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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> |
93a6f916 | 21 | #include <linux/pm_wakeirq.h> |
0af62f4d | 22 | |
47c16975 MW |
23 | #define AB8500_RTC_SOFF_STAT_REG 0x00 |
24 | #define AB8500_RTC_CC_CONF_REG 0x01 | |
25 | #define AB8500_RTC_READ_REQ_REG 0x02 | |
26 | #define AB8500_RTC_WATCH_TSECMID_REG 0x03 | |
27 | #define AB8500_RTC_WATCH_TSECHI_REG 0x04 | |
28 | #define AB8500_RTC_WATCH_TMIN_LOW_REG 0x05 | |
29 | #define AB8500_RTC_WATCH_TMIN_MID_REG 0x06 | |
30 | #define AB8500_RTC_WATCH_TMIN_HI_REG 0x07 | |
31 | #define AB8500_RTC_ALRM_MIN_LOW_REG 0x08 | |
32 | #define AB8500_RTC_ALRM_MIN_MID_REG 0x09 | |
33 | #define AB8500_RTC_ALRM_MIN_HI_REG 0x0A | |
34 | #define AB8500_RTC_STAT_REG 0x0B | |
35 | #define AB8500_RTC_BKUP_CHG_REG 0x0C | |
36 | #define AB8500_RTC_FORCE_BKUP_REG 0x0D | |
37 | #define AB8500_RTC_CALIB_REG 0x0E | |
38 | #define AB8500_RTC_SWITCH_STAT_REG 0x0F | |
25d053cf AT |
39 | #define AB8540_RTC_ALRM_SEC 0x22 |
40 | #define AB8540_RTC_ALRM_MIN_LOW_REG 0x23 | |
41 | #define AB8540_RTC_ALRM_MIN_MID_REG 0x24 | |
42 | #define AB8540_RTC_ALRM_MIN_HI_REG 0x25 | |
0af62f4d VS |
43 | |
44 | /* RtcReadRequest bits */ | |
45 | #define RTC_READ_REQUEST 0x01 | |
46 | #define RTC_WRITE_REQUEST 0x02 | |
47 | ||
48 | /* RtcCtrl bits */ | |
49 | #define RTC_ALARM_ENA 0x04 | |
50 | #define RTC_STATUS_DATA 0x01 | |
51 | ||
52 | #define COUNTS_PER_SEC (0xF000 / 60) | |
53 | #define AB8500_RTC_EPOCH 2000 | |
54 | ||
47c16975 | 55 | static const u8 ab8500_rtc_time_regs[] = { |
0af62f4d VS |
56 | AB8500_RTC_WATCH_TMIN_HI_REG, AB8500_RTC_WATCH_TMIN_MID_REG, |
57 | AB8500_RTC_WATCH_TMIN_LOW_REG, AB8500_RTC_WATCH_TSECHI_REG, | |
58 | AB8500_RTC_WATCH_TSECMID_REG | |
59 | }; | |
60 | ||
47c16975 | 61 | static const u8 ab8500_rtc_alarm_regs[] = { |
0af62f4d VS |
62 | AB8500_RTC_ALRM_MIN_HI_REG, AB8500_RTC_ALRM_MIN_MID_REG, |
63 | AB8500_RTC_ALRM_MIN_LOW_REG | |
64 | }; | |
65 | ||
25d053cf AT |
66 | static const u8 ab8540_rtc_alarm_regs[] = { |
67 | AB8540_RTC_ALRM_MIN_HI_REG, AB8540_RTC_ALRM_MIN_MID_REG, | |
68 | AB8540_RTC_ALRM_MIN_LOW_REG, AB8540_RTC_ALRM_SEC | |
69 | }; | |
70 | ||
0af62f4d VS |
71 | /* Calculate the seconds from 1970 to 01-01-2000 00:00:00 */ |
72 | static unsigned long get_elapsed_seconds(int year) | |
73 | { | |
74 | unsigned long secs; | |
75 | struct rtc_time tm = { | |
76 | .tm_year = year - 1900, | |
77 | .tm_mday = 1, | |
78 | }; | |
79 | ||
80 | /* | |
81 | * This function calculates secs from 1970 and not from | |
82 | * 1900, even if we supply the offset from year 1900. | |
83 | */ | |
84 | rtc_tm_to_time(&tm, &secs); | |
85 | return secs; | |
86 | } | |
87 | ||
88 | static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm) | |
89 | { | |
0af62f4d VS |
90 | unsigned long timeout = jiffies + HZ; |
91 | int retval, i; | |
92 | unsigned long mins, secs; | |
93 | unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)]; | |
47c16975 | 94 | u8 value; |
0af62f4d VS |
95 | |
96 | /* Request a data read */ | |
47c16975 MW |
97 | retval = abx500_set_register_interruptible(dev, |
98 | AB8500_RTC, AB8500_RTC_READ_REQ_REG, RTC_READ_REQUEST); | |
