = { | |
430 | .read_time = ab8500_rtc_read_time, | |
431 | .set_time = ab8500_rtc_set_time, | |
432 | .read_alarm = ab8500_rtc_read_alarm, | |
433 | .set_alarm = ab8500_rtc_set_alarm, | |
434 | .alarm_irq_enable = ab8500_rtc_irq_enable, | |
435 | }; | |
436 | ||
25d053cf AT |
437 | static const struct rtc_class_ops ab8540_rtc_ops = { |
438 | .read_time = ab8500_rtc_read_time, | |
439 | .set_time = ab8500_rtc_set_time, | |
440 | .read_alarm = ab8500_rtc_read_alarm, | |
441 | .set_alarm = ab8540_rtc_set_alarm, | |
442 | .alarm_irq_enable = ab8500_rtc_irq_enable, | |
443 | }; | |
444 | ||
445 | static struct platform_device_id ab85xx_rtc_ids[] = { | |
446 | { "ab8500-rtc", (kernel_ulong_t)&ab8500_rtc_ops, }, | |
447 | { "ab8540-rtc", (kernel_ulong_t)&ab8540_rtc_ops, }, | |
448 | }; | |
449 | ||
5a167f45 | 450 | static int ab8500_rtc_probe(struct platform_device *pdev) |
0af62f4d | 451 | { |
25d053cf | 452 | const struct platform_device_id *platid = platform_get_device_id(pdev); |
0af62f4d VS |
453 | int err; |
454 | struct rtc_device *rtc; | |
47c16975 | 455 | u8 rtc_ctrl; |
0af62f4d VS |
456 | int irq; |
457 | ||
458 | irq = platform_get_irq_byname(pdev, "ALARM"); | |
459 | if (irq < 0) | |
460 | return irq; | |
461 | ||
462 | /* For RTC supply test */ | |
47c16975 MW |
463 | err = abx500_mask_and_set_register_interruptible(&pdev->dev, AB8500_RTC, |
464 | AB8500_RTC_STAT_REG, RTC_STATUS_DATA, RTC_STATUS_DATA); | |
0af62f4d VS |
465 | if (err < 0) |
466 | return err; | |
467 | ||
468 | /* Wait for reset by the PorRtc */ | |
012e52e1 | 469 | usleep_range(1000, 5000); |
0af62f4d | 470 | |
47c16975 MW |
471 | err = abx500_get_register_interruptible(&pdev->dev, AB8500_RTC, |
472 | AB8500_RTC_STAT_REG, &rtc_ctrl); | |
473 | if (err < 0) | |
474 | return err; | |
0af62f4d VS |
475 | |
476 | /* Check if the RTC Supply fails */ | |
477 | if (!(rtc_ctrl & RTC_STATUS_DATA)) { | |
478 | dev_err(&pdev->dev, "RTC supply failure\n"); | |
479 | return -ENODEV; | |
480 | } | |
481 | ||
b62581e6 AL |
482 | device_init_wakeup(&pdev->dev, true); |
483 | ||
fa11f7e7 | 484 | rtc = devm_rtc_device_register(&pdev->dev, "ab8500-rtc", |
25d053cf AT |
485 | (struct rtc_class_ops *)platid->driver_data, |
486 | THIS_MODULE); | |
0af62f4d VS |
487 | if (IS_ERR(rtc)) { |
488 | dev_err(&pdev->dev, "Registration failed\n"); | |
489 | err = PTR_ERR(rtc); | |
490 | return err; | |
491 | } | |
492 | ||
fa11f7e7 JH |
493 | err = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
494 | rtc_alarm_handler, IRQF_NO_SUSPEND | IRQF_ONESHOT, | |
495 | "ab8500-rtc", rtc); | |
496 | if (err < 0) | |
0af62f4d | 497 | return err; |
0af62f4d VS |
498 | |
499 | platform_set_drvdata(pdev, rtc); | |
500 | ||
dda367ac MG |
501 | err = ab8500_sysfs_rtc_register(&pdev->dev); |
502 | if (err) { | |
503 | dev_err(&pdev->dev, "sysfs RTC failed to register\n"); | |
504 | return err; | |
505 | } | |
506 | ||
0af62f4d VS |
507 | return 0; |
508 | } | |
509 | ||
5a167f45 | 510 | static int ab8500_rtc_remove(struct platform_device *pdev) |
0af62f4d | 511 | { |
dda367ac MG |
512 | ab8500_sysfs_rtc_unregister(&pdev->dev); |
513 | ||
0af62f4d VS |
514 | return 0; |
515 | } | |
516 | ||
517 | static struct platform_driver ab8500_rtc_driver = { | |
518 | .driver = { | |
519 | .name = "ab8500-rtc", | |
520 | .owner = THIS_MODULE, | |
521 | }, | |
522 | .probe = ab8500_rtc_probe, | |
5a167f45 | 523 | .remove = ab8500_rtc_remove, |
25d053cf | 524 | .id_table = ab85xx_rtc_ids, |
0af62f4d VS |
525 | }; |
526 | ||
0c4eae66 | 527 | module_platform_driver(ab8500_rtc_driver); |
0af62f4d | 528 | |
0af62f4d VS |
529 | MODULE_AUTHOR("Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>"); |
530 | MODULE_DESCRIPTION("AB8500 RTC Driver"); | |
531 | MODULE_LICENSE("GPL v2"); |