1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * rtc-fm3130.c - RTC driver for Ramtron FM3130 I2C chip. 4 * 5 * Copyright (C) 2008 Sergey Lapin 6 * Based on ds1307 driver by James Chapman and David Brownell 7 */ 8 9 #include <linux/module.h> 10 #include <linux/i2c.h> 11 #include <linux/rtc.h> 12 #include <linux/bcd.h> 13 #include <linux/slab.h> 14 15 #define FM3130_RTC_CONTROL (0x0) 16 #define FM3130_CAL_CONTROL (0x1) 17 #define FM3130_RTC_SECONDS (0x2) 18 #define FM3130_RTC_MINUTES (0x3) 19 #define FM3130_RTC_HOURS (0x4) 20 #define FM3130_RTC_DAY (0x5) 21 #define FM3130_RTC_DATE (0x6) 22 #define FM3130_RTC_MONTHS (0x7) 23 #define FM3130_RTC_YEARS (0x8) 24 25 #define FM3130_ALARM_SECONDS (0x9) 26 #define FM3130_ALARM_MINUTES (0xa) 27 #define FM3130_ALARM_HOURS (0xb) 28 #define FM3130_ALARM_DATE (0xc) 29 #define FM3130_ALARM_MONTHS (0xd) 30 #define FM3130_ALARM_WP_CONTROL (0xe) 31 32 #define FM3130_CAL_CONTROL_BIT_nOSCEN (1 << 7) /* Osciallator enabled */ 33 #define FM3130_RTC_CONTROL_BIT_LB (1 << 7) /* Low battery */ 34 #define FM3130_RTC_CONTROL_BIT_AF (1 << 6) /* Alarm flag */ 35 #define FM3130_RTC_CONTROL_BIT_CF (1 << 5) /* Century overflow */ 36 #define FM3130_RTC_CONTROL_BIT_POR (1 << 4) /* Power on reset */ 37 #define FM3130_RTC_CONTROL_BIT_AEN (1 << 3) /* Alarm enable */ 38 #define FM3130_RTC_CONTROL_BIT_CAL (1 << 2) /* Calibration mode */ 39 #define FM3130_RTC_CONTROL_BIT_WRITE (1 << 1) /* W=1 -> write mode W=0 normal */ 40 #define FM3130_RTC_CONTROL_BIT_READ (1 << 0) /* R=1 -> read mode R=0 normal */ 41 42 #define FM3130_CLOCK_REGS 7 43 #define FM3130_ALARM_REGS 5 44 45 struct fm3130 { 46 u8 reg_addr_time; 47 u8 reg_addr_alarm; 48 u8 regs[15]; 49 struct i2c_msg msg[4]; 50 struct i2c_client *client; 51 struct rtc_device *rtc; 52 int alarm_valid; 53 int data_valid; 54 }; 55 static const struct i2c_device_id fm3130_id[] = { 56 { "fm3130", 0 }, 57 { } 58 }; 59 MODULE_DEVICE_TABLE(i2c, fm3130_id); 60 61 #define FM3130_MODE_NORMAL 0 62 #define FM3130_MODE_WRITE 1 63 #define FM3130_MODE_READ 2 64 65 static void fm3130_rtc_mode(struct device *dev, int mode) 66 { 67 struct fm3130 *fm3130 = dev_get_drvdata(dev); 68 69 fm3130->regs[FM3130_RTC_CONTROL] = 70 i2c_smbus_read_byte_data(fm3130->client, FM3130_RTC_CONTROL); 71 switch (mode) { 72 case FM3130_MODE_NORMAL: 73 fm3130->regs[FM3130_RTC_CONTROL] &= 74 ~(FM3130_RTC_CONTROL_BIT_WRITE | 75 FM3130_RTC_CONTROL_BIT_READ); 76 break; 77 case FM3130_MODE_WRITE: 78 fm3130->regs[FM3130_RTC_CONTROL] |= FM3130_RTC_CONTROL_BIT_WRITE; 79 break; 80 case FM3130_MODE_READ: 81 fm3130->regs[FM3130_RTC_CONTROL] |= FM3130_RTC_CONTROL_BIT_READ; 82 break; 83 default: 84 dev_dbg(dev, "invalid mode %d\n", mode); 85 break; 86 } 87 88 i2c_smbus_write_byte_data(fm3130->client, 89 FM3130_RTC_CONTROL, fm3130->regs[FM3130_RTC_CONTROL]); 