0af62f4d VS |
99 | if (retval < 0) |
100 | return retval; | |
101 | ||
064407f1 BJ |
102 | /* Wait for some cycles after enabling the rtc read in ab8500 */ |
103 | while (time_before(jiffies, timeout)) { | |
104 | retval = abx500_get_register_interruptible(dev, | |
105 | AB8500_RTC, AB8500_RTC_READ_REQ_REG, &value); | |
106 | if (retval < 0) | |
107 | return retval; | |
108 | ||
109 | if (!(value & RTC_READ_REQUEST)) | |
110 | break; | |
111 | ||
112 | usleep_range(1000, 5000); | |
0af62f4d VS |
113 | } |
114 | ||
115 | /* Read the Watchtime registers */ | |
116 | for (i = 0; i < ARRAY_SIZE(ab8500_rtc_time_regs); i++) { | |
47c16975 MW |
117 | retval = abx500_get_register_interruptible(dev, |
118 | AB8500_RTC, ab8500_rtc_time_regs[i], &value); | |
0af62f4d VS |
119 | if (retval < 0) |
120 | return retval; | |
47c16975 | 121 | buf[i] = value; |
0af62f4d VS |
122 | } |
123 | ||
124 | mins = (buf[0] << 16) | (buf[1] << 8) | buf[2]; | |
125 | ||
126 | secs = (buf[3] << 8) | buf[4]; | |
127 | secs = secs / COUNTS_PER_SEC; | |
128 | secs = secs + (mins * 60); | |
129 | ||
130 | /* Add back the initially subtracted number of seconds */ | |
131 | secs += get_elapsed_seconds(AB8500_RTC_EPOCH); | |
132 | ||
133 | rtc_time_to_tm(secs, tm); | |
134 | return rtc_valid_tm(tm); | |
135 | } | |
136 | ||
137 | static int ab8500_rtc_set_time(struct device *dev, struct rtc_time *tm) | |
138 | { | |
0af62f4d VS |
139 | int retval, i; |
140 | unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)]; | |
141 | unsigned long no_secs, no_mins, secs = 0; | |
142 | ||
143 | if (tm->tm_year < (AB8500_RTC_EPOCH - 1900)) { | |
144 | dev_dbg(dev, "year should be equal to or greater than %d\n", | |
145 | AB8500_RTC_EPOCH); | |
146 | return -EINVAL; | |
147 | } | |
148 | ||
149 | /* Get the number of seconds since 1970 */ | |
150 | rtc_tm_to_time(tm, &secs); | |
151 | ||
152 | /* | |
153 | * Convert it to the number of seconds since 01-01-2000 00:00:00, since | |
154 | * we only have a small counter in the RTC. | |
155 | */ | |
156 | secs -= get_elapsed_seconds(AB8500_RTC_EPOCH); | |
157 | ||
158 | no_mins = secs / 60; | |
159 | ||
160 | no_secs = secs % 60; | |
161 | /* Make the seconds count as per the RTC resolution */ | |
162 | no_secs = no_secs * COUNTS_PER_SEC; | |
163 | ||
164 | buf[4] = no_secs & 0xFF; | |
165 | buf[3] = (no_secs >> 8) & 0xFF; | |
166 | ||
167 | buf[2] = no_mins & 0xFF; | |
168 | buf[1] = (no_mins >> 8) & 0xFF; | |
169 | buf[0] = (no_mins >> 16) & 0xFF; | |
170 | ||
171 | for (i = 0; i < ARRAY_SIZE(ab8500_rtc_time_regs); i++) { | |
47c16975 MW |
172 | retval = abx500_set_register_interruptible(dev, AB8500_RTC, |
173 | ab8500_rtc_time_regs[i], buf[i]); | |
0af62f4d VS |
174 | if (retval < 0) |
175 | return retval; | |
176 | } | |
177 | ||
178 | /* Request a data write */ | |
47c16975 MW |
179 | return abx500_set_register_interruptible(dev, AB8500_RTC, |
180 | AB8500_RTC_READ_REQ_REG, RTC_WRITE_REQUEST); | |
0af62f4d VS |
181 | } |
182 | ||
183 | static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) | |
184 | { | |
0af62f4d | 185 | int retval, i; |
47c16975 | 186 | u8 rtc_ctrl, value; |
0af62f4d VS |
