1 /* NXP PCF50633 Power Management Unit (PMU) driver 2 * 3 * (C) 2006-2008 by Openmoko, Inc. 4 * Author: Harald Welte <laforge@openmoko.org> 5 * Balaji Rao <balajirrao@openmoko.org> 6 * All rights reserved. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 * 13 */ 14 15 #include <linux/kernel.h> 16 #include <linux/device.h> 17 #include <linux/sysfs.h> 18 #include <linux/module.h> 19 #include <linux/types.h> 20 #include <linux/interrupt.h> 21 #include <linux/workqueue.h> 22 #include <linux/platform_device.h> 23 #include <linux/i2c.h> 24 #include <linux/irq.h> 25 26 #include <linux/mfd/pcf50633/core.h> 27 28 /* Two MBCS registers used during cold start */ 29 #define PCF50633_REG_MBCS1 0x4b 30 #define PCF50633_REG_MBCS2 0x4c 31 #define PCF50633_MBCS1_USBPRES 0x01 32 #define PCF50633_MBCS1_ADAPTPRES 0x01 33 34 static int __pcf50633_read(struct pcf50633 *pcf, u8 reg, int num, u8 *data) 35 { 36 int ret; 37 38 ret = i2c_smbus_read_i2c_block_data(pcf->i2c_client, reg, 39 num, data); 40 if (ret < 0) 41 dev_err(pcf->dev, "Error reading %d regs at %d\n", num, reg); 42 43 return ret; 44 } 45 46 static int __pcf50633_write(struct pcf50633 *pcf, u8 reg, int num, u8 *data) 47 { 48 int ret; 49 50 ret = i2c_smbus_write_i2c_block_data(pcf->i2c_client, reg, 51 num, data); 52 if (ret < 0) 53 dev_err(pcf->dev, "Error writing %d regs at %d\n", num, reg); 54 55 return ret; 56 57 } 58 59 /* Read a block of upto 32 regs */ 60 int pcf50633_read_block(struct pcf50633 *pcf, u8 reg, 61 int nr_regs, u8 *data) 62 { 63 int ret; 64 65 mutex_lock(&pcf->lock); 66 ret = __pcf50633_read(pcf, reg, nr_regs, data); 67 mutex_unlock(&pcf->lock); 68 69 return ret; 70 } 71 EXPORT_SYMBOL_GPL(pcf50633_read_block); 72 73 /* Write a block of upto 32 regs */ 74 int pcf50633_write_block(struct pcf50633 *pcf , u8 reg, 75 int nr_regs, u8 *data) 76 { 77 int ret; 78 79 mutex_lock(&pcf->lock); 80 ret = __pcf50633_write(pcf, reg, nr_regs, data); 81 mutex_unlock(&pcf->lock); 82 83 return ret; 84 } 85 EXPORT_SYMBOL_GPL(pcf50633_write_block); 86 87 u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg) 88 { 89 u8 val; 90 91 mutex_lock(&pcf->lock); 92 __pcf50633_read(pcf, reg, 1, &val); 93 mutex_unlock(&pcf->lock); 94 95 return val; 96 } 97 EXPORT_SYMBOL_GPL(pcf50633_reg_read); 98 99 int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val) 100 { 101 int ret; 102 103 mutex_lock(&pcf->lock); 104 ret = __pcf50633_write(pcf, reg, 1, &val); 105 mutex_unlock(&pcf->lock); 106 107 return ret; 108 } 109 EXPORT_SYMBOL_GPL(pcf50633_reg_write); 110 111 int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val) 112 { 113 int ret; 114 u8 tmp; 115 116 val &= mask; 117 118 mutex_lock(&pcf->lock); 119 ret = __pcf50633_read(pcf, reg, 1, &tmp); 120 if (ret < 0) 121 goto out; 122 123 tmp &= ~mask; 124 tmp |= val; 125 ret = __pcf50633_write(pcf, reg, 1, &tmp); 126 127 out: 128 mutex_unlock(&pcf->lock); 129 130 return ret; 131 } 132 EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask); 133 134 int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val) 