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 * Ankur Srivastava <sankurece@gmail.com> : DS1343 Nvram Support 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 * 13 */ 14 15 #include <linux/init.h> 16 #include <linux/module.h> 17 #include <linux/interrupt.h> 18 #include <linux/device.h> 19 #include <linux/spi/spi.h> 20 #include <linux/regmap.h> 21 #include <linux/rtc.h> 22 #include <linux/bcd.h> 23 #include <linux/pm.h> 24 #include <linux/slab.h> 25 26 #define DS1343_DRV_VERSION "01.00" 27 #define DALLAS_MAXIM_DS1343 0 28 #define DALLAS_MAXIM_DS1344 1 29 30 /* RTC DS1343 Registers */ 31 #define DS1343_SECONDS_REG 0x00 32 #define DS1343_MINUTES_REG 0x01 33 #define DS1343_HOURS_REG 0x02 34 #define DS1343_DAY_REG 0x03 35 #define DS1343_DATE_REG 0x04 36 #define DS1343_MONTH_REG 0x05 37 #define DS1343_YEAR_REG 0x06 38 #define DS1343_ALM0_SEC_REG 0x07 39 #define DS1343_ALM0_MIN_REG 0x08 40 #define DS1343_ALM0_HOUR_REG 0x09 41 #define DS1343_ALM0_DAY_REG 0x0A 42 #define DS1343_ALM1_SEC_REG 0x0B 43 #define DS1343_ALM1_MIN_REG 0x0C 44 #define DS1343_ALM1_HOUR_REG 0x0D 45 #define DS1343_ALM1_DAY_REG 0x0E 46 #define DS1343_CONTROL_REG 0x0F 47 #define DS1343_STATUS_REG 0x10 48 #define DS1343_TRICKLE_REG 0x11 49 #define DS1343_NVRAM 0x20 50 51 #define DS1343_NVRAM_LEN 96 52 53 /* DS1343 Control Registers bits */ 54 #define DS1343_EOSC 0x80 55 #define DS1343_DOSF 0x20 56 #define DS1343_EGFIL 0x10 57 #define DS1343_SQW 0x08 58 #define DS1343_INTCN 0x04 59 #define DS1343_A1IE 0x02 60 #define DS1343_A0IE 0x01 61 62 /* DS1343 Status Registers bits */ 63 #define DS1343_OSF 0x80 64 #define DS1343_IRQF1 0x02 65 #define DS1343_IRQF0 0x01 66 67 /* DS1343 Trickle Charger Registers bits */ 68 #define DS1343_TRICKLE_MAGIC 0xa0 69 #define DS1343_TRICKLE_DS1 0x08 70 #define DS1343_TRICKLE_1K 0x01 71 #define DS1343_TRICKLE_2K 0x02 72 #define DS1343_TRICKLE_4K 0x03 73 74 static const struct spi_device_id ds1343_id[] = { 75 { "ds1343", DALLAS_MAXIM_DS1343 }, 76 { "ds1344", DALLAS_MAXIM_DS1344 }, 77 { } 78 }; 79 MODULE_DEVICE_TABLE(spi, ds1343_id); 80 81 struct ds1343_priv { 82 struct spi_device *spi; 83 struct rtc_device *rtc; 84 struct regmap *map; 85 struct mutex mutex; 86 unsigned int irqen; 87 int irq; 88 int alarm_sec; 89 int alarm_min; 90 int alarm_hour; 91 int alarm_mday; 92 }; 93 94 static int ds1343_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) 95 { 96 switch (cmd) { 97 #ifdef RTC_SET_CHARGE 98 case RTC_SET_CHARGE: 99 { 100 int val; 101 102 if (copy_from_user(&val, (int __user *)arg, sizeof(int))) 103 return -EFAULT; 104 105 return regmap_write(priv->map, DS1343_TRICKLE_REG, val); 106 } 107 break; 108 #endif 109 } 110 111 return -ENOIOCTLCMD; 112 } 113 114 static ssize_t ds1343_show_glitchfilter(struct device *dev, 115 struct device_attribute *attr, char *buf) 116 { 117 struct ds1343_priv *priv = dev_get_drvdata(dev); 118 int glitch_filt_status, data; 119 120 regmap_read(priv->map, DS1343_CONTROL_REG, &data); 121 122 glitch_filt_status = !!