90 } 91 92 static int fm3130_get_time(struct device *dev, struct rtc_time *t) 93 { 94 struct fm3130 *fm3130 = dev_get_drvdata(dev); 95 int tmp; 96 97 if (!fm3130->data_valid) { 98 /* We have invalid data in RTC, probably due 99 to battery faults or other problems. Return EIO 100 for now, it will allow us to set data later instead 101 of error during probing which disables device */ 102 return -EIO; 103 } 104 fm3130_rtc_mode(dev, FM3130_MODE_READ); 105 106 /* read the RTC date and time registers all at once */ 107 tmp = i2c_transfer(fm3130->client->adapter, fm3130->msg, 2); 108 if (tmp != 2) { 109 dev_err(dev, "%s error %d\n", "read", tmp); 110 return -EIO; 111 } 112 113 fm3130_rtc_mode(dev, FM3130_MODE_NORMAL); 114 115 dev_dbg(dev, "%s: %15ph\n", "read", fm3130->regs); 116 117 t->tm_sec = bcd2bin(fm3130->regs[FM3130_RTC_SECONDS] & 0x7f); 118 t->tm_min = bcd2bin(fm3130->regs[FM3130_RTC_MINUTES] & 0x7f); 119 tmp = fm3130->regs[FM3130_RTC_HOURS] & 0x3f; 120 t->tm_hour = bcd2bin(tmp); 121 t->tm_wday = bcd2bin(fm3130->regs[FM3130_RTC_DAY] & 0x07) - 1; 122 t->tm_mday = bcd2bin(fm3130->regs[FM3130_RTC_DATE] & 0x3f); 123 tmp = fm3130->regs[FM3130_RTC_MONTHS] & 0x1f; 124 t->tm_mon = bcd2bin(tmp) - 1; 125 126 /* assume 20YY not 19YY, and ignore CF bit */ 127 t->tm_year = bcd2bin(fm3130->regs[FM3130_RTC_YEARS]) + 100; 128 129 dev_dbg(dev, "%s secs=%d, mins=%d, " 130 "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n", 131 "read", t->tm_sec, t->tm_min, 132 t->tm_hour, t->tm_mday, 133 t->tm_mon, t->tm_year, t->tm_wday); 134 135 return 0; 136 } 137 138 139 static int fm3130_set_time(struct device *dev, struct rtc_time *t) 140 { 141 struct fm3130 *fm3130 = dev_get_drvdata(dev); 142 int tmp, i; 143 u8 *buf = fm3130->regs; 144 145 dev_dbg(dev, "%s secs=%d, mins=%d, " 146 "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n", 147 "write", t->tm_sec, t->tm_min, 148 t->tm_hour, t->tm_mday, 149 t->tm_mon, t->tm_year, t->tm_wday); 150 151 /* first register addr */ 152 buf[FM3130_RTC_SECONDS] = bin2bcd(t->tm_sec); 153 buf[FM3130_RTC_MINUTES] = bin2bcd(t->tm_min); 154 buf[FM3130_RTC_HOURS] = bin2bcd(t->tm_hour); 155 buf[FM3130_RTC_DAY] = bin2bcd(t->tm_wday + 1); 156 buf[FM3130_RTC_DATE] = bin2bcd(t->tm_mday); 157 buf[FM3130_RTC_MONTHS] = bin2bcd(t->tm_mon + 1); 158 159 /* assume 20YY not 19YY */ 160 tmp = t->tm_year - 100; 161 buf[FM3130_RTC_YEARS] = bin2bcd(tmp); 162 163 dev_dbg(dev, "%s: %15ph\n", "write", buf); 164 165 fm3130_rtc_mode(dev, FM3130_MODE_WRITE); 166 167 /* Writing time registers, we don't support multibyte transfers */ 168 for (i = 0; i < FM3130_CLOCK_REGS; i++) { 169 i2c_smbus_write_byte_data(fm3130->client, 170 FM3130_RTC_SECONDS + i, 171 fm3130->regs[FM3130_RTC_SECONDS + i]); 172 } 173 174 fm3130_rtc_mode(dev, FM3130_MODE_NORMAL); 