135 { 136 int ret; 137 u8 tmp; 138 139 mutex_lock(&pcf->lock); 140 ret = __pcf50633_read(pcf, reg, 1, &tmp); 141 if (ret < 0) 142 goto out; 143 144 tmp &= ~val; 145 ret = __pcf50633_write(pcf, reg, 1, &tmp); 146 147 out: 148 mutex_unlock(&pcf->lock); 149 150 return ret; 151 } 152 EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits); 153 154 /* sysfs attributes */ 155 static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr, 156 char *buf) 157 { 158 struct pcf50633 *pcf = dev_get_drvdata(dev); 159 u8 dump[16]; 160 int n, n1, idx = 0; 161 char *buf1 = buf; 162 static u8 address_no_read[] = { /* must be ascending */ 163 PCF50633_REG_INT1, 164 PCF50633_REG_INT2, 165 PCF50633_REG_INT3, 166 PCF50633_REG_INT4, 167 PCF50633_REG_INT5, 168 0 /* terminator */ 169 }; 170 171 for (n = 0; n < 256; n += sizeof(dump)) { 172 for (n1 = 0; n1 < sizeof(dump); n1++) 173 if (n == address_no_read[idx]) { 174 idx++; 175 dump[n1] = 0x00; 176 } else 177 dump[n1] = pcf50633_reg_read(pcf, n + n1); 178 179 hex_dump_to_buffer(dump, sizeof(dump), 16, 1, buf1, 128, 0); 180 buf1 += strlen(buf1); 181 *buf1++ = '\n'; 182 *buf1 = '\0'; 183 } 184 185 return buf1 - buf; 186 } 187 static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL); 188 189 static ssize_t show_resume_reason(struct device *dev, 190 struct device_attribute *attr, char *buf) 191 { 192 struct pcf50633 *pcf = dev_get_drvdata(dev); 193 int n; 194 195 n = sprintf(buf, "%02x%02x%02x%02x%02x\n", 196 pcf->resume_reason[0], 197 pcf->resume_reason[1], 198 pcf->resume_reason[2], 199 pcf->resume_reason[3], 200 pcf->resume_reason[4]); 201 202 return n; 203 } 204 static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL); 205 206 static struct attribute *pcf_sysfs_entries[] = { 207 &dev_attr_dump_regs.attr, 208 &dev_attr_resume_reason.attr, 209 NULL, 210 }; 211 212 static struct attribute_group pcf_attr_group = { 213 .name = NULL, /* put in device directory */ 214 .attrs = pcf_sysfs_entries, 215 }; 216 217 int pcf50633_register_irq(struct pcf50633 *pcf, int irq, 218 void (*handler) (int, void *), void *data) 219 { 220 if (irq < 0 || irq > PCF50633_NUM_IRQ || !handler) 221 return -EINVAL; 222 223 if (WARN_ON(pcf->irq_handler[irq].handler)) 224 return -EBUSY; 225 226 mutex_lock(&pcf->lock); 227 pcf->irq_handler[irq].handler = handler; 228 pcf->irq_handler[irq].data = data; 229 mutex_unlock(&pcf->lock); 230 231 return 0; 232 } 233 EXPORT_SYMBOL_GPL(pcf50633_register_irq); 234 235 int pcf50633_free_irq(struct pcf50633 *pcf, int irq) 236 { 237 if (irq < 0 || irq > PCF50633_NUM_IRQ) 238 return -EINVAL; 239 240 mutex_lock(&pcf->lock); 241 pcf->irq_handler[irq].handler = NULL; 242 mutex_unlock(&pcf->lock); 243 244 return 0; 245 } 246 EXPORT_SYMBOL_GPL(pcf50633_free_irq); 247 248 static int __pcf50633_irq_mask_set(struct pcf50633 *pcf, int irq, u8 mask) 249 { 250 u8 reg, bits, tmp; 251 int ret = 0, idx; 252 253 idx = irq >> 3; 254 reg = PCF50633_REG_INT1M + idx; 255 bits = 1 << (irq & 0x07); 256 257 mutex_lock(&pcf->lock); 