(data & DS1343_EGFIL); 123 124 if (glitch_filt_status) 125 return sprintf(buf, "enabled\n"); 126 else 127 return sprintf(buf, "disabled\n"); 128 } 129 130 static ssize_t ds1343_store_glitchfilter(struct device *dev, 131 struct device_attribute *attr, 132 const char *buf, size_t count) 133 { 134 struct ds1343_priv *priv = dev_get_drvdata(dev); 135 int data; 136 137 regmap_read(priv->map, DS1343_CONTROL_REG, &data); 138 139 if (strncmp(buf, "enabled", 7) == 0) 140 data |= DS1343_EGFIL; 141 142 else if (strncmp(buf, "disabled", 8) == 0) 143 data &= ~(DS1343_EGFIL); 144 145 else 146 return -EINVAL; 147 148 regmap_write(priv->map, DS1343_CONTROL_REG, data); 149 150 return count; 151 } 152 153 static DEVICE_ATTR(glitch_filter, S_IRUGO | S_IWUSR, ds1343_show_glitchfilter, 154 ds1343_store_glitchfilter); 155 156 static ssize_t ds1343_nvram_write(struct file *filp, struct kobject *kobj, 157 struct bin_attribute *attr, 158 char *buf, loff_t off, size_t count) 159 { 160 int ret; 161 unsigned char address; 162 struct device *dev = kobj_to_dev(kobj); 163 struct ds1343_priv *priv = dev_get_drvdata(dev); 164 165 if (unlikely(!count)) 166 return count; 167 168 if ((count + off) > DS1343_NVRAM_LEN) 169 count = DS1343_NVRAM_LEN - off; 170 171 address = DS1343_NVRAM + off; 172 173 ret = regmap_bulk_write(priv->map, address, buf, count); 174 if (ret < 0) 175 dev_err(&priv->spi->dev, "Error in nvram write %d", ret); 176 177 return (ret < 0) ? ret : count; 178 } 179 180 181 static ssize_t ds1343_nvram_read(struct file *filp, struct kobject *kobj, 182 struct bin_attribute *attr, 183 char *buf, loff_t off, size_t count) 184 { 185 int ret; 186 unsigned char address; 187 struct device *dev = kobj_to_dev(kobj); 188 struct ds1343_priv *priv = dev_get_drvdata(dev); 189 190 if (unlikely(!count)) 191 return count; 192 193 if ((count + off) > DS1343_NVRAM_LEN) 194 count = DS1343_NVRAM_LEN - off; 195 196 address = DS1343_NVRAM + off; 197 198 ret = regmap_bulk_read(priv->map, address, buf, count); 199 if (ret < 0) 200 dev_err(&priv->spi->dev, "Error in nvram read %d\n", ret); 201 202 return (ret < 0) ? ret : count; 203 } 204 205 206 static struct bin_attribute nvram_attr = { 207 .attr.name = "nvram", 208 .attr.mode = S_IRUGO | S_IWUSR, 209 .read = ds1343_nvram_read, 210 .write = ds1343_nvram_write, 211 .size = DS1343_NVRAM_LEN, 212 }; 213 214 static ssize_t ds1343_show_alarmstatus(struct device *dev, 215 struct device_attribute *attr, char *buf) 216 { 217 struct ds1343_priv *priv = dev_get_drvdata(dev); 218 int alarmstatus, data; 219 220 regmap_read(priv->map, DS1343_CONTROL_REG, &data); 221 222 alarmstatus = !!(data & DS1343_A0IE); 223 224 if (alarmstatus) 225 return sprintf(buf, "enabled\n"); 226 else 227 return sprintf(buf, "disabled\n"); 228 } 229 230 static DEVICE_ATTR(alarm_status, S_IRUGO, ds1343_show_alarmstatus, NULL); 231 232 static ssize_t ds1343_show_alarmmode(struct device *dev, 233 struct device_attribute *attr, char *buf) 234 { 235 struct ds1343_priv *priv = dev_get_drvdata(dev); 236 int alarm_mode, data; 237 char *alarm_str; 238 239 regmap_read(priv->map, DS1343_ALM0_SEC_REG, &data); 240 alarm_mode = (data & 0x80) >> 4; 241 242 regmap_read(priv->map, DS1343_ALM0_MIN_REG, &data); 243 alarm_mode |= (data & 0x80) >> 