1 /* 2 * A driver for the I2C members of the Abracon AB x8xx RTC family, 3 * and compatible: AB 1805 and AB 0805 4 * 5 * Copyright 2014-2015 Macq S.A. 6 * 7 * Author: Philippe De Muyter <phdm@macqel.be> 8 * Author: Alexandre Belloni <alexandre.belloni@free-electrons.com> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 * 14 */ 15 16 #include <linux/bcd.h> 17 #include <linux/i2c.h> 18 #include <linux/module.h> 19 #include <linux/rtc.h> 20 21 #define ABX8XX_REG_HTH 0x00 22 #define ABX8XX_REG_SC 0x01 23 #define ABX8XX_REG_MN 0x02 24 #define ABX8XX_REG_HR 0x03 25 #define ABX8XX_REG_DA 0x04 26 #define ABX8XX_REG_MO 0x05 27 #define ABX8XX_REG_YR 0x06 28 #define ABX8XX_REG_WD 0x07 29 30 #define ABX8XX_REG_AHTH 0x08 31 #define ABX8XX_REG_ASC 0x09 32 #define ABX8XX_REG_AMN 0x0a 33 #define ABX8XX_REG_AHR 0x0b 34 #define ABX8XX_REG_ADA 0x0c 35 #define ABX8XX_REG_AMO 0x0d 36 #define ABX8XX_REG_AWD 0x0e 37 38 #define ABX8XX_REG_STATUS 0x0f 39 #define ABX8XX_STATUS_AF BIT(2) 40 41 #define ABX8XX_REG_CTRL1 0x10 42 #define ABX8XX_CTRL_WRITE BIT(0) 43 #define ABX8XX_CTRL_ARST BIT(2) 44 #define ABX8XX_CTRL_12_24 BIT(6) 45 46 #define ABX8XX_REG_IRQ 0x12 47 #define ABX8XX_IRQ_AIE BIT(2) 48 #define ABX8XX_IRQ_IM_1_4 (0x3 << 5) 49 50 #define ABX8XX_REG_CD_TIMER_CTL 0x18 51 52 #define ABX8XX_REG_OSC 0x1c 53 #define ABX8XX_OSC_FOS BIT(3) 54 #define ABX8XX_OSC_BOS BIT(4) 55 #define ABX8XX_OSC_ACAL_512 BIT(5) 56 #define ABX8XX_OSC_ACAL_1024 BIT(6) 57 58 #define ABX8XX_OSC_OSEL BIT(7) 59 60 #define ABX8XX_REG_OSS 0x1d 61 #define ABX8XX_OSS_OF BIT(1) 62 #define ABX8XX_OSS_OMODE BIT(4) 63 64 #define ABX8XX_REG_CFG_KEY 0x1f 65 #define ABX8XX_CFG_KEY_OSC 0xa1 66 #define ABX8XX_CFG_KEY_MISC 0x9d 67 68 #define ABX8XX_REG_ID0 0x28 69 70 #define ABX8XX_REG_TRICKLE 0x20 71 #define ABX8XX_TRICKLE_CHARGE_ENABLE 0xa0 72 #define ABX8XX_TRICKLE_STANDARD_DIODE 0x8 73 #define ABX8XX_TRICKLE_SCHOTTKY_DIODE 0x4 74 75 static u8 trickle_resistors[] = {0, 3, 6, 11}; 76 77 enum abx80x_chip {AB0801, AB0803, AB0804, AB0805, 78 AB1801, AB1803, AB1804, AB1805, ABX80X}; 79 80 struct abx80x_cap { 81 u16 pn; 82 bool has_tc; 83 }; 84 85 static struct abx80x_cap abx80x_caps[] = { 86 [AB0801] = {.pn = 0x0801}, 87 [AB0803] = {.pn = 0x0803}, 88 [AB0804] = {.pn = 0x0804, .has_tc = true}, 89 [AB0805] = {.pn = 0x0805, .has_tc = true}, 90 [AB1801] = {.pn = 0x1801}, 91 [AB1803] = {.pn = 0x1803}, 92 [AB1804] = {.pn = 0x1804, .has_tc = true}, 93 [AB1805] = {.pn = 0x1805, .has_tc = true}, 94 [ABX80X] = {.pn = 0} 95 }; 96 97 static int abx80x_is_rc_mode(struct i2c_client *client) 98 { 99 int flags = 0; 100 101 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSS); 102 if (flags < 0) { 103 dev_err(&client->dev, 104 "Failed to read autocalibration attribute\n"); 105 return flags; 106 } 107 108 return (flags & ABX8XX_OSS_OMODE) ? 