258 259 if (mask) { 260 ret = __pcf50633_read(pcf, reg, 1, &tmp); 261 if (ret < 0) 262 goto out; 263 264 tmp |= bits; 265 266 ret = __pcf50633_write(pcf, reg, 1, &tmp); 267 if (ret < 0) 268 goto out; 269 270 pcf->mask_regs[idx] &= ~bits; 271 pcf->mask_regs[idx] |= bits; 272 } else { 273 ret = __pcf50633_read(pcf, reg, 1, &tmp); 274 if (ret < 0) 275 goto out; 276 277 tmp &= ~bits; 278 279 ret = __pcf50633_write(pcf, reg, 1, &tmp); 280 if (ret < 0) 281 goto out; 282 283 pcf->mask_regs[idx] &= ~bits; 284 } 285 out: 286 mutex_unlock(&pcf->lock); 287 288 return ret; 289 } 290 291 int pcf50633_irq_mask(struct pcf50633 *pcf, int irq) 292 { 293 dev_info(pcf->dev, "Masking IRQ %d\n", irq); 294 295 return __pcf50633_irq_mask_set(pcf, irq, 1); 296 } 297 EXPORT_SYMBOL_GPL(pcf50633_irq_mask); 298 299 int pcf50633_irq_unmask(struct pcf50633 *pcf, int irq) 300 { 301 dev_info(pcf->dev, "Unmasking IRQ %d\n", irq); 302 303 return __pcf50633_irq_mask_set(pcf, irq, 0); 304 } 305 EXPORT_SYMBOL_GPL(pcf50633_irq_unmask); 306 307 int pcf50633_irq_mask_get(struct pcf50633 *pcf, int irq) 308 { 309 u8 reg, bits; 310 311 reg = irq >> 3; 312 bits = 1 << (irq & 0x07); 313 314 return pcf->mask_regs[reg] & bits; 315 } 316 EXPORT_SYMBOL_GPL(pcf50633_irq_mask_get); 317 318 static void pcf50633_irq_call_handler(struct pcf50633 *pcf, int irq) 319 { 320 if (pcf->irq_handler[irq].handler) 321 pcf->irq_handler[irq].handler(irq, pcf->irq_handler[irq].data); 322 } 323 324 /* Maximum amount of time ONKEY is held before emergency action is taken */ 325 #define PCF50633_ONKEY1S_TIMEOUT 8 326 327 static void pcf50633_irq_worker(struct work_struct *work) 328 { 329 struct pcf50633 *pcf; 330 int ret, i, j; 331 u8 pcf_int[5], chgstat; 332 333 pcf = container_of(work, struct pcf50633, irq_work); 334 335 /* Read the 5 INT regs in one transaction */ 336 ret = pcf50633_read_block(pcf, PCF50633_REG_INT1, 337 ARRAY_SIZE(pcf_int), pcf_int); 338 if (ret != ARRAY_SIZE(pcf_int)) { 339 dev_err(pcf->dev, "Error reading INT registers\n"); 340 341 /* 342 * If this doesn't ACK the interrupt to the chip, we'll be 343 * called once again as we're level triggered. 344 */ 345 goto out; 346 } 347 348 /* We immediately read the usb and adapter status. We thus make sure 349 * only of USBINS/USBREM IRQ handlers are called */ 350 if (pcf_int[0] & (PCF50633_INT1_USBINS | PCF50633_INT1_USBREM)) { 351 chgstat = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2); 352 if (chgstat & (0x3 << 4)) 353 pcf_int[0] &= ~(1 << PCF50633_INT1_USBREM); 354 else 355 pcf_int[0] &= ~(1 << PCF50633_INT1_USBINS); 356 } 357 358 /* Make sure only one of ADPINS or ADPREM is set */ 359 if (pcf_int[0] & (PCF50633_INT1_ADPINS | PCF50633_INT1_ADPREM)) { 360 chgstat = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2); 361 if (chgstat & (0x3 << 4)) 362 pcf_int[0] &= ~(1 << PCF50633_INT1_ADPREM); 363 else 364 pcf_int[0] &= ~(1 << PCF50633_INT1_ADPINS); 365 } 366 367 dev_dbg(pcf->dev, "INT1=0x%02x INT2=0x%02x INT3=0x%02x " 368 "INT4=0x%02x