5; 244 245 regmap_read(priv->map, DS1343_ALM0_HOUR_REG, &data); 246 alarm_mode |= (data & 0x80) >> 6; 247 248 regmap_read(priv->map, DS1343_ALM0_DAY_REG, &data); 249 alarm_mode |= (data & 0x80) >> 7; 250 251 switch (alarm_mode) { 252 case 15: 253 alarm_str = "each second"; 254 break; 255 256 case 7: 257 alarm_str = "seconds match"; 258 break; 259 260 case 3: 261 alarm_str = "minutes and seconds match"; 262 break; 263 264 case 1: 265 alarm_str = "hours, minutes and seconds match"; 266 break; 267 268 case 0: 269 alarm_str = "day, hours, minutes and seconds match"; 270 break; 271 272 default: 273 alarm_str = "invalid"; 274 break; 275 } 276 277 return sprintf(buf, "%s\n", alarm_str); 278 } 279 280 static DEVICE_ATTR(alarm_mode, S_IRUGO, ds1343_show_alarmmode, NULL); 281 282 static ssize_t ds1343_show_tricklecharger(struct device *dev, 283 struct device_attribute *attr, char *buf) 284 { 285 struct ds1343_priv *priv = dev_get_drvdata(dev); 286 int data; 287 char *diodes = "disabled", *resistors = " "; 288 289 regmap_read(priv->map, DS1343_TRICKLE_REG, &data); 290 291 if ((data & 0xf0) == DS1343_TRICKLE_MAGIC) { 292 switch (data & 0x0c) { 293 case DS1343_TRICKLE_DS1: 294 diodes = "one diode,"; 295 break; 296 297 default: 298 diodes = "no diode,"; 299 break; 300 } 301 302 switch (data & 0x03) { 303 case DS1343_TRICKLE_1K: 304 resistors = "1k Ohm"; 305 break; 306 307 case DS1343_TRICKLE_2K: 308 resistors = "2k Ohm"; 309 break; 310 311 case DS1343_TRICKLE_4K: 312 resistors = "4k Ohm"; 313 break; 314 315 default: 316 diodes = "disabled"; 317 break; 318 } 319 } 320 321 return sprintf(buf, "%s %s\n", diodes, resistors); 322 } 323 324 static DEVICE_ATTR(trickle_charger, S_IRUGO, ds1343_show_tricklecharger, NULL); 325 326 static int ds1343_sysfs_register(struct device *dev) 327 { 328 struct ds1343_priv *priv = dev_get_drvdata(dev); 329 int err; 330 331 err = device_create_file(dev, &dev_attr_glitch_filter); 332 if (err) 333 return err; 334 335 err = device_create_file(dev, &dev_attr_trickle_charger); 336 if (err) 337 goto error1; 338 339 err = device_create_bin_file(dev, &nvram_attr); 340 if (err) 341 goto error2; 342 343 if (priv->irq <= 0) 344 return err; 345 346 err = device_create_file(dev, &dev_attr_alarm_mode); 347 if (err) 348 goto error3; 349 350 err = device_create_file(dev, &dev_attr_alarm_status); 351 if (!err) 352 return err; 353 354 device_remove_file(dev, &dev_attr_alarm_mode); 355 356 error3: 357 device_remove_bin_file(dev, &nvram_attr); 358 359 error2: 360 device_remove_file(dev, &dev_attr_trickle_charger); 361 362 error1: 363 device_remove_file(dev, &dev_attr_glitch_filter); 364 365 return err; 366 } 367 368 static void ds1343_sysfs_unregister(struct device *dev) 369 { 370 struct ds1343_priv *priv = dev_get_drvdata(dev); 371 372 device_remove_file(dev, &dev_attr_glitch_filter); 373 device_remove_file(dev, &dev_attr_trickle_charger); 374 device_remove_bin_file(dev, &nvram_attr); 375 376 if (priv->irq <= 0) 377 return; 378 379 device_remove_file(dev, &dev_attr_alarm_status); 380 device_remove_file(dev, &dev_attr_alarm_mode); 381 } 382 383 static int ds1343_read_time(struct