187 | unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)]; |
188 | unsigned long secs, mins; | |
189 | ||
190 | /* Check if the alarm is enabled or not */ | |
47c16975 MW |
191 | retval = abx500_get_register_interruptible(dev, AB8500_RTC, |
192 | AB8500_RTC_STAT_REG, &rtc_ctrl); | |
193 | if (retval < 0) | |
194 | return retval; | |
0af62f4d VS |
195 | |
196 | if (rtc_ctrl & RTC_ALARM_ENA) | |
197 | alarm->enabled = 1; | |
198 | else | |
199 | alarm->enabled = 0; | |
200 | ||
201 | alarm->pending = 0; | |
202 | ||
203 | for (i = 0; i < ARRAY_SIZE(ab8500_rtc_alarm_regs); i++) { | |
47c16975 MW |
204 | retval = abx500_get_register_interruptible(dev, AB8500_RTC, |
205 | ab8500_rtc_alarm_regs[i], &value); | |
0af62f4d VS |
206 | if (retval < 0) |
207 | return retval; | |
47c16975 | 208 | buf[i] = value; |
0af62f4d VS |
209 | } |
210 | ||
211 | mins = (buf[0] << 16) | (buf[1] << 8) | (buf[2]); | |
212 | secs = mins * 60; | |
213 | ||
214 | /* Add back the initially subtracted number of seconds */ | |
215 | secs += get_elapsed_seconds(AB8500_RTC_EPOCH); | |
216 | ||
217 | rtc_time_to_tm(secs, &alarm->time); | |
218 | ||
219 | return rtc_valid_tm(&alarm->time); | |
220 | } | |
221 | ||
222 | static int ab8500_rtc_irq_enable(struct device *dev, unsigned int enabled) | |
223 | { | |
47c16975 MW |
224 | return abx500_mask_and_set_register_interruptible(dev, AB8500_RTC, |
225 | AB8500_RTC_STAT_REG, RTC_ALARM_ENA, | |
226 | enabled ? RTC_ALARM_ENA : 0); | |
0af62f4d VS |
227 | } |
228 | ||
229 | static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) | |
230 | { | |
0af62f4d VS |
231 | int retval, i; |
232 | unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)]; | |
dc43d4a2 RC |
233 | unsigned long mins, secs = 0, cursec = 0; |
234 | struct rtc_time curtm; | |
0af62f4d VS |
235 | |
236 | if (alarm->time.tm_year < (AB8500_RTC_EPOCH - 1900)) { | |
237 | dev_dbg(dev, "year should be equal to or greater than %d\n", | |
238 | AB8500_RTC_EPOCH); | |
239 | return -EINVAL; | |
240 | } | |
241 | ||
242 | /* Get the number of seconds since 1970 */ | |
243 | rtc_tm_to_time(&alarm->time, &secs); | |
244 | ||
dc43d4a2 RC |
245 | /* |
246 | * Check whether alarm is set less than 1min. | |
247 | * Since our RTC doesn't support alarm resolution less than 1min, | |
248 | * return -EINVAL, so UIE EMUL can take it up, incase of UIE_ON | |
249 | */ | |
250 | ab8500_rtc_read_time(dev, &curtm); /* Read current time */ | |
251 | rtc_tm_to_time(&curtm, &cursec); | |
252 | if ((secs - cursec) < 59) { | |
253 | dev_dbg(dev, "Alarm less than 1 minute not supported\r\n"); | |
254 | return -EINVAL; | |
255 | } | |
256 | ||
0af62f4d VS |
257 | /* |
258 | * Convert it to the number of seconds since 01-01-2000 00:00:00, since | |
259 | * we only have a small counter in the RTC. | |
260 | */ | |
261 | secs -= get_elapsed_seconds(AB8500_RTC_EPOCH); | |
262 | ||
263 | mins = secs / 60; | |
264 | ||
265 | buf[2] = mins & 0xFF; | |
266 | buf[1] = (mins >> 8) & 0xFF; | |
267 | buf[0] = (mins >> 16) & 0xFF; | |
268 | ||
269 | /* Set the alarm time */ | |
270 | for (i = 0; i < ARRAY_SIZE(ab8500_rtc_alarm_regs); i++) { | |
47c16975 MW |
271 | retval = abx500_set_register_interruptible(dev, AB8500_RTC, |