INT5=0x%02x\n", pcf_int[0], 369 pcf_int[1], pcf_int[2], pcf_int[3], pcf_int[4]); 370 371 /* Some revisions of the chip don't have a 8s standby mode on 372 * ONKEY1S press. We try to manually do it in such cases. */ 373 if ((pcf_int[0] & PCF50633_INT1_SECOND) && pcf->onkey1s_held) { 374 dev_info(pcf->dev, "ONKEY1S held for %d secs\n", 375 pcf->onkey1s_held); 376 if (pcf->onkey1s_held++ == PCF50633_ONKEY1S_TIMEOUT) 377 if (pcf->pdata->force_shutdown) 378 pcf->pdata->force_shutdown(pcf); 379 } 380 381 if (pcf_int[2] & PCF50633_INT3_ONKEY1S) { 382 dev_info(pcf->dev, "ONKEY1S held\n"); 383 pcf->onkey1s_held = 1 ; 384 385 /* Unmask IRQ_SECOND */ 386 pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT1M, 387 PCF50633_INT1_SECOND); 388 389 /* Unmask IRQ_ONKEYR */ 390 pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT2M, 391 PCF50633_INT2_ONKEYR); 392 } 393 394 if ((pcf_int[1] & PCF50633_INT2_ONKEYR) && pcf->onkey1s_held) { 395 pcf->onkey1s_held = 0; 396 397 /* Mask SECOND and ONKEYR interrupts */ 398 if (pcf->mask_regs[0] & PCF50633_INT1_SECOND) 399 pcf50633_reg_set_bit_mask(pcf, 400 PCF50633_REG_INT1M, 401 PCF50633_INT1_SECOND, 402 PCF50633_INT1_SECOND); 403 404 if (pcf->mask_regs[1] & PCF50633_INT2_ONKEYR) 405 pcf50633_reg_set_bit_mask(pcf, 406 PCF50633_REG_INT2M, 407 PCF50633_INT2_ONKEYR, 408 PCF50633_INT2_ONKEYR); 409 } 410 411 /* Have we just resumed ? */ 412 if (pcf->is_suspended) { 413 pcf->is_suspended = 0; 414 415 /* Set the resume reason filtering out non resumers */ 416 for (i = 0; i < ARRAY_SIZE(pcf_int); i++) 417 pcf->resume_reason[i] = pcf_int[i] & 418 pcf->pdata->resumers[i]; 419 420 /* Make sure we don't pass on any ONKEY events to 421 * userspace now */ 422 pcf_int[1] &= ~(PCF50633_INT2_ONKEYR | PCF50633_INT2_ONKEYF); 423 } 424 425 for (i = 0; i < ARRAY_SIZE(pcf_int); i++) { 426 /* Unset masked interrupts */ 427 pcf_int[i] &= ~pcf->mask_regs[i]; 428 429 for (j = 0; j < 8 ; j++) 430 if (pcf_int[i] & (1 << j)) 431 pcf50633_irq_call_handler(pcf, (i * 8) + j); 432 } 433 434 out: 435 put_device(pcf->dev); 436 enable_irq(pcf->irq); 437 } 438 439 static irqreturn_t pcf50633_irq(int irq, void *data) 440 { 441 struct pcf50633 *pcf = data; 442 443 dev_dbg(pcf->dev, "pcf50633_irq\n"); 444 445 get_device(pcf->dev); 446 disable_irq(pcf->irq); 447 schedule_work(&pcf->irq_work); 448 449 return IRQ_HANDLED; 450 } 451 452 static void 453 pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name, 454 struct platform_device **pdev) 455 { 456 struct pcf50633_subdev_pdata *subdev_pdata; 457 int ret; 458 459 *pdev = platform_device_alloc(name, -1); 460 if (!