device *dev, struct rtc_time *dt) 384 { 385 struct ds1343_priv *priv = dev_get_drvdata(dev); 386 unsigned char buf[7]; 387 int res; 388 389 res = regmap_bulk_read(priv->map, DS1343_SECONDS_REG, buf, 7); 390 if (res) 391 return res; 392 393 dt->tm_sec = bcd2bin(buf[0]); 394 dt->tm_min = bcd2bin(buf[1]); 395 dt->tm_hour = bcd2bin(buf[2] & 0x3F); 396 dt->tm_wday = bcd2bin(buf[3]) - 1; 397 dt->tm_mday = bcd2bin(buf[4]); 398 dt->tm_mon = bcd2bin(buf[5] & 0x1F) - 1; 399 dt->tm_year = bcd2bin(buf[6]) + 100; /* year offset from 1900 */ 400 401 return rtc_valid_tm(dt); 402 } 403 404 static int ds1343_set_time(struct device *dev, struct rtc_time *dt) 405 { 406 struct ds1343_priv *priv = dev_get_drvdata(dev); 407 int res; 408 409 res = regmap_write(priv->map, DS1343_SECONDS_REG, 410 bin2bcd(dt->tm_sec)); 411 if (res) 412 return res; 413 414 res = regmap_write(priv->map, DS1343_MINUTES_REG, 415 bin2bcd(dt->tm_min)); 416 if (res) 417 return res; 418 419 res = regmap_write(priv->map, DS1343_HOURS_REG, 420 bin2bcd(dt->tm_hour) & 0x3F); 421 if (res) 422 return res; 423 424 res = regmap_write(priv->map, DS1343_DAY_REG, 425 bin2bcd(dt->tm_wday + 1)); 426 if (res) 427 return res; 428 429 res = regmap_write(priv->map, DS1343_DATE_REG, 430 bin2bcd(dt->tm_mday)); 431 if (res) 432 return res; 433 434 res = regmap_write(priv->map, DS1343_MONTH_REG, 435 bin2bcd(dt->tm_mon + 1)); 436 if (res) 437 return res; 438 439 dt->tm_year %= 100; 440 441 res = regmap_write(priv->map, DS1343_YEAR_REG, 442 bin2bcd(dt->tm_year)); 443 if (res) 444 return res; 445 446 return 0; 447 } 448 449 static int ds1343_update_alarm(struct device *dev) 450 { 451 struct ds1343_priv *priv = dev_get_drvdata(dev); 452 unsigned int control, stat; 453 unsigned char buf[4]; 454 int res = 0; 455 456 res = regmap_read(priv->map, DS1343_CONTROL_REG, &control); 457 if (res) 458 return res; 459 460 res = regmap_read(priv->map, DS1343_STATUS_REG, &stat); 461 if (res) 462 return res; 463 464 control &= ~(DS1343_A0IE); 465 stat &= ~(DS1343_IRQF0); 466 467 res = regmap_write(priv->map, DS1343_CONTROL_REG, control); 468 if (res) 469 return res; 470 471 res = regmap_write(priv->map, DS1343_STATUS_REG, stat); 472 if (res) 473 return res; 474 475 buf[0] = priv->alarm_sec < 0 || (priv->irqen & RTC_UF) ? 476 0x80 : bin2bcd(priv->alarm_sec) & 0x7F; 477 buf[1] = priv->alarm_min < 0 || (priv->irqen & RTC_UF) ? 478 0x80 : bin2bcd(priv->alarm_min) & 0x7F; 479 buf[2] = priv->alarm_hour < 0 || (priv->irqen & RTC_UF) ? 480 0x80 : bin2bcd(priv->alarm_hour) & 0x3F; 481 buf[3] = priv->alarm_mday < 0 || (priv->irqen & RTC_UF) ? 482 0x80 : bin2bcd(priv->alarm_mday) & 0x7F; 483 484 res = regmap_bulk_write(priv->map, DS1343_ALM0_SEC_REG, buf, 4); 485 if (res) 486 return res; 487 488 if (priv->irqen) { 489 control |= DS1343_A0IE; 490 res = regmap_write(priv->map, DS1343_CONTROL_REG, control); 491 } 492 493 return res; 494 } 495 496 static int ds1343_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) 497 { 498 struct ds1343_priv *priv = dev_get_drvdata(dev); 499 int res = 0; 500 unsigned int stat; 501 502 if (priv->irq <= 0) 503 return -EINVAL; 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 alarm->enabled = !!