175 176 /* We assume here that data are valid once written */ 177 if (!fm3130->data_valid) 178 fm3130->data_valid = 1; 179 return 0; 180 } 181 182 static int fm3130_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) 183 { 184 struct fm3130 *fm3130 = dev_get_drvdata(dev); 185 int tmp; 186 struct rtc_time *tm = &alrm->time; 187 188 if (!fm3130->alarm_valid) { 189 /* 190 * We have invalid alarm in RTC, probably due to battery faults 191 * or other problems. Return EIO for now, it will allow us to 192 * set alarm value later instead of error during probing which 193 * disables device 194 */ 195 return -EIO; 196 } 197 198 /* read the RTC alarm registers all at once */ 199 tmp = i2c_transfer(fm3130->client->adapter, &fm3130->msg[2], 2); 200 if (tmp != 2) { 201 dev_err(dev, "%s error %d\n", "read", tmp); 202 return -EIO; 203 } 204 dev_dbg(dev, "alarm read %02x %02x %02x %02x %02x\n", 205 fm3130->regs[FM3130_ALARM_SECONDS], 206 fm3130->regs[FM3130_ALARM_MINUTES], 207 fm3130->regs[FM3130_ALARM_HOURS], 208 fm3130->regs[FM3130_ALARM_DATE], 209 fm3130->regs[FM3130_ALARM_MONTHS]); 210 211 tm->tm_sec = bcd2bin(fm3130->regs[FM3130_ALARM_SECONDS] & 0x7F); 212 tm->tm_min = bcd2bin(fm3130->regs[FM3130_ALARM_MINUTES] & 0x7F); 213 tm->tm_hour = bcd2bin(fm3130->regs[FM3130_ALARM_HOURS] & 0x3F); 214 tm->tm_mday = bcd2bin(fm3130->regs[FM3130_ALARM_DATE] & 0x3F); 215 tm->tm_mon = bcd2bin(fm3130->regs[FM3130_ALARM_MONTHS] & 0x1F); 216 217 if (tm->tm_mon > 0) 218 tm->tm_mon -= 1; /* RTC is 1-12, tm_mon is 0-11 */ 219 220 dev_dbg(dev, "%s secs=%d, mins=%d, " 221 "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n", 222 "read alarm", tm->tm_sec, tm->tm_min, 223 tm->tm_hour, tm->tm_mday, 224 tm->tm_mon, tm->tm_year, tm->tm_wday); 225 226 /* check if alarm enabled */ 227 fm3130->regs[FM3130_RTC_CONTROL] = 228 i2c_smbus_read_byte_data(fm3130->client, FM3130_RTC_CONTROL); 229 230 if ((fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_AEN) && 231 (~fm3130->regs[FM3130_RTC_CONTROL] & 232 FM3130_RTC_CONTROL_BIT_CAL)) { 233 alrm->enabled = 1; 234 } 235 236 return 0; 237 } 238 239 static int fm3130_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) 240 { 241 struct fm3130 *fm3130 = dev_get_drvdata(dev); 242 struct rtc_time *tm = &alrm->time; 243 int i; 244 245 dev_dbg(dev, "%s secs=%d, mins=%d, " 246 "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n", 247 "write alarm", tm->tm_sec, tm->tm_min, 248 tm->tm_hour, tm->tm_mday, 249 tm->tm_mon, tm->tm_year, tm->tm_wday); 250 251 fm3130->regs[FM3130_ALARM_SECONDS] = 252 (tm->tm_sec != -1) ? bin2bcd(tm->tm_sec) : 0x80; 253 254 fm3130->regs[FM3130_ALARM_MINUTES] = 255 (tm->tm_min != -1) ? bin2bcd(tm->tm_min) : 0x80; 256 257 fm3130->regs[FM3130_ALARM_HOURS] = 258 (tm->tm_hour != -1) ? bin2bcd(tm->tm_hour) : 0x80; 259 260 