*pdev) { 461 dev_err(pcf->dev, "Falied to allocate %s\n", name); 462 return; 463 } 464 465 subdev_pdata = kmalloc(sizeof(*subdev_pdata), GFP_KERNEL); 466 if (!subdev_pdata) { 467 dev_err(pcf->dev, "Error allocating subdev pdata\n"); 468 platform_device_put(*pdev); 469 } 470 471 subdev_pdata->pcf = pcf; 472 platform_device_add_data(*pdev, subdev_pdata, sizeof(*subdev_pdata)); 473 474 (*pdev)->dev.parent = pcf->dev; 475 476 ret = platform_device_add(*pdev); 477 if (ret) { 478 dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret); 479 platform_device_put(*pdev); 480 *pdev = NULL; 481 } 482 } 483 484 #ifdef CONFIG_PM 485 static int pcf50633_suspend(struct device *dev, pm_message_t state) 486 { 487 struct pcf50633 *pcf; 488 int ret = 0, i; 489 u8 res[5]; 490 491 pcf = dev_get_drvdata(dev); 492 493 /* Make sure our interrupt handlers are not called 494 * henceforth */ 495 disable_irq(pcf->irq); 496 497 /* Make sure that any running IRQ worker has quit */ 498 cancel_work_sync(&pcf->irq_work); 499 500 /* Save the masks */ 501 ret = pcf50633_read_block(pcf, PCF50633_REG_INT1M, 502 ARRAY_SIZE(pcf->suspend_irq_masks), 503 pcf->suspend_irq_masks); 504 if (ret < 0) { 505 dev_err(pcf->dev, "error saving irq masks\n"); 506 goto out; 507 } 508 509 /* Write wakeup irq masks */ 510 for (i = 0; i < ARRAY_SIZE(res); i++) 511 res[i] = ~pcf->pdata->resumers[i]; 512 513 ret = pcf50633_write_block(pcf, PCF50633_REG_INT1M, 514 ARRAY_SIZE(res), &res[0]); 515 if (ret < 0) { 516 dev_err(pcf->dev, "error writing wakeup irq masks\n"); 517 goto out; 518 } 519 520 pcf->is_suspended = 1; 521 522 out: 523 return ret; 524 } 525 526 static int pcf50633_resume(struct device *dev) 527 { 528 struct pcf50633 *pcf; 529 int ret; 530 531 pcf = dev_get_drvdata(dev); 532 533 /* Write the saved mask registers */ 534 ret = pcf50633_write_block(pcf, PCF50633_REG_INT1M, 535 ARRAY_SIZE(pcf->suspend_irq_masks), 536 pcf->suspend_irq_masks); 537 if (ret < 0) 538 dev_err(pcf->dev, "Error restoring saved suspend masks\n"); 539 540 /* Restore regulators' state */ 541 542 543 get_device(pcf->dev); 544 545 /* 546 * Clear any pending interrupts and set resume reason if any. 547 * This will leave with enable_irq() 548 */ 549 pcf50633_irq_worker(&pcf->irq_work); 550 551 return 0; 552 } 553 #else 554 #define pcf50633_suspend NULL 555 #define pcf50633_resume NULL 556 #endif 557 558 static int __devinit pcf50633_probe(struct i2c_client *client, 559 const struct i2c_device_id *ids) 560 { 561 struct pcf50633 *pcf; 562 struct pcf50633_platform_data *pdata = client->dev.platform_data; 563 int i, ret = 0; 564 int version, variant; 565 566 pcf = kzalloc(sizeof(*pcf), GFP_KERNEL); 567 if (!pcf) 568 return -ENOMEM; 569 570 pcf->pdata = pdata; 571 572 mutex_init(&pcf->lock); 573 574 i2c_set_clientdata(client, pcf); 575 pcf->dev = &client->dev; 576 pcf->i2c_client = client; 577 pcf->irq = client->irq; 578 579 INIT_WORK(&pcf->irq_work, pcf50633_irq_worker); 580 581 version = pcf50633_reg_read(pcf, 0); 582 variant = pcf50633_reg_read(pcf, 1); 583 if (version < 0 || variant < 0) { 584 dev_err(pcf->dev, "Unable to probe pcf50633\n"); 585 ret = -ENODEV; 586 goto err; 587 } 588 589 dev_info(pcf->dev, "Probed device version %d variant %d\n", 590 version, variant); 591 592 /* Enable all interrupts except RTC SECOND */ 593 pcf->mask_regs[0] = 0x80; 594 pcf50633_reg_write(pcf, PCF50633_REG_INT1M, pcf->mask_regs[0]); 595 pcf50633_reg_write(pcf, PCF50633_REG_INT2M, 