(priv->irqen & RTC_AF); 512 alarm->pending = !!(stat & DS1343_IRQF0); 513 514 alarm->time.tm_sec = priv->alarm_sec < 0 ? 0 : priv->alarm_sec; 515 alarm->time.tm_min = priv->alarm_min < 0 ? 0 : priv->alarm_min; 516 alarm->time.tm_hour = priv->alarm_hour < 0 ? 0 : priv->alarm_hour; 517 alarm->time.tm_mday = priv->alarm_mday < 0 ? 0 : priv->alarm_mday; 518 519 alarm->time.tm_mon = -1; 520 alarm->time.tm_year = -1; 521 alarm->time.tm_wday = -1; 522 alarm->time.tm_yday = -1; 523 alarm->time.tm_isdst = -1; 524 525 out: 526 mutex_unlock(&priv->mutex); 527 return res; 528 } 529 530 static int ds1343_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) 531 { 532 struct ds1343_priv *priv = dev_get_drvdata(dev); 533 int res = 0; 534 535 if (priv->irq <= 0) 536 return -EINVAL; 537 538 mutex_lock(&priv->mutex); 539 540 priv->alarm_sec = alarm->time.tm_sec; 541 priv->alarm_min = alarm->time.tm_min; 542 priv->alarm_hour = alarm->time.tm_hour; 543 priv->alarm_mday = alarm->time.tm_mday; 544 545 if (alarm->enabled) 546 priv->irqen |= RTC_AF; 547 548 res = ds1343_update_alarm(dev); 549 550 mutex_unlock(&priv->mutex); 551 552 return res; 553 } 554 555 static int ds1343_alarm_irq_enable(struct device *dev, unsigned int enabled) 556 { 557 struct ds1343_priv *priv = dev_get_drvdata(dev); 558 int res = 0; 559 560 if (priv->irq <= 0) 561 return -EINVAL; 562 563 mutex_lock(&priv->mutex); 564 565 if (enabled) 566 priv->irqen |= RTC_AF; 567 else 568 priv->irqen &= ~RTC_AF; 569 570 res = ds1343_update_alarm(dev); 571 572 mutex_unlock(&priv->mutex); 573 574 return res; 575 } 576 577 static irqreturn_t ds1343_thread(int irq, void *dev_id) 578 { 579 struct ds1343_priv *priv = dev_id; 580 unsigned int stat, control; 581 int res = 0; 582 583 mutex_lock(&priv->mutex); 584 585 res = regmap_read(priv->map, DS1343_STATUS_REG, &stat); 586 if (res) 587 goto out; 588 589 if (stat & DS1343_IRQF0) { 590 stat &= ~DS1343_IRQF0; 591 regmap_write(priv->map, DS1343_STATUS_REG, stat); 592 593 res = regmap_read(priv->map, DS1343_CONTROL_REG, &control); 594 if (res) 595 goto out; 596 597 control &= ~DS1343_A0IE; 598 regmap_write(priv->map, DS1343_CONTROL_REG, control); 599 600 rtc_update_irq(priv->rtc, 1, RTC_AF | RTC_IRQF); 601 } 602 603 out: 604 mutex_unlock(&priv->mutex); 605 return IRQ_HANDLED; 606 } 607 608 static const struct rtc_class_ops ds1343_rtc_ops = { 609 .ioctl = ds1343_ioctl, 610 .read_time = ds1343_read_time, 611 .set_time = ds1343_set_time, 612 .read_alarm = ds1343_read_alarm, 613 .set_alarm = ds1343_set_alarm, 614 .alarm_irq_enable = ds1343_alarm_irq_enable, 615 }; 616 617 static int ds1343_probe(struct spi_device *spi) 618 { 619 struct ds1343_priv *priv; 620 struct regmap_config config; 621 unsigned int data; 622 int res; 623 624 memset(&config, 0, sizeof(config)); 625 config.reg_bits = 8; 626 config.val_bits = 8; 627 config.write_flag_mask = 0x80; 628 629 priv = devm_kzalloc(&spi->dev, sizeof(struct ds1343_priv), GFP_KERNEL); 630 if (!priv) 631 return -ENOMEM; 632 633 priv->spi = spi; 634 mutex_init(&priv->mutex); 635 636 /* RTC