272 | ab8500_rtc_alarm_regs[i], buf[i]); | |
0af62f4d VS |
273 | if (retval < 0) |
274 | return retval; | |
275 | } | |
276 | ||
277 | return ab8500_rtc_irq_enable(dev, alarm->enabled); | |
278 | } | |
279 | ||
25d053cf AT |
280 | static int ab8540_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) |
281 | { | |
282 | int retval, i; | |
283 | unsigned char buf[ARRAY_SIZE(ab8540_rtc_alarm_regs)]; | |
284 | unsigned long mins, secs = 0; | |
285 | ||
286 | if (alarm->time.tm_year < (AB8500_RTC_EPOCH - 1900)) { | |
287 | dev_dbg(dev, "year should be equal to or greater than %d\n", | |
288 | AB8500_RTC_EPOCH); | |
289 | return -EINVAL; | |
290 | } | |
291 | ||
292 | /* Get the number of seconds since 1970 */ | |
293 | rtc_tm_to_time(&alarm->time, &secs); | |
294 | ||
295 | /* | |
296 | * Convert it to the number of seconds since 01-01-2000 00:00:00 | |
297 | */ | |
298 | secs -= get_elapsed_seconds(AB8500_RTC_EPOCH); | |
299 | mins = secs / 60; | |
300 | ||
301 | buf[3] = secs % 60; | |
302 | buf[2] = mins & 0xFF; | |
303 | buf[1] = (mins >> 8) & 0xFF; | |
304 | buf[0] = (mins >> 16) & 0xFF; | |
305 | ||
306 | /* Set the alarm time */ | |
307 | for (i = 0; i < ARRAY_SIZE(ab8540_rtc_alarm_regs); i++) { | |
308 | retval = abx500_set_register_interruptible(dev, AB8500_RTC, | |
309 | ab8540_rtc_alarm_regs[i], buf[i]); | |
310 | if (retval < 0) | |
311 | return retval; | |
312 | } | |
313 | ||
314 | return ab8500_rtc_irq_enable(dev, alarm->enabled); | |
315 | } | |
dda367ac MG |
316 | |
317 | static int ab8500_rtc_set_calibration(struct device *dev, int calibration) | |
318 | { | |
319 | int retval; | |
320 | u8 rtccal = 0; | |
321 | ||
322 | /* | |
323 | * Check that the calibration value (which is in units of 0.5 | |
324 | * parts-per-million) is in the AB8500's range for RtcCalibration | |
325 | * register. -128 (0x80) is not permitted because the AB8500 uses | |
326 | * a sign-bit rather than two's complement, so 0x80 is just another | |
327 | * representation of zero. | |
328 | */ | |
329 | if ((calibration < -127) || (calibration > 127)) { | |
330 | dev_err(dev, "RtcCalibration value outside permitted range\n"); | |
331 | return -EINVAL; | |
332 | } | |
333 | ||
334 | /* | |
335 | * The AB8500 uses sign (in bit7) and magnitude (in bits0-7) | |
336 | * so need to convert to this sort of representation before writing | |
337 | * into RtcCalibration register... | |
338 | */ | |
339 | if (calibration >= 0) | |
340 | rtccal = 0x7F & calibration; | |
341 | else | |
342 | rtccal = ~(calibration - 1) | 0x80; | |
343 | ||
344 | retval = abx500_set_register_interruptible(dev, AB8500_RTC, | |
345 | AB8500_RTC_CALIB_REG, rtccal); | |
346 | ||
347 | return retval; | |
348 | } | |
349 | ||
350 | static int ab8500_rtc_get_calibration(struct device *dev, int *calibration) | |
351 | { | |
352 | int retval; | |
353 | u8 rtccal = 0; | |
354 | ||
355 | retval = abx500_get_register_interruptible(dev, AB8500_RTC, | |
356 | AB8500_RTC_CALIB_REG, &rtccal); | |
357 | if (retval >= 0) { | |
358 | /* | |
359 | * The AB8500 uses sign (in bit7) and magnitude (in bits0-7) | |
360 | * so need to convert value from RtcCalibration register into | |