fm3130->regs[FM3130_ALARM_DATE] = 261 (tm->tm_mday != -1) ? bin2bcd(tm->tm_mday) : 0x80; 262 263 fm3130->regs[FM3130_ALARM_MONTHS] = 264 (tm->tm_mon != -1) ? bin2bcd(tm->tm_mon + 1) : 0x80; 265 266 dev_dbg(dev, "alarm write %02x %02x %02x %02x %02x\n", 267 fm3130->regs[FM3130_ALARM_SECONDS], 268 fm3130->regs[FM3130_ALARM_MINUTES], 269 fm3130->regs[FM3130_ALARM_HOURS], 270 fm3130->regs[FM3130_ALARM_DATE], 271 fm3130->regs[FM3130_ALARM_MONTHS]); 272 /* Writing time registers, we don't support multibyte transfers */ 273 for (i = 0; i < FM3130_ALARM_REGS; i++) { 274 i2c_smbus_write_byte_data(fm3130->client, 275 FM3130_ALARM_SECONDS + i, 276 fm3130->regs[FM3130_ALARM_SECONDS + i]); 277 } 278 fm3130->regs[FM3130_RTC_CONTROL] = 279 i2c_smbus_read_byte_data(fm3130->client, FM3130_RTC_CONTROL); 280 281 /* enable or disable alarm */ 282 if (alrm->enabled) { 283 i2c_smbus_write_byte_data(fm3130->client, FM3130_RTC_CONTROL, 284 (fm3130->regs[FM3130_RTC_CONTROL] & 285 ~(FM3130_RTC_CONTROL_BIT_CAL)) | 286 FM3130_RTC_CONTROL_BIT_AEN); 287 } else { 288 i2c_smbus_write_byte_data(fm3130->client, FM3130_RTC_CONTROL, 289 fm3130->regs[FM3130_RTC_CONTROL] & 290 ~(FM3130_RTC_CONTROL_BIT_CAL) & 291 ~(FM3130_RTC_CONTROL_BIT_AEN)); 292 } 293 294 /* We assume here that data is valid once written */ 295 if (!fm3130->alarm_valid) 296 fm3130->alarm_valid = 1; 297 298 return 0; 299 } 300 301 static int fm3130_alarm_irq_enable(struct device *dev, unsigned int enabled) 302 { 303 struct fm3130 *fm3130 = dev_get_drvdata(dev); 304 int ret = 0; 305 306 fm3130->regs[FM3130_RTC_CONTROL] = 307 i2c_smbus_read_byte_data(fm3130->client, FM3130_RTC_CONTROL); 308 309 dev_dbg(dev, "alarm_irq_enable: enable=%d, FM3130_RTC_CONTROL=%02x\n", 310 enabled, fm3130->regs[FM3130_RTC_CONTROL]); 311 312 switch (enabled) { 313 case 0: /* alarm off */ 314 ret = i2c_smbus_write_byte_data(fm3130->client, 315 FM3130_RTC_CONTROL, fm3130->regs[FM3130_RTC_CONTROL] & 316 ~(FM3130_RTC_CONTROL_BIT_CAL) & 317 ~(FM3130_RTC_CONTROL_BIT_AEN)); 318 break; 319 case 1: /* alarm on */ 320 ret = i2c_smbus_write_byte_data(fm3130->client, 321 FM3130_RTC_CONTROL, (fm3130->regs[FM3130_RTC_CONTROL] & 322 ~(FM3130_RTC_CONTROL_BIT_CAL)) | 323 FM3130_RTC_CONTROL_BIT_AEN); 324 break; 325 default: 326 ret = -EINVAL; 327 break; 328 } 329 330 return ret; 331 } 332 333 static const struct rtc_class_ops fm3130_rtc_ops = { 334 .read_time = fm3130_get_time, 335 .set_time = fm3130_set_time, 336 .read_alarm = fm3130_read_alarm, 337 .set_alarm = fm3130_set_alarm, 338 .alarm_irq_enable = fm3130_alarm_irq_enable, 339 }; 340 341 static struct i2c_driver fm3130_driver; 342 343 static int fm3130_probe(struct i2c_client *client, 344 const struct i2c_device_id *id) 345 { 346 struct fm3130 *fm3130; 347 int err = -ENODEV; 348 int tmp; 349 struct i2c_adapter *adapter = client->adapter; 350 351 if (!i2c_check_functionality(adapter, 352 I2C_FUNC_I2C | I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) 353 return -EIO; 354 355 fm3130 = devm_kzalloc(&client->dev, sizeof(struct fm3130), GFP_KERNEL); 356 357 if (!fm3130) 358 return -ENOMEM; 359 360 fm3130->client = client; 361 i2c_set_clientdata(client, fm3130); 362 fm3130->reg_addr_time = FM3130_RTC_SECONDS; 363 fm3130->reg_addr_alarm = FM3130_ALARM_SECONDS; 364 365 /* Messages to read time */ 366 fm3130->msg[0].addr = client->addr; 367 fm3130->msg[0].flags = 0; 368 fm3130->msg[0].len = 1; 369 fm3130->msg[0].buf = &fm3130->reg_addr_time; 370 371 fm3130->msg[1].addr = client->addr; 372 fm3130->msg[1].flags = I2C_M_RD; 373 fm3130->msg[1].len = FM3130_CLOCK_REGS; 374 fm3130->msg[1].buf = &fm3130->regs[FM3130_RTC_SECONDS]; 375 376 /* Messages to read alarm */ 377 fm3130->msg[2].addr = client->addr; 378 fm3130->msg[2].flags = 0; 379 fm3130->msg[2].len = 1; 380 fm3130->msg[2].buf = &fm3130->reg_addr_alarm; 381 382 fm3130->msg[3].addr = client->addr; 383 fm3130->msg[3].flags = I2C_M_RD; 384 fm3130->msg[3].len = FM3130_ALARM_REGS; 385 fm3130->msg[3].buf = &fm3130->regs[FM3130_ALARM_SECONDS]; 386 387 fm3130->alarm_valid = 0; 388 fm3130->data_valid = 0; 389 390 tmp = i2c_transfer(adapter, fm3130->msg, 4); 391 if (tmp != 4) { 392 dev_dbg(&client->dev, "read error %d\n", tmp); 393 err = -EIO; 394 goto exit_free; 395 } 396 397 fm3130->regs[FM3130_RTC_CONTROL] = 398 i2c_smbus_read_byte_data(client, FM3130_RTC_CONTROL); 399 fm3130->regs[FM3130_CAL_CONTROL] = 400 i2c_smbus_read_byte_data(client, FM3130_CAL_CONTROL); 401 402 /* Disabling calibration mode */ 403 if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_CAL) { 404 i2c_smbus_write_byte_data(client, FM3130_RTC_CONTROL, 405 fm3130->regs[FM3130_RTC_CONTROL] & 406 ~(FM3130_RTC_CONTROL_BIT_CAL)); 407 dev_warn(&client->dev, "Disabling calibration mode!\n"); 408 } 409 410 /* Disabling read and write modes */ 411 if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_WRITE || 412 fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_READ) { 413 i2c_smbus_write_byte_data(client, FM3130_RTC_CONTROL, 414 fm3130->regs[FM3130_RTC_CONTROL] & 415 ~(FM3130_RTC_CONTROL_BIT_READ | 416 FM3130_RTC_CONTROL_BIT_WRITE)); 417 dev_warn(&client->dev, "Disabling READ or WRITE mode!\n"); 418 } 419 420 /* oscillator off? turn it on, so clock can tick. */ 421 if (fm3130->regs[FM3130_CAL_CONTROL] & FM3130_CAL_CONTROL_BIT_nOSCEN) 422 i2c_smbus_write_byte_data(client, FM3130_CAL_CONTROL, 423 fm3130->regs[FM3130_CAL_CONTROL] & 424 ~(FM3130_CAL_CONTROL_BIT_nOSCEN)); 425 426 /* low battery? clear flag, and warn */ 427 if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_LB) { 428 i2c_smbus_write_byte_data(client, FM3130_RTC_CONTROL, 429 fm3130->regs[FM3130_RTC_CONTROL] & 430 ~(FM3130_RTC_CONTROL_BIT_LB)); 431 dev_warn(&client->dev, "Low battery!