DS1347 works in spi mode 3 and 637 * its chip select is active high 638 */ 639 spi->mode = SPI_MODE_3 | SPI_CS_HIGH; 640 spi->bits_per_word = 8; 641 res = spi_setup(spi); 642 if (res) 643 return res; 644 645 spi_set_drvdata(spi, priv); 646 647 priv->map = devm_regmap_init_spi(spi, &config); 648 649 if (IS_ERR(priv->map)) { 650 dev_err(&spi->dev, "spi regmap init failed for rtc ds1343\n"); 651 return PTR_ERR(priv->map); 652 } 653 654 res = regmap_read(priv->map, DS1343_SECONDS_REG, &data); 655 if (res) 656 return res; 657 658 regmap_read(priv->map, DS1343_CONTROL_REG, &data); 659 data |= DS1343_INTCN; 660 data &= ~(DS1343_EOSC | DS1343_A1IE | DS1343_A0IE); 661 regmap_write(priv->map, DS1343_CONTROL_REG, data); 662 663 regmap_read(priv->map, DS1343_STATUS_REG, &data); 664 data &= ~(DS1343_OSF | DS1343_IRQF1 | DS1343_IRQF0); 665 regmap_write(priv->map, DS1343_STATUS_REG, data); 666 667 priv->rtc = devm_rtc_device_register(&spi->dev, "ds1343", 668 &ds1343_rtc_ops, THIS_MODULE); 669 if (IS_ERR(priv->rtc)) { 670 dev_err(&spi->dev, "unable to register rtc ds1343\n"); 671 return PTR_ERR(priv->rtc); 672 } 673 674 priv->irq = spi->irq; 675 676 if (priv->irq >= 0) { 677 res = devm_request_threaded_irq(&spi->dev, spi->irq, NULL, 678 ds1343_thread, 679 IRQF_NO_SUSPEND | IRQF_ONESHOT, 680 "ds1343", priv); 681 if (res) { 682 priv->irq = -1; 683 dev_err(&spi->dev, 684 "unable to request irq for rtc ds1343\n"); 685 } else { 686 device_set_wakeup_capable(&spi->dev, 1); 687 } 688 } 689 690 res = ds1343_sysfs_register(&spi->dev); 691 if (res) 692 dev_err(&spi->dev, 693 "unable to create sysfs entries for rtc ds1343\n"); 694 695 return 0; 696 } 697 698 static int ds1343_remove(struct spi_device *spi) 699 { 700 struct ds1343_priv *priv = spi_get_drvdata(spi); 701 702 if (spi->irq) { 703 mutex_lock(&priv->mutex); 704 priv->irqen &= ~RTC_AF; 705 mutex_unlock(&priv->mutex); 706 707 devm_free_irq(&spi->dev, spi->irq, priv); 708 } 709 710 spi_set_drvdata(spi, NULL); 711 712 ds1343_sysfs_unregister(&spi->dev); 713 714 return 0; 715 } 716 717 #ifdef CONFIG_PM_SLEEP 718 719 static int ds1343_suspend(struct device *dev) 720 { 721 struct spi_device *spi = to_spi_device(dev); 722 723 if (spi->irq >= 0 && device_may_wakeup(dev)) 724 enable_irq_wake(spi->irq); 725 726 return 0; 727 } 728 729 static int ds1343_resume(struct device *dev) 730 { 731 struct spi_device *spi = to_spi_device(dev); 732 733 if (spi->irq >= 0 && device_may_wakeup(dev)) 734 disable_irq_wake(spi->irq); 735 736 return 0; 737 } 738 739 #endif 740 741 static SIMPLE_DEV_PM_OPS(ds1343_pm, ds1343_suspend, ds1343_resume); 742 743 static struct spi_driver ds1343_driver = { 744 .driver = { 745 .name = "ds1343", 746 .owner = THIS_MODULE, 747 .pm = &ds1343_pm, 748 }, 749 .probe = ds1343_probe, 750 .remove = ds1343_remove, 751 .id_table = ds1343_id, 752 }; 753 754 module_spi_driver(ds1343_driver); 755 756 MODULE_DESCRIPTION("DS1343 RTC SPI Driver"); 757 MODULE_AUTHOR("Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>," 758 "Ankur Srivastava <sankurece@gmail.com>"); 759 MODULE_LICENSE("GPL v2"); 760 MODULE_VERSION(DS1343_DRV_VERSION); 761