1 : 0; 109 } 110 111 static int abx80x_enable_trickle_charger(struct i2c_client *client, 112 u8 trickle_cfg) 113 { 114 int err; 115 116 /* 117 * Write the configuration key register to enable access to the Trickle 118 * register 119 */ 120 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_CFG_KEY, 121 ABX8XX_CFG_KEY_MISC); 122 if (err < 0) { 123 dev_err(&client->dev, "Unable to write configuration key\n"); 124 return -EIO; 125 } 126 127 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_TRICKLE, 128 ABX8XX_TRICKLE_CHARGE_ENABLE | 129 trickle_cfg); 130 if (err < 0) { 131 dev_err(&client->dev, "Unable to write trickle register\n"); 132 return -EIO; 133 } 134 135 return 0; 136 } 137 138 static int abx80x_rtc_read_time(struct device *dev, struct rtc_time *tm) 139 { 140 struct i2c_client *client = to_i2c_client(dev); 141 unsigned char buf[8]; 142 int err, flags, rc_mode = 0; 143 144 /* Read the Oscillator Failure only in XT mode */ 145 rc_mode = abx80x_is_rc_mode(client); 146 if (rc_mode < 0) 147 return rc_mode; 148 149 if (!rc_mode) { 150 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSS); 151 if (flags < 0) 152 return flags; 153 154 if (flags & ABX8XX_OSS_OF) { 155 dev_err(dev, "Oscillator failure, data is invalid.\n"); 156 return -EINVAL; 157 } 158 } 159 160 err = i2c_smbus_read_i2c_block_data(client, ABX8XX_REG_HTH, 161 sizeof(buf), buf); 162 if (err < 0) { 163 dev_err(&client->dev, "Unable to read date\n"); 164 return -EIO; 165 } 166 167 tm->tm_sec = bcd2bin(buf[ABX8XX_REG_SC] & 0x7F); 168 tm->tm_min = bcd2bin(buf[ABX8XX_REG_MN] & 0x7F); 169 tm->tm_hour = bcd2bin(buf[ABX8XX_REG_HR] & 0x3F); 170 tm->tm_wday = buf[ABX8XX_REG_WD] & 0x7; 171 tm->tm_mday = bcd2bin(buf[ABX8XX_REG_DA] & 0x3F); 172 tm->tm_mon = bcd2bin(buf[ABX8XX_REG_MO] & 0x1F) - 1; 173 tm->tm_year = bcd2bin(buf[ABX8XX_REG_YR]) + 100; 174 175 return 0; 176 } 177 178 static int abx80x_rtc_set_time(struct device *dev, struct rtc_time *tm) 179 { 180 struct i2c_client *client = to_i2c_client(dev); 181 unsigned char buf[8]; 182 int err, flags; 183 184 if (tm->tm_year < 100) 185 return -EINVAL; 186 187 buf[ABX8XX_REG_HTH] = 0; 188 buf[ABX8XX_REG_SC] = bin2bcd(tm->tm_sec); 189 buf[ABX8XX_REG_MN] = bin2bcd(tm->tm_min); 190 buf[ABX8XX_REG_HR] = bin2bcd(tm->tm_hour); 191 buf[ABX8XX_REG_DA] = bin2bcd(tm->tm_mday); 192 buf[ABX8XX_REG_MO] = bin2bcd(tm->tm_mon + 1); 193 buf[ABX8XX_REG_YR] = bin2bcd(tm->tm_year - 100); 194 buf[ABX8XX_REG_WD] = tm->tm_wday; 195 196 err = i2c_smbus_write_i2c_block_data(client, ABX8XX_REG_HTH, 197 sizeof(buf), buf); 198 if (err < 0) { 199 dev_err(&client->dev, "Unable to write to date registers\n"); 200 return -EIO; 201 } 202 203 /* Clear the OF bit of Oscillator Status Register */ 204 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSS); 205 if (flags < 0) 206 return flags; 207 208 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_OSS, 209 flags & ~ABX8XX_OSS_OF); 210 if (err < 0) { 211 dev_err(&client->dev, "Unable to write oscillator status register\n"); 212 return err; 213 } 214 215 return 0; 216 } 217 218 static irqreturn_t abx80x_handle_irq(int irq, void *dev_id) 219 { 220 struct i2c_client *client = dev_id; 221 struct rtc_device *rtc = i2c_get_clientdata(client); 222 int status; 223 224 status = i2c_smbus_read_byte_data(client, ABX8XX_REG_STATUS); 225 if (status < 0) 226 return IRQ_NONE; 227 228 if (status & ABX8XX_STATUS_AF) 