\n"); 432 } 433 434 /* check if Power On Reset bit is set */ 435 if (fm3130->regs[FM3130_RTC_CONTROL] & FM3130_RTC_CONTROL_BIT_POR) { 436 i2c_smbus_write_byte_data(client, FM3130_RTC_CONTROL, 437 fm3130->regs[FM3130_RTC_CONTROL] & 438 ~FM3130_RTC_CONTROL_BIT_POR); 439 dev_dbg(&client->dev, "POR bit is set\n"); 440 } 441 /* ACS is controlled by alarm */ 442 i2c_smbus_write_byte_data(client, FM3130_ALARM_WP_CONTROL, 0x80); 443 444 /* alarm registers sanity check */ 445 tmp = bcd2bin(fm3130->regs[FM3130_RTC_SECONDS] & 0x7f); 446 if (tmp > 59) 447 goto bad_alarm; 448 449 tmp = bcd2bin(fm3130->regs[FM3130_RTC_MINUTES] & 0x7f); 450 if (tmp > 59) 451 goto bad_alarm; 452 453 tmp = bcd2bin(fm3130->regs[FM3130_RTC_HOURS] & 0x3f); 454 if (tmp > 23) 455 goto bad_alarm; 456 457 tmp = bcd2bin(fm3130->regs[FM3130_RTC_DATE] & 0x3f); 458 if (tmp == 0 || tmp > 31) 459 goto bad_alarm; 460 461 tmp = bcd2bin(fm3130->regs[FM3130_RTC_MONTHS] & 0x1f); 462 if (tmp == 0 || tmp > 12) 463 goto bad_alarm; 464 465 fm3130->alarm_valid = 1; 466 467 bad_alarm: 468 469 /* clock registers sanity chek */ 470 tmp = bcd2bin(fm3130->regs[FM3130_RTC_SECONDS] & 0x7f); 471 if (tmp > 59) 472 goto bad_clock; 473 474 tmp = bcd2bin(fm3130->regs[FM3130_RTC_MINUTES] & 0x7f); 475 if (tmp > 59) 476 goto bad_clock; 477 478 tmp = bcd2bin(fm3130->regs[FM3130_RTC_HOURS] & 0x3f); 479 if (tmp > 23) 480 goto bad_clock; 481 482 tmp = bcd2bin(fm3130->regs[FM3130_RTC_DAY] & 0x7); 483 if (tmp == 0 || tmp > 7) 484 goto bad_clock; 485 486 tmp = bcd2bin(fm3130->regs[FM3130_RTC_DATE] & 0x3f); 487 if (tmp == 0 || tmp > 31) 488 goto bad_clock; 489 490 tmp = bcd2bin(fm3130->regs[FM3130_RTC_MONTHS] & 0x1f); 491 if (tmp == 0 || tmp > 12) 492 goto bad_clock; 493 494 fm3130->data_valid = 1; 495 496 bad_clock: 497 498 if (!fm3130->data_valid || !fm3130->alarm_valid) 499 dev_dbg(&client->dev, "%s: %15ph\n", "bogus registers", 500 fm3130->regs); 501 502 /* We won't bail out here because we just got invalid data. 503 Time setting from u-boot doesn't work anyway */ 504 fm3130->rtc = devm_rtc_device_register(&client->dev, client->name, 505 &fm3130_rtc_ops, THIS_MODULE); 506 if (IS_ERR(fm3130->rtc)) { 507 err = PTR_ERR(fm3130->rtc); 508 dev_err(&client->dev, 509 "unable to register the class device\n"); 510 goto exit_free; 511 } 512 return 0; 513 exit_free: 514 return err; 515 } 516 517 static struct i2c_driver fm3130_driver = { 518 .driver = { 519 .name = "rtc-fm3130", 520 }, 521 .probe = fm3130_probe, 522 .id_table = fm3130_id, 523 }; 524 525 module_i2c_driver(fm3130_driver); 526 527 MODULE_DESCRIPTION("RTC driver for FM3130"); 528 MODULE_AUTHOR("Sergey Lapin <slapin@ossfans.org>"); 529 MODULE_LICENSE("GPL"); 530 531