0x00); 596 pcf50633_reg_write(pcf, PCF50633_REG_INT3M, 0x00); 597 pcf50633_reg_write(pcf, PCF50633_REG_INT4M, 0x00); 598 pcf50633_reg_write(pcf, PCF50633_REG_INT5M, 0x00); 599 600 /* Create sub devices */ 601 pcf50633_client_dev_register(pcf, "pcf50633-input", 602 &pcf->input_pdev); 603 pcf50633_client_dev_register(pcf, "pcf50633-rtc", 604 &pcf->rtc_pdev); 605 pcf50633_client_dev_register(pcf, "pcf50633-mbc", 606 &pcf->mbc_pdev); 607 pcf50633_client_dev_register(pcf, "pcf50633-adc", 608 &pcf->adc_pdev); 609 610 for (i = 0; i < PCF50633_NUM_REGULATORS; i++) { 611 struct platform_device *pdev; 612 613 pdev = platform_device_alloc("pcf50633-regltr", i); 614 if (!pdev) { 615 dev_err(pcf->dev, "Cannot create regulator\n"); 616 continue; 617 } 618 619 pdev->dev.parent = pcf->dev; 620 pdev->dev.platform_data = &pdata->reg_init_data[i]; 621 pdev->dev.driver_data = pcf; 622 pcf->regulator_pdev[i] = pdev; 623 624 platform_device_add(pdev); 625 } 626 627 if (client->irq) { 628 ret = request_irq(client->irq, pcf50633_irq, 629 IRQF_TRIGGER_LOW, "pcf50633", pcf); 630 631 if (ret) { 632 dev_err(pcf->dev, "Failed to request IRQ %d\n", ret); 633 goto err; 634 } 635 } else { 636 dev_err(pcf->dev, "No IRQ configured\n"); 637 goto err; 638 } 639 640 if (enable_irq_wake(client->irq) < 0) 641 dev_err(pcf->dev, "IRQ %u cannot be enabled as wake-up source" 642 "in this hardware revision", client->irq); 643 644 ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group); 645 if (ret) 646 dev_err(pcf->dev, "error creating sysfs entries\n"); 647 648 if (pdata->probe_done) 649 pdata->probe_done(pcf); 650 651 return 0; 652 653 err: 654 kfree(pcf); 655 return ret; 656 } 657 658 static int __devexit pcf50633_remove(struct i2c_client *client) 659 { 660 struct pcf50633 *pcf = i2c_get_clientdata(client); 661 int i; 662 663 free_irq(pcf->irq, pcf); 664 665 platform_device_unregister(pcf->input_pdev); 666 platform_device_unregister(pcf->rtc_pdev); 667 platform_device_unregister(pcf->mbc_pdev); 668 platform_device_unregister(pcf->adc_pdev); 669 670 for (i = 0; i < PCF50633_NUM_REGULATORS; i++) 671 platform_device_unregister(pcf->regulator_pdev[i]); 672 673 kfree(pcf); 674 675 return 0; 676 } 677 678 static struct i2c_device_id pcf50633_id_table[] = { 679 {"pcf50633", 0x73}, 680 {/* end of list */} 681 }; 682 683 static struct i2c_driver pcf50633_driver = { 684 .driver = { 685 .name = "pcf50633", 686 .suspend = pcf50633_suspend, 687 .resume = pcf50633_resume, 688 }, 689 .id_table = pcf50633_id_table, 690 .probe = pcf50633_probe, 691 .remove = __devexit_p(pcf50633_remove), 692 }; 693 694 static int __init pcf50633_init(void) 695 { 696 return i2c_add_driver(&pcf50633_driver); 697 } 698 699 static void __exit pcf50633_exit(void) 700 { 701 i2c_del_driver(&pcf50633_driver); 702 } 703 704 MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU"); 705 MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>"); 706 MODULE_LICENSE("GPL"); 707 708 module_init(pcf50633_init); 709 module_exit(pcf50633_exit); 710