229 rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF); 230 231 i2c_smbus_write_byte_data(client, ABX8XX_REG_STATUS, 0); 232 233 return IRQ_HANDLED; 234 } 235 236 static int abx80x_read_alarm(struct device *dev, struct rtc_wkalrm *t) 237 { 238 struct i2c_client *client = to_i2c_client(dev); 239 unsigned char buf[7]; 240 241 int irq_mask, err; 242 243 if (client->irq <= 0) 244 return -EINVAL; 245 246 err = i2c_smbus_read_i2c_block_data(client, ABX8XX_REG_ASC, 247 sizeof(buf), buf); 248 if (err) 249 return err; 250 251 irq_mask = i2c_smbus_read_byte_data(client, ABX8XX_REG_IRQ); 252 if (irq_mask < 0) 253 return irq_mask; 254 255 t->time.tm_sec = bcd2bin(buf[0] & 0x7F); 256 t->time.tm_min = bcd2bin(buf[1] & 0x7F); 257 t->time.tm_hour = bcd2bin(buf[2] & 0x3F); 258 t->time.tm_mday = bcd2bin(buf[3] & 0x3F); 259 t->time.tm_mon = bcd2bin(buf[4] & 0x1F) - 1; 260 t->time.tm_wday = buf[5] & 0x7; 261 262 t->enabled = !!(irq_mask & ABX8XX_IRQ_AIE); 263 t->pending = (buf[6] & ABX8XX_STATUS_AF) && t->enabled; 264 265 return err; 266 } 267 268 static int abx80x_set_alarm(struct device *dev, struct rtc_wkalrm *t) 269 { 270 struct i2c_client *client = to_i2c_client(dev); 271 u8 alarm[6]; 272 int err; 273 274 if (client->irq <= 0) 275 return -EINVAL; 276 277 alarm[0] = 0x0; 278 alarm[1] = bin2bcd(t->time.tm_sec); 279 alarm[2] = bin2bcd(t->time.tm_min); 280 alarm[3] = bin2bcd(t->time.tm_hour); 281 alarm[4] = bin2bcd(t->time.tm_mday); 282 alarm[5] = bin2bcd(t->time.tm_mon + 1); 283 284 err = i2c_smbus_write_i2c_block_data(client, ABX8XX_REG_AHTH, 285 sizeof(alarm), alarm); 286 if (err < 0) { 287 dev_err(&client->dev, "Unable to write alarm registers\n"); 288 return -EIO; 289 } 290 291 if (t->enabled) { 292 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_IRQ, 293 (ABX8XX_IRQ_IM_1_4 | 294 ABX8XX_IRQ_AIE)); 295 if (err) 296 return err; 297 } 298 299 return 0; 300 } 301 302 static int abx80x_rtc_set_autocalibration(struct device *dev, 303 int autocalibration) 304 { 305 struct i2c_client *client = to_i2c_client(dev); 306 int retval, flags = 0; 307 308 if ((autocalibration != 0) && (autocalibration != 1024) && 309 (autocalibration != 512)) { 310 dev_err(dev, "autocalibration value outside permitted range\n"); 311 return -EINVAL; 312 } 313 314 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSC); 315 if (flags < 0) 316 return flags; 317 318 if (autocalibration == 0) { 319 flags &= ~(ABX8XX_OSC_ACAL_512 | ABX8XX_OSC_ACAL_1024); 320 } else if (autocalibration == 1024) { 321 /* 1024 autocalibration is 0x10 */ 322 flags |= ABX8XX_OSC_ACAL_1024; 323 flags &= ~(ABX8XX_OSC_ACAL_512); 324 } else { 325 /* 512 autocalibration is 0x11 */ 326 flags |= (ABX8XX_OSC_ACAL_1024 | ABX8XX_OSC_ACAL_512); 327 } 328 329 /* Unlock write access to Oscillator Control Register */ 330 retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_CFG_KEY, 331 ABX8XX_CFG_KEY_OSC); 332 if (retval < 0) { 333 dev_err(dev, "Failed to write CONFIG_KEY register\n"); 334 return retval; 335 } 336 337 retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_OSC, flags); 338 339 return