361 | * a two's complement signed value... | |
362 | */ | |
363 | if (rtccal & 0x80) | |
364 | *calibration = 0 - (rtccal & 0x7F); | |
365 | else | |
366 | *calibration = 0x7F & rtccal; | |
367 | } | |
368 | ||
369 | return retval; | |
370 | } | |
371 | ||
372 | static ssize_t ab8500_sysfs_store_rtc_calibration(struct device *dev, | |
373 | struct device_attribute *attr, | |
374 | const char *buf, size_t count) | |
375 | { | |
376 | int retval; | |
377 | int calibration = 0; | |
378 | ||
379 | if (sscanf(buf, " %i ", &calibration) != 1) { | |
380 | dev_err(dev, "Failed to store RTC calibration attribute\n"); | |
381 | return -EINVAL; | |
382 | } | |
383 | ||
384 | retval = ab8500_rtc_set_calibration(dev, calibration); | |
385 | ||
386 | return retval ? retval : count; | |
387 | } | |
388 | ||
389 | static ssize_t ab8500_sysfs_show_rtc_calibration(struct device *dev, | |
390 | struct device_attribute *attr, char *buf) | |
391 | { | |
392 | int retval = 0; | |
393 | int calibration = 0; | |
394 | ||
395 | retval = ab8500_rtc_get_calibration(dev, &calibration); | |
396 | if (retval < 0) { | |
397 | dev_err(dev, "Failed to read RTC calibration attribute\n"); | |
398 | sprintf(buf, "0\n"); | |
399 | return retval; | |
400 | } | |
401 | ||
402 | return sprintf(buf, "%d\n", calibration); | |
403 | } | |
404 | ||
405 | static DEVICE_ATTR(rtc_calibration, S_IRUGO | S_IWUSR, | |
406 | ab8500_sysfs_show_rtc_calibration, | |
407 | ab8500_sysfs_store_rtc_calibration); | |
408 | ||
409 | static int ab8500_sysfs_rtc_register(struct device *dev) | |
410 | { | |
411 | return device_create_file(dev, &dev_attr_rtc_calibration); | |
412 | } | |
413 | ||
414 | static void ab8500_sysfs_rtc_unregister(struct device *dev) | |
415 | { | |
416 | device_remove_file(dev, &dev_attr_rtc_calibration); | |
417 | } | |
418 | ||
0af62f4d VS |
419 | static irqreturn_t rtc_alarm_handler(int irq, void *data) |
420 | { | |
421 | struct rtc_device *rtc = data; | |
422 | unsigned long events = RTC_IRQF | RTC_AF; | |
423 | ||
424 | dev_dbg(&rtc->dev, "%s\n", __func__); | |
425 | rtc_update_irq(rtc, 1, events); | |
426 | ||
427 | return IRQ_HANDLED; | |
428 | } | |
429 | ||
430 | static const struct rtc_class_ops ab8500_rtc_ops = { | |
431 | .read_time = ab8500_rtc_read_time, | |
432 | .set_time = ab8500_rtc_set_time, | |
433 | .read_alarm = ab8500_rtc_read_alarm, | |
434 | .set_alarm = ab8500_rtc_set_alarm, | |
435 | .alarm_irq_enable = ab8500_rtc_irq_enable, | |
436 | }; | |
437 | ||
25d053cf AT |
438 | static const struct rtc_class_ops ab8540_rtc_ops = { |
439 | .read_time = ab8500_rtc_read_time, | |
440 | .set_time = ab8500_rtc_set_time, | |
441 | .read_alarm = ab8500_rtc_read_alarm, | |
442 | .set_alarm = ab8540_rtc_set_alarm, | |
443 | .alarm_irq_enable = ab8500_rtc_irq_enable, | |
444 | }; | |
445 | ||
9a72f410 | 446 | static const struct platform_device_id ab85xx_rtc_ids[] = { |
25d053cf AT |
447 | { "ab8500-rtc", (kernel_ulong_t)&ab8500_rtc_ops, }, |
448 | { "ab8540-rtc", (kernel_ulong_t)&ab8540_rtc_ops, }, | |
8a67e931 | 449 | { /* sentinel */ } |
25d053cf | 450 | }; |
63074cc3 | 451 | MODULE_DEVICE_TABLE(platform, ab85xx_rtc_ids); |