retval; 340 } 341 342 static int abx80x_rtc_get_autocalibration(struct device *dev) 343 { 344 struct i2c_client *client = to_i2c_client(dev); 345 int flags = 0, autocalibration; 346 347 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSC); 348 if (flags < 0) 349 return flags; 350 351 if (flags & ABX8XX_OSC_ACAL_512) 352 autocalibration = 512; 353 else if (flags & ABX8XX_OSC_ACAL_1024) 354 autocalibration = 1024; 355 else 356 autocalibration = 0; 357 358 return autocalibration; 359 } 360 361 static ssize_t autocalibration_store(struct device *dev, 362 struct device_attribute *attr, 363 const char *buf, size_t count) 364 { 365 int retval; 366 unsigned long autocalibration = 0; 367 368 retval = kstrtoul(buf, 10, &autocalibration); 369 if (retval < 0) { 370 dev_err(dev, "Failed to store RTC autocalibration attribute\n"); 371 return -EINVAL; 372 } 373 374 retval = abx80x_rtc_set_autocalibration(dev, autocalibration); 375 376 return retval ? retval : count; 377 } 378 379 static ssize_t autocalibration_show(struct device *dev, 380 struct device_attribute *attr, char *buf) 381 { 382 int autocalibration = 0; 383 384 autocalibration = abx80x_rtc_get_autocalibration(dev); 385 if (autocalibration < 0) { 386 dev_err(dev, "Failed to read RTC autocalibration\n"); 387 sprintf(buf, "0\n"); 388 return autocalibration; 389 } 390 391 return sprintf(buf, "%d\n", autocalibration); 392 } 393 394 static DEVICE_ATTR_RW(autocalibration); 395 396 static ssize_t oscillator_store(struct device *dev, 397 struct device_attribute *attr, 398 const char *buf, size_t count) 399 { 400 struct i2c_client *client = to_i2c_client(dev); 401 int retval, flags, rc_mode = 0; 402 403 if (strncmp(buf, "rc", 2) == 0) { 404 rc_mode = 1; 405 } else if (strncmp(buf, "xtal", 4) == 0) { 406 rc_mode = 0; 407 } else { 408 dev_err(dev, "Oscillator selection value outside permitted ones\n"); 409 return -EINVAL; 410 } 411 412 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSC); 413 if (flags < 0) 414 return flags; 415 416 if (rc_mode == 0) 417 flags &= ~(ABX8XX_OSC_OSEL); 418 else 419 flags |= (ABX8XX_OSC_OSEL); 420 421 /* Unlock write access on Oscillator Control register */ 422 retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_CFG_KEY, 423 ABX8XX_CFG_KEY_OSC); 424 if (retval < 0) { 425 dev_err(dev, "Failed to write CONFIG_KEY register\n"); 426 return retval; 427 } 428 429 retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_OSC, flags); 430 if (retval < 0) { 431 dev_err(dev, "Failed to write Oscillator Control register\n"); 432 return retval; 433 } 434 435 return retval ? retval : count; 436 } 437 438 static ssize_t oscillator_show(struct device *dev, 439 struct device_attribute *attr, char *buf) 440 { 441 int rc_mode = 0; 442 struct i2c_client *client = to_i2c_client(dev); 443 444 rc_mode = abx80x_is_rc_mode(client); 445 446 if (rc_mode < 0) { 447 dev_err(dev, "Failed to read RTC oscillator selection\n"); 448 sprintf(buf, "\n"); 449 return rc_mode; 450 } 451 452 if (rc_mode) 453 return sprintf(buf, "rc\n"); 454 else 455 return sprintf(buf, "xtal\n"); 456 } 457 458 static