25d053cf | 452 | |
5a167f45 | 453 | static int ab8500_rtc_probe(struct platform_device *pdev) |
0af62f4d | 454 | { |
25d053cf | 455 | const struct platform_device_id *platid = platform_get_device_id(pdev); |
0af62f4d VS |
456 | int err; |
457 | struct rtc_device *rtc; | |
47c16975 | 458 | u8 rtc_ctrl; |
0af62f4d VS |
459 | int irq; |
460 | ||
461 | irq = platform_get_irq_byname(pdev, "ALARM"); | |
462 | if (irq < 0) | |
463 | return irq; | |
464 | ||
465 | /* For RTC supply test */ | |
47c16975 MW |
466 | err = abx500_mask_and_set_register_interruptible(&pdev->dev, AB8500_RTC, |
467 | AB8500_RTC_STAT_REG, RTC_STATUS_DATA, RTC_STATUS_DATA); | |
0af62f4d VS |
468 | if (err < 0) |
469 | return err; | |
470 | ||
471 | /* Wait for reset by the PorRtc */ | |
012e52e1 | 472 | usleep_range(1000, 5000); |
0af62f4d | 473 | |
47c16975 MW |
474 | err = abx500_get_register_interruptible(&pdev->dev, AB8500_RTC, |
475 | AB8500_RTC_STAT_REG, &rtc_ctrl); | |
476 | if (err < 0) | |
477 | return err; | |
0af62f4d VS |
478 | |
479 | /* Check if the RTC Supply fails */ | |
480 | if (!(rtc_ctrl & RTC_STATUS_DATA)) { | |
481 | dev_err(&pdev->dev, "RTC supply failure\n"); | |
482 | return -ENODEV; | |
483 | } | |
484 | ||
b62581e6 AL |
485 | device_init_wakeup(&pdev->dev, true); |
486 | ||
fa11f7e7 | 487 | rtc = devm_rtc_device_register(&pdev->dev, "ab8500-rtc", |
25d053cf AT |
488 | (struct rtc_class_ops *)platid->driver_data, |
489 | THIS_MODULE); | |
0af62f4d VS |
490 | if (IS_ERR(rtc)) { |
491 | dev_err(&pdev->dev, "Registration failed\n"); | |
492 | err = PTR_ERR(rtc); | |
493 | return err; | |
494 | } | |
495 | ||
fa11f7e7 | 496 | err = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
93a6f916 | 497 | rtc_alarm_handler, IRQF_ONESHOT, |
fa11f7e7 JH |
498 | "ab8500-rtc", rtc); |
499 | if (err < 0) | |
0af62f4d | 500 | return err; |
0af62f4d | 501 | |
93a6f916 | 502 | dev_pm_set_wake_irq(&pdev->dev, irq); |
0af62f4d VS |
503 | platform_set_drvdata(pdev, rtc); |
504 | ||
dda367ac MG |
505 | err = ab8500_sysfs_rtc_register(&pdev->dev); |
506 | if (err) { | |
507 | dev_err(&pdev->dev, "sysfs RTC failed to register\n"); | |
508 | return err; | |
509 | } | |
510 | ||
c594d678 XP |
511 | rtc->uie_unsupported = 1; |
512 | ||
0af62f4d VS |
513 | return 0; |
514 | } | |
515 | ||
5a167f45 | 516 | static int ab8500_rtc_remove(struct platform_device *pdev) |
0af62f4d | 517 | { |
93a6f916 SH |
518 | dev_pm_clear_wake_irq(&pdev->dev); |
519 | device_init_wakeup(&pdev->dev, false); | |
dda367ac MG |
520 | ab8500_sysfs_rtc_unregister(&pdev->dev); |
521 | ||
0af62f4d VS |
522 | return 0; |
523 | } | |
524 | ||
525 | static struct platform_driver ab8500_rtc_driver = { | |
526 | .driver = { | |
527 | .name = "ab8500-rtc", | |
0af62f4d VS |
528 | }, |
529 | .probe = ab8500_rtc_probe, | |
5a167f45 | 530 | .remove = ab8500_rtc_remove, |
25d053cf | 531 | .id_table = ab85xx_rtc_ids, |
0af62f4d VS |
532 | }; |
533 | ||
0c4eae66 | 534 | module_platform_driver(ab8500_rtc_driver); |
0af62f4d | 535 | |
0af62f4d VS |
536 | MODULE_AUTHOR("Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>"); |
537 | MODULE_DESCRIPTION("AB8500 RTC Driver"); | |
538 | MODULE_LICENSE("GPL v2"); |