DEVICE_ATTR_RW(oscillator); 459 460 static struct attribute *rtc_calib_attrs[] = { 461 &dev_attr_autocalibration.attr, 462 &dev_attr_oscillator.attr, 463 NULL, 464 }; 465 466 static const struct attribute_group rtc_calib_attr_group = { 467 .attrs = rtc_calib_attrs, 468 }; 469 470 static int abx80x_alarm_irq_enable(struct device *dev, unsigned int enabled) 471 { 472 struct i2c_client *client = to_i2c_client(dev); 473 int err; 474 475 if (enabled) 476 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_IRQ, 477 (ABX8XX_IRQ_IM_1_4 | 478 ABX8XX_IRQ_AIE)); 479 else 480 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_IRQ, 481 ABX8XX_IRQ_IM_1_4); 482 return err; 483 } 484 485 static const struct rtc_class_ops abx80x_rtc_ops = { 486 .read_time = abx80x_rtc_read_time, 487 .set_time = abx80x_rtc_set_time, 488 .read_alarm = abx80x_read_alarm, 489 .set_alarm = abx80x_set_alarm, 490 .alarm_irq_enable = abx80x_alarm_irq_enable, 491 }; 492 493 static int abx80x_dt_trickle_cfg(struct device_node *np) 494 { 495 const char *diode; 496 int trickle_cfg = 0; 497 int i, ret; 498 u32 tmp; 499 500 ret = of_property_read_string(np, "abracon,tc-diode", &diode); 501 if (ret) 502 return ret; 503 504 if (!strcmp(diode, "standard")) 505 trickle_cfg |= ABX8XX_TRICKLE_STANDARD_DIODE; 506 else if (!strcmp(diode, "schottky")) 507 trickle_cfg |= ABX8XX_TRICKLE_SCHOTTKY_DIODE; 508 else 509 return -EINVAL; 510 511 ret = of_property_read_u32(np, "abracon,tc-resistor", &tmp); 512 if (ret) 513 return ret; 514 515 for (i = 0; i < sizeof(trickle_resistors); i++) 516 if (trickle_resistors[i] == tmp) 517 break; 518 519 if (i == sizeof(trickle_resistors)) 520 return -EINVAL; 521 522 return (trickle_cfg | i); 523 } 524 525 static void rtc_calib_remove_sysfs_group(void *_dev) 526 { 527 struct device *dev = _dev; 528 529 sysfs_remove_group(&dev->kobj, &rtc_calib_attr_group); 530 } 531 532 static int abx80x_probe(struct i2c_client *client, 533 const struct i2c_device_id *id) 534 { 535 struct device_node *np = client->dev.of_node; 536 struct rtc_device *rtc; 537 int i, data, err, trickle_cfg = -EINVAL; 538 char buf[7]; 539 unsigned int part = id->driver_data; 540 unsigned int partnumber; 541 unsigned int majrev, minrev; 542 unsigned int lot; 543 unsigned int wafer; 544 unsigned int uid; 545 546 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) 547 return -ENODEV; 548 549 err = i2c_smbus_read_i2c_block_data(client, ABX8XX_REG_ID0, 550 sizeof(buf), buf); 551 if (err < 0) { 552 dev_err(&client->dev, "Unable to read partnumber\n"); 553 return -EIO; 554 } 555 556 partnumber = (buf[0] << 8) | buf[1]; 557 majrev = buf[2] >> 3; 558 minrev = buf[2] & 0x7; 559 lot = ((buf[4] & 0x80) << 2) | ((buf[6] & 0x80) << 1) | buf[3]; 560 uid = ((buf[4] & 0x7f) << 8) | buf[5]; 561 wafer = (buf[6] & 0x7c) >> 2; 562 dev_info(&client->dev, "model %04x, revision %u.%u, lot %x, wafer %x, uid %x\n", 563 partnumber, majrev, minrev, lot, wafer, uid); 564 565 data = i2c_smbus_read_byte_data(client, ABX8XX_REG_CTRL1); 566 if (data < 0) { 567 dev_err(&client->dev, "Unable to read control register\n"); 568 return -EIO; 569 } 570 571 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_CTRL1, 572 ((data & ~(ABX8XX_CTRL_12_24 | 573 ABX8XX_CTRL_ARST)) | 574 ABX8XX_CTRL_WRITE)); 575 if (err < 0) { 576 dev_err(&client->dev, "Unable to write control register\n"); 577 return -EIO; 578 } 579 580 /* part autodetection */ 581 if (part == ABX80X) { 582 for (i = 0; abx80x_caps[i].pn; i++) 583 if (partnumber == abx80x_caps[i].pn) 584 break; 585 if (abx80x_caps[i].pn == 0) { 586 dev_err(&client->dev, "Unknown part: %04x\n", 587 partnumber); 588 return -EINVAL; 589 } 590 part = i; 591 } 592 593 if (partnumber != abx80x_caps[part].pn) { 594 dev_err(&client->dev, "partnumber mismatch %04x != %04x\n", 595 partnumber, abx80x_caps[part].pn); 596 return -EINVAL; 597 } 598 599 if (np && abx80x_caps[part].has_tc) 600 trickle_cfg = abx80x_dt_trickle_cfg(np); 601 602 if (trickle_cfg > 0) { 603 dev_info(&client->dev, "Enabling trickle charger: %02x\n", 604 trickle_cfg); 605 abx80x_enable_trickle_charger(client, trickle_cfg); 606 } 607 608 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_CD_TIMER_CTL, 609 BIT(2)); 610 if (err) 611 return err; 612 613 rtc = devm_rtc_allocate_device(&client->dev); 614 if (IS_ERR(rtc)) 615 return PTR_ERR(rtc); 616 617 rtc->ops = &abx80x_rtc_ops; 618 619 i2c_set_clientdata(client, rtc); 620 621 if (client->irq > 0) { 622 dev_info(&client->dev, "IRQ %d supplied\n", client->irq); 623 err = devm_request_threaded_irq(&client->dev, client->irq, NULL, 624 abx80x_handle_irq, 625 IRQF_SHARED | IRQF_ONESHOT, 626 "abx8xx", 627 client); 628 if (err) { 629 dev_err(&client->dev, "unable to request IRQ, alarms disabled\n"); 630 client->irq = 0; 631 } 632 } 633 634 /* Export sysfs entries */ 635 err = sysfs_create_group(&(&client->dev)->kobj, &rtc_calib_attr_group); 636 if (err) { 637 dev_err(&client->dev, "Failed to create sysfs group: %d\n", 638 err); 639 return err; 640 } 641 642 err = devm_add_action_or_reset(&client->dev, 643 rtc_calib_remove_sysfs_group, 644 &client->dev); 645 if (err) { 646 dev_err(&client->dev, 647 "Failed to add sysfs cleanup action: %d\n", 648 err); 649 return err; 650 } 651 652 err = rtc_register_device(rtc); 653 654 return err; 655 } 656 657 static int abx80x_remove(struct i2c_client *client) 658 { 659 return 0; 660 } 661 662 static const struct i2c_device_id abx80x_id[] = { 663 { "abx80x", ABX80X }, 664 { "ab0801", AB0801 }, 665 { "ab0803", AB0803 }, 666 { "ab0804", AB0804 }, 667 { "ab0805", AB0805 }, 668 { "ab1801", AB1801 }, 669 { "ab1803", AB1803 }, 670 { "ab1804", AB1804 }, 671 { "ab1805", AB1805 }, 672 { "rv1805", AB1805 }, 673 { } 674 }; 675 MODULE_DEVICE_TABLE(i2c, abx80x_id); 676 677 static struct i2c_driver abx80x_driver = { 678 .driver = { 679 .name = "rtc-abx80x", 680 }, 681 .probe = abx80x_probe, 682 .remove = abx80x_remove, 683 .id_table = abx80x_id, 684 }; 685 686 module_i2c_driver(abx80x_driver); 687 688 MODULE_AUTHOR("Philippe De Muyter <phdm@macqel.be>"); 689 MODULE_AUTHOR("Alexandre Belloni <alexandre.belloni@free-electrons.com>"); 690 MODULE_DESCRIPTION("Abracon ABX80X RTC driver"); 691 MODULE_LICENSE("GPL v2"); 692